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:
Apr. 26, 2005
Filed:
May. 07, 2001
Rolf Lasson, Lund, SE;
Nils Toft, Malmö, SE;
Rolf Lasson, Lund, SE;
Nils Toft, Malmö, SE;
Tetra Laval Holdings & Finance S.A., Pully, CH;
Abstract
A method of producing a packaging laminate () in which a web is provided with through-going holes () which are covered on one side with a first outer layer () on the one side of the web and with a second outer layer () on the other side of the web in such a manner that the first and second outer layers (and) are permanently sealed to one another within the regions of the opening contour of the through-going holes. In order to ensure the permanent seal between the two outer layers (and), the web is subjected, after application of the first outer layer but prior to application of the second outer layer, to so-called flame-treating whereby accessible parts of the first outer layer within the regions of the through-going holes () are activated or polarized by means of one or more gas flames directed at the other side of the web.