Apparatus for treatment of webs of photographic material

Advancing material of indeterminate length – By orbitally traveling material-engaging surface – Including details of roll or mount

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Details

226194, 226195, B65H 2002, B65H 2314

Patent

active

046389369

ABSTRACT:
A web of photographic paper is trained over several rollers so that it can be advanced along a meandering path through successive chambers in a developing machine. At least one of the rollers is mounted on a driven shaft with the interposition of a coupling which engages the shaft with the roller when the tension of the running web which is trained over such roller exceeds a certain value. The roller is normally held against rotation under the action of the web and/or under the action of the bearing which is rotatable on the shaft and yieldably maintains the roller in a position of coaxiality with the shaft. A braking device for holding the roller against rotation has a first plastic ring which is rotatably mounted on the shaft and is connected to or made integral with the bearing for the roller, and a second plastic ring which surrounds and is in frictional engagement with the first ring. The second ring is held against rotation with the first ring by a partition or by another stationary part of the machine.

REFERENCES:
patent: 486174 (1892-11-01), Allis
patent: 1189611 (1916-07-01), Morse
patent: 2166243 (1939-07-01), Elvin
patent: 2726828 (1955-12-01), Pashkow
patent: 3197153 (1965-07-01), Davidson
patent: 3369765 (1968-02-01), Jensen
patent: 3561660 (1971-02-01), Nicol et al.
patent: 3703263 (1972-11-01), Hunter
patent: 3746142 (1973-07-01), Hepp et al.
patent: 4134663 (1979-01-01), Laar et al.

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