Patent · US Active

Method for energy-efficient sealing of tubular bags

US8349107B2 · kind B2 · utility

0Cited by

2References

13Claims

0Family size

Assignee

ROVEMA GMBH · DE

Inventors

Sepp Lachenmaier · Bruchsal, DE
Harald Braun · Eßlingen, DE
Erhard Lutz · Mücke, DE

Key dates

Filing date	Nov 1, 2011
Grant date	Jan 8, 2013
Priority date	—
Expiry date	Nov 1, 2031

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29L2031/7128
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The embodiments of the invention relate to a method for creating a force for a welding jaw of a vertical tubular bag machine. The welding jaw is moved back and forth along a path to strike a second welding jaw moving in the opposite direction. A tubular film is compressed between the second jaw and at least one sealing surface of the welding jaws, to weld the tubular film by ultrasonic vibrations applied thereto via the sealing surface at an applied pressure under a sealing force (Fs) within a sealing time (ts). The sealing force (Fs) is predetermined by a control unit such that the sealing force (Fs) runs along a sealing force curve within the sealing time (ts). The sealing force curve has a first relative sealing force maximum (Fs1) and at least one second relative sealing force maximum (Fs2), wherein (Fs1) is lower than (Fs2).

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