Patent US3910567A successfully refreshed from Google Patents.
US3910567A
Expired / Lapsed
US
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Sheet material feeder
Assignee: AB Dick Co
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Filing: 1973-11-05
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Granted: 1975-10-07
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Expires: 1993-11-05
Abstract
Abstract A sheet material feeding device includes a rotatable driver member axially supported at a position spaced above a top sheet of a stack of sheets in a sheet tray. A feed member is pivotally connected to the driver member in an eccentric relationship relative to the axis of the driver member. In operation, the driver member moves the feed member in a forward feed stroke during a portion of each revolution of the driver member and moves the feed member in a rearward return stroke during the remaining portion of the revolution. The feed member extends outwardly and angularly downwardly from the driver member towards the top sheet of the stack in the direction of movement of the sheet. The free end of the feed member adjacent the top sheet is provided with a frictional element for engaging and advancing the sheet in response to a forward stroke of the feed member and is raised out of engagement with the sheet in response to a rearward stroke of the feed member to avoid retrograde movement or streaking of the sheet being fed.
Inventors
- 👤 Larry A Songer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:41
CPC Classifications
B; B65; B65H; B65H3/00; B65H3/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
225 words
A sheet material feeding device for advancing a top sheet from a stack of sheets, comprising: a driver member supported for rotation about an axis transverse to the direction of movement of the sheet at a position spaced above the stack of sheets; an elongate feed member connected at one end eccentrically to the driver member solely by a pivotal connection and extending downwardly and forwardly from the driver member in the direction of feed of the sheet to normally rest at its other end by gravity upon the top surface of the sheet at a point substantially displaced from a point beneath the driver member axis; said feed member being movable through a forward feed stroke and a rearward return stroke and including at said other end a frictional element for advancing the top sheet from the stack; and means for rotating the driver member at a velocity sufficient to impart to the frictional element a partially constrained orbital motion having a reciprocatory component along the plane of the top of the stack of sheets for moving the frictional element into engagement with the top sheet during the forward stroke of the feed member and for moving the frictional element out of engagement with the top sheet during substantially the complete rearward stroke of the feed member in each revolution of the driver member.
Claim 2
Dependent Claim
225 words
A sheet material feeding device for advancing a top sheet from a stack of sheets, comprising: a driver member supported for rotation about an axis transverse to the direction of movement of the sheet at a position spaced above the stack of sheets; an elongate feed member connected at one end eccentrically to the driver member solely by a pivotal connection and extending downwardly and forwardly from the driver member in the direction of feed of the sheet to normally rest at its other end by gravity upon the top surface of the sheet at a point substantially displaced from a point beneath the driver member axis; said feed member being movable through a forward feed stroke and a rearward return stroke and including at said other end a frictional element for advancing the top sheet from the stack; and means for rotating the driver member at a velocity sufficient to impart to the frictional element a partially constrained orbital motion having a reciprocatory component along the plane of the top of the stack of sheets for moving the frictional element into engagement with the top sheet during the forward stroke of the feed member and for moving the frictional element out of engagement with the top sheet during substantially the complete rearward stroke of the feed member in each revolution of the driver member.
Claim 3
Dependent Claim
37 words
A sheet material feeding device as set forth in claim 1 in which the downwardly and forwardly extending feed member forms a feed angle of between 10* and 45* with the top of the stack of sheets.
Claim 4
Dependent Claim
19 words
A sheet material feeding device as set forth in claim 1 in which the frictional element comprises silicone rubber.
Claim 5
Dependent Claim
33 words
A sheet material feeding device as set forth in claim 1 in which the means for rotating the driver member includes a motor having a drive shaft for axially supporting the driver member.
Claim 6
Dependent Claim
77 words
A sheet material feeding device as set forth in claim 1 in which the stack of sheets is positioned in a sheet tray having a side guide for registering one side of the stack; and said feed member extends in the direction of movement of the sheet and angularly outwardly towards the side guide to urge a side edge of the top sheet into alignment against the side guide during advancement of the sheet from the stack.
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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |