Abstract: An ink mist recovery device allows suction of ink mist with uniform suction force irrespective of a position on a confronting sheet. The ink mist recovery device includes a recovery casing having multiple suction ports confronting a sheet, and a suction unit connected to the recovery casing. At least one of a size of each of the suction ports and a first suction distance from each of the suction ports to a suction slit is set in accordance with a second suction distance from the suction unit to the suction slit via each of the suction ports so that the suction force is kept uniform at the respective positions on the sheet corresponding to the suction ports. The mist suction force is made uniform over the entire width of the suction slit to improve quality of the printed image without sucking ink droplets required to land.

Abstract: A cleaning head of a cleaning device for cleaning a spinning rotor, by means of a feed device, be fed into a predetermined cleaning position in the interior of the spinning rotor. The cleaning head has a cleaning element formed as a scraper element arranged in such a manner that, in the predetermined cleaning position of the cleaning head, it is fed to the open edge of the spinning rotor. A cleaning device for cleaning a spinning rotor features a corresponding cleaning head. With a method for cleaning a spinning rotor by means of the cleaning device, after feed of the cleaning head into the cleaning position, the open edge of the spinning rotor is cleaned by means of the scraper element.

Abstract: The present invention relates to petroleum recovery operations, and more particularly, to the use of pulse technology to enhance the effectiveness of waterflooding operations. The systems of the present invention generally comprise an injection means for continually injecting a fluid into the subterranean formation, and a pressure pulsing means for periodically applying a pressure pulse having a given amplitude and frequency to the fluid while the fluid is being injected into the subterranean formation.

Abstract: A process is disclosed for a spinning arrangement for dealing with the correction of an end break. During operation, sliver-like fiber material fed to the spinning arrangement is opened to single fibers by means of an opening roller. The single fibers are then transferred in the form of a fiber veil to a suctioned collecting surface, which is driven in the direction of motion of the single fibers. During the transport of the fibers by means of the collecting surface, the fiber veil is condensed to a narrow fiber strand and the condensed fiber strand is spun to a yarn downstream of a nipping line by means of a twisting nozzle. When an end-break occurs, the material feed is interrupted and the fiber strand is suctioned in the area of the nipping line until the collecting surface is free from single fibers. A piecing operation subsequently takes place.

Abstract: An arrangement for an open-end rotor spinning comprises a spinning rotor which is radially supported with a rotatable shaft in a wedge-shaped gap of two supporting disc pairs and axially in a step bearing housing. The shaft can be pulled out from its support from the operator's side of the arrangement and inserted again into the support. For the purpose of cleaning the gap between the back supporting disc pair and the front face side of the step bearing housing, a tube is provided having an entry opening at the operator's side of the arrangement and leading to the area of the step bearing housing and aligned against the shaft with an opening.

Abstract: A spinning device of a rotor spinning machine has a spinning rotor made of magnetically hard material, seated for rotation in an air chamber connected with an underpressure source. A stator includes at least two electromagnetic coils is arranged around the outer circumferential surface of the spinning rotor. The spinning rotor is made as a ring consisting of magnetically hard material and magnetized normal to the plane passing through the axis of the spinning rotor.

Abstract: An arrangement for an open-end rotor spinning comprises a spinning rotor which is radially supported with a rotatable shaft in a wedge-shaped gap of two supporting disc pairs and axially in a step bearing housing. The shaft can be pulled out from its support from the operator's side of the arrangement and inserted again into the support. For the purpose of cleaning the gap between the back supporting disc pair and the front face side of the step bearing housing, a tube is provided having an entry opening at the operator's side of the arrangement and leading to the area of the step bearing housing and aligned against the shaft with an opening.

Abstract: For the purpose of cleaning an open-end spinning rotor, the fiber feed is usually interrupted and the open-end spinning rotor slowed down. Subsequently, in the case of many embodiments, after a cover is removed from the vacuum chamber, cleaning elements are inserted into the exposed rotor cup. According to the present invention, it is provided that before the open-end spinning rotor is actually uncovered, namely before it comes to a standstill, the cover is moved just a short distance away from the vacuum chamber and thereafter, that the vacuum chamber is again closed over momentarily. In this way, a fiber ring present in the inside of the rotor cup can be more easily removed before the actual cleaning of the open-end spinning rotor.

