IMPROVED METHOD OF OR PROCESS FOR TREATING-SPENT HOPS FOR THE MANUFACTURE OF PAPER PULP
Year: 1872

page_text: LETTERS PATENT to Frederick Burnett Houghton, of No. 40, Borough
Road, in the Borough of Southwark, and County of Surrey, for the
Invention of "IMPROVED METHOD OF OR PROCESS FOR TREATING-SPENT
HOPS FOR THE MANUFACTURE OF PAPER PULP."
PROVISIONAL SPECIFICATION left by the said Frederick Burnett
Houghton at the Office of the Commissioners of Patents, with his
Petition, on the 19th December 1872.
I, FREDERICK BURNETT HOUGHTON, of No. 40, Borough Road, in
the Borough of Southwark, and County of Surrey, do hereby declare the
nature of the said Invention for "IMPROVED METHOD OF OR PROCESS FOR
TREATING SPENT HOPS FOR THE MANUFACTURE OF PAPER PULP," to be as
follows:-
Twantion wolates to a special method of or process for the treat

page_text: In the manufacture of paper pulp from ligneous fibres it is essential
that a strong caustic or alkaline solution be employed, and also a boiling
under excessive pressure in order to eliminate the resins, gums, and
other bodies that are contained in the pores, and to reduce the fibres to a
soft and semi-pulpy mass.
According to a Patent granted to me on the 17th day of February
in the year 1857, numbered 467, I describe in the Specification
filed in pursuance thereof that the strength of the alkaline solution
varied from 6 to 7° or more (but not less than 4°) of Beaumé for the
treatment of woody fibres, and that the pressure for the boiling process
varied from 180 to 190 lbs. on the square inch, and these were essential
for the treatment or reduction of raw fibres, such as chips, stalks, or
cuttings. Now according to my present Invention I treat leaves of hops
that have been used for the making of beers or ales by brewers; these I
boil in a close vessel.at a pressure of not less than 90 lbs., but preferably
varying from 175 to 180 lbs. on the square inch, the alkaline solution
being first tested to a strength of from 22° to 4° Beaumé, but never
exceeding 4°, whereby the leaves become sufficiently reduced and form a
serviceable pulp for the manufacture of paper.
Hitherto spent hops have been treated as waste, and have been con-
signed to the dung heap to be used as manure, but by my Invention I
utilize that refuse and render it of great commercial value.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Frederick Burnett Houghton in the Great Seal
Patent Office on the 19th June 1873.
TO ALL' TO WHOM THESE PRESENTS SHALL COME, I, FREDERICK
BURNETT HOUGHTON, of No. 40; Borough Road, in the Borough of
Southwark, and County of Surrey, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Nineteenth day of December, in the
year of our Lord One thousand eight hundred and seventy-two, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Frederick Burnett Houghton, Her
special licence that I, the said Frederick Burnett Houghton, my executors,

page_text: administrators, and assigns, or such others as I, the said Fredcrick
Burnett Houghton, my executors, administrators, and assigns, should at
any time agree with, and no others, from time to time and at all times
thereafter during the term therein expressed, should and lawfully might
make, use, excrcise, and vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Invention
for "IMPROVED METHOD OF OR PROCESS FOR TREATING SPENT HOPS FOR THE
MANUFACTURE OF PAPER PULP," upon the condition (amongst others) that
I, the said Frederick Burnett Houghton, my executors or administrators,
by an instrument in writing under my, or their, or one of their hands
and scals, should particularly describe and ascertain the nature of the
said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Scal Patent Office within
six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said Frederick Burnett Houghton, do
hereby declare the nature of my said Invention, and in what manner
the same is to be performed, to be particularly described and ascertained
in and by the following statement thereof, that is to say :-
This Invention relates to a special method of or process for the treat-
ment of spent hops for the manufacture of a pulp suitable for paper.
In the manufacture of paper pulp from ligneous fibres it is essential
that a strong caustic or alkaline solution be employed, and also a boiling
under excessive pressure in order to eliminate the resins, gums, and
other bodies that are contained in the pores, and to reduce the fibres to
a soft and semi-pulpy mass.
According to a Patent granted to me on the 17th day of February in
the year 1857, numbered 467, I describe in the Specification filed in
pursuance thereof that the strength of the alkaline solution varied
from 6 to 7° or more, but not less than 4° of Beaumé, for the treat-
ment of woody fibres, and that the pressure for the boiling process varied
from 180 to 190 lbs. on the square inch, and these were essential for
the treatment or reduction of raw fibres, such as chips, stalks, or cuttings.
Now according to my present Invention I treat leaves of bops that have
been used for the making of beers or ales by brewers; thesc I boil in a
close vessel at a pressure of not less than 90 lbs., but preferably varying
from 175 to 180 lbs. on the square inch, the alkaline solution being first

page_text: tested to a strength of from 2½° to 4º, but never exceeding 4° Beaume,
whereby the leaves become sufficiently reduced and form a serviceable
pulp for the manufacture of paper.
Hitherto spent hops have been treated as waste, and have been con-
signed to the dung heap to be used as manure, but by my Invention I
utilize that refuse and render it of great commercial value.
Having now described the nature of my said Invention, and in what
manner the same is to be performed, I declare that I claim, the special
method of or process for treating spent hops, as and for the purpose set
forth.
In witness whereof, I, the said Frederick Burnett Houghton, have
hereunto set my hand and seal, this Eighteenth day of June,