US3612839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variance partitioning
Assignee: Industrial Nucleonics Corp
•
Filing: 1967-11-13
•
Granted: 1971-10-12
•
Expires: 1987-11-13
Abstract
Abstract Disclosed are a system for and method of dividing or partitioning the total variance properties of a moving sheet into the components of: cross direction; long-term machine direction; short-term machine direction; total machine direction; cross direction; and profile. A single detector for the property is scanned at right angles to the sheet edges a plurality of times. During each scan the property is sampled a plurality of times to derive a profile contour. A computer responds to the sampled values to derive the variance components.
Inventors
- 👤 David A Spitz
- 👤 John E Dewitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:55
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/02; G01N23/06; G01N23/16; G01B; G01B15/00; G01B15/02; G01B15/025; G01B15/04; G01B15/045
Claims Analysis
Total Claims: 95
Claim 1
Independent Claim
103 words
A method of determining the cross machine variance of a property of a sheet moving in a machine direction comprising scanning a single detector of the property a plurality of times at substantially right angles to the edges of the moving sheet, deriving from outputs generated by the detector over several scans of the scanning detector a response indicative of cross and machine direction variances of the property and responding only to outputs of the single detector at the time it is scanning to substantially eliminate the machine direction variance from said response to provide an indication solely of the cross machine variance.
Claim 2
Independent Claim
103 words
A method of determining the cross machine variance of a property of a sheet moving in a machine direction comprising scanning a single detector of the property a plurality of times at substantially right angles to the edges of the moving sheet, deriving from outputs generated by the detector over several scans of the scanning detector a response indicative of cross and machine direction variances of the property and responding only to outputs of the single detector at the time it is scanning to substantially eliminate the machine direction variance from said response to provide an indication solely of the cross machine variance.
Claim 3
Dependent Claim
34 words
The method of claim 1 further including the step of combining the property variances derived from several scans of the detector to provide an indication of the total variance over the scanned sheet region.
Claim 4
Independent Claim
131 words
A method of determining the cross machine variance of a property of a sheet moving in a machine direction comprising scanning a single detector of the property a plurality of times at substantially right angles to the edges of the moving sheet, deriving from the scanning detector a response indicative of cross and machine direction variances of the property, and substantially eliminating the machine direction variance from the response to provide an indication solely of the cross machine variance, wherein variance in the machine direction is obtained by deriving signals commensurate with the value of the property at a plurality of zones across the sheet in response to each scan, and combining indications resulting from said signals to provide a measure of total variance of the property in the machine direction.
Claim 5
Independent Claim
131 words
A method of determining the cross machine variance of a property of a sheet moving in a machine direction comprising scanning a single detector of the property a plurality of times at substantially right angles to the edges of the moving sheet, deriving from the scanning detector a response indicative of cross and machine direction variances of the property, and substantially eliminating the machine direction variance from the response to provide an indication solely of the cross machine variance, wherein variance in the machine direction is obtained by deriving signals commensurate with the value of the property at a plurality of zones across the sheet in response to each scan, and combining indications resulting from said signals to provide a measure of total variance of the property in the machine direction.
Claim 6
Dependent Claim
31 words
The method of claim 3 wherein the indications resulting from the signals are combined by calculating the variance in each zone over said plurality of scans, and averaging the zone variance.
Claim 7
Dependent Claim
48 words
The method of claim 3 wherein variance in the machine direction is further obtained by averaging the value of the property for each scan, and calculating the variance of the average values to provide an indication of long-term variance in the machine direction over said plurality of scans.
Claim 8
Dependent Claim
38 words
The method of claim 5 further including the step of calculating average machine direction variance for one scan by subtracting long-term machine direction variance for one scan by subtracting long-term machine direction variance from total machine direction variance.
Claim 9
Dependent Claim
47 words
The method of claim 1 wherein variance in the machine direction is derived by averaging the value of the property for several scans, and calculating the variance of the average values to provide an indication of long-term variance in the machine direction over said plurality of scans.
Claim 10
Independent Claim
90 words
A method of determining the total variance of a property of a sheet moving in a machine direction comprising; while the sheet is moving, detecting the value of the property at a plurality of zones across the sheet at each of a multiplicity of noncontiguous locations along the moving sheet, deriving from the detected values signals indicative of the variances of the property in the cross machine and machine directions, and combining the signals to provide a measure of total sheet variance for the property over the detected sheet region.
