Hair styling appliance for forming curls with different sizes

Patent metadata

Field	Value
Publication number	US-9901155-B2
Application number	US-201514750184-A
Country	US
Kind code	B2
Filing date	Jun 25, 2015
Priority date	Jul 2, 2014
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

The invention relates to a hair styling appliance ( 1 ) for curling and straightening hair, comprising:
a first and a second elongate jaw ( 2, 3 ) that are pivotable with respect to one another, the first jaw ( 2 ) having a first housing ( 6 ) bearing a first flat internal treatment surface ( 4 ), and the second jaw ( 3 ) having a second housing ( 7 ) bearing a second flat internal treatment surface ( 5 ), the internal surfaces ( 4, 5 ) being intended to pinch a lock of hair, at least one heating element ( 41, 51 ) intended to heat at least one internal treatment surface ( 4, 5 ).

According to the invention, the greatest width l 1 of the first housing ( 6 ) is less than or equal to 90% of the greatest width l 2 of the second housing ( 7 ), and at least one of the first housing ( 6 ) and the second housing ( 7 ) is asymmetric with respect to the median plane in longitudinal section of said first housing ( 6 ) or said second housing ( 7 ), respectively.

First claim

The invention claimed is:

1. A hair styling appliance comprising:
a first and a second elongate jaw that are pivotable with respect to one another;
the first jaw having a first housing bearing a first flat internal treatment surface;
wherein the first housing comprises at least two longitudinal edges;
the second jaw having a second housing bearing a second flat internal treatment surface;
wherein the second housing comprises at least two longitudinal edges;
wherein the internal treatment surfaces are configured to pinch a lock of hair;

at least one heating element to heat at least one internal treatment surface;
wherein the greatest width of the first housing is less than or equal to 90% of the greatest width of the second housing;
wherein at least one of the first housing and the second housing is asymmetric with respect to a median plane in a longitudinal section of said first housing or said second housing, respectively; and
wherein, in cross section, the line defined by the exterior contour of the first and second housings is a rounded curve that does not have any points of inflection.

2. The hair styling appliance of claim 1 , wherein the greatest width of the first housing ranges from about 75% to about 85% of the greatest width of the second housing.

3. The hair styling appliance of claim 1 , wherein, in the closed position of the jaws, the median plane in longitudinal section of the first housing is parallel to and separate from the median plane in longitudinal section of the second housing.

4. The hair styling appliance of claim 3 , wherein the distance between said two median planes ranges from about 5% to about 20% of the value of the greatest width of the second housing.

5. The hair styling appliance of claim 1 , wherein, in the closed position of the first and second jaws, one of the at least two longitudinal edges of the first housing is vertically aligned with one of the at least two longitudinal edges of the second housing.

6. The hair styling appliance of claim 5 , wherein the internal treatment surfaces of the first and second housings are substantially flat and are substantially identical to and opposite one another in the closed position, and are arranged in their respective housings adjacent to said vertically aligned edges.

7. The hair styling appliance of claim 5 , wherein each of said two longitudinal edges is provided with at least one bar that protrudes towards the interior of the housing.

8. The hair styling appliance of claim 1 , wherein the width of each internal treatment surface ranges from about 40% to about 60% of the greatest width of the first housing.

9. The hair styling appliance of claim 1 , wherein the second housing comprises a comb or a brush that is oriented towards the first housing and adjacent to the second internal treatment surface.

10. The hair styling appliance of claim 9 , wherein the first housing has a groove formed in its interior contour and arranged, in the closed position, approximately adjacent to the comb or the brush of the second housing.

11. The hair styling appliance of claim 1 , wherein the first jaw comprises a first handle and the second jaw comprises a second handle, wherein the first handle and the second handle each have a width less than the greatest width of the first housing.

12. The hair styling appliance of claim 1 , wherein the exterior surfaces of the first housing and the second housing are substantially smooth.

13. A method of using a hair styling appliance to curl the hair, wherein curling the hair forms curls of at least two different sizes, said appliance comprising:
a first and a second elongate jaw that are pivotable with respect to one another;
the first jaw having a first housing bearing a first flat internal treatment surface;
the second jaw having a second housing bearing a second flat internal treatment surface;
wherein the internal treatment surfaces are configured to pinch a lock of hair;

at least one heating element to heat at least one internal treatment surface;
wherein the greatest width of the first housing is less than or equal to 90% of the greatest width of the second housing;
wherein at least one of the first housing and the second housing is asymmetric with respect to a median plane in longitudinal section of said first housing or said second housing, respectively; and
wherein, in cross section, the line defined by the exterior contour of the first and second housings is a rounded curve that does not have any points of inflection;
said method comprising:
surrounding the first housing with a lock of hair;
closing the appliance close to the scalp and keeping it immobile for a few seconds;
sliding the appliance towards the free end of the lock in order to demould the lock; and
repeating the steps with the second housing.

14. A method of using a hair styling appliance to curl the hair, wherein curling the hair forms curls of at least two different sizes, said appliance comprising:
a first and a second elongate jaw that are pivotable with respect to one another;
the first jaw having a first housing bearing a first flat internal treatment surface;
the second jaw having a second housing bearing a second flat internal treatment surface;
wherein the internal treatment surfaces are configured to pinch a lock of hair;

at least one heating element to heat at least one internal treatment surface;
wherein the greatest width of the first housing is less than or equal to 90% of the greatest width of the second housing;
wherein at least one of the first housing and the second housing is asymmetric with respect to a median plane in longitudinal section of said first housing or said second housing, respectively; and
wherein, in cross section, the line defined by the exterior contour of the first and second housings is a rounded curve that does not have any points of inflection;
said method comprising:
inserting a lock of hair between the two housings,
closing the appliance around a portion of the lock of hair closest to the scalp then sliding the appliance along the lock to the end of the lock;
winding the lock around both housings, while keeping the appliance closed around the end of the lock;
holding the position for a several seconds, and
unwinding the lock.

Assignees

• Oreal

Inventors

• Nuzzo Stefania
• Lapize Sandy
• Ngo Eddy
• Fereyre Regis
• Maisonneuve Martial

Classifications

• A45D2/002 Primary

  with combs · CPC title

• A45D1/18

  with combs (A45D1/02 takes precedence) · CPC title

• A45D1/06 Primary

  with two or more jaws (A45D1/02 takes precedence) · CPC title

• A45D1/04 Primary

  by electricity · CPC title

• A45D7/02

  thermal · CPC title