Sheet feed apparatus
AssigneeHoechst Aktiengesellschaft
InventorHermann Idstein
Life of this patent
Estimating the term…
Abstract
Disclosed is a sheet feed apparatus suitable for feeding an original into a copying machine at an intake position and through the machine past an exposure station, the apparatus comprising a rotary support having a surface for supporting the original, means rotatable with the rotary support for gripping the leading edge of the original, means for selectively coupling and decoupling the gripping means with the support, means in advance of the exposure station for pressing the original against the supporting surface, means associated with the rotary support for conveying the original in contact with the supporting surface when the gripping means is stationary and means for releasing the original from the gripping means at a discharge position after the support has made a predetermined number of revolutions.
Claims28
A sheet feed apparatus suitable for feeding an original into a copying machine at an intake position and through the machine past an exposure station, said apparatus comprising a rotary support having a surface for supporting the original, means selectively rotatable with said rotary support and including selectively closable jaws for gripping the leading edge of the original, means for selectively coupling and decoupling said gripping means for rotation with said support, means in advance of the exposure station for pressing the original against the supporting surface, means associated with said rotary support for conveying the orginial in contact with said supporting surface when the gripping means is stationary, and means for releasing the original from the gripping means for releasing the original from the gripping means at a discharge position after the support has made a predetermined number of revolutions, whereby multiple revolutions of an original and particularly one which is longer than the surface of the rotary support are possible.
A sheet feed apparatus suitable for feeding an original into a copying machine at an intake position and through the machine past an exposure station, said apparatus comprising a rotary support having a surface for supporting the original, means rotatable with said rotary support for gripping the leading edge of the original, means for selectively coupling and decoupling said gripping means with said support, means in advance of the exposure station for pressing the original against the supporting surface, means associated with said rotary support for conveying the original in contact with said supporting surface when the gripping means is stationary, and means for releasing the original from the gripping means at a discharge position after the support has made a predetermined number of revolutions, wherein said rotary support is a drum mounted on a drive shaft and wherein said gripping means comprises one arm mounted on the drive shaft adjacent to each of the end faces of the drum and a gripper bar connected between said arms, and wherein said coupling and decoupling means is electrically operated and includes means for breaking said gripping means upon decoupling.
A sheet feed apparatus suitable for feeding an original into a copying machine at an intake position and through the machine past an exposure station, said apparatus comprising a rotary support having a surface for supporting the original, means rotatable with said rotary support for gripping the leading edge of the original, means for selectively coupling and decoupling said gripping means with said support, means in advance of the exposure station for pressing the original against the supporting surface, means associated with said rotary support for conveying the original in contact with said supporting surface when the gripping means is stationary, means for releasing the original from the gripping means at a discharge position after the support has made a predetermined number of revolutions, a movable feed table for advancing the original toward the rotary support, a pivotable stop mounted in advance of the table for aligning the leading edge of the original, a first switch positioned to be actuated by the leading edge of the original as it is advanced toward the rotary support, suction nozzles in said feed table, a second switch associated with said apparatus, and means for applying suction to the nozzles responsive to actuation of said second switch.
Dependencies are inferred from the claim text.