Abstract: The spinning aggregates, arranged in a row, of an open-end spinning machine are each provided with an opening device, which comprises a removal opening for trash particles. A channel extending in a longitudinal machine direction takes up the expelled trash particles. A sliding carriage traverses to and from in the channel and pushes the trash particles collected in the channel to a suction point. The sliding carriage comprises a cleaning element, which can be pressed to the side wall of the channel under the action of a transverse force.

Abstract: An open-end spinning machine (1) with a plurality of adjacent open-end spinning units (2) each having a sliver opening device (4) with impurity-discharge openings (10). An impurity-removal device (11) is installed below the impurity-discharge openings (10) and comprises an impurity-removal belt (12) which can be driven in a reciprocating manner. A cleaning carriage (16) is arranged on the impurity-removal belt (12) and is connected by frictional engagement to the impurity-removal belt (12). The cleaning carriage (16) has a cleaning lip (18) which mechanically cleans the areas of the sliver opening devices (4) especially endangered by contamination. The cleaning carriage (12) can be shifted as required relative to the impurity-removal belt (12).

Abstract: The present invention concerns a process and an apparatus, in particular a rotor cover (3) and a thread withdrawal tube (2), of an open-end spinning machine, for the pneumatic cleaning of the thread withdrawal tube (2) which has an irregular inner contour. In this arrangement, there opens into the zone of the irregular contour (24, 220) of the thread withdrawal tube (2) an air feed tube (6, 60) directed against the irregular interior contour (24, 200) into the inner space (25) of the thread withdrawal rube (2), through which a flow of air is conducted against the irregular inner contour (24, 220) of the thread withdrawal tube (2). The irregular inner contour (24) of the thread withdrawal tube (2) is formed by means of a disassembly point between two thread guiding elements (20, 21, 22, 23) arranged in sequence, the elements making up the complete thread withdrawal tube (2) or a twist element (220).

Abstract: An open-end spinning machine comprises a plurality of adjacently arranged spinning aggregates. Each spinning aggregate consists essentially of a rotor unit comprising a spinning rotor, and an opening unit for opening a fed sliver into single fibers. The opening unit and the rotor unit each comprise a plurality of components. In order to modernize the open-end spinning machine, at least one of the above mentioned components is replaced by at least one modernized component in such a way that the efficiency of the spinning aggregate is improved.

Abstract: A fiber transporting apparatus for a rotor type open end fine spinning machine is provided that may reduce an amount of effective fiber discharged from a burling opening portion without degrading yarn quality of the spun yarn. Fiber opened by a combing roller (11) is fed into a rotor through a fiber transporting channel (13) leading from a circumferential surface of the combing roller (11) to a predetermined position of the rotor (6) in accordance with a negative pressure degree within the rotor (6). After debris is removed from the opened fiber by a burling opening portion (12), the opened fiber is moved together with an air flow directed from a downstream side of the burling opening portion (12) in a rotational direction of the combing roller (11) toward an inlet (13a) of the fiber transporting channel (13).

Abstract: In order that stray fibers do not settle in the rotor during the spinning start process at the spinning box of a rotor spinning machine, an openable air valve is provided for initially cleaned the rotor by delivering an air current into the rotor either by drawing ambient air through the valve as a consequence of the spinning vacuum or by blowing in compressed air through the valve. As an alternative to known spring-loaded ball valves pose the danger that the spring ceases to perform due to deposits of dust and fibers, the present invention provides a magnet arranged in association with the valve seat in the area of its valve opening to attract the ball, which consists of a magnetizable material, and thereby hold the ball in closed position.

Abstract: A mechanically operating debris removal device for an open-end spinning machine 1 comprises a guide conduit arranged below the spinning units and enclosing a debris conveyor belt. The guide conduit comprises a base and a cover, which may be pivotable or detachable relative to the base. During spinning operation, the base and the cover form an essentially closed belt guide conduit. Debris passage openings are formed in the cover with associated air and debris guide deflectors to communicate with debris exit openings in the sliver opening devices. The upper run of debris conveyor belt creates a slight suction flow in guide conduit and at the debris passage openings to prevent fine debris from settling in the area of the debris passage openings and in the area of debris exit openings of the sliver opening devices.

Abstract: In an open-end spinning unit 1 having a pivotably mounted cover element 8 for covering a rotor housing 2 of the spinning unit 1, a sliver opening device is incorporated into the cover element 8. The sliver opening device has an opening cylinder housing 17 fixed to the cover element 8 with an opening cylinder 21 supported by the housing 17 for rotational sliver opening operation. The housing 17 defines a sliver infeed position and a downstream soil discharge opening 28. The opening cylinder housing further includes side walls 43, 44 perpendicular to the axis of the opening cylinder 21, the side walls presenting inner wall surfaces 45 which diverge at least in the area of the soil discharge opening 28 toward respective wall edges 49.

Abstract: The adjacently arranged spinning aggregates of an open-end spinning machine are each provided with an opening device, which includes a removal opening for trash particles. A channel extending in the machine longitudinal direction takes up the trash particles. A sliding carriage traverses in the channel, which sliding carriage is coupled to a belt-like traction mechanism and which pushes the gathered trash particles ahead of itself to a suction point. The channel is wider than the distribution area of the trash particles in this direction. A clearance area occurs hereby in the channel, in which the traction mechanism extends.

Abstract: The present invention relates to a device for the control of an air stream in an open-end spinning device (6). The open-end spinning device (6) is equipped with an air channel (8) opening into the second housing compartment (600) of the open-end spinning device (6), which is connected via a valve (82) to a connection opening (83). An air channel (95) with a presentation end (950) located on a traveling service carriage (9) can be presented to this connection opening (83). This presentation end (950) is connected by means of a movable intermediate segment (951) to the air channel (95) and is capable of movement relative to same so that when the connection opening (83) is swiveled, it follows this movement without changing its position relative to the connection opening (83).

Abstract: So that stray fibers do not become attached to the rotor during a yam piecing process in the spinning box of a rotor spinning machine, the rotor may be cleaned by an air flow generated by drawing air into the rotor by the prevailing spinning vacuum or by blowing compressed air into the rotor through a closable opening in the rotor chamber. To avoid the danger that soiling of the closure of the opening will permit aspiration of secondary air and impair control of the air supply, the closure is formed as a slide member with a leading edge configured for cleaning the opening during closing movement.

Abstract: A method of reducing trash recirculation into the fiber formation stream of an open-end spinning machine yarn formation station of an open-end spinning machine of the type having a movable trash belt which collects trash removed from sliver during yarn formation, said spinning machine having a predetermined, relatively high, conventional trash belt speed, comprising the steps of moving the trash belt at a low speed determined by the type of trash contained in the fiber, the type of yarn being spun and the type of fabric to be formed from the yarn, but in no event more than 50 percent of the conventional trash belt speed. The low speed of the trash belt is between 15 and 40 percent of conventional trash belt speed, with the low speed increasing as the proportion of heavy to light trash in the trash mixture increases.

Abstract: A method of reducing trash recirculation into the fiber formation stream of an open-end spinning machine yarn formation station in an open-end spinning machine of the type having a movable trash belt which collects trash removed from sliver during yarn formation, the spinning machine having a predetermined, relatively high, conventional trash belt speed "X", and a predetermined optimum trash brush rotational speed "Y". The method includes the steps of moving the trash belt at a low speed "Z" determined by the type of trash contained in the fiber, the type of yarn being spun and the type of fabric to be formed from the yarn, but in no event more than 50 percent of the conventional trash belt speed "X", and rotating the trash brush at optimum speed "Y" without regard to the speed "Z" of the trash belt.

Abstract: In the case of an opening device for an open-end spinning machine, the rotating opening roller is arranged in a housing with a prevailing vacuum and has one front side which is exposed to the free atmosphere. In the area of this front side the opening roller is sealed off against the housing by means of a labyrinth seal. The labyrinth seal starts in the area of a peripheral combing structure of the opening roller with a first sealing gap and ends with a second sealing gap in the free atmosphere. The sealing gaps are formed by cylindrical collar surfaces of the opening roller and corresponding hollow cylindrical countersurfaces of the housing. In addition, the collar surfaces are provided with fly repulsing notches, whose direction of effect is such that the fly is repulsed at the first sealing gap towards the combing structure and at the second sealing gap, repulsed towards the free atmosphere. The front side of the open roller exposed to the free atmosphere is not covered by a lid.

