An Improvement in the Manufacture of Pulp for Paper-making and other purposes.
Year: 1891

page_text: Date of Application, 19th Jan., 1891
Complete Specification Left, 19th Oct., 1891-Accepted, 21st Nov., 1891
PROVISIONAL SPECIFICATION.
An Improvement in the Manufacture of Pulp for Paper-making and
other purposes.
I, ROBERT NORMAN REDMAYNE of 26 Grey Street in the City and County
of Newcastle-on-Tyne, Chemical Manufacturer and Merchant do hereby declare
the nature of this invention to be as follows:-
This invention refers to an improvement in the manufacture of pulp for paper-
making and other purposes.
Hitherto in this branch of manufacture it has been customary to discharge the
contents of the pulp boiler into a blow-off pit situated below the boiler by which
arrangement the pulp has to be loaded up and elevated or transferred to the
requisite level so as to be ready for further treatment in its course of manufacture.
Moreover the effect of allowing the pulp to be thus expelled from the pulp boiler
is to more or less solidify and felt it at a stage in its manufacture when such treat-
ment is specially objectionable.
An increased cost of manufacture producing an inferior article is the result of
this treatment but according to my invention I propose to utilise the steam in the
pulp boiler to discharge the pulp to the requisite level for treatment in such a
manner that I may not only greatly reduce the cost of manufacture but at the same
time produce a superior article or product.
To effect my purpose I may use a pulp boiler having preferably a cylindrical
form for a portion of its length the discharge end being tapered off or cone-
shaped and terminating in a flange. To the latter a casing containing a cock
may be attached the casing terminating with a flange for attachment when
required to the flange of a gland piece or the equivalent thereof which works
or is situate in a recess in the end of a pipe which may then be carried away
to discharge at the requisite level into the pulp chest. The pulp boiler is thus
allowed to revolve the requisite length of time in the ordinary way but as soon
as the pulp is sufficiently treated therein the flange on the end of its coned end
is brought opposite to the gland piece. The latter is then connected by bolts
or studs or other simple appliance to the base of the cock casing and screwed
up tightly thereto so as to form a continuous passage between the pulp boiler and
the pipe leading to the pulp chest aforesaid or its equivalent.
The cock being opened the pressure of the steam forces the pulp out of the.
boiler through the cock and gland piece and up through the pipe leading to the
pulp chest. The gland piece may be lead lined and slightly tapered inside.
As soon as the boiler is empty the gland is disconnected from the cock casing
and pushed back into its recess the cock is then shut and the boiler is ready for
re-charging.
The gland serves to afford an easy method of connecting or disconnecting the
boiler to or from the pipe leading to the pulp chest.
The above process entirely avoids the solidifying or felting of the pulp during its.
expulsion from the boiler while the labour hitherto attaching to the lifting and
removal of the pulp is performed by the waste steam as above described.
Dated this 17th day of January 1891.
A. CRAWHALL CHAPMAN,
3, St. Nicholas' Buildings, Newcastle-on-Tyne,
Patent Agent for Applicant.

page_text: DI MULTIVATION.
An Improvement in the Manufacture of Pulp for Paper-making and
other purposes.
I, ROBERT NORMAN REDMAYNE, of 26 Grey Street in the City and County
of Newcastle-on-Tyne, Chemical Manufacturer and Merchant 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 refers to an improvement in the manufacture of pulp for paper-
making and other purposes.
I introduce my improvement at that stage of the process where the pulp is
discharged from the pulp boiler preparatory to its subsequent treatment and while
I utilise the steam pressure in the pulp boiler to discharge the pulp through a
pulp main to a pulp chest or storage chamber I at the same time employ appliances
whereby the pulp in transit is so improved in quality as to materially reduce the
cost and labour attendant on its subsequent treatment.
I will describe my invention in detail with reference to the accompanying drawings
in which
Figure 1 shows a sectional elevation, Figure 2 an elevation and Figure 3 a
general elevation of such parts of a pulping plant as are necessary for the full
explanation of my invention.
Like letters of reference indicate like parts.
Referring to the drawings, a is a pulp boiler mounted and arranged to revolve on
trunnions at 1, through which steam is allowed to enter the boiler in the ordinary
way.
The boiler is made cone shaped towards its delivery end as shown in the
drawings to facilitate the expulsion of its contents. To the coned or discharge
end of the boiler is connected a casting a¹ to which the cock casing b with cock c
is attached.
f is a tapered sliding pipe or gland-piece fitted and working in a recess in the
end of the pipe or pulp main f¹ which leads up and discharges into a pulp chest or
storage chamber. When the pulp has been sufficiently treated in the boiler the
discharge end thereof is brought and stopped so that the flange b' of the cock
casing shall be exactly opposite the corresponding flange of the gland-piece. The
latter is then pushed up from its socket and bolted to the cock casing flange as
shown in Fig. 1.
The effect of forming the gland-piece with an internal taper f' as shown is to so
obstruct the area of outlet for the pulp issuing under steam pressure from the
boiler as to still further materially reduce the pulp itself and improve its character
for subsequent treatment.
The cock c is controlled by handle at h so that after the boiler has discharged
its contents as above described the cock may be closed, gland-piece f be disconnected
and allowed to slide down into its socket (as shown in Fig. 2) and the boiler can
then be recharged for further treatment of pulp. The gland-piece may be pro-
vided with lugs to facilitate its connection to the cock casing and its taper may be
effected by a tapered lining of lead.
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 :-
1. The combination or arrangement of parts consisting of a pulp boiler having a
cone shaped end controlled by a cock, the cock casing being provided with a
flange so that this flange can be connected to or disconnected from the flange or
the equivalent thereof of a tapered gland-piece arranged and working in the

page_text: socket of a pipe leading to a pulp chest the several parts being arranged and
designed to operate substantially as and for the purposes herein before set forth.
Dated this 15th day of October 1891.
A. CRAWHALL CHAPMAN,
3, St. Nicholas' Buildings, Newcastle-on-Tyne, Patent Agent.