EP0640705A1 - Combing machine - Google Patents

Combing machine Download PDF

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Publication number
EP0640705A1
EP0640705A1 EP94112730A EP94112730A EP0640705A1 EP 0640705 A1 EP0640705 A1 EP 0640705A1 EP 94112730 A EP94112730 A EP 94112730A EP 94112730 A EP94112730 A EP 94112730A EP 0640705 A1 EP0640705 A1 EP 0640705A1
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EP
European Patent Office
Prior art keywords
combing machine
deflection roller
roller
driven
machine according
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.)
Granted
Application number
EP94112730A
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German (de)
French (fr)
Other versions
EP0640705B1 (en
Inventor
Thomas Stolz
Viktor Pietrini
Oliver Wüst
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.)
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Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0640705A1 publication Critical patent/EP0640705A1/en
Application granted granted Critical
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G21/00—Combinations of machines, apparatus, or processes, e.g. for continuous processing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/76—Depositing materials in cans or receptacles
    • B65H54/80—Apparatus in which the depositing device or the receptacle is rotated
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G19/00—Combing machines
    • D01G19/06—Details
    • D01G19/14—Drawing-off and delivery apparatus
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G19/00—Combing machines
    • D01G19/06—Details
    • D01G19/26—Driving arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a combing machine with a drafting system, a rotatable can plate, a rotatable hopper wheel arranged above the can plate, a conveyor belt which is arranged around a first deflection roller which is arranged at the drafting arrangement and can be driven together with it, and around a second deflection roller which is arranged above the hopper wheel is placed, and with a pair of calender rollers arranged above the hopper wheel.
  • the drive devices for the can plate and the hopper wheel which can be rotated about vertical axes, and for the calender rolls which can be rotated about horizontal axes, are very complicated and therefore expensive.
  • the drive devices contain several intermediate shafts which are connected to one another via gear elements with a plurality of changes in direction.
  • the aim of the invention is to simplify the drive of the calender rolls in a comber of the type specified.
  • the combing machine according to the invention is characterized in that one of the calender rolls is coupled to the second deflecting roller and can be driven by the latter.
  • the combing machine shown contains a number of combing heads, only the last combing head 1 of which is partially indicated in FIG. 1.
  • the combing heads deliver combed slivers B to an outlet table 2, on which the belts B run to the left to a drafting device 3 which contains five lower rollers 3.1, 3.2, 3.3, 3.4 and 3.5, with which three pressure rollers cooperate.
  • the four first lower rollers 3.1, 3.2, 3.3 and 3.4 are driven by a shaft 4 via gear means, not shown.
  • the shaft 4 is in turn driven by a drive shaft 5, which also drives a third shaft 6.
  • the shaft 6 then drives, again via gear means, not shown, the fifth lower roller 3.5 of the drafting system 3 and also a deflection roller 7 for a conveyor belt 8.
  • the conveyor belt 8 runs from the deflection roller 7 under a pressure roller 9 and via a guide roller 10 (FIG. 2) to a second deflection roller 11 and from there via a further guide roller 12 back to the first deflection roller 7.
  • the guide roller 12 also serves as a tensioning roller for Maintaining a predetermined tension in the conveyor belt 8.
  • the fleece delivered by the drafting system 3 is deformed into a belt in a guide 13 and guided onto the conveyor belt 8 running around the deflection roller 7.
  • the conveyor belt 8 is pressed against the pressure roller 9 by its tension.
  • the sliver F from the guide 13 is therefore gripped between the pressure roller 9 and the conveyor belt 8 and then transported on the conveyor belt 8 to the second deflection roller 11.
  • the pressure roller 9 does not have its own drive, but is carried along by the running conveyor belt 8 or by the sliver F lying thereon.
  • a pair of calender rolls 14, 15 is arranged under the second deflection roller 11.
  • the axes of the calender rollers 14 and 15 run parallel to the axis of the deflecting roller 11.
  • the calender rolls 14, 15 capture the sliver F brought up on the conveyor belt 8 and deliver it into a funnel wheel 19 arranged under the calender rolls and rotating about a vertical axis.
  • the funnel wheel 19 places the sliver in a can 20, which stands on a can plate 21, which is also rotated about a vertical axis.
  • the second deflection roller 11 preferably has a relatively large diameter of, for example, approximately 100 mm. On the one hand, this keeps the centrifugal force within limits, which acts on the sliver when it runs on the conveyor belt 8 around the deflection roller 11. On the other hand, the slippage between the conveyor belt 8 and the deflection roller 11 driven thereby is kept within limits.
  • the gear wheels 16 and 18 and the toothed belt 17 are arranged in the housing of the combing machine in an enclosed chamber (30). An overpressure is maintained in this chamber, with which the ingress of fiber fly and dust into the chamber is prevented.
  • the means for generating the excess pressure include a fan 31 which draws air from the environment through a sieve 32 and presses it into the chamber.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

