Improved Method of Manufacturing Earthen-ware Pipes.
Year: 1899

page_text: Date of Application, 2nd June, 1899-Accepted, 26th Aug., 1899
COMPLETE SPECIFICATION.
Improved Method of Manufacturing Earthen-ware Pipes.
1, WILLY MOBIUS, of 13, Baringstrasse, Hanover, Kingdom of Prussia, German
Empire, 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:-
My invention relates to an improved method of manufacturing earthen-ware
pipes and has for its objects:
Firstly, to widen or increase the area of the outlet apertures of the press mouthi-
piece without increasing the dimensions of the pipes, and by this means to
influence the pressing in the most favourable degree.
Secondly, to bring the pressed pipes in such a mutually relative position that
the operation of separating, removing, and transporting the pipes to the drying
room is greatly simplified and the productive capacity of the working staff con-
siderably increased.
Whatever the form of pressing machine employed, the method of manufactur-
ing earthenware pipes consists-as is well known-in forming the interior space
of the pipes by the aid of a central core.
By reason of the small cross section of material in thin-walled pipes, the presses
for this purpose are required to work at low pressure, that is to say, the capacity,
of a single press depends on the size of the outlet aperture through which the
clay is expressed, since, if the clay be subjected to excessive pressure, it has to
overcome too great a friction, in consequence of which it becomes hot and so
dense, that even the high pressure of the largest presses is insufficient to overcome
the friction in the mould of the press.
press
By making several pipes, in close proximity to one another, at the same time,
the ratio between the outlet aperture and the press mechanism is improved;.
nevertheless, the surface exposed to approximately uniform pressure in the press
mechanism is still insufficient to enable the desired ratio between the
mechanism (worms, rollers, plungers) and the outlet aperture of the mouth piece.
Hitherto this fact has received too little attention, owing to the circumstance
that, by reason of the tediousness of the work of removing the pipes issuing from
the press mechanism, the capacity of the latter can only be partially utilized.
By my improved method of manufacturing earthen-ware pipes all these disad-
vantages are obviated, and a perfect product obtained.
This improved method of manufacture consists in pressing, at one and the
same time, a series of pipes situated within one another, in the manner described
below and shown in the accompanying drawings, of which:
Fig. 1 is a front view of the required press mouthpiece;
Fig. 2 the rear view of the same;
Fig. 3 a cross section of the said mouthpiece;
The mouthpiece consists of the plate P, with the central bell shaped piece G
and the two knives M and M arranged concentric thereto, the whole being fas-
tened to the plate by connecting flaps attached to the cross-bar B.
By means of this arrangement the single string of tubing fed to the knivac from

page_text: the back, is formed into three strings of tubing R, R¹ and R2 of which R is formed
between G and M, R¹ between M and M, and R³ between M¹ and the inner
edge of the plate P. The number of knives may be altered in accordance with
the size of the press.
The strings of piping R, R1, R2 situated one inside the other, issue simultane-
ously from the press and are then cut, by a cutting apparatus of a known con-
struction, into the desired lengths, each by a single stroke of the cutter, without
any interruption of the moulding operation.
When cut, the lengths of pipes are conveyed to the drying room, without the
individual pipes being taken apart, and are either merely air-dried, dried
through, or fired, according to convenience or circumstances, and are then taken
apart.
According to the arrangement of the mechanism described above, the improved
press will turn out double or three fold the quantity of pipes, as in existing
forms; it will also be evident that in the pressing of pipes by my improved
method, a relative reduction of the number of pieces to be handled will also
result in the increased working capacity of the working staff.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
1. The method of manufacturing, simultaneously, several pipes formed one
inside another in the operation of moulding, substantially as set forth.
2. In presses for manufacturing earthenware pipes, the arrangement of a
mouthpiece allowing of performing the method claimed in the First Claim, sub-
stantially as set forth and shown in the drawings.
3. In presses for manufacturing earthen-ware pipes, the employment of the
outer casing of the press mould consisting of a bell and an inner casing, as the
core for a second pipe the outer casing of which may be utilised in turn as a
core of a third pipe and so on, substantially as described and shown in the
drawings.
4. In presses for manufacturing earthenware pipes according to the method
claimed in the First Claim, the employment of a cutting apparatus of usual con-
struction by which the strings of piping situated one inside the other, are simul-
taneously cut into the desired lengths by one and the same single stroke of the
cutter, without any interruption of the moulding operation, substantially as set
forth.
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