The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 2004
Filed:
Apr. 16, 2001
LTS Lohmann Therapie-Systeme AG, Andernach, DE;
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) ( ) is reduced so that there is a considerable reduction in the temperature reached within the pack material ( ), this temperature then being only slightly above the melting point of the polymer used. An example of a sealing tool ( ) is given (FIG. ).