Sheet feeder for second pass copy substrate
AssigneeXerox Corporation
InventorJohn F. Derrick
Life of this patent
Estimating the term…
Abstract
A sheet feeder for feeding sheets from a support platform comprising a sheet support platform, a rotatable sheet feed roll reciprocally movable between a sheet feeding position wherein it is in feeding engagement with the top sheet when at least one sheet is on said support platform and a retracted standby position wherein it is retracted from feeding engagement with said the top sheet and a movable sheet restrictor member positioned by gravity to maintain the top sheet spaced from the rotatable feed roll when the feed roll is in the retracted standby position. In a preferred embodiment the sheet feeder prints for a second pass through a printing machine.
Claims19
A sheet feeder for feeding sheets from a support platform comprising a sheet support platform, a rotatable sheet feed roll, means to reciprocally move said feed roll between a sheet feeding position wherein said feed roll is in feeding engagement with the top sheet when at least one sheet is on said support platform and a retracted standby position wherein said feed roll is retracted from feeding engagement with said top sheet, a movable sheet restrictor member positioned by gravity to maintain said top sheet spaced from said rotatable feed roll when said feed roll is in the retracted standby position.
A printing machine comprising means to form a toner image on a sheet substrate, means to heat fuse said toner image to said substrate, a paper path including means to transport said sheet substrate from a supply of sheets through said means to form and said means to heat fuse and including a sheet substrate collection tray for collecting sheet substrates having at least one fused toner image thereon, said tray having a sheet support platform and operatively associated therewith a sheet feeder for feeding said sheets having at least one fused toner image thereon, said sheet feeder comprising a rotatable sheet feed roll, means to reciprocally move said feed roll between a sheet feeding position wherein said feed roll is in feeding engagement with the top sheet when at least one sheet is on said support platform and a retracted standby position wherein said feed roll is retracted from feeding engagement with said top sheet, a movable sheet restrictor member positioned by gravity to maintain said top sheet spaced from said rotatable feed roll when said feed roll is in the retracted standby position.
Dependencies are inferred from the claim text.