Process of installing knives in a cut pile tufting machine

• US 4,669,171 A
• Filed: 02/28/1986
• Issued: 06/02/1987
• Est. Priority Date: 08/09/1984
• Status: Expired due to Term

• Current Assignee: Card-Monroe Corporation
• Original Assignee: Card-Monroe Corporation
• Inventors: Card, Joseph L., Card, Roy T.
• Primary Examiner(s): NOT, DEFINED
• Application Number:
  US06/834,562
• Time in Patent Office: 459 Days
• Field of Search: 29/465, 29/446, 29/467, 76/107 R, 112/79 R, 112/80.6, 112/79 A, 112/79 FF, 83/700, 28/212, 28/222
• US Class Current: 29/446
• CPC Class Codes: D05C 15/22 Loop-catching arrangements, e.g. loopers; Driving mechanisms therefor
• CPC Class Codes: D05C 15/24 Loop cutters; Driving mechanisms therefor
• CPC Class Codes: Y10T 29/49863 with prestressing of part
• CPC Class Codes: Y10T 29/49897 Registering mating opposed tool parts [e.g., registering a punch and a cooperating die]

Abstract

A group of knives for a cut pile tufting machine are preassembled in a knife holder carried by a bracket, as the bracket is held in a jig. the bracket is then removed from the jig and inserted into one of a plurality of transverse parallel angling slots in a carrier member of the machine, the knives and bracket being moved in a linear path until a stop on the bracket engages the carrier member to indicate that the knives are in proper position for cutting action with respect to this loopers.

Claims

1. Process of installing knives in a cut pile tufting machine comprising the steps of:

(a) preassembling a group of flat, elongated knives, each knife having a cutting edge at one end, in a knife holder so that their ends with the cutting edges protrude prescribed distances in one direction from the knife holder as the knife holder holds them in spaced, juxtaposed, parallel relationship;

(b) clamping the knives in said holder;

(c) moving said knife holder along a prescribed and fixed path with respect to a carrying member, on which the knife holder will subsequently be mounted for reciprocation, so as to progressively move the cutting edges of said knives toward and between the spaces of adjacent loopers and urged in a biased condition toward and against the sides of said loopers on the tufting machine for inserting said ends respectively between said loopers;

(d) arresting the travel of said knife holder after it has travelled to a prescribed position along said path; and

thereafter

(e) locking said knife holder in its prescribed position, to thereby simultaneously fix the position of the cutting edges of all said knives in positions for cutting engagement with their respective loopers.

2. The process defined in claim 1 in which all of said knives are simultaneously flexed away from their respective loopers as their cutting edges approach such loopers and thereafter the flexed knives are released so that the cutting edges are biased by the knives into engagement with their respective loopers.

3. The process defined in claim 1 wherein said prescribed path is a linear path.

4. The process defined in claim 1 wherein the step of locking the knife holder includes flexing the knvies so as to provide access to a detent which locks the knife holder in its prescribed position.