Claim 11
Independent Claim
90 words
A method of determining the total variance of a property of a sheet moving in a machine direction comprising; while the sheet is moving, detecting the value of the property at a plurality of zones across the sheet at each of a multiplicity of noncontiguous locations along the moving sheet, deriving from the detected values signals indicative of the variances of the property in the cross machine and machine directions, and combining the signals to provide a measure of total sheet variance for the property over the detected sheet region.
Claim 12
Dependent Claim
38 words
The method of claim 8 wherein the property is detected by scanning a single detector across the zones substantially at right angles to the edges of the sheet a number of times equal to the multiplicity of locations.
Claim 13
Independent Claim
123 words
A method of determining the total variance of a property of a sheet moving in a machine direction comprising; while the sheet is moving, detecting the value of the property at a plurality of zones across the sheet at each of a multiplicity of noncontiguous locations along the moving sheet, deriving from the detected values functions of the variances of the property in the cross machine and machine directions, and combining the functions to provide a measure of total sheet variance for the property over the detected sheet region, wherein one of said functions is total machine direction variance, the total machine direction variance being obtained by calculating the property variance in each zone over said multiple locations, and averaging the zone variances.
Claim 14
Independent Claim
123 words
A method of determining the total variance of a property of a sheet moving in a machine direction comprising; while the sheet is moving, detecting the value of the property at a plurality of zones across the sheet at each of a multiplicity of noncontiguous locations along the moving sheet, deriving from the detected values functions of the variances of the property in the cross machine and machine directions, and combining the functions to provide a measure of total sheet variance for the property over the detected sheet region, wherein one of said functions is total machine direction variance, the total machine direction variance being obtained by calculating the property variance in each zone over said multiple locations, and averaging the zone variances.
Claim 15
Independent Claim
138 words
A method of determining the total variance of a property of a sheet moving in a machine direction comprising; while the sheet is moving, detecting the value of the property at a plurality of zones across the sheet at each of a multiplicity of noncontiguous locations along the moving sheet, deriving from the detected values functions of the variances of the property in the cross machine and machine directions, and combining the functions to provide a measure of total sheet variance for the property over the detected sheet region, wherein one of said functions is long term machine direction variance over the multiple locations, the long term machine direction variance being obtained by calculatinG the average value of the property at each of said locations, and computing the variance of the average values for all of said locations.
Claim 16
Independent Claim
138 words
A method of determining the total variance of a property of a sheet moving in a machine direction comprising; while the sheet is moving, detecting the value of the property at a plurality of zones across the sheet at each of a multiplicity of noncontiguous locations along the moving sheet, deriving from the detected values functions of the variances of the property in the cross machine and machine directions, and combining the functions to provide a measure of total sheet variance for the property over the detected sheet region, wherein one of said functions is long term machine direction variance over the multiple locations, the long term machine direction variance being obtained by calculatinG the average value of the property at each of said locations, and computing the variance of the average values for all of said locations.
Claim 17
Independent Claim
86 words
A method of determining the variance of a property of a sheet moving in a machine direction comprising scanning a detector of the property across the moving sheet a plurality of times substantially at right angles to the edges of the sheet, deriving a signal commensurate with a function of the value of the property for each scan of the detector across the sheet, and combining the signals resulting from several scans to derive an indication of long-term variance of the property in the machine direction.
Claim 18
Independent Claim
86 words
A method of determining the variance of a property of a sheet moving in a machine direction comprising scanning a detector of the property across the moving sheet a plurality of times substantially at right angles to the edges of the sheet, deriving a signal commensurate with a function of the value of the property for each scan of the detector across the sheet, and combining the signals resulting from several scans to derive an indication of long-term variance of the property in the machine direction.
Claim 19
Dependent Claim
34 words
The method of claim 12 further including the step of deriving an indication of variance of the property in the direction of movement of the detector across the sheet in response to said signals.
Claim 20
Dependent Claim
43 words
The method of claim 13 further including the step of combining the indications of long-term variance and variance in the direction of detector movement to derive an indication of total variance over the sheet area over the total region scanned by the detector.
Claim 21
Dependent Claim
34 words
The method of claim 14 further including the step of combining the indications of long-term variance in the machine direction and total variance to provide an indication of short-term variance in the machine direction.
