Photocopying – Projection printing and copying cameras – Detailed holder for photosensitive paper
Patent
1975-12-31
1977-07-12
Griffin, Donald A.
Photocopying
Projection printing and copying cameras
Detailed holder for photosensitive paper
G03B 2758
Patent
active
040350762
ABSTRACT:
A photographic copying machine wherein the leader of a fresh web of photographic paper is automatically threaded through a copying station and thereupon through one or more additional stations whereby the leader advances along an elongated path which is defined by stationary and pivotable guide members. Each pivotable guide member is movable by an electromagnet between an operative position in which it overlies at least a portion of an opening provided by the adjacent stationary guide member or members and an inoperative position in which the respective opening is exposed. Pivotable guide members are provided at a copying station where the web is exposed to printing light and at a feeding station where the web can form one or more loops in a suitable magazine when the respective pivotable guide member is moved to its inoperative position. One or more pivotable guide members can be yieldably retained in the respective operative positions by elastic or yieldably mounted locking bolts at least one of which can be disengaged from the respective pivotable guide member by an electromagnet or in response to the application of a predetermined force which acts against the respective pivotable guide members in a direction to move it to the inoperative position.
REFERENCES:
patent: 1981406 (1934-11-01), Young
patent: 3369449 (1968-02-01), Klauss et al.
patent: 3414353 (1968-12-01), Schwardt
patent: 3712732 (1973-01-01), Lederer
Dreher Karl
Fleck Adolf
Gotze Christian
Heidrich Gunther
Agfa-Gevaert Aktiengesellschaft
Griffin Donald A.
Striker Michael J.
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