US4678915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System and process for measuring and correcting the values of a parameter of a sheet material
Assignee: Honeywell Measurex Corp
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Filing: 1985-03-14
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Granted: 1987-07-07
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Expires: 2005-03-14
Abstract
Abstract A system for measuring the values of a parameter of a sheet of material is provided. The system includes a head system with sensors mounted therein and a distance correction system to correct the measured parameter for variations in the distance between parts of the head system.
Inventors
- 👤 John Dahlquist
- 👤 John Goss
- 👤 Gunnar Wennerberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:56
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/02; G01N23/06; G01N23/16; G01D; G01D5/00; G01D5/48; G01D5/50; G01D5/52; G01N21/00; G01N21/84; G01N21/86; G01B; G01B2210/00; G01B2210/40; G01B2210/42; G01B2210/46
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
159 words
A process for measuring the values of a parameter of a sheet of material at various points by a sensor system including a first head member and a second head member and for correcting the measured values of the parameter to account for variability of the separation of the head members from one another without determining the separation of either head member from the sheet, the process comprising; (a) measuring the values of the parameter with the sensor system without correction for variability of the separation of the head members from one another to provide uncorrected, measured values; (b) determining the separation of the head members from one another by transmitting a signal through the sheet but not determining the separation of the head members from the sheet; and, (c) correcting the uncorrected measured values according to the separation of the head members from one another, but not according to the separation of the head members from the sheet.
Claim 2
Dependent Claim
159 words
A process for measuring the values of a parameter of a sheet of material at various points by a sensor system including a first head member and a second head member and for correcting the measured values of the parameter to account for variability of the separation of the head members from one another without determining the separation of either head member from the sheet, the process comprising; (a) measuring the values of the parameter with the sensor system without correction for variability of the separation of the head members from one another to provide uncorrected, measured values; (b) determining the separation of the head members from one another by transmitting a signal through the sheet but not determining the separation of the head members from the sheet; and, (c) correcting the uncorrected measured values according to the separation of the head members from one another, but not according to the separation of the head members from the sheet.
Claim 3
Dependent Claim
64 words
A process according to claim 1 wherein the sheet of material is traveling in a first direction, the first head member and the second head member travel in a second direction which is perpendicular to the first direction, and the correction is made based upon separation of the head members only in the "Z" direction which is orthogonal to the first and second directions.
Claim 4
Dependent Claim
70 words
A process according to claim 1 wherein the sheet of material is traveling in a first direction, the first head member and the second head member travel in a second direction which is perpendicular to the first direction, and the correction is made based upon separation of the head members in a direction other than the "Z" direction wherein the "Z" direction is orthogonal to the first and second directions.
Claim 5
Dependent Claim
21 words
A process according to claim 1 wherein the separation of the head members from one another is determined by electromagnetic induction.
Claim 6
Dependent Claim
24 words
A process according to claim 1 wherein the separation of the head members from one another is determined while the values are being measured.
Claim 7
Dependent Claim
45 words
A process according to claim 1 wherein the separation of the head members from one another is determined when the head members are at a plurality of positions, each of said positions corresponding to a position at which a value of the parameter is measured.
Claim 8
Independent Claim
198 words
A system for measuring the values of a parameter of a sheet of material at various points by a sensor system including head means and for correcting the measured values of the parameter to account for variability of the separation of parts of the head means without measuring the distance from the sensor system to the sheet, the system comprising; (a) head means having a first part disposed on a first side of the sheet and a second part disposed on a second side of the sheet; (b) distance sensing means coupled to the head means to measure the distance between the two parts of the head means by transmitting a signal through the sheet; (c) sensor means coupled to the head means for measuring the values of a parameter of the sheet but not the distance between said sensor means and the sheet to produce uncorrected, measured values; (d) parameter determination means coupled to receive signals from the sensor means and from the distance sensing means for correcting the uncorrected, measured values according to the distance between said two parts of said head means but not according to the distance between the head means and the sheet.
Claim 9
Independent Claim
198 words
A system for measuring the values of a parameter of a sheet of material at various points by a sensor system including head means and for correcting the measured values of the parameter to account for variability of the separation of parts of the head means without measuring the distance from the sensor system to the sheet, the system comprising; (a) head means having a first part disposed on a first side of the sheet and a second part disposed on a second side of the sheet; (b) distance sensing means coupled to the head means to measure the distance between the two parts of the head means by transmitting a signal through the sheet; (c) sensor means coupled to the head means for measuring the values of a parameter of the sheet but not the distance between said sensor means and the sheet to produce uncorrected, measured values; (d) parameter determination means coupled to receive signals from the sensor means and from the distance sensing means for correcting the uncorrected, measured values according to the distance between said two parts of said head means but not according to the distance between the head means and the sheet.
Claim 10
Dependent Claim
34 words
A system according to claim 7 wherein the sensor means includes a source located in said first part of said head means and a detector located in said second part of said head means.
Claim 11
Dependent Claim
25 words
A system according to claim 7 wherein the sensor means includes a source and a detector both located in one part of said head means.
Claim 12
Dependent Claim
22 words
A system according to claim 7 wherein the distance sensing means includes a transducer mounted in one part of the head means.
Claim 13
Dependent Claim
34 words
A system according to claim 7 wherein the distance sensing means includes a transmitter mounted in one part of the head means and a receiver mounted in the other part of said head means.
Claim 14
Dependent Claim
13 words
A system according to claim 11 wherein the transmitter generates a magnetic field.
Claim 15
Dependent Claim
20 words
A system according to claim 11 wherein the signal from the transmitter is substantially unaffected by the sheet of material.
Claim 16
Dependent Claim
16 words
A system according to claim 7 wherein said second part is spaced apart from the sheet.
Claim 17
Dependent Claim
21 words
A system according to claim 7 wherein the sensor system measures at least one parameter other than thickness of the sheet.
Claim 18
Dependent Claim
17 words
A system according to claim 15 wherein the sensor system measures the basis weight of the sheet.
Claim 19
Dependent Claim
16 words
A system according to claim 15 wherein the sensor system measures the moisture of the sheet.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-06 | 1991-01-05 | 1991-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-06 | 1995-01-05 | 1995-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-06 | 1999-01-05 | 1999-07-07 | $7700.00 | Window Closed / Lapsed |