Patent US1096903A successfully refreshed from Google Patents.
US4777931A
Expired / Lapsed
US
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Platewarmer system
Assignee: KALTRON PHOENIX CORP
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Filing: 1987-07-07
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Granted: 1988-10-18
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Expires: 2007-07-07
Abstract
Abstract A platewarmer system comprises a platewarmer and platewarmer lid. The platewarmer has a base, a heat storage member supported on the base, and a retainer covering the heat storage member and fixed to the base whereby the heat storage member is fixed to the base. The platewarmer lid has a body and an insert fixed to the underside of the body for reflecting heat radiated from the surface over which the lid is placed. The method of manufacturing the platewarmer includes forming a heat storage member, forming a retainer, and molding a plastic base wherein the heat sotrage member and retainer are encapsulated in the base as a unit. The method of manufacturing the platewarmer lid includes forming an insert and molding a plastic base wherein the insert is encapsulated inside the base.
Inventors
- 👤 Robert C. Ziegler
- 👤 Pasquale D. Tropiano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:49
CPC Classifications
A; A47; A47J; A47J36/00; A47J36/24; A47J36/2494; Y; Y10; Y10S; Y10S220/00; Y10S220/12
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
106 words
A platewarmer comprising: a plastic base having a flat, central portion; a heat storage member supported on the central portion of said base; and a metallic retainer covering said heat storage member and fixed to said base whereby said heat storage member is fixed on said base; wherein the upper surface of the central portion of the plastic base is recessed for receipt of said heat storage member; and wherein the central portion of the base includes a circumferential groove extending radially into said recess and said retainer is provided with a flange which cooperates with said groove for retention of said retainer on said base.
Claim 2
Dependent Claim
106 words
A platewarmer comprising: a plastic base having a flat, central portion; a heat storage member supported on the central portion of said base; and a metallic retainer covering said heat storage member and fixed to said base whereby said heat storage member is fixed on said base; wherein the upper surface of the central portion of the plastic base is recessed for receipt of said heat storage member; and wherein the central portion of the base includes a circumferential groove extending radially into said recess and said retainer is provided with a flange which cooperates with said groove for retention of said retainer on said base.
Claim 3
Dependent Claim
24 words
The platewarmer of claim 1 including an upwardly extending, outwardly inclined side wall which terminates at a rounded ledge for receiving a mating lid.
Claim 4
Dependent Claim
36 words
The platewarmer of claim 1, wherein the depth of the recess is less than the thickness of said heat storage member to permit the heat storage member to project beyond the inner surface of said platewarmer.
Claim 5
Dependent Claim
25 words
The platewarmer of claim 3 wherein the lower surface of the central portion of the base is provided with a plurality of downwardly projecting feet.
Claim 6
Dependent Claim
12 words
The platewarmer of claim 2 wherein said plastic base is a polysulfone.
Claim 7
Dependent Claim
12 words
The platewarmer of claim 3 wherein said plastic base is a polysulfone.
Claim 8
Dependent Claim
19 words
The platewarmer of claim 2 wherein said heat storage member is aluminum and said metallic retainer is stainless steel.
Claim 9
Dependent Claim
19 words
The platewarmer of claim 3 wherein said heat storage member is aluminum and said metallic retainer is stainless steel.
Claim 10
Dependent Claim
20 words
The platewarmer of claim 2 wherein said metallic retainer and heat storage member are integrally joined to said plastic base.
Claim 11
Dependent Claim
19 words
The platewarmer of claim 3 wherein said metallic retainer and heat storage are integrally joined to said plastic base.
Claim 12
Dependent Claim
22 words
The platewarmer of claim 9 wherein said metallic retainer and heat storage member are joined to the plastic base by injection molding.
Claim 13
Dependent Claim
43 words
The platewarmer of claim 3 wherein said retainer is hat-shaped and includes a flat central portion which terminates at a downwardly extending wall, which, in turn merges with an outwardly extending flange, said flange being encapsulated within said central portion of said base.
Claim 14
Dependent Claim
79 words
A platewarmer system comprising: a platewarmer having a plastic base, a heat storage member supported on said base, a metallic retainer having a flange, said retainer covering said heat storage member with said flange being molded into said base to fix said heat storage member to said base; and a lid which cooperates with said platewarmer including an insert fixed to the underside of said lid for reflecting heat radiated from the surface over which said lid is placed.
Claim 15
Dependent Claim
79 words
A platewarmer system comprising: a platewarmer having a plastic base, a heat storage member supported on said base, a metallic retainer having a flange, said retainer covering said heat storage member with said flange being molded into said base to fix said heat storage member to said base; and a lid which cooperates with said platewarmer including an insert fixed to the underside of said lid for reflecting heat radiated from the surface over which said lid is placed.
Claim 16
Dependent Claim
21 words
The platewarmer system of claim 13 wherein said heat storage member is fixed in heat conducting relationship with said metallic retainer.
