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Fabric shift sequencing for pattern producing hollow needle tufting apparatus

  • US 5,205,233 A
  • Filed: 04/06/1992
  • Issued: 04/27/1993
  • Est. Priority Date: 04/06/1992
  • Status: Expired due to Term
First Claim
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1. A method for inserting tufts into a backing material in a tufting machine having a plurality of laterally spaced apart reciprocating needles in a row for penetrating the backing material to insert the tufts therein, said method comprising:

  • feeding said backing material continuously through said machine in a longitudinal direction substantially normal to said row of reciprocating needles;

    shifting said backing material laterally in seriatim a first plurality of steps in a first direction between a pair of adjacent needles and penetrating said backing by said needles after each shift to form in said backing a first plurality of spaced apart tufts by each needle;

    the individual tufts of said first plurality of tufts formed by each needle being disposed along a first line inclined with respect to said longitudinal direction and inclined with respect to said row of needles;

    thereafter shifting said backing material laterally in seriatim a second plurality of steps different in number than the first plurality of steps in a second direction opposite to said first direction and penetrating said backing material by said needles after each shift to form in said backing material a second plurality of spaced apart tufts by each needle different in number than the first plurality of tufts; and

    the individual tufts of said second plurality of tufts formed by each needle being disposed along a second line inclined with respect to said longitudinal direction, inclined with respect to said row of needles and inclined with respect to said first line.

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