Patent US3885782A successfully refreshed from Google Patents.
US3885782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet feeder
Assignee: Xerox Corp
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Filing: 1973-12-06
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Granted: 1975-05-27
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Expires: 1993-12-06
Abstract
Abstract An automatic document handler for supplying documents singly from a supply tray to the platen of a processing apparatus such as a copying machine. Documents are separated from the document supply and transported to a multiple document rejecting mechanism where excess documents are driven back toward the document tray, the rejecting mechanism being subsequently retracted from the document path to minimize the drag force on the document being forwarded and provide a more positive forward drive force thereon.
Inventors
- 👤 David D Wright
- 👤 Ivor Hawkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:22
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/62; G03B27/6207; G03B27/625; G03B27/6264
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
217 words
In an apparatus for separating and feeding individual sheets of material from a stack of sheet material including separator means adapted for engagement with one sheet in the stack to separate the sheet from the stack, feed means adjacent said separator means for engaging and feeding the separated sheets away from the stack, a retard roll adapted for cooperation with said feed means, drive means adapted to rotate said retard roll in a direction to return excess separated sheets to the stack of sheet material; and slip means associated with said drive means and said retard roll adapted to allow said retard roll to rotate in a feed direction when a single sheet is present between said retard roll and said feed means, the improvement comprising: sheet sensing means adapted to sense the presence of a sheet between said feed means and said retard roll, said sheet sensing means being adapted to momentarily de-energize said feed means to allow time for said retard roll to return excess separated sheets to the stack; and, lift means adapted to move said retard roll out of engagement with said feed means after the excess sheets have been cleared from between said retard roll and said feed means to remove the drag on the sheet being forwarded by said feed means.
Claim 2
Dependent Claim
217 words
In an apparatus for separating and feeding individual sheets of material from a stack of sheet material including separator means adapted for engagement with one sheet in the stack to separate the sheet from the stack, feed means adjacent said separator means for engaging and feeding the separated sheets away from the stack, a retard roll adapted for cooperation with said feed means, drive means adapted to rotate said retard roll in a direction to return excess separated sheets to the stack of sheet material; and slip means associated with said drive means and said retard roll adapted to allow said retard roll to rotate in a feed direction when a single sheet is present between said retard roll and said feed means, the improvement comprising: sheet sensing means adapted to sense the presence of a sheet between said feed means and said retard roll, said sheet sensing means being adapted to momentarily de-energize said feed means to allow time for said retard roll to return excess separated sheets to the stack; and, lift means adapted to move said retard roll out of engagement with said feed means after the excess sheets have been cleared from between said retard roll and said feed means to remove the drag on the sheet being forwarded by said feed means.
Claim 3
Dependent Claim
68 words
Apparatus according to claim 1 further including a feed shoe adapted for engagement with said feed means, said shoe being movable into engagement with the sheet material when said retard roll is moved out of engagement therewith, said feed shoe forcing the sheet being fed against said feed means to assure positive feeding thereof and blocking passage of excess separated sheets between said feed means and said shoe.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |