EP0203508B1 - Wiederanspinnen in Offenend-Spinnmaschinen - Google Patents

Wiederanspinnen in Offenend-Spinnmaschinen Download PDF

Info

Publication number
EP0203508B1
EP0203508B1 EP86106880A EP86106880A EP0203508B1 EP 0203508 B1 EP0203508 B1 EP 0203508B1 EP 86106880 A EP86106880 A EP 86106880A EP 86106880 A EP86106880 A EP 86106880A EP 0203508 B1 EP0203508 B1 EP 0203508B1
Authority
EP
European Patent Office
Prior art keywords
yarn
rotor
spinning
reserve
piecing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
EP86106880A
Other languages
English (en)
French (fr)
Other versions
EP0203508A3 (en
EP0203508A2 (de
Inventor
Jürg BISCHOFBERGER
André Lattion
Manfred Schreiber
Walter Slavik
Jakob Stapfer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26286183&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0203508(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from GB08313993A external-priority patent/GB2140042B/en
Priority claimed from GB838333471A external-priority patent/GB8333471D0/en
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Priority to AT86106880T priority Critical patent/ATE54683T1/de
Publication of EP0203508A2 publication Critical patent/EP0203508A2/de
Publication of EP0203508A3 publication Critical patent/EP0203508A3/en
Application granted granted Critical
Publication of EP0203508B1 publication Critical patent/EP0203508B1/de
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/48—Piecing arrangements; Control therefor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/48—Piecing arrangements; Control therefor
    • D01H4/50—Piecing arrangements; Control therefor for rotor spinning
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing

Definitions

  • the present invention relates to an apparatus and a method for piecing a rotor spinning machine comprising a plurality of spinning stations, each including a spinning unit with a rotor package forming means to form a package of yarn produced at the spinning unit, a nip roll pair for withdrawing yarn from the unit and feeding it to said package forming means, feed means selectively operable to feed fibers to said unit for spinning into yarn and drive means operable to drive the rotor at a selected operating speed and to drive the package forming means, nip roll pair and feed means at respective speeds each in a selected relationship to said operating speed, said piecing apparatus comprising means for separating said nip rolls.
  • Rotor spinning machines of the type described are now extremely well-known in the rotor spinning art. By way of example only, details of such machines can be obtained from United States Patent Specification No. 3 375 649.
  • a commercial rotor spinning machine comprises a large number (usually approx. 200) spinning stations. For economic reasons, it is preferred not to provide individual piecing means at each of these stations, but instead to provide a travelling piecing apparatus movable from station to station and capable of performing a piecing operation at any selected station.
  • the system offered by that company on the market involves withdrawal of seed yarn and newly spun yarn from the rotor spinning unit via a withdrawal path passing through the piecing apparatus and by means of a withdrawal unit specifically provided for this purpose in the travelling piecing apparatus. After completion of the yarn piecing operation, therefore, control of the withdrawal operation has to be passed back from the piecing apparatus to the machine - this substantially complicates operation of both the travelling piecing apparatus and the machine.
  • GB-A-2 035 395 a method and device for joining thread is described wherein the thread is returned from a take-up bobbin into the spinning rotor by means of a mobile thread joining means.
  • This joining means comprises a suction tube, a driving arm to rotate the bobbin backwards, a thread gripper, a take-off roller and a clamping roller and a thread feeder. Withdrawal of the seed yarn is only effected by this joining means without use of any of the parts of the spinning unit.
  • the coordination of movement of the lever system which belongs to this joining means has to be very accurate in order to prevent thread breaking during piecing. During piecing, the speed of the rotor is much lower than the normal operating speed.
  • withdrawal of yarn after piecing with a fiber ring in the rotor is effected by re-engaging previously separated withdrawal rolls on the rotor spinning machine, as is known from the US Patent referred to above.
  • Feeding of the seed yarn back to the rotor and initiation of withdrawal of the seed yarn and newly spun yarn pieced thereto can be effected while the spinning unit is operating at a predetermined constant speed, preferably at or near the selected normal operating speed for the spinning unit.
  • the piecing operation is preferably carried out while the spinning unit is operating at or near to 80'000 RPM.
  • a predetermined time period is defined at the expiry of which withdrawal of seed yarn is commenced.
  • the duration of a "rest period” is determined.
  • this rest period the end of the seed yarn is in the rotor groove and twist is transferred from the seed yarn to fibers in the groove.
  • twist transference to the fibers is controlled.
  • upstream and downstream are used. These terms relate directions and positions to the direction of travel of the yarn out of the spinning unit to the package forming means during normal spinning operation, that is, in Fig. 1 "downstream” is upwards relative to the Figure since the package forming means is located above the spinning unit.
  • Figs. 1 and 2 are diagrammatic only and are in no way intended to represent exactly either a practical machine design or an exact piecing sequence.
  • FIG. 1 illustrates in side elevation one spinning station of an open-end spinning machine. There would be many such stations arranged side by side in a practical machine, nowadays commonly up to 100 stations per machine side.
  • the dotted line illustration in Fig. 1 represents a piecing apparatus which normally travels to and fro past the spinning stations but which can be stopped in alignment with a selected station in order to perform a piecing operation as will be outlined.
  • the dotted line illustrations in Fig. 1 also show certain modified positions of the elements of the spinning station and of the thread path during a piecing operation.
  • the illustrated spinning station comprises a spinning unit indicated generally by the numeral 10, a yarn withdrawing means indicated generally by the numeral 12 and a package forming means indicated generally by the numeral 14.
  • a sliver 16 of staple fiber is drawn into the unit and is converted therein to a yarn 18.
  • the yarn is withdrawn from unit 10 by means of the withdrawal means 12 and is forwarded to the package forming means 14 at which it is wound into a package 20.
  • the spinning unit 10 is of a type very well known in the rotor spinning art. Details can be omitted. The general type of spinning unit involved can be seen from US Patent Specifications 3511045 and 4009562.
  • Fig. 1 shows the outline of a unit housing 22 which is pivotally mounted on a tube 24 which extends over the full length of one machine side being fixed in the machine frame and common to all spinning stations on the one machine side. Extending through the bore of tube 24 is a worm gear 26 also extending along a complete machine side.
  • Feed roller 30 draws the sliver 16 into the spinning unit and presents the sliver to an opening roller 32 having pins or teeth to comb individual fibers out of the presented sliver end.
  • the fibers extracted from the sliver are forwarded by an airstream to a rotor 34.
  • Opening roller 32 is driven by a whorl 36 project ing from the underside of the housing 22 so as to be engageable with a drive belt (not shown) common to all of the spinning stations.
  • Rotor 34 is carried by way of a bearing unit 38 on a carrier 40 which is pivotally connected to the housing 22.
  • Fig. 1 shows the parts in their normal operating disposition in which housing 22 is latched in an "upright” disposition and carrier 40 holds the axis of rotor 34 substantially horizontal.
  • Housing 22 can be unlatched and tilted forwardly (that is, in an anti-clockwise direction) on its pivot mounting on tube 24 and carrier 40 can simultaneously pivot rearwardly (in a clockwise direction) on its pivotal connection with housing 22.
  • the rotor unit (34, 38, 40) can be separated from the fibre feed system (30, 32) for ready access to the interior of the rotor.
  • the air stream which draws fibers from the opening roller 32 to the rotor 34 is created by a vacuum applied to the housing 22 for example as indicated at 42.
  • a feed and guide tube leads the fiber - carrying air stream from the opening roll through a rotor cover (not shown) into the rotor interior where the fibers are separated from the carrying air by centrifugal force and are laid as a fiber ring in the so called "rotor groove" at the maximum interior diameter of the rotor.
  • the air escapes over the rotor rim and is removed by the suction system (not shown).
  • the formed yarn is withdrawn from the rotor via a withdrawal tube 44 which extends at its upstream end through a withdrawal nozzle 46 mounted in the rotor cover.
  • a pivotable monitor 48 is also of a well known type comprising a lever pivoted to swing on an arc which intersects the normal yarn path. The lever is biased towards one position on its arc and is maintained spaced from that position by the normally running yarn. If the yarn breaks, or the yarn tension drops severely, the lever is pivoted under its bias to close a switch indicating a fault condition.
  • a monitor is shown, for example, in US Patent No. 3404524.
  • the yarn passes to the withdrawal means 12 which comprises a guide 50, a drive roller 52 and a pressure roll 54.
  • Guide 50 reciprocates the yam over a slight traverse axially of the withdrawal rollers 52, 54 to avoid persistent wear at one location of those rollers.
  • the primary withdrawal function is performed at the nip normally formed between the rollers 52 and 54.
  • Roller 52 extends along the complete side of the machine, being common to all stations. It is driven in a clockwise direction about its own axis, as indicated by the arrow in Fig. 1.
  • At each spinning station there is a respective pressure roller 54 mounted by a carrier arm on a rod 56 extending the full length of the machine side.
  • the carrier arm is pivotable on the rod 56 to move the roller 54 from the full line position to the dotted line position.
  • the roller 54 is in its full line position in which it engages roller 52 to form a nip therebetween.
  • the yam 18 is withdrawn from the spinning unit by means of this nip and the drive on the roller 52.
  • the withdrawal speed is determined by the speed of rotation of the roller 52.
  • the package forming means 14 comprises a fixed guide 58, a traversable guide 60 and a drive roller 62.
  • Guide 60 is traversed (by means not shown) axially of the package 20. The latter normally rests in frictional engagement with the roller 62 which extends along a full machine side and is common to all spinning stations. Roller 62 is driven to rotate clockwise as viewed in Fig. 1 about its own longitudinal axis, thereby rotating the package in a anti-clockwise direction.
  • the traverse motion of the guide 60 enables formation of a cross-wound package.
  • the portion of guide 58 which contacts the yarn is formed to even out yarn length variation which would otherwise occur during the traverse motion. This general arrangement is also very well known in the art.
  • Package 20 is formed on a bobbin tube 64 carried between a pair of arms of a package cradle. Only one arm 66 can be seen in Fig. 1. The arms are pivotable together about a pivot mounting 68 on the machine frame, part of which is shown at 70.
  • the thread break signal issued by the monitor 48 causes operation of a mechanism (not shown) to lift the package 20 to the position illustrated in dotted lines in which it is clear of roller 62.
  • the latter continues in rotation to drive the packages at the other spinning stations, but rotation of the package ceases at the station with the broken thread.
  • the thread break signal also opens the clutch 28, so that feed of sliver 16 also ceases.
  • the drive to the gear 26, whorl 36, rotor 34, withdrawal roll 52, and traverse guide 60 continues.
  • a call signal is also issued to cause the automatic piecer 72 to stop in alignment with the illustrated station.
  • piecer 72 carries out a piecing operation which basically involves finding the broken thread end on the package 20 and feeding it back down the withdrawal tube 44 to rejoin that end with a newly formed ring of fibers in the rotor groove.
  • a piecing operation basically involves finding the broken thread end on the package 20 and feeding it back down the withdrawal tube 44 to rejoin that end with a newly formed ring of fibers in the rotor groove.
  • withdrawal of the newly formed yarn must be restarted.
  • control of the three operations is critical and extremely difficult to achieve at least with rotor speeds substantially higher than 50'000 RPM.
  • the piecings, or joins, obtained from the currently available devices do not always meet the requirements of the further processing industries, and the piecing is frequently cut out and replaced by a knot or a splice after spinning at the spinning unit has been successfully restarted.
  • the dotted lines extending between the piecing device 72 in Fig. 1 and the spinning station in that Figure indicate the main points at which the piecing device intervenes in the spinning station to effect piecing.
  • the piecer takes over control of the position of the package 20 relative to the friction roller 62 as indicated by line 74 joining the piecer to package holder arm 66.
  • the piecer can be provided with a suitable lever for this purpose.
  • the piecer also lifts pressure roller 54 away from drive roller 52 and moves it to the dotted line position as indicated by the line 76 joining the piecer to that position.
  • the piecer can be provided with a suitable lever for this purpose.
  • the piecer further forms a yarn reserve which is a defined length of yarn, the length of the reserve being equal to the distance through which the yarn end will move in the last stage of the piecing operation in order to bring it into contact with the fiber ring in the rotor groove.
  • the piecer locates a reserve forming device 78 adjacent the exit end of the withdrawal tube 44.
  • the piecer may have a device for sensing the speed of rotation of the rotor. The device is indicated by the dotted line 80 in Fig. 1 and a suitable arrangement will be described below.
  • the piecer also has a means (indicated by the dotted line 82) for controlling operation of the clutch 28.
  • the piecer 72 is also provided with certain elements which have not been shown in Fig. 1.
  • the yam is threaded between the separated nip rollers 52, 54 and into the reserve forming device 78.
  • the final backfeed phase which is performed under the control of the reserve device 78, carries this yarn end from the nozzle 46 into the rotor groove.
  • the piecer further includes a rotor cleaning device.
  • the device will not be described in the present application but can be formed, for example, in accordance with our US Patent No. 4403472.
  • Cleaning of the rotor is performed simultaneously with the end seeking operation.
  • the spinning unit In order to perform the cleaning operation, the spinning unit must be opened in order to provide access to the rotor interior and the rotor must be braked to a standstill.
  • the dotted line yam path shown in Fig. 1 and the location of the yam end within the nozzle 46 are established after reclosing of the spinning unit following completion of the cleaning operation. At that time, also, drive will be reestablished with the rotor, which will begin to accelerate towards its normal operating speed.
  • Piecer 72 also includes a control means 84 which controls all functions of the piecer according to a predetermined sequencing program. Certain aspects of the program will be described in further detail with reference to the more detailed mechanisms. However, particular attention will first be paid to the final stage of the piecing operation, in which-
  • the vertical axis represents speed and the horizontal axis represents time.
  • the line R represents the speed of the rotor, and the line Y represents the speed of the yarn end/piecing.
  • the scale of the diagram is different for the rotor speed and the yarn speed, since only the principle is of importance.
  • the rotor is assumed to be reconnected with its drive after the cleaning operation.
  • the rotor speed then follows an acceleration curve which will be dependent upon the overall design of this system and which will be inevitably subject to minor variations from one station to another because of manufacturing and assembly tolerances.
  • the control 84 provides a start signal to start the final piecing stage. The issuance of the start signal is dependent upon the completion of the preliminary piecing operations referred to above which will normally last longer than the acceleration time of the rotor R.
  • the control 84 now defines a predetermined time T during which the formation of the fiber ring, the backfeed of the yarn end and joining of the yarn to the fiber ring can occur. At the expiry of this time T, the roller 54 has again engaged the roller 52 so that withdrawal of yarn from the spinning unit is commenced.
  • backfeed is as sumed to be initiated as soon as the start signal is issued. There can be a delay between the start signal and initiation of backfeed.
  • Device 78 is operated to provide a controlled backfeed such that the yarn is continually tensioned along its length during the backfeed operation and so that the yarn end arrives in the groove with a slight time advance relative to the start of yarn withdrawal.
  • the corresponding time advance is indicated at t. The time advance may be greater or less depending upon delay in initiation of the backfeed.
  • Factor a) is dependent upon the backfeed speed in relation to the rotor speed and factor b) is depend ent upon the length of the advance referred to above, that is the duration of the "rest" period during which the yarn end remains in the groove waiting for yam withdrawal to begin.
  • the degree of twist transference can be controlled by controlling both factors a) and b) above, but we prefer to apply the main control via factor b) (that is by adjustment of the rest period) and to hold factor a) constant (that is to maintain constant backfeed speed for all piecing operations).
  • factor b) that is by adjustment of the rest period
  • factor a) constant that is to maintain constant backfeed speed for all piecing operations.
  • the rest period required in practice is of extremely small duration (up to 10 millisecs.) and it is impractical to initiate the mechanical operations involved in yarn withdrawal within the very short time available after sensing of completion of the backfeed movement
  • initiation of withdrawal by reference to the start signal and to define the duration of the rest period by reference to the delay (or lack of it) between the start signal and the initiation of the backfeed movement.
  • the required duration of the rest period will depend upon the operating circumstances, and in particular upon the rotor speed and yarn count. A heavier yarn count will require greater twist transference and thus a longer rest period.
  • Closing of the clutch 28 is also preferably effected by reference to the same start signal. Closing of the clutch must be effected at a stage of the piecing sequence such that a fiber ring of the required dimensions is available in the groove during the rest period to join with the yarn end. The actual stage of the sequence at which initiation of fiber feed must be effected will depend upon many factors including the mechanical design of the system and the yarn count. Frequently, fiber feed must be commenced before start of the backfeed movement and the total time T must then be settable to allow for an initial "feed delay" following the start signal, plus the time required for the backfeed movement plus the required rest period.
  • Figs. 3 and 4 show the package forming means 14 and some further details of its association with the piecer 72.
  • control of the positioning of the package 20 is taken over from the spinning machine by a lever 86 on the piecer.
  • Lever 86 acts on the outer end region of arm 66 and the piecer lever 86 is pivotable by a piston and cylinder unit 88 about a pivot mounting on the piecer from a starting position indicated by the dotted line 86A.
  • the package lift-off mechanism on the machine always lifts the package 20 through a predetermined distance H away from the friction roll 62 regardless of the size of the package (packages of totally different size are indicated by the full line and the dotted line circles 20 in Fig. 3).
  • the angle through which lever 86 must traverse from its starting position 86A in order to reach the lever 66 is therefore dependent upon the size of the package when the threadbreak occurred. This angular position of the arm 86 at the time it engages the arm 66 is registered and is maintained by the piecer during the subsequent end seeking operation.
  • the arm 86 If the arm 86 has to be moved slightly beyond this initial engagement position (for example, to enable release of the package lift mechanism on the machine) then the arm 86 is brought back to its initial engagement position in time for commencement of the end seeking operation.
  • the "underside" of the package is at a designed spacing from the friction roller 62 regardless of the package size.
  • a yam end seeking nozzle 90 can be moved to the position indicated in full lines in Fig. 3 in which a mouthpiece on the nozzle is located in close association with the underside of the package. Suction is applied to the nozzle 90 via a flexible connection with suction 91, and a broken yarn end on the package is drawn into the nozzle. Successful finding of the yam is registered if necessary by a light beam emitted across the nozzle interior and interrupted by a found yarn end. If the yarn end sensor associated with the nozzle has not sensed the yarn therein after a predetermined time delay following initiation of the yarn seeking operation, then the control 84 terminates both the yarn seeking operation and the piecing operation and the station is accounted faulty. The station can be "marked" in a suitable manner so that service personnel can attend to the defect. The piecer can proceed to service other stations.
  • nozzle 90 is moved away from the package 20 towards the dotted line position shown in Fig. 3, thereby creating a length L of yam which will be accessible to a threading device to be further described below.
  • package 20 is rotated in the reverse direction by means of a roller 92 engaging the upper side of the package.
  • Roller 92 is carried by a lever 94 pivotably mounted on the piecer 72, and an appropriate controllable drive means (not shown) is provided to rotate the roller.
  • Fig. 4 shows the package 20 viewed from the direction of the piecer 72 and from above.
  • the suction nozzle is assumed to be withdrawn from the package so that the yarn length L has been created, but the orientation of this yam length L relative to the central line C of the spinning station is completely uncontrolled immediately after the withdrawal of the suction nozzle. Accordingly, a yarn centering mechanism 96 is used to bring the yarn length L into the full line disposition indicated on Fig. 4.
  • Mechanism 96 comprises a carrier bar 98 which is reciprocable at right angles to the centre line C of the spinning station.
  • Bar 98 carries a cantilever rod 100 which carries two thread guide elements 102, 104 respectively.
  • Guide 102 has a yarn receiving slot 106 and guide 104 has a yarn receiving slot 108.
  • Mechanism 96 is illustrated in Fig. 4 in its start position immediately after withdrawal of nozzle 90. Completion of nozzle withdrawal is indicated by suitable sensor which triggers movement of bar 98 to the right as viewed in Fig. 4 from its starting position. The extent of the right ward movement of bar 98 is sufficient to traverse slot 106 of guide 102 across the yarn length L, wherever that yarn length may happen to be lying following the seeking operation.
  • the leading edge 110 of the guide 102 during this outward movement from the starting position is formed as a guide edge to direct the thread downwardly and over a lower-lip 112 into the slot 106.
  • the other side of the slot 106, and the trailing edge of the guide 102, is formed by a downwardly projecting finger 114, which projects slightly below the lip 112 to ensure that the thread is guided into the slot 106.
  • Guide 104 is formed similarly to guide 102, but the guide slot 108 of guide 104 leads the guide slot 106 of the guide 102 during the outward movement by a small distance d. Since the stroke of the outward movement of bar 98 is sufficient to sweep the trailing slot 106 across the yarn length L, the yarn length is located in both slots 106 and 108 on the completion of the outward stroke.
  • the bar 98 now begins a return stroke (to the left as viewed in Fig. 4) towards its starting position. This return stroke is, however, interrupted when the finger 114 of the guide 102 is located in alignment with a recess 116 provided in the upwardly facing surface of the guide member 58 of the machine.
  • Bar 98 is now pivoted slightly about its own longitudinal axis so as to bring the tips of parts 112 and 114 into the recess 116; accordingly, as viewed longitudinally of the yarn length L, the slot 106 is closed by the upwardly facing surface of guide member 58 and the yarn length L is effectively guided by this "closed" slot 106 without any risk of jamming of the yarn between the finger 114 and the surface of the guide member 58 or escape of the yarn between the lip 112 and the surface of the guide member 58.
  • the yarn length L still remains, however, in the slot 108 of the second guide 104 and because of the relative dispositions of the slots 106, 108 at this stage, the yarn length L intersects the centre line C at a slight angle as indicated in Fig. 4.
  • the portion of the yarn length L lying between the guides 102 and 104 is therefore accessible to the guide slot 118 (Fig. 5A) of a threading pin 120 which is moved along a threading path 122 (Fig. 5) such that the slot 118 travels along the centre line C of the spinning station.
  • the pin 120 rises along the rearward portion (piecer side) of its path 122 between the guide 104 and the bar 98, reaches a peak P on its path slightly thereafter and begins its downward travel by intersecting the yarn length L at the point X.
  • pin 120 In continuing its downward travel after taking up the yarn length, pin 120 sweeps out the forward portion (machine side) of its illustrated path 122. In doing so, the pin 120 passes between the drive roller 52 and the raised pressure roller 54, through an array of thread guides (further described below) in the reserve forming device 78, past a yarn clamp 124 and around an abrading roller 126. After passing the point X, pin 120 carries with it yarn which is being continuously delivered by the reverse rotation of package 20 referred to above. The yarn length extending between pin 120 and package 20 is carried by the pin along the path 122 lying on the centre line C (Fig. 4). This yarn is therefore laid by the pin 120 on a yarn path Z 1 (Fig.
  • diverting means (not shown) diverts the yarn extending between the pin and the nozzle 90 so that this diverted yarn is not laid along the path Z but is continually taken up by the suction nozzle.
  • Pin 122 is cantilevered from its mounting means so that slot 118 is provided adjacent its free end.
  • the pin 120 can thus project freely into the spaces between rollers 52, 54 and within the reserve device 78.
  • the moving means can be a lever system operated from suitable cam plates 123 as is well known in the art of production of automatic yarn piecing devices.
