Other

Xerox Corporation

David M Borostyan

Stephen M Borostyan

The disclosed document feeder apparatus includes a document drive that comprises only a single line of feed rollers with a simple skew adjustment system. This drive is shown incorporated in a cassette-loaded automatic document feeder ('ADF') that is attachable to an existing independent engineering document copier in a non-intrusive manner. The cassette can be loaded, either when positioned in the ADF or at a location remote from the ADF, with a stack of large engineering documents of mixed media and varying sizes; and it is even possible for the cassette to carry a document several yards (meters) long. Documents are fed serially from the top of the stack through the ADF's document flow path by the document drive which is centered for alignment along a line positioned parallel to the document flow path. A speed control assembly, all parts of which are located within the ADF itself, adjusts the speed of the document in the ADF feed rollers to match the speed of the independent copier's constant velocity transport. The leading edge of each successive document is sensed and, if not perpendicular to the flow path, is correctly realigned by the skew adjustment system that momentarily reorients one of the ADF's in-line feed rollers to an adjustment position that is slightly out of angular alignment with the feed roller center line.

Automatic document feeder with skew control

A variable magnification copier apparatus includes an optical system which incorporates two pairs of moving mirror assemblies which are moved to maintain object and image conjugate requirements following magnification changes. Also included is a constant focal length lens movable between two segments of a folded optical path. The optical system provides a magnification range of between 0.45X and 2.0X, while positioning the optical elements in a compact design. The lens does not move along the optical path, but rather remains fixed in position along one path segment so long as magnification values are selected within a certain range. When the magnification value is selected outside the predetermined range, the lens moves to an adjacent segment of the optical path and remains in a second, fixed position so long as further magnification values are selected within a second range. When a range is selected outside the second range, the lens is moved back to the first position.

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Rochester, NY, United States of America

David M Borostyan