Shutter device
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United States of America Patent
Stats
-
May 28, 1991
Grant Date -
N/A
app pub date -
Sep 12, 1990
filing date -
Sep 19, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A focal-plane shutter device comprises aperture opening blades including a blade with an edge for forming an exposure slit, aperture closing blades including a blade with an edge for forming the exposure slit, first and second base plates disposed between the aperture opening blades and the aperture closing blades and each having an aperture for forming an exposure aperture, and a means for spacing the first and second base plates by a predetermined distance. According to the above composition, even is the slit forming edge of the blade of the aperture closing blades is moved at high speed, it is prevented from colliding with the first and second base plates.
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