Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1986-04-03
1987-12-15
Prescott, A. C.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
355 3R, 355 14R, 355 14E, 271 31, 271227, G03G 1500
Patent
active
047136740
ABSTRACT:
Exposure device for originals comprising an endless conveyor path for passing an original repeatedly through an exposure zone either by continuously conveying the original in one direction through the endless path or by conveying that original successively in opposite direction through the endless path. Detectors are provided for selecting the appropriate conveying by measuring the length of a original introduced into the path. When it is determined that the length of original is smaller than a predetermined value smaller than the length of the endless path, or is larger than the endless path, the original after being exposed is conveyed in an opposite direction, past the exposure zone until it reaches the initial exposure situation again. When it is determined that the length of an original introduced is between said predetermined value and the length of the endless path, the original is conveyed continuously in the same direction for carrying out a succession of exposures. The predetermined value is set so that an original, irrespective of its length, will be exposed in the fastest succession.
REFERENCES:
patent: 4478405 (1984-10-01), Eertink et al.
patent: 4538905 (1985-09-01), Griego et al.
patent: 4568181 (1986-02-01), Nishiyama
patent: 4579444 (1986-04-01), Pinckney et al.
patent: 4585332 (1986-04-01), Shenoy
patent: 4634263 (1987-01-01), Miwa
patent: 4634265 (1987-01-01), Tada
Giezeman Paulus G.
Romualdus Ter Horst Gerhardus E.
Oce'-Nederland, B.V.
Prescott A. C.
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