Patents by Inventor Stefan Luedemann

Stefan Luedemann 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: 11707435
    Abstract: A tablet press comprises a gate and a control apparatus configured to generate a switching signal. A drive apparatus is configured to move the gate in response to the switching signal received from the control apparatus between a first switching position and at least a second switching position. At least one sensor is configured to generate a detection signal when the gate reaches one of the switching positions. The control apparatus receives the detection signal and is configured to output a switching signal to the drive apparatus to at least partially move the gate back into a home position when there is a switching signal to move the gate out of the home position and there is no detection signal received from the at least one sensor. The control apparatus subsequently outputs a switching signal to again move the gate out of the home position to a target position.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: July 25, 2023
    Assignee: Fette Compacting GmbH
    Inventors: Friedrich Meissner, Stefan Luedemann
  • Publication number: 20230084898
    Abstract: A filling apparatus for filling cavities of a rotary press includes a filling chamber defining an inlet opening through which filling material enters the filling chamber and an outlet opening through which filling material exits into the cavities of the rotary press. A conveyor wheel is positioned in the filling chamber and defines a plurality of conveyor pockets structured to receive the filing material. The conveyor wheel is rotatable relative to the filling chamber about an axis of rotation arranged at an angle (?) to a vertical axis. The plurality of conveyor pockets are arranged along a circular path and are rotated along the inlet opening and along the outlet opening when the conveyor wheel is rotated about the axis of rotation. The filling material received in each of the plurality of the plurality of conveyor pockets is conveyed from the inlet opening to the outlet opening.
    Type: Application
    Filed: September 7, 2022
    Publication date: March 16, 2023
    Applicant: Fette Compacting GmbH
    Inventors: Jan Naeve, Stefan Lüdemann, Sven Kolbe, Frank Schade
  • Patent number: 11464743
    Abstract: A tablet press comprises a gate that defines a first switching position that feeds tablets into a first tablet outlet and at least a second switching position that feeds tablets into at least one second tablet outlet. The table press further comprises a control apparatus and a drive apparatus. The drive apparatus is configured to be actuated by the control apparatus to move the gate from a home position defined as one of the first switching position and the at least a second switching position into a target position defined as a switching position that is not the home position. The gate is moved from the home switching position at a speed of movement toward the target position such that the speed of movement of the gate is reduced before the target position is reached.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: October 11, 2022
    Assignee: Fette Compacting GmbH
    Inventors: Friedrich Meissner, Stefan Luedemann
  • Patent number: 11267215
    Abstract: A tablet discharge gate for a tablet press comprises a tablet channel having an inlet and an outlet and comprising one of a tube shape and a trough shape, a first outlet channel, and a second outlet channel. A gate chamber is positioned between the outlet of the tablet channel and the first and second outlet channels. A drive apparatus is configured to move the tablet discharge gate between a first position in which tablets are supplied from the tablet channel to the gate chamber and into the first outlet channel of the gate, and a second position in which tablets are supplied to the tablet discharge gate chamber and into the second outlet channel.
    Type: Grant
    Filed: July 16, 2019
    Date of Patent: March 8, 2022
    Assignee: Fette Compacting GmbH
    Inventors: Sven Kolbe, Stefan Mallon, Friedrich Meissner, Jan Naeve, Stefan Luedemann
  • Publication number: 20210370632
    Abstract: A discharge apparatus for discharging pellets from a rotary press comprises an inlet channel configured to receive pellets from an ejection apparatus of the rotary press, a first discharge channel connected to the inlet channel, and a second discharge channel connected to the inlet channel. A gate is positioned between the inlet channel and the first and second discharge channels. The gate is configured to be shifted between a first position, in which pellets are directed from the inlet channel into the first discharge channel, and a second position, in which pellets are directed from the inlet channel into the second discharge channel. A pressure equalization channel configured to open into one of the first and second discharge channels and is configured to equalize a pressure between the inlet channel and at least one of the first and second discharge channels.
    Type: Application
    Filed: May 28, 2021
    Publication date: December 2, 2021
    Applicant: Fette Compacting GmbH
    Inventors: Stefan Luedemann, Friedrich Meissner
  • Patent number: 11020928
    Abstract: A removal apparatus for removing pellets from a die plate of a rotary press comprises a housing and a first channel positioned on the housing and configured to receive pellets removed from the die plate. A guide element is arranged on the housing and positioned over the die plate. The guide element is configured to guide pellets produced in the rotary press from the die plate into the first channel. The guide element and the first channel are moveably mounted on the housing. A plurality of mechanical positioning elements are configured to be alternatively inserted into the housing and cooperate with the guide element and the first channel to movably position the guide element and the first channel relative to the housing. Each of the mechanical positioning elements defines a different position of one of the guide element and the first channel relative to the housing.