Abstract: A method of reducing trash recirculation into the fiber formation stream of an open-end spinning machine yarn formation station in an open-end spinning machine of the type having a movable trash belt which collects trash removed from the yarn during formation. The method comprises the steps of moving the trash belt at a first predetermined rate of movement for a predetermined period of time, moving the trash belt at a second predetermined rate of movement less than the first rate of movement for a predetermined period of time, cleaning the trash belt and repeating the steps.

Abstract: An open-end spinning frame having a sliver opening device wherein the housing for the opening roller has a dirt outlet opening for removing dirt particles from the housing as well as for admitting air flow to assist in the fiber opening process. In accordance with the invention, an air guidance system is arranged in the area of a wall of the housing bordering the dirt outlet opening rearwardly with respect to the direction of rotation of the opening roller which serves to ensure dependable removal of problematic dirt particles, i.e. dirt particles which have a relatively large surface in respect to a relatively small mass.

Abstract: A nep separator and detector for presenting a fiber sample having fibers, neps, and trash. A toothed rotating cylinder receives the fiber sample at a fiber sample receiving point, and impacts and propels at least a portion of the trash and neps along an ejection path. An air curtain is directed toward and passes across a portion of the toothed surface of the rotating cylinder, at a location rotationally after the fiber sample is received by the toothed rotating cylinder. The air curtain crosses and is oriented transverse to the ejection path, and draws at least a portion of the neps out of the ejection path and onto the surface of the toothed cylinder as it rotates. The trash propelled by impact with the toothed rotating cylinder has sufficient momentum to pass through the air curtain along the ejection path. A dead air space is positioned in the ejection path and disposed adjacent the air curtain and across the air curtain from the fiber sample receiving point.

Abstract: In the case of an open-end spinning aggregate, an opening roller rotates in a housing which comprises a device for cleaning fiber material. A trash removal opening is provided between a sliver feed point and a fiber delivery point in the circumferential wall which surrounds the opening roller, which trash removal opening opens out into the atmosphere. Directly downstream of the trash removal opening, but at a distance upstream of the fiber delivery point, there is a second opening which opens out into the atmosphere and which is purely an air inlet opening. By means of this air inlet opening, the speed of the air flow entering the trash removal opening is reduced, so that even small trash particles, to which fibers may adhere, are removed.

Abstract: In order to increase the operating efficiency of the spinning machine and in order to generate a response suitable to the hierarchy or quality of the error message in case of an error in the yarn or in another electrical or mechanical device of the spinning machine, the parameter signal of the yarn obtained by a measuring device (20) is transmitted to an evaluating phase (21,22) which emits error message signals. These are attributed in an attribution section (23) to pre-defined error groups (A,B,C,D). Each one of the output signals of the attribution section represents a group of errors and generate (automatically) graduated responses for the elimination of errors.

Abstract: A pneumatic cleaning device (10) for the spinning stations of an open-end spinning machine (1) is disposed on the sliver draw-in arm (22) of a traveling service unit (16) for unitary movement with the draw-in arm between a resting position (I) and an operating position (II). In the operating position (II), two suction nozzles of the cleaning device are positioned in the area of the sliver opening device of a spinning station at which the service unit is positioned. One suction nozzle is pivotable by an electric motor drive acting through a lever linkage arrangement to cover the area below the dirt outlet opening of the sliver opening device.

Abstract: A method of and apparatus for reducing trash recirculation into the fiber formation stream of an open-end spinning machine yarn formation station in an open-end spinning machine of the type having a movable trash belt which collects trash removed from the yarn during formation. The method includes the steps of moving the trash belt at a predetermined rate of movement for a predetermined period of time, stopping the trash belt for a predetermined period of time during which trash collects on the belt, cleaning the trash from the belt during movement of the belt, and repeating the steps.

