Electric hair curling waved with improved heating element arrang

Details Electric hair curling waved with improved heating element arrang Electric hair curling waved with improved heating element arrang

1985-09-30

1987-09-29

Bartis, Anthony

Electric heating

Heating devices

Tool or instrument

132 9, 132 33R, 132 37R, 219222, 219236, 219528, 219534, 219536, 219543, 219549, 338211, 338217, 338308, A45D 104, H05B 310, H01C 700

Patent

active

046970665

ABSTRACT:
An electric heating element for a hair-curling wand having a barrel attached at one end to a handle is inserted into a portion of the barrel and consists of a loop cut out of thin flexible nickel foil having free ends forming terminals for connection to a voltage source, the loop being insulatingly embedded between two thin, flexible sheets of an insulating material. The loop is formed in the shape of two parallel straight stretches and reentrant portions at its both ends, whereby more thermal energy is produced by the end portions than by the central portion, resulting in a sustantially uniform temperature distribution. The heating element is pressed onto the inner wall of the barrel by a resilient, longitudinally slotted tube, which has an initially larger diameter than that of the barrel and is inserted along with the heating element into the barrel by a special compressing tool. Alternatively, the heating element may be a flat resistor strip applied to the flexible sheet on the side remote from the barrel surface.

REFERENCES:
patent: 1336559 (1920-04-01), Gutzwiller
patent: 1358219 (1920-11-01), Lancaster
patent: 1477602 (1923-12-01), Simon
patent: 1555953 (1925-10-01), Simon
patent: 1674488 (1928-06-01), Tang
patent: 2371696 (1945-03-01), Levitt
patent: 2473183 (1949-06-01), Watson
patent: 2501417 (1950-03-01), Smits et al.
patent: 3129314 (1964-04-01), Hage et al.
patent: 3387248 (1968-06-01), Rees
patent: 4354092 (1982-10-01), Manabe et al.

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