Plastic article or earthenware shaping or treating: apparatus – Projection
Patent
1978-08-21
1982-02-02
Hartary, Joseph W.
Plastic article or earthenware shaping or treating: apparatus
Projection
425152, 425156, 425167, 425396, G03D 308, B29C 300
Patent
active
043136680
ABSTRACT:
A coiled roll of film, which exhibits curling, is provided with longitudinal corrugations at its leading edge by a film processing apparatus, thereby providing a straight film edge well adapted for insertion into a film development machine without requiring the use of a separate leader. In the film processing apparatus, which comprises a pair of grooved, horizontally opposed platens which, upon insertion of a film therebetween, contact each other, impressing corrugation into the film, and then automatically retract to permit removal of the worked film edge from between the platens, a safety switch is provided to enable retraction of the platens, should automatic retraction not occur, to assure that the film end may be removed from the apparatus after it has been worked without being damaged.
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Hope Henry F.
Hope Stephen F.
Hartary Joseph W.
Mathews Alan
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