Patents Assigned to ER-WE-PA Machinenfabrik GmbH
  • Multilayer coextrusion apparatus
    Patent number: 5223276
    Abstract: A coextrusion apparatus for producing a multilayer film or sheet of diverse thermoplastic materials has a slit die and a feedblock assembly integrated into the die. The assembly includes a removable feedblock received within a cavity of the die and has a plurality of slotted, layer distribution passages opening into a coathanger-type expansion chamber via a shallow entrance section. The passages are mutually spaced apart and lie parallel to the slotted outlet of the die.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: June 29, 1993
    Assignee: ER-WE-PA Machinenfabrik GmbH
    Inventors: Dragan Djordjevic, Dieter Jung