Patent · US Expired

Method for making a preform consisting of at least three layers of thermoplastic material

US4719069A · kind A · utility

13Cited by

4References

6Claims

0Family size

Assignee

Krupp Corpoplast Maschinenbau GmbH · DE

Inventors

Wolfgang Reymann · Hamburg, DE
Gunter Kleimenhagen · Hamburg, DE

Key dates

Filing date	May 13, 1986
Grant date	Jan 12, 1988
Priority date	—
Expiry date	May 13, 2006

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29L2009/00
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A method and an apparatus for making blow-moulded bottle from a preform consisting of at least three layers. For making the preform a tube section heated at one end is shaped by pushing into a closed bottom mould to form a bottom and pressure is exerted in the axial direction on the center bottom region to close the still present gaps in an outer layer as soon as an inner layer has flowed together.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.