Knitted shoe components and methods of making the same

• US 9,920,461 B2
• Filed: 03/04/2015
• Issued: 03/20/2018
• Est. Priority Date: 03/04/2014
• Status: Active Grant

• Current Assignee: Ecofibre Limited
• Original Assignee: Knitmasters, LLC
• Inventors: Aristizabal, Juan, Bruner, Jeffrey W.
• Primary Examiner(s): Worrell, Danny
• Application Number:
  US15/119,411
• Publication Number:
  US 20170049187A1
• Time in Patent Office: 1,112 Days
• CPC Class Codes: D04B 1/106 at a selvedge, e.g. hems or turned welts
• CPC Class Codes: D04B 1/108 Gussets, e.g. pouches or heel or toe portions
• CPC Class Codes: D04B 1/24 wearing apparel
• CPC Class Codes: D04B 7/30 specially adapted for knitting goods of particular configuration
• CPC Class Codes: D10B 2403/0332 with gussets folding into three dimensional shape, e.g. seat covers
• CPC Class Codes: D10B 2501/043 Footwear

Abstract

In one aspect, methods of making a knitted shoe component are described herein. In some embodiments, a method comprises knitting one or more fibers to form a toe portion; knitting one or more fibers to form a first wing portion; and knitting one or more fibers to form a second wing portion. The first and second wing portions extend from the toe portion and are knittingly connected to the toe portion. The method further comprises reducing the lateral separation between the first and second wing portions from an initial separation distance to a knitting separation distance such that the wing portions can be knitted together to form a seamless heel portion of the shoe component, including using a series of stitch transfer, racking, and knitting steps.

Claims

1. A method of making a knitted shoe component using a knitting machine having a front needle bed and a back needle bed, the method comprising:

(a) knitting one or more fibers to form a toe portion;

(b) knitting one or more fibers to form a first wing portion extending from the toe portion and knittingly connected to the toe portion, the first wing portion having a first edge comprising a plurality of stitches;

(c) knitting one or more fibers to form a second wing portion extending from the toe portion and knittingly connected to the toe portion and laterally separated from the first wing portion by an initial separation distance, the second wing portion having a second edge comprising a plurality of stitches;

(d) disposing the stitches of the first edge and the stitches of the second edge in a rib knit configuration on the front needle bed and the back needle bed; and

(e) knitting the first wing portion to the second wing portion to form a heel portion, wherein knitting the first wing portion to the second wing portion comprises;

(e1) transferring the stitches of the first edge to the front needle bed and transferring the stitches of the second edge to the back needle bed;

(e2) optionally knitting at least one additional knitted course on each of the first and second wing portions to provide one stitch on each active needle of the front needle bed and the back needle bed;

(e3) racking the back needle bed and/or the front needle bed to reduce the lateral separation between the first wing portion and the second wing portion from the initial separation distance to an intermediate separation distance;

(e4) transferring the stitches of the first edge from the front needle bed to the back needle bed and transferring the stitches of the second edge from the back needle bed to the front needle bed; and

(e5) racking the back needle bed and/or the front needle bed back to the position of step (e1) to reduce the lateral separation between the first wing portion and the second wing portion from the intermediate separation distance to a knitting separation distance.

2. The method of claim 1, wherein knitting the first wing portion to the second wing portion further comprises:

(e6) transferring the stitches of the first edge from the back needle bed to the front needle bed and transferring the stitches of the second edge from the front needle bed to the back needle bed;

(e7) knitting a welt between the first wing portion and the second wing portion;

(e8) knitting at least one additional course on each of the first edge and the second edge to reduce the number of held stitches on each of the first edge and the second edge by at least one stitch;

(e9) racking the back needle bed and/or the front needle bed to reduce the lateral separation between the first wing portion and the second wing portion;

(e10) transferring the remaining held stitches of the first edge from the front needle bed to the back needle bed and transferring the remaining held stitches of the second edge from the back needle bed to the front needle bed;

(e11) racking the back needle bed and/or the front needle bed back to the position of step (e8);

(e12) knitting at least one additional course on each of the first edge and the second edge to reduce the number of held stitches on each of the first edge and the second edge by at least one stitch;

(e13) racking the back needle bed and/or the front needle bed to reduce the lateral separation between the first wing portion and the second wing portion;

(e14) transferring the stitches of the first edge from the back needle bed to the front needle bed and transferring the stitches of the second edge from the front needle bed to the back needle bed; and

(e15) racking the back needle bed and/or the front needle bed back to the position of step (e8).

3. The method of claim 2, wherein knitting the first wing portion to the second wing portion further comprises repeating steps (e8) through (e15) until substantially all of the stitches of the first edge and substantially all of the stitches of the second edge have been used to knittingly join the first wing portion to the second wing portion to form the heel portion.

7. The method of claim 1, wherein the initial separation distance is greater than a maximum racking distance of the stitches of the first edge and the stitches of the second edge in the rib knit configuration on the front needle bed and the back needle bed, and wherein the maximum racking distance is the maximum distance that the front needle bed and/or the back needle bed can be racked without breaking one or more loops of the rib knit configuration or one or more needles of the front needle bed and/or the back needle bed.

8. The method of claim 7, wherein the initial separation distance is greater than about 3 inches.

9. The method of claim 7, wherein the knitting separation distance is equal to or less than the maximum racking distance.

10. The method of claim 9, wherein the knitting separation distance is about 1 inch.

12. The method of claim 1 further comprising:

(g) knitting one or more fibers to form an insole portion extending from the heel portion, wherein the insole portion is knittingly connected to the heel portion.

13. The method of claim 12 further comprising:

(h) joining the insole portion to one or more of the first wing portion, the second wing portion, and the toe portion.

14. The method of claim 13, wherein the insole portion is joined to one or more of the first wing portion, the second wing portion, and the toe portion by sewing or linking.

15. The method of claim 1, wherein knitting is carried out using a V-bed knitting machine.

4. A method of making a knitted shoe component using a knitting machine having a front V needle bed, a back V needle bed, a front top needle bed, and a back top needle bed, the method comprising:

(a) knitting one or more fibers to form a toe portion;

(b) knitting one or more fibers to form a first wing portion extending from the toe portion and knittingly connected to the toe portion, the first wing portion having a first edge comprising a plurality of stitches;

(c) knitting one or more fibers to form a second wing portion extending from the toe portion and knittingly connected to the toe portion and laterally separated from the first wing portion by an initial separation distance, the second wing portion having a second edge comprising a plurality of stitches;

(d) disposing the stitches of the first edge and the stitches of the second edge in a rib knit configuration on the front V needle bed and the back V needle bed; and

(e) knitting the first wing portion to the second wing portion to form a heel portion, wherein knitting the first wing portion to the second wing portion comprises;

(e1) transferring stitches of the first edge from the back V needle bed to the front top needle bed and transferring stitches of the second edge from the front V needle bed to the back top needle bed;

(e2) racking the back needle beds and/or the front needle beds to reduce the lateral separation between the first wing portion and the second wing portion from the initial separation distance to an intermediate separation distance;

(e3) transferring the stitches of the first edge from the front top needle bed to the back V needle bed and from the front V needle bed to the back top needle bed, and transferring the stitches of the second edge from the back top needle bed to the front V needle bed and from the back V needle bed to the front top needle bed; and

(e4) racking the back needle beds and/or the front needle beds back to the position of step (e1) to reduce the lateral separation between the first wing portion and the second wing portion from the intermediate separation distance to a knitting separation distance.

5. The method of claim 4, wherein knitting the first wing portion to the second wing portion further comprises:

(e5) transferring the stitches of the first edge from the back top needle bed to the front V needle bed and transferring the stitches of the second edge from the front top needle bed to the back V needle bed;

(e6) knitting a welt between the first wing portion and the second wing portion;

(e7) knitting at least one additional course on each of the first edge and the second edge to reduce the number of held stitches on each of the first edge and the second edge by at least one stitch;

(e8) transferring the remaining held stitches of the first edge from the back V needle bed to the front top needle bed and transferring the remaining held stitches of the second edge from the front V needle bed to the back top needle bed;

(e9) racking the back needle beds and/or the front needle beds to reduce the lateral separation between the first wing portion and the second wing portion;

(e10) transferring the remaining held stitches of the first edge from the front top needle bed to the back V needle bed and from the front V needle bed to the back top needle bed, and transferring the remaining held stitches of the second edge from the back top needle bed to the front V needle bed and from the back V needle bed to the front top needle bed;

(e11) racking the back needle beds and/or the front needle beds back to the position of step (e7); and

(e12) transferring the remaining held stitches of the first edge from the back top needle bed to the front V needle bed and transferring the remaining held stitches of the second edge from the front top needle bed to the back V needle bed.

6. The method of claim 4, wherein knitting the first wing portion to the second wing portion further comprises repeating steps (e7) through (e12) until substantially all of the stitches of the first edge and substantially all of the stitches of the second edge have been used to knittingly join the first wing portion to the second wing portion to form the heel portion.

11. The method of claim 4, wherein the initial separation distance is greater than a maximum racking distance of the stitches of the first edge and the stitches of the second edge in the rib knit configuration on the front needle bed and the back needle bed, wherein the knitting separation distance is equal to or less than the maximum racking distance, and wherein the maximum racking distance is the maximum distance that the front needle bed and/or the back needle bed can be racked without breaking one or more loops of the rib knit configuration or one or more needles of the front needle bed and/or the back needle bed.

16. The method of claim 4, wherein knitting is carried out using a four-bed flat knitting machine.