  • Fig. 6 - 9 inclusive show the series of mutations of the yarn path following completion of the threading operation.
  • the pressure roll 54 is relatively widely spaced from the drive roll 52, the reserve device 78 is in a "receiving" condition and the clamp 124 is still open so that the yarn can continue to pass to the suction nozzle.
  • a sensing system (not shown) senses completion of one circuit of the path 122 by pin 120, whereupon reverse rotation of the package 20 is terminated, roller 54 is brought to a position close to but still spaced from roller 52, reserve device 78 is adjusted to its "end preparation" condition and clamp 124 is closed. This gives the yam path Z 2 shown in Fig. 7 with the yarn still extending beyond the abrading roller 126 along the dotted line portion of the path.
  • Reserve device 78 changes from its receiving to its end preparation condition by means of a rightward shift of a yarn guide 130 relative to a pair of yarn guides 128, 132 so that a loop of thread is formed between the guide pair 128, 132.
  • a second yarn clamp 134 (Fig. 7 - 9) is moved to a position immediately downstream from the rollers 52, 54 and clamps the thread. For reasons which will be explained later, this second clamp is brought as close as possible to the rollers 52, 54.
  • the abrading roller 126 is driven into rotation anti-clockwise as viewed in Fig. 7 and cuts the yarn leaving a tail 136 of an accurately defined length extending from the clamp 124. The portion of the yarn not held by the clamp 124 is taken up by the suction nozzle 90. There is now an accurately defined length of yarn between the clamp 134 and the free end of the tail 136.
  • abrading roller 126 is such as to form a "prepared" yarn end which is particularly suitable for eventual joining with the fiber ring in the rotor.
  • Such rollers are already well known in the art and will not be described in detail - see for example US Specification 3934394.
  • Clamp 124 is carried by a lever 138 (Fig. 5) which is pivotally mounted in the piecer 72. After completion of the yarn end preparation step, lever 138 is pivoted on its mounting to bring clamp 124 to a position immediately above the exit opening from withdrawal tube 44 (Fig. 8).
  • the relative positions of guides 128, 130 and 132 in reserve device 78 are adjusted continually to maintain the length of thread between the clamps 134 and 124 taut and under substantially constant or at least controlled tension.
  • the yarn lies on the path Z 3 shown in Fig. 8 with a tail 136 lying within the mouth of withdrawal tube 44. No attempt has been made in these Figures to represent accurately the geometry of this system required to produce the effect described.
  • the diagrams merely illustrate the principles involved.
  • the geometry of movements of the guides 128, 130 and 132 in order to compensate for the pivotal movement of the clamp 124 can be developed from the stated requirement of control of the yarn length between the clamps 124 and 134.
  • Fig. 3 - 9 inclusive can be controlled conveniently by a set of rotatable cam plates and levers controlled by suitable cam followers, the plates being rotated as a set. Such systems have been commonly used in the design of automatic piecers currently available and are not believed to require detailed description here.
  • the movement described with reference to Fig. 2 are not, however, controlled by cam plates but by triggerable mechanisms.
  • a suitable mechanism for the reserve device 78 is shown in Fig. 10.
  • Guide 132 is carried by a rod 138 coupled with a piston 140 in a cylinder 142.
  • a second rod 144 projects from the other side of piston 140.
  • Piston 144 can be latched in its illustrated position by a latch element 146 releasable by a release mechanism 148 upon receipt of a predetermined signal.
  • Piston 140 adopts the illustrated position and is latched therein at the completion of the preliminary operations, that is when the yarn is on path Z 4 shown in Fig. 9 and Fig. 1.
  • Piston 140 is pressurized via air inlet 150 to cylinder 142. Port 152 is vented.
  • piston 140 and therefore guide 132 are urged to the right as viewed in Fig. 10 at a speed which is controllable by adjustment of the pressure applied at the inlet 150.
  • Cylinder 142 is movable by the cam plates for the preliminary piecing operations.
  • a strong bias is normally applied by means of a suitable spring acting between the carrier rod 56 (see also Fig. 1) for roller 54 and the cantilever arm 156 which carries the roller at its free end. This bias urges roller 54 towards its nip position with roller 52.
  • the free end of arm 156 is also provided with an abutment surface 158 which is engaged in the "ready" condition of Fig. 9 by a latch 160 having an associated release mechanism 162 responsive to a release signal which, as will be described, is related to the start signal referred to above in description of Fig. 2.
  • the rotatable cam which moves roller 54 away from roller 52 to its threading position (Fig. 6) and back to its ready position (Fig. 7 and Fig. 11) also acts via a lever 159 (dotted lines Fig. 11) upon the surface 158, but the lever is arranged to move away from that surface when the arm 156 reaches its ready position (Fig. 11).
  • the latch 160 retains the arm 156 in the ready position, however, until the release signal is received.
  • Fig. 12 shows a part of the control 84 designed for producing the release signals.
  • the Figure is in the form of a block diagram, block PC representing a programmable controller.
  • controller PC sends an output to clock CL which then provides output pulses at a predetermined rate to each of coun ters CF, CB and CW.
  • Each of these counters is individually settable to provide a respective output signal when it reaches its respective set count.
  • the output signal from counter CF is fed to a mechanism operating clutch 28 to cause operation of feed roller 30 and feed of fibers into the rotor.
  • the output of counter CB is fed to the release mechanism 148 to release the yarn reserve device 78 and the output of counter CW is fed to the release mechanism 162 to release the roll carrier arm 156.
  • the timing means constituted by the clock and counters in Fig. 12 does not determine alone the period T shown in Fig. 2. That period is dependent also on the mechanical performance particularly of the trigger mechanisms and the bearing by which arm 156 is mounted upon rod 56.
  • backfeed of the yarn is completed before withdrawal of newly spun yarn is begun. It is important that a controlled length of backfed yarn should penetrate into or overlap with the fibers in the rotor groove in order to ensure adequate twist transference from the yarn to those fibers. It is thus important to provide a carefully controlled length of yarn from the clamp 134 (Fig. 9) to the prepared yarn end. Furthermore, the location of clamp 134 as close as possible to, but downstream from, the nip rolls 52, 54 helps to minimize this defined yarn length. This in turn assists in reducing variability which might be introduced due to variable stretchability of different yarn types. Some stretching of the yarn must be anticipated.
  • Clamp 134 is released automatically by linkage (not shown) to the return movement of the nip roll to forward yarn to the package 20.
  • package 20 is simultaneously returned to the friction roll 52.
  • the temporary yarn store described above with reference to Fig. 1 can be operated by the set of rotatable cam plates also referred to above. Although not shown in the drawings, the store can be brought against the yarn path Z 4 downstream from the clamp 134. Suitable temporary stores, preferably in the form of a suction tube with an open end immediately adjacent the yarn path are already well known in the art, see for example US Specification 4223518.
  • low speed piecing (whether it is effected on the rotor acceleration curve or at a predetermined constant speed which is lower than the normal operating speed) introduces complication in matching the fiber feed and the withdrawal speed to the rotor speed as the rotor accelerates from its piecing speed to its normal operating speed after a successful piecing operation.
  • the failure of such matching results in production of a substantial length of yam having a totally different character from the yarn produced at normal rotor speed.
  • the matching process necessitates, however, direct intervention of the piecer in control of the relevant spinning station to control its operating characteristics during the acceleration phase.
  • the principles described with reference to Fig. 2 enable as many features as possible to be held constant, reducing variability in the piecing process.
  • the rotor speed is held constant during the piecing operation, preferably at the normal operating speed so that no subsequent matching of feed and withdrawal speeds has to be effected during a rotor acceleration phase.
  • the performance of the backfeed system is also held constant.
  • the length of yarn backfed can also be held constant despite variation in the rotor diameter.
  • the prepared yarn end should not penetrate the rotor space, that is it should not leave the withdrawal nozzle before the start of the final piecing phase.
  • the yarn end can, however, be withdrawn from the nozzle end by a suitable amount when a rotor of smaller diameter than the maximum designed rotor diameter is in use. Maintenance of these constant conditions enables the piecer to obtain close control over the final piecing phase and also enables the piecer to use the withdrawal system of the spinning station, despite minor variability from station to station.
  • the system is not limited to details of the mechanisms shown in the Figures. Nor is it limited to dealing with piecing of a broken end which has wound up on a package.
  • the piecer Upon starting up of a machine, or after doffing of a full package, it may be necessary for the piecer to restart the spinning operation when there is no yarn already available at the spinning station itself.
  • the piecer can carry an auxiliary yarn package (171, Fig. 4) from which yarn can be drawn for insertion into the spinning unit to piece with a fiber ring formed in the rotor of the unit.
  • auxiliary yarn can then be transferred to a bobbin tube inserted in the package cradle of the spinning station, and the auxiliary yarn can be separated from the piecer so that further take-up is effected by the station.
  • Such systems have been proposed, for example, in Swiss Specification 606533.
  • the dotted line illustration to the right of the main diagram shows a means for introducing the auxiliary yarn to the threading system.
  • 172 is a yarn feed means drawing yarn from the auxiliary supply.
  • 174 is a yarn manipulating means which includes a yarn take-up means, for example a suction nozzle.
  • mechanism 96 draws the auxiliary yarn into the "threading position" already described in relation to a broken end and indicated at L in Fig. 4. Suction is simultaneously applied to nozzle 90 at a level sufficient to draw a loop of auxiliary yarn (indicated in dotted lines at 176A) into the nozzle between forwarding means 172 and guide 104. Threading of auxiliary yarn into the piecing system is identical to threading of a broken end; however, a knife (not shown) in forwarding means 172 is operated simultaneously with the abrading roller, so that the loop of thread drawn into the nozzle is taken up thereby.
  • Forwarding means 172 preferably includes both a positive forwarding means (e.g. a driven roller pair) and an air stream to direct the yarn end to the nozzle in means 174.
  • Package 171 is replaceably supported on a carrier 169 mounted in the tender and enabling required withdrawal of yarn from the package.
  • the forwarding means is operated to forward thread from package 171 until the yarn has been clamped by clamp 124.
  • the suction nozzle in means 174 draws yarn continuously, but is of course ineffective to move the thread while either of clamps 124,13.4 is effective.
  • manipulating device 174 is moved by means (not shown) to connect the yarn to a bobbin tube in the wind-up system.
  • manipulating device 174 is moved by means (not shown) to connect the yarn to a bobbin tube in the wind-up system.
  • Devices to enable this are known in the art, and will not be described here.
  • a novel device for this purpose is described in our co-pending Patent Application No. 84 105 036.2, the disclosure of which is hereby incorporated in the present specification by reference.
  • the present invention is not limited to use in conjunction with the system disclosed in that co-pending application.
  • Control of movements of the means 174 and of the centering mechanism 196 is effected by the cam set 123 referred to above. Control of the application of suction and of the knife in the forwarding means 174 is effected by controller 84.
  • auxiliary seed yarn is introduced to the main piecing system at the most convenient stage thereof, namely immediately prior to the threading step.
  • Mechanism 96 and nozzle 90 can be considered as arranged to present an accessible length of seed yarn to the threading element, and the manipulating means 174 brings the auxiliary seed yarn into operative relationship with this presenting means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Claims (10)

