Film winding member

Details Film winding member Film winding member

1986-09-24

1987-10-13

Gellner, Michael L.

G03B 104

Patent

active

046994890

ABSTRACT:
A film winding member for a camera includes a lower disposed portion of widened diameter for initial contact with the leading end of the film. Both the widened diameter portion and the relatively narrower remainder of the film winding member present uninterruptedly smooth and continuous surfaces about which the film is operatively wound. The peripheral surface of the film winding member is formed of a material having a coefficient of sliding friction or at least 1.5, and preferably of silicone rubber having such a coefficient of sliding friction.

REFERENCES:
patent: 1386617 (1921-08-01), Gunderman
patent: 2078432 (1937-04-01), Whitlock
patent: 2911163 (1959-11-01), Warrick
patent: 3465657 (1969-09-01), Welzel et al.
patent: 3484053 (1969-12-01), Rehn et al.
patent: 3493161 (1970-02-01), Billings et al.
patent: 3499376 (1970-03-01), Swift
patent: 4274726 (1981-06-01), Yoneyama et al.
patent: 4310233 (1982-01-01), Okuyama et al.
Mechanical Engineer's Handbook, Ed. by Lionel S. Marks, McGraw-Hill Co., N.Y., N.Y., 1951, p. 728, (Marks' Handbook).

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