Patent 7971593 was granted and assigned to Henkel on July, 2011 by the United States Patent and Trademark Office.
The invention relates to a hair roller (1) having a central roller mandrel (3) and a partially slotted hair roller housing (2) that surrounds the roller mandrel at a distance. Said hair roller fixes the hair in the vicinity of the scalp by means of catch hooks and is positioned approximately at a right angle to the scalp in the final wound position.