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
Reexamination Certificate
2007-09-19
2008-08-12
Rivell, John (Department: 3753)
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
C137S015190, C137S526000, C137S533250, C137S550000, C251S359000, C264S267000
Reexamination Certificate
active
07410608
ABSTRACT:
In some embodiments, a process for manufacturing a diaphragm for an air admittance valve includes disposing a first center disk into a first cavity of a first mold, the first center disk includes a hollow stem. A material is provided into the first mold, through the hollow stem and laterally outwardly beyond a perimeter of the first center disk. The material is allowed to harden to form a lateral membrane coupled to the first center disk and extending laterally beyond a perimeter of the first center disk.
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Jones & Smith, LLP
Rectorseal Corporation
Rivell John
Smith E. Randall
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