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. 12, 1998
Filed:
May. 09, 1997
Edward L Brignola, Old Hickory, TN (US);
Alvin A Fleck, Madison, TN (US);
Price W LaCroix, Hendersonville, TN (US);
Edward K Willis, Mt. Juliet, TN (US);
Leon H Zimmerman, deceased, late of Nashville, TN (US);
Reemay Inc., Old Hickory, TN (US);
Abstract
An improved apparatus is provided for the formation of a spunbonded fibrous web suitable for service in nonwoven end uses. A melt-processable thermoplastic polymeric material is melt-extruded to form a multifilamentary spinline, is quenched, and is wrapped about at least two spaced driven draw rolls that are surrounded by a shroud prior to collection to form a web, and is bonded to form a spun-bonded nonwoven product. The draw rolls exert a pulling force on the multifilamentary spinline so as to accomplish drawing of the molten multifilamentary spinline prior to complete solidification. The shroud makes possible the self-stringing of the spinline around the draw rolls. A pneumatic jet located at the exit end of the shroud assists in the contact of the multifilamentary spinline with the draw rolls in order to facilitate the imposition of a uniform pulling force and expels the multifilamentary spinline in the direction of its length toward a support where it is collected. The formation of a highly uniform spun-bonded nonwoven is made possible on an expeditious basis.