A New or Improved Method of Bleaching Wood, Bobbins, Reels, and other Articles Made from Wood.
Year: 1889

page_text: Date of Application, 17th Oct., 1889
Complete Specification Left, 5th July, 1890-Accepted, 9th Aug., 1890
PROVISIONAL SPECIFICATION.
A New or Improved Method of Bleaching Wood, Bobbins, Reels,
and other Articles Made from Wood.
I, ARTHUR GREG of the firm of James Chadwick and Brother of Eagley Mills near
Bolton in the County of Lancaster, Thread Manufacturers, and of Staveley near
Kendal in the County of Westmoreland, Bobbin Manufacturers, do hereby declare the
nature of my said invention to be as follows:-
This invention relates to a new or improved method of bleaching wood of a dark or
semi-dark nature or color, bobbins, reels, and other articles made from wood, and has
for its object that of making wood or articles constructed therefrom to imitate
sycamore
or other white wood.
This I effect by placing the wood or articles to be bleached in a vat or cistern con-
taining water saturated with lime or other suitable alkaline for a definite or an indefinite
period as desired or requisite. After the articles are removed from the lime or other
alkaline bath they are placed in a vat or cistern containing water saturated with
chloride of lime, wherein they are allowed to soak as long as desired or requisite.
They are then removed to a third vat containing water saturated with sodium hypo-
sulphite for a sufficient period to destroy the action of the chloride of lime. The
wood articles are then removed to a stove wherein sulphur is burned; the action of
the fumes intensifying the bleach, or in lieu of the sulphur stove the wood or other
articles can be placed in a water bath saturated with sulphurous acid or other analogous
acid. They are then removed to a vat or cistern containing water saturated with
acetic acid or other analogous acid for the purpose of replacing the natural acid
displaced by the before mentioned baths. When they are removed from this bath
they are then subjected to atmospheric action and dryed, after which polishing can be
effected by friction or other processes.
In another modification or process of this invention I can effect similar results by
dispensing with the chloride of lime and the sodium hyposulphite baths. In this case
the wood or other articles are removed from the lime or other suitable alkaline hath
direct to the sulphur stove, or to the sulphurous bath or its equivalent, after which
they are operated upon and finished as previously described.
Dated the 16th October 1889.
EDMUND CHADWICK,
A cent
COMPLETE SPECIFICATION.
A New or Improved Method of Bleaching Wood, Bobbins, Reels,
and other Articles Made from Wood.
I, ARTHUR GREG, of the firm of Jaunes Chadwick and Brother of Eagley Mills near
Bolton in the County of Lancaster, Thread Manufacturers, and of Staveley near Kendal
in the County of Westmoreland, Bobbin Manufacturers, do hereby declare the nature
of my said 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 new or improved method of bleaching wood of a dark or
semi-dark nature or color, bobbins, reels, and other articles made from wood, and has
for its object that of making wood or articles constructed therefrom to imitate sycamore
or other white wood.
This I effect by placing the wood or articles to be bleached in a vat or cistern con-
taining water saturated with lime or other suitable alkaline for a definite or an indefinite
period as desired or requisite. After the articles are removed from the lime or other
E
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page_text: alkaline bath they are placed in a vat or cistern containing water saturated with chloride
of lime, wherein they are allowed to soak. as long as desired or requisite. They are
then removed to a third vat containing water saturated with sodium hyposulphite for
a sufficient period to destroy the action of the chloride of lime. The wood articles are
then removed to a stove wherein sulphur is burned; the action of the fumes intensifying
the bleach, or in lieu of the sulphur stove the wood or other articles can be placed in
a water bath saturated with sulphurous acid or other analogous acid. They are then
removed to a vat or cistern containing water saturated with acetic acid or other
analogous acid for the purpose of replacing the natural acid displaced by the before
mentioned baths. The acetic acid or other analogous acid bath can be dispensed with
in case it is undesirable to replace the natural acid displaced by the before mentioned
baths.
When the wood or other articles made from wood are removed from the acetic
acid or other analogous bath they are subjected to atmospheric action and dryed, after
which polishing can be effected by friction or other processes.
In another modification or process of this invention 1 can effect similar results by
dispensing with the chloride of lime and the sodium hyposulphite baths. In this case
the wood or other articles are removed from the lime or other suitable alkaline bath
direct to the sulphur stove, or to the sulphurous bath or its equivalent, after which
they are operated upon and finished as previously described.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
The processes of bleaching wood of a dark or semi-dark nature or color, bobbins,
reels, and other articles made from wood to imitate sycamore or other white wood,
substantially as described.
Dated the 28th June 1890
EDMUND CHADWICK,
Agent.