Claims
- 1. A thermal pad comprising, an outer heating surface plate, and outer support disc, and an intermediate heating element comprising a resistance plate sandwiched between a pair of insulation plates, spaced resistor wires supported on said resistor plate, said heating surface plate having a peripheral lip underlying said disc for tightly compressing together the heating surface plate, the heating element and the disc, said heating surface plate being concavely shaped toward said heating element and said support disc being convexly shaped toward said heating element for thereby ensuring firm contact between said heating surface plate and said heating element for improving heat transfer and to prevent any misalignment of the resistor wires.
- 2. The thermal pad according to claim 1, wherein the resistance plate has notches in the outer peripheral edge thereof for the reception of the resistance wires to avoid any dislodgement and disconnection of the wires.
Parent Case Info
This application is a divisional application of application Ser. No. 538,018, filed Jun. 12, 1990 as a continuation-in-part of application Ser. No. 319,045, filed Mar. 6, 1989 and now abandoned.
US Referenced Citations (5)
Divisions (1)
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Number |
Date |
Country |
Parent |
538018 |
Jun 1990 |
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Continuation in Parts (1)
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Number |
Date |
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Parent |
319045 |
Mar 1989 |
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