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Pad including heat sink and thermal insulation area
| Details |
Inventors: Sheridan, William M.; Ragland, Raymond E.;
Assignee: ATD Corporation (St. Louis, MO)
Primary Examiner: Foelak; Morton
Assistant Examiner:
Attorney, Agent or Firm: Burns, Doane, Swecker & Mathis
A pad including thermal insulation and heat sink areas. The pad includes a plurality of layers of metal foil forming a stack with the layers arranged one above the other, the stack including at least one heat sink area and at least one insulating area adjacent to the heat sink area, the layers providing better heat conduction in the vertical direction at the heat sink area than at the insulating area. At least one of the layers includes a plurality of embossments therein separating the one layer from an adjacent one of the layers in the insulating area. The pad can include a single insulating area surrounded by a heat sink area and a black coating can be provided on selected portions of the layers to improve heat radiating characteristics of the pad. For instance, the heat sink area can be coated with the black coating to radiate heat away from the pad at a desired location. The pad is particularly useful in shielding a heat sensitive component on one side of the pad from a heat source on the other side of the pad. The pad can be covered with a prescored and/or embossed metal sheet coated on one or both sides with adhesive. The sheet can also be used by itself for fixturing. The sheet can be secured to an object by heating to cause the adhesive to adhere to the object. The prescoring can be perforations in the sheet and the embossments can be in a diamond shaped cross-hatching configuration. |
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DETAILED DESCRIPTION An object of the present invention is to provide a pad including thermal insulation and heat sink areas whereby the pad can be used as a heat reflecting shield as well as a heat sink for dissipating heat at a desired location.
The pad can include means for providing shapability to the pad in order to conform the pad to an object around which the pad is located in use.
In accordance with a preferred embodiment of the invention, the pad includes heat sink and thermal insulating areas, the heat sink area conducting a greater amount of heat between opposite surfaces of the pad than does the thermal insulating area.
The pad includes a plurality of layers of metal foil forming a stack wherein the layers are arranged one above another in a vertical direction, the stack including at least one heat sink area wherein the layers are closer together in the vertical direction than at at least one insulating area of the stack adjacent to the heat sink area, at least one of the layers including a plurality of embossments therein separating the one layer from an adjacent one of the layers in the insulating area.
In particular, the heat sink area can comprise a compressed outer periphery of the stack which extends horizontally in a transverse direction perpendicular to the vertical direction completely around the insulation area, the layers at the outer periphery being secured together by securing means.
The pad can include a single insulating area or a plurality of insulating areas and the heat sink area can partially surround an insulating area or can completely surround the insulating area.
In one embodiment of the invention, the layers are in contact with each other in the heat sink area and the securing means comprises a mechanical bond such as staples or other equivalent between the layers in at least part of the heat sink area.
In another embodiment, the securing means comprises at least one opening defined by sheared surfaces of the layers, each of the sheared surfaces extending in the vertical direction above and below a plane which is coplanar with facing surfaces of two of the layers
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