Patent · US Expired

Device for removing the gaseous laminar boundary layer of a web

US6285032A · kind A · utility

6Cited by

13References

6Claims

0Family size

Assignee

Eltex Elektrostatik GmbH · DE

Inventors

Ernst August Hahne · Allschwil, CH
Franz Knopf · Bühl, DE

Key dates

Filing date	Jan 13, 1998
Grant date	Sep 4, 2001
Priority date	—
Expiry date	Jan 13, 2018

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB65H2406/364
WIPO fieldHandling
WIPO sectorMechanical engineering

Abstract

A device for removing the gaseous laminar boundary layer from at least one of the two sides of a material web moved in transport direction preferably at high speed, for example said web being made of paper, characterized by at least one corona-charging electrode provided with at least one elongate tip, and connectable to a positive (+U) or negative high-voltage source, and characterized by at least one counterelectrode associated with the latter and connectable to a negative (-U) or positive high voltage or ground, with corona-charging electrode on the side of material web having the boundary layer to be removed, and the associated counterelectrode being located on the other side.

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