Plastic article or earthenware shaping or treating: apparatus – Shaping surface including means to release or remove product... – By movable ejector means entering mold cavity
Reexamination Certificate
2006-02-23
2009-08-18
Gupta, Yogendra (Department: 1791)
Plastic article or earthenware shaping or treating: apparatus
Shaping surface including means to release or remove product...
By movable ejector means entering mold cavity
C425S4360RM, C425S812000, C425S81700C
Reexamination Certificate
active
07575427
ABSTRACT:
In a foam molding method useful in efficiently manufacturing a foam molding with high surface accuracy and a mold suitable therefor, a plurality of gas-blowing devices24including the following members are arranged in the bottom of a cavity23present in a lower die22:valve boxes25,gas channels26,valve elements27,gas flow-restricting valves28,and other members. The gas channels26of the gas-blowing devices24are supplied with gas from a common air pump. The valve elements27move vertically such that openings of the gas channels26that arranged in the cavity are opened or closed. When the gas is supplied to the gas channels26,the valve elements27are moved upward by the pressure of the gas so as to push a molding34.The valves28move upward together with the valve elements27and then sit on valve seat sections31disposed in the gas channels26to restrict the gas to flow into the gas channels26.The valves28have vent holes32;hence, the gas is allowed to flow into the gas channels26although the amount of the glowing gas is small.
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Chinese Office Action dated Jan. 4, 2008.
Japanese Office Action dated Nov. 25, 2008.
Bridgestone Corporation
Gupta Yogendra
Luk Emmanuel S
Sughrue & Mion, PLLC
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