Abstract: A pressure roller unit for rotary presses, especially for preparing tablets, with a frame lockable at the rotary press and with two bearing blocks, which can be adjusted at the frame and carry the pressure rollers. To absorb stronger pressing forces and to extensively relieve the press frame of the pressing forces, the frame is formed from a guide column (1), and the bearing blocks (20) are arranged at upper and lower pressure roller mounts (2 and 3), which are guided by the guide column (1) and are adjustable in relation to one another.

Abstract: A rotary press, especially for preparing tablets, with a frame, a rotor with drive, at least one pressure roller unit, and a housing. To improve the absorption of the forces introduced into the pressure roller unit, of which there is at least one, and to design the rotary press as a low-vibration and low-noise press, a massive base plate (1) accommodating the rotor (2) with the drive and the pressure roller unit (3) is supported by the base frame (6) by elastic mounts (7). The rigidity of the elastic mounts (7) and the mass of the assembly unit formed by the rotor (2) with the drive and the pressure roller unit (3), of which there is at least one, are coordinated with one another such that the natural frequency of this vibration system in all six possible degrees of freedom is substantially lower than the lowest punch engagement frequency occurring at the lowest speed of rotation, which is the excitation frequency.

Abstract: A process for manufacturing head surfaces of dies cooperating with cylindrical press rolls for rotary presses. To avoid the high Hertzian stresses occurring dies for rotary presses during the interaction of the die head and the press roll, the present invention provides for designing instantaneous surface lines of the press roll extending through the instantaneous contact points between the head surface of the die head and the press roll under the action of the press roll on the die head as a set of continuously consecutive contact lines on the head surface of the die head by a tool.

Abstract: A process for checking the tablet parameters weight, height and hardness by weighing and measurement, and to a device for carrying out the process as an individual device and preferably as a rotary tabletting press for permanently complying with preset tablet parameters. A process and a device for rapid, reliable, reproducible, and distortion-proof checking of optionally all parameters or selected parameters on one tablet and the overall checking of the weight on a plurality of tablets are guaranteed. This is accomplished so as to carry out individual and/or overall checks with a receiving container (1) provided for tablets (2), and the receiving container (1) is connected to stations (3, 10, 11) for the optional determination of the weight, the height, and the hardness of a single tablet (2), and from the receiving container, an individual tablet 2 and/or a plurality of tablets (2) are fed fully automatically to and removed from the individual stations (3, 10, 11) for determining the tablet weight.

Abstract: A device for positioning in a mold table of a tabletting machine, in particular a rotary tabletting machine with facon molds that have molding cavities and form a circular cylinder on an outer perimeter. Each facon mold has at least one centering area associated with the molding cavity and for each facon mold, a centering piece is movably mounted on the mold table to engage the centering area of the facon mold. The centering area in cooperation with the centering piece properly positions the facon mold to the upper ram of the tabletting machine.

Abstract: A device for fixing the dies in the die table of a tabletting machine, especially of a rotary tabletting machine, using die holders. To make it possible to rapidly remove the old dies and to rapidly fix the new dies during the replacement of the dies for cleaning the machine, the die holders are arranged between the rotor axis and the pitch circle of the dies, and structure is provided for jointly moving the die holders on the die table.

Abstract: A process for quality control in tablet production by pressing by means of influencing the pressing force, the weight, the hardness, and the height of the tablets by means of a control mechanism. The task of the invention is to develop a process of the type according to this concept, according to which all necessary control mechanisms for maintaining a constant tablet weight, tablet height, and tablet hardness operate in such a way that a rapid control of deviations is assured, and according to which, the limiting values can be optimized automatically, is hereby resolved in that the control system is divided into several influential and essentially parallel running control circuits for the simultaneous control of the pressing force as well as the tablet parameters of weight, height, and hardness.

Abstract: A process for cleaning tabletting, pan-coating and granulating machines, especially rotary tabletting presses, with a treatment chamber including at least the rotor. To ensure the complete removal of the liquid residues from the treatment chamber and from the components left in the treatment chamber, especially of the rotor of a rotary tabletting press using small amounts of cleaning and rinsing liquids, a cleaning agent and a rinsing agent are sprayed within the treatment chamber and then drained off. All openings of the treatment chamber are then closed, and a vacuum of about 0.1 to 0.2 bar (absolute pressure) is generated within the sealed treatment chamber. The vacuum drains the residual liquid from all holes and joints of the rotor and from the treatment chamber.