Patents Assigned to Maschinenfabrik Rieter AG
  • Patent number: 11352720
    Abstract: A device for contactless measurement of one or more parameters of a linear textile formation (e.g., yarn) includes a yarn sensor with at least two mutually independent detection zones for one or a combination of the parameters of yarn presence, yarn movement, or yarn quality. The individual detections zones are arranged in defined positions relative to at least two different yarn paths of the yarn at a workstation depending on changed states of the yarn at the workstation so that at least one of the parameters is measured in each of the detections zones.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: June 7, 2022
    Assignee: Maschinenfabrik Rieter AG
    Inventors: Evzen Pilar, Bernd Bahlmann
  • Patent number: 11248315
    Abstract: A method for operating a spinning machine that has a plurality of adjacently arranged workstations and at least one trash conveying unit that transports trash accumulating at the workstations to at least one receiving unit includes discontinuously driving the trash conveying unit during operation of the spinning machine.
    Type: Grant
    Filed: October 21, 2019
    Date of Patent: February 15, 2022
    Assignee: Maschinenfabrik Rieter AG
    Inventors: Adalbert Stephan, Martin Zipperer
  • Patent number: 11111102
    Abstract: A sliver can for accommodating a strand-shaped fiber material includes a can base and a peripheral side wall that delimits an accommodating space for the fiber material, the peripheral side wall at least partially transparent. A display element that transmits a signal indicating one or both of a quantity or a property of the fiber material is located in the sliver can and is configured within the sliver can such that the signal is visible through the peripheral side wall from outside the accommodating space. The invention also encompasses a sliver can base configured with the display element and a spinning mill machine in combination with the sliver can.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: September 7, 2021
    Assignee: Maschinenfabrik Rieter AG
    Inventors: Werner Schmolke, Markus Hillerbrand
  • Patent number: 11091854
    Abstract: A method is provided for operating a textile machine having a plurality of identical workstations wherein, during a normal operation of the workstations, yarn is produced or rewound from a supply bobbin onto a receiving bobbin at the workstations. After a stoppage at a plurality of the work stations, the method includes starting and setting the plurality of workstation into a normal operating mode. The method includes dividing the plurality of workstations into groups of workstations, and starting up the groups of workstations at different predefined times, such as predefined waiting times between consecutive groups of the work stations.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: August 17, 2021
    Assignee: Maschinenfabrik Rieter AG
    Inventor: Adalbert Stephan
  • Patent number: 11078605
    Abstract: A method is provided for operating a spinning machine or winder that includes a plurality of same-kind workstations and a plurality of input terminals situated with the workstations. The method includes at least intermittently configuring at least one of the input terminals as a master terminal. Commands are entered for operation of all or a group of the workstations via the master terminal. Designation of the master terminal is changed to one or more different ones of the input terminals at different points in time. A spinning machine or winder that practices the method is also provided.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: August 3, 2021
    Assignee: Maschinenfabrik Rieter AG
    Inventors: Bernd Bahlmann, Franz Huettinger
  • Patent number: 11078603
    Abstract: A method for controlling a display on a spinning machine or winder having a plurality of same-kind workstations and a plurality of displays includes assigning one of the displays to at least two of the workstations, wherein each display includes a display area. During normal operation of the workstations, information regarding the individual workstations assigned to the particular display is simultaneously displayed in respective subareas of the display area. When required by changed operating states at the work stations, a surface area of the subareas is changed to display information regarding at least one of the workstations on a larger subarea. An associated spinning machine or winder is also provided.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: August 3, 2021
    Assignee: Maschinenfabrik Rieter AG
    Inventors: Bernd Bahlmann, Mario Maleck, Franz Huettinger
  • Patent number: 11078604
    Abstract: A textile machine and associated method are provided for operating the textile machine that includes a plurality of workstations, wherein each workstation includes at least one stepper motor configured to drive an element at the workstation. The method includes measuring a load variable, for example a load angle, of the stepper motor and detecting an approach of the element to an end position based on changes to the load variable.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: August 3, 2021
    Assignee: Maschinenfabrik Rieter AG
    Inventors: Mario Maleck, Robin Wein
  • Patent number: 11035057
    Abstract: A cleaning device for cleaning a rotor disk of a spinning rotor has a cleaning head with at least one cleaning element, and a receptacle on which the cleaning head is mounted and which can be fed to the spinning rotor for cleaning the rotor disk. The cleaning head includes at least one bearing area by means of which the cleaning head is mounted on the receptacle. A longitudinal direction of the bearing area defines an axial direction of the cleaning head. The cleaning head is mounted in the axial direction in a floating manner on the receptacle, and/or the cleaning element is mounted in the axial direction in a floating manner on the cleaning head.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: June 15, 2021
    Assignee: Maschinenfabrik Rieter AG
    Inventors: Adalbert Stephan, Harald Widner, Christian Kettner, Frank Baier
  • Patent number: 11028503
    Abstract: A method for operating a spinning device of a rotor spinning machine, and associated rotor spinning machine are provided in which a spinning rotor includes a rotor cup and a rotor shaft that is set into rotation with the aid of a drive situated in a drive housing. The drive is operatively connected to the rotor shaft, and the rotor shaft is supported in the drive housing by a bearing. The rotor cup is situated in a rotor housing to which vacuum is applied, and the rotor shaft extends between the drive housing and the rotor housing through a connection opening such that when a vacuum is drawn in the rotor housing during a spinning process, a vacuum is also drawn in the drive housing. Compressed air is feed into the drive housing via an air inlet at intervals to clean one or both of the drive housing and the bearing.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: June 8, 2021
    Assignee: Maschinenfabrik Rieter AG
    Inventors: Markus Kuebler, Constantin Rieger
  • Patent number: 11006545
    Abstract: A textile machine includes a plurality of workstations adjacently situated in a longitudinal direction of the textile machine, the workstations combined to form multiple sections wherein each section includes one or more of the workstations. A plurality of electrical supply units supply electrical energy to the workstations, wherein one of the electrical supply units is assigned to each section or to each workstation. A cooling arrangement includes at least one coolant circuit configured with the electrical supply units such that waste heat generated by one or more of the electrical supply units is absorbed by a coolant within the coolant circuit and transported to a common discharge area of the textile machine.
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: May 11, 2021
    Assignee: Maschinenfabrik Rieter AG
    Inventors: Bernd Bahlmann, Mario Maleck, Philipp Renner, Stefan Sippl
  • Patent number: 10968541
    Abstract: An air spinning machine for producing a yarn from a fiber structure includes a spinneret with an internal eddy chamber. A spindle in the spinneret has an intake opening and extends into the eddy chamber. An annular gap is formed between an outside surface of the spindle and an inside wall of the eddy chamber. Air jets in the spinneret introduce air into the eddy chamber to impart twist to the fiber structure at the intake opening. An interior draw-off channel in the spinneret has a longitudinal axis by means of which the yarn is withdrawn from the eddy chamber. The air jets are aligned in a direction relative to a front side of the spindle around the intake opening so that some of the air introduced via the air jets during a spinning operation enters the annular gap and a remainder of the air enters the draw-off channel.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: April 6, 2021
    Assignee: Maschinenfabrik Rieter AG
    Inventors: Peter Blankenhorn, Christian Griesshammer
  • Patent number: 10968542
    Abstract: A ring spinning machine includes a reciprocating, displaceably supported spindle rail that is driven by a motor via a shaft that passes through the ring spinning machine. The spindle rail is arranged along opposite sides of the ring spinning machine in a longitudinal orientation of the ring spinning machine and is subdivided into sections along each of the opposite sides. Cross braces extend between the opposite sides of the ring spinning machine and connect opposite sections of the spindle rail. The shaft is supported between the sections of the spindle rail. The spindle rail is suspended from at least one cam disc that is seated on the shaft. A circumferentially biased spring is configured with the shaft or the cam disc to provide torsional compensation on the shaft.
    Type: Grant
    Filed: November 8, 2018
    Date of Patent: April 6, 2021
    Assignee: Maschinenfabrik Rieter AG
    Inventor: Emil Krejci
  • Patent number: 10954610
    Abstract: A doffer device for a spinning machine includes a plurality of gripping devices, each gripping device having a rotatable gripping unit. Each gripping unit includes a bobbin gripper that grips a full bobbin and a tube gripper that grips an empty tube. Each gripping unit is rotatable between a gripping position in which the full bobbin can be gripped on the spindle and a placement position in which the empty tube can be placed on the spindle. A rotating device is configured with the gripping units to rotate the gripping units about an axis of rotation such that neighboring ones of the gripping units are rotated with a time lag relative to one another. The rotating device is driven by a toothed belt.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: March 23, 2021
    Assignee: Maschinenfabrik Rieter AG
    Inventor: Robert Nägeli
  • Patent number: 10934126
    Abstract: A textile machine assembly includes a delivery unit and a receiving unit, wherein during operation of the textile machine assembly the delivery unit delivers a sliver to the receiving unit. A sliver storage unit is operatively configured between the delivery unit and the receiving unit to store, at least intermittently, excess sliver between the delivery unit and the receiving unit when a delivery speed of the sliver at the delivery unit is higher than a receiving speed of the sliver at the receiving unit, and to release the stored sliver when the receiving speed of the sliver at the receiving unit is higher than the delivery speed of the sliver at the delivery unit. The sliver storage unit includes a diverting unit that is movable with respect to the delivery unit or the receiving unit, wherein movement of the diverting unit changes a sliver path of the sliver from the delivery unit to the receiving unit.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: March 2, 2021
    Assignee: Maschinenfabrik Rieter AG
    Inventor: Josef Hefele
  • Patent number: 10907278
    Abstract: A method for automatically piecing a thread at a workstation of a textile machine, includes seeking an end of the thread on a surface of a bobbin with a suction nozzle and unwinding the thread from the bobbin counter to a regular draw-off direction of the thread and sucking the thread into the suction nozzle. The bobbin is driven in a direction of reverse rotation with a drive. A thread loop is draw-opened in the thread and moved towards a piecing unit via movement of a feeder unit. The bobbin is driven in the direction of reverse rotation during the drawing-open of the thread loop such that the thread is unwound from the bobbin. A speed of reverse rotation of the bobbin is coordinated with movement of the feeder unit.
    Type: Grant
    Filed: January 10, 2019
    Date of Patent: February 2, 2021
    Assignee: Maschinenfabrik Rieter AG
    Inventors: Bernd Bahlmann, Romeo Pohn, Sebastian Brandl, Mario Maleck, Frank Baier, Robert Hagl, Thomas Gruber, Robin Wein, Christian Kettner, Andreas Hoyer
  • Patent number: 10900144
    Abstract: A yarn-forming element is provided for a roving machine that produces a roving from a fiber structure using compressed air. The yarn-forming element includes an intake opening for fibers of the fiber structure, an outlet for emergence of the roving produced from the fiber structure, and a draw-off channel that connects the intake opening and the outlet. A front end surrounding the intake opening is formed as a first truncated cone in at least some sections thereof. The first truncated cone includes a larger base surface and a smaller opposite cover surface that is adjacent the draw-off channel. An angle (?) between a lateral line of the first truncated cone and an axis of the first truncated cone is less than 90° and greater than 70°.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: January 26, 2021
    Assignee: Maschinenfabrik Rieter AG
    Inventors: Petr Haska, Christian Griesshammer
  • Patent number: 10858765
    Abstract: A work station of a textile machine includes a plurality of fiber-guiding work elements that are divided into at least two groups. A first work station part is defined at the work station on which a first group of the fiber-guiding work elements is arranged. A second work station part is defined at the work station on which a second group of the fiber-guiding work elements is arranged. The second work station part is arranged in a movable manner relative to the first work station part at the work station or is arranged in a removable manner at the work station. A pneumatic thread storage element is also provided for a work station of a textile machine for the temporary receiving of a thread, and includes a multi-part structure with a first thread storage section and a second thread storage section connected to one another at a separation point.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: December 8, 2020
    Assignee: Maschinenfabrik Rieter AG
    Inventors: Thomas-Georg Meier, Robert Hagl, Thomas Gruber, Lubomir Molacek
  • Patent number: 10858764
    Abstract: A yarn return unit for returning a yarn into a delivery unit of a textile machine during a piecing process includes a yarn-guiding section configured to guide and position the yarn with respect to the delivery unit. A blowing unit generates an air flow for returning the yarn from the yarn-guiding section into the delivery unit, the blowing unit defining a flow direction of the air flow. The yarn-guiding section includes an open contour that defines an insertion area through which the yarn is inserted into the yarn-guiding section transversely to the flow direction of the air flow.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: December 8, 2020
    Assignee: Maschinenfabrik Rieter AG
    Inventors: Robert Hagl, Thomas Gruber, Andreas Hoyer, Bernd Bahlmann
  • Patent number: 10844522
    Abstract: An open-end spinning machine and control method are provided for cleaning a spinning rotor of a spinning device in which at least one cleaning measure is carried out on the spinning rotor with the aid of a pneumatic or a mechanical cleaning device. With a control unit associated with the open-end spinning machine, settings are specified for the cleaning device to carry out the cleaning measure, wherein the settings are empirically determined based on one or more operational parameters of the spinning rotor. Operational parameters are stored in a memory bank associated with the control unit. The specific settings for carrying out the cleaning measure for a particular spinning rotor are automatically determined by reference to the operational parameters stored in the memory bank that are applicable to the particular spinning rotor.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: November 24, 2020
    Assignee: Maschinenfabrik Rieter AG
    Inventors: Harald Widner, Frank Baier, Sebastian Fritz
  • Patent number: 10837128
    Abstract: A method for processing a strand-type fiber bundle includes sending the fiber bundle to an air nozzle of a pre-spinning machine used to produce roving. A twist is imparted to the fiber bundle via a vortex air current within the air nozzle to form the roving, wherein the roving leaves the air nozzle through an outlet and is deposited in a receptacle. Normal operation is interrupted in a stop phases during which roving is not produced by the air nozzle. A start-up phase is commenced between the stop phase and subsequent normal operation wherein the roving produced during the stop phase is discarded after leaving the air nozzle when quality of the roving does not meet a desired specification. The roving discharge is deactivated when the quality of the roving meets the desired specification and the roving removed by the roving discharge is separated from the roving.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: November 17, 2020
    Assignee: Maschinenfabrik Rieter AG
    Inventors: Christian Griesshammer, Petr Haska