Improved Method of Manufacturing Lumber.
Year: 1899

page_text: Date of Application, 7th Sept., 1899
Complete Specification Left, 1st Jan, 1900-Accepted, 24th Feb., 1900
Improved Method of Manufacturing Lumber.
I, DAVID GILMOUR, of Dundas Street, in the Town of Trenton, in the County
of Hastings, in the Province of Ontario, Canada, Lumber Manufacturer, do
hereby declare the nature of this invention to be as follows:-
My invention relates to the manufacture of finished or high grade clear lumber,
deals and the like, which is designed to take the place of what is now known in
the market as "
good"
""clear" "picks" and "selects" and it consists in a pro-
cess or method of manufacture as hereinafter explained.
The rapid consumption and increasing scarcity of clear high grade lumber are
well known. The demand therefore is so much greater than the demand for the
lower grades that these lower grades continue to be abundant, while the higher
grades grow relatively more scarce and expensive.
My invention is designed to utilize these cheaper grades of material and the
general lumber wastes from the forest or saw log limits, for the base of the
lumber, while the surface of said lumber is composed of the finer and higher
grades, either of the same or of a different kind from the base.
The article of manufacture produced by me in the use of this invention consists
of a surfaced lumber, the body or thicker part of which may be made of a cheaper
or more imperfect kind of material of the lower grades, such as worm eaten or
knotty trees or parts of trees taken from the forest or from the comparatively
waste lumber from the saw-mill, these thicker parts being combined with a sur-
face material of a higher grade either of the same kind or of a different kind
from that of the body or thicker part of the finished lumber, the two parts being
joined by fine tongues or grooves, which interlock and are united by any suitable
glue or cement, preferably water-proof. The parts are united firmly and are
finished so as to be ready for solid piling or for shipment by means of heat and
pressure which at the same time expels the moisture and superfluous glue and
leaves the surface in a solid, compressed, condensed and finished condition and
the whole thoroughly seasoned. The method aforesaid is carried on by any suit-
able machinery such as that diagramatically shown in the accompanying draw-
ings, in which
The figure shows the, various parts of the apparatus in conventional form and
diagramatically.
I describe the process used by me in the practical production of this lumber
giving all the steps both essential and non-essential in connection with the
apparatus as illustrated in the figure. For the surface of the finished lumber
I assume the logs of superior or high grade or of a comparatively expensive kind
of material to be taken as they come from the forest. These are first sawed into
suitable lengths and are subjected to the action of hot water or steam in a suit-
able tank. When thoroughly steamed and softened the logs are transferred to
a peeler B of ordinary construction from which the lumber is cut by the revolution
of the log against a knife in the ordinary manner, thence in a continuous strip

page_text: is taken to a clipper C which cuts it into pieces of suitable dimensions. These
pieces are next passed between pairs of steam heated rolls D where the pieces are
deprived of a greater part of their moisture and partially compressed. Thence
they are passed to a sticker E, in which one face is formed with fine tongues and
grooves preferably rectangular in cross section. From the sticker the pieces are
next immediately passed under a glue brush F which gives them a coating of
glue or cement on the tongued and grooved surface. Next to the said brush is
a table which receives the combined parts consisting of the finer surface material
heretofore referred to and the thicker body portion which has been tongued
and grooved in a similar manner to fit the tongues and grooves of the finer and
thinner part, and which, if desired, may also be coated with the glue or cement.
It will be understood that the grooves both in the thicker or body
portion and in the thinner or surface portion are made longitudinally
of the grain and the surface piece of any multiple thereof made of a
width to suit the width of the body portion is placed upon said body
portion with the tongues and grooves registering with each other. The parts
thus combined are passed between a series of heated pressure rolls--G preferably
of gradually increased heat, where they are subjected to the heat and a high
degree of pressure which combine and weld together the two parts in one piece
which differs as to the quality of the material but is homogeneous practically
in its structure. The heat and pressure of the rolls are sufficient to expel the
remaining moisture and surplus glue, endwise of the grain through the end of
the piece, and to condense the surfacing material while the lumber is held in
place under the rolls and is passing thereunder so that the lumber emerges in a
finished condition and with a specially compressed and finished surface, and
requires no subsequent drying but is ready either for solid piling or for shipping.
In the above explanation I have assumed that the base or thicker part has
been sawed out in the usual manner, grooved and tongued and then combined
with the surface material. But the base may be made in the same manner, or
the surface of the higher grade material may be sawed out with an ordinary
band saw and tongued and grooved and applied to the base in the manner above
described. I do not limit myself as to the manner of forming either part,
whether by sawing or peeling.
I may also in the process, interpose apparatus, either electrical or of any other
kind, for the introduction of fireproofing material into the wood and may fire-
proof the whole or the surface part of the lumber.
Dated the 7th day of Santamban 1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
I, DAVID GILMOUR, of Dundas Street, in the Town of Trenton, in the County
of Hastings, in the Province of Ontario, Canada, Lumber Manufacturer, do
hereby declare the nature of my invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:
-
My invention relates to the manufacture of finished or high grade clear lumber,
deals and the like, which is designed to take the place of what is now known in
the market as good "clear" "picks" and "selects" and it consists in a pro-
cess or method of manufacture as hereinafter explained.
"