1. Wander-Ansetzapparat für eine Rotor-Offenend-Spinnmaschine mit einer Mehrzahl von Spinnstationen, welche je eine Spinneinheit (10) umfassen, mit je einem Rotor (34) und mit Spulenbildungsmitteln (14), um eine Spule aus einem in der Spinneinheit (10) hergestellten Faden zu bilden sowie mit einem Abzugswalzenpaar (52, 54) für das Abziehen des Fadens aus der Spinneinheit (10) und das Liefern an die Spulenbildungsmittel (14), wie auch mit wahlweise betreibbaren Einspeisemitteln (30), um Fasern in die genannte Einheit (10) zu speisen, um daraus einen Faden zu spinnen, sowie mit Antriebsmitteln, um den Rotor (34) mit einer vorgewählten Betriebsgeschwindigkeit anzutreiben und um die Spulenbildungsmittel (14), die Abzugswalzen (52, 54) und die Einspeisemittel (30) je in einer entsprechenden, in einem vorgewählten Verhältnis zur genannten Betriebsgeschwindigkeit stehenden Geschwindigkeit anzutreiben, wobei der genannte Ansetzapparat (72) Mittel (76) für das Voneinanderbringen der genannten Abzugswalzen (52, 54) beinhaltet, gekennzeichnet durch Mittel (78), um eine Fadenreserve in einem Einspeisefaden zu bilden und um diese Fadenreserve für die Rückspeisung in den Rotor (34) gesteuert loszulassen, und durch Mittel (82), um die genannten Einspeisemittel (30) zu starten, sowie durch Steuermittel (84), welche auf den Zustand der Spinneinheit (10) reagieren und betreibbar sind, wenn die Spinneinheit (10) in einem vorgegebenen Zustand ist, in welchem eine vorgegebene Sequenz eingeleitet wird, nämlich,
- Betrieb der Einspeisemittel (30)
- Betrieb der genannten Fadenreservemittel (78), um die genannte Reserve loszulassen, und
- Zusammenbringen der genannten Abzugswalzen (52, 54), um das Abziehen des Einspeisefadens und des daran angesponnenen Fadens zu bewerkstelligen,

wobei die Steuermittel (84) Zeitmittel (Fig. 12) beinhalten, um den Zeitpunkt für den Start des genannten Zusammenbringens auf Grund einer Zeitbasis (Fig. 2) festzulegen.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Zeitmittel (Fig. 12) betreibbar sind, um den Start des Betriebes der Fadenreservemittel (78) von derselben Zeitbasis (Fig. 2) durchzuführen.
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die genannten Steuermittel (84) betreibbar sind, um die genannte Sequenz zu starten, nachdem die Spinneinheit (10) ihre vorgewählte Betriebsgeschwindigkeit erreicht hat.
4. Vorrichtung nach irgendeinem der Ansprüche 1-3, dadurch gekennzeichnet, daß die genannten Trennmittel (76) lösbare Rückhaltemittel (162) beinhalten, welche betreibbar sind, um die Abzugswalzen (52, 54) in einem geöffneten Zustand, entgegen der Wirkung der Anpreßmittel (154), welche die Abzugswalzen (52, 54) in den geschlossenen Zustand drängen, zu halten.
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Trennmittel (76) Mittel (159) beinhalten, welche betreibbar sind, um einen relativ großen Abstand zwischen den Abzugswalzen (52, 54) für das Einspeisen eines Einspeisegarnes dazwischen zu ermöglichen, wobei die genannten Rückhaltemittel (162) betreibbar sind, um einen relativ kleinen Spalt zwischen den Abzugswalzen (52, 54) aufrechtzuerhalten.
6. Vorrichtung nach irgendeinem der Ansprüche 1-5, dadurch gekennzeichnet, daß die Reservemittel (78) Kraftmittel (140, 144) beinhalten, welche das Freilassen des Fadens in der Reserveposition ergeben und Rückhaltemittel (148), welche die Reserve entgegen des Effektes der Kraftmittel (140, 144) aufrechterhält.
7. Vorrichtung nach irgendeinem der Ansprüche 1-6, dadurch gekennzeichnet, daß Mittel (124, 134) vorgesehen sind, um eine vorgegebene Einspeisegarnlänge zu definieren, welche sich zwischen den Abzugswalzen (52, 54) und in den Reservemitteln (78) und an den Mitteln (138) befindet, um den genannten Ansetzfaden in die Spinneinheit (10) zu bringen, wobei die Reservemittel (78) angewendet werden, um den Ansetzfaden auf der Länge L gespannt zu halten.
8. Verfahren für das Fadenansetzen an einer Rotor-Offenend-Spinnmaschine mit einer Mehrzahl von Spinnstationen, welche je eine Spinneinheit (10) umfassen, mit je einem Rotor (34) und mit Spulenbildungsmitteln (14), um eine Spule aus einem in der Spinneinheit (10) hergestellten Faden zu bilden, sowie mit einem Abzugswalzenpaar (52, 54) für das Abziehen des Fadens aus der Spinneinheit (10) und um in die Spulenbildungsmittel (14) zu liefern, wie auch mit wahlweise betreibbaren Einspeisemitteln (30), um Fasern in die genannte Einheit (10) zu speisen, um daraus einen Faden zu spinnen, sowie mit Antriebsmittel, um den Rotor (34) mit einer vorgewählten Betriebsgeschwindigkeit anzutreiben und um die Spulenbildungsmittel (14), die Abzugswalzen (52, 54) und die Einspeisemittel (30) je in einer entsprechenden, in einem vorgewählten Verhältnis zur genannten Betriebsgeschwindigkeit stehenden Geschwindigkeit anzutreiben, wobei das genannte Verfahren die Verfahrensschritte beinhaltet, in welchen die Abzugswalzen voneinandergebracht und ein Einspeisefaden mittels dieser Abzugswalzen eingespeist und durch die Verfahrensschritte gekennzeichnet ist, daß eine Reserve in diesem Einspeisegarn gebildet und die Reserve freigegeben wird und dabei das Einspeisegarn aus der genannten Reserve in den Rotor gespeist wird, um einen sich im Rotor befindlichen Faserring zu erreichen und, daß das Einspeisegarn mit dem daran neu gebildeten Garnstück durch Zusammenbringen der Abzugswalzen abgezogen wird und, daß eine vorgegebene Zeitperiode (T, Fig. 2) definiert wird, während welcher das genannte Zurückspeisen des genannten Garnes geschieht, wobei nach Abschluß dieser Zeitperiode das Abziehen des Einspeisefadens beginnt.
9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß dieses den Verfahrensschritt beinhaltet, daß die Geschwindigkeit der Spinneinheit (10) während der genannten Periode (T, Fig. 2) konstantgehalten wird.
10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß die Spinneinheit während der genannten Periode (T, Fig. 2) in einer vorgewählten Betriebsgeschwindigkeit betrieben wird.
EP86106880A 1983-05-20 1984-05-05 Wiederanspinnen in Offenend-Spinnmaschinen Revoked EP0203508B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86106880T ATE54683T1 (de) 1983-05-20 1984-05-05 Wiederanspinnen in offenend-spinnmaschinen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB8313993 1983-05-20
GB08313993A GB2140042B (en) 1983-05-20 1983-05-20 Open-end yarn piecer
GB8333471 1983-12-15
GB838333471A GB8333471D0 (en) 1983-12-15 1983-12-15 Spinning machine tenders

