Patent · US Expired

Extrusion head

US4619599A · kind A · utility

12Cited by

4References

6Claims

0Family size

Assignee

Hermann Berstorff Maschinenbau GmbH · DE

Inventors

Adolf Herbert · Hannover, DE
Klaus Bellmer · Ronnenberg, DE
Jobst Trocha · Hannover, DE

Key dates

Filing date	Jul 12, 1985
Grant date	Oct 28, 1986
Priority date	—
Expiry date	Jul 12, 2005

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29L2030/002
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

An extrusion head for producing, for example, tread strips for vehicle tires comprises a stationary central portion and two pivotable outer portions. Between each outer portion and the central portion, in the operative position of the head, insert members are interposed. Flow channels for the different materials used to make the tread strip and defined between the insert members and the central and outer portions of the head. The insert members are made displaceable by being detachably affixed to push-rods which are hydraulically, pneumatically or mechanically actuated. This provides for movement of the insert members, when the outer portions are pivoted away from the central portion, into a position which permits unhindered access to all sides of the insert members and permits the rapid cleaning and/or replacement thereof.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.