Patent · US Expired

Process for producing hollow bodies of oriented thermoplastic material

US4894198A · kind A · utility

10Cited by

2References

11Claims

0Family size

Assignee

Krupp Corpoplast · DE

Inventors

Peter Albrecht · Hamburg, DE
Karl-Heinz Balkau · Oststeinbek, DE
Vinco Cujic · Hamburg, DE
Tilman Doring · Hamburg, DE
Claus Horwege · Hamburg, DE
Wolfgang Reymann · Hamburg, DE
Klaus Vogel · Gondelsheim, DE
Walter Wiedenfeld · Hamburg, DE

Key dates

Filing date	Dec 4, 1987
Grant date	Jan 16, 1990
Priority date	—
Expiry date	Dec 4, 2007

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29L2031/7132
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

In a process for producing hollow bodies of oriented thermoplastic material, a hollow blank having a bottom portion and a substantially cylindrical wall portion with an opening at its end remote from its bottom portion is subjected to pre-expansion in the region of the opening and then thermofixing in a subsequent treatment step. The thermofixing operation may be preceded by a mechanical expansion operation for orienting the plastic material forming the wall portion of the blank.

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