EP0640704B1 - Combing machine - Google Patents

Combing machine Download PDF

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Publication number
EP0640704B1
EP0640704B1 EP94112681A EP94112681A EP0640704B1 EP 0640704 B1 EP0640704 B1 EP 0640704B1 EP 94112681 A EP94112681 A EP 94112681A EP 94112681 A EP94112681 A EP 94112681A EP 0640704 B1 EP0640704 B1 EP 0640704B1
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EP
European Patent Office
Prior art keywords
drive shaft
combing machine
shaft
combing
belt
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.)
Expired - Lifetime
Application number
EP94112681A
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German (de)
French (fr)
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EP0640704A1 (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
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Maschinenfabrik Rieter AG
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Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
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    • 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
    • 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

Definitions

  • the invention relates to a combing machine with a row of combing heads, which is assigned a drive shaft running parallel to the longitudinal direction of the row, with a drafting device, the rollers of which are arranged approximately horizontally and at right angles to the longitudinal direction of the row of combing heads, and with a can plate and one Funnel wheel, which can be rotated around vertical axes.
  • the object of the invention is to facilitate and reduce the cost of the drive devices for the rollers of the drafting system, the can plate and the hopper wheel in a combing machine of the type specified at the outset.
  • the combing machine according to the invention is characterized in that a first angular drive with a first set toothed belt is arranged between the drive shaft mentioned and a drafting drive shaft parallel to the rollers of the drafting system and that between a parallel to the drafting drive shaft Shaft and a vertical drive shaft for the can plate and the funnel wheel, a second angular drive with a second set toothed belt is arranged.
  • the rollers of the drafting system are preferably driven by the drafting system drive shaft via further toothed belts.
  • Power transmission using toothed belts has the additional advantage that it has less play than power transmission using gearwheels, bevel gears, etc.
  • the single figure shows a schematic perspective exploded view of drive devices in a combing machine, the housing of the machine being indicated by broken lines.
  • the combing machine has a number of combing heads, of which only the outlines of the last combing head 1 of the series are indicated.
  • Working parts of the combing heads are driven by a motor, not shown, via transmission devices, not shown, which also drive a drive shaft 2 running parallel to the longitudinal direction of the row of combing heads.
  • the strips of combed fiber material released by the combing heads 1 are fed together to a drafting system, of which only five lower rollers 3, 4, 5, 6 and 7 are shown. Three printing rollers, not shown, work together with these rollers.
  • the rollers of the drafting system 3, 4, 5, 6, 7 are arranged horizontally and at right angles to the longitudinal direction of the row of combing heads 1.
  • the fleece emitted by the drafting device 3, 4, 5, 6, 7 is transported in belt form on a conveyor belt 8 to a funnel wheel 9 which can be rotated about a vertical axis.
  • the funnel wheel 9 places the sliver into a can (not shown) which, in operation, stands on a can plate 10, which can also be rotated about a vertical axis.
  • a gearwheel 11 which is coupled via a first angular drive with a first set toothed belt 12, which is placed around two deflection rollers, with a gearwheel 13 which is connected to the drafting rollers 3, 4, 5, 6, 7 parallel drafting drive shaft 14 sits.
  • the shaft 14 drives, via a further toothed belt 15, a second shaft 16 which is parallel to the drafting rollers 3, 4, 5, 6, 7 and which additionally carries two toothed wheels 17 and 18.
  • the toothed wheel 17 drives a shaft 20 via a toothed belt 19, on which two toothed wheels 21 and 22 are seated.
  • the toothed wheel 21 drives two toothed wheels via a toothed belt 23, which sit on the two first drafting rolls 3 and 4, and the toothed wheel 22 drives two toothed wheels via a toothed belt 24, which sit on the third and fourth drafting rolls 5 and 6, respectively.
  • the gear 18 on the shaft 16 drives a further shaft 26 parallel to the drafting drive shaft 14 via a toothed belt 25.
  • a gear 27 On the shaft 26 is a gear 27, which drives two further gears via a toothed belt 28, one of which sits on the fifth drafting roller 7 and the other sits on the shaft of a drive roller 29 for the conveyor belt 8.
  • a gearwheel 30 is seated on the shaft 26, which drives a gearwheel 32 which is fastened on a vertical shaft 33 via a second angular drive with a second set toothed belt 31.
  • the toothed belt 31 also runs around two freely rotatable deflection rollers, one of which is mounted on the shaft 26 and the other is arranged parallel to the toothed wheel 32.
  • the vertical shaft 33 serves as a drive shaft for the can plate 10 and for the funnel wheel 9. With the can plate 10, the shaft 33 is coupled via a standard reduction gear 34 and a chain 35. With the funnel wheel 9, the shaft 33 is coupled via a V-belt 36.
  • the V-belt 36 runs around a pulley 37 seated on the shaft 33, which is designed as a variator pulley. By adjusting the variator disk 37, the speed of the funnel wheel 9 can be changed by, for example, ⁇ 5%.
  • the two set toothed belts 12 and 31 and the front toothed belts 24 and 25 and preferably the V-belts 36 are also arranged in the housing of the combing machine in a respective enclosed chamber 45 and 46, shown schematically.
  • An overpressure is maintained in these chambers, with which the ingress of fiber fly and dust into the chamber is prevented.
  • the means for generating the excess pressure each contain a fan 47 or 49, which draws in air from the environment through a sieve 48 or 50 and presses it into the chamber.
  • An extension or a further chamber (not shown) which receives the rear toothed belts 15, 19, 23 and 28 can be connected to the chamber.

