Machines of Class 11 have a cylinder bed and a drop feed,
and are especially designed for stitching heavy tubular
shaped articles in cloth or leather. They are used in the
manufacture of mail bags, coal bags, ore bags, military
boots and a great variety of similar articles. Some of the
machines of Class 11 are intended for making grommet holes
and overseaming or zig-zag stitching in heavy fabrics.
Machine 11-29 is used for stitching tents, tarpaulins, wagon
covers and heavy tubular shaped articles in canvas. This
machine is regularly fitted with alternating pressers,
flexible shuttle race, foot lifter, 23^ inch cylinder
shuttle, two speed balance wheel and feeds the work across
the cylinder. The machine can be readily adjusted to make
stitches varying in length up to y* inch, as desired.