US4819674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curly hair correcting iron
Assignee: Individual
•
Filing: 1987-03-04
•
Granted: 1989-04-11
•
Expires: 2007-03-04
Abstract
Abstract This invention relates to a curly hair correcting iron for correcting natural curly hair into straight hair. The iron comprises two rods containing therein heaters, respectively, one rod having its surface provided with two spaced rows of projections which are triangular or semicircular in section, the other rod having its surface likewise provided with a row of projections which also are triangular or semicircular in section so as to be positioned between the two rows of projections on the first rod, whereby when hair is sandwiched therebetween it is curved into a U-shape or a V-shape. The hair is held and pulled in the direction of the hair end thereby exerting strong drawing, heat and tension on the hair to extend it. To dampen pressure, it is preferable that a resilient layer be pasted onto the rod surface, and to dampen the action of heat to enhance the efficiency, it is desirable that the resilient layer be formed of a material having a far infrared radiation.
Inventors
- 👤 Toyosaku Takimae
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:18
CPC Classifications
A; A45; A45D; A45D2/00; A45D2/001; A45D1/00; A45D1/02; A45D1/04; A45D2/36
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
212 words
A hair straightening iron comprising a first and second rod each having a heater therein and a substantially planar inner surface, said first and second rods being connected at one end thereof with said planar inner surfaces being each other in a manner such that a plurality of curly hairs can be held therebetween laterally to said first and second rod, said first rod having at least one row of continuous projections, each projection extending longitudinally with a substantially uniform height along said first rod substantially along the central axis of said planar inner surface, at least a pair of first planar heat-resistant cushion layers being provided upon said planar inner surface at both sides of said at least one row of continuous projections, and second rod having at least two spaced projections, each of said projections extending longitudinally with a substantially uniform height along said second rod and each being located substantially spaced from said at least one row of continuous projections and at least a second planar heat-resistant cushion layer being provided upon said planar inner surface of said second rod positioned between said two spaced projections, wherein each of said first and second planar heat-resistant cushion layers has a substantial width such that hairs held therebetween can be straightened.
Claim 2
Dependent Claim
212 words
A hair straightening iron comprising a first and second rod each having a heater therein and a substantially planar inner surface, said first and second rods being connected at one end thereof with said planar inner surfaces being each other in a manner such that a plurality of curly hairs can be held therebetween laterally to said first and second rod, said first rod having at least one row of continuous projections, each projection extending longitudinally with a substantially uniform height along said first rod substantially along the central axis of said planar inner surface, at least a pair of first planar heat-resistant cushion layers being provided upon said planar inner surface at both sides of said at least one row of continuous projections, and second rod having at least two spaced projections, each of said projections extending longitudinally with a substantially uniform height along said second rod and each being located substantially spaced from said at least one row of continuous projections and at least a second planar heat-resistant cushion layer being provided upon said planar inner surface of said second rod positioned between said two spaced projections, wherein each of said first and second planar heat-resistant cushion layers has a substantial width such that hairs held therebetween can be straightened.
Claim 3
Dependent Claim
24 words
A hair straightening iron according to claim 1, wherein said heat-resistant cushion layer is made of a material having a far infrared radiation function.
Claim 4
Dependent Claim
21 words
A hair straightening iron to claim 1, wherein said first rod further having a comb longituinally at one side end thereof.
Claim 5
Dependent Claim
16 words
A hair straightening iron to claim 1, wherein each said projection has substantially a triangular cross-section.
References Cited (Backward Citations)
US853349A
Cited
US1465838A
Cited
US1605540A
Cited
US1694672A
Cited
US1572161A
Cited
US1593055A
Cited
US1642888A
Cited
US1793061A
Cited
FR2281735A1
Cited
US4209685A
Cited
FR2310105A1
Cited
US4029110A
Cited
US4242567A
Cited
US4464562A
Cited
US4479047A
Cited
US4549560A
Cited
US4602143A
Cited
US4739151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |