FIG. 356.
FIG. 357.
In weft pile fabrics the pile weft is usually “extra weft” issuing out of the ground fabric only between every pair of ends. This forms grooves or “races” in the fabric, which allow of the insertion of a “knife and guide” which cuts the pile about the middle of the float. At [Fig. 356] the ground fabric is plain, and between each ground pick there are three pile picks. The first pile pick passes under the first end, the second pick under the third end, and the third pick under the fifth end, and if these are repeated there are formed small grooves for the cutter’s knife every two ends. The pattern is given on point paper at [Fig. 358], extended a little in each direction as the pattern repeats on only six ends and eight picks. The ground picks (plain) are put on in circles. A large number of picks per inch are required; in a common make about 260 picks per inch of 60’s weft are used, and about 74 warp threads per inch, the counts of warp being usually 2-70’s.
FIG. 358.
If there are 260 picks per inch, and one pick out of every four belongs to the plain ground fabric or “back,” as it is sometimes called, there will be sixty-five picks per inch in the plain, and the pile weft is “extra” material forming grooves for the cutter’s knife on the face of the cloth.
FIG. 359.