Leathers for Covering Rollers.
Year: 1886

page_text: Leathers for Covering Rollers.
I, JOSEPH STANDRING DRONSFIELD of the firm of Dronsfield Brothers, of the
Atlas Works, Oldham in the County of Lancaster, Machine Makers, do hereby
declare the nature of my invention for IMPROVEMENTS IN PRESSES USED IN
PRESSING THE JOINTS OF THE LEATHERS FOR COVERING ROLLERS, and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
"
The presses usually employed for the purpose consist of a horizontal or bent
lever carrying weighted balls, through which momentum is imparted to a quick
threaded screw working within a screw box and attached to guiding pillars, along
which slides the plate imparting the pressure; or of the apparatus commonly
known as the Lever" press which is operated by a lever without the use of a
screw. The leathers for covering the rollers are cut to the size required, with
a bevil on two edges to form a joint which is fastened with a suitable cement,
placed in the press, and pressure applied, either by the rotation of the screw in the
one case, or by direct pressure by means of the lever in the other.
My invention consists in the addition to the press of a four-armed turntable which
revolves round one of the guiding pillars and is used for carrying the leather to be
operated on between the pressing surfaces, instead of its being placed on the
bedplate direct as in ordinary cases. Each arm of the turntable forms a table or
rest on which the leathers are placed to be jointed, the leathers being put round
the arm in the form of a loose sleeve. The cement is then applied to the bevil
edges & the joint formed, and the arm is then turned under the press and remains
under pressure until the operation of jointing is completed on the next arm of the
table. By this means greatly increased facility and rapidity in handling the
machine is obtained.
The construction of the apparatus according to my invention is clearly shown on
the drawing, where Fig. 1 is a front elevation, Fig. 2 a plan from A B, and
Figs. 3 & 4 enlarged views of the turntable.
Referring to the figures is the lever for rotating the screw b, c is the bedplate
and & the pressing plate of the press, e e¹ are the guiding pillars, el being generally
at a greater distance from the centre of the press than e, to allow of the introduction

page_text: of the turntable f. The turntable f is provided with arms g g¹g³ g³ The under-
surface of the turntable working upon the bedplate c has four teeth formed upon
it (k)-one side of each tooth being in the form of an inclined plane-and, upon
the bedplate is cast one or more similar teeth.
As the turntable is moved round, the inclined planes of the teeth on the turn-
table and the bedplate which are in contact, slide upon each other, which causes
the turntable to be gradually raised so that the leather sleeve placed round the
arm g may enter the press, clear of the bottom pressing surface a Further
movement of the turntable brings the perpendicular edges or sides of the teeth
together, causing the turntable to drop at once to its lowest point, with its arm g, 1
and the leather sleeve upon it, resting on the lower pressing surface c, in the proper
position for pressing. During the pressing of the leather on g, another joint is
prepared on g¹, and is ready in its turn for pressure when that on g is completed.
This action is repeated continuously for each arm as long as may be required.
Having now particularly described and ascertained the nature of my said 1
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
The combination and arrangement with screw or lever presses of a turntable,
to facilitate the jointing of the leathers for the purposes mentioned, substantially
as hereinbefore described & illustrated by Figures 1, 2, 3 & 4 of the Drawing.
2
Dated this 21st day of July 1880.
JOSEPH STANDRING DRONSFIELD.