Photographic printer

Details Photographic printer Photographic printer

1998-02-12

1999-12-14

Rutledge, D.

Photocopying

Projection printing and copying cameras

Illumination systems or details

355 54, G03B 2772

Patent

active

060024682

ABSTRACT:
A film drive mechanism for varying the size and configuration of an aperture in a riser block of a photographic printer. The aperture is defined by a plurality of plates positioned in surrounding relation to the aperture and having tongue and groove edges slidably abutting tongue and groove edges of adjacent plates. A stepper motor is provided in association with each plate to individually power the plate in an X or Y direction with the plate being free to move in its unpowered direction. The size and configuration of the aperture is adjusted by individual adjustment of the plates utilizing the individual stepper motors with the individual movement of each plate constituting powered movement in a first direction accompanied by unpowered yielding movement of an adjacent plate against which the powered plate pushes.

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