Patent · US Expired

Blow mandrel for extrusion blow molding with agressive blow media

US4767310A · kind A · utility

6Cited by

6References

4Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Horst Neumann · Ludwigshafen, DE
Manfred Busch · Dachau, DE

Key dates

Filing date	Mar 25, 1987
Grant date	Aug 30, 1988
Priority date	—
Expiry date	Mar 25, 2007

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29K2023/065
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

Escape of the blow medium at the blow mandrel/HDPE contact surface is prevented during extrusion blow molding of HDPE with an aggressive blow medium if a blow mandrel with a movable sealing element is used.

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