Plastic and nonmetallic article shaping or treating: processes – With step of making mold or mold shaping – per se
Patent
1994-04-01
1995-06-06
Ryan, Patrick J.
Plastic and nonmetallic article shaping or treating: processes
With step of making mold or mold shaping, per se
264231, 264230, 264324, 264313, 425325, 425395, B29C 3340
Patent
active
054220645
ABSTRACT:
This method for forming a measuring diaphragm which measures the volume of a passing gas with high accuracy and has a prolonged service life because the diaphragm moves completely in the same way to both sides of the measuring vessel in which it is fixed. The measuring diaphragm when produced in quantity has an undulating structure of high uniformity and variation in quality of the diaphragm is small. The method of preparation of the measuring diaphragm includes providing each of a pair of molds with a flat part at the center and providing a multiplicity of grooves and ribs at the periphery parallel to an edge of the central part; placing the grooves and ribs in such a way that the grooves of one mold fit the ribs of the other mold, such that the depth of a groove on a mold is larger than the height of a rib on the other mold which fits the groove; pressing an elastomer composite sheet material between the molds, such that one side of the pressed elastomer composite sheet material is pressed to the surface of the ribs of the mold and fixed there with tension and the other side of the elastomer composite sheet material is out in contact with the surface of the grooves of the mold; and then heating the elastomer composite sheet material to crosslink the elastomers composite sheet and to form a desired shape.
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patent: 4701293 (1987-10-01), Mead
Dixon Merrick
Ryan Patrick J.
Toyo Tire & Rubber Co., Ltd.
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