IMPROVEMENTS IN MACHINERY OR APPARATUS FOR THE MANUFACTURE OF PAPER PULP
Year: 1868

page_text: LETTERS PATENT to John Henry Johnson, of 47, Lincoln's Inn
Fields, in the County of Middlesex, Gentleman, for the Invention
of "IMPROVEMENTS IN MACHINERY OR APPARATUS FOR THE MANUFACTURE OF
PAPER PULP." A communication from abroad by the Incorporated
Company "Debré and Grange," and Paul Pasgnier, of Paris, in the
Empire of France.
-
Sealed the 15th December 1868, and dated the 3rd July 1868.
PROVISIONAL SPECIFICATION left by the said John Henry Johnson
at the Office of the Commissioners of Patents, with his Petition, on
the 3rd July 1868.
I, JOHN HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the County
of Middlesex, Gentleman, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN MACHINERY OR APPARATUS FOR THE MANU-
FACTURE OF PAPER PULP," a communication to me from abroad by the
Incorporated Company "Debré and Grange," and Paul Pasgnier, of
Paris, in the Empire of France, to be as follows:-
This Invention relates to the trituration of paper pulp, and has for its.
object the effecting a saving in the motive power required to drive the
machine or apparatus employed for that purpose.

page_text: According to this Invention it is proposed to apply in the vat con-
taining the pulp, and in proximity to the cylinder ordinarily employed,
an additional apparatus to feed the pulp between the teeth or blades of
the cylinder and those in the block in lieu of causing the cylinder itself
to agitate, and thus effect the supply of the pulp as well as operate its
trituration as in the ordinary manner. The feed apparatus may consist of
a drum provided with pallets, or a pump, or other apparatus suitable for
the purpose intended. The cylinder being elevated above the pulp is not
required to overcome the resistance which it is ordinarily subjected,
and as the power expended in feeding is but small a considerable saving
in motive power is effected.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Henry Johnson in the Great Seal Patent
Office on the 1st January 1869.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the County of Middle-
sex, Gentleman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Third day of July, in the year of
our Lord One thousand eight hundred and sixty-eight, in the thirty-
second year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said John Henry Johnson, Her special license
that I, the said John Henry Johnson, my executors, administrators, and
assigns, or such others as I, the said John Henry Johnson, my executors,
administrators, or 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, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
MACHINERY OR APPARATUS FOR THE MANUFACTURE OF PAPER PULP," a com-
munication from abroad by "the Incorporated Company "Debre and
Grange," and Paul Pasgnier, of Paris, in the Empire of France, upon
the condition (amongst others) that I, the said John Henry Johnson,
my executors or administrators, by an instrument in writing under my

page_text: hand and seal, 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 Seal Patent Office
within six calendar months next and immediately after the date of the
said Letters Patent.
NOW KNOW YE, that I, the said John Henry Johnson, do hereby
declare the nature of the said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement, reference being had to the accompanying
Drawings, and to the figures marked thereon, that is to say :-
The said Invention relates to the trituration of paper pulp, and has for
its object the effecting a saving in the motive power required to drive
the machinery or apparatus employed for that purpose.
According to this Invention it is proposed to apply in the vat con-
taining the pulp, and in proximity to the cylinder ordinarily employed,
an additional apparatus to feed the pulp between the teeth or blades of
the cylinder and those of the block, in lieu of causing the cylinder itself
to agitate, and thus effect the supply of the pulp as well as effect its
trituration as in the ordinary manner. The feed apparatus may consist of
a drum provided with pallets, or a pump, or other apparatus suitable for
the purpose intended. The cylinder being clevated above the pulp is not
required to overcome the resistance to which it is ordinarily subjected,
and as the power expended in feeding is but small a considerable saving
in motive power is effected.
And in order that the said Invention may be fully understood I shall
now proceed more particularly to describe the same, and for that purpose
shall refer to the several Figures on the annexed Sheet of Drawings.
Figure 1 of the accompanying Drawing is a section of an ordinary
cylinder vat, and Figure 2 is a section of a modified arrangement which
sufficiently illustrates this Invention. The cylinder in the improved
arrangement is shewn raised completely out of the pulp, by which the
resistance of the latter to its motion is obviated whatever may be the
speed at which it revolves. It is fed by a special pulp mover arranged
so as to work at a very moderate speed suitable to effect the sufficiently
rapid renewal of the pulp submitted to the triturating action of the
cylinder. Thus combined the power absorbed in driving the apparatus
is considerably reduced. By the use of this arrangement therefore a

page_text: saving in motive power will be effected equal to the difference between
the amount of power required to actuate the pulp mover in question,
which is very small, and that which the cylinder absorbes when it is
immersed in the pulp, which is considerable.
Having now described and particularly ascertained the nature of the
said Invention, and the manner in which the same is or may be used or
carried into effect, I would observe in conclusion that what I consider
to be novel and original and therefore claim as the Invention secured
to me by the herein-before in part recited Letters Patent is,―
First. The so constructing and arranging machinery or apparatus
employed in triturating or grinding pulp as that the grinding cylinder
shall not be required to assist the supply or passage of the pulp in
addition to grinding or triturating the same, as and for the purpose
herein-before described.
Second. The combination with a grinding cylinder, disposed as herein
set forth, of any suitable contrivance for putting the pulp in motion and
causing it to pass continuously under the cylinder.
In witness whereof, I, the said John Henry Johnson, have to this
my Specification set my hand and seal, the First day of January
One thousand eight hundred and sixty-nine.
J. HENRY JOHNSON. (L.S.)