Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1990-04-09
1991-09-10
Stodola, Daniel P.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
354275, G03B 100
Patent
active
050466828
ABSTRACT:
In a film cassette, a pair of flanges are coaxially arranged along a spool core to normally radially confine a filmstrip coiled about the spool core to prevent the filmstrip from uncoiling against an interior curved wall of the cassette shell. When the spool core is rotated to unwind the filmstrip, a stripper is received between a leading film section and the next-inward convolution of the filmstrip to induce the leading section to flex the flanges farther apart to escape the confinement of the flanges and be thrust through a lighttight passageway to the exterior of the cassette shell. According to the invention, several film supporting ribs severely limit the extent to which the leading film section will be uncoiled from between the flanges to assure the leading section maintains sufficient longitudinal rigidity to facilitate its being thrust through the lighttight passageway.
REFERENCES:
patent: 3447759 (1969-06-01), Rau
patent: 3892370 (1975-07-01), Nelson
patent: 4407579 (1983-10-01), Huff
patent: 4423943 (1984-01-01), Gold
patent: 4744527 (1988-05-01), Coote et al.
patent: 4787513 (1988-11-01), Auble et al.
patent: 4834306 (1989-05-01), Robertson et al.
patent: 4846418 (1989-07-01), Fairman
patent: 4848693 (1989-07-01), Robertson
patent: 4883235 (1989-11-01), Niedospial, Jr.
patent: 4883236 (1989-11-01), Niedospial, Jr. et al.
patent: 4887113 (1989-12-01), Niedospial, Jr.
patent: 4899948 (1990-02-01), Niedospial, Jr. et al.
patent: 4903053 (1990-02-01), Harvey
Darling John P.
Eastman Kodak Company
Fields Roger A.
Stodola Daniel P.
LandOfFree
Film 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 cassette, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Film cassette will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-534502