Film cassette and leader

Details Film cassette and leader Film cassette and leader

1992-06-29

1993-10-19

Gellner, Michael L.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 711, G03B 1726, G03B 104

Patent

active

052550400

ABSTRACT:
A film cassette comprises a lighttight housing, a spool rotatably supported inside the housing, a filmstrip wound onto the spool, a film leader attached to a leading end of the filmstrip, and a sprocket coaxially connected to the spool with identical pitch teeth adapted to be received in respective perforations along an edge section of the leader wider than the filmstrip for advancing the leader (but not the filmstrip) from the housing when the sprocket and the spool are rotated in a film unwinding direction. Among the perforations that receive the teeth the perforation closest to the filmstrip is longer than the others to allow anyone of the teeth to readily enter that perforation when the leader is wound onto the spool after the filmstrip.

REFERENCES:
patent: 1921560 (1933-08-01), Case
patent: 4455076 (1984-06-01), Birkeland
patent: 4908641 (1990-03-01), Fairman
patent: 5004176 (1991-04-01), Niedospial
patent: 5049928 (1991-09-01), Tirone

Affiliated with

Also associated with

Rating

Film cassette and leader 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 and leader, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Film cassette and leader will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1355544