Method of making light-trapping members for photographic film ca

Details Method of making light-trapping members for photographic film ca Method of making light-trapping members for photographic film ca

1993-04-21

1994-08-23

Gray, David M.

Plastic and nonmetallic article shaping or treating: processes

Outside of mold sintering or vitrifying of shaped inorganic...

Including plural heating steps

26106, 28159, 264103, 425322, 428 92, 242 711, B29C 5314, D04H 1100, D06C 1300, G03B 1726

Patent

active

053411889

ABSTRACT:
Light-trapping members are cut out of a ribbon consisting of a base fabric and piles. The piles of the ribbon are pressed against the peripheral surface of a thermal drum to be inclined in the width direction after the ribbon is passed through and twisted by a twister disposed close to the thermal drum. The light-trapping members with inclined piles are attached to a film passage mouth of a self-advancing-type photographic film cassette with the inclination of the piles directed to the outside of the film passage mouth, so that the leading end of a photographic film can be advanced smoothly by rotation of a spool through the light-trapping members to the outside of the cassette.

REFERENCES:
patent: 3920372 (1975-11-01), Katagi
patent: 5234176 (1993-08-01), Mizuno

Affiliated with

Also associated with

Rating

Method of making light-trapping members for photographic film ca does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of making light-trapping members for photographic film ca, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making light-trapping members for photographic film ca will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-506271