C Using One Machine and One Comber-Board: The Machine Unequally Divided and the Comber-Board Equally Divided
To explain, take the regular upholstery fabric tie-up known as “petty point,” on a 600 machine 12 rows in depth. 600 ÷ 12 = 50 + 2 rows reserve = 52 rows in width. We find used—
| 1 | row for selvedge. |
| 10 | rows for binders (B). |
| 41 | rows for figure (A). |
| --- | |
| 52 | rows. |
41 (rows figure) × 12 (needles for one row) = 492 needles to be used for figure.
10 (rows binder) × 12 (needles for one row) = 120 needles to be used for binder.
Suppose we have four divisions in loom, hence, four harness-cords to one leash, for the figure section, or 492 × 4 = 1968 ends of warp used for figure. 1968 threads of figure warp require the same number of threads of ground warp, which must be divided by 120, the number of needles and hooks set apart for it in the machine, or—as each needle and hook carries one leash—120 leashes. 1968 ÷ 120 = 16 repeats; and 48 leashes, or four rows in the machine, must each have 17 harness-cords carrying 816 threads; and 72 leashes, or six rows in the machine, must each have 16 harness-cords carrying 1152 threads, = 1968.