Solid material comminution or disintegration – Processes – Miscellaneous
Reexamination Certificate
1999-09-14
2001-03-06
Rosenbaum, Mark (Department: 3725)
Solid material comminution or disintegration
Processes
Miscellaneous
C241S169100
Reexamination Certificate
active
06196481
ABSTRACT:
DESCRIPTION
1. Field of the Invention
The present invention relates to a grinding device for dried spices and herbs.
2. Background art
Various types of mills are known for pepper and other spices. In these devices, grinding is effected by friction between a fixed part and a movable part. The two parts have, on the respective contact surfaces, teeth or sharp-edged corrugations which are intended to grind the pepper grains by friction. In reality, said surfaces are not in contact, but are spaced so as to create between them an air gap which determines the final grain size of the ground material. Grinding is effected by rotating the movable part with respect to the fixed part, so that the pepper grains are “seized” between the teeth of the mill and are finely ground by the latter to the desired dimension.
This type of mill, however, requires the grains to be ground to be already of sufficiently small size and furthermore to be sufficiently hard so as not to form a compact mass which is difficult to grind. It is not therefore possible to use this type of mill to grind, for example, dried mushrooms, which are characterized by pieces which are frequently of considerable and non-uniform size and which furthermore often have a softness such as to form in the known mills a paste which is difficult to grind.
SUMMARY OF THE INVENTION
The present invention overcomes the problems of the prior art by providing a universal grinding device, suitable for grinding both pepper and other spices and dried food products such as, for example, dried mushrooms.
This result has been achieved by means of a grinding device comprising:
a movable member, rotating about an axis, which comprises a closure surface having a plurality of apertures and a grinding surface having a first and second series of ribs, the ribs of said second series having a pitch and a height which are less than those of the ribs of the said first series;
a fixed member, which comprises a complementary grinding surface having a first series of complementary ribs, at the level of the said first series of ribs, and a second series of complementary ribs, at the level of the said second series of ribs, the ribs of said second series of complementary ribs having a pitch and a height which are less than those of the ribs of said first series of complementary ribs.
REFERENCES:
patent: 2184719 (1939-12-01), Mantelet
patent: 3136491 (1964-06-01), Posmanter
patent: 4771955 (1988-09-01), Paulson
patent: 4960246 (1990-10-01), Fohrman
patent: 5088652 (1992-02-01), Chen
Drogheria E Alimentari S.r.l.
Rosenbaum Mark
Sheridan & Ross P.C.
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