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:
Feb. 23, 1999
Filed:
Sep. 10, 1993
Peter Greller, Enkenbach-Alsenborn, DE;
G.M. Pfaff Aktiengesellschaft, Kaiserslautern, DE;
Abstract
In a process and a device for carrying out a welding process on thermoplastic material webs, the value of the pressing force (F.sub.i) of a pair of pressure rollers is determined as a measured value representing the weld seam thickness and is used as the actual value of the controlled variable of a welding process regulating unit, and it is compared with a corresponding set value. The feed speed (V) of the welding device is used as the correcting variable of this regulating unit by increasing the speed in the case of decreasing weld seam thickness and decreasing the speed in the case of increasing weld seam thickness to compensate a possibly existing deviation.