Window for automobiles or the like, and method of manufacturing the same
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United States of America Patent
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Mar 30, 1993
Grant Date -
N/A
app pub date -
Nov 29, 1989
filing date -
Nov 30, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A window for automobiles or the like includes a window plate and an integral frame member along at least one edge of the window plate. The window is manufactured by preparing a window plate and a pre-shaped frame body which comprises a main portion and a surface layer covering an outer side of the main portion. The main portion of the pre-shaped frame body is composed of a thermoplastic synthetic resin material having a relatively high dielectric loss and containing a heat foamable agent therein. The surface layer is composed of a non-foamable thermoplastic synthetic resin material. The pre-shaped frame body is subjected to a dielectric heating in a mold, to cause the foamable agent in the main portion of the pre-shaped frame body to expand in the mold cavity. The resultant frame member of the window comprises a main portion composed essentially of a foamed thermoplastic synthetic resin material, which is covered on its outer side by a surface layer composed essentially of a non-foamed thermoplastic synthetic resin material.
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