Method for molding ear cushions
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 7, 1981
Grant Date -
N/A
app pub date -
Nov 5, 1979
filing date -
Nov 5, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Ear cushions for headphones are formed from an open cell polyurethane foam material. An ear cushion blank is cut from the material and compressed to a desired shape between a holder and a forming tool. Heated air is forced through the porous material to set it to a contoured shape. The molding process can be performed quickly without damaging the cellular structure.
First Claim
Family
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Cited Art Landscape
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