US4026538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet pusher
Assignee: Pitney Bowes Inc
•
Filing: 1976-04-12
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Granted: 1977-05-31
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Expires: 1996-04-12
Abstract
Abstract A reciprocating sheet pusher for ejecting a topmost sheet of a stack of sheets outward seriatim from a sheet receiving bin having sheet ejecting support structure attached to a pusher arm which carries a roller ejecting element. A piece of stiff firm hair material affixed to the support structure clutches with controlled predetermined friction the axially supported rubber roller to resist movement on a forward sheet ejecting stroke of the reciprocating sheet pusher. If a predetermined resistance against a jammed sheet or an empty bin is encountered, the roller ejecting element rotates with limited controlled friction. The roller ejecting element rotates unrestrained when the sheet pusher moves in an opposite direction to that of ejecting a sheet.
Inventors
- 👤 Michael A. Brown
- 👤 Hans C. Mol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:17
CPC Classifications
B; B65; B65H; B65H3/00; B65H3/02; B65H3/06; B65H3/0615
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
166 words
A sheet pusher comprising a supporting member, an ejection roller carried by said supporting member, means mounting said ejection roller for rotary and reciprocable movement with respect to said supporting member, means attached to said supporting member and defining a surface disposed adjacent to the peripheral surface of said ejection roller and at an angle to the direction of reciprocable movement of said ejection roller, and material attached to said supporting surface to bias against said ejection roller with varying resistive force whereby said material forcibly restrains rotation of said roller when said sheet pusher is pushing a sheet while said ejection roller is adjacent one end of its reciprocable movement, provides limited rotation when a jammed sheet or an empty sheet supporting bin is encountered by said sheet pusher, and allows unrestrained free rotation of said ejection roller when said sheet pusher is moving in an opposite direction to said ejection direction while said ejection roller is at the other end of its reciprocable movement.
Claim 2
Dependent Claim
166 words
A sheet pusher comprising a supporting member, an ejection roller carried by said supporting member, means mounting said ejection roller for rotary and reciprocable movement with respect to said supporting member, means attached to said supporting member and defining a surface disposed adjacent to the peripheral surface of said ejection roller and at an angle to the direction of reciprocable movement of said ejection roller, and material attached to said supporting surface to bias against said ejection roller with varying resistive force whereby said material forcibly restrains rotation of said roller when said sheet pusher is pushing a sheet while said ejection roller is adjacent one end of its reciprocable movement, provides limited rotation when a jammed sheet or an empty sheet supporting bin is encountered by said sheet pusher, and allows unrestrained free rotation of said ejection roller when said sheet pusher is moving in an opposite direction to said ejection direction while said ejection roller is at the other end of its reciprocable movement.
Claim 3
Dependent Claim
32 words
A sheet pusher of claim 1 wherein said mounting means comprises corresponding slots in said supporting member whereby said ejection roller axially rotates and reciprocally moves with respect to said supporting member.
Claim 4
Dependent Claim
25 words
A sheet pusher of claim 2 wherein said supporting member comprises a U-shaped member wherein said slot is in each leg of said U-shaped member.
Claim 5
Dependent Claim
14 words
A sheet pusher of claim 1 wherein said material comprises stiff firm hair material.
Claim 6
Dependent Claim
11 words
A sheet pusher of claim 1 wherein said material comprises Astro-Turf.
Claim 7
Dependent Claim
17 words
A sheet pusher of claim 1 wherein said ejection roller comprises a soft pliable grooved rubber roller.
References Cited (Backward Citations)
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US1600088A
Cited
US2093384A
Cited
US2196189A
Cited
US3152801A
Cited
US3257794A
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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) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |