3635609 is referenced by 30 patents and cites 9 patents.

A workpiece which is to have a raised pattern applied to at least one surface thereof is positioned in the apparatus between a support member and a die member, the surface of the die member being a reverse image of the desired pattern. While the die member and workpiece are held in contact by a static force, high-frequency vibrations are applied to impress the pattern on at least one surface of the workpiece. Several alternate embodiments involve rotating dies or relative movement between the source of vibrations and the die and workpiece in a plane perpendicular to the direction of the high-frequency vibrations.

Apparatus for embossing of materials with high-frequency vibrations
Application Number
Publication Number
Application Date
July 26, 1968
Publication Date
January 18, 1972
Balamuth Lewis
Cavitron Corporation
B30b 15/00
B01J 19/10
B44B 05/00
B29C 67/00
B29C 59/04
B29C 59/02
B29C 43/00
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