Patent US5795394A successfully refreshed from Google Patents.
US5795394A
Expired / Lapsed
US
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Coating weight measuring and control apparatus
Assignee: Honeywell Measurex Corp
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Filing: 1997-06-02
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Granted: 1998-08-18
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Expires: 2017-06-02
Abstract
Abstract A sensor and a method for determining the basis weight of a coating material containing CaCO 3 on a substrate is described. The determined basis weight is insensitive to changes in the amount of substrate material underlying the coating. Signals from the sensor may be used in the control of a coating mechanism to provide a coating having a uniform basis weight.
Inventors
- 👤 Edward Belotserkovsky
- 👤 John A. Dahlquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:00
CPC Classifications
B; B05; B05C; B05C1/00; B05C1/04; B05C1/08; B05C1/086; B05C1/0869; B05C11/00; B05C11/02; B05C3/00; B05C3/18; G; G01; G01G; G01G17/00; G01G17/02; G01G9/00; G01G9/005
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
349 words
A coating system, comprising: a sheet coating apparatus for applying a coating material that contains CaCO 3 to the surface of a moving uncoated sheet that comprises a base sheet, the coating apparatus including a metering element for regulating the amount of the coating material which remains on a coated sheet after a moving uncoated sheet passes by the metering element; a first coating sensor disposed adjacent to the coated sheet and including a first radiation source disposed to direct a first beam of radiation into the coated sheet, and a first radiation receiver positioned to detect at least a portion of the first beam emerging from the coated sheet, the first receiver being configured to detect the amount of radiation in first and second separate wavelength regions of the infrared electromagnetic spectrum and to produce first and second signals therefrom, respectively indicative of the amount of detected radiation in the first and second regions, and wherein the first region is selected for radiation which is sensitive to the basis weight of the base sheet and the second region is selected for radiation which is approximately equally as sensitive as the radiation in the first region to the basis weight of the base sheet, but which is also sensitive to the CaCO 3 of the coating material, the sensitivity of the radiation in the first region to the CaCO 3 being different than the sensitivity of the radiation in the second region to the CaCO 3 and wherein the first region ranges from about 3.6 to 3.9 μm and the second region ranges from about 3.9 to 4.1 μm; a computer operatively coupled to the first receiver for computing the amount of coating material on the sheet from the first and second signals, the computer producing a third signal indicative of the computed amount of CaCO 3 in the coating material; and at least one actuator, operatively coupled to the computer and to the metering element, for adjusting the metering element in response to the third signal to regulate the amount of the coating material on the base sheet.
Claim 2
Dependent Claim
349 words
A coating system, comprising: a sheet coating apparatus for applying a coating material that contains CaCO 3 to the surface of a moving uncoated sheet that comprises a base sheet, the coating apparatus including a metering element for regulating the amount of the coating material which remains on a coated sheet after a moving uncoated sheet passes by the metering element; a first coating sensor disposed adjacent to the coated sheet and including a first radiation source disposed to direct a first beam of radiation into the coated sheet, and a first radiation receiver positioned to detect at least a portion of the first beam emerging from the coated sheet, the first receiver being configured to detect the amount of radiation in first and second separate wavelength regions of the infrared electromagnetic spectrum and to produce first and second signals therefrom, respectively indicative of the amount of detected radiation in the first and second regions, and wherein the first region is selected for radiation which is sensitive to the basis weight of the base sheet and the second region is selected for radiation which is approximately equally as sensitive as the radiation in the first region to the basis weight of the base sheet, but which is also sensitive to the CaCO 3 of the coating material, the sensitivity of the radiation in the first region to the CaCO 3 being different than the sensitivity of the radiation in the second region to the CaCO 3 and wherein the first region ranges from about 3.6 to 3.9 μm and the second region ranges from about 3.9 to 4.1 μm; a computer operatively coupled to the first receiver for computing the amount of coating material on the sheet from the first and second signals, the computer producing a third signal indicative of the computed amount of CaCO 3 in the coating material; and at least one actuator, operatively coupled to the computer and to the metering element, for adjusting the metering element in response to the third signal to regulate the amount of the coating material on the base sheet.
