Button back and button
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United States of America Patent
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Oct 30, 2018
Grant Date -
Mar 1, 2018
app pub date -
Jun 23, 2015
filing date -
Jun 23, 2015
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A button back which makes it possible to form the front surface of a button to be a circular shape; a shell cap hard to be rotated; and an umbrella part hard to be deformed. The button back is made of metal, including a cylindrical part and an umbrella part extending radially outward from one axial end of the cylindrical part. The umbrella part includes a first bending part which extends radially outward from the one axial end of the cylindrical part and then bends on the opposite side of the cylindrical part. An outer periphery, including a radially outer end, of the first bending part has a polygonal shape including at least three corners and sides which extend between two circumferentially adjacent corners. The umbrella part includes flat plates extending radially outward from the radially outer end, corresponding to the sides, of the first bending part.
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Family
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Cited Art Landscape
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