Film cassette with tri-lobe spool

Details Film cassette with tri-lobe spool Film cassette with tri-lobe spool

1991-01-14

1992-05-05

Gellner, Michael L.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 711, G03B 1726

Patent

active

051112299

ABSTRACT:
A film cassette comprises a film spool supported within a lighttight shell for rotation to thrust a filmstrip coiled about the spool to the exterior of the shell whether the filmstrip is unexposed or is only partly exposed, and a film exposure status indicator secured to the spool for rotation from an unexposed position for providing a visible indication the filmstrip is unexposed to respective partly exposed and fully exposed positions for providing visible indications the filmstrip is only partly exposed and is substantially exposed. According to the invention, the spool includes a coaxial opening in which is located integral one-way access means having different rotational orientations when the status indicator is in its unexposed, partly exposed and fully exposed positions for allowing various only one-way access to the coaxial opening corresponding to the respective positions of the status indicator, in order to engage and rotate the spool.

REFERENCES:
patent: 5047794 (1991-09-01), Pagano et al.
patent: 5048770 (1991-09-01), Baxter et al.
patent: 5049912 (1991-09-01), Pagano et al.
patent: 5049913 (1991-09-01), Pagano et al.

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