The combing machine contains a can plate (21) and, above this, a coiler (19). A fibre sliver (F) coming from a drawframe of the combing machine is brought forward on a conveyor band (8). The conveyor band (8) runs around a first deflecting roller, which is arranged at the drawframe and which is driven jointly with this, and around a second deflecting roller (11) which is arranged above the coiler (19). Furthermore, a pair of calender rollers (14, 15) is arranged above the coiler (19). The second deflecting roller (11), which is driven by the running conveyor band (8), is coupled to one of the calender rollers (14) via a toothed belt (17). There is therefore no need for any separate drive connections to the calender rollers (14, 15). <IMAGE>

Description

Die Erfindung bezieht sich auf eine Kämmaschine mit einem Streckwerk, einem drehbaren Kannenteller, einem über dem Kannenteller angeordneten drehbaren Trichterrad, einem Transportband, welches um eine erste, beim Streckwerk angeordnete, gemeinsam mit diesem antreibbare Umlenkrolle und um eine zweite, über dem Trichterrad angeordnete Umlenkrolle gelegt ist, und mit einem über dem Trichterrad angeordneten Kalanderwalzenpaar.The invention relates to a combing machine with a drafting system, a rotatable can plate, a rotatable hopper wheel arranged above the can plate, a conveyor belt which is arranged around a first deflection roller which is arranged at the drafting arrangement and can be driven together with it, and around a second deflection roller which is arranged above the hopper wheel is placed, and with a pair of calender rollers arranged above the hopper wheel.

In bekannten Kämmaschinen dieser Art sind die Antriebseinrichtungen für den Kannenteller und das Trichterrad, die um vertikale Achsen drehbar sind, und für die um horizontale Achsen drehbaren Kalanderwalzen sehr kompliziert und dadurch kostspielig. Die Antriebseinrichtungen enthalten, von einer Streckwerks-Antriebswelle ausgehend, mehrere Zwischenwellen, die über Getriebeelemente mit mehreren Richtungsänderungen miteinander verbunden sind.In known combing machines of this type, the drive devices for the can plate and the hopper wheel, which can be rotated about vertical axes, and for the calender rolls which can be rotated about horizontal axes, are very complicated and therefore expensive. Starting from a drafting system drive shaft, the drive devices contain several intermediate shafts which are connected to one another via gear elements with a plurality of changes in direction.

Das Ziel der Erfindung besteht in einer Vereinfachung des Antriebes der Kalanderwalzen in einer Kämmaschine der eingangs angegebenen Art.The aim of the invention is to simplify the drive of the calender rolls in a comber of the type specified.

Die erfindungsgemässe Kämmaschine, mit der dieses Ziel erreicht wird, ist dadurch gekennzeichnet, dass eine der Kalanderwalzen mit der zweiten Umlenkrolle gekuppelt und von dieser antreibbar ist.The combing machine according to the invention, with which this goal is achieved, is characterized in that one of the calender rolls is coupled to the second deflecting roller and can be driven by the latter.

In dieser Weise ist für den Antrieb des Kalanderwalzenpaares lediglich eine Kupplung, z.B.über einen Zahnriemen, zwischen der vom Transportband angetriebenen zweiten Umlenkrolle und der einen Kalanderwalze erforderlich.In this way, all that is required to drive the pair of calender rolls is a coupling, for example via a toothed belt, between the second deflection roller driven by the conveyor belt and the one calender roll.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnungen erläutert. In diesen zeigen:

  • Fig. 1 einen Ausschnitt aus einer schematischen Vorderansicht einer erfindungsgemässen Kämmaschine und
  • Fig. 2 einen anderen Ausschnitt, der links an den in Fig. 1 gezeigten Ausschnitt anschliesst.
An embodiment of the invention is explained below with reference to the drawings. In these show:
  • Fig. 1 shows a section of a schematic front view of a combing machine according to the invention and
  • Fig. 2 shows another section, which adjoins the section shown in Fig. 1 on the left.

