Page 106 - Industrial Cutting of Textile Materials

Manual cutting of textile materials 93

Fig. 7.11 Manual machines to make notches and drill marks by Eastman.

Fig. 7.12 Components with their notches.

If the depth of a notch is too great, it may make a hole in the fabric next to the seam.
If the notches are too shallow, they may not be noticeable and could disappear entirely
if the fabric frays. The components must then be returned to a cutting section to recut
the missing notches.
Notches are usually cut by the same machine that is used to cut the contours of
components. Large- and medium-size components and their notches are cut by a
straight-knife machine. Small components and their notches are cut by a band-knife
machine. Because of the shape of the cutting blade, a round-knife machine cannot be
used to cut notches (see Section 7.4.3).
Notches may be also burnt into the fabric using a special hot notcher machine (see
Fig. 7.13) (see Section 8.7). The heated edge of the machine burns ‘V’-shaped notches