Improvements in Press-plates for Oil-extracting Presses and the like
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Press-plates for Oil-extracting Presses and the like,
I, ROBERT MIDDLETON, of Sheepscar Foundry, Leeds, in the County of York,
Engineer, do hereby declare the nature of this invention to be as follows;-
It has reference to press-plates such as are used in the "Anglo-American" oil
press, in which a number of oil-cakes are pressed at one and the same time, the
various cakes being separated by metal plates.
An objection to this mode of pressing lies in the fact that there is no outlet
for the oil from the centre of a cake except through the outer parts of the cake
itself.
The object of the invention is to produce a plate that, whilst presenting suit-
able surfaces to the cakes above and below when under pressure, shall be so sup-
plied with accessible escape channels, that there shall be complete facility for
the rapid and thorough escape of oil from any part of a cake and through any
part of the plate.
I accomplish my object as follows:-
:-
I arrange, side by side, a number of bars whose cross-sections present the
necessary top and bottom, flat or waved, surfaces for pressing purposes, and whose
centre-sections are so far narrow-waisted, or otherwise undercut, that a channel
for the escape of the oil is formed between adjacent bars, and this without leav-
ing space on the surfaces for the reception of anything solid.
A set of such bars may be united in a strong outer frame, and in the ends of
this frame holes would be provided opposite the draining channels for the escape
of the liquid and to give access to the interior for cleaning or like purposes.
Strong tie-bolts or stays may be introduced to keep the bars in position when
under pressure, and these may take up intermediate positions between the end
stays, or end framing. The ends of the draining bars may be sunk into the
framing in any suitable manner, so that the whole may present the usual top
and bottom surfaces.
Or in lieu of the outer frame a plate may be formed from two sets of bars
fixed to a strong centre plate.
In some cases the bars may be held together simply by tie bolts, the bars being
specially shaped in cross section for this purpose.
Although for descriptive purposes the plates are set out for use in extracting
oil from seeds and the like, it follows that they may be used for extracting fluids
generally.
Dated this Twentieth day of June 1898.
WM. SNOWDON,
Agent for Applicant,
Box W.S., 24, Basinghall Street, Leeds.

page_text: Improvements in Press-plates for Oil-extracting Presses and the like.
I, ROBERT MIDDLETON, of Sheepscar Foundry, Leeds, in the County of York,
Engineer, 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;-
It has reference to press-plates such as are used in the "Anglo American" oil
press, in which a number of oil-cakes are pressed at one and the same time, the
various cakes being separated by metal plates.
An objection to this mode of pressing lies in the fact that there is no outlet
for the oil from the centre of a cake except through the outer parts of the cake
itself.
The object of the invention is to produce a plate that, whilst presenting suit-
able surfaces to the cakes above and below when under pressure, shall be so sup-
plied with accessible escape channels, that there shall be complete facility for
the rapid and thorough escape of oil from any part of a cake and through any
part of the plate.
I accomplish my object as follows:--
In order however to fully explain my invention I have annexed a drawing
on which Fig. 1 is a cross section through several adjacent bars, as on the line U, V,
in Fig. 2; Fig. 2 is a plan view of a built-up plate, of which Fig. 3 is an end
view, and Fig. 4 a corresponding section on the line, W, X; Fig. 5 is a portion
of another cross-section of a different class of plate; Figs. 6 and 7 are further
portions of cross sections such as would appear on the line Y, Z; in Fig. 8, which
tig. shows a plan of another system of building and bolting up the bars.
I arrange, side by side, a number of bars A whose cross-sections present the
necessary top and bottom, flat or waved, surfaces for pressing purposes, and whose
centre-sections are so far narrow-waisted, or otherwise undercut, at B that a chan-
nel C for the escape of the oil is formed between adjacent bars, and this without
leaving gaping spaces on the surfaces for the reception of anything solid. In
Fig. the tops of bars are shown waved, with their bases flat, for explanatory
purposes only.
A set of such bars may be united in a strong outer frame as shown in Fig. 2,
and in the ends of this frame holes D would be provided opposite the draining
channels C for the escape of the liquid and to give access to the interior for
cleaning or like purposes. Strong tie-bolts or stays E may be introduced to keep the
bars in position when under pressure, and these may take up intermediate posi-
tions between the end stays, or end framing as at E. The ends of the draining
bars may be sunk into the framing in any suitable manner as at F in Fig. 4, so
that the whole may present the usual top and bottom surfaces whether flat or
waved. A bar may also have its end prolonged and screwed so as to form a cross
stay as at G in Fig. 2.
Or in lieu of the outer frame a plate may be formed from two sets of bars fixed
to a strong centre plate as shown in Fig. 5, where H is the plate and A, A, etc.,
are the bars. The necessary uniting rivets J being shown in dotted lines.
In some cases the bars may be held together simply by tie bolts, the bars being
specially shaped in cross section for this purpose. This class of cross section is
shown in Figs. 6 and 7 where it will be noticed that the nipping up of the bolts E
cannot damage the mitred edge on the surface, as the centre portion of the bars
touch one another. In Fig. 7 the channels for the escaping fluid are confined to
one side of the bars, the other being left flat for economy in construction.
bars with double channels may be alternated with plain bars if more convenient.
Or,

page_text: In every case the channels are so arranged that they may be cleared by a rod
or wire, as shown.
Although for descriptive purposes the plates are set out for use in extracting
oil from seeds and the like, it follows that they may be used for extracting, fluids
generally.
Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, declare that what
I claim is:
1. The method of building-up press-plates with accessible internal channels
after the manner described herein and shown on the drawing, with the object
and for the purpose set forth.
2. The method of building-up press-plates, in which recessed bars are secured
in an outer frame substantially as described herein and shown in Figs. 2, 3
and 4, with the object and for the purpose set forth.
3. The method of building-up press-plates, by which recessed bars are secured
to a central plate, substantially as described herein and shown in Fig. 5, with the
object and for the purpose set forth.
4. The method of building-up press-plates by which specially recessed bars
are united by bolts, substantially as described herein and shown in Figs. 6, 7
and 8, with the object and for the purpose set forth.
Doted this Twentieth day of March. 1900
WM. SNOWDON,
Agent for the Applicant,
24, Basinghall Street, Leeds, Yorks.