    Type: Grant
    Filed: April 3, 2020
    Date of Patent: June 1, 2021
    Assignee: Fette Compacting GmbH
    Inventors: Sven Kolbe, Stefan Luedemann
  • Publication number: 20200316895
    Abstract: A removal apparatus for removing pellets from a die plate of a rotary press comprises a housing and a first channel positioned on the housing and configured to receive pellets removed from the die plate. A guide element is arranged on the housing and positioned over the die plate. The guide element is configured to guide pellets produced in the rotary press from the die plate into the first channel The guide element and the first channel are moveably mounted on the housing. A plurality of mechanical positioning elements are configured to be alternatively inserted into the housing and cooperate with the guide element and the first channel to movably position the guide element and the first channel relative to the housing. Each of the mechanical positioning elements defines a different position of one of the guide element and the first channel relative to the housing.
    Type: Application
    Filed: April 3, 2020
    Publication date: October 8, 2020
    Applicant: Fette Compacting GmbH
    Inventors: Sven Kolbe, Stefan Luedemann
  • Publication number: 20200023602
    Abstract: A tablet discharge gate for a tablet press comprises a tablet channel having an inlet and an outlet and comprising one of a tube shape and a trough shape, a first outlet channel, and a second outlet channel. A gate chamber is positioned between the outlet of the tablet channel and the first and second outlet channels. A drive apparatus is configured to move the tablet discharge gate between a first position in which tablets are supplied from the tablet channel to the gate chamber and into the first outlet channel of the gate, and a second position in which tablets are supplied to the tablet discharge gate chamber and into the second outlet channel.
    Type: Application
    Filed: July 16, 2019
    Publication date: January 23, 2020
    Applicant: Fette Compacting GmbH
    Inventors: Sven Kolbe, Stefan Mallon, Friedrich Meissner, Jan Naeve, Stefan Luedemann
  • Publication number: 20200009058
    Abstract: A tablet press comprises a gate and a control apparatus configured to generate a switching signal. A drive apparatus is configured to move the gate in response to the switching signal received from the control apparatus between a first switching position and at least a second switching position. At least one sensor is configured to generate a detection signal when the gate reaches one of the switching positions. The control apparatus receives the detection signal and is configured to output a switching signal to the drive apparatus to at least partially move the gate back into a home position when there is a switching signal to move the gate out of the home position and there is no detection signal received from the at least one sensor. The control apparatus subsequently outputs a switching signal to again move the gate out of the home position to a target position.
    Type: Application
    Filed: July 1, 2019
    Publication date: January 9, 2020
    Applicant: Fette Compacting GmbH
    Inventors: Friedrich Meissner, Stefan Luedemann
  • Publication number: 20200009057
    Abstract: A tablet press comprises a gate that defines a first switching position that feeds tablets into a first tablet outlet and at least a second switching position that feeds tablets into at least one second tablet outlet. The table press further comprises a control apparatus and a drive apparatus. The drive apparatus is configured to be actuated by the control apparatus to move the gate from a home position defined as one of the first switching position and the at least a second switching position into a target position defined as a switching position that is not the home position. The gate is moved from the home switching position at a speed of movement toward the target position such that the speed of movement of the gate is reduced before the target position is reached.
    Type: Application
    Filed: July 1, 2019
    Publication date: January 9, 2020
    Applicant: Fette Compacting GmbH
    Inventors: Friedrich Meissner, Stefan Luedemann
  • Patent number: 10343363
    Abstract: A punch for a rotary press comprises a shaft with a punch tip at a first end of the shaft and a punch head at the second end of the shaft. The punch head further comprises a mirror surface and a cylindrical surface, as well as intermediate region between the mirror surface and cylindrical surface. The mirror surface defining a central recess surrounded by an annular mirror surface section.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: July 9, 2019
    Assignee: Fette Engineering GmbH
    Inventors: Thomas Heinrich, Stefan Luedemann
  • Patent number: 10195771
    Abstract: The invention relates to a rotary press with a rotor, whereby the rotor comprises one upper and one lower punch guide and a die plate between the upper and lower punch guides, furthermore with upper and lower press punches which interact with the die holes in the die plate, whereby the rotary press comprises several stations, namely at least one filling station in which the material to be pressed is filled into the die holes, at least one dosing station, in which the material filled into the die holes is dosed, at least one pressing station, in which the material that has been dosed and filled into the die holes is pressed through the upper and lower press punches into pellets, and at least one ejector station in which the pressed pellets are ejected, whereby at least one of the stations can be moved from its operating position to a resting position, in which the production process of the rotary press to produce pellets remains possible with the remaining stations in their respective operating positions, and
