Patent · US Expired

Process and apparatus for forming a tube from a flat web

US4478670A · kind A · utility

31Cited by

7References

18Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Klaus Heyse · Bad Soden, DE
Klaus Andrae · Zornheim, DE

Key dates

Filing date	Nov 12, 1982
Grant date	Oct 23, 1984
Priority date	—
Expiry date	Nov 12, 2002

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T156/1013
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Disclosed is a process and apparatus for forming a tube from a flat web by overlapping the edge zones of the web with one another or with a flexible strip while maintaining distance between the adhering, overlapping surfaces in order to provide horizontally straight edges, and thus a circumferentially constant diameter.

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