Method and apparatus for forming variable loop pile over level cut loop pile tufts

• US 7,490,566 B2
• Filed: 05/30/2007
• Issued: 02/17/2009
• Est. Priority Date: 03/02/2007
• Status: Active Grant

• Current Assignee: Card-Monroe Corporation
• Original Assignee: Card-Monroe Corporation
• Inventors: Hall, Wilton
• Primary Examiner(s): Izaguirre; Ismael
• Application Number:
  US11/755,366
• Publication Number:
  US 20080210146A1
• Time in Patent Office: 629 Days
• Field of Search: 112 8041- 8071, 112/475.17, 112/475.23
• US Class Current: 112/80.4
• CPC Class Codes: D05C 15/36 by selective cutting of loops

Abstract

A tufting machine that includes spaced rows of needles of inserting yarns into a backing material. The needles are engaged by opposed loopers and level cut loop pile hooks that pass between one another so as to engage the opposite row of needles for forming cut pile and loop pile tufts of yarns in the backing material.

Claims

1. A method of forming spaced rows of cut pile and loop pile tufts in a base fabric, comprising:

moving a base fabric along a path of travel through a tufting zone;

engaging the base fabric with a first row of spaced needles carrying a plurality of yarns through the base fabric;

engaging the base fabric with a second row of spaced needles, transversely spaced from the first row of needles across the tufting zone and carrying a second plurality of yarns through the base fabric;

moving a plurality of level cut loop pile hooks having a pickup across the tufting zone between the needles of the second row of needles and into engagement with the yarns carried by the needles of the first row of needles;

selectively engaging a series of clips associated with each of the level cut loop pile hooks so as to move the clips between retracted and extended positions for forming cut or loop pile tufts of the yarns carried by the first row of needles;

providing a series of knives of an opposite hand cutting to the pickup of each of the level cut loop pile hooks, each positioned adjacent one of the level cut loop pile hooks and reciprocating the knives into selective engagement with loops of yarns captured along the level cut loop pile hooks to form the cut pile tufts in the base fabric; and

moving a series of loopers across the tufting zone between the needles of the first row of needles and into engagement with the yarns carried by the needles of the second row of needles to form the loop pile tufts in the base fabric.

2. The method of claim 1 and wherein providing the knives adjacent each level cut loop pile hook comprises positioning each knife on an opposite side of each level cut loop hook from an associated one of the needles of the first row of needles.

3. The method of claim 1 and further comprising staggering the first and second rows of needles up to approximately ½

inch apart.

4. The method of claim 1 and wherein providing the knives adjacent each level cut loop pile hook comprises positioning each knife along a pickup side of an associated level cut loop pile hook.

5. The method of claim 1 and wherein moving the plurality of level cut loop pile hooks and moving the plurality of loopers comprises passing the level cut loop pile hooks through gaps between the loopers and passing the loopers through gaps between the level cut loop pile hooks, interleaving the loopers and level cut loop pile hooks as the level cut loop pile hooks and loopers engage the needles of the first and second rows of needles, respectively.

6. A method of forming tufted articles having cut pile tufts and loop pile tufts, comprising:

moving a backing through a tufting zone;

reciprocating a first and a second row of needles, each carrying a plurality of yarns into and out of the backing moving through the tufting zone;

moving a series of spaced level cut loop hooks positioned along a cut pile side of the tufting zone between a series of loopers positioned along a loop pile side of the tufting zone and into engagement with the needles of the first row of needles to pull loops of yarn therefrom to form cut pile and loop pile tufts;

moving and intermeshing the loopers between the level cut loop hooks and engaging the needles of the second row of needles to pull loops of yarns therefrom for forming loop pile tufts;

selectively moving a series of clips, each associated with one of the level cut loop hooks, between an engaging position wherein the loops of yam engaged and pulled from the needles by the level cut loop pile hooks are prevented from being captured along selected ones of the level cut loop hooks to thus selectively form loop pile tufts, and a non-engaging position enabling the loops of yarns to be captured on the level cut loop pile hooks to selectively form cut pile tufts; and

engaging and severing the loops of yarns captured along the level cut loop pile hooks with a series of knives to form the cut pile tufts.

7. The method of claim 6 and further comprising positioning each of the knives along a pickup side of a level cut loop pile hook associated therewith.

8. The method of claim 7 and further comprising providing knives of an opposite hand cutting to the pickup of the level cut loop pile hooks.

9. The method of claim 6 and further comprising providing knives of an opposite hand cutting to a pickup of the level cut loop pile hooks.

10. The method of claim 6 and further comprising staggering the first and second rows of needles up to approximately ½

inch apart.