Negative mask unit

Details Negative mask unit Negative mask unit

1998-09-10

2000-11-21

Adams, Russell

Photocopying

Projection printing and copying cameras

Detailed holder for original

355 18, G03B 2700, G03B 2762

Patent

active

061511048

ABSTRACT:
A negative mask unit which can perform exposure from either of reference film or new-type film simply by changing the direction of insertion of the negative film. The negative mask unit has a negative film feed passage provided between a base plate and a top plate. The film feed passage is composed of first to third feed passages. A negative mask is exchangeably set between the first and third feed passages. Two sets of mask-related members necessary to process reference film (135 film) and new-type film, including a film inlet, feed means, and sensors, are provided on one and the other sides of the negative mask, respectively. One of the sets is selected and film is inserted from the side of the selected set for exposure.

REFERENCES:
patent: 4252436 (1981-02-01), Kogane
patent: 5164574 (1992-11-01), Ujiie et al.
patent: 5550613 (1996-08-01), Hasegawa et al.
patent: 5614986 (1997-03-01), Yoshikawa et al.
patent: 5767943 (1998-06-01), Oberhardt et al.
patent: 5841519 (1998-11-01), Ajimu et al.

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