Patents Assigned to Imesco, Inc.
  • Patent number: 5662856
    Abstract: Hollow plastic articles are produced by a method wherein molten material is first conveyed at low pressure via a telescoping nozzle, across compensating rods in the melt passages and individually circumferential flow passages of common primary distribution spools into transfer reservoirs. Upon completion of the controlled filling phase, primary and secondary distribution spools are shifted, the mold manifold assembly with the transfer housing together with the mold cavity bottoms and outside wall-forming sleeves are drawn in unison against stationary displacement plugs which transfer the molten material from the transfer reservoirs around the fixed-position core pin tips and into corresponding mold cavities. After completion of the cavity filling phase, the common secondary distribution spools, located close to the mold cavity bottom gates, are shifted laterally such that their land areas shut off the external melt streams.
    Type: Grant
    Filed: July 12, 1995
    Date of Patent: September 2, 1997
    Assignee: Imesco, Inc.
    Inventor: Ernst Dieter Wunderlich