Improved Pressing Roller for Paper Machines.
Year: 1898

page_text: Date of Application, 2nd May, 1898-Accepted, 30th July, 1898
COMPLETE SPECIFICATION.
Improved Pressing Roller for Paper Machines.
We, FRANZ KILIAN, No. 22, Elizabethstrasse, Manufacturer, and CARL. TELLER,
No. 27, Franzstrasse, Merchant, both of Dessau, in the German Empire, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following
statement:-
Our invention relates to an adjustable pressing roller for paper making.
A very serious draw-back connected with the pressing rollers hitherto usually
employed in the manufacture of paper, consists in the circumstance that the re-
covering of them with fresh wire gauze is always a very tedious and difficult opera-
tion, and moreover, is seldom effected perfectly satisfactorily. In order to obtain
the covering satisfactorily tightly strained and firmly fixed, there is requisite con-
siderable skill and experience. In many cases, moreover, the tubular cover,
formed of extremely thin wire gauze, is either bent or torn, which of course adds
considerably to the cost of the operation. In small paper-mills, where the necessary
tools and experience are wanting, it has hitherto been impossible to re-place the
wire gauze covers, and consequently the pressing roller had to be sent to the manu-
facturer for re-covering, whenever such an operation became necessary, which of
course was very inconvenient in practice. These drawbacks are obviated by the
invention which forms the subject of the present application for Letters Patent.
. The invention consists essentially of an improved pressing roller constructed
of several longitudinal segments which are capable of displacement radially from
or towards the axial line of the roller. The accompanying drawing illustrates a
roller of this description.
Figure 1 shows the central portion thereof in longitudinal section and
Figure 2 shows a transverse section, a portion of one segment being broken
away. In these figures the axle a of suitable construction is shown enclosed in
a sleeve b. The said axle a has attached to it at suitable points four wedges c
each respectively projecting towards one of its four sides, and against each of
these wedges a wedge supported in a slot of the sleeve b rests. The outer
wedge possesses a flange by means of which it is secured to the cylinder
segment f. The segments f are connected to one another by bars g in the well
known manner, and over these the wire forming the cover of the roller is wound
spirally.
In the rollers hitherto constructed which are formed of a single piece, it was
only necessary to wind the spiral coil of wire tolerably tightly upon them, and to
solder the same slightly to the longitudinal bars. In the roller above described,
however, it is advisable to solder the wires forming the outside of the roller firmly
to the bars. As already stated the segments are capable of displacement radially
with respect to the axis of the roller. This displacement is effected by the moving
of the axle a in the direction of the arrow (Fig. 1) which adjustment is effected by
means of the screw and nut m. When it is desired to cover the improved roller
with a wire gauze, the segments are first brought as close as possible to one another,

page_text: and after the wire gauze cover has been put in place, the separate segments are
caused to diverge from one another by slowly screwing up the nut m thus causing
the diameter of the roller to increase. As this increase need only amount to from
three to five millimetres, the spaces left vacant between the separate segments are
only very small. Moreover, the labour involved in the operation is trifling and
easily effected. The improved roller is equally as durable as the roller already in
use without possessing the above stated drawbacks.
Having now particularly described and ascertained the nature of our
invention, and in what manner the same is to be performed, we declare that what
we claim is;
-
1. The improved adjustable pressing roller for paper making, characterized by
the arrangement that the roller body is constructed of several longitudinal seg-
ments so connected to each other and to the central axis that by means of the
displacement of the said axis the diameter of the roller can be increased or
diminished at will substantially as described and shown in the accompanying
drawing.
Dotad this
dan at
1000
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C., Patent Agents for the Applicant.