US3891206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet stripping apparatus
Assignee: Xerox Corp
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Filing: 1973-07-02
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Granted: 1975-06-24
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Expires: 1993-07-02
Abstract
Abstract An automatically positionable sheet stripping finger for removing individual sheets of final support material from a moving photosensitive plate suitable for use in the automatic xerographic process. The stripper finger is supported upon a pivot arm provided with a pneumatic sensing nozzle capable of sensing the pressure maintained between the finger and the photosensitive plate surface. The nozzle, in turn, is operatively connected to an amplifier which is arranged to control the positioning of the lever arm in response to the back pressure developed at the nozzle. As the stripper finger moves toward or away from the operative position, the back pressure changes thus causing the amplifier to move the lever arm in a direction so as to restore the finger to the desired sheet stripping position.
Inventors
- 👤 Ari Bar-On
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:54
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6532; B; B65; B65H; B65H29/00; B65H29/54; B65H29/56; Y; Y10; Y10S; Y10S271/00; Y10S271/90
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
186 words
Apparatus for removing a sheet of final support material from a moving photosensitive surface including: sheet stripping means having a stripper element adapted to move between the support material and the moving photosensitive surface and a lever arm for movably supporting said stripper element adjacent to but spaced from the moving photosensitive surface, said stripper element having an air passageway formed therein terminating in a port adjacent said photosensitive surface, said passageway being provided with a source of air, variation in the distance between said port and said photosensitive surface causing a variation in the air pressure within the passage in said stripper element, means to movably support said lever arm whereby said stripper element is positionable relative to said moving photosensitive surface, pneumatic means operatively connected to said lever arm for positioning said arm whereby said stripper element is supported in a predetermined position adjacent to but spaced from said moving photosensitive surface, and control means operatively connected to said air passageway for actuating said pneumatic means in response to the pressure in said passageway whereby said lever arm is maintained in said predetermined position.
Claim 2
Dependent Claim
186 words
Apparatus for removing a sheet of final support material from a moving photosensitive surface including: sheet stripping means having a stripper element adapted to move between the support material and the moving photosensitive surface and a lever arm for movably supporting said stripper element adjacent to but spaced from the moving photosensitive surface, said stripper element having an air passageway formed therein terminating in a port adjacent said photosensitive surface, said passageway being provided with a source of air, variation in the distance between said port and said photosensitive surface causing a variation in the air pressure within the passage in said stripper element, means to movably support said lever arm whereby said stripper element is positionable relative to said moving photosensitive surface, pneumatic means operatively connected to said lever arm for positioning said arm whereby said stripper element is supported in a predetermined position adjacent to but spaced from said moving photosensitive surface, and control means operatively connected to said air passageway for actuating said pneumatic means in response to the pressure in said passageway whereby said lever arm is maintained in said predetermined position.
Claim 3
Dependent Claim
27 words
The apparatus of claim 1 wherein said control means comprises a fluid amplifier arranged to position said pneumatic means in response to the pressure in said passageway.
Claim 4
Dependent Claim
47 words
The apparatus of claim 2 wherein said pneumatic means includes a bellows means operatively connected to the fluid amplifier and a spring means acting upon said lever arm such that the bellows pressure and the spring force balance when said stripping means is in said predetermined position.
Claim 5
Dependent Claim
28 words
The apparatus of claim 1 further including stop means for preventing said sheet stripping means from contacting the photosensitive surface in the event said control means is inoperative.
Claim 6
Dependent Claim
19 words
The apparatus of claim 4, having further means to adjust the spring force acting against said sheet stripping means.
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) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |