US3563533A — Copy sheet supply device

Claim 1

Independent Claim 379 words

A sheet supply device for feeding copy sheets from a stack to conveyor means in a copying machine in dependence on the insertion of an original into an exposure unit, comprising a first switch positioned in the path of the original and arranged to deliver a pulse signal upon tripping of the switch by the original; a second switch positioned in the feed path of the copy sheets and arranged to deliver a pulse signal in dependence on the delivery of a copy sheet into a ready position in advance of said conveyor means; conveyor means provided in the delivery path of the copy sheets subsequent to said second switch; a drive coupling comprising a driven drive roller and a disc mounted adjacent to said roller and having a peripheral recess, said drive roller being rotatable within said peripheral recess without contact with the disc but upon rotation of the disc drivingly engaging the periphery of the disc; first spring means acting on said disc and urging the disc towards said drive roller; first stop means which in one setting cause the disc to be held in a position in which said peripheral recess is aligned with the drive roller; main driving means arranged to drive said conveyor means and a sheet pickup device comprising a pickup roller; controlled actuating means arranged to release said first stop means from locking engagement with said disc, said actuating means being connected to said first and second switches and being selectively triggered to unlock said first stop means upon tripping of either of said first and second switches so as to thereby produce a limited time driving connection between said drive roller and said disc; clutch means connected at the output side of the disc of said drive coupling, said clutch means being engageable in dependence on the driving of said disc and driving the pickup device for the copy sheets; transmission means by which said pickup roller is rotated with a different sheet transport speed than said conveyor means which is driven directly from said main driving means; and a slipping clutch positioned between said pickup roller and said conveyor means and operative in dependence on the difference in the sheet transport speeds of said pickoff roller and said conveyor means.

Claim 2

Dependent Claim 379 words

A sheet supply device for feeding copy sheets from a stack to conveyor means in a copying machine in dependence on the insertion of an original into an exposure unit, comprising a first switch positioned in the path of the original and arranged to deliver a pulse signal upon tripping of the switch by the original; a second switch positioned in the feed path of the copy sheets and arranged to deliver a pulse signal in dependence on the delivery of a copy sheet into a ready position in advance of said conveyor means; conveyor means provided in the delivery path of the copy sheets subsequent to said second switch; a drive coupling comprising a driven drive roller and a disc mounted adjacent to said roller and having a peripheral recess, said drive roller being rotatable within said peripheral recess without contact with the disc but upon rotation of the disc drivingly engaging the periphery of the disc; first spring means acting on said disc and urging the disc towards said drive roller; first stop means which in one setting cause the disc to be held in a position in which said peripheral recess is aligned with the drive roller; main driving means arranged to drive said conveyor means and a sheet pickup device comprising a pickup roller; controlled actuating means arranged to release said first stop means from locking engagement with said disc, said actuating means being connected to said first and second switches and being selectively triggered to unlock said first stop means upon tripping of either of said first and second switches so as to thereby produce a limited time driving connection between said drive roller and said disc; clutch means connected at the output side of the disc of said drive coupling, said clutch means being engageable in dependence on the driving of said disc and driving the pickup device for the copy sheets; transmission means by which said pickup roller is rotated with a different sheet transport speed than said conveyor means which is driven directly from said main driving means; and a slipping clutch positioned between said pickup roller and said conveyor means and operative in dependence on the difference in the sheet transport speeds of said pickoff roller and said conveyor means.

Claim 3

Dependent Claim 43 words

A sheet supply device as claimed in claim 1, which includes a stop plate mounted on said disc, said stop plate being provided with a stepped peripheral surface for locking engagement with said first stop means, and said actuating means comprising a magnet.

Claim 4

Dependent Claim 123 words

A sheet supply device as claimed in claim 2, in which said stop plate has two peripheral steps 180* apart, said disc has two peripheral recesses also spaced 180* apart, said first spring means comprises a pair of springs respectively associated with said two recesses to urge said disc Into engagement with the continuously rotating drive roller upon release of said first stop means, and which also includes a sheet feed roller combination which is positioned in advance of the conveyor means and is arranged to carry the copy sheets from the ready position to the conveyor means, an abutment on said stop plate, and rod means cooperable with said abutment to act as a second stop means controlling the sheet feed combination.

Claim 5

Dependent Claim 93 words

A sheet supply device as claimed in claim 3, in which said sheet feed roller combination comprises a first continuously rotating roller and a second roller provided with a flat peripheral surface portion, said second roller being arranged to engage the first roller when the flat peripheral surface portion is moved towards said first roller, and which includes second spring means acting on said second roller, said rod means being engageable in a stop recess formed in said second roller and being releasable from this stop recess upon rotation of the stop plate.

Claim 6

Dependent Claim 135 words

A sheet supply device as claimed in claim 1, which includes second clutch means between the main driving means and the pickup roller for the copy sheets, said actuating means controlling one-half of said second clutch means in dependence on the tripping of either of said first and second switches, a changeover switch which is connected to said actuating means, which is arranged to be actuated in dependence on the engagement of said second clutch means, and which is positioned between said first switch and said second switch, and a trip arm arranged to trigger the change over switch and connected to said first clutch means positioned between the main driving means and the pickup device for the copy sheets, said first clutch means being engaged in response to each reversal of the changeover switch.

Claim 7

Dependent Claim 53 words

A sheet supply device as claimed in claim 5, in which the slipping clutch is positioned between the pickup roller and a continuously rotating roller of a sheet feed roller combination positioned in advance of said conveyor means and arranged to carry the copy sheets from the ready position to the conveyor means.

Claim 8

Dependent Claim 100 words

A sheet supply device as claimed in claim 1, which includes a shaft carrying said sheet pickup roller and on which the slipping clutch is mounted, said shaft being provided with an external thread, and wherein the slipping clutch comprises a first gear wheel having an internally threaded bore mounted on said shaft for reciprocating movement axially on the external thread, a stop carried by the shaft to limit said movement of the first gear wheel, and a continuously driven second gear wheel having an axial length corresponding to the amount of axial movement permitted to said first gear wheel.

Claim 9

Dependent Claim 102 words

A sheet supply device as claimed in claim 5, in which said second clutch means comprises two clutch portions which on their facing surfaces are provided with meshing steps and inclined surfaces adjacent to said steps, and wherein spring means are provided which act on one of said clutch portions which is axially moveable in order to move this clutch portion towards the other clutch portion in accordance with the relationship of the meshing steps, wherein the movable clutch portion is connected to said changeover switch, and said trip arm is arranged between the movable clutch portion and said first clutch means.

Claim 10

Dependent Claim 171 words

A sheet supply device as claimed in claim 3, in which said first stop means are connected to the actuating magnet and said first and second switches are connected in the excitation circuit thereof, said rod means comprises a pivot lever pivotally mounted on a support frame, engageable with said abutment on the stop plate, and cooperable with a stepped recess in a clutch wheel which is in driving connection with an intermittently driven roller of said sheet feed roller combination, and wherein the steps in the stop plate and two peripheral recesses in the disc are associated with said single abutment in such manner that said intermittently driven roller afTer release by the first switch when it is tripped by the original is maintained in a released drivable condition until the second switch causes a further triggering of said actuating means upon delivery of the next copy sheet to the ready position, a trip arm for said second switch being mounted in a peripheral recess in said intermittently driven roller.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1974-02-15	1974-08-17	1975-02-16	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1978-02-15	1978-08-17	1979-02-16	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1982-02-15	1982-08-17	1983-02-16	$7700.00	Window Closed / Lapsed

Copy sheet supply device

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag