US3884026A - Method and apparatus for effecting replacement of cans in spinning frame - Google Patents

Method and apparatus for effecting replacement of cans in spinning frame Download PDF

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Publication number
US3884026A
US3884026A US406177A US40617773A US3884026A US 3884026 A US3884026 A US 3884026A US 406177 A US406177 A US 406177A US 40617773 A US40617773 A US 40617773A US 3884026 A US3884026 A US 3884026A
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US
United States
Prior art keywords
cans
row
slivers
space
full
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
US406177A
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English (en)
Inventor
Toshio Yoshizawa
Yasuo Yamada
Toshinori Taniguchi
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.)
Toyota Industries Corp
Original Assignee
Toyoda Automatic Loom Works Ltd
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
Application filed by Toyoda Automatic Loom Works Ltd filed Critical Toyoda Automatic Loom Works Ltd
Application granted granted Critical
Publication of US3884026A publication Critical patent/US3884026A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
    • D01H9/005—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing empty packages or cans and replacing by completed (full) packages or cans at paying-out stations; also combined with piecing of the roving
    • D01H9/008—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing empty packages or cans and replacing by completed (full) packages or cans at paying-out stations; also combined with piecing of the roving for cans
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/04—Arrangements for removing completed take-up packages and or replacing by cores, formers, or empty receptacles at winding or depositing stations; Transferring material between adjacent full and empty take-up elements
    • B65H67/0428—Arrangements for removing completed take-up packages and or replacing by cores, formers, or empty receptacles at winding or depositing stations; Transferring material between adjacent full and empty take-up elements for cans, boxes and other receptacles
    • 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

