Patents Assigned to Maschinenfabrik Rieter
-
Patent number: 11028503Abstract: 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: GrantFiled: February 20, 2019Date of Patent: June 8, 2021Assignee: Maschinenfabrik Rieter AGInventors: Markus Kuebler, Constantin Rieger
-
Patent number: 11006545Abstract: 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: GrantFiled: May 24, 2019Date of Patent: May 11, 2021Assignee: Maschinenfabrik Rieter AGInventors: Bernd Bahlmann, Mario Maleck, Philipp Renner, Stefan Sippl
-
Patent number: 10968541Abstract: 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: GrantFiled: April 18, 2017Date of Patent: April 6, 2021Assignee: Maschinenfabrik Rieter AGInventors: Peter Blankenhorn, Christian Griesshammer
-
Patent number: 10968542Abstract: 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: GrantFiled: November 8, 2018Date of Patent: April 6, 2021Assignee: Maschinenfabrik Rieter AGInventor: Emil Krejci
-
Patent number: 10954610Abstract: 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: GrantFiled: November 8, 2016Date of Patent: March 23, 2021Assignee: Maschinenfabrik Rieter AGInventor: Robert Nägeli
-
Patent number: 10934126Abstract: 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: GrantFiled: October 18, 2018Date of Patent: March 2, 2021Assignee: Maschinenfabrik Rieter AGInventor: Josef Hefele
-
Method for automatically piecing a thread at a workstation of a textile machine, and textile machine
Patent number: 10907278Abstract: 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: GrantFiled: January 10, 2019Date of Patent: February 2, 2021Assignee: Maschinenfabrik Rieter AGInventors: Bernd Bahlmann, Romeo Pohn, Sebastian Brandl, Mario Maleck, Frank Baier, Robert Hagl, Thomas Gruber, Robin Wein, Christian Kettner, Andreas Hoyer -
Patent number: 10900144Abstract: 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: GrantFiled: May 4, 2017Date of Patent: January 26, 2021Assignee: Maschinenfabrik Rieter AGInventors: Petr Haska, Christian Griesshammer
-
Patent number: 10858764Abstract: 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: GrantFiled: October 25, 2018Date of Patent: December 8, 2020Assignee: Maschinenfabrik Rieter AGInventors: Robert Hagl, Thomas Gruber, Andreas Hoyer, Bernd Bahlmann
-
Patent number: 10858765Abstract: 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: GrantFiled: October 18, 2017Date of Patent: December 8, 2020Assignee: Maschinenfabrik Rieter AGInventors: Thomas-Georg Meier, Robert Hagl, Thomas Gruber, Lubomir Molacek
-
Patent number: 10844522Abstract: 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: GrantFiled: August 31, 2018Date of Patent: November 24, 2020Assignee: Maschinenfabrik Rieter AGInventors: Harald Widner, Frank Baier, Sebastian Fritz
-
Patent number: 10837128Abstract: 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: GrantFiled: June 27, 2017Date of Patent: November 17, 2020Assignee: Maschinenfabrik Rieter AGInventors: Christian Griesshammer, Petr Haska
-
Patent number: 10829338Abstract: A method at a workstation of a spinning machine or winding machine supplies an auxiliary thread from a thread nozzle to a suction assigned to the workstation, the auxiliary thread stretched between the thread nozzle and the suction. The auxiliary thread is severed to form a thread section protruding into the suction and a thread section extending into the thread nozzle, wherein the thread section protruding into the suction is carried away by the suction. The thread section extending into the thread nozzle is grasped with a thread receiver such that the thread section extending into the thread nozzle extends between the thread nozzle and the thread receiver. The thread section extending into the thread nozzle is severed to form a thread section remaining in the thread nozzle and a thread section coming from the thread receiver. The thread section coming from the thread receiver is transferred to the suction of the workstation.Type: GrantFiled: July 18, 2018Date of Patent: November 10, 2020Assignee: Maschinenfabrik Rieter AGInventors: Bernd Bahlmann, Romeo Pohn, Adalbert Stephan, Mario Maleck, Robert Hagl, Evzen Pilar, Christian Kettner
-
Opening roller for an open-end spinning device, and open-end spinning device with the opening roller
Patent number: 10822726Abstract: An opening roller for an open-end spinning device includes a drive shaft and a roller body connected to the drive shaft. The drive shaft includes a coupling element for connection to a driven shaft of a drive. The coupling element includes a form-locking element. An open-end spinning device is also provided that incorporates the opening roller.Type: GrantFiled: December 6, 2018Date of Patent: November 3, 2020Assignee: Maschinenfabrik Rieter AGInventors: Markus Kuebler, Constantin Rieger -
Patent number: 10793977Abstract: A device and method for regulating pressure in a flock feed include a storage device disposed for receipt of fiber flocks, an exhaust air fan having a drive, and a controller in communication with the drive. A filling level measurement device and a pressure measurement device are provided in the storage device. The controller is configured to regulate the drive to achieve a target pressure as sensed by the pressure measurement device that is based on a filling level of the fiber flocks determined by the filling level measurement device.Type: GrantFiled: June 8, 2018Date of Patent: October 6, 2020Assignee: Maschinenfabrik Rieter AGInventors: Tobias Wolfer, Gerhard Gschliesser
-
Patent number: 10767286Abstract: A device for piecing a thread at a workstation of a textile machine includes a suction nozzle configured to pick up a thread end of the thread from a bobbin, the suction nozzle including an entry opening for the thread. A feeder unit is movable with respect to the suction nozzle and includes a cover element configured to close the entry opening in a first position (I) of the feeder unit and to unblock the entry opening in a second position (II) of the feeder unit. The cover element includes a thread-guiding element having an open contour.Type: GrantFiled: October 2, 2018Date of Patent: September 8, 2020Assignee: Maschinenfabrik Rieter AGInventors: Mario Maleck, Robert Hagl, Thomas Gruber, Robin Wein, Christian Kettner, Bernd Bahlmann, Romeo Pohn
-
Patent number: 10767284Abstract: A thread draw-off nozzle for an open-end rotor spinning device includes an entrance-side nozzle funnel and an exit-side nozzle bore adjoining the nozzle funnel. A plurality of notches are arranged in the nozzle funnel and extend essentially radial to the nozzle bore. Each notch has an inlet wall, a baffle wall, a radially outer notch inlet, and a radially inner notch outlet. Each notch further includes an essentially flat notch bottom arranged between the inlet wall and the baffle wall.Type: GrantFiled: November 2, 2016Date of Patent: September 8, 2020Assignee: Maschinenfabrik Rieter AGInventors: Guenter Baur, Michael Basting
-
Patent number: 10759629Abstract: A method is provided for controlling movement and operation of an attending device of a yarn manufacturing textile machine, wherein the attending device moves along a row of workstations arranged next to each other to perform operations at the workstations. The method controls the movement of the attending device along the work stations and operations of the attending device based on success statistics of the operations at the workstations to achieve an overall increased efficiency of the textile machine. An operational stay of the attending device at a particular one of the work stations is terminated without waiting for a result of the operation being performed by the attending device at the particular workstation.Type: GrantFiled: October 24, 2018Date of Patent: September 1, 2020Assignee: Maschinenfabrik Rieter AGInventor: Evzen Pilar
-
Patent number: 10753013Abstract: A method for producing a rotor cup for an open-end spinning rotor includes forming separating structures on a front-side rim of the rotor cup for breaking up and preparing a yarn end for piecing. The separating structures are formed by a non-mechanical manufacturing method without contact between the front-side rim and a mechanical forming tool. A rotor cup formed in accordance with the method is also provided.Type: GrantFiled: June 12, 2018Date of Patent: August 25, 2020Assignee: MASCHINENFABRIK RIETER AGInventors: Markus Kuebler, Bernd Loos, Andreas Frank
-
Spinning-mill machine and a method for operating sleeve transport devices on a spinning-mill machine
Patent number: 10718071Abstract: A spinning-mill machine includes a plurality of cross-winding devices arranged next to each other and in sections in a longitudinal direction along opposite machine sides of the spinning-mill machine, each cross-winding device configured to wind yarn onto a sleeve. A plurality of sleeve stacks are arranged with each machine side and are configured to stockpile empty sleeves. A plurality of sleeve transport devices are configured alongside the cross-winding devices of the machine side, wherein each of the sleeve stacks has one of the sleeve transport devices operationally associated therewith to deliver the sleeves from the sleeve stack to the cross-winding devices.Type: GrantFiled: March 23, 2018Date of Patent: July 21, 2020Assignee: MASCHINENFABRIK RIETER AGInventors: Sebastian Brandl, Adalbert Stephan, Harald Widner, Martin Zipperer, Helmut Haunschild, Christian Kettner, Alexander Holzheimer