Photographic film cassette having film guide members and light-s

Details Photographic film cassette having film guide members and light-s Photographic film cassette having film guide members and light-s

1993-01-28

1994-06-07

Stodola, Daniel P.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

G03B 1726

Patent

active

053182383

ABSTRACT:
A photographic film cassette has two light trapping fabric pieces having pile threads, attached to respective upper and lower surfaces of the film passageway for trapping light. A ridge is formed on an inner surface of the cassette body for preventing the film from loosening. A ridge extended portion extends from the ridge toward the film passage mouth along the upper surface. The inclined portions are formed on both inner surfaces of the film passageway. The film leader is guided so as to be substantially between both fabric pieces during a film advance. A mechanism also is provided for shielding light in the passage through gaps between bottoms of the pile threads. In a further preferred embodiment, a recess is formed on the upper surface so that the lower surface is arranged in a position that is shifted upwardly by an amount corresponding to a depth of the recess, which reduces an angle at which light impinges on the coiled film. In yet another preferred embodiment, stepped portions or inclined portions are formed on the upper and lower surfaces. In a still further preferred embodiment, lateral walls of the film passageway are widely spaced near the film passage mouth to shield light in gaps beside the fabric pieces.

REFERENCES:
patent: 2336278 (1943-12-01), Mihalyi
patent: 2360255 (1944-10-01), Mihalyi
patent: 2364381 (1944-12-01), Mihalyi
patent: 2521935 (1950-09-01), Monroe
patent: 2552200 (1951-05-01), Mihalyi
patent: 3128058 (1964-04-01), Ringle et al.
patent: 3467340 (1969-09-01), Rosenburgh
patent: 3556435 (1971-01-01), Wangerin
patent: 3627229 (1971-12-01), Wangerin
patent: 3627230 (1971-12-01), Wangerin
patent: 3677499 (1972-07-01), Wangerin
patent: 3797777 (1974-03-01), Hosono et al.
patent: 3945584 (1976-03-01), Mangan
patent: 4380382 (1983-04-01), Engelsmann et al.
patent: 4482232 (1984-11-01), Engelsmann et al.
patent: 4730778 (1988-03-01), Akao et al.
patent: 4832275 (1989-05-01), Robertson
patent: 4834306 (1989-05-01), Robertson et al.
patent: 4846418 (1989-07-01), Fairman
patent: 4875637 (1989-10-01), Beach
patent: 4887113 (1989-12-01), Niedospial, Jr.
patent: 4928826 (1990-05-01), Shibaraki et al.
patent: 4962401 (1990-10-01), Takahashi
patent: 5003334 (1991-03-01), Pagano et al.
patent: 5031853 (1991-07-01), Jensen
patent: 5040739 (1991-08-01), Wolf et al.
patent: 5046679 (1991-09-01), Wolf et al.
patent: 5046681 (1991-09-01), Niedospial
patent: 5048770 (1991-09-01), Baxter et al.
patent: 5219128 (1993-06-01), Mizuno

Affiliated with

Also associated with

Rating

Photographic film cassette having film guide members and light-s does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photographic film cassette having film guide members and light-s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photographic film cassette having film guide members and light-s will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-787983