Patent · US Expired

Method for producing heat bonded packages and tool for implementing said method

US6797105B1 · kind B1 · utility

12Cited by

7References

5Claims

0Family size

Assignee

LTS Lohmann Therapie-Systeme AG · DE

Inventors

Klaus Schumann · Weil am Rhein, DE
Frank Seibertz · Rheinbrohl, DE
Peter Steinborn · Neuwied, DE

Key dates

Filing date	Apr 16, 2001
Grant date	Sep 28, 2004
Priority date	—
Expiry date	Apr 16, 2021

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29C66/71
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The invention relates to a process for producing hot-seal packs, in particular for transdermal therapeutic systems, by welding to one another, at predetermined linear regions and at polymer layers facing towards one another, two laps of continuous pack material composed of two or more layers. To this end, one (or two) sealing tool(s) are used to bring the pack material into contact with pressure and heat. To improve the quality of the welded seams without altering the cycle rate, according to the invention the sealing time is doubled and the temperature of the sealing tool(s) (1, 2) is reduced so that there is a considerable reduction in the temperature reached within the pack material (3, 4), this temperature then being only slightly above the melting point of the polymer used. An example of a sealing tool (1, 2) is given (FIG. 1).

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