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: February 5, 2019
    Assignee: FETTE COMPACTING GMBH
    Inventors: Stefan Lüdemann, Daniel Malick, Kai Hübner
  • Patent number: 9996073
    Abstract: A method for operating a plant to produce tablets that has at least one rotary press and one computer system, wherein the computer system contains operating and control software for controlling and monitoring the operation of the rotary press, and wherein the rotary press is designed for installing different types of rotors, wherein a record adapted to the respective rotor type is saved in a memory and communication component on the rotors, and before the rotor type is initially operated, the record is read out and is saved in the computer system to automatically adapt the operating and control software and user interface to the rotor type.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: June 12, 2018
    Assignee: FETTE COMPACTING GMBH
    Inventors: Stefan Lüdemann, Matthias Meier
  • Patent number: 9981440
    Abstract: A rotor for a rotary press comprising a die plate having die bores and upper punches and lower punches assigned in pairs to the die bores, circulating synchronously with the die plate An upper punch receiver is configured to axially guide the upper punches and a lower punch receiver is configured to axially guide the lower punches. An upper control cam is configured to control the axial movement of the upper punches passing through the upper control cam and a lower control cam is configured to control the axial movement of the lower punches passing through the lower control cam.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: May 29, 2018
    Assignee: Fette Compacting GmbH
    Inventor: Stefan Luedemann
  • Publication number: 20180029323
    Abstract: A punch for a rotary press comprises a shaft with a punch tip at a first end of the shaft and a punch head at the second end of the shaft. The punch head further comprises a mirror surface and a cylindrical surface, as well as intermediate region between the mirror surface and cylindrical surface. The mirror surface defining a central recess surrounded by an annular mirror surface section.
    Type: Application
    Filed: July 26, 2017
    Publication date: February 1, 2018
    Inventors: Thomas Heinrich, Stefan Luedemann
  • Patent number: 9821525
    Abstract: 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: Grant
    Filed: June 22, 2010
    Date of Patent: November 21, 2017
    Assignee: FETTE GMBH
    Inventors: Friedrich Meissner, Stefan Luedemann, Jan Naeve
  • Publication number: 20160303816
    Abstract: A rotor for a rotary press comprising a die plate having die bores and upper punches and lower punches assigned in pairs to the die bores, circulating synchronously with the die plate An upper punch receiver is configured to axially guide the upper punches and a lower punch receiver is configured to axially guide the lower punches. An upper control cam is configured to control the axial movement of the upper punches passing through the upper control cam and a lower control cam is configured to control the axial movement of the lower punches passing through the lower control cam.
    Type: Application
    Filed: April 15, 2016
    Publication date: October 20, 2016
    Inventor: Stefan Luedemann
  • Patent number: 9144873
    Abstract: The invention relates to a coding element for equipping at least one cam carrier of a rotor of a rotary press with at least one control cam element, wherein at least one coding element is provided, wherein the at least one coding element comprises fastening means by which it can be fastened to the rotor or a component connected thereto, wherein the at least one coding element has coding means by which the position of the at least one control cam element on the cam carrier is clearly specified. In addition, the invention relates to a corresponding method.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: September 29, 2015
    Assignee: Fette Compacting GmbH
    Inventors: Stefan Lüdemann, Peter Lüneburg, Daniel Malick
  • Patent number: 8801420
    Abstract: A die plate for the rotor of a rotary tablet press comprising a plurality of die holes, with dies provided therein, arranged distributed in the circumferential direction of the die plate, and between every two adjacent die holes radially running bores, in each of which a fastening device is disposed for fastening the dies, characterized in that at least one fastening device comprises two clamping elements disposed opposite each other in a radial bore, and a tensioning device, wherein the clamping elements can be tensioned against each other in the radial direction using the tensioning device, wherein the clamping elements are pressed against the dies adjacent to the radial bore.
    Type: Grant
    Filed: March 1, 2011
    Date of Patent: August 12, 2014
    Assignee: Fette Compacting GmbH
    Inventors: Friedrich Meissner, Stefan Luedemann
  • Publication number: 20140195036
    Abstract: A method for operating a plant to produce tablets that has at least one rotary press and one computer system, wherein the computer system contains operating and control software for controlling and monitoring the operation of the rotary press, and wherein the rotary press is designed for installing different types of rotors, wherein a record adapted to the respective rotor type is saved in a memory and communication component on the rotors, and before the rotor type is initially operated, the record is read out and is saved in the computer system to automatically adapt the operating and control software and user interface to the rotor type.
    Type: Application
    Filed: April 19, 2012
    Publication date: July 10, 2014
    Applicant: FETTE COMPACTING GMBH
    Inventors: Stefan Lüdemann, Matthias Meier