Patents by Inventor Jan C. Tadema

Jan C. Tadema has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5297743
    Abstract: Chocolate is ground in order to obtain a very small average particle size. A determined viscosity is necessary for further processing. In order to keep as small as possible the fraction with particle size lying above the desired value and having an adverse effect on the taste of the final product, according to the invention the process mass is circulated in a cycle incorporating a grinding device and a ball mill. This has the result of accelerating the grinding process and reducing the inconsistency in the distribution of the particle size.
    Type: Grant
    Filed: July 2, 1992
    Date of Patent: March 29, 1994
    Assignee: Wiener & Co. Apparatenbouw B.V.
    Inventor: Jan C. Tadema
  • Patent number: 5156878
    Abstract: Chocolate is ground in order to obtain a very small average particle size. A determined viscosity is necessary for further processing. In order to keep as small as possible the fraction with particle size lying above the desired value and having an adverse effect on the taste of the final product, according to the invention the process mass is circulated in a cycle incorporating a grinding device and a ball mill. This has the result of accelerating the grinding process and reducing the inconsistency in the distribution of the particle size.
    Type: Grant
    Filed: December 28, 1990
    Date of Patent: October 20, 1992
    Assignee: Wiener & Co. Apparatenbouw B.V.
    Inventor: Jan C. Tadema
  • Patent number: 4878426
    Abstract: Chocolate is refined by so-called conching. This is carried out in a device whereby the mass is spread out in a thin film and exposed to the air. Among other things, the viscosity is reduced as a result. By subjecting the chocolate mass directly prior to the spreading in a thin film to high shear stresses, a further reduction in viscosity takes place. The invention provides a device wherein, directly preceding the spreading out in a film, the mass is subjected to high shear stresses by means of arranging radially directed pins on a drive shaft.
    Type: Grant
    Filed: June 1, 1988
    Date of Patent: November 7, 1989
    Assignee: Wiener & Co. Apparatenbouw B.V.
    Inventor: Jan C. Tadema
  • Patent number: 4380193
    Abstract: A device for treating a mixture for the manufacture of chocolate, said device comprising a cyclic course of a milling vessel and a mixing vessel each having a driving motor for driving the milling members and the mixing members respectively and means connected with the cycle for supplying the mixture to be treated and means for the delivery of the ready product provided with means for adding to the cycle a viscosity-reducing agent.
    Type: Grant
    Filed: February 25, 1981
    Date of Patent: April 19, 1983
    Assignee: Wiener & Co. B.V.
    Inventor: Jan C. Tadema
  • Patent number: 4221342
    Abstract: A device for processing rare earths with a grinding vessel having ball-shaped grinding bodies and an agitator for rotating the bodies, said vessel having a connection for the supply of liquid hexane andhaving near the bottom a tapping opening communicating with an evaporation vessel, said vessels having connections with a vacuum source and for the supply of rare gas, the evaporation vessel having an outlet for the ground product, and an outlet for the vaporlike products communicating with a condenser, the outlet of the condenser communicating through a control vessel and a hexane supply vessel with the inlet of the grinding vessel.
    Type: Grant
    Filed: October 18, 1978
    Date of Patent: September 9, 1980
    Assignee: Wiener & Co. B.V.
    Inventors: Jan C. Tadema, Hans-Gunter Domazer