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:
Mar. 30, 2010
Filed:
Sep. 11, 2007
Lukas Gisler, Alpnach Dorf, CH;
Adolf Niederberger, Kägiswil, CH;
Lukas Gisler, Alpnach Dorf, CH;
Adolf Niederberger, Kägiswil, CH;
Leister Process Technologies, Kägiswil, CH;
Abstract
A welding machine for joining overlapping webs of sealing material, with a powered chassis supported by rolls, with a heating system for local heating of the webs of sealing material that is mounted laterally to the chassis () and can be placed between the webs of sealing material in edge regions, with at least a first pressure roll installed on the chassis for pressing together the webs of sealing material to be joined by means of heat, where a second pressure roll serving as a replacement pressure roll is placed in the chassis, whose weight rests on the drive shaft and which can be exchanged without tools for the first pressure roll that is coupled to the drive shaft of the welding machine and presses together the bitumen webs to be joined. In addition, the pressure roll () may have at least one contact surface made of hard metallic material; and a stripper element is provided whose free end contacts the contact surface or is in close proximity to the same. Therefore, even with materials to be welded that will contaminate the pressure roll, the welding machine is capable of operating for long periods.