IMPROVEMENTS IN THE MANUFACTURE OF PAPER PULP FROM MARINE AND OTHER PLANTS
Year: 1882

page_text: LETTERS PATENT to William Robert Lake, of the firm of Haseltine, Lake
& Co., Patent Agents, Southampton Buildings, London, for an Invention of
"IMPROVEMENTS IN THE MANUFACTURE OF PAPER PULP FROM MARINE AND
OTHER PLANTS Communicated to him from abroad by Edouard Vincent
Jules Laurent Gorges, of Paris, France, Chemist
"
PROVISIONAL SPECIFICATION left by the said William Robert Lake at the
Office of the Commissioners of Patents on the 22nd September 1882.
WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake and Co., Patent Agents,
Southampton Buildings, London, "IMPROVEMENTS IN THE MANUFACTURE OF
[A communication to him from
abroad by Edouard Vincent Jules Laurent Gorges, of Paris, France, Chemist]
PAPER PULP FROM MARINE AND OTHER PLANTS
"
This Invention relates to the manufacture of paper and pasteboard pulp from
marine and herbaceous plants, seaweed, aquatic plants, branches and leaves of
trees, ferns, heath, broom, rushes, straw, shells of peas and beans, mosses, couch-
grass, and other plants.
The said Invention comprises the following succession of operations, that is to
sayThe plants newly cut, or the seaweed recently gathered, are pressed or sub-
jected to an energetic rolling which crushes the ligneous fibres in a uniform and
regular manner. On falling from the rollers they are received upon an endless
metallic apron, compressed under a cylinder or roller of india-rubber, and then
conducted to a mill or apparatus in which a drum, covered with projecting points,
separates the fibres and divides the material which comes out in the form of tow..
The material thus divided is subjected to a chemical treatment, that is to say,
for three or four hours a caustic lye is caused to act upon them, preferably in a
digester heated to two or three atinospheres. This lye is, by preference, prepared
with marine or herbaceous plants which are calcined; the alkaline lye of soda and
potash which is thus obtained is rendered caustic by the addition of lime-milk.
After the steeping in lye, the tow is subjected to a strong pressure to eliminate
the soda; it is carefully washed and partly bleached in a primary bath of lime-
water and soap. The bleaching is completed in a second bath of chloride of lime
and lime water into which it is plunged after the first washing.
The bleached material is dried in a hydro-extractor, and is then ready to be used
as paper or pasteboard pulp.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Robert Lake in the Great Seal Patent Office on the
21st March 1883.
WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake & Co, Patent Agents,
Southampton Buildings, London, "IMPROVEMENTS IN THE MANUFACTURE OF
A communication to me from
PAPER PULP FROM MARINE AND OTHER PLANTS "
abroad by Edouard Vincent Jules Laurent Gorges, of Paris, France, Chemist
This invention relates to the manufacture of paper and pasteboard pulp from
marine and herbaceous plants, seaweed, aquatic plants, branches and leaves of
trees, ferns, heath, broom, rushes, straw, shells of peas and beans, mosses, couch-
grass, and other plants.
The said invention comprises the following succession of operations, that is to
sayThe plants newly cut, or the seaweed recently gathered, are pressed or
subjected to an energetic rolling which crushes the ligneous fibres in a uniform
and regular manner. On falling from the rollers they are received upon an
endless metallic apron, compressed under a cylinder or roller of india-rubber, and
then conducted to a mill or apparatus in which a drum covered with projecting
points separates the fibres and divides the material, which comes out in the form
of tow.
The material thus divided is subjected to a chemical treatment, that is to say,
for three or four hours a caustic lye is caused to act upon it, preferably in a
digester heated to two or three atmospheres. This lye is, by preference, prepared
with marine and herbaceous plants which are calcined; the alkaline lye of soda
and potash which is thus obtained is rendered caustic by the addition of
lime-milk.
After the steeping in lye, the tow is subjected to a strong pressure to eliminate
the soda; it is carefully washed and partly bleached in a primary bath of lime-
water and soap. The bleaching is completed in a second bath of chloride of lime
and lime-water into which it is plunged after the first washing.
The bleached material is dried in a suitable apparatus and is then ready to be a
used as paper or pasteboard pulp.
Having thus fully described the said invention as communicated to me by my
foreign correspondent, and the manner of performing the same, I wish it understood
that I claim :—
The manufacture of paper or pasteboard pulp from marine and other plants, by 3
the succession of operations above described, consisting essentially in the rolling, the
separation of the fibres, the steeping in lye, the compressing, washing, bleaching and
drying, all substantially as set forth.
In witness whereof I the said William Robert Lake have hereunto set my
hand and seal this twenty first day of March in the year of our Lord one 4
thousand eight hundred and eighty three
WM. ROBT. LAKE (LS.)