Patents Assigned to Fette GmbH
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Patent number: 9821525Abstract: A compression punch for a rotary press, with a shaft, a punch head disposed at one shaft end and a compression zone disposed at the other shaft end, wherein the punch head features an upper mirror surface, an outer cylinder surface and a curved transition zone between the mirror surface and the cylinder surface, wherein the mirror surface and the transition zone form a three-dimensional surface, whose course in at least one radial direction can be described by a mathematical function whose second derivative is continuous.Type: GrantFiled: June 22, 2010Date of Patent: November 21, 2017Assignee: FETTE GMBHInventors: Friedrich Meissner, Stefan Luedemann, Jan Naeve
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Patent number: 8568630Abstract: A method for quality surveillance of powdered press material for a rotary press, in which the press material is fed from a reservoir via a preferably vertical feed channel to a filling device, which continuously fills dies of a rotor with press material wherein to the feed channel and/or the filling device is assigned a microwave resonator with an analysis unit, which measures the moisture and/or the density and/or the size of the granules of the press material, and at least one press variable of the microwave resonator is used for changing a control variable of the rotary press.Type: GrantFiled: September 24, 2009Date of Patent: October 29, 2013Assignee: Fette GmbHInventors: Rainer Herrmann, Udo Schlemm, Ingo Schmidt, Ulrich Arndt
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Patent number: 8525050Abstract: The 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 consecutive filling devices, and the tablet material is compressed layer after layer to pressed articles having n layers by means of synchronously circulating compression punches in compression stations respectively associated to the filling devices, and the pressed articles are subsequently ejected and unloaded in a unloading station.Type: GrantFiled: September 9, 2009Date of Patent: September 3, 2013Assignee: Fette GmbHInventors: Jan Naeve, Stefan Luedemann
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Patent number: 8490529Abstract: A compression punch for a rotary press, with a punch shaft that has a punch head at its one end and means for accommodating a separate punch insert at the other end, and with fastening means for detachably fastening the punch insert on the punch shaft, wherein the punch head and the punch shaft have an axial through bore, the axial through bore accommodates a drawbar that has a tensioning head at the end turned away from the punch head, said tensioning head having at least one connection portion, the punch insert has a recess at the end facing the punch shaft which is realized to be detachably connectable with the connection portion, and that tensioning means are arranged in the axial through bore, by which the drawbar can be tensioned in the direction of the punch head.Type: GrantFiled: October 23, 2009Date of Patent: July 23, 2013Assignee: Fette GmbHInventors: Friedrich Meissner, Daniel Malick
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Patent number: 8453565Abstract: A pressing station in a rotary press having a bearing component for a compression roll that can be adjusted vertically in height along a guide attached to the frame of the rotary press, a first adjustment drive fastened to the frame, which is coupled via an adjustment drive to the bearing component for height adjustment of the bearing component, wherein a shaft or axle for the compression roll or the bearing component or a part of these is coupled to a second adjustment drive in such a way that the compression roll can be adjusted in its height independently from the first adjustment drive.Type: GrantFiled: March 31, 2010Date of Patent: June 4, 2013Assignee: Fette GmbHInventors: Stefan Luedemann, Kurt Marquardt, Jan Naeve
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Patent number: 8454868Abstract: 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<=m<=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<n.Type: GrantFiled: December 4, 2008Date of Patent: June 4, 2013Assignee: Fette GmbHInventors: Harald Roemer, Jan Naeve, Heinrich Behrmann, Kurt Marquardt
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Patent number: 8382465Abstract: The invention relates to an apparatus for test pressing tablets with at least two layers.Type: GrantFiled: February 3, 2012Date of Patent: February 26, 2013Assignee: Fette GmbHInventors: Ingo Schmidt, Ulrich Gathmann, Bernd Malner
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Patent number: 8349474Abstract: The invention relates to a hob cutter tool with a coating, wherein the coating is produced by a physical vapor deposition method, in which in a coating chamber in an atmosphere containing nitrogen, an arc discharge is generated in each case between at least one anode and at least one pure Al cathode on the one hand, and at least one pure Cr cathode on the other hand, and in this way, Al and Cr are vaporized from the cathode, in which the hob cutter tool to be coated is rotated in the coating chamber, wherein the tool is subsequently guided past the at least two cathodes, and in which the vaporized Al and Cr is deposited in atomic or ionized form together with nitrogen from the atmosphere containing nitrogen onto the hob cutter tool led rotating past the cathodes.Type: GrantFiled: August 18, 2009Date of Patent: January 8, 2013Assignee: Fette GmbHInventors: Marcus Morstein, Tibor Cselle, Andreas Lumkemann, Jorn Kohlscheen
