Cordless curling iron with separate electric heating station

Details Cordless curling iron with separate electric heating station Cordless curling iron with separate electric heating station

1987-06-19

1989-02-07

Bartis, Anthony

Electric heating

Heating devices

Tool or instrument

132 7, 132 9, 132233, 219225, 219241, 219242, 219385, 219495, 219521, H05B 102, A45D 416, A45D 236

Patent

active

048033413

DESCRIPTION:

BRIEF SUMMARY
This invention relates to a cordless curling iron. From German published patent application DE-A1-31 37 545 a cordless curling iron having a separate heating station is already known in which the heating station includes a cavity for receiving a curling mandrel of the curling iron, the curling mandrel being adapted to be inserted therein during the heating cycle for establishing an intimate thermal contact. The heating assembly of the heating station is maintained at a predetermined desired temperature by means of an integrated thermostatic device. To avoid overheating of the curling iron during the heating cycle, the desired temperature of the heating assembly has to be identical with the maximum permissible heating temperature of the curling iron.
Such an adjustment of the temperature of the heating assembly is, however, disadvantageous with regard to the duration of the heating cycle of the curling iron. For rapid heating of the curling iron, it is desirable that the temperature of the heating assembly be significantly higher than the desired temperature of the curling iron.
With the exception of this restriction, this concept of an indirectly heated curling iron affords substantial advantages over conventional curling irons equipped with a direct heating assembly:
For one thing, it dispenses with the need for the normally present power cord which is generally quite awkward during the manipulation of the curling irons. For another thing, indirectly heated curling irons present no major cleaning problems since they have no electrical or mechanically delicate components. Moreover, the use of indirectly heatable curling irons positively eliminates accident hazards as they may occur, for example, when manipulating directly heatable electric curling irons in damp locations such as bathrooms, and the like.
Accordingly, it is an object of the present invention to provide an indirectly heatable curling iron with a separate heating station which allows simple and safe manipulation, is easy to clean and is characterized by a short heating cycle during which it is heated to a predeterminable operating temperature.
This object is accomplished by an indirectly heatable curling iron with a separate heating station.
The curling iron of the invention affords the advantage of a very short heating cycle and of permitting the heating temperature to be adjusted to a defined and reproducible value. By reason of the short heating cycles, the user can perform the hair styling operation swiftly without being interrupted by prolonged reheating phases. By suitable selection of the heating temperature of the curling iron which is adjustable to a defined and reproducible value, it is ensured that the curling iron heats neither to a temperature so high that it might cause damage to the hair nor to a temperature so low that it prevents the hair from being properly curled.
Further, it has proved to be an advantage to arrange magnetic retaining means in the neighborhood of at least one of the boundary areas of a heating assembly of the heating station or of the curling mandrel of the curling iron. This prevents direct heating of the ferromagnetic body whose Curie point substantially corresponds to the desired temperature of the curling iron. In an advantageous embodiment of the invention, this effect is aided by the absence of direct thermal communication between a magnet mounted on the heating assembly and the ferromagnetic body. It is thus ensured that the ferromagnetic body substantially assumes the temperature of the curling mandrel of the curling iron.
An embodiment of the invention has proved to be particularly advantageous in which the gravitational force is made use of as the first force acting in opposition to the magnetic force. The gravitational force being available "for free", it dispenses with the need for additional spring or resilient elements. This embodiment provides economy of manufacture in the implementation of the invention.
To avoid potential malfunction in the event of improper handling of the heating station,

REFERENCES:
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patent: 2584999 (1952-02-01), Flournoy
patent: 3415254 (1968-12-01), Brock et al.
patent: 3654428 (1972-04-01), Talge et al.
patent: 3665939 (1972-05-01), Laing
patent: 3881086 (1975-04-01), Fleischhauer
patent: 3946196 (1976-03-01), Waters et al.
patent: 4109667 (1978-08-01), Quirk
patent: 4499355 (1985-02-01), Walter
patent: 4691095 (1987-09-01), Barowski et al.

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