IMPROVEMENTS IN THE MANUFACTURE OF BOARDS OR SHEETS WHEN WOOD SAWDUST IS USED
Year: 1858

page_text: LETTERS PATENT to Henry Thomas Yates, of Hounds Gate, Nottingham,
for the Invention of "IMPROVEMENTS IN THE MANUFACTURE OF BOARDS OR
SHEETS WHEN WOOD SAWDUST IS USED."
Sealed the 3rd June 1859, and dated the 4th December 1858.
PROVISIONAL SPECIFICATION left by the said Henry Thomas Yates at
the Office of the Commissioners of Patents, with his Petition, on the
. 4th December 1858.
I, HENRY THOMAS YATES, of Hounds Gate, Nottingham, do hereby declare
the nature of the Invention for "IMPROVEMENTS IN THE MANUFACTURE OF BOARDS
OR SHEETS WHEN WOOD SAWDUST IS USED," to be as follows:-.
This Invention has for its object improvements in the manufacture of boards
or sheets when wood sawdust is used. For these purposes the wood sawdust
is sifted into several degrees of fineness; the finer qualities are used for making.
the thinner sheets or boards. A quantity of resin in the state of powder
is intimately mixed with the sawdust; in some cases, particularly for the
coarser articles, pitch is employed in the state of powder. A-heated metal
plate is used, on which a sheet of paper, or it might be woven fabric, is placed;
then a frame or mould, according to the size and thickness of the intended
sheet or board, is placed on the paper; this mould or frame is filled with the
[Price Sd.]

page_text: composition of wood sawdust and resin or pitch, then when the mould or frame
has been lifted off, another sheet of paper or woven fabric is placed on the
composition, then a hot metal plate; and in this manner numerous layers of
the composition are placed one over the other having hot plates between themi,
and the pile is placed within a powerful press and subjected to pressure till set.
The sheets or boards are then removed, and the covered papers or fabrics
stripped off, then another covering of paper, or in some cases woven fabric is
applied, by glue or other cement, on both sides of each sheet or board of the
composition. When dry these boards or sheets will be suitable to be used in
place of paste and other board for packing and other uses.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Henry Thomas Yates in the Great Seal Patent Office on
the 3rd June 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRY
THOMAS YATES, of Hounds Gate, Nottingham, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fourth day of December, in the year of our Lord
One thousand eight hundred and fifty-eight, in the twenty-second year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Henry Thomas Yates, Her special licence that I, the said Henry
Thomas Yates, my executors, administrators, and assigns, or such others
as 1, the said Henry Thomas Yates, 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, exercise, and vend, within the United Kingdom
of Great Britain and Ireland, the channel Islands, and Isle of Man, an Inven-
tion for "IMPROVEMENTS IN THE MANUFACTURE OF BOARDS OR SHEETS WHEN WOOD
SAWDUST IS USEг," upon the condition (amongst others) that I, the said Henry
Thomas Yates, my executors or administrators, by an instrument in writing
under my, or their, or one of their hands and seals, 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 Henry Thomas Yates, do hereby
declare the nature of the said Invention, and in what manner the same is

page_text: to be performed, to be particularly described and ascertained in and by the
following statement thereof, that is to say:-
This Invention has for its object improvements in the manufacture of boards
or sheets when wood sawdust is used. For these purposes the wood sawdust
is sifted into several degrees of fineness. the finer qualities are used for making
the thinner sheets or boards. A quantity of resin in the state of powder,
generally about one-eighth of the weight thereof, is intimately mixed with the
sawdust. In some cases, particularly for the coarser articles pitch is employed
in the state of powder in like manner to that in which the resin is hereafter
described to be employed. A heated metal plate is used on which a sheet of
paper or it might be woven fabric is placed; then a frame or mould, according
to the size and thickness of the intended sheet or board which is to be pro-
duced according to my Invention, is placed on the paper. This mould or frame
is filled with the composition of wood sawdust. and resin or pitch: then when
the mould or frame has been lifted off, another sheet of paper or woven fabric
is placed on the composition, then a hot metal plate; and in this manner
numerous layers of the composition are placed one over the other, having hot
plates between them, and the pile is placed within a powerful press and sub-
jected to pressure till set. Or, in place of introducing the hot plates before
moulding the materials, the materials may be moulded on the paper separately,
and when a number is being piled into a press the hot plates may be intro-
duced between them. The sheets or boards are then removed, and the papers
or fabrics stripped off; then another covering of paper, or in some cases woven
fabric is applied, by glue or other cement, on both sides of each sheet or board
of the composition. When dry these boards or sheets will be suitable to be
used in place of paste and other board for packing and other uses.
In witness whereof, I, the said Henry Thomas Yates, have hereunto set
my hand and seal, this Second day of June. in the year of our Lord
One thousand eight hundred and fifty-nine.
HENRY THOMAS YATES. (L.S.)