Die dargestellte Kämmaschine enthält eine Reihe von Kämmköpfen, von denen lediglich der letzte Kämmkopf 1 in Fig. 1 teilweise angedeutet ist. Die Kämmköpfe geben gekämmte Faserbänder B auf einen Auslauftisch 2 ab, auf dem die Bänder B nach links zu einem Streckwerk 3 laufen, welches fünf Unterwalzen 3.1, 3.2, 3.3, 3.4 und 3.5 enthält, mit denen drei Druckwalzen zusammenwirken. Die vier ersten Unterwalzen 3.1, 3.2, 3.3 und 3.4 werden von einer Welle 4 aus über nicht dargestellte Getriebemittel angetrieben. Die Welle 4 wird ihrerseits von einer Antriebswelle 5 angetrieben, die auch eine dritte Welle 6 treibt. Die Welle 6 treibt dann, wiederum über nicht dargestellte Getriebemittel, die fünfte Unterwalze 3.5 des Streckwerks 3 und ferner eine Umlenkrolle 7 für ein Transportband 8.The combing machine shown contains a number of combing heads, only the last combing head 1 of which is partially indicated in FIG. 1. The combing heads deliver combed slivers B to an outlet table 2, on which the belts B run to the left to a drafting device 3 which contains five lower rollers 3.1, 3.2, 3.3, 3.4 and 3.5, with which three pressure rollers cooperate. The four first lower rollers 3.1, 3.2, 3.3 and 3.4 are driven by a shaft 4 via gear means, not shown. The shaft 4 is in turn driven by a drive shaft 5, which also drives a third shaft 6. The shaft 6 then drives, again via gear means, not shown, the fifth lower roller 3.5 of the drafting system 3 and also a deflection roller 7 for a conveyor belt 8.

Das Transportband 8 läuft von der Umlenkrolle 7 unter einer Druckrolle 9 hindurch und über eine Führungsrolle 10 (Fig. 2) zu einer zweiten Umlenkrolle 11 und von da über eine weitere Führungsrolle 12 zurück zur ersten Umlenkrolle 7. Die Führungsrolle 12 dient auch als Spannrolle zum Aufrechterhalten einer vorbestimmten Zugspannung im Transportband 8.The conveyor belt 8 runs from the deflection roller 7 under a pressure roller 9 and via a guide roller 10 (FIG. 2) to a second deflection roller 11 and from there via a further guide roller 12 back to the first deflection roller 7. The guide roller 12 also serves as a tensioning roller for Maintaining a predetermined tension in the conveyor belt 8.

Das vom Streckwerk 3 abgegebene Vlies wird in einer Führung 13 zu einem Band verformt und auf das um die Umlenkrolle 7 laufende Transportband 8 geführt. Das Transportband 8 ist durch seine Spannung gegen die Druckrolle 9 gedrückt. Das Faserband F aus der Führung 13 wird daher zwischen der Druckrolle 9 und dem Transportband 8 erfasst und dann auf dem Transportband 8 zur zweiten Umlenkrolle 11 transportiert. Die Druckrolle 9 hat keinen eigenen Antrieb, sondern wird vom laufenden Transportband 8 bzw. vom darauf liegenden Faserband F mitgenommen.The fleece delivered by the drafting system 3 is deformed into a belt in a guide 13 and guided onto the conveyor belt 8 running around the deflection roller 7. The conveyor belt 8 is pressed against the pressure roller 9 by its tension. The sliver F from the guide 13 is therefore gripped between the pressure roller 9 and the conveyor belt 8 and then transported on the conveyor belt 8 to the second deflection roller 11. The pressure roller 9 does not have its own drive, but is carried along by the running conveyor belt 8 or by the sliver F lying thereon.

Unter der zweiten Umlenkrolle 11 ist ein Kalanderwalzenpaar 14, 15 angeordnet. Die Achsen der Kalanderwalzen 14 und 15 verlaufen parallel zur Achse der Umlenkrolle 11. Die Umlenkrolle 11, die vom laufenden Transportband 8 angetrieben wird, treibt die eine Kalanderwalze 14 über ein auf der Umlenkrolle 11 sitzendes Zahnrad 16, einen Zahnriemen 17 und ein von der Kalanderwalze 14 getragenes Zahnrad 18.A pair of calender rolls 14, 15 is arranged under the second deflection roller 11. The axes of the calender rollers 14 and 15 run parallel to the axis of the deflecting roller 11. The deflecting roller 11, which is driven by the running conveyor belt 8, drives the one calender roller 14 via a gearwheel 16 seated on the deflecting roller 11, a toothed belt 17 and a toothed wheel 18 carried by the calender roller 14.

