Year: 1889

page_text: 1, EMIL UBRIG, of Westend, Berlin, in the Empire of Germany, Manufacturer
do hereby declare the nature of my said 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 improvements in mincing machines, said mincing machines
being constructed with interchangeable knives or cutters which, in order to form a
large number of cutting surfaces, are undercut, that is, the same are, on their lower
side, cut out and sharpened so that the moat pressed against the casing and again
raised by the pins on the rotary shaft is repeatedly cut through by the lower and
lateral knives or cutters and is also cut when the said meat is being raised.
The capacity of my improved machine has proved to be very much greater than
the machines hitherto in use. The knives are so arranged in grooves in the case of
the machine that they can be readily removed for being cleaned or sharpened, the lugs
for holding the same in position being arranged in cavities in the lower part of the
casing of the machine, whilst the other lugs or holders are simply laid on the lower
part of the casing and enter into corresponding recesses in the lid or cover. By
employing this device I attain the advantage that when the lid is opened one side of
the knives is free so that the same can be readily removed and are not liable to
become fixed by rust or the like.
In the accompanying drawings, Figure 1 is a vertical section through the machine,
the interior arrangement in elevation.
Figure 2 is a top view of the same with the lid or cover removed.
Figure 3 represents a modified form of the knife.
a is the frame of the machine in which the rotary shaft e, which
the spirally arranged pins or pegs b, has its bearings.
provided with
The knives d, between which the pins or pegs of the shaft e run, are so formed
that cutting surfaces d for cutting the meat are not only produced at the upper
edge of the knife directed towards the shaft, but the edges of the recessed periphery
of the knives are also sharpened to form cutters d so that when the meat pressed
against the casing of the machine is raised by the pins or pegs b, the said meat
will be repeatedly operated on by the lower cutting surfaces d².

page_text: The knives are retained in the casing of the machine by means of the lugs d³, d*,
the lugs d³ being arranged in cavities in the casing, whilst the lugs d' are only laid
onto the casing and when the lid or cover is closed, enter into corresponding
recesses in the same. The advantages of my improved machine is mentioned in
the preamble to this specification.
According to Figure 3 the knives are so formed that they possess a front and
rear cutting surface above the lug d' and so that about two thirds of the periphery
of the shaft c is surrounded by the knives d.
Figure 4 is the section of a modified form of mincing machine, according to which
the knives are not undercut and provided with cutting surfaces on their lower
edges, but the entire lower edges are made into cutting surfaces, so that the said
knives are provided with double cutting surfaces. In order to allow the meat to be
operated on by both surfaces d¹ d² of the knives, the lower part of the casing is
provided with trough like recesses a¹ to secure the operation of the cutting surfaces d²
on the meat.
It will be evident that the proportions of the parts and the form of the same can
be varied in many ways without departing from the nature of my invention.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, what I claim is :-
1. A mincing machine in which the interchangeable knives d are provided with
double cutting surfaces so that the meat to be cut or minced is not only operated on
by the upper or inner cutting surface d' but also when the meat is raised by the
pins or pegs by means of cutting surfaces formed by a cutting out and sharpening
the lower surfaces of the knives as for instance at d² (Figs. 1 to 3) or by employing
cavities or recesses a¹ in the lower part of the casing a and sharpening the lower
edge of the knife, substantially as and for the purpose set forth.
2. Retaining the knives claimed in claim 1 in position by the lugs 3 of the
same being fitted into recesses or grooves in the casing to the machine, whilst the
lugs enter into corresponding recesses of the lid or cover when the same is
closed, substantially as and for the purpose set forth.
Dated the 7th day of March 1889.