Improvements in or relating to Presses for Forming Tubes, especially for Making Macaroni'.
Year: 1899

page_text: Date of Application, 3rd July, 1899-Accepted, 12th Aug., 1899
COMPLETE SPECIFICATION.
Improvements in or relating to Presses for Forming Tubes, especially
for Making Macaroni'.
I, EDUARD EBERHARDT, Manufacturer, Subject of the Grand-Duke of Badenia,
German Empire, resident of Mannheim, Badenia, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement:-
For forming tubes, especially macaroni, a matrix-plate lias generally
been used, in the holes of which mandrels were arranged being connected
to the cross-pieces of a mandrel-holder, the said cross-pieces resting on
the matrix-plate. Now, when the material which is to be formed into
tubes (for example the dough) is pressed into the matrix-plate by the
piston which exactly fits the press-cylinder, said material (dough or the like)
is forced against the cross-pieces of the mandrel-holder, whereby the same is
divided by the said cross-pieces into several strips or ribbons, so that two or
three of the latter are discharged into one single hole of the matrix-plate, ac-
cording as the mandrel is carried by only one cross-piece or by two of them.
In the holes of the matrix-plate the strips or ribbons must again meet together,
in order that the product leaving the press be formed into compact tubes pre-
senting neither flaws or other defects. In this way, however, the strips or
ribbons are often but very imperfectly united in the matrix-plate. The tubes
therefore leave the press in halves or they present flaws, so that the product
cannot be brought on the market.
.
In order to obviate these imperfections, the material to be formed into tubes,
after it has been divided into several strips or ribbons, is in the present invention
formed into a single and compact body or mass before the same pass through the
matrix-plate.
In the accompanying drawings forming a part of this specification,
Fig. 1 is a plan of the matrix-plate, a part of the mandrel-holder being
omitted.
Fig. 2 is a sectional side-view of the matrix-plate.
Referring to the drawings, the matrix-plate 6 is provided in the usual way
with the conical holes a. Further, the matrix-plate is connected to a mandrel-
holder e formed with the holes d, said mandrel-holder e being held apart from
the matrix-plate b by means of the bolts c¹. The matrix-plate fits the interior
of the press-cylinder exactly, whereas the mandrel-holder e leaves a certain
amount of play, so that the material to be formed into tubes can reach the
matrix-plate through both the holes d of the mandrel-holder e and the cir-
circumferential opening between said mandrel-holder and the press-cylinder.
The press-piston which acts on the material to be formed into tubes presses a
greater quantity of material (dough or the like) through the mandrel-holder than
the one which corresponds to the diameter of the nozzles of the matrix-plate b.
Owing to this fact, the material is accumulated in the chamber g situated between
the mandrel-holder e and the matrix-plate b. Now, if the pressure be continued
long enough, the single strips or ribbons are again united to a homogeneous and
En
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compact mass which surrounds completely the mandrels and leaves the nozzles f
of the matrix-plate b in the form of tubes not presenting any flaws.
Although the described arrangement is especially applicable to presses in-
tended for making macaroni it can also be used for making leader and rubber
tubes, in which case it is well to use a matrix-plate provided with a mandrel
holder held some distance apart from said matrix-plate, in order to obtain tubes
which are quite free from flaws.
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
In presses for making metal, rubber, or macaroni-tubes, to form a cover
or bottom for the press-cylinder containing the material to be formed into tubes;
a matrix-plate (b) provided with a mandrel-holder (e) formed with holes (d)
and held some distance apart from said matrix-plate (6), so that the mandrel
holder (e) forms with the matrix-plate (b) a chamber (9) in which the strips or
ribbons of the material (dough or the like) are united to one single homogeneous
and compact body or mass, which being pressed through the matrix-plate (6)
gives tubes completely free from flaws, substantially as set forth.