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:
Dec. 17, 2002
Filed:
Mar. 31, 1998
Vincenzo Benatti, Cinisello B., IT;
Pirelli Coordinamento Pneumatici, Milan, IT;
Abstract
A tread band for vehicle tires is manufactured by conveying a primary elastomer material ( ) through an extrusion path ( ) defined by a preforming channel ( ) followed by an extrusion outlet ( ) formed in a die ( ). The preforming channel ( ) is defined in a preforming device ( ) comprising a drawer ( ) operatively engaging a preformer ( ). Formed in the drawer ( ) is an auxiliary channel ( ) the end length ( ) of which opens at right angles into the extrusion path ( ), close to the extrusion outlet ( ). An auxiliary elastomer material ( ) conveyed to the auxiliary feeding channel ( ) is homogeneously distributed by a coating effect under the lower surface of the tread band ( ) crossing the extrusion outlet ( ).