Advancing material of indeterminate length – With material-responsive control means – To regulate longitudinal movement of material
Patent
1977-06-21
1979-02-27
Schacher, Richard A.
Advancing material of indeterminate length
With material-responsive control means
To regulate longitudinal movement of material
226 35, 226119, B65H 1742
Patent
active
041414802
ABSTRACT:
A friction driving device for film developing machines which comprises a number of side-by-side film supporting roller members each consisting of a cylindrical body provided with equally spaced apart flanges defining therebetween a driving surface, and a driving roller member. The supporting rollers are so arranged as to contact the driving roller upon a drawing action exerted on the film. The driving roller member comprises a sequence of equally spaced apart cylindrical body portions of larger diameter with alternately equally spaced apart cylindrical body portions of smaller diameter having width approximately equal to the width of the driving surface of the supporting rollers and an outside diameter smaller than the diameter of the cylindrical body diameter of the driving surface of the supporting rollers. The driving roller is arranged so that each larger cylindrical body portion faces the driving surface on the supporting roller and each cylindrical body portion of smaller diameter faces the adjacent flanges of two side-by-side supporting roller members.
REFERENCES:
patent: 3575100 (1971-04-01), Krause
patent: 3827646 (1974-08-01), Nielsen
O.M.A.C. Caprara S.a.s.
Schacher Richard A,.
VanOphem Remy J.
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