Vacuum retention gasket splicing
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United States of America Patent
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Mar 25, 1997
Grant Date -
N/A
app pub date -
Dec 21, 1994
filing date -
Dec 21, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to a method of splicing a hollow gasket such that the final welded joint remains highly flexible and does not impair the fluid flow between the two spliced sections. The two gasket sections having identical multiple-chambered cross-sections are held in a splice mold by precision tooling and air drawn through small holes in the splice mold by a vacuum pump. Heat is applied to each end of the gasket sections and the ends are brought into contact with one another. As the ends cool, a welded joint is formed. The integrity of each individual chamber is maintained so that, when spliced, the two gaskets sections become one, with the chambers forming continuous channels. The continuous channels create a higher insulating quality than if the channels were blocked at the welded joints. Further, corners spliced in this manner remain as flexible as the adjoining gasket sections. Magnetic strips may be inserted into selected channels to assist in maintaining the proper position of the gasket when in use as well as provide a magnetic latch. A common application for such a gasket is for use with a refrigerator door.
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