Patents Assigned to Krupp Corpoplast Maschinebaur GmbH
  • Method of making a blow-moulded container from a thermoplastic polyester, in particular pet
    Patent number: 4933135
    Abstract: To improve the properties of biaxially orientated blow-moulded containers of PET the mouth region of the container serving for fitting a closure member is heat-set, i.e. crystallized at elevated temperature. The heat-setting is effected at the mouth end of a parison or preform and the previously heat-set mouth end is then reshaped to the finished mouth portion. This improves the dimensional stability of the mouth region.
    Type: Grant
    Filed: November 21, 1988
    Date of Patent: June 12, 1990
    Assignee: Krupp Corpoplast Maschinebaur GmbH
    Inventors: Claus Horwege, Wolfgang Reymann