IP Library Granted Patent US 12697800
Granted Patent B2
US 12697800 · App. 17/874,860 · Granted Aug 4, 2026

Multilayer plate

Inventor: Tobias Kirchhoff (Muenster, DE)
Assignee: Variowell Development GmbH
B32B7/027B32B5/18B32B9/041B32B9/046B32B15/046B32B15/18B32B15/20B32B2266/0278B32B2307/302
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Quick Facts
Patent No.
US 12697800
App. No.
17/874,860
Granted
Aug 4, 2026
Kind
B2
Abstract

A multilayer plate is disclosed which includes three layers. A carbon layer is covered by a metallic layer, and a substrate layer is covered at least partially by the carbon layer and the metallic layer. The metallic layer includes a first zone and a second zone. The first zone is a zone defined by the carbon layer and the second zone is a zone defined by carbon layer-free zone. The substrate layer is made of a polyurethane flexible foam. The first zone has a higher thermal conductivity as the second zone. The multilayer plate can be used as a demonstration display for demonstrating the different thermal conductivity in the first zone compared to the second zone to a consumer.

Claims (36)

1 . A multilayer plate, comprising:

a carbon layer, covered by a metallic layer,

a substrate layer, covered at least partially by the carbon layer and the metallic layer, wherein the metallic layer comprises a first zone and a second zone and wherein the first zone is a zone defined by the carbon layer and the second zone is a zone defined by carbon layer-free zone;

wherein the substrate layer is made of a polyurethane flexible foam,

wherein the substrate layer has a recess to accommodate the carbon layer, and

wherein a first space between the carbon layer and the metallic layer in the first zone is a void.

2 . The multilayer plate according to claim 1 , wherein the carbon layer is a graphite plate with a thickness in a range of 2 millimeters and 4 millimeters.

3 . The multilayer plate according to claim 1 , wherein the graphite plate comprises one of a highly oriented pyrolytic graphite or a super-oriented graphite.

4 . The multilayer plate according to claim 1 , wherein the metallic layer has a thickness in a range of 0.05 millimeters to 0.1 millimeters.

5 . The multilayer plate according to claim 1 , wherein the metallic layer is one of an aluminum foil, a copper foil or a steel foil.

6 . The multilayer plate according to claim 1 , wherein the polyurethane flexible foam has one of a density in a range of 40 kilograms/square-meter to 50 kilograms/square-meter or a firmness in a range of 5.0 kilopascals to 9.0 kilopascals.

7 . The multilayer plate according to claim 1 , further comprising a frame surrounding the substrate layer and at least partially the carbon layer for holding the substrate layer and the carbon layer in place.

8 . The multilayer plate according to claim 1 , wherein the metallic layer is affixed on a circumferential surface of a frame.

9 . The multilayer plate according to claim 1 , wherein a second space between the substrate layer and the metallic layer in the second zone is a void.

10 . The multilayer plate according claim 1 , wherein the first zone has a higher thermal conductivity as the second zone.

11 . The multilayer plate according to claim 1 , further comprising an additional layer made of corrugated board and arranged next to the carbon layer, wherein the second zone is a zone defined by the additional layer.

12 . A method for demonstrating a differential thermal conductivity in the first zone or the second zone of the multilayer plate according to claim 1 , comprising:

placing one or more body parts on one of the first zone or the second zone;

placing a same one or a different one of the one or more body parts on a different one of the first zone or the second zone; and

comparing the effect of the placing of the one or more body parts on the first zone and the second zone,

wherein the multilayer plate comprises a carbon layer, covered by a metallic layer,

a substrate layer, covered at least partially by the carbon layer and the metallic layer, and wherein the metallic layer comprises the first zone and the second zone and wherein the first zone is a zone defined by the carbon layer and the second zone is a zone defined by carbon layer-free zone;

wherein the substrate layer is made of a polyurethane flexible foam.

13 . A multilayer plate, comprising:

a carbon layer;

an additional layer made of corrugated board and arranged next to the carbon layer; and

a metallic layer covering the carbon layer and the additional layer;

wherein the metallic layer comprises a first zone and a second zone,

wherein the first zone is a zone defined by the carbon layer and the second zone is a zone defined by the additional layer, and

wherein a first space between the carbon layer and the metallic layer in the first zone is a void.

14 . A multilayer plate, comprising:

a carbon layer, covered by a metallic layer,

a substrate layer, covered at least partially by the carbon layer and the metallic layer, wherein the metallic layer comprises a first zone and a second zone and wherein the first zone is a zone defined by the carbon layer and the second zone is a zone defined by carbon layer-free zone;

wherein the substrate layer is made of a polyurethane flexible foam,

wherein a first space between the carbon layer and the metallic layer in the first zone is a void, and

wherein a second space between the substrate layer and the metallic layer in the second zone is a void.