Gerber Systems Corporation

Robert V DeMartino

Alan W Menard

Ronald J Straayer

Bruce L Davidson

William J Tortora

John E Markowski, Iii

Ronald G Goulet

Nabil Mishriki

An apparatus for printing, cutting or otherwise working sheets of sheet material has a friction sheet advance mechanism and a sheet loading mechanism in advance of the feed mechanism having rows of sprocket pins cooperating with complementary rows of sprocket holes in a sheet to assure accurate insertion of a sheet into the sheet advance mechanism and subsequent accurate movement of the sheet through the advance mechanism and past a work station. A photosensor carried by the work head of the apparatus senses one side edge of the sheet as a reference for laterally positioning the work process relative to the sheet, and a transversely extending index edge of an index hole in the proof sheet is detected and used as a reference for the longitudinal positioning of the work process relative to the sheet. When working on both faces of the sheet, the same reference edges are detected and used as references for the work process on the second face as are detected and used as references for the work process on the first face so as to avoid registration errors between the two work processes.

Apparatus for working on sheets of sheet material and sheet material for

An image buffer for use with laser imagers is configured to receive image signals from a raster image processor (RIP). The image buffer comprises a two by two data switch and two memories for storing image data signals as generated by the RIP. The stored image data signals are presented to the laser imager in accordance with command signals provided by an image buffer controller. The image buffer controller utilizes a video interface that includes a SCSI controller and line buffer to reformat the stored image data signals before presentation to the laser imager, thereby allowing for independent operation of the RIP and laser imager.

Imaging system with image buffer for exposing film on a substrate

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West Hartford, CT, United States of America

Robert V DeMartino