Photocopying – Contact printing – Machine
Patent
1976-06-25
1977-11-01
Griffin, Donald A.
Photocopying
Contact printing
Machine
355 29, G03B 2900, G03B 2704
Patent
active
040563219
ABSTRACT:
The duplicator comprises a housing with a carrier supporting first and second spaced platens alternately movable by the carrier to a light exposure station in the housing. Master microfiches to be duplicated are manually positioned on the platens such that when a master microfiche on the first platen is in the housing being exposed, a second master microfiche may be loaded on the second platen, preparatory to having a duplicate made. A foot pedal is provided to actuate movement of the platen carrier and also control a vacuum hold down system for the master microfiches positioned on the platens. A capstan driven by a geneva movement in the housing positions successive lengths of film from a film reel in the housing at the light exposure station for contact printing with the master microfiche on the platen positioned at the light exposure station. A pivoted pair of rollers exert a tension bias on film from the reel to the capstan to maintain it taut and also provide an arrangement whereby the resistance to pulling movement of the successive lengths of film by the capstan is always the same for each successive length independently of the amount of film on the supply reel in the housing.
REFERENCES:
patent: 1481472 (1924-01-01), Lamphier
patent: 2607264 (1952-08-01), Gazza
patent: 2933030 (1960-04-01), Bornemann
patent: 3252370 (1966-05-01), Luther
patent: 3535039 (1970-10-01), Lakin et al.
patent: 3600089 (1971-08-01), Walter
patent: 3836252 (1974-09-01), Touchette et al.
Gensike Karl H.
Marsh Robert C.
Reinhard John D.
Dymat Photomatrix Corporation
Griffin Donald A.
Pastoriza Ralph B.
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