Document exposure apparatus

Photocopying – Projection printing and copying cameras – Copying both sides of original

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Details

271195, G03B 2732

Patent

active

044418060

ABSTRACT:
Document exposure apparatus for a document copier is disclosed. Selectively, either the front or both sides of a document may be copied. Automatic transport apparatus first passes the document by a first optical scanning station from which signals representative of the front side of the document are obtained by a scanner. The document is then transported so as to engage a rotating drum. When only front side copying is desired, fingers of a solenoid actuated gate remove the document from the drum after a partial revolution is made and the document is passed to a receiving tray. When it is desired to copy both sides of a document, the gate is first lifted from the drum allowing the document to continue rotation with the drum so as to present the back side of the document, with the document traveling in the opposite direction, to a second scanning station to which the scanner has now moved, for copying the back side of the document. The document then travels with the drum to the gate the second time at which instance the gate has been lowered to the drum so that this time the document is removed from the drum and the document is then passed to the receiving tray.

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patent: 4319833 (1982-03-01), Hidding

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