Method and apparatus for producing roll photo film

Details Method and apparatus for producing roll photo film Method and apparatus for producing roll photo film

1997-09-04

2000-06-27

Walsh, Donald P.

Winding, tensioning, or guiding

Unwinding and rewinding a machine convertible information...

Cartridge system

2423324, 2423328, 2425326, 2425327, G03B 2302, G11B 23107

Patent

active

060796545

ABSTRACT:
A roll photo film includes a spool which has a cylindrical core. A light-shielding sheet has a front end portion and a rear end portion. The front end portion is secured to the core. A first end of a photo filmstrip is secured to one securing position on the light-shielding sheet. The photo filmstrip is wound about the core in a roll form with the light-shielding sheet. A roll photo film producing apparatus includes a punch/die set, which has a trimming punch and a trimming die, and trims the rear end portion with a reduced width. A hole-forming punch and a hole-forming die are incorporated in the punch/die set, and cut a retaining hole through the rear end portion simultaneously with trimming of the rear end portion.

REFERENCES:
patent: 3586258 (1971-06-01), Horlezeder
patent: 5462240 (1995-10-01), Esaki et al.
patent: 5465920 (1995-11-01), Merle et al.
patent: 5595353 (1997-01-01), Glover et al.
patent: 5605303 (1997-02-01), Glover et al.
patent: 5632452 (1997-05-01), Takahashi et al.

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