DE9007051U1 - Device for crushing cereal flakes - Google Patents

Description

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Dlpl.-lng.KMVUS WESTPHAU'"**: ' * · · *' yValdstaaM 33* Telefon(07721)56007

·...... .... .... Telex 7821573 wemud

Dr. rar, nat. BERND MUSSSNUS D-7730V&VHJJNGEN Fax (07721) 55164 Dr.rer.nat.OTTO BUCHNER Hossmannstrasse30a Telephone(089)832446 Telex 5213177 webu <J Patent Attorneys D-3000 MUNICH 60 Fax (089) 8340966 European Patent Attorney« * '

shnO72

Schnitzer GmbH & Co. KG
Feldbergstrasse 11
7742 St. Georgen

from

The invention relates to a device for crushing cereal flakes according to the preamble of claim 1.

A device of this type is known, for example, from DE-GM 87 03 777. This device has two rollers arranged parallel to the axis, at least one of which is rotatably driven. The two rollers are in contact with each other along a roller gap, so that grains can be crushed between these rollers to form grain flakes. The roller surfaces have a ribbing that facilitates the capture and crushing of the grains.

The rollers in these well-known devices are made of stainless steel. This makes the rollers complex in terms of material and processing. In addition, these rollers make the device heavy, which affects its handling as a simple kitchen appliance.

Postgiroamt: Karleruhe 76979-754 Ban|<j<pf)to:jppi4cho BinkjAÜVIIIIrtyen (bank code 69470039) 146332

The invention is based on the object of improving a device of the type known at the beginning in such a way that it is cheaper to manufacture and lighter in weight while maintaining the same quality.

r'.-^ee object is achieved according to the invention by the features , of the characterizing part of claim 1.

. Advantageous embodiments of the invention are specified in the subclaims.

In the device according to the invention, the rollers are made from a stone mass. The stone mass is significantly more cost-effective than using stainless steel. In addition, the weight of the device is significantly reduced.

The rollers can be made from a homogeneous natural stone. For cost reasons, however, it is preferred to cast the rollers from a malleable stone mass. Hard stone grains bound in magnesite or a ceramic material, preferably Naxos basalt, are particularly suitable for this. If necessary, the rollers can also be cast entirely from a homogeneous ceramic mass.

The rollers made of stone mass can be roped with a corrugation on their outer circumference, which facilitates the gripping of the grains. If the rollers consist of hard stone grains, in particular Naxos basalt grains, which are bound in a softer material such as magnesite, the somewhat stronger wear of this soft material leads to

The material used causes the hard stone grains to protrude slightly above the roller surface, so that the grains are easily caught by the rollers and drawn into the roller gap even without additional corrugation.

If crushing the grain between steel surfaces is preferred, the rollers made of stone mass, which are easy to manufacture, can still be used according to the invention. In this case, at least one stainless steel ring is simply pulled onto the surface of the rollers. The stainless steel rings are preferably shrunk onto the outer circumference of the rollers. The contacting surfaces of the stainless steel rings are preferably provided with a corrugation.

At least one of the rollers is driven by a hand crank or motor. Since the other roller cannot always be driven reliably by friction, the rollers are preferably connected to one another by metal gears. If the rollers are made of a cast stone mass, the gears can be cast into the rollers. Attaching the gears does not require any additional assembly work.

The invention is explained in more detail below using embodiments shown in the drawing. Show:

Figure 1 shows a vertical cross section through the rollers of a device according to the invention in a first embodiment,

Figure 2 is a plan view of the rollers of a device in a second embodiment and

Figure 3 shows a horizontal axial section of a roller of the embodiment of Figure 2

In the embodiment shown in Figure 1, the device has two rollers 10 cast from a stone mass consisting of hard stone grains, preferably Naxos basalt grains, bound in magnesite or a ceramic material. The cylindrical rollers 10 are cast on two axially parallel shafts 12 and are in contact with one another with axially parallel surface lines along a horizontal roller gap 14.

One of the rollers 10 can be driven via its shaft 12, while the other roller 10 is driven along. For this purpose, metal gears (not shown) connected to the rollers 10 engage with one another. The gears can be cast into the rollers 10. If necessary, the roller gap 14 can be adapted to the respective intended use by adjusting the distance between the shafts 12.

The embodiment of Figures 2 and 3 differs from the embodiment of Figure 1 in that the rollers 10 are not in direct contact with one another. A stainless steel ring 16 is shrunk or cast onto the outer circumference of the rollers 10. In order to reliably hold the shrunk stainless steel ring 16 onto the outer surface of the rollers 10, the outer surface of the rollers 10 preferably has a recess 18 into which the stainless steel

ring 16 engages, as shown in Figure 3.

As can also be seen from Figure 3, the shafts 12 preferably also have a recess 20 into which the stone face of the rollers 10 is cast in order to reliably fix the rollers 10 axially on the shafts 12.

In the embodiment of Figures 2 and 3, in which the rollers 10 are not in direct contact but with the stainless steel rings 16, the rollers preferably consist of a homogeneous ceramic material, since the stainless steel rings 16 with their corrugation and not the surface of the rollers 10 grasp and squeeze the grain kernels.

Claims (11)

DIpI.-Ing. KLAUS WESTPHAt .' ' ,' ,'.' .' WaMu^epeeO3 Telephone (07721) 56007 · '· ·· ·. .. Telex 7921S73wemud Or.rer.nat. BERND MUSSGNUG D-7730VS-V1LLINGEN Fax (07721) F 5164 Dr. rer. net. O T T O BUC H N ER Ftoesmanmrtrasse 30a leiefon (089)832446 - _k . - * _k . . -~ _ Telex 5213177 webu d PAjKNTA N w ä lte D-8000 MUNICH 60 Fax (089) 8340966 European Patent Attorney· shn072 PROTECTION CLAIMS 1. Device for crushing cereal flakes with two rollers that are parallel to the axis and are in contact with one another along a roller gap, preferably with a corrugation, characterized in that the rollers (10) consist of a stone mass. 2. Device according to claim 1, characterized in that the stone mass contains hard stone grains. 3. Device according to claim 2, characterized in that the stone grains consist of Naxos basalt. 4. Device according to claim 2 and/or 3, characterized in that the stone grains are bound in magnesite. 5. Device according to claim 2 and/or 3, characterized in that the stone grains are bound in a ceramic material. 6. Device according to claim 1, characterized in that the Postgiroamt Karlsruhe 76979-754 narid^|Deutson&BaÄilfAGVilingen(BLZ6947(»3«r 46332 Stone mass is a homogeneous ceramic material. 7. Device according to claim 1, characterized in that the stone mass is a homogeneous natural stone. 8. Device according to at least one of the preceding claims, characterized in that at least one stainless steel ring (16) is mounted on each of the rollers (IQ), the rollers (10) with these stainless steel rings (16) being in contact with one another. 9. Device according to claim 8, characterized in that the stainless steel rings (16) are shrunk onto the rollers (10) or cast into the rollers (10). 10. Device according to at least one of the preceding claims, characterized in that the rollers (10) are provided with metallic gears which engage with one another. 11. Device according to one of claims 4 to 6 and according to claim 10, characterized in that the gears are cast into the rollers (10).