  • This invention relates to a method and an apparatus for effecting replacement of cans in a spinning frame of the type wherein drawing frame slivers accommodated in the cans are directly supplied to spinning units of the spinning frame.
  • the cans were adapted to be mounted on the upper portion of the spinning frame.
  • This arrangement is disadvantageous in that the work of replacement of the can is not accomplished in a simple manner and particularly in an automatic manner.
  • a further arrangement has been proposed to eliminate the abovedescribed disadvantage, which further arrangement is adapted to supply slivers to spinning units of the spinning frame from the sliver containing cans arranged on the floor of the mill.
  • the cans the number of which corresponds to the number of the spinning units, in a row or rows parallel to the row or rows of the spinning units since each spacing between the adjacent spinning units in the same row is very narrow relative to the can diameter. Therefore, the cans must be arranged Zigzag or in multiple rows for each row of the spinning units, requiring a large space for disposing the cans, and there remains only a small space between the adjacent spinning frames.
  • conveying means are provided to operatively connect a group of spinning frames arranged in parallel with one another to a group of drawing frames to thereby allow the full cans to be conveyed from the drawing frames to the spinning frames and the empty cans to be conveyed from the spinning frames to the drawing frames.
  • conveying means are provided to operatively connect a group of spinning frames arranged in parallel with one another to a group of drawing frames to thereby allow the full cans to be conveyed from the drawing frames to the spinning frames and the empty cans to be conveyed from the spinning frames to the drawing frames
  • a primary object of this invention is therefore to provide a method and an apparatus for exchanging cans in a spinning frame automatically, thereby to establish a system for automatic circulation of the cans through a drawing frame group and a spinning frame group.
  • Another object of this invention is to provide a can exchanging method which reduces the floor space occupied by the cans between the adjacent spinning frames.
  • two rows of cans are arranged along one side of a spinning frame to which slivers contained in the cans of said two rows are supplied simultaneously.
  • a discharge path for the cans in said one row to be removed thereto are provided therealong and an additional row of cans full of slivers are previously ar' ranged on a supply path along the other of said two rows of the cans.
  • the cans in said one row are firstly moved onto the discharge path and then the cans in the other row are moved in said one row and the full cans on the supply path are moved in the other row, whereby the exchange of the cans is completed.
  • FIG. 1 is a view illustrating an automatic can circulation system which connects a group of drawing frames with a group of spinning frames and in which the invention is embodied;
  • FIG. 2 is a diagrammatic view showing an apparatus according to the invention.
  • FIG. 3 is a diagrammatic view illustrating a manner of exchanging the cans in the spinning frame.
  • a can circulation system comprising means 5 for conveying full cans a from a group of drawing frames 4 to a group of spinning frames 1 in a direction A, and means 6 for returning empty cans d from the spinning frame group 1 to the drawing frame group 4 as shown. Since the can circulation system is adapted to be balanced between the outputs of the drawing frame group 4 and the spinning frame group 1, there are a necessary number of the full cans a on the conveying means 5 to be exchanged with the empty cans in the spinning frames when autocounters 17 (only one being shown) of the spinning frames indicate the absence of slivers in the respective cans.
  • the full cans a the number of which is half the number of cans installed in the spinning frames to which the slivers are supplied, are adapted to rest on can supply paths 15.
  • the cans b and c from which the slivers are supplied to the spinning frame 1 during spinning operation have to be arranged in two parallel rows along one side of the spinning frame 1 since the spacing between adjacent spinning units 1 1 is considerably small relative to the diameter of the can.
  • the amounts of slivers contained in the cans 1) before starting of the spinning operation are substantially half as much as those contained in the cans c so that the cans b in the inside row always become emptied in advance of the cans c in the outside row being emptied.
  • the replacement of the cans can be accomplished, after the cans b in the inside row have became empty, by eliminating the empty cans b in the inside row therefrom and moving the cans c, which are now half full of the slivers, from the outside row onto the inside row and thereafter moving the full cans a on the can supply path onto the outside row.
  • FIGS. 1 and 3 the empty can, the can full of the slivers and the can half full of the slivers are shown respectively by a circle, a whole hatched circle and a half hatched circle for convenience of the description.
  • the spinning frame 1 to which the replacement method of the invention is applied is formed under the spinning units 11 with a space 12 sufficient to accommodate a row of empty cans eliminated from the inside row.
  • the empty cans within the space 12 are supported on a movable carrying out path 14 positioned slightly below the level of the floor 13.
  • the carrying out path 14 is connected as shown in FIG. 1 to the empty can transportation means 6 to feed the empty cans back to the drawing frame group 4.
  • Extending between the adjacent spinning frames is the full can supply path 15 which is connected through a leading means 9 to the full can transportation means 5.
  • the movable supply path 15 may comprise an endless belt which is adapted to run in a direction B to place the full cans a along the front of the spinning frame when a call signal is issued from the auto-counter of the spinning frame.
  • the spinning frame shown in FIG. 2 is an open end spinning frame which can be easily so designed as to supply the slivers upwardly to the spinning units 11 and thereafter to further upward positions to be wound therein around bobbins and in which the space 12 can be effectively utilized to mount the cans.
  • This causes the floor area which is to be occupied by the cans to be minimized.
  • the supply of the slivers in the cans in the inside row to the corresponding spinning units can be carried out without causing the cans to be obstructed by the top of the space 12 and without the necessity of forming the space 12 in a special large size.
  • the auto-counter 17 operates to issue the call signal which is transmitted to a driving means 19 for the full can supply path 15 to drive the latter in the direction B.
  • the leading means 9 operates to induce the full cans a from the full can transportation mean 5 onto the full can supply path 15.
  • the latter is stopped.
  • the replacement of the cans are performed by piecing the leading ends of the slivers in the full cans on the supply path 15 with the trailing ends of some slivers remaining in the cans in the inside row, pushing the inside cans empty of the slivers onto the empty can carrying out path 14, moving the outside cans c substantially half full of the slivers to the inside row and moving the full cans a to the outside row.
  • all the cans in the inside and outside rows and on the full can supply path can be moved in the same direction when effecting the replacement of the cans, so that the replacement operation is greatly simplified.
  • each carrying out path 14 is preferably centrally disposed in the space 12, the carrying out path 14 being common to the cans on the opposite sides of the spinning frame to reduce the floor space.
  • the carrying out path 14 may be provided for each row of the inside cans without missing the advantage of moving all the cans in the same direction upon the can replacement.
  • a method of effecting replacement of cans in a spinning frame of the type in which slivers contained in the cans are directly supplied to lined up spinning units of the spinning frame which comprises, disposing the cans in inside and outside rows along the length of the spinning frame, the cans in the inside row containing about half as much slivers as the cans in the outside row, disposing a row of cans full of slivers backwardly of the outside cans therealong, the number of the full cans corresponding to that of the cans in one of the inside and outside rows, piecing the slivers in the full cans with the slivers in the cans in the inside row as the inside cans are ready to empty, removing the inside cans from the inside row inwardly onto a movable carrying out path arranged inside the inside row of the cans to extend along and out of the spinning frame, moving the outside cans inwardly into the inside row, and moving the full cans inwardly into the outside row.
  • An apparatus for replacement of cans in a spinning frame of the type in which slivers contained in the cans are directly supplied to lined up spinning units of the spinning frame comprising at least one first space for allowing the cans to be disposed in paired inside and outside rows along the length of the spinning frame, the cans in the inside row containing about half as much slivers as the cans in the outside row, a second space for allowing a row of cans full of slivers to be disposed backwardly of the outside cans therealong, the number of the full cans corresponding to that of the cans in one of the inside and outside rows, a third space provided in the lower part of the spinning frame for allowing the cans in the inside row to be received therein, said third space including a movable carrying out means arranged inside the inside row of the cans to extend along and out of the spinning frame, whereby the replacement of the cans is carried out by moving the inside cans in said first space onto said movable carrying out path of said third space after pie
  • said second space includes a movable full can supply path consisting of a conveyer which is associated with said conveying means connected with the drawing frame group to convey the full cans from the drawing frame group to the spinning frame group, whereby the cans are circulated through said first, second and third spaces, the drawing frame group and the spinning frame group.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
US406177A 1972-10-19 1973-10-12 Method and apparatus for effecting replacement of cans in spinning frame Expired - Lifetime US3884026A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47104734A JPS5022626B2 (it) 1972-10-19 1972-10-19

