Patent · US Expired

Arrangement for conveying web material through a treating plant

US4069595A · kind A · utility

20Cited by

6References

18Claims

0Family size

Assignee

Aktiebolaget Svenska Flaktfabriken

Inventors

Enar Ahlbert · Växjö, SE
Karl-Hugo Andersson · Växjö, SE
Ingemar Karlsson · Växjö, SE
Bengt Oldaeus

Key dates

Filing date	Jan 22, 1976
Grant date	Jan 24, 1978
Priority date	—
Expiry date	Jan 22, 1996

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB65H2406/112
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A treatment plant for web material which, when bent, exhibits stiffness transverse to the direction of bending. The treatment plant comprises a series of blow boxes arranged in sections with the boxes in each section having parallel plane perforated surfaces on opposite sides of the web path. The perforations are graduated in degree with a high degree of perforation on one side of the web path being opposed by a low degree of perforation on the other side of the web path, and vice versa, so that the web assumes a wave shape between the first and second planes, the wave staying with its nodes in definite positions closer to the one plane opposite the highly perforated group in the second plane and closer to the second plane opposite the highly perforated group in the one plane.

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