Patent ID: 6367727
Filing Date: 2002-04-09
Classification: G03B,G03C

Abstract:
An apparatus for producing a roll photo film, including a conveying path through which a front end of a light-shielding sheet is advanced, said light-shielding sheet having one securing position determined thereon to which a first end of a photo filmstrip is secured, a spool holder for supporting a spool, said spool having a core to which said front end of said light-shielding sheet from said conveying path is secured, a winder unit for rotating said spool on said spool holder in a winding direction, to wind said photo filmstrip and said light-shielding sheet about said core for obtaining said roll photo film, said roll photo film producing apparatus comprising:a tension applying unit, disposed in said conveying path, for applying back tension of 70-130 grams to said light-shielding sheet, while said spool is rotated in said winding direction.