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2. Cutting and joining aprons and
clearer cloths.
3. Fitting roller cots on roller
bosses in the correct manner.
4. Operating the roller fitting and
roller grinding machines.
5. Checking the eccentricity of
roller cots.
6. Preparing varnish and applying
the varnish to top rollers.
7. Detecting faulty top rollers,
aprons and clearers.
III. Skill Standard:
No particular standard is quoted
for this job except the ability to cut,
join and fit aprons, top roller coverings
and clearer roller cloths, also
carry out grinding and varnishing as
necessary.
IV. Trade Tests:
1. Cover a top roller with cloth and
leather, then varnish it, the whole
test must be completed within a
reasonable time.
2. Mount a number of synthetic
roller cots and grind according
to specified size.
3. Cut and join a bottom roller
apron in position on a running
frame.
4. Check a certain number of
rollers and aprons and be able to
indicate any irregularities.
5. Clean and lubricate a number of
top rollers.
6. Answer questions satisfactorily
on:
(a) The importance of using
concentric rollers for drafting.
(6) The use of different hardnesses
of cots for different
raw materials and spinning
processes.
(c) The bad effects on drafting
of poorly cut and joined
aprons.
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