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Knife holder clamp apparatus for cut pile tufting machine

  • US 4,817,541 A
  • Filed: 04/04/1988
  • Issued: 04/04/1989
  • Est. Priority Date: 04/04/1988
  • Status: Expired due to Fees
First Claim
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1. In a cut pile tufting machine having means for supporting a base fabric for longitudinal movement in a feeding direction through said machine, a plurality of transversely spaced reciprocal needles for introducing yarns through said base fabric to form loops, a looper hook for each needle on the opposite side of the base fabric from the needles and adapted to cooperate with a corresponding needle to seize and hold a yarn carried by the needle to form a loop, a cutting apparatus comprising:

  • (a) a knife holder module comprising a knife block member having front and rear portions and top and bottom portions, and an elongated staff having upper and lower portions and opposed sides,(b) a plurality of elongated knife slots extending upright through said block member,(c) a plurality of elongated knives, each knife being received in a corresponding knife slot,(d) securing means in said block member for engaging and holding each knife in said corresponding knife slot to project above said knife block member,(e) said staff being fixed to the rear portion of said knife block member,(f) an elongated knife bar mounted below said looper hooks for cooperative reciprocable movement with said looper hooks, said knife bar having a front face, a top face, and a bottom face,(g) a plurality of upright rib members projecting from said front face of said knife bar, each of said rib members being disposed at an angle to the longitudinal axis of said knife bar, said adjacent rib members being transversely spaced to define recesses between said rib members,(h) a transverse clamping slot formed in each rib member, each clamping slot having upper and lower portions and opening forward,(i) said upper portion of each clamping slot defining a depending catch element,(j) said elongated staff comprising an elongated rearward opening channel adapted to slip-fit over and receive a corresponding rib member in an operative position in which said knives project upward between corresponding looper hooks,(k) a clamp element on said staff adapted to be inserted within said clamping slot and fit behind said catch element in said operative position, and(l) detent means in the lower portion of said slot for securing said clamp element against said catch element to hold said staff upon said corresponding rib member in said operative position.

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