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Title:
LIGHT SHIELDING BLADE
Document Type and Number:
Japanese Patent JPH10312000
Kind Code:
A
Abstract:

To obtain blade material having high rigidity though it is comparatively light in weight and suitable for high speed operation.

The blade material of the light shielding blade 1 for a camera is film 2 constituted of para-aromatic polyamide. The blade 1 has single layer structure where aramid film 2 is used as the blade material, and carbon black 3 is added in the film 2 in the ratio of 2-10 wt.% to the total weight of the blade material. Or it has laminated structure where plural aramide films 2 having 2-30 μm thickness are superposed to be the blade material, and the total thickness of the blade material is within 50-200 μm.


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Inventors:
TAKAHASHI SHIGEMI
INOUE NOBUYOSHI
OGAWA TAKAO
TACHIHARA NORIFUMI
Application Number:
JP13788397A
Publication Date:
November 24, 1998
Filing Date:
May 12, 1997
Export Citation:
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Assignee:
COPAL CO LTD
International Classes:
B32B27/34; B32B33/00; G03B9/00; G02F1/1335; G03B9/36; (IPC1-7): G03B9/00; G03B9/36
Attorney, Agent or Firm:
Suzuki Harutoshi



 
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