Patent · US Expired

Apparatus for making bags from a continuously fed thermoplastic tubular web of film

US4114520A · kind A · utility

20Cited by

6References

5Claims

0Family size

Assignee

Windmöller & Hölscher KG · DE

Inventors

Fritz Achelpohl · Lengerich, DE
Friedhelm Brinkmeier · Lengerich, DE

Key dates

Filing date	Apr 7, 1977
Grant date	Sep 19, 1978
Priority date	—
Expiry date	Apr 7, 1997

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T156/1313
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

In an apparatus for making bags from a continuously fed flattened thermoplastic tubular or semi-tubular web of film, severing means for cutting the web into sections co-operate with a first welding cylinder for performing a welding operation on each section with the aid of welding tongs, the web sections being held to the welding cylinder by means of belts which partially envelop the cylinder, and a second welding cylinder is provided downstream of the first cylinder, the web sections being transferred to the second cylinder for the purpose of having a further welding operation performed on them.

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