Button making – Miscellaneous
Patent
1979-03-15
1980-09-09
Goldberg, Howard N.
Button making
Miscellaneous
79 4, A44B 106
Patent
active
042211395
ABSTRACT:
Apparatus for assembling covered buttons in which a first die assembly including a first punch carrying a first sleeve which sequentially receives a piece of covering material and the button shell with its flange extending toward the open end of the sleeve. A second assembly including a second sleeve having a bore one end of which is formed with a first cam surface extending axially inwardly of the above. The second sleeve is spring loaded to an extended position on a supporting post having a centrally located button back fastener receiving cavity in the end thereof with a second cam surface extending inwardly from the outer edge of the end to the bottom of a recess surrounding the cavity. An annular boss at the inner edge of the recess around the cavity is elevated to allow the material and the shell flange to curl inwardly under the button back. In the retracted position of the second sleeve on the post, the second cam surface forms a continuation of the first. In operation, when the first assembly carrying the covering piece and the shell moves toward the second assembly, the first sleeve stops against the spring loaded bottom sleeve and the punch continues forcing the material down so that the material is tucked inward by the beveled or curved surface of the second sleeve. Upon continued relative movement of the assemblies, the shell flange acts on the cam surface of the second sleeve to force the sleeve to its retracted position and the shell flange is moved inwardly of the back wall under the continued action of the first post, the extent of the inward movement of the shell flange being determined by the thickness of the material of the covering piece, as well as the height of the shell and the type of back used.
REFERENCES:
patent: 3550483 (1970-12-01), Humbel
patent: 3863527 (1975-02-01), Berning
C & C Metal Products Corporation
Goldberg Howard N.
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