Patent · US Active

Bag and method for producing the same

US10118736B2 · kind B2 · utility

4Cited by

7References

16Claims

0Family size

Assignee

Windmöller & Hölscher KG · DE

Inventors

Rüdiger Grosse-Heitmeyer · Westerkappeln, DE
Thomas Knoke · Bielefeld, DE
Martin Koelker · Ibbenbüren, DE
Ludger Schulten · Hopsten, DE
Hans-Ludwig Voss · Tecklenburg, DE
Jan Weber · Maple Grove, US
Thomas Hawighorst · Hasbergen, DE
Holger Frische · Hasbergen, DE

Key dates

Filing date	Jan 2, 2007
Grant date	Nov 6, 2018
Priority date	—
Expiry date	Sep 20, 2028

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB31B2160/10
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A sack is formed by first transverse sealing seams from a foil tube, and is provided with at least a first vent channel, which runs largely parallel to the axis of the film tube, and whose inner film layer has first vent openings for venting of the sack interior into the first vent channel. A second vent channel is provided, which is connected to the first vent channel by second vent openings, and which, in turn, has third vent openings, which vent the at least one second vent channel.

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