US5014288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray coating weight controller and sensor
Assignee: Honeywell Measurex Corp
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Filing: 1989-04-20
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Granted: 1991-05-07
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Expires: 2009-04-20
Abstract
Abstract An x-ray sensor for determining the amount and composition of a multi-component material is disclosed. The sensor is particularly useful for determining the amount and chemical composition of a coating spread on a continuously moving paper sheet or filler material mixed into such a sheet.
Inventors
- 👤 Lee M. Chase
- 👤 John D. Goss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:57
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/02; G01N23/06; G01N23/16; D; D21; D21F; D21F1/00; G01G; G01G9/00; G01G9/005; G01N23/083
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
124 words
An apparatus for measuring a 3 component first material associated with a second material, the apparatus comprising: source means for directing first, second and third x-ray beams through the first and second materials; detector means for detecting the three x-ray beams after they are transmitted through the first and second materials and for producing first, second and third signals in response to the first, second and third beams respectively; a computer, operatively coupled to the detector means for receiving the first, second and third signals, the computer being programmed to substantially continuously determine the amount of the first material associated with second material based upon the first signal, the substantially continuous determination being periodically adjusted based upon changes in the second and third signals.
Claim 2
Independent Claim
124 words
An apparatus for measuring a 3 component first material associated with a second material, the apparatus comprising: source means for directing first, second and third x-ray beams through the first and second materials; detector means for detecting the three x-ray beams after they are transmitted through the first and second materials and for producing first, second and third signals in response to the first, second and third beams respectively; a computer, operatively coupled to the detector means for receiving the first, second and third signals, the computer being programmed to substantially continuously determine the amount of the first material associated with second material based upon the first signal, the substantially continuous determination being periodically adjusted based upon changes in the second and third signals.
Claim 3
Dependent Claim
57 words
The apparatus of claim 1, wherein the detector means includes first and second x-ray detectors and the source means includes a first x-ray source disposed to direct a first beam of x-rays toward the first x-ray detector and a second x-ray source disposed to alternately direct the second and third beams of x-rays toward the second detector.
Claim 4
Dependent Claim
48 words
The apparatus of claim 2, wherein the second x-ray source includes an x-ray tube disposed to direct a beam of x-rays toward the second detector, first and second x-ray filters and switching means for selectively inserting the first and second filters into the path of the x-ray beam.
Claim 5
Dependent Claim
33 words
The apparatus of claim 3, wherein the first x-ray source produces an x-ray beam having energies distributed to yield equalized effective absorption coefficients for each of the three components of the first material.
Claim 6
Dependent Claim
16 words
The apparatus of claim 3, wherein the first x-ray source is a source of monochromatic x-rays.
Claim 7
Dependent Claim
15 words
The apparatus of claim 5, wherein the first x-ray source is an isotopic x-ray source.
Claim 8
Dependent Claim
10 words
The apparatus of claim 6, wherein the isotope is Fe-55.
Claim 9
Dependent Claim
21 words
The apparatus of claim 1, further comprising means for periodically computing the amounts of the 3 components in the first material.
Claim 10
Independent Claim
106 words
A method for measuring a 3 component first material, the method comprising the steps of: directing first, second and third x-ray beams through the first material; producing first, second and third responses indicative, respectively, of the intensity of the first, second and third x-ray beams which are transmitted through the material; and periodically determining, at a first rate, the amount of the first material based upon the first response and periodically adjusting the determination of the amount of the first material based upon the second and third responses, the periodicity of the adjustment occurring at a second rate which is less frequent than the first rate.
Claim 11
Independent Claim
106 words
A method for measuring a 3 component first material, the method comprising the steps of: directing first, second and third x-ray beams through the first material; producing first, second and third responses indicative, respectively, of the intensity of the first, second and third x-ray beams which are transmitted through the material; and periodically determining, at a first rate, the amount of the first material based upon the first response and periodically adjusting the determination of the amount of the first material based upon the second and third responses, the periodicity of the adjustment occurring at a second rate which is less frequent than the first rate.
Claim 12
Dependent Claim
25 words
The method of claim 9, wherein the energy distribution of the first beam yields substantially equalized x-ray absorption coefficients for each of the three components.
Claim 13
Dependent Claim
12 words
The method of claim 9, wherein the first x-ray beam is monochromatic.
Claim 14
Dependent Claim
16 words
The method of claim 11, wherein the first x-ray beam emanates from an isotopic x-ray source.
Claim 15
Dependent Claim
12 words
The method of claim 12, wherein the isotopic x-ray source is Fe-55.
Claim 16
Dependent Claim
24 words
The method of claim 9, further comprising the steps of periodically determining the amounts of each of the three components in the first material.
Claim 17
Dependent Claim
17 words
The method of claim 14, wherein the first material is a coating applied to a second material.
References Cited (Backward Citations)
US3435220A
Cited
US3452193A
Cited
US3974386A
Cited
US3904876A
Cited
US4090074A
Cited
USRE30884E
Cited
GB2044443A
Cited
US4815116A
Cited
US4668867A
Cited
US4845730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-06 | 1994-11-05 | 1995-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-06 | 1998-11-05 | 1999-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-06 | 2002-11-05 | 2003-05-07 | $7700.00 | Window Closed / Lapsed |