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

Description

Die Erfindung bezieht sich auf eine Kämmaschine mit einer Reihe von Kämmköpfen, denen eine parallel zur Längsrichtung der Reihe verlaufende Antriebswelle zugeordnet ist, mit einem Streckwerk, dessen Walzen etwa horizontal und rechtwinklig zur Längsrichtung der Reihe von Kämmköpfen angeordnet sind, und mit einem Kannenteller und einem Trichterrad, welche um vertikale Achsen drehbar sind.The invention relates to a combing machine with a row of combing heads, which is assigned a drive shaft running parallel to the longitudinal direction of the row, with a drafting device, the rollers of which are arranged approximately horizontally and at right angles to the longitudinal direction of the row of combing heads, and with a can plate and one Funnel wheel, which can be rotated around vertical axes.

Es ist in solchen Kämmaschinen üblich, die Walzen des Streckwerks und auch den Kannenteller und das Trichterrad von der parallel zur Längsrichtung der Reihe von Kämmköpfen verlaufenden Antriebswelle aus anzutreiben (vgl. W. Klein, Handbuch der textilen Fertigung, Bd. 3- Die Kurzstapelspinnerei, Fürth, Seite 34, getriebeskizze E7/5). Dazu werden Antriebseinrichtungen mit mehreren Richtungsänderungen um jeweils 90° verwendet, z.B. mit Kegelrädern und zum Teil auch mit Schnecken und Schneckenrädern. Diese Antriebseinrichtungen in bekannten Kämmaschinen sind kompliziert und teuer.It is customary in such combing machines to drive the rollers of the drafting system and also the can plate and the hopper wheel from the drive shaft running parallel to the longitudinal direction of the row of combing heads (cf. W. Klein, Handbuch der textileabrication, Vol. 3- Die Kurzstapelspinnerei, Fürth, page 34, gear sketch E7 / 5). For this purpose, drive devices with several changes of direction by 90 ° are used, e.g. with bevel gears and sometimes also with worms and worm gears. These drive devices in known combing machines are complicated and expensive.

Die Aufgabe der Erfindung besteht darin, in einer Kämmaschine der eingangs angegebenen Art eine Vereinfachung und Verbilligung der Antriebseinrichtungen für die Walzen des Streckwerks, den Kannenteller und das Trichterrad zu ermöglichen.The object of the invention is to facilitate and reduce the cost of the drive devices for the rollers of the drafting system, the can plate and the hopper wheel in a combing machine of the type specified at the outset.

