Photocopying – Projection printing and copying cameras – Detailed holder for original
Patent
1982-02-18
1984-02-28
Hayes, Monroe H.
Photocopying
Projection printing and copying cameras
Detailed holder for original
G03B 2762
Patent
active
044339100
ABSTRACT:
An improved transparency holder is provided for use in supporting and positioning a transparency in a light and image projection apparatus, such as a photographic enlarger. It includes a pair of opposed carrier plates having an aperture for coaxial alignment with a light beam. Disposed therein are mask means, which are another pair of opposing apertured plates for releasably holding the transparency therebetween in coaxial alignment with the light beam. The mask means are positioned by registry pin and hole means, and releasably retained thereat by magnetic means. A cassette means also defines an aperture for coaxial alignment with the light beam and is adapted to removably receive the carrier means. Moveable wedge means are externally accessible from the cassette and cooperate with the mask means for selectively releasing the transparency for movement. Bias means within the cassette compresses the mask means to hold the transparency in clamped engagement when the carrier is in the cassette.
REFERENCES:
patent: 505331 (1893-09-01), Scouler
patent: 1885286 (1932-11-01), Petit et al.
patent: 2294585 (1942-09-01), Thomson
patent: 2369897 (1945-02-01), Hjort
patent: 2427554 (1947-09-01), Drucker
patent: 2498278 (1950-02-01), Kaplowitz
patent: 2589680 (1952-03-01), Denny
patent: 2625864 (1953-01-01), Engelhardt
patent: 3194114 (1965-07-01), Weinberg
patent: 3203311 (1965-08-01), Woodcock et al.
patent: 3288023 (1966-11-01), Lane
patent: 3288027 (1966-11-01), Ruzicka
patent: 3604328 (1971-09-01), Nakagawa
patent: 3988063 (1976-10-01), McNair et al.
patent: 4095894 (1978-06-01), Holliday
patent: 4136948 (1979-01-01), Prochnow
patent: 4161365 (1979-07-01), Anderson et al.
patent: 4188115 (1980-02-01), Marvin
patent: 4227804 (1980-10-01), Pramstraller
patent: 4241993 (1980-12-01), Guillaume
patent: 4334768 (1982-06-01), Parik
Berkey Photo, Inc.
Hayes Monroe H.
LandOfFree
Transparency holder does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transparency holder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transparency holder will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-757235