MACHINE AND METHOD FOR THE PRODUCTION OF KNITTED GOODS

• US 20170283992A1
• Filed: 11/11/2015
• Published: 10/05/2017
• Est. Priority Date: 12/11/2014
• Status: Active Grant

• Current Assignee: SIPRA Patententwicklungs- und Beteiligungsgesellschaft mbH
• Original Assignee: Sipra Patententwicklungs- und BeteiligungsGmbH
• Inventors: Bauer, Wolfgang, Boss, Bernd, Dziadosz, Thomas, Flad, Axel, Beck, Sabine, Maier, Christine, Schwab, Manuel, Vennemann, Josef
• Granted Patent: US 10,443,157 B2
• Time in Patent Office: Days
• CPC Class Codes: D01H 1/14 Details drafting arrangements D01H5/00; twisting arrangements D01H7/00
• CPC Class Codes: D01H 5/74 Rollers or roller bearings
• CPC Class Codes: D04B 1/12 characterised by thread material
• CPC Class Codes: D04B 35/22 Devices for preparatory treatment of threads
• CPC Class Codes: D04B 9/14 with provision for incorporating loose fibres, e.g. in high-pile fabrics

Abstract

A machine for the production of knitted goods includes a plurality of stitch-forming elements, at least one stitch-forming location, an associated spinning device at the at least one stitch-forming location, at which a sliver (FB) or a yarn is produced from a roving yarn (VG) and the sliver (FB) or yarn is fed to the stitch-forming elements. The spinning device has separate drive devices, which can be actuated in a manner that enables the spinning device to produce a sliver (FB) or a yarn of variable thickness from roving yarn (VG) and which can be fed to the stitch-forming elements.

Claims

1. A machine for the production of knitted goods, comprising:

with a plurality of stitch-forming elements;

at least one stitch-forming location; and

an associated spinning device positioned at a stitch-forming location;

wherein the associated spinning device processes a roving yarn (VG) to produce a sliver (FB) or a yarn and feeds the sliver (FB) or the yarn to the stitch-forming elements;

wherein each said associated spinning device has drive devices that are actuated in said associated spinning device to produce the sliver (FB) or the yarn with a variable thickness from the roving yarn (VG); and

wherein the sliver (FB) or the yarn that is produced with the variable thickness is fed to the stitch-forming elements.

2. The machine according to claim 1, wherein two spinning devices are provided at two respective stitch-forming locations, wherein the variable thickness of the sliver (FB) or the yarn produced by the respective two spinning devices can be different.

3. The machine according to claim 1, wherein the drive devices are actuated such that the variable thickness of the sliver (FB) or the yarn varies between the stitch-forming elements supplied by a same spinning device.

4. The machine according to claim 1, wherein the drive devices are actuated such that the variable thickness of the sliver (FB) or the yarn produced is different in all the stitch-forming elements supplied by a same spinning device.

5. The machine according to claim 1, wherein the at least one spinning device includes drafting devices with multiple roller pairs, wherein at least two of the roller pairs have an associated drive device and wherein each associated drive of the at least two roller pairs are actuated independently of one another.

6. The machine according to claim 5, wherein the spinning devices are provided with multiple drafting devices arranged next to one another.

7. The machine according to claim 1, wherein the spinning device includes friction spinning devices with at least one feed roller, the speed of which is adjustable in relation to a roller pair.

8. The machine according to claim 1, wherein transport devices for the sliver (FB) or the yarn produced are provided between the spinning devices and the stitch-forming elements.

9. The machine according to claim 8, wherein the the transport devices comprise at least one of transport rollers, transport tubes and a twist element.

10. The machine according to claim 1, configured as any of a circular knitting machine, a flat knitting machine, a hosiery machine or a raschel machine.

11. The machine according to claim 1, configured as a circular knitting machine and further comprising a rotary drivable needle cylinder, a plurality of stitch-forming locations and an associated spinning device at each of the plurality of stitch-forming locations.

12. The machine according to claim 11, wherein a rotational speed of the needle cylinder is adjustable.

17. The method according to claim 1, wherein the speed (V) of the spinning device is adjusted to a new speed (V) that is maintained at least until the spinning device has generated sufficient sliver (FB) or yarn length to form a stitch in a new thickness by the respective stitch-forming element.

18. The method according to claim 17, wherein after an amount of the sliver (FB) or yarn length sufficient for a stitch has been generated, the speed (V) of the spinning device can be adjusted to a new speed (V).

13. (canceled)

24. A method for producing knitted goods with a pattern formed in reliance upon stitches formed with different sliver (FB) or yarn thickness, using a knitting machine comprising a plurality of stitch-forming elements, at least one stitch-forming location and an associated spinning device at the at least one stitch-forming location, wherein the associated spinning device is configured with drive devices, and wherein the method comprises the steps of:

producing the sliver (FB) or the yarn from a roving yarn (VG), using the associated spinning device;

feeding the sliver (FB) or the yarn to the stitch-forming elements to form stitches with the different sliver (FB) or yarn thickness;

wherein the step of producing includes actuating the associated spinning device to control or adjust a speed (V) of the associated spinning device in accordance with a desired thickness of the sliver (FB) or yarn fed to each stitch-forming element, of the stitch-forming elements, depending on the pattern to be formed in the knitted goods.

14. The method according to claim 24 wherein the speed (V) of the spinning device in any time period to obtain the pattern.

15. The method according to claim 24, wherein the speed (V) of the spinning device is changed abruptly if the pattern is to have hard transitions between areas of different sliver (FB) or yarn thickness.

16. The method according to claim 24, wherein the speed (V) of the spinning device is adjusted in a ramp-like manner or asymptotically to a new speed (V), to define soft transitions between areas of different sliver (FB) or yarn thickness in the pattern.

19. The method according to claim 24, wherein a second roving yarn (VG) is fed to the spinning device.

20. The method according to claim 24, wherein the speed (V) of the spinning device is adjusted by varying a relative speed of roller pairs of the spinning device.

21. The method according to claim 20, wherein the spinning device is configured as a friction spinning device and wherein the speed (V) is varied by adjusting a relative speed between a feed roller and a withdrawal roller pair of the spinning device.

22. Knitted goods produced using the method according to claim 24, wherein the pattern is generated by forming stitches with the different sliver (FB) or yarn thickness, and varying a thickness of the sliver (FB) or yarn in stitch row direction, in needle wale direction or both.

23. The knitted goods according to claim 22, wherein the pattern has hard transition, soft transitions, or both between stitch areas formed with different sliver (FB) or yarn thickness.