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:
Oct. 10, 1989
Filed:
Jul. 13, 1988
Josep Strum, Duisburg, DE;
Wilfried Prange, Dinslaken, DE;
Thyssen Stahl Aktiengesellschaft, Duisburg, DE;
Abstract
The invention relates to an apparatus for the continuous butt welding of strips and sheets by laser beams. The sheets or strips 1,2 are moved together in abutment and retained in the same level by tension rollers 3,4 on both sides and right and left of the welding gap. On at least one side of the strips or sheets the tension roller 3 comprises a hollow shaft 9,10 and roller shells 13, 14 pivotably mounted thereon. Both the hollow shaft 9,10 and the roller shells 13, 14 are formed with an aperture 18a, 18b through which the laser beam 25 of a welding head 19 disposed inside the hollow shaft 9,10 extends. The welding head 19 is so aligned that the focused laser beams 25 impinges through the apertures 18a, 18b in the hollow shaft 9,10 and the roller shells 13,14 on to the welding gap in the clamped zone of the strips or sheets 1,2.