Abstract: An attending device of a textile machine, in particular of a rotor spinning machine, is provided having pneumatic pressure means intended to attend a working place and being disengageably connected to an overpressure source, and having underpressure pneumatic means disengageably connected to an underpressure source. The underpressure source and the overpressure source are made as a pneumatic generator situated on the attending device, and a closed filter of impurities mounted on the attending device is inserted before the air inlet into the pneumatic generator.

Abstract: A method and device of cleaning the rotor (6) of a rotor spinning machine are provided in which, after the opening of a spinning unit, there are sucked off from the rotor (6) fibres and impurities being released from the inner surface of the rotor by pressure air applied to said inner surface. The cleaning pressure air is led into the rotor (6) in at least two air streams producing in the rotor 6 a symmetrical streaming in one and the same direction and the supplied air, together with the released impurities, is sucked off through the center of the inlet aperture (63) of the rotor (6).

Abstract: A pneumatic debris aspirating device adapted to be retrofitted on open-end spinning frames originally designed for a mechanical debris disposal installation utilizes an asymmetrical debris pickup funnel which can be connected via a connector conduit to a source of suction which is part of the spinning mill. The debris aspirating device is embodied and disposed such that opening of a cover to each rotor spinning unit is not hampered.

Abstract: A method of spinning-in yarn on open-end spinning machines in which an interruption of the spinning process is followed by the stop of the feed of the sliver (4) into the singling-out device (2) whose combing roller (22) keeps turning, and the rotor is stopped at least during its cleaning. When the rotor (1) has re-started the yarn end is returned to it and brought into contact with the newly formed fiber band. Prior to the re-starting of the rotor (1) and at the latest simultaneously with the start of the feed device (3) of the sliver (4), the surface of the combing roller (22) is acted upon by a pressure air stream acting in the sense of rotation of the combing roller (22) between the place of supply of the sliver (4) to the combing roller (22) and the mouth of the fiber feed channel (212) to the rotor (1) so as to remove from the clothing (221) of the combing roller (22) fibers and sticking impurities. The invention also relates to a device for carrying out the method.

Abstract: A method and system for maintaining spinning machines having a plurality of spinning stations include automatically positioning a maintenance unit proximate to the spinning stations for removing spinning components from the spinning stations and replacing the removed spinning components with replacement spinning components. The maintenance unit is configured to remove the spinning component from the spinning station for servicing, to immediately replace the removed spinning component with a replacement spinning component which is carried by the maintenance unit, and to transfer the removed spinning component to a remote service station. The removed spinning component is serviced at the service station and is subsequently picked up by the maintenance unit for subsequent installation into another spinning station.

Abstract: Spinning stations of open-end spinning frames are cleaned from time to time to increase productivity, e.g. each time a sliver can change is made although, if the times between the exchange of two cans are too long, cleaning may be performed at a preset cycle. The sliver must be removed from the spinning station for this purpose. To be able to reintroduce a defined length of the removed sliver into the spinning station at the end of a cleaning operation, the end of the sliver is aspirated from between the draw-in roller and the gripping table of the spinning station by means of an aspiration and blower nozzle and pulled out of the spinning box of the spinning station and, after the cleaning operation, the sliver is introduced into the spinning station by means of the aspiration and blower nozzle. The aspiration nozzle has an insert with bores for causing the tip end of the sliver to assume a particular shape.

Abstract: Apparatus for supplying conditioned air to spinning machines which includes a duct for transporting conditioned air to the machine, such duct having an opening through which the conditioned air exits the duct. An air diffuser is mounted on the duct adjacent the opening therein, and it includes a generally V-shaped air directing wall that has upper flanges extending outwardly therefrom, with openings in such flanges, whereby a minor portion of the conditioned air flows upwardly through the openings in the flange and is directed toward the open end spinning machine, and a major portion of the conditioned air is directed outwardly toward the sliver being fed to the machine.