Die erfindungsgemässe Kämmaschine, mit der die Aufgabe gelöst wird, ist dadurch gekennzeichnet, dass zwischen der genannten Antriebswelle und einer zu den Walzen des Streckwerks parallelen Streckwerk-Antriebswelle ein erster Winkeltrieb mit einem ersten geschränkten Zahnriemen angeordnet ist und dass zwischen einer zur Streckwerk-Antriebswelle parallelen Welle und einer vertikalen Antriebswelle für den Kannenteller und das Trichterrrad ein zweiter Winkeltrieb mit einem zweiten geschränkten Zahnriemen angeordnet ist.The combing machine according to the invention, with which the object is achieved, is characterized in that a first angular drive with a first set toothed belt is arranged between the drive shaft mentioned and a drafting drive shaft parallel to the rollers of the drafting system and that between a parallel to the drafting drive shaft Shaft and a vertical drive shaft for the can plate and the funnel wheel, a second angular drive with a second set toothed belt is arranged.

Vorzugsweise sind die Walzen des Streckwerks von der Streckwerk-Antriebswelle über weitere Zahnriemen angetrieben.The rollers of the drafting system are preferably driven by the drafting system drive shaft via further toothed belts.

Die Kraftübertragung mittels Zahnriemen hat den zusätzlichen Vorteil, dass sie mit weniger Spiel behaftet ist als Kraftübertragungen mittels Zahnrädern, Kegelrädern usw.Power transmission using toothed belts has the additional advantage that it has less play than power transmission using gearwheels, bevel gears, etc.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung näher erläutert.An embodiment of the invention is explained below with reference to the drawing.

Die einzige Figur zeigt in einer schematischen perspektivischen Explosionsdarstellung Antriebseinrichtungen in einer Kämmaschine, wobei das Gehäuse der Maschine mit unterbrochenen Linien angedeutet ist.The single figure shows a schematic perspective exploded view of drive devices in a combing machine, the housing of the machine being indicated by broken lines.

Die Kämmaschine besitzt eine Reihe von Kämmköpfen, von denen nur die Umrisse des letzten Kämmkopfes 1 der Reihe angedeutet sind. Arbeitende Teile der Kämmköpfe werden von einem nicht dargestellten Motor über nicht dargestellte Getriebeeinrichtungen angetrieben, welche auch eine parallel zur Längsrichtung der Reihe von Kämmköpfen verlaufende Antriebswelle 2 antreiben.The combing machine has a number of combing heads, of which only the outlines of the last combing head 1 of the series are indicated. Working parts of the combing heads are driven by a motor, not shown, via transmission devices, not shown, which also drive a drive shaft 2 running parallel to the longitudinal direction of the row of combing heads.

Die von den Kämmköpfen 1 abgegebenen Bänder aus gekämmtem Fasermaterial werden gemeinsam einem Streckwerk zugeführt, von welchem lediglich fünf Unterwalzen 3, 4, 5, 6 und 7 dargestellt sind. Mit diesen Walzen arbeiten drei nicht dargestellte Druckwalzen zusammen. Die Walzen des Streckwerks 3, 4, 5, 6, 7 sind horizontal und rechtwinklig zur Längsrichtung der Reihe von Kämmköpfen 1 verlaufend angeordnet.The strips of combed fiber material released by the combing heads 1 are fed together to a drafting system, of which only five lower rollers 3, 4, 5, 6 and 7 are shown. Three printing rollers, not shown, work together with these rollers. The rollers of the drafting system 3, 4, 5, 6, 7 are arranged horizontally and at right angles to the longitudinal direction of the row of combing heads 1.

Das vom Streckwerk 3, 4, 5, 6, 7 abgegebene Vlies wird in Bandform auf einem Transportband 8 zu einem Trichterrrad 9 transportiert, das um eine vertikale Achse drehbar ist. Das Trichterrad 9 legt das Faserband in eine Kanne (nicht dargestellt) ab, die im Betrieb auf einem Kannenteller 10 steht, welcher ebenfalls um eine vertikale Achse drehbar ist.The fleece emitted by the drafting device 3, 4, 5, 6, 7 is transported in belt form on a conveyor belt 8 to a funnel wheel 9 which can be rotated about a vertical axis. The funnel wheel 9 places the sliver into a can (not shown) which, in operation, stands on a can plate 10, which can also be rotated about a vertical axis.

