Patent · US Expired

Method of and apparatus for making rod-shaped articles of the tobacco processing industry

US4924884A · kind A · utility

2Cited by

1References

19Claims

0Family size

Assignee

Korber AG · DE

Inventors

Nikolaus Hausler · Oststeinbek, DE
Heidi Muller · Oststeinbek, DE
Peter Pinck · Bargteheide, DE
Christina Straube · Hamburg, DE

Key dates

Filing date	Feb 6, 1989
Grant date	May 15, 1990
Priority date	—
Expiry date	Feb 6, 2009

Classification

Technology area (CPC A)Human Necessities
CPC primaryA24D3/0295
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

A continuous filter tow is advanced through a combined wrapping and condensing station by an endless belt, and the thickness of the belt decreases as a result of wear. The resistance which the condensed tow offers to the flow of air is measured by a pneumatic detector at the aforementioned station, and the accuracy of such measurement is affected by decreasing thickness of the belt as a result of increasing rate of escape of testing fluid along the belt. Therefore, the thickness of the belt is monitored and signals which are generated to denote the thickness of the belt are used to correct signals which are generated to denote the resistance to the flow of air. The correction involves modifying the signals denoting the resistance to the flow of air to denote a more pronounced resistance proportionally with decreasing thickness of the belt.

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