The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 21, 1989
Filed:
Sep. 10, 1987
Tadashi Nakagawa, Yotsukaido, JP;
Ichiro Nemoto, Yotsukaido, JP;
Ko Aosaki, Yotsukaido, JP;
Atsushi Misawa, Yotsukaido, JP;
Seikosha Co., Ltd., Tokyo, JP;
Abstract
A focal-plane shutter base for use in a camera includes a base plate having a shutter opening. Two sets of blades, each of which consists of a plurality of sheets for blocking light, are mounted on the base plate at one side of the shutter opening. The blades are covered by a cover plate connected to the base plate. Driving members for driving the blades are supported on shafts connected to the base plate. The base plate has a shield portion extending along the outer periphery thereof for preventing unwanted light from entering from the sides of the base plate, and a frame portion surrounding the shutter opening for blocking unwanted light from reaching the shutter opening and for structurally reinforcing the base plate. The base plate, shafts, shield portion and frame portion are all integrally molded from plastic.