Textiles: ironing or smoothing – Smoothing implements – Flatirons
Patent
1995-06-21
1997-04-15
Izaguirre, Ismael
Textiles: ironing or smoothing
Smoothing implements
Flatirons
29904, 29DIG32, D06F 7538
Patent
active
056198132
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a soleplate for an iron, the soleplate comprising a casting having a metal ironing cover fixed thereon by fixing means.
PRIOR ART
The casting of an iron is a part which is generally made of aluminum, and which has a metal cover mounted directly thereon to form the ironing soleplate. It is already known that a stainless steel metal cover can be mounted on the aluminum casting and can be fixed by means of a silicone adhesive. Fixing may be improved by clipping the periphery of the cover onto the soleplate. To make such an ironing soleplate, it is necessary to machine some of the surfaces of the casting prior to fixing on the metal cover. As a result, making such an iron soleplate involves various steps that increase the final cost of the product. Furthermore, because of large differences between the coefficients of thermal expansion of the aluminum casting and of the stainless steel metal cover, the strength and the structural integrity of the soleplate deteriorate over time. This gives rise to play between the various layers, and to progressively worsening heat transmission during the life of the iron.
Admittedly, alternatives or improvements, such as increasing the relative thickness of the stainless steel sheet, do indeed improve the stability of the soleplate over time to some extent, but they also reduce heat transfer, and clearly they also increase the cost of the finished product.
Naturally, co-laminated materials are also well known, and they are already used in particular in automobile construction. In that field, co-laminated materials of the two-layer aluminum-and-stainless steel type are used because of the anti-corrosion properties of stainless steel and because of its pleasing appearance.
Aluminum-and-stainless steel type co-laminated materials are also used to make the bottoms of some kinds of saucepans. Such materials are used for that purpose because of the heat diffusion provided by aluminum and because of the appearance provided by the outer layer of stainless steel, but no concern is given to the large difference between the respective coefficients of thermal expansion of those two co-laminated materials, which difference gives rise to a well known effect whereby the bottom of the saucepan bulges. Because of the methods of heating that are used, and in view of the relative unimportance of the heat transmission factor for such cooking utensils, this phenomenon whereby the bottom of the saucepan bulges and the structure of its bottom becomes somewhat spoiled has always been accepted.
In order to make soleplates for irons, it is also known that layers of different metals can be assembled together by means of solid phase bonding. Such soleplates are described in Document FR-A-1 502 451 and they are associated with an additional layer of "bonding" metal which is heated to its melting point so as to obtain metallurgical bonding when the casting of the iron is cast on the soleplate. Document FR-A-1 502 451 also describes a method of making a soleplate for an iron and of fixing it to the casting of the iron while said casting is being cast. Such a method suffers from significant drawbacks, e.g. the complexity and the cost of the means required to implement it.
DESCRIPTION OF THE INVENTION
An object of the present invention is to remedy the above-mentioned problems encountered in making soleplates for irons, and to provide a novel soleplate which is simpler to make and which does not require any surface preparation, while retaining good heat exchange properties and without any significant deformation.
Another object of the invention is to provide a soleplate for an iron, in which thermal expansion is accommodated so as to guarantee a long life-span for the soleplate, as well as good quality ironing.
Another object of the invention is to provide an iron in which it is particularly simple and cheap to fix the metal cover to the casting.
Another object of the invention is to provide a novel use for co-laminated materials in the field of househol
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patent: 68178 (1867-08-01), Fraser
patent: 2298113 (1942-10-01), Ely
patent: 2782498 (1957-02-01), Mushovic et al.
patent: 2807700 (1957-09-01), Jepson
patent: 2846793 (1958-08-01), Studer
patent: 3142916 (1964-08-01), Jacobson
Brandolini Jean-Louis
Forest Michel
Izaguirre Ismael
Seb S.A.
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