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. 02, 1985
Filed:
Mar. 09, 1982
Ernst Rohringer, Hilgert, DE;
Steuler-Industriewerke GmbH, Grenzhausen, DE;
Abstract
A method of producing large area lining panels (1) composed of thermoplastic material which are used as pouring forms and linings for concrete vessels. On the face of the lining panels (1) that contacts the concrete there are arranged in rows a plurality of affixing knobs (2) also made of thermoplastic material which have a circular or polygonal cross-section with conically inclined surface portions. A plurality of the affixing knobs (2) are simultaneously placed on the lining panel (1) and joined to it by ultrasonic, vibratory or rotational welding. The placing and welding of the affixing knobs (2) singly or simultaneously in groups at a predetermined distance from each other is effected in a continuous succession.