An Improved Apparatus for Covering and Adjusting Lithographic Rollers for Printing.
Year: 1886

page_text: Date of Application, 27th Aug., 1886.
Complete Left, 10th June, 1887.
Complete Accepted, 22nd July, 1887.
RESERVE
An Improved Apparatus for Covering and Adjusting Lithographic
Rollers for Printing.
We JOHN ISRAEL HEMMINGWAY of Dixon Street Sheffield in the County of York
Engineer, & BENJAMIN BARKER of 4 Stalker Place Ecclesall Road Sheffield in the
County of York, Machinist do hereby declare the nature of this invention to be as
follows:-
The object of our Invention is to produce a durable satisfactory and therefore
economical apparatus for putting on and adjusting the coverings of rollers used for
Lithographic printing. Our Invention as applied consists of one or more India
Rubber ring or rings of any suitable form and of smaller diameter than the roller.
The ring or rings are fitted into a box or case made of Brass or other metal or of
wood. The rollers are coverd in the ordinary way one end of the covering is then
made secure. The apparatus is then pressed over the roller which tightens the
coverings and gives an uniform tension thereto.

page_text: JOHN ISRAEL HEMMINGWAY Dixon Street Sheffield Engineer BENJAMIN BARKER,
Machinist 4 Stalker place, Ecclesall Road, Sheffield, both in the County of York,
do hereby declare the nature of this invention and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:
The object of our invention is an improved method of, and apparatus for covering
and adjusting Lithographic & other rollers.
It consists chiefly in the adaption of an India rubber ring or rings for pressing the
skin and other covering evenly and tightly upon the roller by the India rubber ring
taking any slackness before it to the end of the rollers, without increasing the diameter
of the roller as is the case when the skin is tightened by the addition of more
thicknesses of flannel.
In carrying our invention into effect we make an apparatus consisting of a box,
plates or washers and India rubber rings.
The box may be of any suitable shape preferably circular, the section of which may
be in the form of the letter having two or more handles.
The plates or washers are made to correspond with the inside diameter and shape of
the box, the holes in the several plates or washers varying in size to suit rollers of
different diameter.
The India rubber rings vary in size to suit rollers of different diameter and can be
imade of any suitable section.
In putting the apparatus into use to cover a new roller, we first stitch a flannel
or cloth upon the roller in the ordinary way and secure the end, we then stretch
an India rubber ring of suitable size upon the end of the roller so secured, we next
place upon the India rubber ring a plate or washer nearly corresponding in size to the
diameter of the roller, we then put on the box and press down the apparatus by the
handles thereby firmly and tightly bedding the flannel or cloth upon the roller. If
more than one thickness of flannel is used the process is repeated-one end of the
skin is then put on the roller and drawn down by the apparatus. When the skin is drawn
far enough the one end is secured and the apparatus passed over several times until
the required firmness is obtained.
5

page_text: The box and plates or washers may be made of Iron, Brass, or other suitable
metal or other substance such as wood, paper mache, or vulcanite.
The elastic rings may be made of vulcanized India rubber-non-vulcanized India
rubber or other similar substance.
Having now particularly described and ascertained the nature of our said Invention,
and in what manner the same is to be performed, we declare that what we claim is :
1. The use and application of Elastic rings which may be made of India rubber or
other suitable elastic material for the purpose of covering and adjusting Lithographic
and other rollers.
2. The method or invention of regulating Lithographic and other rollers already in
use without removing the skins or increasing the diameter of the rollers.
Dated this 25th day of May 1887.
JOHN ISRAEL HEMMINGWAY.
BENJAMIN BARKER.