Improvements in Pressing Electric Accumulator Plates and other Plastic Articles.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Pressing Electric Accumulator Plates and other
Plastic Articles.
We, ROBERT RITTER VON BERKS, Manufacturer, and JULIUS RENGER, Steward,
both of 20, Gyar utcza, Budapest, in the Kingdom of Hungary and Empire of
Austria, do hereby declare the nature of this invention to be as follows:-
The present invention relates to an arrangement for the pressing of electric
accumulator plates and the like plastic articles.
The invention consists essentially in that the pressing mould through which
the material is pressed and which possesses the shape of a section of the article
to be pressed is not constructed as hitherto usual of a single piece, but is com-
posed correspondingly to the sectional form of the article of several pieces, which
pieces can be adjusted interchanged and combined as may be desired, so that by
aid of this invention objects of different sectional form can be pressed without
rendering necessary a separate form for each section, which considerably reduces
the cost of working. The mould or form may consist for instance of stays or
bars which fit into a plate and can be adjusted therein by wedges. The mould or
form thus constructed may be covered by means of another plate connected with
the first plate by screws or the like. The second plate is preferably provided
with flanges to cause it to hold better.
When the pressure is applied the material passes through the wider orifices of
the pressing mould with little resistance consequently at greater speed than
through the more narrow parts of the same whereby the article is drawn out of
shape and becomes ununiform and liable to crack. In order to obviate this
drawback the resistance of the material may be artificially increased at such
points of the mould where the opening is wider. The simplest method of doing
this consists in shaping the openings through which the material is pressed to
contract towards the outside, whereas at the parts of the mould where the openings
are narrow these openings are widened towards the outside in order to reduce the
resistance as much as possible. In this manner the resistance of the material
can be regulated at will by means of the oblique construction of the opening
walls from the part opening outwardly, the parallel position, or up to the posi
tion narrowing outwardly so that the material emerges from the mould at each
point with equal speed, whereby a uniform dense and acid resistant article is
produced.
Dated this 15th day of April 1897.

page_text: Improvements in Pressing Electric Accumulator Plates and other
Plastic Articles.
We, ROBERT RITTER VON BERKS, Manufacturer, and JULIUS RENGER, Steward,
both of 20, Gyar utcza, Budapest, in the Kingdom of Hungary and 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:--
"
The present invention relates to an arrangement for the pressing of electric
accumulator plates and other plastic articles.
ܐ.
The invention consists essentially in that the pressing mould through which
the material is pressed and which possesses the shape of a section of the article
to be pressed is not constructed as hitherto usual of a single piece, but is com-
posed correspondingly to the sectional form of the article of several pieces, which
pieces can be adjusted, interchanged, and combined as may be desired, so that by
aid of this invention objects of different sectional form can be pressed without
rendering necessary a separate form for each section, which considerably reduces
the cost of working. The mould or form may consist for instance of stays or
bars which fit into a plate and can be adjusted therein by wedges. The mould or
form thus constructed may be covered by means of another plate connected with
the first plate by screws or the like. The second plate is preferably provided
with flanges to cause it to hold better.
When the pressure is applied the material passes through the wider orifices of
the pressing mould with little resistance consequently at greater speed than
through the more narrow parts of the same whereby the article is drawn out of
shape and becomes un-homogeneous and liable to crack. In order to obviate this
drawback the resistance of the material may be artificially increased at such
points of the mould where the opening is wider. The simplest method of doing
this consists in shaping the openings through which the material is pressed to
contract towards the outside, whereas at the parts of the mould where the openings
are narrow these openings are widened towards the outside in order to reduce the
resistance as much as possible. In this manner the resistance of the material
can be regulated at will by means of the oblique construction of the opening
walls from the part opening outwardly, the parallel position or up to the posi-
tion narrowing outwardly so that the material emerges from the mould at each
point with equal speed, whereby a uniform close and acid resistance article' is
produced.
Referring to the accompanying drawing:-
Figure 1 shews a front view of the apparatus.
Figures and 3 shew two longitudinal sections vertically superimposed.
Figure 4 shews a detail of the construction on a larger scale.
The mould of this invention consists of bars a b c (Figure 4) which bars are
arranged in the plate d and after adjustment are fixed by means of wedges e e
(Figures 2 and 4). The mould thus constructed is covered by means of the plate f
secured to the bedding plate d by screws or otherwise; the plate f is kept in place
by means of the flange g of the pressing device.
Figures 2 and 3 shew the method of operating the device:-The mould having
been adjusted as described, the piston p forces the plastic material supplied
through the pouring hole q into the expanding aperture of d and thence into the
mould, from which the compressed plate issues through the aperture in g. The
outline of the pressed plate may be varied as desired (see Figure 4):

page_text: Having now particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed we declare that what
we claim is:
1. An apparatus for the moulding of electric accumulator plates and other plas-
tic articles by pressure, in which the mould is composed of several parts, in such a
manner that by altering the position and combination of these parts various sec-
tional forms can be moulded.
2. The narrowing and widening of the various openings of the compression-
mould for the purpose of so regulating the resistance of the materials to be pressed
through the same, that the said materials may pass through all parts of the mould
at the same speed, and thus produce a dense uniform substance resistant to acids.
Dated this 4th day of January. 1898.
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C., Patent Agents for the Applicant.