Claim 22
Dependent Claim
45 words
The method of claim 14 further including the step of combining the indications of variance in the direction of movement of the detector across the sheet with the total machine direction and long-term machine direction variances to provide an indication of cross machine direction variance.
Claim 23
Dependent Claim
28 words
The method of claim 12 wherein the indication of long-term machine direction variance is derived by computing the variance of the average property value resulting from each scan.
Claim 24
Independent Claim
65 words
A method of determining the variance of a property of a sheet moving in a machine direction comprising; while the sheet is moving, detecting a function of the property at a plurality of zones across the moving sheet at each of several displaced locations along the moving sheet, and deriving from the functions an indication of total variance of the property in the machine direction.
Claim 25
Independent Claim
65 words
A method of determining the variance of a property of a sheet moving in a machine direction comprising; while the sheet is moving, detecting a function of the property at a plurality of zones across the moving sheet at each of several displaced locations along the moving sheet, and deriving from the functions an indication of total variance of the property in the machine direction.
Claim 26
Dependent Claim
23 words
The method of claim 18 further including the step of deriving from the functions an indication of long-term variance in the machine direction.
Claim 27
Dependent Claim
31 words
The method of claim 19 further including the step of combing the indications of total and long-term variances in the machine direction to derive an indication of short-term machine direction variance.
Claim 28
Dependent Claim
31 words
The method of claim 18 wherein total variance in the machine direction is derived by computing variance in each zone over the several locations, and averaging the variance for each zone.
Claim 29
Independent Claim
69 words
A method of determining the variance of a property of a sheet moving in a machine direction comprising; while the sheet is moving, detecting the average value of the property at each of a plurality of different locations along the moving sheet in the machine direction, and calculating the variance of said average values to provide an indication of the long-term variance of the property in the machine direction.
Claim 30
Independent Claim
69 words
A method of determining the variance of a property of a sheet moving in a machine direction comprising; while the sheet is moving, detecting the average value of the property at each of a plurality of different locations along the moving sheet in the machine direction, and calculating the variance of said average values to provide an indication of the long-term variance of the property in the machine direction.
Claim 31
Dependent Claim
33 words
The method of claim 22 wherein the average values are detected in response to translation of a single detector of the property across the sheet at substantially right angles to the sheet edges.
Claim 32
Dependent Claim
32 words
The method of claim 23 further including the step of deriving an indication of the variance over the region scanned by the detector of the property for each scan of the detector.
Claim 33
Dependent Claim
39 words
The method of claim 24 further including the steps of averaging the variance indications over the scanned region, and combing the average of the variance indications with the long-term machine direction variance to obtain a measure of total variance.
Claim 34
Independent Claim
73 words
A method of determining the variance of a property of a sheet moving in a machine direction comprising detecting the average value of the property at each of a plurality of different locationS along the moving sheet in the machine direction, and calculating a function indicative of the sum of the squares of said average values to provide an indication of the long-term machine direction variance of the property in the machine direction.
Claim 35
Independent Claim
73 words
A method of determining the variance of a property of a sheet moving in a machine direction comprising detecting the average value of the property at each of a plurality of different locationS along the moving sheet in the machine direction, and calculating a function indicative of the sum of the squares of said average values to provide an indication of the long-term machine direction variance of the property in the machine direction.
Claim 36
Dependent Claim
35 words
The method of claim 26 wherein the average values are detected by translating a single detector of the property a plurality of times across the moving sheet at substantially right angles to the sheet edges.
Claim 37
Independent Claim
121 words
A method of performing a statistical analysis of a property of a sheet moving in a machine direction comprising scanning a detector of the property a plurality of times at substantially right angles to the edges of the moving sheet whereby the detector derives a response indicative of the property in the machine and cross sheet directions, deriving a signal indicative of a function of the response for each of a plurality of cross sheet zones, each of said zones extending longitudinally in the machine direction, and accumulating the squares of a function of the derived signals for the zones over several scans to derive an indication of a variance function of the property in at least one of said directions.
