Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Reexamination Certificate
2000-07-17
2001-07-17
Paik, Sang (Department: 3742)
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
Reexamination Certificate
active
06262398
ABSTRACT:
The present invention relates to electric cooking apparatus for food which comprises, in a housing, a cooking vat of sheet metal covered on its internal and external surfaces with a heat resistant coating, mounted fixedly or removably, and electrical heating means associated with the vat and comprising a flat heating element with a serigraphically applied electrical resistance.
It is applicable particularly but not exclusively to electric deep fat fryers for cooking, in an oil bath in particular, foods such as fried potatoes, fish or meat.
It is known that for such food cooking apparatus, the cooking vat is generally made by stamping a plate of sheet aluminum or steel, and is then covered internally and externally with a heat-resistant coating, generally of enamel. As is well known, such an enamel coating applied to the internal and external surfaces of the sheet metal cooking vat, whether fixedly or removably mounted in the housing of the apparatus, permits in an advantageous way facilitating the cleaning of the vat, preventing oxidation of the sheet metal, and avoid adherence of foodstuffs to the internal surface of the vat.
In a known cooking apparatus of this type, the flat heating element with serigraphically applied electrical resistance is heated in a cutout provided in the bottom of the enamel sheet metal vat. Although this solution permits overcoming the difficulty remaining to the present time as to the technical drawbacks of serigraphically applying a heating element to a plate or sheet metal, it remains equally complicated and burdensome both as to production of the heating vat and as to the mode of securement of the heating element.
The invention has particularly for its object to overcome these drawbacks and to provide an electric heating element, of the type described above, which will be of simplified design and less costly production, whilst keeping the advantages arising from serigraphically applying the heating element, such as particularly a very rapid increase in temperature of the cooking vat and good homogeneity of the distribution of the temperature of heating.
According to the invention, the external surface of the bottom of the vat has a region which is free of coating and to which is secured the flat heating element.
Thus, the fact of removing the coating of this external zone on the bottom of the vat so as to fix the flat heating element there, hardly changes the production of a conventional sheet metal cooking vat covered internally and externally with this coating, such as an enamel sheet metal vat, and also permit a substantial saving in the material constituting the coating of the vat, in particular for mass production.
According to a preferred embodiment, the flat heating element is connected by welding or cementing on the region free from coating.
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Bois Bernard
Busquets Jean-Pierre
Moulinex (S.A.)
Paik Sang
Patel Vinod D
Young & Thompson
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