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US3635463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet feeder off a stack of sheets
Assignee: Stobb Inc
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Filing: 1970-05-08
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Granted: 1972-01-18
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Expires: 1990-05-08
Abstract
Abstract A sheet feeder for transferring sheets from a stack of sheets and forming them in a second stack of sheets, and including two sheet pickup belts disposed to singly remove sheets from the first stack and place them in an imbricated relation and move them to a bed which strips the sheets from the belts and places them into a second stack. A motor is used for driving the belts, and a sensor is used for detecting the height of the second stack and to thereby turn the motor off and on for driving the belts to control the height of the second stack. The belts are adjustable for positioning to select the height of the second stack and also for positioning to accommodate sheets of different lengths. A rotating brush for singly feeding the sheets from the first stack and onto the belts in the imbricated or stream relation.
Inventors
- 👤 Anton R Stobb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:38
CPC Classifications
B; B65; B65H; B65H3/00; B65H3/02; B65H3/04; B65H3/047; B65H29/00; B65H29/12; B65H29/14; B65H5/00; B65H5/02; B65H5/021; B65H5/023; B65H2301/00; B65H2301/40; B65H2301/42; B65H2301/421; B65H2301/4214; B65H2301/42146; B65H2404/00; B65H2404/20; B65H2404/26; B65H2404/261; B65H2701/00; B65H2701/10; B65H2701/19; B65H2701/1932
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
201 words
A sheet feeder for transferring sheets from a first and upright stack of sheets and forming a second stack of sheets of a controlled size, comprising two sheet pickup belts disposed in overlying relation to each other and extending adjacent the upper end of said first stack, a sheet pickup member in contact with said sheets at said upper end of said first stack to singly remove sheets from said upper end of said first stack and feed said sheets in an imbricated relation to a position between said two belts with the leading ends of said sheets being against one of said two belts and with the trailing ends of said sheets being against the other of said two belts, a bed disposed adjacent said one of said belts for stripping said sheets from said one belt and forming said second stack of said sheets, a motor for driving said one of said belts, and a sensor connected to said motor for turning said motor off and on and with said sensor being operable in response to the size of said second stack in the off and on control of said motor for controlling the size of said second stack.
Claim 2
Dependent Claim
201 words
A sheet feeder for transferring sheets from a first and upright stack of sheets and forming a second stack of sheets of a controlled size, comprising two sheet pickup belts disposed in overlying relation to each other and extending adjacent the upper end of said first stack, a sheet pickup member in contact with said sheets at said upper end of said first stack to singly remove sheets from said upper end of said first stack and feed said sheets in an imbricated relation to a position between said two belts with the leading ends of said sheets being against one of said two belts and with the trailing ends of said sheets being against the other of said two belts, a bed disposed adjacent said one of said belts for stripping said sheets from said one belt and forming said second stack of said sheets, a motor for driving said one of said belts, and a sensor connected to said motor for turning said motor off and on and with said sensor being operable in response to the size of said second stack in the off and on control of said motor for controlling the size of said second stack.
Claim 3
Dependent Claim
64 words
The sheet feeder as claimed in claim 1, including movable support means supporting said one belt for selective positioning of said one belt relative to said bed and thereby adjustably establish the size of said second stack, said sensor being movably mounted for positioning relative to the positioning of said movable support means and in the direction of the growth of said second stack.
Claim 4
Dependent Claim
31 words
The sheet feeder as claimed in claim 2, wherein said sensor is mounted on said movable support means for movement with the latter in controlling the size of said second stack.
Claim 5
Dependent Claim
39 words
The sheet feeder as claimed in claim 1, wherein said pickup member is a brush rotatably mounted for engagement with said leading ends of said sheets in said first stack, for separating and feeding said sheets onto said belts.
Claim 6
Dependent Claim
85 words
The sheet feeder as claimed in claim 1, including a second motor operative on said first stack for advancing said first stack upwardly toward said belts, a portion of said other belt extending over said upper end, and a sensor operatively connected to said second motor and being responsive according to the position of said upper end of said first stack for turning said second motor on and off to control the advance of said first stack up to said portion of said other belt.
Claim 7
Dependent Claim
50 words
The sheet feeder as claimed in claim 5, including movably mounted support means supporting said portion of said other belt for movement of said portion in the directions of the longitudinal axis of said first stack to position said portion in contact with said upper end of said first stack.
Claim 8
Dependent Claim
59 words
The sheet feeder as claimed in claim 1, including rotatably and movably mounted pulleys for guiding said one belt in movement past said second stack and past said bed, and support means for said pulleys for positioning said pulleys in the directions along the longitudinal axis of said second stack according to the desired size of said second stack.
Claim 9
Dependent Claim
24 words
The sheet feeder as claimed in claim 7, including sheet gathering mechanism disposed adjacent said bed for removing said sheets from said second stack.
Claim 10
Dependent Claim
30 words
The sheet feeder as claimed in claim 7, wherein said pulleys are movably mounted for movement toward and away from said bed to accommodate sheets of more than one length.
Claim 11
Dependent Claim
49 words
The sheet feeder as claimed in claim 9, including rotatably and movably mounted pulleys for guiding said other belt, and common support means for movably mounting at lest some of said pulleys of both said belts such that positioning of said support means simultaneously selectively positions both said belts.
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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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |