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:
May. 13, 2003
Filed:
Jul. 20, 2000
Warren Arseneau, Burlington, CA;
Gord W. Johnston, Toronto, CA;
Rtica, Inc., Stoney Creek, CA;
Abstract
A melt blowing die for extruding filaments of a polymer by a suitable configured air supply system to provide critical influencing and control over the molecular orientation, crystallinity and crystal orientation in high speed fiber spin line applications. Control of the both the magnitude and location of the applied shearing force is provided, through the design characteristics of the air supply system and, in particular, the attenuation of the filament through an attenuation slot; in one form in conjunction with the introduction of the air flow to the filament in a parallel flow caused by a Coanda bend in a second form in conjunction with a properly designed internal channel.