| 摘要 |
In a sliding needle bar tufting machine in which displacement of a needle bar transversely of a tufted fabric undergoing manufacture to create a pattern in the fabric is effected by the action of rotary cam means on a needle bar carrier member, the invention provides single or single-acting cam follower means on the needle bar carrier member and a pair or appropriately spaced rotary cams of conjugate shape acting on said cam follower means. The use of two cams of conjugate shape makes it unnecessary for the individual cams to be symmetrical about their centers of rotation and thereby enables the production in the fabric of patterns which are asymmetrical in character. |