Claim 38
Independent Claim
121 words
A method of performing a statistical analysis of a property of a sheet moving in a machine direction comprising scanning a detector of the property a plurality of times at substantially right angles to the edges of the moving sheet whereby the detector derives a response indicative of the property in the machine and cross sheet directions, deriving a signal indicative of a function of the response for each of a plurality of cross sheet zones, each of said zones extending longitudinally in the machine direction, and accumulating the squares of a function of the derived signals for the zones over several scans to derive an indication of a variance function of the property in at least one of said directions.
Claim 39
Dependent Claim
31 words
The method of claim 28 wherein the accumulating step includes separately accumulating squares of a function of the signals indicative of the response for each of the zones over several scans.
Claim 40
Independent Claim
146 words
A method of performing a statistical analysis of a property of a sheet moving in a machine direction comprising scanning a detector of the property a plurality of times at substantially right angles to the edges of the moving sheet whereby the detector derives a response indicative of the property in the machine and cross sheet directions, deriving a signal indicative of a function of the response for each of a plurality of cross sheet zones, each of said zones extending longitudinally in the machine direction in response to the signals derived from several scans of the gauge deriving first and second signals respectively indicative of long term machine direction variance of the property and at least another variance function of the property, and algebraically combing the values of said first and second signals for deriving an indication of short-term machine direction variance of the property.
Claim 41
Independent Claim
146 words
A method of performing a statistical analysis of a property of a sheet moving in a machine direction comprising scanning a detector of the property a plurality of times at substantially right angles to the edges of the moving sheet whereby the detector derives a response indicative of the property in the machine and cross sheet directions, deriving a signal indicative of a function of the response for each of a plurality of cross sheet zones, each of said zones extending longitudinally in the machine direction in response to the signals derived from several scans of the gauge deriving first and second signals respectively indicative of long term machine direction variance of the property and at least another variance function of the property, and algebraically combing the values of said first and second signals for deriving an indication of short-term machine direction variance of the property.
Claim 42
Independent Claim
147 words
A method of performing a statistical analysis of a property of a sheet moving in a machine direction comprising measuring the property at a plurality of cross sheet zones of the moving sheet, each of said zones extending longitudinally in the machine direction, performing the measurement in each zone at several displaced regions along the sheet length of the moving sheet, deriving a first group of signals indicative of a function of the value of the measured property at the locations where the measurement is performed, separately accumulating the signals for each of the zones to derive a second group of signals indicative of a function of the property, whereby a different signal of the second group is derived for each of the zones, and combining the signals of the second group for the different zones to provide an indication of a variance function of the property.
Claim 43
Independent Claim
147 words
A method of performing a statistical analysis of a property of a sheet moving in a machine direction comprising measuring the property at a plurality of cross sheet zones of the moving sheet, each of said zones extending longitudinally in the machine direction, performing the measurement in each zone at several displaced regions along the sheet length of the moving sheet, deriving a first group of signals indicative of a function of the value of the measured property at the locations where the measurement is performed, separately accumulating the signals for each of the zones to derive a second group of signals indicative of a function of the property, whereby a different signal of the second group is derived for each of the zones, and combining the signals of the second group for the different zones to provide an indication of a variance function of the property.
Claim 44
Dependent Claim
29 words
The method of claim 31 wherein the property is measured by scanning a detector for the property several times in a direction between the edges of the moving sheet.
Claim 45
Independent Claim
65 words
A method of determining the variance of a property of a sheet moving in a machine direction comprising; while the sheet is moving, detecting a function of the property at a plurality of zones across the moving sheet at each of several displaced locations along the moving sheet, and deriving from the functions an indication of a variance of the property in the machine direction.
Claim 46
Independent Claim
65 words
A method of determining the variance of a property of a sheet moving in a machine direction comprising; while the sheet is moving, detecting a function of the property at a plurality of zones across the moving sheet at each of several displaced locations along the moving sheet, and deriving from the functions an indication of a variance of the property in the machine direction.
Claim 47
Dependent Claim
15 words
The method of claim 33 wherein the variance indication is long term machine direction variance.
Claim 48
Dependent Claim
39 words
The method of claim 34 wherein the function of the property is detected by scanning a gauge for detecting the property a plurality of times in the direction between the edges of the moving sheet a Plurality of times.
