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. 16, 1980
Filed:
Dec. 22, 1978
Willard E Rapp, Griggstown, NJ (US);
Western Electric Company, Inc., New York, NY (US);
Abstract
Screen devices for use with an automatic screen changer (10) of an extruder (11) are fabricated from a screen preform (32) including an elongated carrier strip (36) having a plurality of screen elements (33--33) connected thereto. The screen changer (10) includes a pair of recesses (21,22) for receiving screen devices and is movable between a first position in which one recess is in the path of the extrudate (11) while the other recess is outside the path thereof and a second position in which the dispositions of the recesses is reversed. While a recess (21 or 22) is outside of the path of the extrudate, a used, clogged screen device is ejected therefrom and a new screen device is fabricated, in situ, therein. The screen device is fabricated by feeding the preform (32) between a punch (54) and the recess. The punch (54) is then actuated to sever an element (33) from the preform (32) and in the same motion insert it into the recess.