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US 4,394,082 AGranted
Shutter for camera
AssigneeCanon Kabushiki Kaisha
InventorsMichio Senuma, Kunio Watanabe
Life of this patent
Estimating the term…
Abstract
The shutter blades of a camera are made lighter in weight in order to reduce the driving power needed to obtain a desired running speed by forming the shutter blades of a metal coated plastic sheet member which may be painted black in order to prevent light reflection, with the thickness of the metal coating being between 0.001 to 0.005 mm.
Claims2
A shutter for a camera comprising:
- an opening for light to pass therethrough;
- a plurality of shutter blades for opening and closing said opening for said light, said plurality of shutter blades comprising
- (a) a plastic sheet
- (b) a metal layer formed on both surfaces of said plastic sheet, said metal layer having a thickness of between 0.001 to 0.005 mm;
- (c) a black coating on the surface of said metal layer;
- (d) an embossed member for effecting connection with said shutter blades;
- and
- (e) shutter driving members mounted on said embossed portions of each of said plurality of shutter blades so as to connect said shutter blades to each other, said members opening and closing said plurality of shutter blades.
5 more elements
Dependencies are inferred from the claim text.