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. 14, 1997
Filed:
May. 15, 1996
Andreas Christel, Schaffhausen, CH;
Abstract
The invention describes a device and a process for producing extrusion-coated laminates. The extrusion device contains an extruder nozzle with nozzle lip, a cooling roller and a contact roller, wherein the cooling roller and the contact roller form a roller gap and the extruder nozzle is directed towards the roller gap. A melt of thermoplastic plastics, which enters the roller gap while forming a coating film and is joined to a substrate film in the roller gap, emerges from the nozzle lip. A device for improving the adhesion of the coating film to the substrate is thus disposed in the region between the extruder nozzle and the roller gap at a slight distance from the film. The device is a corona treatment station which has a discharge electrode at high voltage and an electrically earthed counter-electrode on only one side of the coating film.