Claim 17
Dependent Claim
33 words
The platewarmer system of claim 13 wherein said platewarmer base has a flat, central portion; said retainer is of hat-shaped construction which fixes said heat storage member axially and radially on said base.
Claim 18
Dependent Claim
58 words
The platewarmer system of claim 15 wherein the upper surface of the central portion of the plastic base is provided with a central recess for receiving said heat storage member, the depth of said recess being less than the thickness of said heat storage member to permit the heat storage member to protrude upwardly from said plastic base.
Claim 19
Dependent Claim
13 words
The platewarmer system of claim 16 wherein said plastic base is a polysulfone.
Claim 20
Dependent Claim
19 words
The platewarmer system of claim 16 wherein said heat storage member is aluminum and said retainer is stainless steel.
Claim 21
Dependent Claim
13 words
The platewarmer system of claim 17 wherein said plastic base is injection molded.
Claim 22
Dependent Claim
49 words
The platewarmer system of claim 15 wherein said lid is molded from plastic and has an inside surface and an outside surface, the inside surface having a flat central portion; and said insert is metallic and is fixed to the inside surface of said central portion of the lid.
Claim 23
Dependent Claim
15 words
The platewarmer system of claim 20 wherein said insert is molded into said plastic body.
Claim 24
Dependent Claim
12 words
The platewarmer system of claim 21 wherein said plastic body is polysulfone.
Claim 25
Dependent Claim
12 words
The platewarmer system of claim 20 wherein said insert is stainless steel.
Claim 26
Dependent Claim
12 words
The platewarmer system of claim 22 wherein said insert is stainless steel.
Claim 27
Independent Claim
35 words
A method of manufacturing a platewarmer comprising: forming a heat storage member; forming a retainer; and molding a plastic base wherein said heat storage member and retainer are encapsulated in said base as a unit.
Claim 28
Independent Claim
35 words
A method of manufacturing a platewarmer comprising: forming a heat storage member; forming a retainer; and molding a plastic base wherein said heat storage member and retainer are encapsulated in said base as a unit.
Claim 29
Dependent Claim
55 words
A platewarmer comprising: a plastic base having a flat, central portion; a heat storage member supported on the central portion of said base; and a metallic retainer having a flange, said retainer covering said heat storage member, with said flange being molded into said base, whereby said heat storage member is fixed on said base.
Claim 30
Dependent Claim
55 words
A platewarmer comprising: a plastic base having a flat, central portion; a heat storage member supported on the central portion of said base; and a metallic retainer having a flange, said retainer covering said heat storage member, with said flange being molded into said base, whereby said heat storage member is fixed on said base.
Claim 31
Dependent Claim
26 words
The platewarmer of claim 26 wherein the upper surface of the central portion of the plastic base is recessed for receipt of said heat storage member.
Claim 32
Dependent Claim
36 words
The platewarmer of claim 27 wherein the central portion of the base includes a circumferential groove extending radially into said recess and said flange cooperates with said groove for retention of said retainer on said base.
Claim 33
Dependent Claim
24 words
The platewarmer of claim 26 including an upwardly extending, outwardly inclined side wall which terminates at a rounded ledge for receiving a mating lid.
Claim 34
Dependent Claim
36 words
The platewarmer of claim 27, wherein the depth of the recess is less than the thickness of said heat storage member to permit the heat storage member to project beyond the inner surface of said platewarmer.
Claim 35
Dependent Claim
25 words
The platewarmer of claim 30 wherein the lower surface of the central portion of the base is provided with a plurality of downwardly projecting feet.
Claim 36
Dependent Claim
12 words
The platewarmer of claim 29 wherein said plastic base is a polysulfone.
Claim 37
Dependent Claim
12 words
The platewarmer of claim 30 wherein said plastic base is a polysulfone.
Claim 38
Dependent Claim
19 words
The platewarmer of claim 29 wherein said heat storage member is aluminum and said metallic retainer is stainless steel.
Claim 39
Dependent Claim
19 words
The platewarmer of claim 30 wherein said heat storage member is aluminum and said metallic retainer is stainless steel.
Claim 40
Dependent Claim
20 words
The platewarmer of claim 29 wherein said metallic retainer and heat storage member are integrally joined to said plastic base.
Claim 41
Dependent Claim
20 words
The platewarmer of claim 30 wherein said metallic retainer and heat storage member are integrally joined to said plastic base.
Claim 42
Dependent Claim
22 words
The platewarmer of claim 36 wherein said metallic retainer and heat storage member are joined to the plastic base by injection molding.
Claim 43
Dependent Claim
10 words
The platewarmer of claim 26 wherein said retainer is hat-shaped.
Claim 44
Dependent Claim
20 words
The platewarmer of claim 26 wherein said heat storage member is fixed in heat conducting relationship with said metallic retainer.
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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) | 1991-10-18 | 1992-04-18 | 1992-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-18 | 1996-04-18 | 1996-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-18 | 2000-04-18 | 2000-10-18 | $7700.00 | Window Closed / Lapsed |