Claim 49
Independent Claim
121 words
A method of statistically analyzing a property of a longitudinally translating sheet in respond to an output signal derived from a gauge for the property, comprising scanning the gauge in a direction between the edges of the moving sheet a plurality of times, said gauge deriving an indication of the property from each of a multiplicity of different cross sheet zones running in the direction of sheet translation, storing in a computer means signals indicative of the response of the gauge for the different zones and for at least some of the scans, and calculating in the computer means a variance function of the sheet property in response to the stored signals for the different zones and some of the scans.
Claim 50
Independent Claim
121 words
A method of statistically analyzing a property of a longitudinally translating sheet in respond to an output signal derived from a gauge for the property, comprising scanning the gauge in a direction between the edges of the moving sheet a plurality of times, said gauge deriving an indication of the property from each of a multiplicity of different cross sheet zones running in the direction of sheet translation, storing in a computer means signals indicative of the response of the gauge for the different zones and for at least some of the scans, and calculating in the computer means a variance function of the sheet property in response to the stored signals for the different zones and some of the scans.
Claim 51
Independent Claim
140 words
A method of performing a statistical analysis of a property of a sheet comprising measuring the property at a plurality of cross sheet zones of the sheet, each of said zones extending longitudinally in the machine direction, performing the measurement in each zone at several displaced regions along the sheet length of the sheet, deriving a first group of signals indicative of a function of the value of the measured property at the locations where the measurement is performed, separately accumulating the signals for each of the zones to derive a second group of signals indicative of a function of the property, whereby a different signal of the second group is derived for each of the zones, and combining the signals of the second group for the different zones to provide an indication of a variance function of the property.
Claim 52
Independent Claim
140 words
A method of performing a statistical analysis of a property of a sheet comprising measuring the property at a plurality of cross sheet zones of the sheet, each of said zones extending longitudinally in the machine direction, performing the measurement in each zone at several displaced regions along the sheet length of the sheet, deriving a first group of signals indicative of a function of the value of the measured property at the locations where the measurement is performed, separately accumulating the signals for each of the zones to derive a second group of signals indicative of a function of the property, whereby a different signal of the second group is derived for each of the zones, and combining the signals of the second group for the different zones to provide an indication of a variance function of the property.
Claim 53
Independent Claim
95 words
A system for computing a variance function of a property of a sheet moving in a machine direction, comprising means for deriving signals indicative of the property, said signals being derived from a plurality of zones across the moving sheet and at several locations along the moving sheet, means responsive to the signals for computing a response indicative of the average value of the property at each location along the sheet, and means responsive to said computing means for calculating the variance of the responses to derive an indication of long term machine direction variance.
Claim 54
Independent Claim
95 words
A system for computing a variance function of a property of a sheet moving in a machine direction, comprising means for deriving signals indicative of the property, said signals being derived from a plurality of zones across the moving sheet and at several locations along the moving sheet, means responsive to the signals for computing a response indicative of the average value of the property at each location along the sheet, and means responsive to said computing means for calculating the variance of the responses to derive an indication of long term machine direction variance.
Claim 55
Dependent Claim
59 words
The system of claim 38 further including means responsive to the signals for computing a response indicative of the variance of the property in each zone across the sheet for the several locations and means responsive to said last named computing means for calculating the average of the variance responses to provide an indication of total machine direction variance.
Claim 56
Dependent Claim
35 words
The system of claim 39 further including means responsive to both said calculating means for subtracting one of said variance indications from the other variance indication to derive a measure of short-term machine direction variance.
Claim 57
Dependent Claim
50 words
The system of claim 39 wherein said signals are derived in response to scanning a single detector of the property across the sheet several times, one at each of said locations, and means responsive to the scanned detector for calculating the variance of each profile derived by scanning the detector.
Claim 58
Dependent Claim
39 words
The system of claim 41 further including means responsive to all of said calculating means for combining profile variance with total machine direction and long-term machine direction variance to provide an indication of cross direction variance of the property.
Claim 59
Dependent Claim
36 words
The system of claim 41 further including means responsive to a pair of said calculating means for combining the indications of cross machine variance and total machine direction variance to provide an indication of total variance.
Claim 60
Dependent Claim
35 words
The system of claim 41 further including means responsive to a pair of said calculating means for combining the indications of long-term machine direction variance and profile variance to provide an indication of total variance.
Claim 61
Independent Claim
87 words
A system for computing a variance function of a property of a sheet in response to signals indicative of the property derived from a plurality of zones across the sheet and at several locations along the sheet comprising means responsive to the signals for computing a response indicative of the variance of the property for each zone across the sheet for the several locations and means responsive to said computing means for calculating the average of the responses to derive an indication of total machine direction variance.
Claim 62
Independent Claim
87 words
A system for computing a variance function of a property of a sheet in response to signals indicative of the property derived from a plurality of zones across the sheet and at several locations along the sheet comprising means responsive to the signals for computing a response indicative of the variance of the property for each zone across the sheet for the several locations and means responsive to said computing means for calculating the average of the responses to derive an indication of total machine direction variance.
Claim 63
Independent Claim
98 words
A system for computing a variance function of a property of a sheet moving in machine direction comprising a detector for the property, means for scanning said detector at substantially right angles to the edges of the sheet, said detector being scanned across the moving sheet several times, means responsive to said detector for deriving an indication of the average profile value of the property for each of said scans, and means responsive to said deriving means for calculating the variance of the average profile values to provide an indication of long-term machine direction variance of the property.
Claim 64
Independent Claim
98 words
A system for computing a variance function of a property of a sheet moving in machine direction comprising a detector for the property, means for scanning said detector at substantially right angles to the edges of the sheet, said detector being scanned across the moving sheet several times, means responsive to said detector for deriving an indication of the average profile value of the property for each of said scans, and means responsive to said deriving means for calculating the variance of the average profile values to provide an indication of long-term machine direction variance of the property.
Claim 65
Dependent Claim
48 words
The system of claim 46 further including means responsive to the detector for deriving an indication of profile variance, and means responsive to both said deriving means for combining the variance indications of profile and long-term machine direction to provide an indication of total variance of the property.
Claim 66
Dependent Claim
28 words
The system of claim 47 further including means responsive to indications indicative of machine direction variance and profile variance for deriving an indication of cross machine direction variance.
Claim 67
Independent Claim
123 words
The system for computing a variance function of a property of a sheet moving in a machine direction comprising a detector for the property, means for scanning said detector across the moving sheet at substantially right angles to the sheet to derive a signal indicative of a profile of the property, said detector being scanned several times, a memory responsive to the profile signals, said memory including means for storing signals indicative of the property at each of a plurality of zones across the sheet for the profile signal derived in response to each scan of said detector, and means responsive to and combining the stored signals for computing a first response indicative of a first machine direction variance function of the property.
Claim 68
Independent Claim
123 words
The system for computing a variance function of a property of a sheet moving in a machine direction comprising a detector for the property, means for scanning said detector across the moving sheet at substantially right angles to the sheet to derive a signal indicative of a profile of the property, said detector being scanned several times, a memory responsive to the profile signals, said memory including means for storing signals indicative of the property at each of a plurality of zones across the sheet for the profile signal derived in response to each scan of said detector, and means responsive to and combining the stored signals for computing a first response indicative of a first machine direction variance function of the property.
Claim 69
Dependent Claim
44 words
The system of claim 49 wherein said computing means includes means for computing a second response indicative of a second machine direction variance function of the property, and means for combining said responses to derive an indication of cross direction variance of the property.
Claim 70
Dependent Claim
22 words
The system of claim 50 wherein the first and second responses are respectively indicative of short-term machine direction variance and profile variance.
Claim 71
Dependent Claim
42 words
The system of claim 49 wherein said computing means includes means for computing a second response indicative of a cross direction variance function of the property, and means for combining said responses to derive an indication of total variance of the property.
Claim 72
Dependent Claim
22 words
The system of claim 52 wherein the first and second responses are indicative of long-term machine direction variance and profile variance, respectively.
Claim 73
Dependent Claim
22 words
The system of claim 52 wherein the first and second responses are indicative of total machine direction variance and cross direction variance.
Claim 74
Dependent Claim
52 words
The system of claim 49 wherein said computing means includes: means for computing an indication of the variance of the stored signals for each individual zone over the several scans, and means responsive to said last named means for averaging the variance indications to derive a measure of total machine direction variance.
Claim 75
Dependent Claim
54 words
The system of claim 49 wherein said computing means includes: means for computing an indication of the average of the signals for the plural zones of each profile, and means responsive to said last named means for computing the variance of said average indications to derive a measure of total long-term machine direction variance.
