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:
Jun. 16, 1992
Filed:
Nov. 05, 1991
Wilfried Baumgarten, Pattensen, DE;
Paul Troester Maschinenfabrik, Hanover, DE;
Abstract
An extruder has a screw rotatable in a housing and an extrusion head having an upper part bolted to the housing and a lower part hingedly connected to the housing for movement between a closed operative position and an open position. The upper part of the extrusion head is located above the screw so that the screw can be removed from the housing when the lower extrusion head part is swung to open position and without removing the upper extrusion head part from the housing. The two extrusion head parts define between them a flow passage directed toward the upper roller of a calender. A movable lip on the lower extrusion head part faces, and is spaced from, the upper calender roller to define a variable gap through which extruded material must pass before reaching the narrowest part of the gap between the calender rollers. The lip is either pivoted at an upper edge or is slidable toward and away from the upper calender roller to vary the width of the gap formed between the lip and the upper calender roller.