Patent ID: 6447177
Filing Date: 2002-09-10
Classification: G03B

Abstract:
A spool lock member incorporated in a photo film cassette, for preventing a spool from rotating when a rotatable cassette shutter is in a closed position to close a photo film passageway, said spool lock member comprising:a base portion; a first arm, extending from said base portion toward said cassette shutter, for shifting in a first direction in response to rotation of said cassette shutter toward said closed position; a second arm, extending from said base portion toward said spool, for blocking rotation of said spool by shifting in said first direction with said first arm; first and second end portions of respectively said first and second arms, having a greater width or thickness than an interval between said first and second arms, and prevented from accidental entry between said first and second arms of another spool lock member before being assembled.