Year: 1886

page_text: We JAMES THOMAS MCDOUGALL and JOHN MODOUGALL both of 10 Mark Lane
in the City of London and of Port Street, Manchester, Manufacturing Chemists, do
hereby declare the nature of this Invention to be as follows:-
Our Invention has for its object to so treat pulp produced from wood or other
fibrous materials that it is reduced to a form or condition much, more convenient
for handling, transport, storage, or subsequent treatment, and the ordinary treatment
upon wire web to bring it into the form of sheets may be dispensed with if so
desired.
In damp pulp as usually sold there is a quantity of moisture usually amounting
to about 60 per cent of the mass, but by the treatinent according to our Invention
we are enabled to lessen the per centage of moisture to twenty or thirty per cent
or thereabouts.
According to our Invention we first introduce the pulp to be treated into bags
or envelopes, the introduction being effected by preference under any suitable
pressure so that the pulp is caused to settle in these bags or envelopes and a
portion of the moisture at the same time exudes through the bag or envelope. The
said pulp is then taken to a hydraulic press preferably resembling such as are used
in pressing oil from seeds and a great pressure is applied so that a large proportion
of the remaining moisture is expelled and the pulp reduced to the form of cakes
or comparatively small pieces or slabs convenient for handling, transit, storage, or
subsequent treatment and presenting the advantage of economy, in that the
amount of moisture in the pulp thus treated is very much reduced as compared to
pulp treated in the ordinary way. If desired, the pulp before being pressed need
not be passed into bags or envelopes but in that case it may if desired have part of
the moisture extracted before pressing, for example, by passing it through a
filter-press or hydro-extractor or by analogous treatment. The pulp with this
reduced amount of moisture in it can, by submitting it to a drying process, be
much more readily reduced to the state of "dried-pulp" than can the pulp treated
in the ordinary way.
.

page_text: Wood or other Fibrous Materials.
We JAMES THOMAS MCDOUGALL and JOHN MODOUGALL both of 10 Mark Lane
in the City of London and of Port Street Manchester Manufacturing Chemists,
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:
Our Invention has for its object to so treat pulp produced from wood or other
fibrous materials that it is reduced to a form or condition much more convenient
than hitherto for handling transport storage or subsequent treatment and the
ordinary treatment upon wire-web to bring it into the form of sheets may be
dispensed with if so desired.
In damp pulp as usually sold there is a quantity of moisture usually amounting
to about 60 per cent of the mass, but by the treatment according to our Invention
we are enabled to very materially lessen the per centage of moisture to say twenty
or thirty per cent or thereabouts. According to our Invention we first introduce
the pulp to be treated into bags or envelopes the introduction being effected by
preference under any suitable pressure for example by pressure of a column of the
pulp itself as it flows from a vessel above into the bags or receptacles so that the
pulp is caused to settle in these bags or envelopes and a portion of the moisture at
the same time exudes through the bag or envelope. The said pulp is then taken
to a hydraulic press such as is used in pressing oil from seeds or a press of that class
and so great a pressure is applied that a large proportion of the remaining moisture
is expelled and the pulp is reduced to the form of cakes or comparatively small
pieces or slabs convenient for handling, transit, storage, or subsequent treatment, and
presenting the advantage of economy, in that the amount of moisture in the pulp
thus treated is very much reduced as compared to pulp treated in the ordinary
way. The pulp before being placed in the press need not be passed into bags
or envelopes, but in that case it may have part of the moisture extracted before
pressing, for example by passing it through a filter press or hydro-extractor or by
analogous treatment it being afterwards pressed as described. The pulp with this
reduced amount of moisture in it can by submitting it to a drying process be much
more readily reduced to the state of "dried pulp" than can the pulp treated in the
ordinary way. Where the damp pulp has been brought into the sheet form by
passing it over a wire web it may also be treated to remove moisture according to
our Invention.
Having now particularly described and ascertained the nature of our Inven-
tion and in what manner the same is to be performed we declare that what
we claim is :-
1st. The extraction of moisture from pulp by passing it into bags or envelopes
so that part of the moisture exudes therethrough and then submitting it to heavy

page_text: pressure in a press such as is hereinbefore indicated and in such manner as to
express moisture as herein mentioned.
2nd. The extraction of moisture from pulp by first treating it in a filter press or
hydro-extractor or the like to remove part of the moisture and then submitting it
to heavy pressure in a press such as is hereinbefore indicated and in such manner
as to express moisture as herein mentioned.
3rd. Extracting moisture from pulp by submitting it to heavy pressure in
a press such as is hereinbefore indicated so as to remove moisture as herein
mentioned.