Patent · US Expired

Process for dry spinning yarns of improved uniformity and reduced adhesion

US4804511A · kind A · utility

13Cited by

13References

6Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Christian Pieper · Neuss, DE
Hans K. Burghartz · Neuss, DE
Rolf-Burkhard Hirsch · Dormagen, DE
Norbert Rink · Dormagen, DE

Key dates

Filing date	Dec 2, 1987
Grant date	Feb 14, 1989
Priority date	—
Expiry date	Dec 2, 2007

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD01D5/092
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Extraordinarily low ranges of error, with respect to yarn adhesion and uniformity, in dry spinning yarns are achieved when the spinning gas in the upper part of the shaft blasts the yarns radially from the inside to the outside in an apparatus designed for this purpose, the velocity of the radial flow of gas, dirctly below the spinning nozzle, transverse to the running direction of the yarns and within a spacing of 10 mm from the nozzle, increasing from 0 to at least from 0.2 to 1 m/s.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.