Claim 76
Independent Claim
104 words
A system for computing a variance function of a property of a sheet moving in a machine direction in Response to signals indicative of the property derived from measurements made at a plurality of zones across the moving sheet and at several locations along the moving sheet comprising means responsive to the signals for computing a response indicative of the average value of the property at each of several locations along the sheet, and means responsive to said computing means for calculating a function indicative of the sum of the squares of said average values to derive an indication of long-term machine direction variance.
Claim 77
Independent Claim
104 words
A system for computing a variance function of a property of a sheet moving in a machine direction in Response to signals indicative of the property derived from measurements made at a plurality of zones across the moving sheet and at several locations along the moving sheet comprising means responsive to the signals for computing a response indicative of the average value of the property at each of several locations along the sheet, and means responsive to said computing means for calculating a function indicative of the sum of the squares of said average values to derive an indication of long-term machine direction variance.
Claim 78
Dependent Claim
68 words
The system of claim 57 further including means responsive to the signals for computing another response commensurate with a function indicative of the sum of the squares of the property in each zone across the sheet for the several locations, and means responsive to said last named computing means for calculating the average of each of said another responses to provide an indication of total machine direction variance.
Claim 79
Dependent Claim
35 words
The system of claim 58 further including means responsive to both said calculating means for subtracting one of said variance indications from the other variance indication to derive a measure of short-term machine direction variance.
Claim 80
Dependent Claim
60 words
The system of claim 58 wherein said signals are derived in response to a single detector of the property scanning across the sheet several times, once at each of said locations, and means responsive to the scanned detector for calculating a function indicative of the sum of the squares of the response of each profile derived by scanning the detector.
Claim 81
Dependent Claim
39 words
The system of claim 60 further including mans responsive to all of said calculating means for combining profile variance with total machine direction and long-term machine direction variance to provide an indication of cross direction variance of the property.
Claim 82
Dependent Claim
36 words
The system of claim 51 further including means responsive to a pair of said calculating means for combining the indications of long term machine direction variance and profile variance to provide an indication of total variance.
Claim 83
Dependent Claim
36 words
The system of claim 60 further including means responsive to a pair of said calculating means for combining the indications of cross machine variance and total machine direction variance to provide an indication of total variance.
Claim 84
Independent Claim
105 words
A system for computing a variance function of a property of a sheet moving in machine direction comprising a detector for the property, means for scanning said detector at substantially right angles to the edges of the sheet, said detector being scanned across the moving sheet several times, means responsive to said detector for deriving an indication of the average profile value of the property for each of said scans, and means responsive to said deriving means for calculating a function indicative of the sum of the squares of the average profile values to provide an indication of long-term machine direction variance of the property.
Claim 85
Independent Claim
105 words
A system for computing a variance function of a property of a sheet moving in machine direction comprising a detector for the property, means for scanning said detector at substantially right angles to the edges of the sheet, said detector being scanned across the moving sheet several times, means responsive to said detector for deriving an indication of the average profile value of the property for each of said scans, and means responsive to said deriving means for calculating a function indicative of the sum of the squares of the average profile values to provide an indication of long-term machine direction variance of the property.
Claim 86
Dependent Claim
145 words
Apparatus for performing a statistical analysis of a property of a sheet moving in a machine direction, comprising a detector of the property, means for scanning the detector substantially at right angles to the edges of the moving sheet, whereby the detector is adapted to derive a response indicative of the property in the machine and cross sheet directions, said detector being scanned a plurality of times, means responsive to the detector for deriving a signal indicative of a function of the response for each of a plurality of cross sheet zones, each of said zones extending longitudinally in the machine direction, and means responsive to the signal deriving means for accumulating the squares of a function of the derived signals for the zones over several scans to derive an indication of a variance function of the property in at least one of said directions.
Claim 87
Dependent Claim
145 words
Apparatus for performing a statistical analysis of a property of a sheet moving in a machine direction, comprising a detector of the property, means for scanning the detector substantially at right angles to the edges of the moving sheet, whereby the detector is adapted to derive a response indicative of the property in the machine and cross sheet directions, said detector being scanned a plurality of times, means responsive to the detector for deriving a signal indicative of a function of the response for each of a plurality of cross sheet zones, each of said zones extending longitudinally in the machine direction, and means responsive to the signal deriving means for accumulating the squares of a function of the derived signals for the zones over several scans to derive an indication of a variance function of the property in at least one of said directions.