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP84105073.5 Division 1984-05-05

Publications (3)

Publication Number Publication Date
EP0203508A2 EP0203508A2 (de) 1986-12-03
EP0203508A3 EP0203508A3 (en) 1987-12-16
EP0203508B1 true EP0203508B1 (de) 1990-07-18

Family

ID=26286183

Family Applications (4)

Application Number Title Priority Date Filing Date
EP86106879A Revoked EP0198516B1 (de) 1983-05-20 1984-05-05 Wiederanspinnen in Offenend-Spinnmaschinen
EP84105073A Expired EP0127017B1 (de) 1983-05-20 1984-05-05 Vorrichtung zur Fadenbruchbehebung in einer Offen-Ende-Spinnmaschine
EP86106880A Revoked EP0203508B1 (de) 1983-05-20 1984-05-05 Wiederanspinnen in Offenend-Spinnmaschinen
EP86106878A Expired - Lifetime EP0197564B1 (de) 1983-05-20 1984-05-05 Wiederanspinnen in Offenend-Spinnmaschinen

Family Applications Before (2)

Application Number Title Priority Date Filing Date
EP86106879A Revoked EP0198516B1 (de) 1983-05-20 1984-05-05 Wiederanspinnen in Offenend-Spinnmaschinen
EP84105073A Expired EP0127017B1 (de) 1983-05-20 1984-05-05 Vorrichtung zur Fadenbruchbehebung in einer Offen-Ende-Spinnmaschine

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP86106878A Expired - Lifetime EP0197564B1 (de) 1983-05-20 1984-05-05 Wiederanspinnen in Offenend-Spinnmaschinen

Country Status (5)

Country Link
EP (4) EP0198516B1 (de)
KR (1) KR850000542A (de)
DE (4) DE3482775D1 (de)
ES (1) ES8505741A1 (de)
IN (1) IN161183B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5473879A (en) * 1993-04-24 1995-12-12 W. Schlafhorst Ag & Co. Open-end spinning machine for producing cross-wound bobbins
EP0716169A2 (de) 1994-12-09 1996-06-12 W. SCHLAFHORST AG & CO. Kreuzspulen herstellende Textilmaschine
US5681000A (en) * 1994-09-14 1997-10-28 W. Schlafhorst Ag & Co. Servicing apparatus for a yarn package-producing textile machine

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8500120D0 (en) * 1985-01-03 1985-02-13 Rieter Ag Maschf Bobbin loading apparatus
US4655665A (en) * 1985-02-06 1987-04-07 Machinenfabrik Rieter Ag Bobbin magazine for a travelling service device of a yarn processing machine
GB8510842D0 (en) * 1985-04-29 1985-06-05 Rieter Ag Maschf Open end yarn piercer
JP2005080385A (ja) * 2003-08-29 2005-03-24 Toshiba Corp 情報処理装置及び情報処理装置のバッテリ残容量表示方法

Family Cites Families (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT267375B (de) 1965-11-16 1968-12-27 Vyzk Ustav Bavlnarsky Maschine für das kontinuierliche Spinnkammer Spinnen von Textilfasern
AT268941B (de) 1966-03-19 1969-02-25 Vyzk Ustav Bavlnarsky Fadenbruch-Wächtereinrichtung
GB1191668A (en) 1966-11-08 1970-05-13 Tmm Research Ltd Improvements relating to the Spinning of Textile Yarns
FR1550884A (de) 1967-01-17 1968-12-20
CH485876A (de) 1968-01-22 1970-02-15 Elitex Zavody Textilniho Maschine zum ringlosen, kontinuierlichen Feinspinnen von Garn
US3601969A (en) * 1968-02-02 1971-08-31 Toray Industries Method and apparatus for performing an open-end spinning operation
US3486319A (en) * 1968-06-24 1969-12-30 Parks Cramer Co Apparatus and method for detecting,piecing-up and reporting ends down on spinning machines
GB1357422A (en) * 1970-07-04 1974-06-19 Howa Machinery Ltd Automatic yarn piecing and knotting method and apparatus for the open-end spinning machine
DE2130740A1 (de) * 1971-06-21 1972-12-28 Skf Kugellagerfabriken Gmbh Verfahren und Vorrichtung zur Vorbereitung des Wiederanspinnens eines Garnes in einer Offen-Ende-Spinnvorrichtung
CS168236B1 (de) * 1973-04-20 1976-05-28
US3855771A (en) 1973-12-05 1974-12-24 Toyoda Automatic Loom Works Device for biasing yarn into fixed position for use with yarn cutting mechanism of automatic doffing apparatus
US4022011A (en) * 1974-02-13 1977-05-10 Hironori Hirai Yarn piecing method for open-end spinning machine
DE2437002A1 (de) * 1974-08-01 1976-02-19 Zinser Textilmaschinen Gmbh Vorrichtung zum anspinnen an offenend-spinnmaschinen
DE2501735A1 (de) * 1975-01-17 1976-07-22 Schlafhorst & Co W Verfahren und vorrichtung zur automatisierung des auflaufspulenwechsels an einer spinnmaschine, insbesondere rotor- spinnmaschine
CH593355A5 (de) 1975-02-14 1977-11-30 Rieter Ag Maschf
DE2507199C2 (de) * 1975-02-20 1986-01-30 W. Schlafhorst & Co, 4050 Mönchengladbach Vorrichtung zum Steuern des Anspinnvorgangs bei Rotor-Spinnmaschinen
US4012116A (en) 1975-05-30 1977-03-15 Personal Communications, Inc. No glasses 3-D viewer
DE2541589A1 (de) 1975-09-18 1977-03-24 Schlafhorst & Co W Vorrichtung zum selbsttaetigen anspinnen
DE2544209A1 (de) * 1975-10-03 1977-04-14 Fritz Stahlecker Verfahren zum anspinnen eines offenend-spinnaggregats
DE2605978C2 (de) 1976-02-14 1986-06-05 W. Schlafhorst & Co, 4050 Mönchengladbach Vorrichtung zum Steuern des Anspinnvorgangs bei Rotor-Spinnmaschinen
DE2610575A1 (de) 1976-03-12 1977-09-22 Schlafhorst & Co W Vorrichtung zum beruehrungslosen ueberwachen rotierender teile
DE2717314A1 (de) * 1977-04-19 1978-11-02 Schubert & Salzer Maschinen Verfahren und vorrichtung zum fadenbruchbeheben und zum ansetzen von faeden an offend-end-spinnvorrichtungen
DE2725105C2 (de) * 1977-06-03 1994-07-07 Fritz 7347 Bad Überkingen Stahlecker Verfahren zum Durchführen eines Anspinnvorganges und Vorrichtung zum Durchführen des Verfahrens
DE2728003C2 (de) * 1977-06-22 1986-12-18 Stahlecker, Fritz, 7347 Bad Überkingen Entlang einer Offenend-Spinnmaschine verfahrbare Anspinneinrichtung
DE2850729C2 (de) * 1978-11-23 1986-03-13 W. Schlafhorst & Co, 4050 Mönchengladbach Verfahren und Vorrichtung zum Anspinnen eines Fadens
EP0071893B1 (de) 1981-08-11 1985-05-15 Maschinenfabrik Rieter Ag Verfahren zum Reinigen von Spinnrotoren und Einrichtung zu dessen Durchführung
GB2140553B (en) 1983-05-24 1988-03-23 Rieter Ag Maschf Automat location system
DE3483534D1 (de) 1983-05-20 1990-12-06 Rieter Ag Maschf Spulenhuelsen-einlegevorrichtung.

