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:
Aug. 10, 1993
Filed:
Jan. 24, 1992
Bridgestone Corporation, Tokyo, JP;
Abstract
A method of manufacturing a rubber sheet with rugged patterns formed on one side surface portion includes the step of preparing an apparatus including a rotating roll having rugged patterns, a member having an arcuate inner surface radially spaced apart from an outer peripheral surface of the rotating roll, and a die. The arcuate inner surface is recessed away from the rotating roll and defines an arcuate compartment chamber together with the outer peripheral surface of the rotating roll. The arcuate compartment chamber, has an inlet port and an outlet port. The die is placed in such a manner to adjoin to the outlet port portion of the compartment chamber, the die having an inner edge portion which is radially spaced apart from the outer peripheral surface of the rotating roll and defines an extrusive clearance together with the outer peripheral surface. The method further includes the steps of feeding a feed rubber into the arcuate compartment chamber through the inlet port thereof, kneading the feed rubber in the compartment chamber and moving the feed rubber from the inlet port toward the outlet port, and extruding the rubber sheet made of the feed rubber from the compartment chamber through the extrusive clearance.