Patent US4173823A successfully refreshed from Google Patents.
US4173823A
Expired / Lapsed
US
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Resistance heater for a pizza carton
Assignee: Georgia Pacific Consumer Products LP
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Filing: 1978-06-23
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Granted: 1979-11-13
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Expires: 1998-06-23
Abstract
Abstract In the fabrication of a resistance heater for a carton for packaging a pizza, an aluminum metallized sheet is adhered to a paperboard panel, a generally U-shaped strip of arc-sprayed zinc is applied to three edge portions of the upwardly facing electrically conductive metal layer of the metallized sheet, the interconnecting portion of the U-shaped strip and the immediately underlying metal layer are severed, and the metal layer is severed along a line extending adjacent the same interconnecting portion to the side thereof enclosed by the U-shaped strip, so that each of the severed sections of the interconnecting portion serves as a terminal for a corresponding leg portion of the U-shaped strip comprising the electrodes for the intermediate region of the metallized sheet.
Inventors
- 👤 Thomas L. Anderson
- 👤 Glenn A. Rasmussen
- 👤 Gerald J. Van Handel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:39
CPC Classifications
A; A47; A47J; A47J47/00; A47J47/14; A47J47/145; A21; A21B; A21B1/00; A21B1/52; H; H01; H01C; H01C17/00; H01C17/06; H05; H05B; H05B3/00; H05B3/02; H05B3/06; H05B3/20; H05B3/22; H05B3/28; H05B3/283; H05B3/286; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49083; Y10T29/49087; Y10T29/49098; Y10T29/49099
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
111 words
In the fabrication of electrical resistance heater means, the method comprising: forming a sheet of electrically resistive material; laying down a strip of electrically conductive material on said sheet of electrically resistive material, in such a pattern that said strip has mutually spaced substantially parallel portions and an interconnecting portion; and converting said parallel strip portions into electrode means for said electrically resistive material and said interconnecting strip portions into terminal means for said electrode means by severing said interconnecting portion and said resistive material underlying same, and severing said resistive material along a region adjacent said interconnecting strip portion and to the side thereof disposed between said parallel strip portions.
Claim 2
Dependent Claim
111 words
In the fabrication of electrical resistance heater means, the method comprising: forming a sheet of electrically resistive material; laying down a strip of electrically conductive material on said sheet of electrically resistive material, in such a pattern that said strip has mutually spaced substantially parallel portions and an interconnecting portion; and converting said parallel strip portions into electrode means for said electrically resistive material and said interconnecting strip portions into terminal means for said electrode means by severing said interconnecting portion and said resistive material underlying same, and severing said resistive material along a region adjacent said interconnecting strip portion and to the side thereof disposed between said parallel strip portions.
Claim 3
Dependent Claim
61 words
The method according to claim 1, and further characterized in that said step of forming a sheet of electrically resistive material comprises vacuum-metallizing a layer of a first metal onto a sheet of electrically insulative material, and said step of laying down a strip of electrically conductive material comprises arc-spraying a layer of a second metal onto said first metal layer.
Claim 4
Dependent Claim
45 words
The method according to claim 2 and further characterized in that said step of severing said interconnecting strip portion and said underlying resistive material is effected using die cutting procedures and the step of severing said resistive material is effected by a knife cutting procedure.
Claim 5
Dependent Claim
18 words
The method according to claim 3, wherein said first metal comprises aluminum and said second metal comprises zinc.
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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) | 1982-11-12 | 1983-05-14 | 1983-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-12 | 1987-05-14 | 1987-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-12 | 1991-05-14 | 1991-11-13 | $7700.00 | Window Closed / Lapsed |