Photocopying – Contact printing – With scanning
Patent
1989-10-13
1991-01-22
Wintercorn, Richard A.
Photocopying
Contact printing
With scanning
355 93, G03B 2710
Patent
active
049874454
ABSTRACT:
A scanning light contact duplicating apparatus is described which includes an explosure frame having a front and rear edge between which extends a backing plate that is used for supporting an original sheet such as a negative transparency to be copied, together with a photosensitive sheet in contact with it. A transparent cover is connected to the exposure frame. Provision is also made for pressing the transparent cover toward the backing to force the original sheet (negative) into close contact with the copy sheet (photosensitive sheet). An elongated light, usually a gas or vapor lamp, is positioned parallel to the front edge of the exposure frame. The light is supported for rectilinear movement toward the rear of the exposure frame and parallel to the plane of the exposure frame. A collimator is preferably provided between the light and the exposure frame. The collimator has a honeycomb array of parallel open-ended cells, each of the cells having walls perpendicular to the exposure frame. The collimator is supported for movement with the light whereby the alignment of the light rays that pass light through the cells of the collimator reduces undercuting on the photosensitive sheet. In some forms of the invention the exposure frame is stationary and in other forms two exposure frames are mounted back-to-back and supported for 180.degree. of rotation so that material can be inserted into one exposure frame while graphic material is simultaneously exposed to the scanning light while in the adjacent exposure frame.
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Burgess Dennis A.
Campbell William J.
Saldenais Arvids
Burgess Industries Inc.
Harmon James V.
Wintercorn Richard A.
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