Lens supporting assembly

Details Lens supporting assembly Lens supporting assembly

1995-09-13

1997-07-08

Grimley, Arthur T.

Photocopying

Projection printing and copying cameras

Focus or magnification control

359827, 2481781, G03B 2740

Patent

active

056467141

ABSTRACT:
A lens supporting assembly for use in a photoprinting machine can position a varifocal lens with high accuracy over a long period time. A lens plate carrying a varifocal lens has bent portions along both side edges and is formed with a plurality of positioning holes. A lens support table has positioning pins adapted to be engaged in the positioning holes. It is further provided with first magnets for attracting the bottom of the lens plate and a second magnet for attracting one of the bent portions. By lowering the lens plate onto the lens support table, the positioning pins engage in the positioning holes, so that the varifocal lens can be set in position with high accuracy. In this state, the first magnets attract the bottom of the lens plate, while the second magnet attracts the bent portion, so that the varifocal lens can be stably held in position.

REFERENCES:
patent: 4647187 (1987-03-01), Zahn et al.
patent: 5246192 (1993-09-01), Aberi et al.
patent: 5329337 (1994-07-01), Yamamoto et al.
patent: 5465126 (1995-11-01), Fukuda

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