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5473879A (en) * 1993-04-24 1995-12-12 W. Schlafhorst Ag & Co. Open-end spinning machine for producing cross-wound bobbins
US5681000A (en) * 1994-09-14 1997-10-28 W. Schlafhorst Ag & Co. Servicing apparatus for a yarn package-producing textile machine
DE4432702B4 (de) * 1994-09-14 2005-08-18 Saurer Gmbh & Co. Kg Serviceeinrichtung für eine Kreuzspulen herstellende Textilmaschine
EP0716169A2 (de) 1994-12-09 1996-06-12 W. SCHLAFHORST AG & CO. Kreuzspulen herstellende Textilmaschine
US5634602A (en) * 1994-12-09 1997-06-03 W. Schlafhorst Ag & Co. Open end spinning machine with associated service device

Also Published As

Publication number Publication date
DE3465116D1 (en) 1987-09-03
EP0127017A1 (de) 1984-12-05
EP0203508A3 (en) 1987-12-16
EP0198516A2 (de) 1986-10-22
EP0197564B1 (de) 1990-07-18
DE3482775D1 (de) 1990-08-23
EP0197564A3 (en) 1987-12-09
EP0198516A3 (en) 1987-12-16
DE3481999D1 (de) 1990-05-23
ES532978A0 (es) 1985-06-01
EP0198516B1 (de) 1990-04-18
EP0197564A2 (de) 1987-12-09
IN161183B (de) 1987-10-17
DE3482776D1 (de) 1990-08-23
ES8505741A1 (es) 1985-06-01
EP0203508A2 (de) 1986-12-03
EP0127017B1 (de) 1987-07-29
KR850000542A (ko) 1985-02-28

Similar Documents

Publication Publication Date Title
US4653261A (en) Open-end yarn piecer
US5022222A (en) Process and device for piecing yarn to an open-end spinning device
US4178749A (en) Method and apparatus for execution of a piecing process
US4083171A (en) Method and apparatus for eliminating an abnormality in a thread to be wound onto the bobbin of an open-end spinning device
US4920739A (en) Method and apparatus for reestablishing the spinning operation
US4845936A (en) Process and device to piece back to a spinning device operating with a pneumatic torsion element
US4891933A (en) Method and apparatus for the rapid reestablishment of operation of a textile spinning machine
US3455095A (en) Spinning of textile yarns
US4716718A (en) Open-end rotor spinning machine
US3640059A (en) Method of spinning-in yarn upon interruption of the spinning process in spindleless spinning machines and device for performing said method
US4545193A (en) Method for piecing fasciated yarn
US4132056A (en) Open end spinning apparatus
US4494371A (en) Method and apparatus for yarn piecing in a ringless spinning machine
EP0203508B1 (de) Wiederanspinnen in Offenend-Spinnmaschinen
US4318269A (en) Process and apparatus for piecing-up a wrap yarn
US4619109A (en) Method and apparatus for yarn piecing in a fasciated yarn spinning unit
US5142856A (en) Yarn piecing method for yarn spinning machine
JP3283578B2 (ja) 操作オートマトンとエアージェット紡績機の紡績ステーションとの間の動作シーケンスの制御方法および制御装置
US5293738A (en) Device for picking up and preparing the skein end for rejoining in an open-end spinning machine
JP2980961B2 (ja) 紡績装置及び紡績動作を再開させるための方法
US4922704A (en) Method and apparatus for introducing a roving into a textile machine drafting frame
US4633660A (en) Process and apparatus for rejoining a thread on an open-end friction-spinning device
GB2192906A (en) Open-end yarn piecer
GB2192904A (en) Open-end yarn piecer
GB2192905A (en) Open-end yarn piecer

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AC Divisional application: reference to earlier application

Ref document number: 127017

Country of ref document: EP

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE FR IT LI NL

17P Request for examination filed

Effective date: 19870527

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE FR IT LI NL

17Q First examination report despatched

Effective date: 19880429

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AC Divisional application: reference to earlier application

Ref document number: 127017

Country of ref document: EP

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR IT LI NL

REF Corresponds to:

Ref document number: 54683

Country of ref document: AT

Date of ref document: 19900815

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3482776

Country of ref document: DE

Date of ref document: 19900823

ITF It: translation for a ep patent filed

Owner name: GUZZI E RAVIZZA S.R.L.

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19910419

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19910425

Year of fee payment: 8

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19910531

Year of fee payment: 8

26 Opposition filed

Opponent name: W. SCHLAFHORST & CO.

Effective date: 19910418

NLR1 Nl: opposition has been filed with the epo

Opponent name: W. SCHLAFHORST & CO.

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19920413

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19920415

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19920505

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19920531

BERE Be: lapsed

Owner name: MASCHINENFABRIK RIETER A.G.

Effective date: 19920531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19921201

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19930413

Year of fee payment: 10

ITTA It: last paid annual fee
RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

27W Patent revoked

Effective date: 19930515

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL