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:
Nov. 17, 1998
Filed:
Nov. 03, 1995
Roehm GmbH Chemische Fabrik, Darmstadt, DE;
Abstract
The invention relates to a method for the production of flat laminates (5) from polymethacrylate plastic, by thermal adhesion of at least two parts (1) of polymethacrylate plastic heated at their surface, with the characterizing features that the parts (1) of polymethacrylate plastic, which have been preheated to surface temperatures of 130.degree. to 200.degree. C. on the adhesion side (1a), and which maintain their original shape during the preheating phase, are pressed together between a pair of rollers (2, 3), of which at least one roller (2), by means of which the pressure force (4) is exerted, is mounted in movable manner, at a feed velocity being between 5 and 200 mm/s and a pressure force acting on the roller (3) between 10 and 500 N. Preferably, during the adhesion of the laminates (5), flat or oblong objects (8) with thicknesses which are allowed to amount to a maximum of 50% of the thickness of the parts (1) of polymethacrylate plastic, are embedded between the parts (1) of polymethacrylate plastic which are to be adhered together.