Improvements in Apparatus for the Manufacture of Varnish.
Year: 1887

page_text: Date of Application, 30th Apr., 1887.
Specification Accepted, 10th June, 1887.
[Communicated from abroad by RICHARD LEHMANN, of No. 1 Kurzestrasse, Dresden,
Saxony, German Empire, Engineer.]
Improvements in Apparatus for the Manufacture of Varnish.
I, WILLIAM LLOYD WISE, of No. 46 Lincolns Inn Fields, in the County of
Middlesex, Consulting Engineer, and Patent Agent, 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 improvements in apparatus for the manufacture of oil-lac,
which as is well known is formed of a composition of molten fossil resins (such as
amber or copal), oil varnish and turpentine-oil.
Such resins have heretofore been melted by superheated steam the apparatus
employed working in combination with a superheater therefor.
By the use of apparatus constructed in accordance with this invention the melting
of the resins is accomplished in an efficient manner, without loss of material, and there
is combined with the melting apparatus a receptacle for heating the oil varnish by the
waste steam from the melting apparatus, in which receptacle also the molten resin can
be mixed with the heated oil varnish the cost of production being thus reduced and the
apparatus simplified.
Fig. 1 of the annexed drawing is a longitudinal section of the complete apparatus,
Fig. 2 is a cross section of the same and Fig. 3 a plan. The portion of the apparatus
inarked 1 constitutes the melting apparatus and the portion marked II the mixing
apparatus.
The melting apparatus comprises a melting vessel A having an upper portion or
body C and cover o.
The melting vessel A is composed of funnel shaped pipes a and cylinder b the
latter being inclined and being closed at each end by the covers d and e respectively.
By this construction of parts a large heating surface is obtained.
The lower portion of the melting apparatus is surrounded by brick work, as shewn
and also by a steam jacket B into which a perforated steam pipe D is introduced,
whereby superheated steam from any convenient source is led into the said jacket.

page_text: Water of condensation generated within the steam jacket at the commencement of the
molting process is led off by pipe F (fig. 1.) During the melting process the steam is
conducted by the pipe E to the steam jacket surrounding the mixing vessel H to heat
the oil varnish therein as hereafter described, after which the steam escapes to the
atmosphere.
The cover is removable; it is held in place by clamps l. mm are openings having
proper coverings as shewn and through which the melting apparatus is supplied with
the resin; n is a conduit for conducting the distilled oils of the resin under treatment
into a condenser.
The brick work at M is so constructed as to allow of its removal for cleaning
purposes and the cover c of the steam jacket B and the cover d of the cylinder b being
..likewise removable for the same purpose.
At the opposite side, the cover e of the cylinder bis provided with a tubular
extension having a valve g that can be opened or closed by means of રી. handwheel h
as well understood.
When the melting process is completed the valve g is carefully opened thus allowing
the melted material to flow by means of a conduit into the mixing apparatus
containing the heated oil varnish.
The mixing apparatus is composed of a vessel H, inserted in a steam tight jacket J
which is fed with the waste steam from the melting vessel, so as to heat the oil varnish
contained in the vessel H, after which the steam escapes to the atmosphere. After
the molten resin and the oil varnish have been properly mixed in the vessel H the
necessary quantity of turpentine oil is added, and the manufacture of the lac
completed.
Having now particularly described and ascertained the nature of the said invention
and in what manner it is to be performed I declare that what I claim is :=
1. Apparatus for melting resins such as amber, and copal, consisting mainly of a
melting vessel A a rising body C and cover o, the melting vessel being surrounded by
a steam jacket B in which steam is introduced substantially as described and illustrated
and for the purpose specified.
2. The use in conjunction with apparatus such as referred to in claim 1 of apparatus
for heating oil varnish and for mixing the latter with melted resin consisting mainly
of the vessel H surrounded by the steam jacket J into which the waste steam from the
melting apparatus is introduced to heat the oil varnish before and during its mixture
with the melted resin substantially as described.
3. The combined apparatus for manufacturing oil-lac constructed and arranged
substantially as described with reference to the drawings.
DL:
1
Ր
1007