The roller-stand containing the distributing cylinder should be regulated
to the height of the press, bringing the shelf or bridge even with the
corner irons, and at sufficient distance from the bed to allow it to run
clear; the stand should then be firmly braced, as the constant turning of
the rounce is very apt to loosen it; meanwhile being cautious to observe
that the rounce, in its revolutions, does not come in contact with the
frame of the tympan when up. The position of the distributing cylinder
should be sufficiently high to allow the two composition rollers, at
least one inch apart, to rest on its top without danger of touching the
shelf or bridge in front. It is advantageous to nail two narrow strips
of sole leather on the face of the shelf, about eight or ten inches from
each end, which, acting as bearers, cause the rollers to pass very
smoothly over them.
[Illustration: ROLLER STAND.]
The roller-handle while in use should lie in a horizontal position, the
back end being supported by a bar of wood or iron running parallel with
the distributing cylinder. There should be a notch, or hook, about two
inches from the end of the handle, to catch on the wooden supporter, to
prevent the rollers from jumping forward while distributing or changing.
It is also necessary to have a back-board for the end of the roller
to strike against in coming off the form, to prevent the rollers from
falling backward.
The ink-block is placed about five or six inches to the right of the
roller-handle, and about on a level with it. It is furnished with the
ink-slice, and a brayer, or a small roller about four or five inches
long, and of the same circumference with the larger rollers, being cast
in the same mould.