b. Darning. Darn a hole or tear in the container fabric that does not exceed 1 inch in length or diameter using size
E thread and a darning machine. There is no limit to darns that may be applied, provided they do not weaken or reduce
the original strength of the fabric more than 10%. If damage is in the lined portion of the container body and only the
nylon duck is damaged, darn through duck and felt. If felt is also damaged, remove damaged area before darning duck
fabric. Then plug felt as in c.(3) below.
c. Patching. There is no limit to the number of times the container body may be patched. Patch a hole or tear
that exceeds 1 inch in length or diameter following procedures in (1) or (2) below. Use nylon duck cloth according to
original construction for patching outside, and 1/4 inch thick felt for plugging inside lining. Use an HD sewing machine,
size 3 thread, and 6 to 8 stitches per inch.
(1) To patch a lined portion of the container when the felt is not damaged, cut nylon duck patch 2 inches
beyond circumference of damaged portion. Turn under edges of patch ½ inch and center patch over damaged area.
Sew patch to container body with a double row of stitching as shown.