page_text: The rapid consumption and increasing scarcity of clear high grade lumber are
well known. The demand therefor is so much greater than the demand for the
lower grades that these lower grades continue to be abundant, while the higher
grades grow relatively more scarce and expensive.
My invention is designed to utilize these cheaper grades of material and the
general lumber wastes from the forest or saw log limits, for the base of the
lumber, while the surface of said lumber is composed of the finer and higher
grades, either of the same or of a different kind from the base.
The article of manufacture produced by me in the use of this invention consists
of a surfaces lumber, the body or thicker part of which may be made of a cheaper
or more imperfect kind of material of the lower grades, such as worm eaten or
knotty trees or parts of trees taken from the forest or from the comparatively
waste lumber from the saw-mill, these thicker parts being combined with a sur-
face material of a higher grade either of the same kind or of a different kind
from that of the body or thicker part of the finished lumber, the two parts being.
joined by fine tongues or grooves, which interlock and are united by any suitable
glue or cement, preferably water-proof. The parts are united firmly and are
finished so as to be ready for solid piling or for shipment by means of heat and
pressure which at the same time expels the moisture and superfluous glue and
leaves the surface in a solid compressed, condensed and finished condition and
the whole thoroughly seasoned. The method aforesaid is carried on by any suit-
able machinery such as that diagramatically shown in the drawing accompany-
ing my Provisional Specification, in which
The figure shows the various parts of the apparatus in conventional form and
diagramatically.
I describe the process used by me in the practical production of this lumber
giving all the steps both essential and non-essential in connection with the
apparatus as illustrated in the figure. For the surface of the finished lumber
I assume the logs of superior or high grade or of a comparatively expensive kind
of material to be taken as they come from the forest. These are first sawed into
suitable lengths and are subjected to the action of hot water or steam in a suit-
able tank. When thoroughly steamed and softened the logs are transferred to
a peeler B of ordinary construction from which the lumber is cut by the revolution
of the log against a knife in the ordinary manner, thence in a continuous strip
is taken to a clipper C which cuts it into pieces of suitable dimentions. These
pieces are next passed between pairs of steam heated rolls D where the pieces are
deprived of a greater part of their moisture and partially compressed. Thence
they are passed to a sticker E, in which one face is formed with fine tongues and
grooves preferably rectangular in cross section. From the sticker the pieces are
next immediately passed under a glue brush F which gives them a coating of
glue or cement on the tongued and grooved surface. Next to the said brush is
a table which receives the combined parts consisting of the finer surface material
heretofore referred to and the thicker body portion which has been tongued
and grooved in a similar manner to fit the tongues and grooves of the finer and
thinner part, and which, if desired, may also be coated with the glue or cement.
It will be understood that the grooves both in the thicker or body
portion and in the thinner or surface portion are made longitudinally
of the grain and the surface piece or any multiple thereof made of a
width to suit the width of the body portion is placed upon said body
portion with the tongues and grooves registering with each other. The parts
thus combined are passed between a series of heated pressure rolls G preferably
of gradually increased heat, where they are subjected to the heat and a high
degree of pressure which combine and weld together the two parts in one piece
which differs as to the quality of the material but is homogeneous practically
in its structure. The heat and pressure of the rolls are sufficient to expel the
remaining moisture and surplus glue, endwise of the grain through the end of
the piece, and to condense the surfacing material while the lumber is held in

page_text: place under the rolls and is passing thereunder so that the lumber emerges in a
finished condition and with a specially compressed and finished surface, and
requires no subsequent drying but is ready either for solid piling or for shipping.
In the above explanation I have assumed that the base or thicker part has
been sawed out in the usual manner, grooved and tongued and then combined
with the surface material. But the base may be made in the same manner, or
the surface of the higher grade material may be sawed out with an ordinary
band saw and tongued and grooved and applied to the base in the manner above
described. I do not limit myself as to the manner of forming either part,
whether by sawing or peeling.
I may also, in the process, interpose apparatus, either electrical or of any other
kind, for the introduction of fireproofing material into the wood and may fire-
proof the whole or the surface part of the lumber.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
1. The herein before described process of forming lumber composed of two parts
tongued and grooved to fit each other, said process consisting in first placing
the two parts together with the tongues and grooves interlocking and afterwards
passing these parts so interlocked between heated rolls, longitudinally of the
fibre of the lumber, and thus subjecting the parts to heat and pressure, succes-
sively from end to end, whereby the moisture is expelled, the surface condensed
and finished and the parts united and welded together, substantially as described.
2. The hereinbefore described process of forming lumber composed of two parts
tongued and grooved to fit each other, said process consisting in first applying
glue or cement, placing the two parts together with the tongues and grooves
interlocking, and afterwards passing these parts so interlocked, between heated
rolls, longitudinally of the fibre of the lumber, and thus subjecting the parts to
heat and pressure, successively from end to end, whereby the moisture. is expelled,
the surface condensed and finished, and the parts united and welded together,
substantially as described.
Dated the 1st day of January 1900.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.