Publications (1)

Publication Number Publication Date
US3884026A true US3884026A (en) 1975-05-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
US406177A Expired - Lifetime US3884026A (en) 1972-10-19 1973-10-12 Method and apparatus for effecting replacement of cans in spinning frame

Country Status (4)

Country Link
US (1) US3884026A (it)
JP (1) JPS5022626B2 (it)
CH (1) CH570934A5 (it)
GB (1) GB1387536A (it)

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4012893A (en) * 1974-12-24 1977-03-22 Rieter Machine Works, Ltd. Method of loading transporting trolleys with full cans or the like and supplying full cans to spinning machines fed with fiber sliver and apparatus for implementing the method
US4033104A (en) * 1975-08-16 1977-07-05 W. Schlafhorst & Co. Method and device for replacing a sliver container
US4041686A (en) * 1976-12-17 1977-08-16 Toray Industries, Inc. Method of and arrangement for transporting yarn packages
US4083170A (en) * 1975-08-16 1978-04-11 W. Schlafhorst & Co. Devices for replacing the sliver containers in a rotor spinning machine
US4150534A (en) * 1976-10-14 1979-04-24 W. Schlafhorst & Co. Method and apparatus for exchanging sliver cans
US4169350A (en) * 1976-10-04 1979-10-02 Murata Kikai Kabushiki Kaisha Pneumatic spinning apparatus
US4537018A (en) * 1982-10-23 1985-08-27 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Apparatus for sliver can controlling in a spinning mill
EP0204202A2 (de) * 1985-06-03 1986-12-10 Maschinenfabrik Rieter Ag Anordnung zum Transportieren von Kannen für Textilmaterial
US4660369A (en) * 1984-01-21 1987-04-28 Murata Kikai Kabushiki Kaisha Bobbin transporting system
US4688300A (en) * 1985-09-10 1987-08-25 Trutzschler Gmbh & Co. Kg Apparatus for can changing
US4720967A (en) * 1986-01-22 1988-01-26 Zinser Textilmaschinen Gmbh Transport apparatus for roving bobbins for a group of spinning machines
US4735040A (en) * 1985-04-30 1988-04-05 Buro Patent Ag Method of and apparatus for the automatic feeding of filled cans and the automatic removal of empty cans from the spinning units of a spinning machine
US4856270A (en) * 1987-01-10 1989-08-15 Palitex Project Company Gmbh Automated textile thread processing system
US4956969A (en) * 1988-09-17 1990-09-18 W. Schlafhorst & Co. Method and apparatus for controlling the supply of sliver to the spinning stations of a spinning machine
US4977738A (en) * 1988-02-19 1990-12-18 Hans Stahlecker Process and a machine arrangement for sliver processing
US4987649A (en) * 1988-11-28 1991-01-29 Urs Meyer Method of automatic conveyance of textile material in recipients
US4995140A (en) * 1989-02-21 1991-02-26 Zinser Textilmaschinen Gmbh Sliver can transporting apparatus and method for a draw frame of a textile machine
US4999988A (en) * 1987-10-14 1991-03-19 Rieter Machine Works, Ltd. Method and apparatus for changing roven bobbins for a textile machine
US5086616A (en) * 1989-07-22 1992-02-11 Zinser Textilmaschinen Gmbh Transport system for production of textile filament
US5138828A (en) * 1989-08-30 1992-08-18 Hans Stahlecker Spinning facility having at least one exchanging cart for the exchange of cans
US5193333A (en) * 1990-05-18 1993-03-16 Loredana Brovelli Integrated system for drawing and spinning operations
US5226212A (en) * 1990-02-21 1993-07-13 Maschinenfabrik Rieter Ag Feed control apparatus for textile machinery
US5263228A (en) * 1989-03-23 1993-11-23 Howa Machinery Ltd. Apparatus for continuously supplying and piecing slivers to a roving frame
US5272863A (en) * 1991-04-16 1993-12-28 Fritz Stahlecker Spinning machine with sliver can transfer arrangement
US5272790A (en) * 1989-07-26 1993-12-28 Maschinenfabrik Rieter Ag Maintaining a predetermined quality of sliver in a card and/or drawframe
US5274884A (en) * 1989-07-26 1994-01-04 Maschinenfabrik Rieter Ag Maintaining a predetermined quality of sliver in a card and/or drawframe
US5287895A (en) * 1991-05-15 1994-02-22 Sulzer Brothers Limited Equipment for transporting and handling weft-yarn stock bobbins
US5347804A (en) * 1991-04-26 1994-09-20 Fritz Stahlecker Spinning machine with drivable guiding belts for transporting sliver
US5359841A (en) * 1990-12-21 1994-11-01 Fritz Stahlecker Spinning machine
US5396682A (en) * 1992-04-10 1995-03-14 Truzschler GmbH & Co. KG Apparatus for transporting coiler cans to and from the input side of a fiber processing machine
US5974630A (en) * 1997-09-16 1999-11-02 Langen; Manfred Spinning can stand
US6363702B2 (en) * 2000-04-12 2002-04-02 Evelyn Langen Transportation and storage system for rectangular spinning cans
CN111910306A (zh) * 2019-05-09 2020-11-10 北自所（北京）科技发展有限公司 并条机的空满条筒自动调度系统及方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51138941U (it) * 1975-05-01 1976-11-09
JPS51152807U (it) * 1975-05-30 1976-12-06
JPS5520802Y2 (it) * 1976-03-16 1980-05-19
GB9021041D0 (en) * 1990-09-27 1990-11-07 Rieter Scragg Ltd Bobbin transportation arrangement
JP2626459B2 (ja) * 1993-04-22 1997-07-02 村田機械株式会社 ケンス交換システム
CN104451958A (zh) * 2014-11-03 2015-03-25 镇江奥立特机械制造有限公司 一种纤维牵伸机的导丝转向装置
CN112301477B (zh) * 2020-11-03 2022-08-23 江苏大生集团有限公司 用于粗纱机条桶自动输送的条桶排列、操作方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125782A (en) * 1961-04-08 1964-03-24 Automatic can replacing apparatus for -a drawing frame
US3199152A (en) * 1961-12-29 1965-08-10 Toyoda Automatic Loom Works Circulatory system for moving the sliver cans in a spinning plant
US3648450A (en) * 1969-03-20 1972-03-14 Drahuska Brazdova Apparatus for the continuous spinning of textile fibers
US3716979A (en) * 1969-12-24 1973-02-20 Schubert & Salzer Maschinen Method and arrangement for supplying sliver to a fine spinning machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125782A (en) * 1961-04-08 1964-03-24 Automatic can replacing apparatus for -a drawing frame
US3199152A (en) * 1961-12-29 1965-08-10 Toyoda Automatic Loom Works Circulatory system for moving the sliver cans in a spinning plant
US3648450A (en) * 1969-03-20 1972-03-14 Drahuska Brazdova Apparatus for the continuous spinning of textile fibers
US3716979A (en) * 1969-12-24 1973-02-20 Schubert & Salzer Maschinen Method and arrangement for supplying sliver to a fine spinning machine

