Back to results
US 3,940,780 AGranted
Light-intercepting device for cameras having focal plane shutters
AssigneeNippon Kogaku K. K.
InventorAkihiko Sato
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeNippon Kogaku K. K.
InventorAkihiko Sato
Estimating the term…
In a camera having a focal plane shutter, a light-intercepting device for preventing light from passing through the clearance between the shutter curtain and the camera body to strike the film comprises at least one pair of resilient, opaque, planar light-intercepting members each having a rectilinear edge portion at one end thereof. These members are supported either by the camera body or by a support frame separable from the camera body so that they are inclined relative to the shutter curtain with the rectilinear edge portions being parallel to the direction of movement of the shutter curtain and making line contact with one side of the shutter curtain near the opposite edges thereof. An additional pair of identical light-intercepting members may be provided for making line contact with the other side of the shutter curtain.
A light-intercepting device in a camera having a pair of picture-taking openings provided in a camera body and a focal plane shutter curtain situated between the picture-taking openings, the device preventing light from passing through the clearance between the shutter curtain and the camera body, the device comprising:
Dependencies are inferred from the claim text.