1981-04-16
1982-04-27
Gonzales, John
354250, G03B 940
Patent
active
043267874
ABSTRACT:
A camera shutter having a plurality of shutter blades consisting of thin plastic plates operable by means of a comparatively small driving power, so designed that in order to avoid the formation of slits at the overlapped portions of the shutter blades due to deformation magnetic powder is put in the shutter blade and magnetized along the direction of the thickness in such a manner that the blades attract each other by means of magnetic force.
REFERENCES:
patent: 4051499 (1977-09-01), Kondo
patent: 4150890 (1979-04-01), Nakagawa et al.
Canon Kabushiki Kaisha
Gonzales John
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