Film cassette with non-protruding film leader

Details Film cassette with non-protruding film leader Film cassette with non-protruding film leader

1992-05-26

1993-10-12

Jillions, John M.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

354275, G03B 1726

Patent

active

052518400

ABSTRACT:
In a film cassette, a spool is supported for rotation in an unwinding direction inside a cassette shell, a filmstrip is coiled about the spool to form a roll with an outermost film convolution that is a nonprotruding leader, and a stripper is located substantially adjacent a passageway to the exterior of the shell for receipt between a leading edge of the leader and a next-inward film convolution of the roll to divert the leading edge into the passageway when the spool is rotated in the unwinding direction. According to the invention, the leading edge of the leader is inclined at one angle rearwardly from its center point on a longitudinal centerline of the filmstrip towards one longitudinal edge of the filmstrip relatively remote from the stripper and is inclined at another angle forwardly from the centerpoint towards another longitudinal edge of the filmstrip relatively close to the stripper. This arrangement facilitates advancement of the leading edge into and through the passageway.

REFERENCES:
patent: 4887112 (1989-12-01), Niedospial, Jr. et al.
patent: 5046681 (1991-09-01), Niedospial
patent: 5046682 (1991-09-01), Niedospial
patent: 5178340 (1993-01-01), Niedospial

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