Auf der den Kämmköpfen 1 zugeordneten Antriebswelle 2 sitzt ein Zahnrad 11, das über einen ersten Winkeltrieb mit einem ersten, um zwei Umlenkrollen gelegten geschränkten Zahnriemen 12 mit einem Zahnrad 13 gekuppelt ist, welches auf einer zu den Streckwerkwalzen 3, 4, 5, 6, 7 parallelen Streckwerk-Antriebswelle 14 sitzt. Die Welle 14 treibt über einen weiteren Zahnriemen 15 eine zweite zu den Streckwerkwalzen 3, 4, 5, 6, 7 parallele Welle 16, welche zusätzlich zwei Zahnräder 17 und 18 trägt.On the drive shaft 2 assigned to the combing heads 1 sits a gearwheel 11 which is coupled via a first angular drive with a first set toothed belt 12, which is placed around two deflection rollers, with a gearwheel 13 which is connected to the drafting rollers 3, 4, 5, 6, 7 parallel drafting drive shaft 14 sits. The shaft 14 drives, via a further toothed belt 15, a second shaft 16 which is parallel to the drafting rollers 3, 4, 5, 6, 7 and which additionally carries two toothed wheels 17 and 18.

Das Zahnrad 17 treibt über einen Zahnriemen 19 eine Welle 20, auf der zwei Zahnräder 21 und 22 sitzen. Das Zahnrad 21 treibt über einen Zahnriemen 23 zwei Zahnräder, die auf den beiden ersten Streckwerkwalzen 3 und 4 sitzen, und das Zahnrad 22 treibt über einen Zahnriemen 24 zwei Zahnräder, die auf der dritten und der vierten Streckwerkwalze 5 bzw. 6 sitzen.The toothed wheel 17 drives a shaft 20 via a toothed belt 19, on which two toothed wheels 21 and 22 are seated. The toothed wheel 21 drives two toothed wheels via a toothed belt 23, which sit on the two first drafting rolls 3 and 4, and the toothed wheel 22 drives two toothed wheels via a toothed belt 24, which sit on the third and fourth drafting rolls 5 and 6, respectively.

Das Zahnrad 18 auf der Welle 16 treibt über einen Zahnriemen 25 eine weitere zur Streckwerk-Antriebswelle 14 parallele Welle 26.The gear 18 on the shaft 16 drives a further shaft 26 parallel to the drafting drive shaft 14 via a toothed belt 25.

Auf der Welle 26 sitzt ein Zahnrad 27, welches über einen Zahnriemen 28 zwei weitere Zahnräder treibt, von denen eines auf der fünften Streckwerkwalze 7 sitzt und das andere auf der Welle einer Antriebsrolle 29 für das Transportband 8 sitzt.On the shaft 26 is a gear 27, which drives two further gears via a toothed belt 28, one of which sits on the fifth drafting roller 7 and the other sits on the shaft of a drive roller 29 for the conveyor belt 8.

