METHOD FOR MAKINGS POTS AND PANS, EQUIPPED WITH A MULTI-LAYER COATING OF NON-STICK MATERIAL

Technical field

This invention relates to a method for making non-stick pots and pans. Background art

The prior art for making non-stick pots and pans involves coating the walls of the cooking cavity of the pots and pans by applying and baking in an oven several successive layers of a substance that has anti-friction properties, known as polytetrafluoroethylene (PTFE).

Before the first use of such pots and pans, some manufacturers recommend that users should grease the PTFE coating by wiping it with a wad of cotton soaked with edible oil.

The purpose of the edible oil is to fill the micro-pores of the layer of PTFE and to increase its non-stick capacity, as well as making it even more impermeable to the foods cooked.

Not all users always grease the pot before use. That may be because of a lack of attention or care, or because of a diet-related choice based on extreme attempts to minimise oil and grease consumption in the preparation of foods, which often is also consistent with the decision to purchase the type of pots and pans which are the subject matter of this invention.

Such an omission is the reason for the disadvantage that may be encountered, consisting of the fact that with repeated use, in the pot which has not been initially prepared as indicated above, the layer of non-stick material tends to see its pores gradually saturated with the absorption and infiltration of cooking fluids that in the medium-/long-term may make cleansing of the pot less and less effective, being able to affect its sanitisation, influence the flavour of the foods, and even the outer quality of the appearance of the non-stick layer. Disclosure of the invention

The technical purpose of this invention is to overcome such disadvantages.

As part of that purpose, the primary aim of the invention is to devise a solution that can be implemented in the pot from the time of its production.

Brief description of the drawings

In accordance with that aim, the solution proposed consists of a production method whose technical features are clearly indicated in the claims herein, and whose advantages are more apparent in the detailed description which follows, with reference to the accompanying drawings, which illustrate a preferred embodiment by way of example only and without limiting the scope of the invention, in which:

- Figure 1 is a schematic partial cross-section elevation view of a pot;

- Figure 2 is an enlarged detail of the pot of Figure 1;

- Figure 3 is a schematic block diagram of several essential steps of a method for making a pot of the type illustrated in Figure 1. Preferred embodiments of the invention

With reference to the accompanying drawings, in Figure 1 , the numeral 1 denotes a pot of the known type comprising a cooking cavity 2 provided with a thin coating 3 made of non-stick material having its own multi-layer structure.

For the production of such a type of pot or pan equipped with a coating made of non-stick material for the cooking cavity 2, the Applicant applied a production method that comprises forming said coating 3 in multiple layers 4, 5 and 6, which are superposed and applied to the pot 1 one after another [Figure 2],

In practice, the inner surface 7i of the wall 7 of the cooking cavity 2 of the pot 1 is subjected to forming of the coating 3 which comprises [as schematically illustrated in Figure 3] the cyclical repetition of a step of application of suitable covering substances, and a subsequent drying and baking in an oven of the substance applied, steps that in sequence are repeated several times, each time using the most suitable materials, depending on the number of layers desired for construction of the coating of the inner cavity 2 of the pot 1.

Application of the covering layers may be performed with various methods, which in themselves are known, including, for example but without limiting, spraying or rolling of suitable liquid substances; or even methods for depositing covering powders.

The invention described above is susceptible of evident industrial application. It may also be modified and adapted in several ways without thereby departing from the scope of the appended claims. Moreover, all details of the invention may be substituted by technically equivalent elements.

In accordance with what is indicated above, it may be highlighted, more particularly - and still being explanatory and non-limiting - that the non-stick material used may be of various types, for example it may be plastic as happens when the non-stick material is in the families of polytetrafluoroethylenes (PTFE), or mineral if for example ceramic materials are used.