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Patent number: 8337741Abstract: A method for operating a rotary press, comprising a rotor rotatably driven about a vertical axis that has a die-plate and upper and lower rams which, while being guided vertically in guides of the rotor, interact with holes of dies in the die-plate wherein at least one compression station is provided and has an upper and a lower pressing roller past which the presser rams run along and by which they are moved towards the die-bore for the purpose of compacting the material in the die-hole, wherein the upper and lower rams are lifted subsequent to the compression procedure, causing the lower ram to eject a compact from the die and the compact to be stripped by a stripper in the direction of a discharge chute, characterized in that while an compact ejection procedure is under way the upper ram stands upright on top of the compact and is lifted therewith and the stripper seizes the compact laterally while the upper ram is still standing upright on top of the compact.Type: GrantFiled: April 25, 2006Date of Patent: December 25, 2012Assignee: Fette GmbHInventors: Harald Romer, Ulrich Zeuschner, Ingo Schmidt, Thorsten Ehrich, Kurt Marquardt
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Patent number: 8250893Abstract: A knurling tool, with a base body featuring an axis and adapted to be clamped into a machine tool, which accommodates a holder and knurling wheels rotatably mounted in the holder, wherein knurling wheels arranged at equal circumferential distances are mounted in the holder around a wheel axis which embraces a first angle ?1 with respect to the supporting axis, wherein a workpiece cone is insertable between the knurling wheels along the supporting axis and the knurling wheels embrace a second cone angle ?2, wherein the holder features three segments, each of which mounting one knurling wheel via a bearing pin, an adjustment device is provided by which the segments, being guided radially, are radially adjustable synchronously about a certain amount, and fixing means are provided which fix the adjustment device and the segments, respectively, in an occupied position.Type: GrantFiled: March 20, 2009Date of Patent: August 28, 2012Assignee: Fette GmbHInventors: Frank Richter, Wolfgang Hahn
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Publication number: 20120195992Abstract: The invention relates to an apparatus for test pressing tablets with at least two lavers.Type: ApplicationFiled: February 3, 2012Publication date: August 2, 2012Applicant: FETTE GMBHInventors: Ingo Schmidt, Ulrich Gathmann, Bernd Malner
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Patent number: 8191390Abstract: Radial roller head with rollers distributively arranged in a holder under the same angular separations and in axial separations around a roller axis, the roller surfaces of which have an increasing progression in a spiral manner around the circumference in the counter clockwise direction. A gear wheel drive couples the rollers together. A locking device automatically locks into place after each full roller rotation and is released before each roller procedure via a moveable locking element. A drive device turns the rollers after release of the locking device up to the contact of the roller surfaces with a tool, in order to then be further turned through friction therewith. An electromagnet connected with the locking element, is arranged in the radial roller head with an electrical energy source and a switch connecting the energy source with the electromagnets when the switch is actuated via the work piece or another actuating device.Type: GrantFiled: July 3, 2008Date of Patent: June 5, 2012Assignee: Fette GmbHInventors: Jakob Graf, Dirk Marbs, Roland Woehl, Detlef Adam
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Patent number: 8186988Abstract: A powder press, with a press frame, which comprises an upper and lower frame section, an upper linear drive attached to the upper frame section and a lower linear drive attached to the lower frame section, wherein the drives are connected to an upper and lower punch plate or a die table, respectively, wherein the punch plates have a clamping system for an upper or a lower punch, a die clamping system on a die table with a die, and at least one force measuring device for measuring the pressing force on at least one punch, characterized in that at least one force measuring device is disposed between a punch plate and the associated clamping system.Type: GrantFiled: June 26, 2009Date of Patent: May 29, 2012Assignee: Fette GmbHInventors: Udo Baltruschat, Stephan Mallon, Harald Römer, Jan Naeve, Ingo Schmidt
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Patent number: 8186032Abstract: Tool arrangement for the production of helical teeth in gear wheels, wherein a roughing hob (20), at least one deburring cutter (16, 18) and a finishing hob (12) can be fastened on a common mandrel (14) in a predetermined rotational position relative to one another, and the teeth of the finishing hob, which are situated along a helical line, each have a different cross section such that the engagement angle of the right or left flanks decreases continuously starting from a maximum value of the first tooth up to the last tooth, and the maximum engagement angle of the right flanks of the first or last tooth coincides with the minimum engagement angle of the left flanks, and vice versa.Type: GrantFiled: September 6, 2006Date of Patent: May 29, 2012Assignees: Liebherr-Verzahntechnik GmbH, Fette GmbHInventors: Wolfgang Carmincke, Oliver Winkel
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Patent number: 8162650Abstract: A filling apparatus for a rotary tablet press, which itself being arranged stationarily is associated to a circulating die plate of a rotor of the tablet press, with a filling chamber, which features an upper inlet opening for powder-shaped compression material and a filling opening aligned with die bores of the die plate, and with a conveying means in the filling chamber driven by a drive motor, wherein the filling chamber is circular, one single disc-shaped filling wheel is rotatably mounted around a vertical axis in the filling chamber, which has plural wings on the perimeter, spaced apart in the perimeter direction, which sweep over the filling opening upon rotation of the filling wheel, and the inlet opening is arranged in a distance above the filling wheel, preferably approximately centered with the axis of the filling wheel.Type: GrantFiled: November 3, 2008Date of Patent: April 24, 2012Assignee: Fette GmbHInventors: Harald Roemer, Jan Naeve, Matthias Dederichs, Wolfgang Soltau, Ulrich Arndt
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Patent number: 8137089Abstract: A punch for a rotary press, which has a shaft and a head, wherein the head has an upper mirror surface, a cylinder surface and a rounded transition area between the mirror surface and cylinder surface with a first and a second radius, wherein the first radius is larger than the second radius and wherein the punch head also has a preferably conical transition area from the cylinder surface to the shaft, wherein the diameter of the head is less than 25 mm and the first radius of the transition area is selected such that its height is less than half the height of the cylinder surface.Type: GrantFiled: April 2, 2009Date of Patent: March 20, 2012Assignee: Fette GmbHInventors: Jürgen Schikowski, Friedrich Meissner, Jan Naeve, Harald Römer, Reinhard Wagner
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Patent number: 8119045Abstract: The invention relates to a method for test pressing tablets with at least two layers.Type: GrantFiled: February 13, 2006Date of Patent: February 21, 2012Assignee: Fette GmbHInventors: Ingo Schmidt, Ulrich Gathmann, Bernd Malner
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Patent number: 8096801Abstract: A rotary press, with a rotor rotatingly drivable around a vertical axis, which features a die plate having die bores on a partial circle and upper and lower punches guided in guiding devices, radial cams for the upper and lower punches, at least two compression stations spaced apart in the circumferential direction and with an upper and a lower compression roller, a first filling device in the circumferential direction of a first compression station and a second filling device located behind the first compression station in the circumferential direction, wherein the rotor features an annular surface in a radial distance to the partial circle for the die bores and being concentric to the rotational axis of the rotor, wherein first deflecting means are provided between the second compression station and the first filling device that direct the ejected pressed articles towards the annular surface, second deflecting means are provided that direct the pressed articles from the annular surface towards off from theType: GrantFiled: May 11, 2010Date of Patent: January 17, 2012Assignee: Fette GmbHInventors: Sven Kolbe, Gernot Pohl, Dirk Peters
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Patent number: 8002537Abstract: System for the production of preforms made of a powder material, in particular tablets, with a rotary tablet press, which is arranged in a housing supported by a frame in the housing, wherein an electric drive motor is integrated into the rotor of the tablet press and the rotor is swivel-mounted on a middle column of the frame, and a control cabinet for the tablet press, which contains among other things a machine computer for the operation of the tablet press, wherein the middle column is supported on a horizontal load-bearing element, which is arranged at a distance above a base plate placed on the floor and the control cabinet is arranged in the interim space between the horizontal load-bearing element and the base plate.Type: GrantFiled: July 18, 2008Date of Patent: August 23, 2011Assignee: FETTE GmbHInventors: Werner Seifert, Ingo Schmidt, Joachim Greve, Alexander Oldenburg
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Patent number: 7988440Abstract: The present invention is related to an apparatus and a method for the measurement of the vertical position of upper and lower punches, pairwisely associated to a rotatably driven rotor of a rotary tablet press and rotating synchronously with the rotor, which perform a vertical movement in certain regions along the circumference of their rotational movement during a rotation of the rotor. The apparatus features at least one scale arranged on at least one of the upper and/or lower punches, running in parallel to the vertical movement direction of the respective upper and/or lower punch, and at least one reading device associated to the scale, also rotating synchronously with the rotor, by means of which a vertical position of the respective upper and/or lower punch can be measured by reading out the scale. The inventions is furthermore related to a corresponding rotary tablet press and a corresponding method.Type: GrantFiled: March 20, 2009Date of Patent: August 2, 2011Assignee: Fette GmbHInventors: Ingo Schmidt, Keno Freyer, Werner Seifert, Wolfram Lämmerhirt