Patent · US Expired

Method and apparatus for treating wrapping material for cigarettes or the like

US4320773A · kind A · utility

4Cited by

8References

23Claims

0Family size

Assignee

Hauni-Werke Korber & Co. K.G. · DE

Inventors

Peter Pinck · Bargteheide, DE
Uwe Heitmann · Hamburg, DE
Anton Baier · Bargteheide, DE
Adolf Helms · Hamburg, DE

Key dates

Filing date	Aug 20, 1980
Grant date	Mar 23, 1982
Priority date	—
Expiry date	Aug 20, 2000

Classification

Technology area (CPC A)Human Necessities
CPC primaryA24C5/007
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A running web of wrapping material which is about to be converted into adhesive-coated uniting bands for joining plain cigarettes with filter plugs in filter tipping machines is transported through the passage of a housing wherein the web travels through a series of spark gaps between pairs of spaced-apart electrodes. The sparks which are caused to jump across the gaps perforate the web with attendant development of ozone and particles of dust. The passage of the housing forms part of an endless path for the circulation of Argon which reduces the rate of development of ozone, which is cooled to cool the electrodes, and which is caused to pass through a filter serving to intercept the particles of dust which are removed from the spark gaps. The making of holes in a noble-gas atmosphere prolongs the useful life of the electrodes.

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