Abstract: A rotor spinning apparatus includes a support frame stationarily disposed on a frame of a spinning machine. A bearing is disposed on the support frame. A spinning rotor is disposed on the bearing and has a rotor axis and a rotor opening. A rotor housing surrounds the spinning rotor. A lid element is rotatably supported about a pivot axis. The pivot axis is oriented orthogonally to the rotor axis and is disposed approximately vertically beneath the rotor opening. The lid element covers the rotor housing and has a sliver feed roller, an opening roller, a fiber guide channel plunging into the rotor opening, a yarn draw-off opening, and a dirt separator.

Abstract: A process and device for piecing in an open-end spinning device includes switching on a fiber feeding device for a predetermined period of time so that fibers which are undesired for piecing are combed out of the leading end of the fiber sliver which is presented to an opener device. The combed out fibers are deflected from the fiber collection surface. The fiber feeding device is switched off after the predetermined period of time once the undesired fibers have been combed out and is maintained in an off condition for a short period of time so that the fibers remaining in the leading end of the fiber silver are only minimally damaged by the opener device. The fiber feeding device is switched back on and the fiber stream is deflected from the fiber collection surface as the stream increases to full strength. The fiber stream is subsequently deflected to the fiber collection surface for piecing in coordination with backfeeding of a yarn end to the fiber collection surface.

Abstract: An open-end spinning device (1) of the type having a sliver opening device (30) and a pneumatically operated debris removal device (34) is disclosed. The opening cylinder housing (11) of the sliver opening device (30) has a debris discharge opening (15) and a cover element (9) mounted for restricted pivoting movement on a pivot shaft (10). A debris collecting element (16) is affixed to the cover element at a spacing (33) beneath the debris discharge opening and is connected to a suction device (8) which is a part of the spinning machine. The clear space (33) between the debris discharge opening (15) and the debris collecting element (16) assures that an auxiliary air flow (29), which is effective in the area of the debris discharge opening (15) to control the transport of fibers for the spinning process, is not affected by a suction air flow (28) applied at the debris collecting element (16).

Abstract: A fiber opening device for use in a discontinuous spinning process. The opening device includes an opening roller rotatably mounted about an axis and having a cylindrical working surface which extends around the axis. Opening elements are provided around the working surface. A space is defined between an axially outermost fiber opening element and an adjacent outer edge of the cylindrical working surface. A pressure reduction opening is provided for reducing pressure in or around that space. The pressure reduction opening is arranged to urge fibers into engagement with the working surface.

Abstract: A housing encloses a rotor, an opening roller, and a conduit communicating between the rotor and opening roller for the feeding of fiber from the opening roller to the rotor. The housing forms a trash removal chamber below the opening roller into which trash is discharged toward the bottom of the chamber during operation of the opening roller; the area of the opening roller where the trash is discharged is the trash outlet opening. The rotation of the opening roller creates an air flow draft in the direction of rotation. This air flow draft, taken in combination with suction applied in the rotor of the open-end spinning unit, creates an air flow suction draft from the chamber through the conduit in the direction of the opening roller rotation. An air flow is provided in the trash removal chamber in and from the chamber in a direction counter to the direction of the air flow draft rotating with the opening roller in the region of the trash outlet opening.

Abstract: To spin a yarn with an open-end rotor spinning device, the fibers are fed to a fiber guiding surface from which the fibers are deposited on the sliding wall of a spinning rotor after passing over a gap. At the same time, an air stream is guided through the gap into the interior of the spinning rotor and is then removed from the interior of the spinning rotor without passing through the gap again. To produce the air stream, a device for the production of a pressure drop which produces the air flow flowing into the interior of the spinning rotor is assigned to the gap (17).

Abstract: A yarn lap preventor for mounting in an open end spinning machine to deflect a parted yarn end away from an enlarged diameter area of a rotating take-up shaft of the open end spinning machine. The yarn lap preventor is preferably integrally molded plastic including a body portion connected to a base mounting portion. The body portion of the yarn lap preventor includes a tapered edge which is positioned adjacent the enlarged diameter area of the take-up shaft. The body portion also includes a shield portion which extends along an arcuate portion of the enlarged diameter area. The base mounting portion includes a slotted opening to facilitate mounting with an existing fastener, such as the fastening screw which secures a yarn guide eyelet mounting plate to a traverse bar. A method for preventing the accumulation of yarn laps is also disclosed which includes deflecting a parted yarn and shielding the enlarged diameter area of the take-up shaft from the parted yarn end.

