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US 4,898,760 AGranted
Process and apparatus for extruding a low density elastomeric thermoplastic foam
AssigneeAmesbury Industries, Inc.
InventorsLouis Halberstadt, Peter E. Mertinooke, Joseph V. Perry, Dan C. Muessel
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Abstract
A process and apparatus are described for extruding a soft, low density elastomeric thermoplastic foam. A single screw extruder having a very large screw length to diameter ratio is provided to thoroughly mix the thermoplastic elastomer with a blowing agent. A thin, substantially taperless die is also provided to form extruded profiles. By using such a process and apparatus, a variety of complex-shaped extruded profiles may be easily produced.
Claims14
A weatherseal comprising:
- a soft, low density elastomeric thermoplastic foam profile having a density less than 20 lbs/ft.sup.3 and foamed from a thermoplastic elastomer having a durometer reading of less than 65;
- a means for attaching said weatherseal to a structure, said means for attaching being bonded along the length of said foam profile;
- and
- a thin, low friction skin bonded to at least part of the surface of said foam profile.
1 more element
A weatherseal comprising:
- a soft, low density elastomeric thermoplastic foam profile having a density less than 20 lbs/ft.sup.3 and foamed from a thermoplastic elastomer having a durometer reading of less than 65;
- and
- a thin, low friction skin bonded to at least part of the surface of said foam profile.
Dependencies are inferred from the claim text.