Method of making light-trapping members for photographic film cassette
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United States of America Patent
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-
Aug 23, 1994
Grant Date -
N/A
app pub date -
Apr 21, 1993
filing date -
Apr 21, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
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Cited Art Landscape
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