US3774271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet guiding and width-control apparatus
Assignee: Mount Hope Machinery Ltd
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Filing: 1970-08-27
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Granted: 1973-11-27
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Expires: 1990-08-27
Abstract
Abstract Apparatus for guiding an indefinite length of sheet or web material, such a cloth, in a predetermined path, and also for controlling the width of stretchable material. In one form, a pair of scroll rolls are driven at differentiable speeds in response to the lateral positions of one or both edges of the sheet, to guide it laterally into a desired path and to retain its proper width. For guiding non-stretchable material, one roll is driven at a predetermined speed, and the speed of the other is controlled by the position of one edge of the sheet. A guider control system is also provided in which the exhaust rate from fluid-operated motors driving a pair of rotatable sheet-stroking means is adjusted by edge-sensing means to control the relative speeds of the rolls. This control system can also be used with selvage uncurlers of a rotary disk type. Another guider control system employs a constant-speed motive means to drive one or both sheet-stroking means through variablespeed drive means at relative speeds controlled by the sheet-edge sensing means. The drive means may comprise variable-speed transmissions or clutches.
Inventors
- 👤 F Depuy
- 👤 N Santore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:47
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/02; B65H23/0204; B65H23/0208; D; D06; D06C; D06C3/00; D06C3/06; B65H2404/00; B65H2404/10; B65H2404/15; B65H2404/152; B65H2404/1521; B65H2404/15212; B65H2553/00; B65H2553/60; B65H2553/61
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
241 words
Apparatus for guiding a longitudinally-traveling indefinite length of sheet material, comprising: a pair of rotatable means having peripheral surface portions constructed and arranged for engaging and sTroking the opposite edge portions of the sheet laterally outwardly away from the longitudinal centerline of the sheet; drive means constructed and arranged for driving said rotatable means with differentiable linear surface velocities, said drive means including means for supplying pressure fluid, variablespeed fluid-operated motive means connected to receive pressure fluid from said supply means and drivingly connected with said rotatable means, and at least one adjustable exhaust valve means connected to control the rate of fluid exhaust from at least a portion of said motive means, thereby to control the relative surface velocities of said rotatable means; and sheet edge-sensing means constructed and arranged for detecting the lateral position of at least one edge of the sheet and operatively connected for adjusting said exhaust valve means to control the relative surface velocities of said rotatable means in response thereto; said edge sensing means maintaining a predetermined ratio between the surface velocities of said rotatable means while the sheet travels in a predetermined path, and being operative to adjust the ratio between the surface velocities of said rotatable means in response to a movement of at least one edge of the sheet away from said predetermined path, said adjustments in velocity ratio being made in a sense to guide the sheet in said predetermined path.
Claim 2
Dependent Claim
241 words
Apparatus for guiding a longitudinally-traveling indefinite length of sheet material, comprising: a pair of rotatable means having peripheral surface portions constructed and arranged for engaging and sTroking the opposite edge portions of the sheet laterally outwardly away from the longitudinal centerline of the sheet; drive means constructed and arranged for driving said rotatable means with differentiable linear surface velocities, said drive means including means for supplying pressure fluid, variablespeed fluid-operated motive means connected to receive pressure fluid from said supply means and drivingly connected with said rotatable means, and at least one adjustable exhaust valve means connected to control the rate of fluid exhaust from at least a portion of said motive means, thereby to control the relative surface velocities of said rotatable means; and sheet edge-sensing means constructed and arranged for detecting the lateral position of at least one edge of the sheet and operatively connected for adjusting said exhaust valve means to control the relative surface velocities of said rotatable means in response thereto; said edge sensing means maintaining a predetermined ratio between the surface velocities of said rotatable means while the sheet travels in a predetermined path, and being operative to adjust the ratio between the surface velocities of said rotatable means in response to a movement of at least one edge of the sheet away from said predetermined path, said adjustments in velocity ratio being made in a sense to guide the sheet in said predetermined path.
Claim 3
Dependent Claim
91 words
Apparatus as recited in claim 1, said drive means being operable normally to drive said rotatable means with a surface velocity in excess of the velocity of travel of the sheet thereby to tend to spread the sheet laterally, and being operable to reduce the velocity of at least one of said rotatable means to a value which remains at least equal to the velocity of the sheet in response to a movement of the edge of the sheet engaged by said one rotatable means laterally outwardly from a predetermined path.
Claim 4
Dependent Claim
55 words
Apparatus as recited in claim 1, said fluid-exhaust valve means being formed with an exhaust passage, and including a movable valve element valving said exhaust passage, said edge-sensing means being operable to adjust the area of said exhaust passage in response to a movement of an edge of the sheet laterally from said predetermined path.
Claim 5
Dependent Claim
34 words
Apparatus as recited in claim 3, said edge-sensing means being operative to adjust the area of said exhaust passage in proportionate response to displacement of an edge of the sheet from said predetermined path.
Claim 6
Dependent Claim
59 words
Apparatus as recited in claim 1, said drive means further including at least one adjustable flow control valve serially connected with said motive means and said exhaust valve means for limiting the rate of fluid exhaust from said motive means, thereby to limit the maximum velocities of said rotatable means in a fully-open position of said exhaust valve means.
Claim 7
Dependent Claim
101 words
Apparatus as recited in claim 1, said motive means including a pair of variable-speed fluid-operated motors each drivingly connected with one of said rotatable means; a pair of said adjustable exhaust valve means each connected to control independently the rate of exhaust from one of said pair of motors; said edge-sensing means being constructed and arranged to detect the positions of each edge of the sheet and to adjust said exhaust valve means independently, each in response to the position of a corresponding edge of the sheet, whereby said apparatus guides both edges of the sheet and thereby controls its width.
Claim 8
Dependent Claim
92 words
Apparatus as recited in claim 1, said drive means being constructed and arranged to drive one of said rotatable means at a predetermined surface velocity; and said exhaust valve means and motive means being operable to control the surface velocity of the other of said rotatable means at a value less than, equal to, or higher than said predetermined velocity, in response respectively to positions of an edge of the sheet engaged by said other rotatable means laterally outwardly of a predetermined path, in said path, or laterally inwardly of said Path.
Claim 9
Dependent Claim
72 words
Apparatus as recited in claim 1, said rotatable means comprising a pair of rotary selvage uncurlers one arranged to engage each edge portion of the sheet and comprising rotatable wheel means for stroking the edge portions outwardly away from the longitudinal centerline of the sheet when rotated in a direction such that portions of the wheel means engaging the sheet have components of linear velocity extending in the direction of sheet travel.
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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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |