Most industrial cylinder arm machines.
Heel the treadle to raise the presser foot — load the circular collar over the rollers and under the foot — load the shirt over the rollers and under the foot. A touch of the knee switch shifts the folder to the left and expands the rollers bringing the tape in line with the presser foot. Drop the foot and sew — approximately 1" from the shoulder seam the folder is shifted to the right by depressing the knee switch — continuation of sew will allow the tape to be cut by the edge trimming knife — this produces a neat rounded finish on the tape. The tape may be inserted or retracted at any point in the operation.
Note: The 273-37S operates the same as the 273-37 except the rollers, while adjustable for size, do not expand or retract pneumatically.