Photocopying – Projection printing and copying cameras – Step and repeat
Patent
1987-02-27
1987-11-24
Wintercorn, Richard A.
Photocopying
Projection printing and copying cameras
Step and repeat
269 57, 355 73, G03B 2742
Patent
active
047084650
ABSTRACT:
A position detecting device usable in an exposure apparatus for transferring an image of a first object onto a second object, for detecting the position of at least one of the first and second objects, includes a rotatable portion having a carrying portion for carrying thereon the at least one object, a first supporting member for supporting the rotatable portion, the first supporting member including a first driving system for moving the rotatable portion in a rotational direction, second supporting member for supporting the first supporting member, the second supporting member including a second driving system for moving the first supporting member in a rotational direction, and a displacement detecting system for detecting displacement of the first supporting member.
REFERENCES:
patent: 3651401 (1972-03-01), Cooney
patent: 3930684 (1976-01-01), Lasch, Jr. et al.
patent: 4278348 (1981-07-01), Funk et al.
patent: 4376581 (1983-03-01), Mayer
patent: 4669866 (1987-06-01), Phillips
patent: 4669867 (1987-06-01), Uda et al.
Isohata Junji
Matsushita Koichi
Yamamoto Hironori
Canon Kabushiki Kaisha
Wintercorn Richard A.
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