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

page_text: Date of Application, 4th Mar., 1891
Complete Specification Left, 2nd Dec., 1891-Accepted, 2nd Jan., 1892
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 and consists in the construction and application of a
reducing medium whereby the fibre of the pulp may be very greatly improved for
subsequent treatment while at the same time the cost and labour of manufacture is
materially reduced and facilitated.
To effect my purpose I make use of a short length of reducing pipe having
internal projections or cutting surfaces arranged around its inner surface and I
prefer to place this pipe in its working position at a suitable point on the column of
piping which connects the pulp boiler with the pulp chest when the boiler is
discharging thereinto.
Cross knives might similarly be employed to reduce the pulp in its transit under
steam pressure from the pulp boiler to the pulp chest or other cutting media or
combs against which the steam and pulp impinges might be employed without
departing from the principle of the invention herein foreshadowed.
In either case the steam is used to eject the pulp direct through a pulp main
from the boiler or boilers to the pulp chest situate at its requisite level and by the
introduction into the pulp main of the cutting media aforesaid the pulp in transit is
very materially improved for subsequent treatment in its course of manufacture.
The above improvement may be used as described or in combination with a pulp
main constructed and arranged as described in my application for Letters Patent
No. 927º¹
D: 91 1 of Mounk 1801
A. CRAWHALL CHAPMAN,
3, St. Nicholas Buildings, Newcastle-on-Tyne,
Patent Agent for Applicant.
COMPLETE 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 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 and consists in the construction and application of a
reducing medium whereby the fibre of the pulp may be very greatly improved for
subsequent treatment while at the same time the cost and labour of manufacture is
materially reduced and facilitated.
To effect my purpose I make use of a short length of reducing pipe having
internal projections or cutting surfaces arranged around its inner surface and
prefer to place this pipe in its working position at a suitable point on the column of
piping which connects the pulp, boiler with the pulp chest when the boiler is
discharging thereinto.

page_text: The above improvement may be used as described or in combination with a pulp
main constructed and arranged as described in my application for Letters Patent
No. 92791.
Figures 1, 2, and 3 of the accompanying drawings are illustrative of my invention
and show respectively a sectional elevation, an end view and a general view more
particularly hereinafter referred to.
Referring to these drawings a shows a length of reducing pipe having internal
projections or cutting surfaces a arranged around its inner surface as shown.
In Fig. 3, represents a pulp main designed to connect a pulp boiler with the
pulp chest and I prefer to place the reducing pipe aforesaid in its working
position at or about the point indicated in this figure.
The steam in the pulp boiler is used to eject the pulp therefrom direct through
main to chest 2 but by the introduction of the cutting or reducing media
aforesaid the pulp in transit is very materially improved for subsequent treatment
in its course of manufacture.
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
In the manufacture of pulp for paper-making and other purposes, the use of a
reducing pipe having internal projections or cutting surfaces arranged around its
inner surface and adapted to reduce the pulp fibre substantially in the manner
herein set forth.
Dated this 30th day of November 1891
A. CRAWHALL CHAPMAN,
3, St. Nicholas Buildings, Newcastle-on-Tyne, Patent Agent.