Expandable Roller

a roller and expandable technology, applied in the field of expandable rollers, can solve the problems of difficult to release curled hair from the roller without adversely affecting the integrity of curls, lose some degree of curling tension, etc., and achieve the effect of facilitating relative movement and reducing the amount of operating heat from the external heated rod

Inactive Publication Date: 2009-12-03
DICKSON IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0013]So that a hair roller can obtain operational heat from an external heated rod more efficiently, the rigid tube may be formed from a thermally conductive material.
[0014]To facilitate relative movement between the end members, at least one of said end members may be mounted on said rigid tube by threaded engagement.
[0015]In an exemplary embodiment, the radial expansion of the hair curling portion is at a maximum mid-way between said end members, and wherein the ex

Problems solved by technology

Although a hair roller should ideally engage tresses of hair tightly for maximum curling efficiency, it is noted that tresses of hair always lose some degree of curling tension after the tresses of hair have been wound on a

Method used

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Examples

Experimental program
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first embodiment

[0047]In another embodiment, the roller is identical to that of the first embodiment, but the rigid tube is moulded from plastics.

[0048]In yet another embodiment, the roller is identical to that of the first embodiment, but no longitudinal hair engaging protrusions extend from the end members.

[0049]In a third embodiment as shown in FIGS. 13-15, the roller 300 is identical to that of the second embodiment, but some or all of the elongate strips are formed with small protrusions distributed along the length of the strips for providing additional friction for hair retention.

second embodiment

[0050]Unless otherwise specified, features appearing in FIGS. 13-15 are designated with the same numerals of the second embodiment plus 100.

[0051]While the present invention has been explained by reference to the examples or preferred embodiments described above, it will be appreciated that those are examples to assist understanding of the present invention and are not meant to be restrictive. Variations or modifications which are obvious or trivial to persons skilled in the art, as well as improvements made thereon, should be considered as equivalents.

[0052]Furthermore, while the present invention has been explained by reference to a hair curler with a metallic cage body, it should be appreciated that the invention can apply, whether with or without modification, to hair curlers with other forms of expandable hair curling surface without loss of generality.

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Abstract

A hair roller includes a longitudinally extending hair curling portion defined between a pair of opposed end members. The hair curling portion is expandable and retractable in a radial direction with respect to the longitudinal axis of the hair curling portion, in response to relative movement of the end members with respect to each other.

Description

FIELD OF THE INVENTION[0001]The present invention relates to hair rollers and, more particularly, to hair rollers with a reconfigurable hair curling surface.BACKGROUND OF THE INVENTION[0002]A typical hair roller comprises a cylindrical roller body with a hair curling surface configured for curling hair by heated contact. In use, a hair roller is heated first and then tresses of hair are wrapped around the roller body to form curls through heat conduction. In another type of hair rollers, tresses of hair are first wrapped on a roller and heat is then applied to the hair to be curled through heating of the roller body by inserting a heated rod into an axial aperture of the hair roller.[0003]Hair curling using conventional hair rollers is essentially by application of heat and tension to the hair being curled. The curling tension applied to the hair is largely obtained by subjecting the hair being curled to conform tightly to the curvature of the roller body. Although a hair roller sho...

Claims

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Application Information

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IPC IPC(8): A45D2/14
CPCA45D2/146A45D2/2485A45D2/2464A45D2/148
Inventor CHAN, WING KIN
Owner DICKSON IND CO LTD
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