The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 1990
Filed:
Jan. 16, 1990
Applicant:
Inventors:
Frank Seja, Darmstadt, DE;
Rupert Zang, Grossostheim, DE;
Assignee:
Wella Aktiengesellschaft, Darmstadt, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A45D / ;
U.S. Cl.
CPC ...
132121 ; 132123 ; 132119 ; 15184 ;
Abstract
In a hair curling rod having retractable bristles passing through apertures in a cylindrical body for winding up the hair and a device for directing a stream of heated air through the outlet apertures, the bristles or prongs are retractable independency on the temperature of the heated air stream. Preferably, the bristles are secured at one thereof to a movable support controlled by a temperature dependent element of a shape-memory alloy situated in the stream of heated air to expand or contract in response to predetermined temperatures.