Ferner sitzt auf der Welle 26 ein Zahnrad 30, das über einen zweiten Winkeltrieb mit einem zweiten geschränkten Zahnriemen 31 ein Zahnrad 32 treibt, welches auf einer vertikalen Welle 33 befestigt ist. Der Zahnriemen 31 läuft auch um zwei frei drehbare Umlenkrollen, von denen die eine auf der Welle 26 gelagert ist und die andere parallel zum Zahnrad 32 angeordnet ist. Die vertikale Welle 33 dient als Antriebswelle für den Kannenteller 10 und für das Trichterrad 9. Mit dem Kannenteller 10 ist die Welle 33 über ein handelsübliches Untersetzungsgetriebe 34 und eine Kette 35 gekuppelt. Mit dem Trichterrad 9 ist die Welle 33 über einen Keilriemen 36 gekuppelt. Der Keilriemen 36 läuft um eine auf der Welle 33 sitzende Riemenscheibe 37, die als Variatorscheibe ausgebildet ist. Durch Verstellen der Variatorscheibe 37 kann die Drehzahl des Trichterrades 9 um beispielsweise ± 5% geändert werden.Furthermore, a gearwheel 30 is seated on the shaft 26, which drives a gearwheel 32 which is fastened on a vertical shaft 33 via a second angular drive with a second set toothed belt 31. The toothed belt 31 also runs around two freely rotatable deflection rollers, one of which is mounted on the shaft 26 and the other is arranged parallel to the toothed wheel 32. The vertical shaft 33 serves as a drive shaft for the can plate 10 and for the funnel wheel 9. With the can plate 10, the shaft 33 is coupled via a standard reduction gear 34 and a chain 35. With the funnel wheel 9, the shaft 33 is coupled via a V-belt 36. The V-belt 36 runs around a pulley 37 seated on the shaft 33, which is designed as a variator pulley. By adjusting the variator disk 37, the speed of the funnel wheel 9 can be changed by, for example, ± 5%.

Die beiden geschränkten Zahnriemen 12 und 31 sowie die vorderen Zahnriemen 24 und 25 und vorzugsweise auch der Keilriemen 36 sind im Gehäuse der Kämmaschine in jeweils einer umschlossenen schematisch dargestellten Kammer 45 bzw. 46 angeordnet. In diesen Kammern wird ein Ueberdruck aufrechterhalten, mit welchem das Eindringen von Faserflug und Staub in die Kammer verhindert wird. Die Mittel zum Erzeugen des Ueberdrucks enthalten jeweils einen Ventilator 47 bzw. 49, der Luft aus der Umgebung durch ein Sieb 48 bzw. 50 hindurch ansaugt und in die Kammer drückt. Mit der Kammer kann eine Erweiterung oder eine weitere Kammer (nicht gezeigt) in Verbindung stehen, welche die hinteren Zahnriemen 15, 19, 23 und 28 aufnimmt.The two set toothed belts 12 and 31 and the front toothed belts 24 and 25 and preferably the V-belts 36 are also arranged in the housing of the combing machine in a respective enclosed chamber 45 and 46, shown schematically. An overpressure is maintained in these chambers, with which the ingress of fiber fly and dust into the chamber is prevented. The means for generating the excess pressure each contain a fan 47 or 49, which draws in air from the environment through a sieve 48 or 50 and presses it into the chamber. An extension or a further chamber (not shown) which receives the rear toothed belts 15, 19, 23 and 28 can be connected to the chamber.

Claims (7)

  1. A combing machine, with a row of combing heads (1) to which is associated a drive shaft (2) extending parallel to the longitudinal direction of the row, with a drafting arrangement whose cylinders (3, 4, 5, 6, 7) are arranged approximately horizontally and at a right angle to the longitudinal direction of the row of combing heads (1), and with a can plate (10) and a funnel wheel (9) which are rotatable about the vertical axes, characterized in that between the said drive shaft (2) and a drafting arrangement drive shaft (14) which is parallel to the cylinders (3, 4, 5, 6, 7) of the drafting arrangement there is arranged a first V-drive (11, 12, 13) with a first crossed toothed belt (12) and that between a shaft (26) which is parallel to the drafting arrangement drive shaft (14) and a vertical drive shaft (33) for the can plate (10) and for the funnel wheel (9) there is arranged a second V-drive (30, 31, 32) with a second crossed toothed belt (31).
  2. A combing machine as claimed in claim 1, characterized in that at least one of the two crossed toothed belts (12, 31) is arranged in an enclosed chamber (45) and that means (47) are provided for maintaining a pressure above atmospheric in the chamber.
  3. A combing machine as claimed in claim 1 or 2, characterized in that the cylinders (3, 4, 5, 6, 7) of the drafting arrangement are driven by the drafting arrangement drive shaft (14) via further toothed belts (15, 19, 23, 24, 25, 28).
  4. A combing machine as claimed in one of the claims 1 to 3, characterized in that the funnel wheel (9) is driven from the vertical drive shaft (33) via a V-belt (36).
  5. A combing machine as claimed in claims 2, 3 and 4, characterized in that at least a part of the further toothed belts (15, 19, 23, 24, 25, 28) and V-belts (36) are also arranged in the enclosed chamber (45, 46).
  6. A combing machine as claimed in claim 4, characterized in that a driving belt pulley (37) for the V-belt (36) which is disposed on the vertical shaft (33) is arranged as a variable drive disk.
  7. A combing machine as claimed in one of the claims 1 to 6, characterized in that the can plate (10) is driven by the vertical drive shaft (33) via a step-down gear (34) and a chain (35).
EP94112681A 1993-08-25 1994-08-13 Combing machine Expired - Lifetime EP0640704B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2522/93 1993-08-25
CH252293 1993-08-25

