Device for use in straightening or relaxing hair, and method therefor
US4403622A · kind A · utility
Inventor
Key dates
| Filing date | Jul 28, 1982 |
| Grant date | Sep 13, 1983 |
| Priority date | — |
| Expiry date | Jul 28, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA45D2/001
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
This invention relates to a device for use in straightening or relaxing overly-curly or wavy, unmanageable hair, using caustic compositions which can irritate the scalp or skin if brought into contact therewith. The device includes a planar base member or board, adjustable for head size and hair length, with means for covering with paper or similar material which overlaps the top edge of the board. The board covered with the paper is placed next to the scalp and the hair overlaps the board and paper at the top edge. The paper is cut off at a distance from the length of a lock of hair placed thereupon. The relaxing composition is then applied to the lock of hair and worked into the hair for suitable time, as determined by the operator. The board is then removed and the process repeated for another lock of hair.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.