Multi-pitch film leader card

Details Multi-pitch film leader card Multi-pitch film leader card

1987-07-16

1988-04-19

Mathews, A. A.

Optics: motion pictures

Removable film strip magazine type

352235, 226 92, 226170, G03D 313, G03B 156

Patent

active

047393572

ABSTRACT:
A film leader card has a series of holes for receiving the projections on a succession of endless timing belts in a film processor to advance the card and an attached filmstrip through the processor. A middle-most hole in the series of holes is spaced relative to an adjacent hole in the series to match the pitch of the projections. Each of the holes in the series forward of the middle-most hole has a pitch slightly greater than the pitch of the projections. Each of the holes in the series rearward of the middle-most hole has a pitch slightly less than the pitch of the projections. Consequently, the leader card is projection-driven only at its middle-most hole since the projections received in the forward and rearward holes are substantially clear of any contact with the edges of those holes. This clearance between the forward and rearward holes and the projections facilitates transfer of the leader card from one timing belt to another timing belt in the film processor.

REFERENCES:
patent: 1561941 (1925-06-01), Merle
patent: 3499706 (1965-12-01), Hanson et al.
patent: 4047615 (1977-09-01), Jansen
patent: 4222657 (1980-09-01), Leuchter
patent: 4295713 (1981-10-01), Edwards
patent: 4613221 (1986-09-01), Takase et al.

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