Year: 1899

page_text: A communication from abroad from HOFFNUNGSTHALER PAPIERFABRIK, A. & R.
GELDMACHER, of Hoffnungsthal, near Felderhoferbrücke, Government Dis-
trict of Cologne, Germany.
I, WILLIAM LLOYD WISE, of 46, Lincoln's Inn Fields, in the County of London,
Consulting Engineer and Chartered Patent Agent, do hereby declare the nature
of this invention to be as follows: -
This invention relates to a method for the manufacture of wool-paper-i.e.,
a paper having a rough surface and a woolly appearance and particularly adapted
for use as wall-paper.
It has hitherto been usual to produce such paper, for example, on a paper
machine provided with two wires or sieves, by making an ordinary web of paper
on the lower wire or sieve and at the same time a second web of paper com-
posed of sized animal wool fibres on the upper sieve or wire and then pressing
the two webs of paper together at a suitable point so that a finished product was
formed that was smooth on the lower side, whilst the upper side, on the con-
trary, was rough and had a woolly appearance.
Now the method of this invention differs from that hereinbefore mentioned
and also from other hitherto known methods both in being much simpler and
in the use of different material.
According to the new method the wool-paper is produced at one and the same
operation on an ordinary paper machine with a single wire or sieve by mixing
with the raw material for the paper (cellulose, etc.,)-hereinafter called the
paper-pulpa corresponding quantity of coarser vegetable fibre particularly
ground wood fibres. This pulp is then run upon the paper wire or sieve in the
known manner for the production of the paper.
The wool-paper produced by the present method is characterized by being
produced much more cheaply than similar wool-paper, hitherto known and
further by the rough and woolly appearance of its surface, whereby a combined
effect is produced that has not hitherto been attained.
In the production of this new wool-paper, which is therefore composed of a
mixture of fine fibres (cellulose) with coarser fibres (ground wood fibres), the
coarser fibres are deposited in all directions on and beside one another, so that
the finer fibres (cellulose etc.,) are prevented from forming a close thin web of
paperi.e., there are formed on the surface of this new wool-paper, depressions
and small cavities, and further, the ends of the upper cellulose fibres lie free
or stand out so that a rough surface and a woolly appearance are produced.
The coarser fibres may be dyed with fast or not fast colours as required. If
they are coloured, for instance, with fast colours of a dark shade, and are mixed
with a light-shade paper-pulp, a mottled or variegated product is obtained, as
the darker wood fibres are distinctly set off by or are in contrast with the lighter

page_text: coloured pulp. If wood fibres dyed with a colour that is not fast be used, then
the dye is partially transferred to. the paper-pulp so that a coloured product is
obtained in which the darker tones of the coarser vegetable fibres are set off
by or in contrast with the lighter paper-pulp fibres. The paper-pulp fibres
may also be dyed as required before being mixed with the coarser vegetable
fibres.
T
14
J
1900
1 .
Improvements in the Manufacture of Paper.
A communication from abroad from HOFFNUNGSTHALER PAPIERFABRIK, A. & R.
GELDMACHER, of Hoffnungsthal, near Felderhoferbrücke, Government Dis-
trict of Cologne, Germany.
1, WILLIAM LLOYD WISE, of 46, Lincoln's Inn Fields, in the County of London,
Consulting Engineer and Chartered Patent Agent, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement:-
This invention relates to a method for the manufacture of wool-paper-i.e.,
a paper having a rough surface and a woolly appearance and particularly adapted
for use as wall-paper.
..
"
66
66
66
"
It has hitherto been usual to produce such paper, for example, on a paper-
machine provided with two wires or wire-cloths (hereinafter called wires"),
by making an ordinary web of paper on the lower wire" and at the same time a
second web of paper composed of sized animal-wool fibres on the upper wires
and then pressing the two webs of paper together at a suitable point so that a
finished product was formed that was smooth on the lower side, whilst the upper
side, on the contrary, was rough and had a woolly appearance.
Now the method of this invention differs from that hereinbefore mentioned
and also from other hitherto known methods both in being much simpler and
in the use of different material.
According to the new method, the wool-paper is produced at one and the
same operation, on an ordinary paper machine, and with a single "wire," by mix-
ing with the raw material (sulphite and white linen pulp) for the paper (hereinafter
called the paper-pulp) a suitable quantity (about 30% to 40%) of coarser
vegetable fibres particularly ground wood fibres. This pulp is then run upon
the paper-machine "wire" in the known manner for the production of the paper.
The wool-paper produced by the present method is characterized by being
produced much more cheaply than similar wool-paper hitherto known, and
further by the rough and woolly appearance of its surface, whereby a combined
effect is produced that has not hitherto been attained.
In the production of this new wool-paper, which is therefore composed of a
mixture of fine fibres (sulphite and white linen pulp) with coarser fibres (vege-
table fibres, as ground wood fibres), the coarser fibres are deposited in all direc-
tions on and beside one another, so that the finer fibres are prevented from forming
a close thin web of paper-i.e., there are formed on the surface of this new
wool-paper, depressions and small cavities, and further, the ends of the upper

page_text: cellulose fibres lie free or stand out so that a rough surface and a woolly appearance
are produced.
29
The coarser fibres may be dyed with fast or with loose (not fast) colours as
required. If they are coloured, for instance, with fast colours of a dark shade,
and are mixed with a light-shade paper-pulp a mottled or variegated product
is obtained, as the darker wood fibres. are distinctly set off by or are in con-
trast with the lighter coloured pulp. If wood fibres dyed with a loose colour
be used, then the dye is partially transferred to the paper-pulp so that a coloured
product is obtained in which the darker tones of the coarser vegetable fibres
are set off by or in contrast with the lighter paper-pulp fibres. The paper-pulp
fibres may also be dyed as required before being mixed with the coarser vege-
table fibres.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
1. For producing paper having a rough surface and a woolly appearance and
particularly adapted for use as wall-paper, mixing coarser vegetable fibres
particularly wood-fibres with paper-pulp composed of finer fibres, and working
up the mixture so obtained, in a known manner to form paper.
2. The manufacture of paper having a rough surface and a woolly appearance,
according to the preceding claim, in which the coarser vegetable fibres, to be
added to the pulp composed of finer fibres, are previously dyed either with fast
or with loose colours, in the latter case a portion of the dye being given up to the
undyed or otherwise coloured paper-pulp composed of finer fibres.
3. The manufacture of wool paper from vegetable fibres as hereinbefore
described, whether the vegetable fibres be dyed with fast or loose colours or not.
Dated this 28th day of August 1899
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C.,
Chartered Patent Agent.
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C.,
Chartered Patent Agent.