Precision wound yarn package as well as a process and device for making the same
OwnerFritjof Maaginventor
Life of this patent
Estimating the term…
Abstract
A package comprising a tube onto which a yarn, wire, tape of the like is wound by a precision winding characterized in that during the winding of the package the ratio formed from the speed of rotation of the package and the traverse speed of the yarn remains constant, in order to provide optimum characteristics with respect to the course of the package such as the mass distribution of the yarn of the package and with respect to yarn winding. A process for winding the yarn on the package with a constant circumferential speed and a device for performing the precision winding process is disclosed.
Claims26
A precision package comprising:
- a tube having a central axis;
- a winding of a winding material on said tube, said winding including a plurality of ribbon patterns spaced radially from each other, each of said ribbon patterns having a plurality of reverting loops along a circumferential edge of an axial end surface of said package, said circumferential edge being divided into a number of segments, the variation in the number of said reverting loops in each of said segments between two successive ribbon patterns being less than 8.
A process for winding a winding material onto a tube to form a precision package, comprising:
- rotating said tube to provide a constant circumferential winding speed to said package,
- reciprocating a winding material guiding head axially along said package, said winding material guiding head guiding said winding material axially along said package and forming reverting loops of winding material along segments of a circumferential edge of each axial end of said package, the rotating of said tube and the axial guiding of said winding material operating to form a plurality of ribbon patterns spaced radially from each other on said tube, and adjusting the ratio of the rotational speed of said tube with respect to the number of reciprocations made by said winding material guiding head to provide a variation in the number of reverting loops formed in each of said segments between two successive ribbon patterns of less than 8.
A device for winding a winding material on a tube to form a precision package, said device comprising:
- tube drive means to drive said tube at a constant circumferential speed,
- a winding material guiding head mounted for axial reciprocation along said tube;
- rotary drive means to provide a rotary drive force to said winding material guiding head;
- drive conversion means to convert said rotary drive force of said rotary drive means into a reciprocating drive force, said reciprocating drive force driving said winding material guiding head,
- package drive means to drive the package formed on said tube, said drive being imparted to a circumference of said package,
- control means to control said rotary drive means, said control means including first sensing means to sense the rotational speed of said rotary drive means and second sensing means to sense the rotary speed of said package, the ratio of the rotational speed of said rotary drive means and the rotational speed of said package being designated a transmission ratio,
- transmission ratio value storage means to store values of desired transmission ratios, between the rotational speeds of said rotary drive means and said package, and
- computer means connected with said second sensing means and said transmission ratio value storage means to provide a desired transmission ratio to said control means in response to a given package rotational speed, said control means adjusting said rotary drive means to conform with said transmission ratio.
Dependencies are inferred from the claim text.