Photographic paper roll core holding device
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United States of America Patent
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Aug 13, 1985
Grant Date -
N/A
app pub date -
Feb 8, 1983
filing date -
Feb 8, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A holding device for securing a photographic paper roll core concentrically about a rotatable shaft has a resilient clamping ring positioned concentrically about the shaft. An annular shoulder is fixed on the shaft on one side of the resilient clamping ring and a cylindrical compression sleeve is positioned concentrically about the shaft on the other side of the resilient clamping ring with the cylindrical compression sleeve being movable in axial direction along the shaft. A spring bias apparatus normally urges the cylindrical compression sleeve away from the shoulder so that the resilient clamping ring is in a first radially retracted position. The holding device has a lever-actuated cam assembly for urging the cylindrical compression sleeve toward the shoulder upon actuation of the cam assembly. In so doing, the cam assembly overcomes the urging of the spring bias means so that the resilient clamping ring is deformed between the cylindrical compression sleeve and the shoulder into a second radially-extended position in which the resilient clamping ring engages an inner radial surface of the paper roll core to secure the paper roll core for rotation with the shaft.
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