1
Roy T Card: Dual shiftable needle bars for tufting machine. Tuftco Corporation, Harrington A Lackey, January 4, 1983: US04366761 (62 worldwide citation)

A tufting machine having a pair of transversely shiftable needle bars and pattern-controlled discrete actuator means for independently shifting each of said needle bars in accordance with predetermined patterns.


2
Dual shiftable needle bars for tufting machine. February 2, 1984: WO/1984/000388

A tufting machine (10) having a pair of transversely shiftable needle bars (27, 28) and pattern-controlled discret actuator means (84, 90) for independently shifting each of said needle bars (27, 28) in accordance with predetermined patterns.


3
Card Roy T: Dual shiftable needle bars for tufting machine.. Tuftco, July 18, 1984: EP0113343-A1

A tufting machine (10) having a pair of transversely shiftable needle bars (27, 28) and pattern-controlled discret actuator means (84, 90) for independently shifting each of said needle bars (27, 28) in accordance with predetermined patterns.