Image forming apparatus with magnification changing device

Details Image forming apparatus with magnification changing device Image forming apparatus with magnification changing device

1988-01-26

1989-01-03

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Focus or magnification control

G03B 2734, G03B 2740, G03B 2770

Patent

active

047960590

ABSTRACT:
An image forming apparatus with a magnification changing mechanism for an optical system wherein a first carriage carrying a lamp and a mirror for scanning an image of a document, a second carriage adapted to run in the same direction but at a half speed of the first carriage and carrying a V-mirror, and a lens for projecting the image of the document are provided. A V-mirror position changing device includes a block carriage disposed at an end of a closed loop wire for driving the first and second carriages, and a stationary block disposed on a body frame in a manner to correspond to adjoining blocks disposed on the block carriage. The wire is made to run on the blocks of the block carriage and the stationary block, and the terminal end of the wire is fixed on the block carriage.

REFERENCES:
patent: 4355883 (1982-10-01), Landa
patent: 4494866 (1985-01-01), Rattin et al.
patent: 4538903 (1985-09-01), Lane
patent: 4538904 (1985-09-01), Lane
patent: 4561770 (1985-12-01), Yamaguchi et al.
patent: 4629310 (1986-12-01), Landa et al.

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