Roller mill for coffee
AssigneeBauermeister Zerkleinerungstechnik GmbH
InventorsWolfgang Holl, Gunter Simon
Life of this patent
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Abstract
The present invention relates to a roller mill for coffee, a method for grinding coffee, and an application of grinding rollers for grinding coffee. In order to grind coffee, conventionally metal rollers are used which are subject to heavy wear and adversely affect the taste of the coffee. The object of the invention is to provide a roller mill for coffee, a method of grinding coffee and a corresponding application thereof that avoids these disadvantages. This is achieved by means of a roller mill for coffee with grinding rollers in opposite directions and having granite surfaces at a peripheral velocity ratio of the rollers 1:1.5 to 1.4, and by means of a corresponding application and corresponding method.
Claims16
A roller mill for coffee for dry-grinding coffee, comprising:
- a. a first and second grinding roller arranged in parallel with one another and with a grinding gap placed therebetween for grinding coffee;
- and
- b. a driving device for driving the first and second grinding rollers in opposite directions at a peripheral velocity ratio of the rollers of 1:1.5 to 1:4,
- wherein the first and second grinding roller each comprise a surface made out of granite which is smooth and which does not comprise any engraved structures, and
- the surface of each of the first and second roller is roughened by a grinding process so as to give the surface of the first and second roller a certain roughness.
A method for dry-grinding coffee, comprising the following steps:
- a. providing a first grinding roller and a second grinding roller;
- b. arranging the first and second grinding rollers in parallel with a grinding gap between the first and second grinding rollers;
- c. driving the first and second grinding rollers in opposite directions with a peripheral velocity ratio of the rollers of 1:1.5 to 1:4;
- and
- d. feeding the coffee into the grinding gap,
- wherein the first and second grinding roller each comprise a surface made out of granite which is smooth and which does not comprise any engraved structures, and
- the surface of each of the first and second roller is roughened by a grinding process so as to give the surface of the first and second roller a certain roughness.
An application of a first and second grinding roller for grinding coffee arranged in parallel with one another and with a grinding gap placed therebetween, wherein the grinding rollers are driven in opposite directions with a peripheral velocity ratio of the rollers of 1:1.5 to 1:4, wherein the first and second grinding roller each comprise a surface made out of granite which is smooth and which does not comprise any engraved structures, and the surface of each of the first and second roller is roughened by a grinding process so as to give the surface of the first and second roller a certain roughness.
Dependencies are inferred from the claim text.