Light shielding blade for camera made of para-orientation aromat

Details Light shielding blade for camera made of para-orientation aromat Light shielding blade for camera made of para-orientation aromat

1998-05-01

1999-12-14

Jones, Deborah

Stock material or miscellaneous articles

Structurally defined web or sheet

Physical dimension specified

428114, 428143, 428408, 428458, 4284744, 428694SL, 528310, 396452, 396456, 396460, 26433112, B32B 900

Patent

active

060014652

ABSTRACT:
A light-shielding blade for use in cameras utilizes a film of para-type aromatic polyamide for its base material. The light-shielding blade has a single-layer structure using an aramid film as its blade material. The film is added with carbon black at a ratio of 2 to 10 percent by weight relative to a total weight of the blade material. Alternatively, the light-shielding blade has a laminated structure with a plurality of aramid films stacked each other and having a thickness of 2 to 30 microns each, a total thickness being set to a range of 50 to 200 microns.

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patent: 5659007 (1997-08-01), Akiyoshi et al.
patent: 5797055 (1998-06-01), Matsubara et al.
patent: 5853907 (1998-12-01), Yamada et al.

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