Claims
- 1. A method of making a heat insulating pad having insulating and heat sink areas, comprising:
- a step of assembling a plurality of layers of metal foil in a stack wherein said layers are arranged one above another in a vertical direction, at least two of said layers being separated from each other by a plurality of embossments on at least one of said layers;
- a step of compressing at least one portion of said stack such that heat sink and insulating areas are formed therein with said layers providing better heat conduction in said vertical direction at said heat sink area than at said insulating area, said embossments in said insulating area separating said layers so as to provide a gap therebetween; and
- a step of securing said layers together in said heat sink area, said securing step including interengaging said layers in said heat sink area with each other.
- 2. The method of claim 1, further comprising a step of embossing a plurality of said layers such that a plurality of said embossments are formed therein, said embossing step being performed by simultaneously embossing a plurality of overlapping sheets of said metal foil, each of said sheets after said embossing step comprising a respective one of said layers.
- 3. The method of claim 2, wherein said assembling step comprises separating said sheets after said embossing step and offsetting them with respect to each other such that at least some of said embossments on two of said sheets facing each other are not aligned in said vertical direction.
- 4. The method of claim 1, wherein said step of securing said layers together in said heat sink area includes hermetically sealing said heat sink area.
- 5. The method of claim 1, wherein said securing step comprises forming a plurality of openings extending in said vertical direction through said layers in said heat sink area by passing a punch through said layers, said punch including a plurality of spaced-apart projections, each of which forms a respective one of said openings and said compressing and securing steps being simultaneously performed with a composite tool comprising a compressible material which performs said compressing step and said punch which performs said securing step, the compressible material and the punch being mounted together in side-by-side relationship.
- 6. The method of claim 1, further comprising a step of cutting said stack such that said heat sink area lies between said insulating area and an outer edge of said stack, said cutting step being performed simultaneously with said compressing and securing steps.
- 7. The method of claim 6, wherein said cutting, compressing and securing steps are simultaneously performed with a composite tool comprising a compressible material for compressing said layers, a punch for securing said layers by forming at least one opening therein and a cutter for cutting said layers, said compressible material being mounted between said cutter and said punch, said compressible material contacting said stack before said cutter and said punch contact said stack during said simultaneous cutting, compressing and securing steps, said compressible material being compressed to a predetermined amount and compressing said stack in said heat sink area when said cutter cuts said stack and said punch punches said at least one opening.
- 8. The method of claim 1, further comprising a step of inserting at least one scrim layer in said stack.
- 9. The method of claim 1, further comprising a step of coating at least part of at least one of said layers with heat radiating means.
- 10. The method of claim 9, wherein said heat radiating means comprises a black coating and said coating step comprises coating at least part of said heat sink area with said black coating.
- 11. A method of making a heat insulating pad having insulating and heat sink areas, comprising:
- a step of assembling a plurality of layers of metal foil in a stack wherein said layers are arranged one above another in a vertical direction, at least two of said layers being separated from each other by a plurality of embossments on at least one of said layers; and
- a step of compressing at least one portion of said stack such that heat sink and insulating areas are formed therein with said layers providing better heat conduction in said vertical direction at said heat sink area than at said insulating area, said embossments in said insulating area separating said layers so as to provide a gap therebetween.
- 12. The method of claim 11, further comprising a step of embossing a plurality of said layers such that a plurality of said embossments are formed therein, said embossing step being performed by simultaneously embossing a plurality of overlapping sheets of said metal foil, each of said sheets after said embossing step comprising a respective one of said layers.
- 13. The method of claim 12, wherein said assembling step comprises separating said sheets after said embossing step and offsetting them with respect to each other such that at least some of said embossments on two of said sheets facing each other are not aligned in said vertical direction.
- 14. The method of claim 11, further comprising a step of securing said layers together in said heat sink area, said securing step including hermetically sealing said heat sink area.
- 15. The method of claim 11, further comprising a step of inserting at least one scrim layer in said stack.
- 16. The method of claim 11, further comprising a step of coating at least part of at least one of said layers with heat radiating means.
- 17. The method of claim 16, wherein said heating radiating means comprises a black coating and said coating step comprises coating at least part of said heat sink area with said black coating.
- 18. The method of claim 11, wherein said assembling step comprises assembling a plurality of layers of aluminum, copper or gold foil having a thickness of no greater than about 2 mils.
- 19. The method of claim 11, wherein said assembling step comprises assembling a plurality of layers of metal foil which make said pad flexible.
Parent Case Info
This application is a divisional of application Ser. No. 07/468,425, filed Jan. 22, 1990, now U.S. Pat. No. 5,011,743.
US Referenced Citations (9)
Divisions (1)
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Number |
Date |
Country |
Parent |
468425 |
Jan 1990 |
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