DK160911B - CURLER TO BOOK HER - Google Patents

Abstract

1. Hair curler with an elongate winding body (14), on which the hairs are to be fixed with the aid of a tensioning band (2, 3, 13) to be stretched between the longitudinal ends (15, 16) of the winding body at spigots (11, 12), wherein the spigots (11, 12) are during casting moulded to the ends of the tensioning band and constructed as coupling and closure elements for insertion in receptacle holes (17, 18) provided at the end faces of the winding body, characterised thereby, that the winding body (14) is hollow-moulded and the openings, which arise at its end faces due to mould cores, are used as receptacles holes (17, 18) for the spigots (11, 12) and that the tensioning band (2, 3, 13) is produced by an injection-moulding process from a rubber-elastic polyurethane (PUR) to be processed thermoplastically and the elasticity of the material of the tensioning band (2, 3, 13) is to be augmented by elasticity of shape, in particular through moulded-in holes (5, 7) with rim strips (4, 6) of substantially uniform width.

Description

in

DK 16091 1 B

The present invention relates to a hair curler of the kind specified in the preamble of the claim.

Such a curler is known from U.S. Patent No. 2,525,750.

5

The curler bodies are generally made substantially cy-1 shaped with the long end of the cylinder hyperboloid shaped growing in diameter. In use, the hairs are wrapped around the curler body and the wound hair is fixed by means of a clamping band which, under a certain elastic stretch, must be coupled to the length ends of the curler body.

In order to attach the wound hair to the curler body of the aforementioned kind, extruded rubber bands are generally used, which after parting the extrusion are to be sectioned and provided with punching holes in a further work process. Apart from the manufacturing costs, one drawback of these known straps is that no chemical neutrality is guaranteed by a rapid "aging" in the wave fluid.

20

This prior art hair curler known from US Patent No. 2,525,750 has a molded strap with slots that do not penetrate the strap prior to the first use of the hair curler. Furthermore, the hair curler according to US Patent No. 2,525,750 25 is designed as a cylindrical sleeve of absorbent material such as cotton or paper.

It is an object of the present invention to reduce the cost of manufacturing the straps and to increase the chemical resistance of the straps 30.

This object is met by the fact that the initially mentioned curlers according to the invention are peculiar to what is stated in the characterizing part of the claim.

In the invention, it is possible to obtain a tension band only by spraying elastic plastics materials whose elasticity is 35 2

DK 16091 1 B

sufficient for coupling it with the curler body wound with the hair, the material of which is chemically neutral to the liquid and the corrugating agent, respectively, and which can be stretched with a small amount of force sufficient for practical use. In this way, the material elasticity is supplemented by the injected holes.

Since the curler body is hollow-sprayed, it has a reservoir for a waveguide in the form of a cavity extending parallel to the center axis. In order to produce this cavity during spraying, in addition to the outer mold trays, additional internal injection molding tools such as cores or sliders are required. The latter tools provide holes at the long ends of the curler body that are not to be wrapped with the hair, which holes must be closed with the pin of the strap, thereby preventing the liquid waveguide from flowing out from the curler bodies. Since the pins provided for attaching the strap are formed on the strap in one operation at the injection molding with a mold to close the (core) 20 holes remaining at the longitudinal ends of the curler body, the cost of manufacturing and replacing the hitherto ordinary closure plugs is saved to it. hollow curler body. The spraying of the pins as coupling and locking means for insertion into the holes at the longitudinal ends of the curler body provides practically no additional cost.

25

As material for the strap, the following are considered:

Thermoplastic polyurethane elastomer prepared by reacting a mixture of butanediol and a polymeric diol having a molecular weight of 800-3000 on an ester and / or ether basis with diphenyl methane diisocyanate, selecting the proportions of the starting materials according to the prior art so as to form the resulting product after thermoplastic machining at room temperature has a Shore hardness according to DIN 53505 from 75-85.

On the basis of the schematic representation of exemplary embodiments, further details of the subject matter of the invention are explained below. The drawing shows 35 3

DK 160911 B

FIG. 1 and 2 are variously designed buckles seen from above; FIG. 3 shows a strap with sprayed pin and 5 fig. 4 a curler body with attached strap.

FIG. 1 and 2 show two bucket bands 2 and 3, whose material elasticity is supplemented by mold elasticity. The FIG. 1, the strap 2 shown consists essentially of the strip strip 4 with 10 from the tip in series of arbor-pane panes 5. Similarly, the strap 3 shown in FIG. 2 of the edge strips 6 with the following in series following circular holes 7. At the longitudinal ends, the straps 2 and 3 have fastening pins 11 and 12, with <d «r 'at the fastening step 11. can be placed a vulture ash 15 m.

The The pins 11 and 12 shown in Fig. 3 are formed immediately by the manufacture of the tension band 13 * by the injection molding method. in cross section, the clamping band 13 shown in cross section may have a 20 or other embodiment similar to that of FIG. 1 or 2. The strap 13 with integral pins 11, 12, when used in the curler body 14's (see Fig. 4) at the end, holes 17, 18. The curler body 14 is sprayed or otherwise shaped as a hollow body so that at its longitudinal ends 15 and 16, e.g. from a core or a slider, holes 17 and 18. remain in these holes 17, 18 as pins 11, 12 formed as coupling and locking parts to close openings 17, 18 and prevent outflow of a waveguide used if necessary. at the longitudinal ends 15, 16. The pins 11, 30 12 are formed simultaneously and in one working process by injection molding of the strap 13 shown in FIG. 3. In FIG. 4 is shown how the strap 13 with pins 11 and 12 formed thereon is to be laid around the curler body 14, how the pins 11, 12 are to be locked in the holes 17, 18 and how the holes 17, 18 are thereby closed.

The strap of the invention is to be made of a sustained elastic, chemically opposed to the waveguide used.

Claims (1)

DK 160911 B neutral and with relatively small force stretchable plastic. In the course of experiments, it has been found that the continuous supply of thermoplastic polyurethane - "elastomer" by the company Elastogran GmbH, Lemforde, under the trade name "Elastollan" ®, fulfills the requirements set out above. polyurethane to be thermoplasticly processed Patent Claim 10 ————————————————————————————— Hair curler with an elongated curler body (14), to which the hairs must be secured by a strap ( 2,3,13), which are to be tensioned between the length ends (15,16) of the curler body, by means of pins, which pins (11, 12) are immediately formed on the strap, by the injection molding and are formed as coupling and locking means for inserting into the holes (17, 18) at the longitudinal ends (15, 16) of the curler body, characterized in that the curler body (14) is hollowed out and the receiving holes (17, 18) formed by means of mold cores used for the pins (11, 12) and the clamping band (2, 3, 13) is made according to the injection molding method of a rubber elastic polyurethane (PUR) to be thermoplastic processed and that the material elasticity of the strap (2, 3, 13) is supplemented with mold elasticity, especially by holes (5, 7) sprayed therein with substantially uniform wide strips. (4, 6). 30 35