Plastic article or earthenware shaping or treating: apparatus – Means feeding fluent stock from plural sources to common...
Reexamination Certificate
2006-01-31
2006-01-31
Smith, Duane (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Means feeding fluent stock from plural sources to common...
Reexamination Certificate
active
06991446
ABSTRACT:
The present invention involves a method and system for manufacturing a multiple density substrate for impact energy absorption with a mold having a mold cavity of a predetermined shape. The substrate is integrally formed by the method comprising providing a first set of unbonded pre-expanded beads having a first density and a second set of unbonded pre-expanded beads having a second density, loading a portion of the mold with the first set of unbonded beads at a predetermined location in the mold sufficiently to leave a void in the mold, and separately injecting the loaded mold portion with a sufficient second set of unbonded beads into the void. The method further includes bonding the first and second sets of beads together with heat to define a molded set of bonded beads having the predetermined shape and cooling the molded set of bonded beads sufficiently to define the substrate.
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Byma George B.
Cristea Brian A.
Mühlbacher Richard
Lear Corporation
Luk Emmanuel S.
Smith Duane
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