US3673865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for orthogonal variables
Assignee: Westvaco Corp
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Filing: 1971-04-21
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Granted: 1972-07-04
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Expires: 1991-04-21
Abstract
Abstract A method and apparatus for indicating a property of sheet of material of substantial width traveling at a high speed. Two sensors for sensing the property are mounted side by side so that they are simultaneously moved across the traveling sheet. The two sensors enable easy differentiation between variations in the cross direction and machine direction.
Inventors
- 👤 Alfred L Michaelsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:24
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/34; G01N33/346; G01B; G01B21/00; G01B21/02; G01B21/08; Y; Y10; Y10S; Y10S162/00; Y10S162/09; Y10S162/10; Y10S162/11
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
132 words
In combination with an apparatus for producing a substantially continuous sheet of material, a system for measuring the cross machine direction change of a parameter of said sheet which comprises: a. a frame, mounted on said machine in the cross machine direction; b. a first sensor and a second sensor movably mounted on said frame and tandemly aligned in the cross machine direction and providing first and second output signals proportional to said parameter; c. means for moving said sensors along said frame in the cross machine direction; d. means for simultaneously detecting said first and second output signals and providing a first difference signal proportional to the difference between said first and second output signals whereby said first difference signal is proportional to the cross machine direction change of said parameter.
Claim 2
Dependent Claim
132 words
In combination with an apparatus for producing a substantially continuous sheet of material, a system for measuring the cross machine direction change of a parameter of said sheet which comprises: a. a frame, mounted on said machine in the cross machine direction; b. a first sensor and a second sensor movably mounted on said frame and tandemly aligned in the cross machine direction and providing first and second output signals proportional to said parameter; c. means for moving said sensors along said frame in the cross machine direction; d. means for simultaneously detecting said first and second output signals and providing a first difference signal proportional to the difference between said first and second output signals whereby said first difference signal is proportional to the cross machine direction change of said parameter.
Claim 3
Dependent Claim
27 words
The system of claim 1 wherein said means for moving said sensors moves said first sensor and said second sensor at the same distance per unit time.
Claim 4
Dependent Claim
18 words
The system of claim 1 further including display means for displaying the value of said first difference signal.
Claim 5
Dependent Claim
14 words
The system of claim 3 wherein said display means is a cathode ray tube.
Claim 6
Independent Claim
63 words
The system of 1 which further includes: a. means for providing a third signal representative of the desired cross machine direction change of said parameter; b. means for comparing said third signal and said first difference signal to provide a second difference signal; and c means for controlling the cross machine direction change of said parameter in response to said second difference signal.
Claim 7
Independent Claim
63 words
The system of 1 which further includes: a. means for providing a third signal representative of the desired cross machine direction change of said parameter; b. means for comparing said third signal and said first difference signal to provide a second difference signal; and c means for controlling the cross machine direction change of said parameter in response to said second difference signal.
Claim 8
Dependent Claim
107 words
On an apparatus for producing a substantially continuous sheet of material, the process of determining the cross machine direction change of a parameter of said sheet comprising: a. simultaneously generating a first signal and a second signal wherein said first signal and said second signal are representative of the value of said parameter at a first point and a second point, respectively, wherein said first point and said second point are aligned in the cross machine direction; and b. comparing said first and second signal to generate a first difference signal, whereby said first difference signal is representative of the cross machine direction change of said parameter.
Claim 9
Dependent Claim
107 words
On an apparatus for producing a substantially continuous sheet of material, the process of determining the cross machine direction change of a parameter of said sheet comprising: a. simultaneously generating a first signal and a second signal wherein said first signal and said second signal are representative of the value of said parameter at a first point and a second point, respectively, wherein said first point and said second point are aligned in the cross machine direction; and b. comparing said first and second signal to generate a first difference signal, whereby said first difference signal is representative of the cross machine direction change of said parameter.
Claim 10
Dependent Claim
27 words
The process of claim 6 which further includes the steps of controlling the cross machine direction change of said parameter in response to said first difference signal.
Claim 11
Dependent Claim
174 words
On an apparatus for producing a substantially continuous sheet of material, the process of determining the cross machine direction change and the machine direction change of a parameter of said sheet comprising: a. simultaneously generating a first signal and a second signal wherein said first signal and said second signal are representative of the value of said parameter at a first point and a second point on said sheet, respectively, wherein said first point and said second point are aligned in the cross machine direction; b. comparing said first and second signal to generate a first difference signal; c. generating a third signal representative of said parameter at a third point on thE sheet, said third point being aligned in the machine direction with said first point; and d. comparing said first signal and said third signal to obtain a second difference signal whereby said first difference signal is representative of the cross machine direction change of said parameter and said second difference signal is representative of the machine direction change of said parameter.
Claim 12
Dependent Claim
174 words
On an apparatus for producing a substantially continuous sheet of material, the process of determining the cross machine direction change and the machine direction change of a parameter of said sheet comprising: a. simultaneously generating a first signal and a second signal wherein said first signal and said second signal are representative of the value of said parameter at a first point and a second point on said sheet, respectively, wherein said first point and said second point are aligned in the cross machine direction; b. comparing said first and second signal to generate a first difference signal; c. generating a third signal representative of said parameter at a third point on thE sheet, said third point being aligned in the machine direction with said first point; and d. comparing said first signal and said third signal to obtain a second difference signal whereby said first difference signal is representative of the cross machine direction change of said parameter and said second difference signal is representative of the machine direction change of said parameter.
Claim 13
Dependent Claim
44 words
The process of claim 8 which further includes the steps of: a. controlling the cross machine direction change of said parameter in response to said first difference signal. b. controlling the machine direction change of said parameter in response to said second difference signal.
Claim 14
Dependent Claim
233 words
On an apparatus for producing a substantially continuous sheet of material, the process of determining the cross machine direction change and the machine direction change of a parameter of said sheet comprising: a. simultaneously generating a first pair of signals wherein said first pair of signals is representative of the value of said parameter at a first pair of points, said first pair of points being aligned in the cross machine direction; b. simultaneously generating a second pair of signals wherein said second pair of signals is representative of the value of said parameter at a second pair of points, said second pair of points being aligned in the cross machine direction and at least one of said second pair of points being aligned in the machine direction with at least one of said first pair of points; c. generating a first difference signal representative of the difference between the two signals which comprised said first pair of signals; and d. generating a second difference signal representative of the difference between the signal in said second pair of signals and the signal in said first pair of signals which represent the two points aligned in the machine direction, whereby said first difference signal is representative of the change of said parameter in the cross machine direction and said second difference signal is representative of the change in said parameter in the machine direction.
Claim 15
Dependent Claim
233 words
On an apparatus for producing a substantially continuous sheet of material, the process of determining the cross machine direction change and the machine direction change of a parameter of said sheet comprising: a. simultaneously generating a first pair of signals wherein said first pair of signals is representative of the value of said parameter at a first pair of points, said first pair of points being aligned in the cross machine direction; b. simultaneously generating a second pair of signals wherein said second pair of signals is representative of the value of said parameter at a second pair of points, said second pair of points being aligned in the cross machine direction and at least one of said second pair of points being aligned in the machine direction with at least one of said first pair of points; c. generating a first difference signal representative of the difference between the two signals which comprised said first pair of signals; and d. generating a second difference signal representative of the difference between the signal in said second pair of signals and the signal in said first pair of signals which represent the two points aligned in the machine direction, whereby said first difference signal is representative of the change of said parameter in the cross machine direction and said second difference signal is representative of the change in said parameter in the machine direction.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |