TM 10-8400-201-23
6-7.
REPAIR-Continued
(c) Quality control. Adjust heating, pressing, and cooling times as required for the specific iron or automatic
heat seal mending equipment being used. Check the quality of the adhesive bond periodically and
adjust heating times and temperatures of the heating plate as follows:
Check test. Periodically during the work and when adjusting the iron, test a patch which has cooled for
about five minutes by picking with the fingers at an edge of the patch until a tab about ¼ to ½ inch long
is formed. Pull hard on the tab with fingers. A well-bonded tab will be difficult to peel off and will
indicate that iron adjustment and heating time are adequate. Replace the check test patch with a new
patch.
1.
If the adhesive strikes through the patch cloth, too much heat has been applied. Reduce time of
pressing or temperature of the iron. A small amount of strike through is not objectionable provided
the patch meets the about cited check test
2.
A bonded patch which has lifted edges will be ironed. A bonded patch which has been subjected to
the check test will be replaced.
3.
When patching by a special automatic press, the platen, temperature, dwell time, dwell pressure, and
other details should be in accordance with the press manufacturer's instructions.
(3) Stitching and restitching. The location, stitch type, thread size, and stitches per inch for the parka and
trousers are listed in tables 6-1. All stitches, seams, and stitching shall conform to FED-STD-751. Seam allowances
shall be maintained with seams sewn so no raw edges, run-offs, pleats, puckers, or open seams occur except where they
are supposed to occur (pleats in the trousers knees). When two or more methods of stitching are given for the same
operation, any or one may be used.
Table 6-1. Stitching Instructions (Parka and Trousers)
THREAD SIZE
STITCHES
OPERATION
STITCH TYPE
NEEDLE
BOBBIN
PER INCH
Parka:
General
301
30
30
10 - 13
Assembling hood
301 or 401
30
30
10 - 13
Bartacking:
3/8 to ½ inch
30
30
28 per tack
Draw cord
center back
hood, vent opening
center back seam,
hood attachment
seam ends, and
bottom hem ends
Eyelet
502 or 503
50
50
26-32 per
eyelet
Overedge stitch
515 or 516
30
30
10 - 13
for storage
pouch
Change 2
6-6
