Electric heating – Heating devices – Tool or instrument
Patent
1997-10-15
2000-07-04
Walberg, Teresa
Electric heating
Heating devices
Tool or instrument
219222, 219506, 219521, H05B 100
Patent
active
060842113
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a device for heating scissors a such as hairdressing scissors.
BACKGROUND OF THE INVENTION
The hair comprises three layers, namely the outer guard and gloss layer, which is the scaly or flakelike cuticle; a fibrous layer of spindle cells located below it, which is the actual hair shaft or so-called cortex; and finally--in the center of the hair--the core layer, or so-called medulla. This core layer is the moisture carrier for the hair. The moisture penetrates the hair from the scalp inward. If no further moisture is transferred, the hair becomes drier. The hair then behaves differently then.
A newly formed, never-cut hair strand is closed at its end and is thus protected against a loss of moisture. After cutting--over the approximately seven-year life of a single hair strand--however, there is continuously an open end that allows moisture to be lost. This can cause drying and splitting, especially with long hair.
For a rather long time, it has been known to preserve the natural moisture content in hair whose ends have been opened by cutting by sealing it again (cauterizing it) afterward. This has been done for instance using a lighted candle or a gas flame. However, this causes ugly scorched tips at the end of the hair and generally also causes thermal damage to the hair shaft. The attempt has already been made to cut hair using an electric glow wire (French Patent Disclosure FR 26 12 381). However, this greatly limits the flexibility in how to design the hair cut. Moreover, it is very inconvenient. The attempt has also been made to create directly heated scissors and knives (see published French Patent Applications FR 25 32 878 A1 and FR 24 07 797 A1; U.S. Pat. No. 3,892,028; and International Patent WO 92/00688). However, connecting the scissors to the supply lines and embodying the heating devices in the scissors themselves is extremely complicated, and the devices are difficult to manipulate and expensive to design. This cauterizing of the hair has therefore not yet been commercially used.
SUMMARY OF THE INVENTION
The object of the invention is to furnish a device that enables sealing of the ends of the hair in a simple way when hair is being cut.
According to the present invention this object is attained in by the provision of a unit having a scissors receptacle, suitable as holders for inserting scissors, and heating devices, and in which the heating device surrounds the space intended for receiving the scissors.
The present invention accordingly heats the scissors--preferably at least two pairs of scissors in alternation--in a device for heating scissors to be provided separately, from which the scissors are taken and used for cutting. The heating is done to a temperature that seals the cut ends of the hair during cutting. This occurs at a temperature of approximately 150.degree. C. or higher. To insure that this will last for approximately 6 to 12 seconds, the scissors should be heatable in a device for heating scissors up to an--adjustable--temperature between 150.degree. C. and 250.degree. C.
In one further feature it is provided that a unit has at least two receptacles for scissors, in which in alternation one pair of scissors is heated while another is being used, so that an operator always has one pair of heated scissors available.
Another advantageous feature of the present invention provides that the unit is carried on a belt or the like on the body of the operator, so that the scissors are always ready at hand in an ergonomically appropriate way. Naturally, the unit may also be embodied as a stand-type unit, or both possibilities (suspension and standing) can be combined by means of a suitable embodiment.
Exemplary embodiments of the present invention and their advantageous further development will be described below in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1, shows a device for heating scissors including a holster;
FIG. 2, shows the device for heating the scissors of FIG. 1 on a l
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Catalogue Rohstoff und Produkt by Dr. Kolitz, pp. 81-87.
Patel Vinod D.
Walberg Teresa
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