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US 4,363,947 AGranted
Electrical heating element
AssigneeInternational Standard Electric Corporation
InventorHans A. Bergersen
Life of this patent
Estimating the term…
Abstract
Electrical resistance strip heating element, the insulated side areas of which are mechanically reinforced in order to render the strip less sensitive to tearing. The reinforcement may be of a slightly stretchable open mask type textile web.
Claims2
Electrical resistance strip heating element comprising
- an electrical resistance strip,
- two insulation sheets between which the electrical strip is laminated, the insulation sheets having an outer periphery extending beyond the strip, and
- reinforcing material laminated between the insulation sheets at the outer periphery for mounting the heating element, the reinforcing material being of a slightly stretchable, open mask material through which the insulation sheets come into contact, the reinforcing material having a thickness greater than the electrical resistance strip.
Dependencies are inferred from the claim text.