Claim 3
Dependent Claim
13 words
The coating system as in claim 1, wherein the radiation is infrared radiation.
Claim 4
Dependent Claim
243 words
The coating system as in claim 2, wherein the moving coated sheet has CaCO 3 incorporated in the base sheet thereof, the system further comprising; a second coating sensor disposed adjacent to the uncoated sheet and including a second radiation source disposed to direct a second beam of radiation into the uncoated sheet, and a second radiation receiver positioned to detect at least a portion of the second beam emerging from the uncoated sheet, the second receiver being configured to detect the amount of radiation in third and fourth separate wavelength regions of the electromagnetic spectrum and to produce fourth and fifth signals therefrom, respectively indicative of the amount of detected radiation in the third and fourth regions, and wherein the third region is selected for radiation which is sensitive to the basis weight of the uncoated sheet and the fourth region is selected for radiation which is approximately equally as sensitive as the radiation in the third region to the basis weight of the uncoated sheet, but which is also sensitive to the CaCO 3 incorporated into the base sheet of the uncoated sheet, and wherein the computer is operatively coupled to the second receiver for computing a sixth signal based upon the fourth and fifth signals indicative of the amount of the CaCO 3 in the base sheet, and wherein the computer computes the amount of CaCO 3 in the coating material on the sheet from the third and sixth signals.
Claim 5
Dependent Claim
28 words
The coating system of claim 3, wherein the first region is the same as the third region and the second region is the same as the fourth region.
Claim 6
Dependent Claim
31 words
The coating system of claim 1, wherein the uncoated sheet is paper, the first region is approximately centered around 3.8 μm and the second region is approximately centered around 4.0 μm.
Claim 7
Dependent Claim
68 words
The coating system of claim 1, further comprising a scanning mechanism, having the first sensor attached thereto, for scanning the first sensor back and forth along a line, and wherein the computer is programmed to determine the amount of CaCO 3 in the coating material on the sheet at various cross-directional positions of the sheet traversed by the scanning first sensor based upon the first and second signals.
Claim 8
Dependent Claim
24 words
The coating system of claim 1, wherein the coating material comprises chemical components selected from the group consisting of latex, dyes, fillers and clay.
Claim 9
Dependent Claim
33 words
The coating system of claim 1 wherein the first radiation receiver is positioned to detect the intensity of at least a portion of the first beam that is transmitted through the coated sheet.
Claim 10
Dependent Claim
33 words
The coating system of claim 1 wherein the first radiation receiver is positioned to detect the intensity of at least a portion of the first beam that is reflected from the coated sheet.
Claim 11
Dependent Claim
33 words
The coating system of claim 3 wherein the second radiation receiver is positioned to detect the intensity of at least a portion of the second beam that is transmitted through the uncoated sheet.
Claim 12
Dependent Claim
33 words
The coating system of claim 3 wherein the second radiation receiver is positioned to detect the intensity of at least a portion of the second beam that is reflected from the uncoated sheet.
Claim 13
Dependent Claim
65 words
The coating system of claim 3, further comprising a scanning mechanism, having the second sensor attached thereto, for scanning the second sensor back and forth along a line, and wherein the computer is programmed to determine the amount of CaCO 3 in the base sheet at various cross-directional positions of the sheet traversed by the scanning second sensor based upon the third and fourth signals.
Claim 14
Dependent Claim
66 words
The coating system of claim 6, further comprising a second scanning mechanism, having the second sensor attached thereto, for scanning the second sensor back and forth along a line, and wherein the computer is programmed to determine the amount of CaCO 3 in the base sheet at various cross-directional positions of the sheet traversed by the scanning second sensor based upon the third and fourth signals.
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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) | 2001-08-17 | 2002-02-16 | 2002-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-17 | 2006-02-16 | 2006-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-17 | 2010-02-16 | 2010-08-18 | $7700.00 | Window Closed / Lapsed |