Hair roller heating unit

Electric heating – Heating devices – Tool or instrument

Patent

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Details

132 33R, 219222, 219521, 219523, A45D 412, H05B 302

Patent

active

044892330

ABSTRACT:
An electrical heating unit of a heating set for hair curling rollers, is composed of two aluminum sheet components carrying together three parallel rows of upstanding heating posts and enclosing between them a resistance heater of the "rope heater" kind. It comprises a main plate of rectangular configuration which contains two lateral parallel rows of hollow heating posts along the long edges of the rectangle and is centrally recessed over its entire length in the shape of a rectangular trough of a depth corresponding to the thickness of the rope heater. The rope heater is positioned in the trough and extends along the four sides of the rectangle, while its ends are attached to a thermostatic switch and a thermo-fuse located in a separate pocket in this trough. A top plate covers the trough in the main plate and is provided with one central row of heating posts which are staggered in relation to the posts of the lateral rows. The top plate is recessed in its center portion by a number of rectangular wells which extend to the bottom of the trough, each well being perforated by a bore which cooperates with a similar bore in the trough. Rivets or screws connect the main plate to the top plate forcefully compressing the rope heater between their surfaces, thus providing good heat conductive contact between the heater and the two plates.

REFERENCES:
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patent: 3473005 (1969-10-01), Grandinetti
patent: 3541302 (1970-11-01), Makino
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patent: 3600552 (1971-08-01), Tolmie
patent: 3610878 (1971-10-01), Thomas
patent: 3666915 (1972-05-01), De Napoli
patent: 3701882 (1972-10-01), Wada et al.
patent: 3705974 (1972-12-01), Nilsson
patent: 3858029 (1974-12-01), Walter
patent: 4253013 (1981-02-01), Mabuchi
patent: 4298787 (1981-11-01), Barradas

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