Improvements relating to the Dyeing of Wood, and to Apparatus for Use in connection therewith.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements relating to the Dyeing of Wood, and to Apparatus for
Use in connection therewith.
We, JOSEF PFISTER, Engineer, of Asperngasse 4, Vienna II, HANS PAETZ,
Landed Proprietor, of Windmühlgasse 38, Vienna VI, and LEOPOLD LEWIN,
Government Employee, of Dingelstedtgasse 4, Vienna XV, all in the Empire
of Austria, do hereby declare the nature of this invention to be as follows:-
This invention relates to a method of dyeing wood, mainly characterized in
that the wood is impregnated with the dye in the direction of the fibres or
grain and also to an arrangement for carrying out the said process.
. According to this method the dyeing of the wood is preferably effected in the
trunk-wood by subjecting the entire end surface of the trunk to the pressure of
the dye-liquor which it is desired to inject.
In carrying out the invention the trunk-end is fitted with a cap the interior
of which is in communication with the desired colouring liquor under pressure.
The cap consists of an india rubber ring fitting around the edge of the cross-
cut of the trunk of the tree and upon this is tightly pressed a plate provided
with a tubular union or socket.
The head plate may be secured upon the end of the trunk by draw-bolts when
only short trunks are being treated, the bolts being secured in a frame at the
opposite end of the trunk.
For long trunks the bolts may either be separately clamped into the trunk
or they may be secured in position by fastening to a ring retained in position
by cramp-irons hammered into the sides of the trunk at the required distance
from the end to suit the length of the draw-bolts. In order to assist the ring
against the stress from the bolts each such bolt may be furnished with anchor-
hooks attached to each side of the pin of the bolts and adapted to grip into the
wood of the trunk.
The bolts are in this case formed with strap-heads which are placed over the '
projecting lugs of the cap-plate and into which are screwed the tightening
screws.
The arrangement is completed by connecting the inlet socket or union with
the pressure conduit for the dye or colorant. The required pressure may be
obtained by placing the vessel containing the dye or colorant at a suitable level
above the trunk, or by using a force-pump, or also by having a closed vessel
under pressure.
By the pressure thus created in the interior of the cap the dye or colorant
is forced into the wood cells in the direction of the fibres or grain while the
residual fluid is gradually driven out at the open opposite end of the trunk.
The dyeing or colouring of the wood according to this method may be effected
either direct by the impregnated fluid, or two or more fluids acting in succession
or simultaneously either upon the wood cells or upon each other may be used.
If desired previous to forcing in the real colorant a mordant a liquid for opening
the wood cells, or a gas or steam may be injected.

page_text: The temperature of the dye or colorant to be injected varies with the nature
thereof.
Dated this 13th day of September 1899.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicants.
Improvements relating to the Dyeing of Wood, and in Apparatus for
Use in connection therewith.
We, JOSEF PFISTER, Engineer, of Asperngasse 4, Vienna II, HANS PAETZ,
Landed Proprietor, of Windmühlgasse 38, Vienna VI, and LEOPOLD LEWIN,
Government Employee, of Dingelstedtgasse 4, Vienna XV, all in the Empire
of Austria, do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in
and by the following statement :-
—
This invention relates to a method of dyeing wood, the main feature of
which is that the wood is impregnated with the dye in the direction of the fibres
or grain and our invention also relates to apparatus for carrying out the said
method; such apparatus being shown in the accompanying drawing, in which
Figure 1 is a longitudinal section of a tree trunk having our improved
apparatus applied thereto.
Figure 2 is an end view of the same.
Figure 3 is a side elevation of another form of apparatus adapted for usc
with tree trunks of considerable length, and
Figure 4 is an end view thereof.
According to this invention the dyeing of the wood is preferably effected in
the trunk-wood by subjecting the entire end surface of such trunk to the
pressure of the dye-liquor which it is desired to inject.
In carrying our invention into practice, the trunk-end is fitted with a cap
the interior of which is in communication with the desired colouring liquor
under pressure.
This cap consists of an india rubber ring b fitting around the edge of the
cross-cut of the trunk a of the tree, and upon this is tightly fitted a head plate c
provided with a tubular union or socket d.
The head plate c may be secured upon the end of the trunk by draw-bolts f
as shown in Figures 1 and 2, when short trunks only are being treated. The
bolts are suitably secured to a frame K at the opposite end of the trunk.
For long trunks the bolts f may either be separately clamped into the trunk
or they may be secured in position as shown at Figures and 4, by fastening to
a ring retained in position by cramp-irons h hammered into the sides of the
trunk at the required distance from the end to suit the length of the draw-
bolts. In order to assist the ring g in resisting the stress from the bolts f,
each such bolt may be furnished with anchor-hooks m attached to each side
of the pin of the bolts and adapted to grip into the wood of the trunk.
The bolts are in this case formed with strap-heads which are placed over
the projecting lugs p of the head-plate e and into which are screwed the
tightening screws q.
The arrangement is now completed by connecting the inlet socket or union d
with the pressure, conduit for the dye or colorant. The required pressure- may

page_text: be obtained by placing the vessel containing the dye or colorant at a suitable
level above the trunk, or by using a force-pump, or by other suitable means such
as the employment of a closed vessel under pressure.
By the pressure thus created in the interior of the cap, the dye or colorant
is forced into the wood cells in the direction of the fibres or grain while the
residual fluid is gradually driven out at the open opposite end of the trunk.
The dyeing or colouring of the wood according to this method may be effected
either directly by the impregnated fluid, or by means of two or more fluids acting
in succession or simultaneously either upon the wood cells or upon each other.
If desired, previous to forcing in the colorant, a mordant or liquid for opening
the wood cells, or a gas or steam may be injected.
The temperature of the dye or colorant to be injected varies with the nature
of the liquid employed.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that
what we claim is:-
1. A method of dyeing or colouring wood in the form of trunks consisting in
impregnating the tree trunk from its end with one or more liquids containing
the dye or colorant, said tree trunk being if desired previously treated with
other liquids, vapours, gases or steam for scouring and opening the wood cells
substantially as described.
2. An apparatus for carrying out the method claimed in Claim 1, consisting
mainly in applying a packing ring to the edge of the cut-end of the trunk and
an end plate forming a cap provided with an inlet socket or union adapted
to convey the colouring liquid under pressure to the tree trunk said cap and
socket being secured by draw-bolts either to the other end of the tree trunk
or adapted to be engaged upon the sides of the tree trunk substantially as
described.
Dated this 13th day of January 1900.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicants.