Wilhelm Fette Gmbh

Firma Wilhelm Fette Gmbh

Fette Gmbh

Heinrich Behrmann

Ingo Schmidt

Ulrich Zeuschner

Jurgen Hinzpeter

Ulrich Arndt

J&uuml;rgen Hinzpeter

Thomas Heinrich

Hans-Joachim Pierags

Hans Wolf

Elke Wittenberg

Nils Petersen

Klaus-Peter Preuss

Jan Naeve

Harald Römer

Peter L&uuml;neburg

Thomas Jacob

Helmut Bommrowitz

Jorg Reitberger

Kurt Marquardt

Andreas Arning

Harald Roemer

J&uuml;rgen Schikowski

Wolfgang R&ouml;hrs

The present invention is related to a method for testing multilayer tablets in a multiple rotary press, in which die holes of a circulating die plate are successively filled with tablet material of different layers in succeeding filling devices, and the tablet material is compressed one layer after the foregoing layer into pressed articles having n layers by means of synchronously circulating compression punches, and the pressed articles are subsequently ejected in an unloading station and taken out, in which in a testing procedure, pressed articles with m layers are taken out after the compression in a respective unloading station and are conveyed to a testing station, wherein applies 1&#x3c;=m&#x3c;=n, wherein before taking out the pressed articles, at least the m-th layer is compressed more strongly than during the normal manufacture of the multilayer tablets, wherein applies m&#x3c;n. According to the present invention it is provided that only pressed articles of die holes are supplied to the testing station, which had been completely filled with the tablet material of the m-th layer already before the initiation of the testing procedure.

Method for testing multilayer tablets

A die for a rotary compression press, comprising a die holder axially supported in a guide bore and a die insert which is seated in the end-side bore of the die holder via a trunnion-shaped projection and is adapted to be mounted via releasable fastening means, wherein the projection is helically guided in the bore between axially spaced stops and is biased by a spring towards the associated front-end face of the die holder.

Die for a rotary compression press

A rotary compression press for cylindrical compacts, especially tablets, comprising a rotatably driven rotor including a die-plate and an upper and a lower ram guide for upper and lower rams cooperating with the die bores, and a pressure station with an upper and a lower pressure roller for applying a pressing power to the rams wherein the rams circumferentially have an annular tooth system which cooperates with an opposed tooth system in the area of a pressure station for the rams for the purpose of rotating the rams in the die bores thereof, characterized in that the opposed tooth system is defined by a rotatably supported gear which is acted on by a preset braking torque with the braking torque being chosen so as to be smaller than the torque of the ram when under a maximum pressing power.

Rotary compression press

A method of monitoring maximum pressing forces of a pelletizing machine provided with a rotatable matrix disc and plungers, involves the steps of supplying values corresponding to pressing forces applied by plungers for evaluation in a computer so as to control a deviating device, detecting a position of the matrix disc continuously by an angle pulse transmitter and releasing pulses by the latter to supply the pulses to the computer, and coordinating the pulses with predetermined maximum pressing force values and supplying to evaluation. The pelletizing machine has a rotatable matrix disc, plungers whose maximum pressing forces are supplied for evaluation, a computer to which the maximum pressing forces of the plungers are supplied for evaluation, and an angle pulse transmitter supplying pulses released by the matrix disc during its rotation into the computer for an association to measured maximum pressing forces.

Method of and arrangement for monitoring pressing forces in a

Arrangement for monitoring pressing forces in a pelletizing machine

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Schwarzenbek, Germany

Heinrich Behrmann