Claim 88
Dependent Claim
167 words
Apparatus for performing a statistical analysis of a property of a sheet moving in a machine direction with a detector of the property adapted to be scanned a plurality of times substantially at right angles to thE edges of the moving sheet, whereby the detector is adapted to derive a response indicative of the property in the machine and cross sheet directions, comprising means responsive to the detector for deriving a signal indicative of a function of the response for each of a plurality of cross sheet zones, each of said zones extending longitudinally in the machine direction, means responsive to the signal deriving means for accumulating the derived signals for the zones over several of the scans to derive first and second signals respectively indicative of long-term machine direction variance of the property and at least another variance function of the property, and means algebraically combining the values of said first and second signals for deriving an indication of short-term machine direction variance of the property.
Claim 89
Dependent Claim
167 words
Apparatus for performing a statistical analysis of a property of a sheet moving in a machine direction with a detector of the property adapted to be scanned a plurality of times substantially at right angles to thE edges of the moving sheet, whereby the detector is adapted to derive a response indicative of the property in the machine and cross sheet directions, comprising means responsive to the detector for deriving a signal indicative of a function of the response for each of a plurality of cross sheet zones, each of said zones extending longitudinally in the machine direction, means responsive to the signal deriving means for accumulating the derived signals for the zones over several of the scans to derive first and second signals respectively indicative of long-term machine direction variance of the property and at least another variance function of the property, and means algebraically combining the values of said first and second signals for deriving an indication of short-term machine direction variance of the property.
Claim 90
Dependent Claim
24 words
The apparatus of claim 66 wherein said signal accumulating means includes means for deriving the second signal as indicative of a total variance function.
Claim 91
Dependent Claim
159 words
Apparatus for performing a statistical analysis of a property of a sheet in response to measurements of the property made at a plurality of cross sheet zones, each of said zones extending longitudinally in the machine direction, said measurements being performed in each zone at several displaced regions along the length of the sheet, comprising means responsive to the measurements for deriving a first group of signals indicative of a function of the value of the property measured at each of the locations where the measurement is performed, means responsive to the first group of signals for separately accumulating the signals for each of the zones to derive a second group of signals indicative of a function of the property, whereby a different signal of the second group is derived for each of the zones, and means combining the signals for the different zones of the second group for deriving an indication of a variance function of the property.
Claim 92
Dependent Claim
159 words
Apparatus for performing a statistical analysis of a property of a sheet in response to measurements of the property made at a plurality of cross sheet zones, each of said zones extending longitudinally in the machine direction, said measurements being performed in each zone at several displaced regions along the length of the sheet, comprising means responsive to the measurements for deriving a first group of signals indicative of a function of the value of the property measured at each of the locations where the measurement is performed, means responsive to the first group of signals for separately accumulating the signals for each of the zones to derive a second group of signals indicative of a function of the property, whereby a different signal of the second group is derived for each of the zones, and means combining the signals for the different zones of the second group for deriving an indication of a variance function of the property.
Claim 93
Dependent Claim
56 words
The apparatus of claim 68 wherein said sheet is moving in a machine direction and further including a detector for the property, said detector being responsive to the moving sheet for deriving a response indicative of the measured sheet property, and means for scanning the detector in a direction between the edges of the moving sheet.
Claim 94
Independent Claim
120 words
A system for computing a variance function of a property of a sheet moving in a machine direction comprising a detector for the property, means for scanning said detector across the moving sheet at substantially right angles to the sheet edges to derive a signal indicative of a profile of the property, said detector being scanned several times, a memory responsive to the profile signals, said memory including means for storing signals indicative of the property at each of a plurality of zones across the sheet for the profile signal derived in response to each scan of said detector, and means responsive to and combining the stored signals for computing a response indicative of a variance function of the property.
Claim 95
Independent Claim
120 words
A system for computing a variance function of a property of a sheet moving in a machine direction comprising a detector for the property, means for scanning said detector across the moving sheet at substantially right angles to the sheet edges to derive a signal indicative of a profile of the property, said detector being scanned several times, a memory responsive to the profile signals, said memory including means for storing signals indicative of the property at each of a plurality of zones across the sheet for the profile signal derived in response to each scan of said detector, and means responsive to and combining the stored signals for computing a response indicative of a variance function of the property.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |