Patent · US Active

Dwell time control method and system with automatic pressure switch point adjustment

US8561428B2 · kind B2 · utility

1Cited by

11References

20Claims

0Family size

Assignee

Emhart Glass S.A. · CH

Inventors

Andreas Helfenstein · Bellinzona, CH
Hartmut Geisel · Bad Eilsen, DE
Christian Fröba · Bergneustadt, DE

Key dates

Filing date	Sep 14, 2011
Grant date	Oct 22, 2013
Priority date	—
Expiry date	Oct 7, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC03B9/41
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A dwell time control system and method for automatically adjusting the selection and timing of a sequence of pressures used to drive the plunger in a parison mold during the parison forming process. The timing of characteristics of the observed press curve from one or more previous parison forming cycles are ascertained and used to control the timing of the changes in pressure during a subsequent parison forming cycle. The timings of these changes of pressure are determined as predetermined percentages of the timings of the characteristics in order to prevent the blow mold from being forced open and in order to prevent the occurrence of an overpressed finish.

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