Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1986-04-18
1988-04-19
Moses, R. L.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
355 5, 355 7, G03G 1500
Patent
active
047393688
ABSTRACT:
A microform reader-printer apparatus includes a viewing screen having ruler-like fiducial marks that are indicative of distance from an edge of an image frame being viewed. The apparatus includes a keyboard permitting the operator to input data to a printer control regarding the portion of the image frame which is desired to be copied by the printer. In the printing mode the portion of the image frame selected for reproduction is printed using an electrophotographic reproduction engine. An electro-static image of the image selected for reproduction is formed on a photoconductive drum by translating a pair of scanning mirrors. Means including a notched bracket movable with the scanning mirror is provided for controlling the "on" time of a projection lamp and/or corona charger so that electrostatic image formation occurs only for the portion of the image frame selected for reproduction. Adjustments to lamp "on" time are also made for different lamp brightness readings, since brighter lamps take a longer time to quench. Means are also provided for controlling lamp brightness in accordance with the exposure requirements of the portion selected for reproduction. The electrostatic image is then developed and transferred to a standard size copy sheet. The copy sheet thus includes only the image area selected for reproduction and clear areas upon which notes or comments may be written.
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Operating Instructions, 900 Page Search Reader-Printer, published Nov. 1982 by 3M.
Brown Richard E.
Holroyd Bruce A.
Lachut Eugene W.
Soucy Francis L.
Eastman Kodak Company
Moses R. L.
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