Improvements in the Manufacture and Production of Blotting Paper or like Absorbent Paper and Apparatus to be employed therein.
Year: 1892

page_text: Date of Application, 3rd Sept., 1892
Complete Specification Left. 5th June, 1893-Accepted, 8th July, 1893
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture and Production of Blotting
Paper or like Absorbent Paper and Apparatus to be employed
therein.
We JAMES CRAIG of Moffat Paper Mills, Airdrie, North Britain, Paper
Manufacturer and GILBERT JOHNSON WILDRIDGE of the same place, Paper
Maker, do hereby declare the nature of our invention to be as follows:-
This invention has for its object to produce blotting or like absorbent paper of
better quality than that manufactured in the way hitherto practised. According
to this invention the rags or paper making materials employed, after they are
boiled, are subjected to the action of steam so that the fibres become softened.
This treatment is continued for a sufficient time to attain the required result
usually from two or fourteen days according to the nature of the rage or materials
being treated. This treatment can be conveniently effected by placing the boiled
rags or materials upon perforated or reticulated plates or supports under which
there are jets for the admission of steam which plays up through the plates or
supports and the rags or materials supported thereon. The steam jets may play
down and through the rags also or in any convenient direction or directions.
After this treatment the rags or materials can be treated in a breaker or beater
in the usual way but instead of cutting the rags or materials very finely the fibres
are left long and instead of running them onto a "Fourdrainier" wire they are
put into separate vats each containing a revolving cylinder covered with wire cloth.
A vacuum is created in the cylinders which causes the pulp in the vats to adhere
to the periphery of the cylinders from which it is taken by a travelling belt
or belts and the separate layers of pulp thus formed are pressed together the
pulp being caused to flow into the respective vats in such a way that the fibres
of the layers are crossed which gives a product of considerable strength and
absorbent power and by using these cylinders instead of a "Fourdrainier" wire
paper can be made, duplex, triplex or in any desired number of layers having a
specially absorbent centre and the two outside or other of the layers or linings or
one of them can be made stronger than the other or others to better resist wear
and tear and the two sides may be made of different colours.
Dated this 3rd day of September 1892.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in the Manufacture and Production of Blotting
Paper or like Absorbent Paper and Apparatus to be employed
therein.
We, JAMES CRAIG of Moffat Paper Mills, Airdrie, North Britain Paper
Manufacturer and GILBERT JOHNSON WILDRIDGE of the same place Paper
Maker 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 :-
This invention has for its object to produce blotting or like absorbent paper of
better quality than that manufactured in the way hitherto practised. According
to this invention the rags or paper making materials employed after they are
boiled are subjected to the action of steam, so that the fibres become softened.

page_text: This treatment is continued for a sufficient time to attain the required result
usually from two to fourteen days according to the nature of the rags or materials
being treated. This treatment can be conveniently effected by placing the boiled
rags or materials upon perforated or reticulated plates or supports under which
there are jets for the admission of steam which plays upon the rags or materials
supported on the said plates or supports. A suitable apparatus for this purpose is
shewn in Figure 1 of the accompanying drawings A shewing part of one of the
perforated or reticulated plates or supports and B a steam pipe leading from a
steam generator to perforated steam pipes B2 so as to supply jets of steam to act
upon the rags or materials supported by the plates or supports which are above
the said steam pipes. The steam jets may play down and through the rags instead
of or in addition to playing upwards, or they may play in any convenient direction
or directions. The plates may be supported in any suitable way for instance by
bricks as shewn at a. There may be any suitable number of plates with steam
pipes between them or under or over any required number of them.
D are
After this treatment the rags or materials can be treated in a breaker or beater
in the usual way but instead of cutting the rags or materials very finely the fibres
are left long and instead of running them onto a "Fourdrainier" wire they are
put into separate vats each containing a revolving cylinder covered with wire cloth.
One of such vats is shown in Figures and 3 in sections at right angles to each
other where C is the revolving cylinder covered with wire cloth c.
pipes or passages leading to an air exhausting device by which a vacuum is
created in the cylinders and this with the pressure of the water behind causes the
pulp in the vats to adhere to the periphery of the cylinders and such a layer is
taken by a travelling belt (shewn at E) and kept in contact by the rollers e from
two or more such vats and cylinders. The layers received from the respective
cylinders are pressed one on top of the other or others and by using these cylinders
instead of a "Fourdrainier" wire, paper can be made duplex, triplex or in any
desired number of layers which may be of any desired character respectively so
as to produce for instance a paper having a specially absorbent centre with two
outside or other of the layers or "linings" or one of them stronger than the other
or others to better resist wear and tear and the two sides may be made of different
colours and it will be evident that if desired the fibres, of the several layers can be
crossed or in different directions to each other.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. The manufacture of blotting paper or like absorbent paper by treating the
rags or the like with steam and then after beating obtaining the fibres in layers
superposed and combined substantially as described.
2. For the manufacture of blotting paper or like absorbent paper vats containing
rotating reticulated or perforated cylinders and means for creating a suction therein
so as to draw the fibres on to the periphery and means for conveying the fibres in
layers for combination substantially as described.
3. As a new article of manufacture blotting paper or like absorbent paper made
from different layers of pulp combined substantially as hereinbefore described.
Dated this 5th day of June 1893.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.