Publications (2)

Publication Number Publication Date
EP0640704A1 EP0640704A1 (en) 1995-03-01
EP0640704B1 true EP0640704B1 (en) 1996-10-02

Family

ID=4235685

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94112681A Expired - Lifetime EP0640704B1 (en) 1993-08-25 1994-08-13 Combing machine

Country Status (5)

Country Link
US (1) US5502875A (en)
EP (1) EP0640704B1 (en)
JP (1) JP3432609B2 (en)
CN (1) CN1048766C (en)
DE (1) DE59400765D1 (en)

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Publication number Priority date Publication date Assignee Title
DE59904738D1 (en) 1998-05-13 2003-04-30 Rieter Ag Maschf MACHINE PROCESSING TEXTILE MATERIAL WITH A STRETCHER
CN1327059C (en) * 2003-12-30 2007-07-18 江苏宏源纺机股份有限公司 Coil driving device of combing machine
GB0811207D0 (en) * 2007-06-29 2008-07-23 Truetzschler Gmbh & Co Kg Apparatus for the fibre-sorting or fibre-selection of a fibre bundle comprising textile fibres, especially for combing
CH704224B1 (en) * 2007-06-29 2012-06-15 Truetzschler Gmbh & Co Kg Apparatus for sorting and selection of fibers of a fiber strand of textile fibers.
CH703786B1 (en) * 2007-06-29 2012-03-30 Truetzschler Gmbh & Co Kg Device for fiber sorting and -selection of a fiber structure made of textile fibers.
CH703154B1 (en) * 2007-06-29 2011-11-30 Truetzschler Gmbh & Co Kg Device for fiber sorting and -selection of a fiber structure made of textile fibers.
DE102008004098A1 (en) * 2007-06-29 2009-01-02 TRüTZSCHLER GMBH & CO. KG Device for fiber sorting or selection of a fiber structure of textile fibers, in particular for combing, which is fed via feeding means of a fiber sorting device, in particular combing device
GB0811191D0 (en) * 2007-06-29 2008-07-23 Truetzschler Gmbh & Co Kg Apparatus for the fibre-sorting or fibre-selection of a fibre bundle comprising textille fibre, especially for combing
ITMI20081098A1 (en) * 2007-06-29 2008-12-30 Truetzschler Gmbh & Co Kg EQUIPMENT FOR THE FIBER SORTING OR THE FIBER SELECTION OF A FIBER BAND INCLUDING TEXTILE FIBERS, ESPECIALLY FOR COMBING
CN107447300B (en) * 2017-08-10 2019-05-21 徐州锦丰纺织有限公司 Carding machine is used in a kind of weaving of efficient adjustable

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IN172476B (en) * 1988-02-12 1993-08-21 Rieter Ag Maschf
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Title
Klein, W.: Die Kurzstapelspinnerei, The Textile Institute, Fürth, Bd. 3, Seite 34 *

Also Published As

Publication number Publication date
CN1113271A (en) 1995-12-13
DE59400765D1 (en) 1996-11-07
EP0640704A1 (en) 1995-03-01
JP3432609B2 (en) 2003-08-04
US5502875A (en) 1996-04-02
JPH0770831A (en) 1995-03-14
CN1048766C (en) 2000-01-26

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