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. 29, 1999
Filed:
Oct. 24, 1997
Jerry Fuller Potter, Seaford, DE (US);
Melvin Harry Johnson, Chadds Ford, PA (US);
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
A baffle structure that includes a generally cylindrical portion and at least one generally linear portion is associated with each roll in a yarn processing. The generally cylindrical portion is spaced a predetermined clearance distance from the surface of the roll with which it is associated to define a generally curved channel about the roll. The generally linear portion of each baffle structure extends toward the other roll, with the generally linear portions overlapping each other to define a substantially linear channel between adjacent upstream and the downstream rolls. The generally linear portion extending from the cylindrical portion of the upstream roll toward the downstream roll has an edge thereon. The edge is disposed within a predetermined close distance of the surface of the upstream roll such that the edge lies within the boundary layer of air able to be generated about the upstream roll. The generally curved channels and the substantially linear channel cooperating to define a pathway that substantially encloses the warp array of yarns as the same is moved over and between the rolls. In operation, a substantially uniform transverse temperature is maintained across the pathway at each point therealong, and at least a portion of the heated air about the upstream roll is stripped therefrom as yarn is conveyed from the upstream to the downstream roll.