Die Kalanderwalzen 14, 15 erfassen das auf dem Transportband 8 herangeführte Faserband F und geben es in ein unter den Kalanderwalzen angeordnetes, um eine vertikale Achse drehendes Trichterrad 19 ab. Das Trichterrad 19 legt das Faserband in eine Kanne 20 ab, die auf einem Kannenteller 21 steht, welcher ebenfalls um eine vertikale Achse gedreht wird.The calender rolls 14, 15 capture the sliver F brought up on the conveyor belt 8 and deliver it into a funnel wheel 19 arranged under the calender rolls and rotating about a vertical axis. The funnel wheel 19 places the sliver in a can 20, which stands on a can plate 21, which is also rotated about a vertical axis.

Die zweite Umlenkrolle 11 hat vorzugsweise einen relativ grossen Durchmesser von beispielsweise etwa 100 mm. Dadurch wird einerseits die Zentrifugalkraft in Grenzen gehalten, die auf das Faserband wirkt, wenn dieses auf dem Transportband 8 um die Umlenkrolle 11 läuft. Anderseits wird auch der Schlupf zwischen dem Transportband 8 und der von diesem getriebenen Umlenkrolle 11 in Grenzen gehalten.The second deflection roller 11 preferably has a relatively large diameter of, for example, approximately 100 mm. On the one hand, this keeps the centrifugal force within limits, which acts on the sliver when it runs on the conveyor belt 8 around the deflection roller 11. On the other hand, the slippage between the conveyor belt 8 and the deflection roller 11 driven thereby is kept within limits.

Die Zahnräder 16 und 18 und der Zahnriemen 17 sind im Gehäuse der Kämmaschine in einer umschlossenen Kammer (30 ) angeordnet. In dieser Kammer wird ein Ueberdruck aufrechterhalten, mit welchem das Eindringen von Faserflug und Staub in die Kammer verhindert wird. Die Mittel zum Erzeugen des Ueberdrucks enthalten einen Ventilator 31, der Luft aus der Umgebung durch ein Sieb 32 hindurch ansaugt und in die Kammer drückt.The gear wheels 16 and 18 and the toothed belt 17 are arranged in the housing of the combing machine in an enclosed chamber (30). An overpressure is maintained in this chamber, with which the ingress of fiber fly and dust into the chamber is prevented. The means for generating the excess pressure include a fan 31 which draws air from the environment through a sieve 32 and presses it into the chamber.

Claims (6)

Kämmaschine, mit einem Streckwerk (3), einem drehbaren Kannenteller (21), einem über dem Kannenteller angeordneten drehbaren Trichterrad (19), einem Transportband (8), welches um eine erste, beim Streckwerk (3) angeordnete, gemeinsam mit diesem antreibbare Umlenkrolle (7) und um eine zweite, über dem Trichterrad (19) angeordnete Umlenkrolle (11) gelegt ist, und mit einem über dem Trichterrad (19) angeordneten Kalanderwalzenpaar (14, 15), dadurch gekennzeichnet, dass eine der Kalanderwalzen (14) mit der zweiten Umlenkrolle (11) gekuppelt und von dieser antreibbar ist.Combing machine, with a drafting system (3), a rotatable can plate (21), a rotatable hopper wheel (19) arranged above the can plate, a conveyor belt (8) which is arranged around a first deflection roller which can be driven together with the drawing frame (3) (7) and around a second deflection roller (11) arranged above the funnel wheel (19), and with a pair of calender rolls (14, 15) arranged above the funnel wheel (19), characterized in that one of the calender rolls (14) also has the second deflection roller (11) is coupled and can be driven by it. Kämmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die eine der Kalanderwalzen (14) mit der zweiten Umlenkrolle (11) über einen Zahnriemen (17) gekuppelt ist.Combing machine according to claim 1, characterized in that one of the calender rollers (14) is coupled to the second deflection roller (11) via a toothed belt (17). Kämmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Zahnriemen (17) in einer umschlossenen Kammer angeordnet ist und dass Mittel vorgesehen sind zum Aufrechterhalten eines Ueberdrucks in dieser Kammer.Combing machine according to claim 1 or 2, characterized in that the toothed belt (17) is arranged in an enclosed chamber and that means are provided for maintaining an overpressure in this chamber. Kämmaschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Achse der Kalanderwalze (14) etwa parallel zur Achse der zweiten Umlenkrolle (11) verläuft.Combing machine according to one of claims 1 to 3, characterized in that the axis of the calender roller (14) runs approximately parallel to the axis of the second deflection roller (11). Kämmaschine nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die zweite Umlenkrolle (11) einen Durchmesser von mehr als 50 mm hat, vorzugsweise einen Durchmesser von etwa 100 mm.Combing machine according to one of claims 1 to 4, characterized in that the second deflection roller (11) has a diameter of more than 50 mm, preferably a diameter of about 100 mm. Kämmaschine nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass benachbart zur ersten Umlenkrolle (7) eine Druckrolle (9) angeordnet ist, die vom Transportband (8) antreibbar ist.Combing machine according to one of claims 1 to 5, characterized in that a pressure roller (9) is arranged adjacent to the first deflection roller (7) and can be driven by the conveyor belt (8).
EP94112730A 1993-08-25 1994-08-16 Combing machine Expired - Lifetime EP0640705B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2523/93 1993-08-25
CH252393 1993-08-25

