US3879607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of measuring the amount of substance associated with a base material
Assignee: Honeywell Measurex Corp
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Filing: 1974-07-08
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Granted: 1975-04-22
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Expires: 1994-07-08
Abstract
Abstract One transmission wavelength such as 1.7 microns is used to measure wet end water weight of a paper making machine, the transmitted radiation having a transfer characteristic which is standardized by utilizing dry end basis weight measurements for establishing water weight. Variations caused by grade changes are also compensated.
Inventors
- 👤 Carolyn Bjorklund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:22
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/34; G01N33/346
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
127 words
A method for measuring the amount of moisture associated with a moving base material where said moisture is a significant proportion of the total weight of said base material such moisture having both radiation absorption and scattering characteristics comprising the following steps: directing infrared radiation of a single selected band at said material which is substantially insensitive to said absorption characteristic and relatively sensitive to said scattering characteristic; measuring the amount of said radiation received from said material, said received radiation being proportional to said amount of moisture; and standardizing said measured amount of radiation to accommodate long term changes in conditions by making an independent on-line measurement at a location on said base material substantially different than the location where radiation is directed at said material.
Claim 2
Independent Claim
127 words
A method for measuring the amount of moisture associated with a moving base material where said moisture is a significant proportion of the total weight of said base material such moisture having both radiation absorption and scattering characteristics comprising the following steps: directing infrared radiation of a single selected band at said material which is substantially insensitive to said absorption characteristic and relatively sensitive to said scattering characteristic; measuring the amount of said radiation received from said material, said received radiation being proportional to said amount of moisture; and standardizing said measured amount of radiation to accommodate long term changes in conditions by making an independent on-line measurement at a location on said base material substantially different than the location where radiation is directed at said material.
Claim 3
Independent Claim
127 words
A method for measuring the amount of moisture associated with a moving base material where said moisture is a significant proportion of the total weight of said base material such moisture having both radiation absorption and scattering characteristics comprising the following steps: directing infrared radiation of a single selected band at said material which is substantially insensitive to said absorption characteristic and relatively sensitive to said scattering characteristic; measuring the amount of said radiation received from said material, said received radiation being proportional to said amount of moisture; and standardizing said measured amount of radiation to accommodate long term changes in conditions by making an independent on-line measurement at a location on said base material substantially different than the location where radiation is directed at said material.
Claim 4
Independent Claim
127 words
A method for measuring the amount of moisture associated with a moving base material where said moisture is a significant proportion of the total weight of said base material such moisture having both radiation absorption and scattering characteristics comprising the following steps: directing infrared radiation of a single selected band at said material which is substantially insensitive to said absorption characteristic and relatively sensitive to said scattering characteristic; measuring the amount of said radiation received from said material, said received radiation being proportional to said amount of moisture; and standardizing said measured amount of radiation to accommodate long term changes in conditions by making an independent on-line measurement at a location on said base material substantially different than the location where radiation is directed at said material.
Claim 5
Dependent Claim
18 words
A method as in claim 1 where said radiation is in a wavelength band centered around 1.7 microns.
Claim 6
Dependent Claim
67 words
A method as in claim 1 including the step of measuring total weight at said location and where said independent on-line measurement is made at a location where said moisture is relatively insignificant and includes the measurement of total weight and said moisture to obtain dry weight, the difference between said dry weight and total weight providing an absolute indication of moisture which is used to standardize.
Claim 7
Independent Claim
193 words
A method for measuring the amount of moisture associated with a moving base material where said moisture is a significant proportion of the total weight of said base material such moisture having both radiation absorption and scattering characteristics comprising the following steps: directing infrared radiation of a single selected band at said material which is substantially insensitive to said absorption characteristic and relatively sensitive to said scattering characteristic; measuring the amount of said radiation received from said material, said received radiation being proportional to said amount of moisture; measuring the total weight of said material, which includes moisture and dry basis weight, at substantially the same location on said material where said radiation is directed; constructing a first family of characteristic curves relating said moisture to said amount of received radiation with said dry basis weight as a parameter; deriving from said first family of curves a second superimposed family of curves with said total weight as a parameter; relating said measured total weight to the corresponding total weight curve of said second family; and relating said measured amount of radiation to said corresponding total weight curve to obtain said amount of moisture.
Claim 8
Independent Claim
193 words
A method for measuring the amount of moisture associated with a moving base material where said moisture is a significant proportion of the total weight of said base material such moisture having both radiation absorption and scattering characteristics comprising the following steps: directing infrared radiation of a single selected band at said material which is substantially insensitive to said absorption characteristic and relatively sensitive to said scattering characteristic; measuring the amount of said radiation received from said material, said received radiation being proportional to said amount of moisture; measuring the total weight of said material, which includes moisture and dry basis weight, at substantially the same location on said material where said radiation is directed; constructing a first family of characteristic curves relating said moisture to said amount of received radiation with said dry basis weight as a parameter; deriving from said first family of curves a second superimposed family of curves with said total weight as a parameter; relating said measured total weight to the corresponding total weight curve of said second family; and relating said measured amount of radiation to said corresponding total weight curve to obtain said amount of moisture.
Claim 9
Dependent Claim
54 words
A method as in claim 4 where said first family of curves is constructed off-line by (a) making a range of samples of base material to be measured, (b) placing the samples in containers of water for several hours and (c) drying the samples in varying degrees to provide a range of moisture contents.
Claim 10
Dependent Claim
72 words
A method as in Claim 4 where said measured amount of radiation is related to said corresponding total weight curve by representing said family of total weight curves in terms of slope versus total weight and intercept versus total weight said amount of moisture being a function of the product of slope, at said measured total weight, and said measured amount of radiation added to said intercept at said measured total weight.
References Cited (Backward Citations)
US3597616A
Cited
US3757122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |