Patent · US Expired

Suction control in a suction/blowing mold system

US6884374B2 · kind B2 · utility

0Cited by

4References

9Claims

0Family size

Assignee

Fischer-W. Muller Blasformtechnik GmbH · DE

Inventors

Rudolf Küpper · Neunkirchen, DE
Heinz-Hugo Willach · Lohmar, DE
Hubert Muller · Grevenbroich, DE

Key dates

Filing date	Dec 13, 2000
Grant date	Apr 26, 2005
Priority date	—
Expiry date	Dec 25, 2022

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29C2049/78805
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A plastic hollow preform is drawn through a mold passage formed in a closed mold by applying a generally constant suction to a downstream end of a conduit having an upstream end connected to an output end of the mold passage. A flow cross section of the conduit is varied between its upstream and downstream ends so as to vary a rate at which the preform is drawn through the passage by the suction. The flow cross section is varied by displacing a valve element in the conduit between positions in which it differently blocks flow through the conduit.

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