US3751629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface heating device
Assignee: Individual
•
Filing: 1971-03-09
•
Granted: 1973-08-07
•
Expires: 1991-03-09
Abstract
Abstract A dispensible container constructed for a single use incorporates a thin low voltage heating film with terminals accessible from outside and opening means permitting access to its contents is used as a package for a substance adapted to be heated and plastic in the sense of being sufficiently mobile to be removed from the container as soon as it has been sufficiently heated. The outer portion of the package may comprise means for directing most of the heat inside the package to heat the substance and its side walls may be stiffened by a stiff frame of light weight material of the stressed skin type.
Inventors
- 👤 P Eisler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:19
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/54; H05B3/56; A; A47; A47J; A47J36/00; A47J36/02; A47J36/022; B; B65; B65D; B65D81/00; B65D81/34; B65D81/3476; F; F24; F24C; F24C7/00; H05B3/02; H05B3/06; H05B3/10; H05B3/12; H05B3/14; H05B3/146; H05B3/565
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
167 words
A package comprising in combination, a dispensible container constructed for a single use to hold a removable plastic substance, a substance held in said container adapted to be heated while supported within the container and to be removed as soon as it has been sufficiently heated, a thin low voltage heating film having a surface pattern presenting a resistive electrical path between at least two terminals incorporated in said container with the terminals constructed of a portion of the heating film surface pattern extending from and accessible from outside the closed container for connection to a current supply without removing said substance from said container, opening means for permitting access to the substance in the container after it is heated and an external radiant heater, said package including a wall disposed opposite the radiant heater of a material having at least an external surface of good radiant heat absorption factor whereby radiant heat is transmitted through said wall to supplement the heat developed by the heating film.
Claim 2
Dependent Claim
167 words
A package comprising in combination, a dispensible container constructed for a single use to hold a removable plastic substance, a substance held in said container adapted to be heated while supported within the container and to be removed as soon as it has been sufficiently heated, a thin low voltage heating film having a surface pattern presenting a resistive electrical path between at least two terminals incorporated in said container with the terminals constructed of a portion of the heating film surface pattern extending from and accessible from outside the closed container for connection to a current supply without removing said substance from said container, opening means for permitting access to the substance in the container after it is heated and an external radiant heater, said package including a wall disposed opposite the radiant heater of a material having at least an external surface of good radiant heat absorption factor whereby radiant heat is transmitted through said wall to supplement the heat developed by the heating film.
Claim 3
Dependent Claim
46 words
A package as defined in claim 1, wherein the outer portion of the package comprises heat stable foil means for directing most of the heat inside said package to heat the substance and transmitting radiant heat to the substance inside the container from said radiant heater.
Claim 4
Dependent Claim
45 words
A package as set forth in claim 1, and means included in the heat path between the heat generating surface of the film and the substance whereby the surface temperature at any point on the substance is prevented from rising above a predetermined maximum value.
Claim 5
Dependent Claim
32 words
A package as set forth in claim 1 wherein at least during part of the heating period the heating film is spaced from the surface of the substance to be heated thereby.
Claim 6
Dependent Claim
67 words
A package as set forth in claim 4 also including means ensuring that at least after energization of the film and before any part of the substance reaches a temperature at which undesirable changes occur in it, a small body of liquid is present in the space between the heating film and surface of the substance, said liquid having access to a substantial area of the substance.
Claim 7
Dependent Claim
19 words
Apparatus as defined in claim 1 wherein said radiant heater includes a closable receptacle compartment for receiving said package.
Claim 8
Dependent Claim
23 words
Apparatus as defined in claim 6 wherein said compartment includes a drawer movable in and out of said compartment to receive said package.
Claim 9
Dependent Claim
35 words
Apparatus as defined in claim 7 wherein said drawer is wedge shaped and said compartment includes activation devices actuated by wedge action to activate said radiant heater when said drawer is moved into said compartment.
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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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |