Tufting machine yarn feed pattern control

Abstract

A tufting machine has a yarn feed pattern assembly including a housing having a mounting plate for mounting a multiplicity of yarn feed rollers from the exterior of said mounting plate and a multiplicity of servo motors connected to said mounting plate on the interior of said housing. Each servo motor is connected to a respective feed roller. A multiplicity of tubes extend within said housing, half the tubes directing yarn from a source to respective rollers and half of the tubes directing yarn from the rollers to respective needles. The guide tubes direct yarn from the interior of said housing through said mounting plate where the yarn is trained about a respective roller and directed back into the yarn guide leading toward the needles of said tufting machine.

1. A yarn feed roller assembly for a tufting machine comprising a hollow housing having a mounting plate, a multiplicity of drive rollers rotatably mounted on said mounting plate, a multiplicity of variable speed motors mounted on said mounting plate, each motor having an output shaft connected to one of said rollers, and a multiplicity of yarn guide tubes mounted within said housing, there being two  a first guide tubes  associated with each roller, one  for directing yarn from a source to the roller and the other for directing yarn from the roller to the tufting machine , and a guide having an aperture through which said yarn is directed from the roller to the tufting machine. 
     
     
       2. A yarn feed roller assembly as recited in  claim 1 , wherein said mounting plate comprises an exterior wall of said housing and includes an exterior surface and an interior surface, said rollers extending from the exterior surface and said motors extending from said interior surface. 
     
     
       3. A yarn feed roller assembly as recited in  claim 1 , including a member for frictionally engaging each roller to apply a frictional force to yarn trained about said roller. 
     
     
       4. A yam feed roller assembly as recited in  claim 1 , wherein said tufting machine includes a head and brackets for attaching said housing to said head. 
     
     
       5. A yarn feed roller assembly as recited in claim  1   6 , wherein said housing is open at an upper end and a lower end, said first guide tubes associated with said roller for directing yam from a source to the roller extend from said upper end and the second guide tubes associated with each roller for directing yarn from the rollers to the tufting machine extend to said lower end of said housing. 
     
     
       6. The yarn feed roller assembly as recited in  claim 1  wherein the guide roller comprises a second guide tube associated with each roller for directing yarn from the roller to the tufting machine. 
     
     
       7. A yam feed roller assembly for a tufting machine comprising a hollow housing having a mounting plate, a multiplicity of drive rollers rotatably mounted on said mounting plate, a multiplicity of variable speed motors mounted on said mounting plate, each motor having an output shaft connected to one of said rollers, and a multiplicity of yarn guide tubes mounted within said housing, there being a first guide tube associated with each roller, for directing yarn from a source to the roller, said yarn then directed from the roller to the tufting machine.