Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Patent
1986-06-18
1989-03-07
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
264241, 264321, 277235B, B29C 5902
Patent
active
048104540
ABSTRACT:
An improved gasket having multiple regions of different densities and thicknesses and a method of manufacturing same. First and second laminae of compressible gasket facings can be utilized to form a finished gasket or gasket blank having two different density regions. The first lamina has a shape which corresponds to the overall shape of the gasket. The second lamina has a shape which corresponds only to those regions of the gasket for which a higher density is desired. The first and second laminae are aligned with one another in overlapping planar relationship and pressed together by a die having opposed flat surfaces. When so pressed, the second lamina is pressed into and combined with the first lamina so as to form a unitary gasket having flat facing surfaces and two different density regions. The higher density region is defined by that portion of the first lamina material which was overlapped by the second lamina during the pressing operation, while the lower density region is defined by the non-overlapped portion of the first lamina. Multiple laminae of the gasket facings having different shapes may be utilized in this manner to form gaskets or gasket blanks having additional regions of different densities.
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Dana Corporation
Kuhns Allan R.
Silbaugh Jan H.
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