Photocopying – Contact printing – Light boxes
Patent
1977-09-08
1979-04-03
Evans, F. L.
Photocopying
Contact printing
Light boxes
355 1, G02B 702
Patent
active
041474120
ABSTRACT:
A bar lens array is mounted between an original document and a photoconductive member in such a manner that the ends of the bar lenses are equally spaced from the document and photoconductive member regardless of manufacturing differences in the length of the bar lenses of the array. Reference marks may be provided at the center of the bar lens array and at a point halfway between the document and photoconductive member which are aligned with each other. The bar lens array may be mounted in a sleeve which compensates for the length of the bar lenses. In this embodiment, a stopper is provided at a fixed distance from one of the document or photoconductive member. The distance C from one end of the bar lens array to a point on the sleeve adapted to align with the stopper is C=(D-L)/2-K where D is the distance between the document and the photoconductive member, L is the length of the bar lens array and K is the distance from the stopper to the one of the document or photoconductive member.
REFERENCES:
patent: 3947115 (1976-03-01), Hamaguchi
patent: 3955888 (1976-05-01), Kakiuchi et al.
patent: 3977761 (1976-08-01), Kawazu et al.
patent: 3977777 (1976-08-01), Tanaka et al.
Kawamura Atsushi
Kawazu Motoaki
Evans F. L.
Jordan Frank J.
Ricoh & Company, Ltd.
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