Patent US3659338A successfully refreshed from Google Patents.
US3659338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of making electric resistance heating mats
Assignee: Emerson Electric Co
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Filing: 1970-06-29
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Granted: 1972-05-02
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Expires: 1990-06-29
Abstract
Abstract The method of making an electric heating mat including disposing laterally spaced portions of electric resistance wire on a support, disposing a plastic extrusion head over the support and extruding a strand of plastic downwardly toward the wire portions, and relatively moving the support and extrusion head to lay the downwardly extruded strand cross-wise of and over the wire portions, the strand adhering to the portions at the places of crossing to form a dielectric strand connection between the wire portions.
Inventors
- 👤 William Mcfarlane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:24
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/10; H05B3/16; F; F24; F24D; F24D13/00; F24D13/02; Y; Y02; Y02B; Y02B30/00; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49083
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
81 words
The method of making an electric heating mat having an electric resistance heating wire and a strand of flexible, thermoplastic material adhered together, which comprises forming electric resistor wire in a pattern wherein certain wire portions are in laterally spaced relation with each other, disposing said patterned wire beneath an extrusion head, and extruding a strand of thermoplastic material from said head on to said wire pattern while effecting relative movement therebetween to cause said strand to cross said wire portions.
Claim 2
Independent Claim
81 words
The method of making an electric heating mat having an electric resistance heating wire and a strand of flexible, thermoplastic material adhered together, which comprises forming electric resistor wire in a pattern wherein certain wire portions are in laterally spaced relation with each other, disposing said patterned wire beneath an extrusion head, and extruding a strand of thermoplastic material from said head on to said wire pattern while effecting relative movement therebetween to cause said strand to cross said wire portions.
Claim 3
Dependent Claim
22 words
The method of claim 1 which further comprises heating at least one of said heating mat components sufficiently to effect adherence therebetween.
Claim 4
Dependent Claim
25 words
The method of claim 2 which further comprises heating said wire prior to extrusion of said strand of material thereon sufficiently to effect adherence therebetween.
Claim 5
Dependent Claim
19 words
The method of claim 2 which further comprises heating the assembled wire and strand sufficiently to effect adherence therebetween.
Claim 6
Dependent Claim
52 words
The method of claim 1 which further comprises disposing said wire in the pattern aforesaid on a conveyor, operating said conveyor to move said wire pattern in a path beneath said extrusion head, and reciprocating said extrusion head in a direction from side-to-side of the path of travel of said wire pattern.
Claim 7
Dependent Claim
40 words
The method of claim 5 which further comprises simultaneously extruding a pair of strands from said head on to said wire pattern from places offset from each other in the direction of the path of travel of said wire pattern.
Claim 8
Dependent Claim
42 words
The method of claim 5 which further comprises simultaneously extruding a pair of strands from said head on to said wire pattern from places offset from each other in a direction from side-to-side of the path of travel of said wire pattern.
Claim 9
Dependent Claim
52 words
The method of claim 5 which further comprises simultaneously extruding a plurality of strands from said head on to said wire pattern from places in part offset in the direction of the path of travel of said wire pattern and in part offset in a direction from side-to-side of said travel path.
Claim 10
Dependent Claim
31 words
The method of claim 7 which further comprises reciprocating said head an amount at least equal to the amount of offset aforesaid to cause overlapping of respective strands with each other.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |