An Improved Grater.
Year: 1893

page_text: Date of Application, 14th Feb., 1893
Complete Specification Left, 11th Nov., 1893-Accepted, 20th Jan., 1894
: An Improved Grater.
:
I, JOHANN MACEK, of Ottenau, Baden, in the Empire of Germany, Master-
brazier, do hereby declare the nature of this invention to be as follows:-
My invention relates to a grater which is so constructed that both its sides can
be used. For this purpose it is made of corrugated sheet metal, which has also the
effect of increasing its resistance to injuries.
The improved grater may either be made of the well-known corrugated sheet
metal or by forming undulated depressions with the aid of stamps.
For enabling the grater to be used on both sides the apertures in these sides are
punched from the interior of the corrugations through the bottom of the latter. In
this manner I obtain on both sides apertures with teeth directed outwards.
The
said apertures are preferably made of different sizes so that a single grater may be
used for a coarser or finer product according as the grating takes place on one or
the other side.
The corrugated sheet metal provided with such apertures is fixed to a bow-piece,
the lateral parts of which serve for strengthening and stiffening the corrugated
sheet metal. In a grater having its corrugations produced by a stamp this
stiffening is not absolutely necessary, as the edge will sufficiently stiffen the sheet
metal. But this grater may also be fixed. to a bow-piece. Both the shape and
direction of the corrugations is optional.
The practical advantage of the improved grater consists in that it can be
conveniently cleaned, inasmuch as the material which collects in the intermediate
spaces may be readily brushed or scraped out, or removed by means of a jet of
water impinging against either rear side. When grating very juicy material the
corrugations facilitate the flow of the liquid which oozes out; for this purpose a
grater with inclined corrugations is particularly adapted. Such a grater is also.
more effective than those made of smooth sheet metal because the teeth surrounding
the apertures occupy a more favourable position.
Dated this 14th day of February 1893. **
..:
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
.A.
COMPLETE SPECIFICATION.
An Improved Grater.
1, JOHANN MACEK, of Ofeilgasse No. 1 Vienna in the Empire of Austria,.
Tinman and Brassfounder, 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 :-
:
This invention relates to a grater which may be used on both sides with equal
advantage and effect, and in comparison with the ordinary half-round grater, offers
the following advantages.
1. It is quite free from danger, and the risk of injury to the hand by sharp
projecting edges is entirely obviated.
2. It can easily be cleansed, because owing to the numerous orifices, the grated
material escapes freely, and choking and stoppage never occur.
IP 71

page_text: 3. It can be used for coarse just as well as for fine material, as the teeth are
larger on the inner than on the outer side; and lastly
4. It is cheaper to make than the graters hitherto in use.
All these advantages are attained by the peculiarity of form and construction in
this improved grater which may be made out of plain or corrugated tin-plate.
In the accompanying drawings
Figure 1 is a view of the improved grater made out of corrugated tin-plate;
Figure 2 is a section of the same on the line A B;
Figure 3 is a view of the same made out of flat tin-plate;
Figure 4 is a section thereof on the line C D ;
Figures 5 and 6 are cross sections of the die and matrix for the formation of the
improved grater out of corrugated tin-plate;
Figures 7 and 8 the corresponding appliances to be used with flat tin-plate.
Fig. 9 the rolls used for making the bent grater-frames.
As has already been stated the distinguishing characteristic of this improved
grater is that it has a grating surface on both sides. These are manufactured as
follows
1. GRATERS MADE OF CORRUGATED TIN-PLATE.
The appliances required for making these graters comprise a corrugating machine
of any suitable kind, well-known; the matrix (Fig. 5) and corresponding die
(Fig. 6); a multiplex punching machine of ordinary kind, for preparing the grating
surfaces; and the rolls (Fig. 9) for the manufacture of the bent grater-frames.
The tin-plate before passing into the corrugating machine, must be cut to the
required length, and then corrugated. The die a and matrix e are made of the
best steel, and have reciprocally corrugated surfaces exactly corresponding, in cross
section. The die a is fitted with pins b, to form the smaller teeth, and with orifices o
for the reception of similar pins d correspondingly set in the matrix e, which is also
similarly provided (besides the said pins d) with orifices f to receive the pins 6 of
the die.
The die and matrix are alike embedded in a cast-iron body-plate cast on them, as
shown at gh, in the drawing; and the cast-iron plate in the case of the die is made
with a flange on its base for facility of securing on the table of the stamping
machine, and in the case of the matrix with a tenoni by which it is attached to the
stamper.
The grater requires but a single stroke of the machine for its completion; whence
it is evident that the cost of production is reduced to a minimum. The perforated
tin-plates are then fitted into the frames, which have previously been shaped between
the rollsm Figure 9.
2. GRATERS MADE OF FLAT TIN-PLATE.
The manufacture of the improved graters of this kind is even more simple and
inexpensive than that of which the description has inst hean mirzan incomuch ea the

page_text: state of comminution substantially as hereinbefore described and illustrated in the
accompanying drawings.
2. The die and matrix specially devised for the production of the grater described
and claimed in Claim 1 whereof the former is fitted with pins or punches adapted
to make the smaller perforations and teeth and the latter is fitted with pins or
punches adapted to make the larger perforations and teeth or vice versa both die
and matrix being provided with orifices corresponding to the pins or punches in the
other respectively and further with iron-frame-plates cast upon them having
attachment devices whereby they may be secured to the table of a suitable stamping
or punching machine the whole substantially as hereinbefore described and
illustrated in the accompanying drawings.
Dated this 10th day of November 1893.
W. P. THOMPSON & BOULT,
Agents for the Applicant.