Patent US3900714A successfully refreshed from Google Patents.
US3900714A
Expired / Lapsed
US
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Heated tool for heading plastic studs
Assignee: LEWART COMPANY 3562 WEST 69TH STREET CLEVELAND OHIO 44102 A OHIO CORP
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Filing: 1973-10-17
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Granted: 1975-08-19
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Expires: 1993-10-17
Abstract
Abstract A tool for applying heat to a heat-malleable workpiece, constructed to automatically cycle the temperature of a heatapplying portion of the tool in use. The tool includes a heater of substantially constant output, a heat-conductive forming die, and a heat conduit connecting the die to the heater. A portion of the heat conduit adjacent the die is more restrictive to heat transmission than is the die, yet is capable of transmitting heat faster than the die radiates to the ambient atmosphere. In use, the temperature of the die portion will be rapidly diminished during a shaping operation to permit removal from the shaped workpiece without sticking and will then be automatically reheated to a forming temperature by heat conducted through the restrictive portion.
Inventors
- 👤 Lewis R Beyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:08
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B23; B23K; B23K3/00; B23K3/02; B23K3/025; B29C65/56; B29C65/60; B29C65/606; B29C66/00; B29C66/40; B29C66/47; B29C66/474; B29C66/80; B29C66/81; B29C66/812; B29C66/8126; B29C66/81261; B29C66/814; B29C66/8141; B29C66/81411; B29C66/81421; B29C66/81423; B29C66/816; B29C66/8167; B29C66/818; B29C66/8183; B29C66/81831; H; H05; H05B; H05B3/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/114; B29C66/1142; B29C66/50; B29C66/51; B29C66/53; B29C66/532; B29C66/61; B29C66/83; B29C66/832; B29C66/8322; B29L; B29L2031/00; B29L2031/705; B29L2031/7052; H05B2203/00; H05B2203/03; Y; Y10; Y10T; Y10T156/00; Y10T156/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
124 words
A tool for heading a plastic stud against a heat-conductive element, comprising a heater, heat-conductive forming means including a concave head-forming surface for heating and forming an end of a plastic stud, and a thermally conductive heat conduit connecting said forming means to said heater, said forming means further including surface portion means for contacting a heatconductive element against which the plastic stud is formed, and said heat conduit including a portion closely adjacent said forming means more restrictive to heat transmission than the forming means, said portion being capable of transmitting heat to said forming means faster than the forming means radiates heat away to ambient atmosphere but slower than the heat conductive element and stud conduct away heat from said forming means.
Claim 2
Dependent Claim
124 words
A tool for heading a plastic stud against a heat-conductive element, comprising a heater, heat-conductive forming means including a concave head-forming surface for heating and forming an end of a plastic stud, and a thermally conductive heat conduit connecting said forming means to said heater, said forming means further including surface portion means for contacting a heatconductive element against which the plastic stud is formed, and said heat conduit including a portion closely adjacent said forming means more restrictive to heat transmission than the forming means, said portion being capable of transmitting heat to said forming means faster than the forming means radiates heat away to ambient atmosphere but slower than the heat conductive element and stud conduct away heat from said forming means.
Claim 3
Dependent Claim
23 words
A tool as set forth in claim 1 wherein said portion adjacent said forming means is of lesser mass than the forming means.
Claim 4
Dependent Claim
25 words
A tool as set forth in claim 2 wherein said portion adjacent said forming means is of smaller cross sectional area than the forming means.
Claim 5
Dependent Claim
33 words
A tool as set forth in claim 2 wherein said portion adjacent said forming means is also of lesser mass than a part of the heat conduit between said portion and the heater.
Claim 6
Dependent Claim
26 words
A tool as set forth in claim 1 wherein said portion adjacent said forming means is of a material having lower thermoconductivity than the forming means.
Claim 7
Dependent Claim
211 words
A combination forming die and heat conduit tool for heading plastic studs, comprising a first portion including means for connecting the tool to a heater, a second portion including heat-conductive forming means having a concave head-forming surface for heating and forming an end of a plastic stud and a peripheral surface portion for contacting a heat-conductive element against which a plastic stud is headed, and means intermediate the first and second portions more restrictive to heat transmission than either of said first and second portion for limiting the rate of heat flow from the first portion to the second portion, said intermediate means being capable of transmitting heat to said second portion faster than said second portion radiates heat away to the am ambient atmosphere but slower than the heat conductive element and stud conduct heat away from said forming means, whereby when said tool is heated at said first portion with a constant heat input to a suitable forming temperature and used to head a stud, the second portion will cool from conduction of heat to the stud and element against which the stud is headed at a significantly faster rate than heat will be supplied through said intermediate means, and will reheat upon removal from said stud and element.
Claim 8
Dependent Claim
211 words
A combination forming die and heat conduit tool for heading plastic studs, comprising a first portion including means for connecting the tool to a heater, a second portion including heat-conductive forming means having a concave head-forming surface for heating and forming an end of a plastic stud and a peripheral surface portion for contacting a heat-conductive element against which a plastic stud is headed, and means intermediate the first and second portions more restrictive to heat transmission than either of said first and second portion for limiting the rate of heat flow from the first portion to the second portion, said intermediate means being capable of transmitting heat to said second portion faster than said second portion radiates heat away to the am ambient atmosphere but slower than the heat conductive element and stud conduct heat away from said forming means, whereby when said tool is heated at said first portion with a constant heat input to a suitable forming temperature and used to head a stud, the second portion will cool from conduction of heat to the stud and element against which the stud is headed at a significantly faster rate than heat will be supplied through said intermediate means, and will reheat upon removal from said stud and element.
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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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |