Back to results
US 5,205,506 AGranted
Photographic film cassette having light trapping pile fabrics attached to a mouth thereof
AssigneeFuji Photo Film Co., Ltd.
InventorsKazunori Mizuno, Hideaki Kataoka
Life of this patent
Estimating the term…
Abstract
A film cassette is provided with a film passage mouth to which pile fabrics are attached for trapping light. Pile threads of the pile fabrics are inclined flexibly in the film advancement direction to reduce resistance against film advancement. The leader of the film is formed in a triangular shape such that the film leader end passes the pile fabrics while gradually increasing the contact area with the fabric, thereby reducing resistance against film advancement.
Claims15
A film cassette comprising:
- a cassette formed with a film passage mouth for allowing a film to pass therethrough, said film passage mouth having upper and lower surfaces;
- and
- light trap fabric attached to said upper and lower surfaces, wherein each of said light trap fabrics comprises pile threads, said pile threads of at least one of said light trap fabrics being inclined in a direction of advancement of the film from said cassette,
- wherein said light trap fabric comprises a warp knitted fabric having said pile threads, said pile threads being knitted in a base fabric of said pile knitted fabric, and
- further wherein said pile threads protrude from said base fabric, with said inclination being along a direction from a needle loop toward a sinker loop of said base fabric.
2 more elements
A film cassette comprising:
- a cassette formed with a film passage mouth for allowing a film to pass therethrough, said film passage mouth having upper and lower surfaces;
- and
- light trap fabric attached to said upper and lower surfaces, wherein each of said light trap fabrics comprises pile threads, said pile threads of at least one of said light trap fabrics being inclined in a direction of advancement of the film from said cassette, wherein said light trap fabric comprises a woven fabric having pile thread woven of warp and weft threads, all of said weft threads of said woven fabric intersecting with each of said pile threads, and each of said pile threads being in contact with an adjacent one of said warp threads and,
- further wherein a length of a base portion of said pile threads substantially perpendicular to a base fabric of said woven fabric is determined to be no longer than 0.5 mm.
1 more element
Dependencies are inferred from the claim text.