Improvements relating to the Manufacture of Paper, Pasteboard and the like, and to Apparatus therefor.
Year: 1890

page_text: Date of Application, 17th Oct., 1890
Complete Specification Left, 17th July, 1891-Accepted, 22nd Aug.,
1801
TROYIDIONAL DE MOITIAT
Improvements relating to the Manufacture of Paper, Pasteboard and
the like, and to Apparatus therefor.
I, BERNHARD JOHANN BECKMANN, of Papenburg, near Hanover, in the Empire
of Germany, do hereby declare the nature of this invention to be as follows:-
My invention relates to a method of manufacturing paper, pasteboard, and the
like, and to apparatus therefor.
The paper or pasteboard made according to this invention has large meshed wire
gauze, wire-work or the like introduced into its interior, this introduction being
effected while the paper pulp is still in a moist condition.
In a common paper-making machine the pulp is continually conducted from the
box or vat over a plate to the endless apron upon which the production of the paper
from the pulp takes place in the well-known manner. Upon a roller placed below
the front roller for the endless apron is wound the strip of wire work to be
introduced into the paper or pasteboard. This strip passes around the front roller
for the endless apron whereby it is carried away. If in this operation the edge of
the above mentioned plate extends close to the endless apron the paper pulp is only
deposited upon the wire work and unites with it in such a manner that the finished
paper or pasteboard will have the wire on its under side. But in order to introduce
the wire work into the paper or pasteboard I provide above the said front roller a
lath or rod, the object of which is to keep the wire work in front of the above-
mentioned plate raised from the endless apron. Under these circumstances the
plate does not bear upon the endless apron and the pulp can partly ooze through
the meshes of the wire work so that it will cover both sides and firmly unite with
the same. The thickness of the lath or rod must correspond to the thickness of the
paper or pasteboard to be produced; for instance, if the paper pulp allowed to flow
upon the endless apron is 3 centimetres thick the lath or rod is preferably made of
such thickness that the pulp extending below the wire-work to the endless apron
will be one and a half centimetres thick and the pulp above the wire-work gauze
likewise.
For obtaining a similar product by means of sieve cylinder engines a sieve
cylinder is arranged to force a thin layer of pulp against the endless apron. After
this has been effected the wire work wound from its roller and conducted over a
number of guide rollers passes upon this layer of the paper pulp, and is carried
away by the endless apron. A second sieve cylinder then forces another layer of
paper pulp against the wire-work. Accordingly the latter lies between two layers
of the paper pulp which are afterwards firmly united with it between rollers. In
order that the product shall be as strong as possible one of the said rollers is suitably
caused to turn in a solution of glue.
My improved method is adapted for making asbestos pasteboard and asbestos
paper used for decorative purposes and as roofing material, furthermore for making
packing-board.and millboard as it enables a considerable strength to be imparted to
them.
1
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements relating to the Manufacture of Paper, Pasteboard and
the like, and to Apparatus therefor.
I, BERNHARD JOHANN BECKMANN, of verlängerter Hoffscanal Papenburg, near
Hanover, in the Empire of Germany, Manufacturer, 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 :-
My invention relates to a method of manufacturing paper, pasteboard and the
like, and to apparatus therefor.
According to this invention the paper or pasteboard has introduced into its
interior large meshed wire gauze, wire work or the like, this introduction being
effected directly in the manufacture of the paper or pasteboard while the paper
pulp is still in a moist condition.
By reason of the special mode of inserting the wire work the latter does not
constitute a separate layer between two layers of paper, but the meshes of the wire
work are completely united or felted with the fibres of the paper so that it
becomes impossible to sever the paper from the said wire work by mechanical
means.
The accompanying drawing shows in diagram three different modes of carrying
the improved method into practice.
