Plastic article or earthenware shaping or treating: apparatus – With direct application of magnetic force to manipulate...
Patent
1977-01-03
1979-10-23
Spicer, Jr., Robert L.
Plastic article or earthenware shaping or treating: apparatus
With direct application of magnetic force to manipulate...
425384, 425158, 425156, B29C 300
Patent
active
041719409
ABSTRACT:
Strips of photographic film are processed through a film developing machine which transports the film by means of rollers. Curling of the film around the rollers of the machine is avoided even though no separate leader is attached to the film.
This is accomplished by first inserting one end of the film strip into a device which has an open slot defined by a pair of platens which face each other. At least one platen is heated and at least one platen has corrugations in its slot-defining surface. Provisions are made for responding to insertion of the strip into the slot to close the platens upon the inserted strip, and maintaining these platens so closed for a length of time sufficient to impress the platen corrugations into the film. The slot is then reopened, the strip is withdrawn, and inserted into the nip of the input rollers to the developing machine.
Specific embodiments of the corrugating device are also taught.
REFERENCES:
patent: 3178792 (1965-04-01), Scott
patent: 3548043 (1970-12-01), Held, Jr.
patent: 3887312 (1975-06-01), Seang
patent: 4038011 (1977-07-01), Lemelson
Hope Henry F.
Hope Stephen F.
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