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Norman Wignall: Tufting machines and method. Cupa Engineering, John C Smith Jr, August 1, 1978: US04103630 (6 worldwide citation)

A double sided pile fabric is formed by a reciprocating needle in cooperation with latchless loppers on opposite sides of the base fabric, the reciprocating needle guiding the yarn through the base fabric to form loops on opposite sides thereof. The latchless lopper on one side retains alternate loo ...


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