Solid material comminution or disintegration – Apparatus – Rotating comminuting surface
Reexamination Certificate
2001-02-12
2001-10-09
Simone, Timothy F. (Department: 1761)
Solid material comminution or disintegration
Apparatus
Rotating comminuting surface
C099S492000, C099S509000, C099S510000, C241S037500, C241S101200, C241S199120, C366S314000
Reexamination Certificate
active
06299085
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a cutting device for food processors of the kind in which the processor is designed as a cutting machine for cutting or chopping the raw foodstuffs to be prepared.
2. Description of the Related Art
Machines of this kind are available in designs for use in industrial kitchens and also in designs for domestic use.
A common feature of the machines is that they include a container which is fitted with a lid that has an infeed opening which allows raw foodstuffs to be inserted into the container while the machine is in operation. A tubular member which accommodates a driven shaft extends up from the bottom of the container. A cutting device is non-rotatably fitted to the shaft. The cutting device also includes a sleeve-like central part which runs on the outside of the upstanding tubular member and which carries the cutting tool at its lower end. The cutting tool may consist of one or more knives that extend radially outwards from the sleeve. The container is held stationary while the cutting device rotates, when the machine is in use.
One problem with food processors of this kind is that certain types of ingredients to be processed by the knives tend to fasten to the outer surface of said central part, causing the mass of ingredients to rotate together therewith.
An example of such agglomerated masses is found in different types of meat that are to be chopped or cut with the aid of the knives. For instance, meat that is minced tends to form a ball that sticks firmly to the outer surfaces of the central part and to the inner surface of the container. Consequently, the ball will only rotate around a horizontal axis to a relatively small extent.
This poor rotation of the ball means that the meat will be cut unevenly, while poor rotation of the meat about a horizontal axis will means that the knives will cut through meat that has already been cut, causing a local increase in meat temperature, which is highly disadvantageous with respect to the quality of the food prepared.
The same problem occurs with other types of food masses that can form a more or less sticky ball, such as fish mince, dough, etc.
Another problem is that when such food processors are used to produce puree, mash, soup and like foods, there is insufficient vertical flow of the foodstuff in the container.
Another problem with such food processors is that certain liquid products are filled to a level in the container above the orifice of the tubular member upstanding from the bottom of the container. As a result the liquid food product rises up in the space between the outer surface of the upstanding tubular member and the inner surface of the central part and runs down in the space between the upstanding tubular member and the drive shaft. The food product then runs out through the lower orifice of the upstanding tubular member and thus out beneath the container. As a result of the siphoning effect that occurs, most of the food product will run out of the container along this path unless the processor is stopped and the container lifted-off.
The present invention solves these problems.
SUMMARY OF THE INVENTION
The present invention thus relates to a cutting device for food processors of the kind where the processor is a cutting machine for cutting or chopping raw foodstuffs to be processed. The machine includes a container which is fitted with a lid and which is stationary during operation of the machine. A tubular member extends up from the container bottom, and a driven shaft extends through said tubular member. A cutting device is non-rotatably mounted on said shaft and includes a sleeve-like central part on the outside of the outwardly extending tubular member that carries said cutting tool at its lower end. The tool includes one or more knives that extend radially outwards from the sleeve. The cutting device includes a first pair of knives placed radially on opposite sides of the central part and close to the bottom thereof, and at least one second knife which projects radially outwards from said central part than the first pair of knives. The second knife has a shorter cutting blade than the first pair of knives.
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AB Hallde Maskiner
Mangels Alfred J.
Simone Timothy F.
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