Jam detector for intermediate tray of a copying machine
AssigneeSharp Kabushiki Kaisha
InventorKazushi Yamamoto
Life of this patent
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Abstract
A jam detector for a copying machine includes an optical system with a light emitting element and a light receiving element placed above an intermediate tray for temporarily supporting copy paper after one of its sides has been processed until it is transported away to be processed for the second time. The optical system passes a light beam along the entire length of the tray in the direction of motion of the paper such that the beam is obstructed whenever a sheet is dropped from above into the tray and the jam is detected if the beam is not obstructed at regular intervals.
Claims8
In a copying machine having an intermediate tray for temporarily supporting copy paper after one side thereof has been subjected to image transferring proces until said paper is transported again to a paper feeding section of said copying machine, the improvement wherein said coping machine further comprises a jam detector with an optical system adapted to pass a light beam along the entire length of said intermediate tray in the direction of motion of said copy paper.
Dependencies are inferred from the claim text.