US4898760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for extruding a low density elastomeric thermoplastic foam
Assignee: Amesbury Group Inc
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Filing: 1987-11-17
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Granted: 1990-02-06
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Expires: 2007-11-17
Abstract
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.
Inventors
- 👤 Louis Halberstadt
- 👤 Peter E. Mertinooke
- 👤 Joseph V. Perry
- 👤 Dan C. Muessel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:23
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/08; B29C65/083; B29C65/086; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/50; B29C44/56; B29C48/00; B29C48/25; B29C48/36; B29C48/395; B29C48/78; B29C48/80; B29C48/82; B29C48/83; B29C48/832; B29C48/84; B29C48/85; B29C48/86; B29C48/872; B29C48/873; B29C48/875; B29C66/00; B29C66/70; B29C66/71; B29C66/72; B29C66/727; B29C66/73; B29C66/731; B29C66/7313; B29C66/7315; B29C66/73151; B29C66/735; B29C66/7352; B29C66/739; B29C66/7392; B29C66/73921; E; E06; E06B; E06B7/00; E06B7/16; E06B7/22; E06B7/23; E06B7/2314; B29C48/001; B29C48/0012; B29C48/03; B29C48/12; B29C48/15; B29K; B29K2105/00; B29K2105/04; B29K2995/00; B29K2995/0037; B29K2995/007; B29K2995/0072; B29L; B29L2024/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/2419; Y10T428/24198; Y10T428/29; Y10T428/2902
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
73 words
A weatherseal comprising: a soft, low density elastomeric thermoplastic foam profile having a density less than 20 lbs/ft 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.
Claim 2
Dependent Claim
73 words
A weatherseal comprising: a soft, low density elastomeric thermoplastic foam profile having a density less than 20 lbs/ft 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.
Claim 3
Dependent Claim
14 words
The weatherseal according to claim 1 wherein said thin, low friction skin comprises polyethylene.
Claim 4
Dependent Claim
26 words
The weatherseal according to claim 1 wherein said means for attaching said weatherseal comprises a stiffener having barbs, said barbs effecting secure attachment to said structure.
Claim 5
Dependent Claim
21 words
The weatherseal according to claim 1 wherein the density of said foam profile is between 2 and 19 lbs/ft 3 .
Claim 6
Dependent Claim
11 words
The weatherseal according to claim 3 wherein said stiffener comprises polypropylene.
Claim 7
Dependent Claim
21 words
The weatherseal according to claim 1 wherein said means for attaching is ultrasonically bonded along the length of said foam profile.
Claim 8
Dependent Claim
14 words
The weatherseal according to claim 1 wherein said thermoplastic elastomer is a thermoplastic rubber.
Claim 9
Dependent Claim
20 words
The weatherseal according to claim 1 wherein said thermoplastic elastomer is a thermoplastic rubber having a durometer reading of 64.
Claim 10
Dependent Claim
51 words
A weatherseal comprising: a soft, low density elastomeric thermoplastic foam profile having a density less than 20 lbs/ft 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.
Claim 11
Dependent Claim
51 words
A weatherseal comprising: a soft, low density elastomeric thermoplastic foam profile having a density less than 20 lbs/ft 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.
Claim 12
Dependent Claim
14 words
The weatherseal according to claim 9 wherein said thin, low friction skin comprises polyethylene.
Claim 13
Dependent Claim
21 words
The weatherseal according to claim 9 wherein the density of said foam profile is between 2 and 19 lbs/ft 3 .
Claim 14
Dependent Claim
12 words
The weatherseal according to claim 9 wherein said foam profile is channel-shaped.
Claim 15
Dependent Claim
14 words
The weatherseal according to claim 9 wherein said thermoplastic elastomer is a thermoplastic rubber.
Claim 16
Dependent Claim
20 words
The weatherseal according to claim 9 wherein said thermoplastic elastomer is a thermoplastic rubber having a durometer reading of 64.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-05 | 1993-08-07 | 1994-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-05 | 1997-08-07 | 1998-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-05 | 2001-08-07 | 2002-02-06 | $7700.00 | Window Closed / Lapsed |