Publications (2)

Publication Number Publication Date
EP0640705A1 true EP0640705A1 (en) 1995-03-01
EP0640705B1 EP0640705B1 (en) 1996-10-02

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EP94112730A Expired - Lifetime EP0640705B1 (en) 1993-08-25 1994-08-16 Combing machine

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EP (1) EP0640705B1 (en)
CN (1) CN1048046C (en)
DE (1) DE59400766D1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012071675A1 (en) 2010-11-30 2012-06-07 Maschinenfabrik Rieter Ag Combing machine
CN105369401A (en) * 2015-12-24 2016-03-02 江苏凯宫机械股份有限公司 Cotton web bundling mechanism of intelligent comber

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20011569A1 (en) * 2001-07-23 2003-01-23 Marzoli Spa CARDA TAPE COLLECTION GROUP FOR ITS PACKAGING IN VARIOUS SIZE JARS

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1305461A (en) * 1961-07-21 1962-10-05 Schlumberger Cie N Improvement in the output devices of rectilinear combers and similar textile machines
EP0314310A2 (en) * 1987-10-09 1989-05-03 John D. Hollingsworth On Wheels Inc. Compact carding apparatus with sliver thread-up and method
DE8519934U1 (en) * 1985-07-10 1989-11-30 Truetzschler Gmbh & Co Kg, 4050 Moenchengladbach, De
DE4115820A1 (en) * 1991-05-15 1992-11-19 Rieter Ag Maschf Sliver coiler - has corrugated belts to hold the sliver during passage through the machine, so that it does not extend and break
WO1993012278A1 (en) * 1991-12-09 1993-06-24 Maschinenfabrik Rieter Ag Combing machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1305461A (en) * 1961-07-21 1962-10-05 Schlumberger Cie N Improvement in the output devices of rectilinear combers and similar textile machines
DE8519934U1 (en) * 1985-07-10 1989-11-30 Truetzschler Gmbh & Co Kg, 4050 Moenchengladbach, De
EP0314310A2 (en) * 1987-10-09 1989-05-03 John D. Hollingsworth On Wheels Inc. Compact carding apparatus with sliver thread-up and method
DE4115820A1 (en) * 1991-05-15 1992-11-19 Rieter Ag Maschf Sliver coiler - has corrugated belts to hold the sliver during passage through the machine, so that it does not extend and break
WO1993012278A1 (en) * 1991-12-09 1993-06-24 Maschinenfabrik Rieter Ag Combing machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012071675A1 (en) 2010-11-30 2012-06-07 Maschinenfabrik Rieter Ag Combing machine
JP2014501856A (en) * 2010-11-30 2014-01-23 マシーネンファブリク リーター アクチェンゲゼルシャフト Combing machine
CN105369401A (en) * 2015-12-24 2016-03-02 江苏凯宫机械股份有限公司 Cotton web bundling mechanism of intelligent comber
CN105369401B (en) * 2015-12-24 2018-04-13 江苏凯宫机械股份有限公司 The cotton net bunching mechansim of intelligent combing machine

Also Published As

Publication number Publication date
CN1048046C (en) 2000-01-05
EP0640705B1 (en) 1996-10-02
DE59400766D1 (en) 1996-11-07
CN1106083A (en) 1995-08-02

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