Patent ID: 6021973
Filing Date: 2000-02-08
Classification: G03B,G03C

Abstract:
In combination, a take-up spool and a roll photo film, said take-up spool comprising:(A) a spool core;(B) a slit, formed in said spool core to extend in an axial direction, being open in first and second openings, and defined between first and second walls;(C) an erect plate, disposed to project from said first wall toward said second wall, extended crosswise to said axial direction, said erect plate having first and second inclined edges, confronted respectively with said first and second openings, and inclined with reference to said first wall;(D) a pair of lateral claws, disposed on respective lateral faces of said erect plate to extend in said axial direction; and(E) at least one press rib, disposed to project from said second wall toward said first wall;said roll photo film comprising:(a) a photo filmstrip having first and second ends;(b) a trailer, disposed to project from said first end, said photo filmstrip being wound in a form of a roll with said trailer wound inwards;(c) a leader, disposed to project from said second end, wound about said roll of said photo filmstrip, for preventing ambient light from being incident upon said photo filmstrip; and(d) at least one retainer hole formed in said front end of said leader, said retainer hole including:(d1) a retaining region, having a retaining edge, and engageable with said lateral claws; and(d2) a releasing region having a rectangular shape, formed with said retaining region to extend toward said photo filmstrip, and having a size for allowing passage of said lateral claws.