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:
Mar. 08, 1988
Filed:
Feb. 28, 1985
Applicant:
Inventors:
Assignee:
Oy Wiik & Hoglund AB, Vaasa, FI;
Primary Examiner:
Int. Cl.
CPC ...
B65H / ; B29C / ; B29C / ; B29C / ;
U.S. Cl.
CPC ...
156172 ; 156187 ; 264 459 ; 264129 ; 264171 ; 2642091 ; 2642093 ; 264211 ; 264284 ;
Abstract
The invention provides a method of forming composite products of two incompatible plastics or other materials by extruding a first stream of plastic through a die to form a profile and coextruding another stream on the surface thereof which is fusible with the first plastic and is impregnated with foreign matter and causing, by means of high heat, pressure drop or shear stress, a rupture of the layer to form a pattern of irregular cavities and projections to which a coating can be applied which will invade the cavities and surround the projections to bond with the extruded profile.