Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1988-11-29
1990-02-20
Levy, Stuart S.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
2421251, G03B 2132
Patent
active
049019368
ABSTRACT:
A cylindrical core 1 for receiving windings of a photographic film web comprises a hub 3 having an axial re-entrant channel and an insert 4 fitting into and engaging shoulders 13, 16 of that channel to define with the channel a slot 26 for receiving an end of a film web 2. Cooperating detent elements 19, 25 are provided for resisting relative axial movement between the hub 3 and the insert 4 when the latter is inserted into the channel 11, and the insert 4 incorporates teeth 24 for engaging at least one marginal perforation of a film web to prevent circumferential slippage of the film web. The slot 26 is inclined obliquely from a radial direction, and the teeth 24 are located on the inner or lower wall thereof so that the film perforations are released from the teeth when the film end is tensioned at the end of unwinding.
REFERENCES:
patent: 3361380 (1968-01-01), Mizutani
patent: 4506843 (1985-03-01), Luhrig et al.
patent: 4750683 (1988-06-01), Schoettle et al.
patent: 4809923 (1989-03-01), Adriaensen et al.
Buelens Edward
De Smedt Roger F.
Muylle Wilfried E.
AGFA-GEVAERT N.V.
Daniel William J.
duBois Steven M.
Levy Stuart S.
LandOfFree
Core for film spool does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Core for film spool, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Core for film spool will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1610629