Photocopying – Projection printing and copying cameras – Methods
Patent
1984-01-06
1985-07-09
Wintercorn, Richard A.
Photocopying
Projection printing and copying cameras
Methods
331845, 355 71, 355 73, 355 76, G03B 2732
Patent
active
045278890
ABSTRACT:
A pair of thin panel members are provided having registry posts mounted thereon comprising thin discs punched from a panel sheet. The registry posts are snugly received in registry apertures of the same size formed in remote marginal portions of a film sheet or panel sheet portions tape attached to remote marginal edges of a film sheet and the panel members may then be pressure-sensitive tape applied to the open back of a camera used for copy work. The film sheet may then be exposed, removed from the registry posts and then developed. A second film sheet may thereafter be mounted on the camera back and partially exposed through a contact screen disposed thereover. The contact screen may then be removed and the developed film sheet then may again be mounted on the camera back over the exposed second film sheet through utilization of the registry posts so that the developed film sheet will be in exact registry with the exposed film sheet retained on the camera back. Thereafter, the camera back may be closed and the partially exposed second mentioned film sheet may be further exposed through the developed film sheet after which both film sheets may be removed from the camera and the second film sheet may be developed and have prints made therefrom. A cover panel portion is provided for each post and serves to protect the contact screen.
REFERENCES:
patent: 2473023 (1949-06-01), Gelb
patent: 2574392 (1951-11-01), Huebner
patent: 3506350 (1970-04-01), Denner
patent: 3577856 (1971-05-01), Updegraff
patent: 3597077 (1971-08-01), Dorn
patent: 3758206 (1973-09-01), Inoue
patent: 3974582 (1976-08-01), Jantzen, Jr.
patent: 4080068 (1978-03-01), Madigan et al.
patent: 4426152 (1984-01-01), Sakamoto et al.
Jacobson Harvey B.
Wintercorn Richard A.
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