Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1990-01-12
1991-09-10
Stodola, Daniel P.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
354275, G03B 1726
Patent
active
050466798
ABSTRACT:
In a film cassette, a film spool comprises a spool core supported for rotation in an unwinding direction to thrust a leader section of a filmstrip coiled about the spool core from the cassette and in a winding direction to return the leader to the cassette, and a pair of flanges positioned along the spool core to overlie opposite sides of the film roll. The flanges have respective central openings through which the spool core axially extends to normally permit each of the flanges to be independently rotated relative to the spool core in the unwinding and winding directions. According to the invention, the spool core includes a core piece connected to a remaining portion of the spool core for limited movement within the central opening of one of the flanges, away from the remaining portion, to engage the flange to rotate the flange in unity with the spool core when the spool core is rotated in the unwinding direction, to improve the ability of the film spool to thrust the leader from the cassette, and toward the remaining portion, to disengage the flange to permit the flange to be independently rotated when the spool core is rotated in the winding direction.
REFERENCES:
patent: 988341 (1911-04-01), Hill
patent: 1973457 (1934-09-01), Wittel
patent: 2336278 (1943-12-01), Mihalyi
patent: 2360255 (1944-10-01), Mihalyi
patent: 2364381 (1944-12-01), Mihalyi
patent: 2521932 (1950-09-01), Mihalyi et al.
patent: 2541476 (1951-02-01), Mihalyi
patent: 2552200 (1951-05-01), Mihalyi
patent: 3234024 (1966-02-01), Leinonen
patent: 3659799 (1972-05-01), Cerutti et al.
patent: 3677499 (1972-07-01), Wangerin
patent: 3797777 (1974-03-01), Hosono et al.
patent: 4407579 (1983-10-01), Huff
patent: 4423943 (1984-01-01), Gold
patent: 4488796 (1984-12-01), Edwards
patent: 4846418 (1989-07-01), Fairman
Bush Bradley S.
Wolf Michael T.
Yokajty Joseph E.
Eastman Kodak Company
Fields Roger A.
Nguyen John Q.
Stodola Daniel P.
LandOfFree
Film thrusting cassette does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Film thrusting cassette, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Film thrusting cassette will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-534472