An Improved Method of Making Perforations of Uniform Diameter in Nozzles for Presses, Plates, and similar Articles.
Year: 1897

page_text: Date of Application, 13th Apr., 1897-Accepted, 7th Aug., 1897
[Communicated from abroad by ROGNOR SOHLMAN, of Bofors, Sweden, Engineer,
and Executor of the late Alfred Nobel deceased, of the same place.]
An Improved Method of Making Perforations of Uniform Diameter in
Nozzles for Presses, Plates, and similar Articles.
I PHILIP ARTHUR NEWTON of the Office for Patents, 6 Bream's Buildings,
Chancery Lane in ae County of London, 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:--
In the attempts made to produce press-nozzles, press-plates, and similar articles
required to be provided with fine perforations, for instance, such nozzles as are
used for forcing though a substance which afterwards solidifies, as in the manu-
facture of artificial silk, some difficulty has been experienced in making each hole
of a uniform diameter.
The present invention relates to a method of entirely obviating this difficulty,
so as to obtain straight holes of an exactly uniform diameter, and of whatever
gauge required.
The method consists in embedding in the press nozzle, or other article which is
to be provided with perforations, fine straight wires of platinum or other metal or
alloy, having a sufficiently high fusing point, said wires being drawn to a diameter
equal to that of the required perforations, and placed in the directions and positions
that the perforations are to have in the article. Such press-nozzles may, for
instance, be made of glass, clay, porcelain, or cement. The wire or wires embedded
in the glass or other material in one manner or another, are afterwards dissolved
by means of an acid, as nitro muriatic acid, or by other suitable chemical agents,
the result being the formation of clean perforations, uniform in size, when the
metal has been eaten away. As is well known, such metal wires may be obtained
of almost any desired small size, and of perfectly uniform gauge, and, as a matter
of fact, this novel method of producing perforations has given excellent satisfaction
in practical use.
It will be obvious that the wires employed must be made of metals which do not
fuse at the same, or a lower temperature than that to which the material is sub-
jected in the manufacture of the nozzle or other article.
It is known that in manufacturing plates of easily perforated material for
storage batteries, it is customary to sew through said plates, and the composition
between them, with cellulose fibres, which are afterwards destroyed by acid, and
subsequent drying, with the view to produce perforations for facilitating the
circulation. It is not, therefore, proposed to claim the method of sewing through
the plate with fibre, together with the subsequent destruction of the latter by acids,
since the result aimed at with the present invention is not secured by such a
proceeding.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me
from abroad, I declare that what I claim is:
-
The manufacture of press-nozzles, plates, and other articles with fine straight
perforations of uniform diameter, by embedding in the material of which the
article is to be composed, at the point or points where the perforations are required,
one or more straight metal wires of a uniform gauge, corresponding to the diameter
of the perforations required, and afterwards eating away said wires by an acid or
other chemical agent.