Hair styling appliance

1. A heating plate for a hair styling appliance, the heating plate having a length a depth and a width, the heating plate comprising a first continuous hair facing surface and a second surface opposite the first surface, the heating plate comprising at least one groove which runs across the width of the heating plate, each groove extends from the second surface towards the first surface and allows the heating plate to flex.

2. The heating plate of claim 1 , wherein there are a plurality of grooves which run across the width of the heating plate, each groove extends from the second surface towards the first surface and allows the heating plate to flex.

3. The heating plate of claim 1 , wherein the first surface is flat.

4. The heating plate of claim 1 , which is monolithic.

5. The heating plate of claim 1 , wherein the first surface is rectangular in shape.

6. The heating plate of claim 1 , formed from Beryllium Copper.

7. The heating plate of claim 1 , further comprising a layer which is formed between the first surface and the top of each of the grooves.

8. The heating plate of claim 7 , wherein the layer has a depth of from 0.001 mm to 1 mm.

9. The heating plate of claim 8 , wherein the depth of the layer is from 0.01 mm to 0.1 mm.

10. The heating plate of claim 8 , wherein the ratio between the depth of the layer and a depth of the heating plate is 1:60.

11. The heating plate of claim 1 , wherein there are from 20 to 100 grooves.

12. The heating plate of claim 1 , wherein walls are present on each side of each groove and the walls define the grooves.

13. The heating plate of claim 12 , wherein the walls are wider than the grooves.

14. The heating plate of claim 1 , further comprising a first channel which runs along the length of a side of the heating plate.

15. The heating plate of claim 14 , having a first channel arranged on both sides of the heating plate.

16. The heating plate of claim 14 , wherein the first channel(s) house a first strip of material which is less conductive than the remainder of the heating plate.

17. The heating plate of claim 14 , further comprising a second channel which runs along the length of a side of the heating plate.

18. The heating plate of claim 17 , having a second channel arranged on both sides of the heating plate.

19. The heating plate of claim 17 , wherein the second channel(s) house a resilient member.

20. The heating plate of claim 19 , wherein the resilient member is a strip of material which runs the length of the second channel(s).

21. The heating plate of claim 1 , further comprising an elongate recess formed in the second surface.

22. The heating plate of claim 21 , wherein the elongate recess extends the full length of the heating plate.

23. A hair straightener comprising:

a heating plate for a hair styling appliance, the heating plate having a length a depth and a width, the heating plate comprising a first continuous hair facing surface and a second surface opposite the first surface, the heating plate comprising at least one groove which runs across the width of the heating plate, each groove extends from the second surface towards the first surface and allows the heating plate to flex.

24. The hair straightener of claim 23 , further comprising first and second arms which are connected such that they can move between an open position and a closed position for the purpose of gripping hair.

25. The hair straightener of claim 23 , wherein at least one of the arms has a heating plate.

26. The hair straightener of claim 25 , wherein both arms have a heating plate.

27. The heating plate of claim 9 , wherein the ratio between the depth of the layer and a depth of the heating plate is 1:60.