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Class Information
Number: 425/563
Name: Plastic article or earthenware shaping or treating: apparatus > Female mold and charger to supply fluent stock under pressure thereto in fluid-tight relationship (e.g., injection mold, etc.) > With means between charger and mold to cut off flow of fluent stock (e.g., needle valve, baffle, etc.) > Biased, pressure responsive means
Description: Apparatus wherein the flow stopping means is resiliently urged out of stopping condition and wherein pressure of the fluent stock acts on a portion thereof to bring about the stopping condition thereof.

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8348661 Check valve for an injection molding machine Jan. 8, 2013
8293162 Method and apparatus for producing molded product Oct. 23, 2012
8087925 Device for forming headrest Jan. 3, 2012
7963762 Injection molding apparatus having a valve pin coupling Jun. 21, 2011
7964825 Method for the attachment of an electrical lead wire on a surface element, as well as a heating element, especially for a plastic-spraying device Jun. 21, 2011
7934923 Screw, injection apparatus, and pressure member May. 3, 2011
7909600 Gate of die and mold, die and mold for injection molding, and method of manufacturing the same Mar. 22, 2011
7824175 Injection molding anti-drool nozzle Nov. 2, 2010
7771184 Press with plate-like frame parts, and method for operating such a plate press Aug. 10, 2010
7754134 Injection molding process Jul. 13, 2010
7678320 Anti-drool mechanism for a sprue bushing Mar. 16, 2010
7566216 Mold assembly using inserts Jul. 28, 2009
7404713 Inlet nozzle for hot runner system Jul. 29, 2008
7396227 Hot runner sprue Jul. 8, 2008
7377769 Discharge apparatus for two-stage injection molding machine May. 27, 2008
7329118 Nozzle and apparatus for injection molding Feb. 12, 2008
7326048 Valve nozzle Feb. 5, 2008
7322817 Injection molding nozzle for plastic with at least two outlet openings Jan. 29, 2008
RE39935 Multi-cavity injection molding apparatus splitting melt near nozzle front Dec. 4, 2007
7296993 Poppet valve assembly Nov. 20, 2007
7287549 Valve pin cross over nozzle for stack mould Oct. 30, 2007
7270536 Screw tip and molding system apparatus Sep. 18, 2007
7252500 Check valve assembly for injection molding apparatus Aug. 7, 2007
7244118 Hot runner nozzle and manifold seal Jul. 17, 2007
7241132 Backflow prevention device for in-line screw injection molding machine Jul. 10, 2007
7234929 Injection molding flow control apparatus and method Jun. 26, 2007
7210922 Valve pin operating mechanism May. 1, 2007
7189071 Telescopic manifold nozzle seal Mar. 13, 2007
7172333 Injection molding screw Feb. 6, 2007
7125242 Decompression device for an injection molding apparatus Oct. 24, 2006
7125246 Hot runner for molding small plastic articles Oct. 24, 2006
7033163 Backflow prevention device Apr. 25, 2006
6857867 Backflow prevention device Feb. 22, 2005
6840757 Injection nozzle for mixing heads of reaction casting machines Jan. 11, 2005
6811393 Valve pin cross over nozzle Nov. 2, 2004
6793480 Shutoff valve assembly Sep. 21, 2004
6676401 In-mold gate opening and closing mechanism and metal mold for injection molding Jan. 13, 2004
6655945 Apparatus and method for multi-layer injection molding Dec. 2, 2003
6648622 Apparatus and method for multi-layer injection molding Nov. 18, 2003
6585001 Flow through ring valve for plastic extruding systems Jul. 1, 2003
6558148 Gas valve pin mechanism May. 6, 2003
6554603 Plastifying unit in injection-moulding machines with a nonreturn valve Apr. 29, 2003
6499987 Positive control non-return valve for an injection molding machine Dec. 31, 2002
6464488 Sliding ring non-return valve Oct. 15, 2002
6435201 Non-return valve Aug. 20, 2002
6227841 Valve and pinned screw point assembly May. 8, 2001
6203311 Sliding ring non-return valve Mar. 20, 2001
6179604 Valve gate device for use in an injection mold Jan. 30, 2001
6155816 Return flow shut-off device for an injection unit in an injection moulding machine Dec. 5, 2000
6113380 Back flow-prevention apparatus Sep. 5, 2000

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