US3570735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus of guiding moving webs
Assignee: GPE Controls Inc
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Filing: 1968-11-18
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Granted: 1971-03-16
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Expires: 1988-11-18
Abstract
Abstract A method and apparatus for controlling the lateral position of a moving strip or web by sensing both the instantaneous lateral position of at least one edge of the web and the instantaneous angle between the actual path of travel of the web and the desired or ideal path. Appropriate signals commensurate with lateral position and angle are developed and combined to provide a control signal which sets the rate at which the web moves or ''''walks'''' laterally toward the desired position. The sensors may be positioned in proximity to the point at which control is desired without the usual sacrifice of stability associated with such positioning.
Inventors
- 👤 Robert S Kurz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:50
CPC Classifications
G; G05; G05D; G05D5/00; G05D5/04; G05D5/06; Y; Y10; Y10T; Y10T225/00; Y10T225/30; Y10T225/307; Y10T225/321; Y10T225/325; Y10T83/00; Y10T83/141; Y10T83/148; Y10T83/525; Y10T83/531; Y10T83/536
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
171 words
A method of controlling the lateral position of a moving web at a given location along the path of travel thereof relative to a reference position said method comprising: a. positioning sensing means in fixed relation to said reference position and in such relation to said web as to sense both positional angular deviation of the path of travel of a longitudinal section of said web from a line representing the path of travel of said section required in order to maintain a desired lateral position of said web at said given location; b. sensing the path of travel of said web section; and c. effecting relative lateral movement of said web pursuant to the path of travel sensed and said reference position at points spaced along the line of travel of said web to a position wherein said web is urged toward lateral movement at said given location in a direction tending to Correct said deviation and at a rate proportional to the summation of said positional and angular deviation.
Claim 2
Independent Claim
171 words
A method of controlling the lateral position of a moving web at a given location along the path of travel thereof relative to a reference position said method comprising: a. positioning sensing means in fixed relation to said reference position and in such relation to said web as to sense both positional angular deviation of the path of travel of a longitudinal section of said web from a line representing the path of travel of said section required in order to maintain a desired lateral position of said web at said given location; b. sensing the path of travel of said web section; and c. effecting relative lateral movement of said web pursuant to the path of travel sensed and said reference position at points spaced along the line of travel of said web to a position wherein said web is urged toward lateral movement at said given location in a direction tending to Correct said deviation and at a rate proportional to the summation of said positional and angular deviation.
Claim 3
Dependent Claim
19 words
The method according to claim 1 wherein said sensing means are positioned in close proximity to said given location.
Claim 4
Dependent Claim
42 words
The method according to claim 2 wherein said reference position, and therefore said sensing means, remain stationary, said relative lateral movement being effected by physically shifting said web laterally at a point spaced along said line of travel from said reference position.
Claim 5
Dependent Claim
19 words
The method according to claim 3 wherein said web is frictionally restrained against lateral movement at said given location.
Claim 6
Dependent Claim
56 words
The method according to claim 2 wherein said reference position, and therefore said sensing means, is movable, said relative lateral movement being effected by physically shifting said reference position and moving said web laterally therewith, while frictionally restraining said web against lateral movement at a point spaced along said line of travel from said reference position.
Claim 7
Dependent Claim
46 words
The method according to claim 1 wherein said sensing means comprise a pair of web edge position sensors positioned at spaced points along one edge of said web and each adapted to produce a signal commensurate with the lateral position of the web edge adjacent thereto.
Claim 8
Dependent Claim
33 words
The method according to claim 6 wherein said one edge comprises said longitudinal section and said signals commensurate with lateral position are combined to provide a resultant signal commensurate with said angular deviation.
Claim 9
Dependent Claim
39 words
The method according to claim 6 wherein said one edge comprises said longitudinal section and said sensors are calibrated to produce zero output when the path of travel of said web edge coincides with said line of required travel.
Claim 10
Dependent Claim
70 words
The invention according to claim 8 wherein said signals from each of said sensors are proportional in magnitude to the amount of deviation of said edge from said required line of travel and opposite in polarity for deviations on opposite sides of said line, and said signals from the two sensors are opposite in polarity from one another for deviations of said edge on the same side of said line.
Claim 11
Dependent Claim
48 words
The invention according to claim 9 wherein said signals from the two sensors are multiplied by different gain factors and are then summed to provide a resultant signal which is thereby commensurate with both positional and angular deviation of said edge from said line at said sensing means.
Claim 12
Independent Claim
100 words
The method of controlling the lateral position of a moving web at a given location along the path of travel thereof relative to a reference position, said method comprising the steps of: sensing angular deviation of the web from a desired path of travel and generating a signal therefor, sensing the positional deviation of the web from a desired lateral position and generating a signal therefor, combining the angular deviation and positional deviation signals to produce an error signal, and effecting lateral movement of said web and said reference position in response to said error signal to correct the deviation.
Claim 13
Independent Claim
100 words
The method of controlling the lateral position of a moving web at a given location along the path of travel thereof relative to a reference position, said method comprising the steps of: sensing angular deviation of the web from a desired path of travel and generating a signal therefor, sensing the positional deviation of the web from a desired lateral position and generating a signal therefor, combining the angular deviation and positional deviation signals to produce an error signal, and effecting lateral movement of said web and said reference position in response to said error signal to correct the deviation.
Claim 14
Dependent Claim
144 words
In an apparatus for controlling the lateral displacement of a longitudinal moving web at a given location along the path of travel thereof relative to a reference position: means for developing an error signal that includes a component commensurate with the deviation of the instantaneous path of travel of the web from the desired path of travel, said error-signal-developing means comprising means for sensing the angular deviation of the web from a desired path of travel and for developing an angular deviation signal, means for sensing the positional deviation of the web from a desired lateral position and for developing a positional deviation signal, and means summing the angular and positional deviation signals to produce said error signal, and means responding to said error signal to effect lateral movement of the web to correct the deviation at a rate proportional to said error signal.
Claim 15
Dependent Claim
144 words
In an apparatus for controlling the lateral displacement of a longitudinal moving web at a given location along the path of travel thereof relative to a reference position: means for developing an error signal that includes a component commensurate with the deviation of the instantaneous path of travel of the web from the desired path of travel, said error-signal-developing means comprising means for sensing the angular deviation of the web from a desired path of travel and for developing an angular deviation signal, means for sensing the positional deviation of the web from a desired lateral position and for developing a positional deviation signal, and means summing the angular and positional deviation signals to produce said error signal, and means responding to said error signal to effect lateral movement of the web to correct the deviation at a rate proportional to said error signal.
Claim 16
Dependent Claim
29 words
The combinaTion defined in claim 12, wherein said angular deviation sensing means includes first and second sensor means developing signals which are summed to provide the angular deviation signal.
Claim 17
Dependent Claim
22 words
The combination defined in claim 13, wherein the signal of one of said first and second sensors defines the positional deviation signal.
Claim 18
Dependent Claim
49 words
The combination defined in claim 14, wherein said first and second sensor means include a pair of web edge position sensors positioned at spaced points along one edge of the web and each adapted to produce a signal commensurate with the lateral position of the web edge adjacent thereto.
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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |