Cookware surface

Abstract

A cookware article with a textured surface and a method for producing the same. The method comprising performing a first forging step to create a three-dimensional body of the article of cookware from a sheet material having first and second opposing major surfaces, wherein the three-dimensional body comprises a concave form in which the first surface comprises an internal surface and the second surface comprises an external surface, performing a second forging step on the three-dimensional body to impart a surface texture over the internal surface, applying a non-stick coating to the textured internal surface.

Description

A cookware article having a textured surface and a method for manufacturing the cookware article. The method includes: performing a first forging step to form a three-dimensional body of the cookware article from a sheet material having a first main surface and an opposite second main surface, wherein the three-dimensional body includes a concave shape, wherein the first surface constitutes an inner surface and the second surface constitutes an outer surface; performing a second forging step on the three-dimensional body to form a surface texture portion on the inner surface; and applying a non-stick coating to the textured inner surface. Abstract

Claims

Claims1 . A method for producing an article of cookware with a textured internal surface comprising: performing a first forging step to create a three-dimensional body of the article of cookware from a sheet material having first and second opposing major surfaces, wherein the three-dimensional body comprises a concave form in which the first surface comprises an internal surface and the second surface comprises an external surface;; performing a second forging step on the three-dimensional body to impart a surface texture over the internal surface; roughening the internal surface texture to receive a surface coating; applying a non-stick coating to the internal surface with a thickness so that the surface texture is present after coating.

2. The method of claim 1 , wherein the second forging step imparts the surface texture over at least 90% of the internal surface of the concave three- dimensional body.

3. The method of any preceding claim, wherein the second forging step creates the surface texture over the entire internal surface of the three- dimensional body.

4. The method of any preceding claim, wherein the non-stick coating forms a layer of 50pm or less over the internal surface.

5. The method of any preceding claim, wherein the second forging step comprises pressing a die onto the internal surface, the die having a predetermined pattern on its outer surface that is an inverse of the surface texture imparted onto the internal surface of the three-dimensional body.

6. The method of any preceding claim, wherein the first forging step forms a base and side wall of the three-dimensional body, and wherein the secondforging step creates the surface texture on the internal surface over both the base and side wall.

7. The method of claim 6, wherein the texture is present over the internal surface where the base meets the side wall, e.g. over a curved transition between the base and side wall.

8. The method of any preceding claim, wherein the roughening of the surface texture creates microscopic texture therein on a length scale that is at least an order of magnitude smaller than the surface texture.

9. A cookware article comprising: a three-dimensional body of concave form having internal and external surfaces, the body comprising an underlying metallic material and a nonstick coating layer over the internal surface; a surface texture pressed into the underlying metallic material of the body, the surface texture comprising a pattern of discrete raised portions spaced by valleys therebetween, said pattern extending over the internal surface; the non-stick coating layer overlying the textured surface, the non-stick coating layer having a thickness such that the pattern of the surface texture is present in the surface coating.

10. The cookware article of claim 9, wherein the texture comprises an irregular pattern.11 .The cookware article of claim 9 or 10, wherein the surface texture is continuous over the entirety of the internal surface.

12. The cookware article of claim 9 or 10, wherein the plurality of raised portions are each surrounded by a valley.

13. The cookware article of claims 9 to 12, wherein the valleys form a continuous network over the surface texture.

14. The cookware article of claims 9 to 13, wherein the raised portions and valleys have curved sides.

15. The cookware article of claims 9 to 14, wherein the raised portions comprise irregular shapes in plan.

16. The cookware of article claims 9 to 15, wherein the raised portions have a width in the range of 0.5mm to 5mm.

17. The cookware article of claims 9 to 16, wherein the height difference between any raised portion and any valley is in the range of 0.2mm to 0.8mm, or 0.3mm to 0.5mm.

18. The cookware article of claims 9 to 17, wherein the raised portions are arched in sectional profile.

19. The cookware article of claims 9 to 18, wherein the underlying metallic material comprises aluminium.

20. The cookware article of claims 9 to 19, wherein the surface texture of underlying metallic material has a roughened surface at the interface with the non-stick coating.

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