Patent · US Expired

Apparatus for the sealing of the interior of synthetic-resin tubes during extrusion

US4084933A · kind A · utility

3Cited by

5References

6Claims

0Family size

Assignee

REIFENHAEUSER GMBH & CO. KG

Inventors

Paul Reitemeyer · Troisdorf, DE
Hans Reifenhauser · Troisdorf, DE

Key dates

Filing date	Dec 3, 1976
Grant date	Apr 18, 1978
Priority date	—
Expiry date	Dec 3, 1996

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29C48/10
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The synthetic-resin tube emerging from an extrusion die is internally sealed by a pair of sealing members having inflatable peripheries and connected to flexible members running back through the die so that one of the seals can be drawn toward the die while the other is entrained with the tube away from the latter and vice versa.

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