Abstract: A sliver opening and fiber feeding device for opening a sliver into individual fibers and feeding the individual fibers to the rotor of an open end spinning machine is provided with a polytetrafluoroethylene coating for the interior surface of the housing of the sliver feeding and opening device, in particular, the trash discharge passage. The polytetrafluoroethylene coating advantageously has a relatively low co-efficient of friction to thereby reduce the affinity of sticky material, which may be present in the sliver due to the presence of insect residue or the like, to stick to the interior surfaces of the device. The polytetrafluoroethylene coating is included on an insert element mounted in the discharge passage, with the insert element being capable of being retrofitted in an existing sliver opening and fiber feeding device.

Abstract: A spinning machine, preferably an open end spinning machine, having a conduit associated therewith for distributing a flow of conditioned air along a predetermined flow path in which the conditioned air is caused to flow in a direction directly toward and across the rapidly rotating, heat-generating element (e.g., a rotor disposed in a spin box), with a portion of the conditioned air flowing in and around the rapidly rotating element to absorb heat from the same, and with another portion of the conditioned air flowing across the length of fibers fed to the spinning machine and across the yarn produced at the spinning machine to moisturize the length of fibers and yarn.

Abstract: A spinning or twisting device in which a yarn is to be back-fed into the bore of a pipe-shaped element subjected to negative pressure in order to repair a yarn break. This pipe-shaped element is made in form of a yarn draw-off pipe of an open-end spinning device or as part of a pneumatic twisting device.A presenting device is moved over and beyond the pipe-shaped element into a yarn inserting position. The end of the pipe-shaped element towards the moving path of the presenting device is provided with a nozzle which is provided, in relation to the bore, on its side towards the yarn inserting position of the presenting device with a yarn support, and on its side away from the yarn inserting position with a yarn insertion groove, oriented in the direction of movement of the presenting device. The bottom of the yarn insertion groove is at a greater distance from the moving path of the presenting device than the yarn support.

Abstract: On an open-end spinning machine having a plurality of spinning units arranged in a row, a servicing apparatus is movably arranged on which cleaning elements are provided which can be applied to the environment of an opening roller and therefore clean it. A control device is assigned to the cleaning elements which controls a first cleaning operation when servicing apparatus is moving and a second cleaning operation when the servicing apparatus is stopped. Thus, a cleaning is possible which is adapted to the moving condition of the servicing apparatus.

Abstract: An open-end spinning machine has a rotor with a shaft, an opening and an interior with a fiber slipping surface terminating in a fiber collecting groove in a given plane. A cleaning device for cleaning the interior of the rotor includes an arm. A rotatable shaft connected to the arm is offset relative to and disposed at an angle relative to the rotor shaft. A support on the rotatable shaft has an end on which at least one cleaning tool is disposed. The support is rotatable about the rotatable shaft with the end describing an arc cutting across the given plane for delivering the at least one cleaning tool with a forward motion through the rotor opening to a portion of the interior of the rotor to be cleaned.

Abstract: A sliver feeding and opening device includes an outlet opening for passage of separated fibers to the rotor and an intake opening for the intaking of sliver to be separated into fibers. An intermediate opening is disposed in the chamber of the housing of the device at a location downstream of the outlet opening and upstream of the intake opening. An air stream reduction conduit extends from the intermediate opening to the outlet passage. The intermediate opening and the air stream reduction conduit conduct air from a revolving stream of air which revolves in the space between the opening roller and the cylindrical wall of the housing of the sliver feeding and opening device to prevent the revolving stream of air from detrimentally interfering with the orderly feeding of sliver at the intake opening to the opening roller.

Abstract: A multi-position rotary spinning machine includes an endless belt guided along the machine past a plurality of open-end spinning units each having a valve for operation by cam means of the belt to bring an eccentric port into and out of gas communication with another eccentric port of the valve by virtue of rotation of a rotary valve member driven by engagement of cam studs and carried by the belt with projections, respectively, of the rotary valve member.The valves can be used for providing intermittent application of purging suction to the beater trash box of an open-end spinning or to a slub collection trough of a friction spinner.