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. 23, 1977
Filed:
Apr. 21, 1975
David W Appel, Neenah, WI (US);
Kimberly-Clark Corporation, Neenah, WI (US);
Abstract
An extrusion die for thermoplastic polymer is disclosed having a distributor which provides substantially constant residence time and pressure loss of polymer flowing through the die from the inlet to the extrusion aperture. Dies are disclosed for extrusion of sheet, film and discontinuous microfibers. The distributor has cross flow channels for conveying the polymer laterally and axially connected pressure loss and residence time control sections for independently compensating for the varying pressure loss and residence time characteristics of the polymer flow through the distribution channels. With a distributor so constructed, the overall height of the die remains substantially the same as the die width increases so that the distributor is particularly suitable for dies for wide extrusion lines.