Method and device for driving a mirror for a photographic printe

Details Method and device for driving a mirror for a photographic printe Method and device for driving a mirror for a photographic printe

1992-03-30

1993-04-13

Hayes, Monroe H.

Photocopying

Projection printing and copying cameras

With focusing or projection screen

355 43, 355 51, 355 57, 355 60, 355 65, 355 66, G03B 1328

Patent

active

052027236

ABSTRACT:
A mirror driving method, and device, for a photographic printer having a mirror diagonally movable into and out of a printing light path between a photographic film and a printing lens. The mirror is moved into the printing light path for reflecting light toward a photometric system of the photographic printer during light measurement before printing. During printing, the mirror is removed from the printing light path and is stopped at a rest position. When moving from the rest position into the printing light path, the mirror is controlled to move first at a high speed and then at a low speed. When the printer operation is interrupted for a period or terminated, the mirror is locked at a lock position which is removed from the printing light path.

REFERENCES:
patent: 3601486 (1971-08-01), Levine
patent: 3620623 (1971-11-01), Reams et al.
patent: 4457619 (1984-07-01), Takahashi et al.
patent: 4786944 (1988-11-01), Sakamoto et al.
patent: 4786949 (1988-11-01), Yamamoto
patent: 5006886 (1991-04-01), Suzuki

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