Figure 1 illustrates part of a common paper making machine. The endless
metallic apron of the machine is designated by a. Upon this endless apron the
production of the paper or pasteboard from the pulp takes place in the well-
known manner, the pulp being continually conducted from the box or vat over
the outflow plate e to the said apron. Upon a roller placed below the
front roller for the endless apron is wound the strip of wire work to be
introduced into the paper or pasteboard. This strip c passes around the roller f
being carried away by the endless apron a. If in this operation the edge of
the above mentioned outflow plate extended close to the endless apron the paper
pulp would only be deposited upon the wire work and unite with it in such a
manner that the finished paper or pasteboard would have the wire on its under
side. But in order to introduce the wire work into the paper or pasteboard I
provide above the front roller a lath or rod d the object of which is to keep
the wire work e in front of the plate e raised from the endless apron a.
these circumstances the outflow plate does not bear upon the endless apron a
and the pulp can on its way from a to y partly penetrate the meshes of the
wire work so that it will cover both sides and become firmly united or felted
with the same. The thickness of the lath or rod d must correspond to the
thickness of the paper or pasteboard to be produced. For instance if the paper
pulp allowed to. flow upon the endless apron is 3 centimetres thick the lath or
rod is preferably made of such thickness that the pulp extending below the
wire work to the said apron will be 1 centimetres thick and the pulp above
the wire work gauze likewise.
Under
The apparatus represented in Figure- 3 for carrying my improved method into
practice differs only in its details from the above-described arrangement. One
extremity of the lath or board placed above the metallic apron a is pivoted
upon journals g whilst its other extremity is suspended by two rods h. These
rods bear with their upper bent extremity upon the cams provided upon a
rotary shaft which is placed transversely to the paper making machine. To
the lath d is imparted a shaking movement causing the paper pulp to pass with
greater facility through the wire-work on its way from to y, with the object
of effecting an extremely intimate felting.
It is expedient to provide the lath or board d on its under side at d¹ with
an india-rubber covering in order that the paper pulp shall not pass between

page_text: the endless apron a and the said lath. For enabling the wire work to be carried
away uniformly with the endless apron I provide a roller k which is preferably
forced by means of levers against the front roller ƒ for the endless apron by
the rollers k and the wire work is fed in a suitable manner. In the arrangement
illustrated in Figure 2 the wire work e leaving the roller 6 placed above the
machine is conducted below the pulp-strainer by means of the guide rollers n
and o and then over the plate e to the endless apron a above which the said
plate is held by the lath m.
The wire work drawn with the paper-pulp over the aforesaid plate cannot, on
leaving the latter immediately bear upon the endless apron, so that the paper
pulp on its way from toy will partly pass through the meshes of the wire work
in the above described manner and become felted with the same. The thickness.
of the layer of paper pulp then lying below the wire work c upon the endless
apron a depends upon the thickness of the lath m arranged above the front
roller.
My improved method is adapted for making asbestos pasteboard and asbestos
paper used for decorative purposes and as roofing material, furthermore for
making packing-board and millboard possessing considerable strength.
Having now particularly described and, ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
First. The method of manufacturing paper and pasteboard having wire work or
the like in its interior, which consists in introducing the wire work into the paper
pulp in a paper-making machine directly during the passage of the said pulp to
the endless apron a, for the purpose of enabling the pulp to partially penetrate the
meshes of the wire work on its way from a toy and become united or felted with
the same.
Second. For carrying out the method characterized in the first claiming clause by
means of a paper making machine of the kind indicated in Figure 1, the arrange-
ment of the lath or roller & in front of the outflow plate e in such a manner that the
wire-work c is kept raised between x and y from the metallic apron, for the purpose
of enabling the paper-pulp to partly pass through the said wire work.
Third. In the arrangement specified in the second claiming clause a shaking
mechanism h h for the purpose of facilitating the passage of the paper pulp through
the wire-work from a to y substantially as described with reference to Figure 3.
Fourth. The method characterized in the first claiming clause carried out in
such a manner that the wire work is conducted over the plate e, the distance from a
to y depending upon the thickness of the lath m, substantially as described with
reference to Figure 2.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.