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4012893A (en) * 1974-12-24 1977-03-22 Rieter Machine Works, Ltd. Method of loading transporting trolleys with full cans or the like and supplying full cans to spinning machines fed with fiber sliver and apparatus for implementing the method
US4033104A (en) * 1975-08-16 1977-07-05 W. Schlafhorst & Co. Method and device for replacing a sliver container
US4083170A (en) * 1975-08-16 1978-04-11 W. Schlafhorst & Co. Devices for replacing the sliver containers in a rotor spinning machine
US4169350A (en) * 1976-10-04 1979-10-02 Murata Kikai Kabushiki Kaisha Pneumatic spinning apparatus
US4150534A (en) * 1976-10-14 1979-04-24 W. Schlafhorst & Co. Method and apparatus for exchanging sliver cans
US4041686A (en) * 1976-12-17 1977-08-16 Toray Industries, Inc. Method of and arrangement for transporting yarn packages
US4537018A (en) * 1982-10-23 1985-08-27 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Apparatus for sliver can controlling in a spinning mill
US4660369A (en) * 1984-01-21 1987-04-28 Murata Kikai Kabushiki Kaisha Bobbin transporting system
US4735040A (en) * 1985-04-30 1988-04-05 Buro Patent Ag Method of and apparatus for the automatic feeding of filled cans and the automatic removal of empty cans from the spinning units of a spinning machine
US4642851A (en) * 1985-06-03 1987-02-17 Maschinenfabrik Rieter Ag Conveying arrangement for conveying textile cans
EP0204202A3 (en) * 1985-06-03 1988-01-07 Maschinenfabrik Rieter Ag Arrangement for transporting sliver cans for textile materials
EP0204202A2 (de) * 1985-06-03 1986-12-10 Maschinenfabrik Rieter Ag Anordnung zum Transportieren von Kannen für Textilmaterial
US4688300A (en) * 1985-09-10 1987-08-25 Trutzschler Gmbh & Co. Kg Apparatus for can changing
US4720967A (en) * 1986-01-22 1988-01-26 Zinser Textilmaschinen Gmbh Transport apparatus for roving bobbins for a group of spinning machines
US4856270A (en) * 1987-01-10 1989-08-15 Palitex Project Company Gmbh Automated textile thread processing system
US4999988A (en) * 1987-10-14 1991-03-19 Rieter Machine Works, Ltd. Method and apparatus for changing roven bobbins for a textile machine
US4977738A (en) * 1988-02-19 1990-12-18 Hans Stahlecker Process and a machine arrangement for sliver processing
US4956969A (en) * 1988-09-17 1990-09-18 W. Schlafhorst & Co. Method and apparatus for controlling the supply of sliver to the spinning stations of a spinning machine
US4987649A (en) * 1988-11-28 1991-01-29 Urs Meyer Method of automatic conveyance of textile material in recipients
US4995140A (en) * 1989-02-21 1991-02-26 Zinser Textilmaschinen Gmbh Sliver can transporting apparatus and method for a draw frame of a textile machine
US5263228A (en) * 1989-03-23 1993-11-23 Howa Machinery Ltd. Apparatus for continuously supplying and piecing slivers to a roving frame
US5086616A (en) * 1989-07-22 1992-02-11 Zinser Textilmaschinen Gmbh Transport system for production of textile filament
US5272790A (en) * 1989-07-26 1993-12-28 Maschinenfabrik Rieter Ag Maintaining a predetermined quality of sliver in a card and/or drawframe
US5274884A (en) * 1989-07-26 1994-01-04 Maschinenfabrik Rieter Ag Maintaining a predetermined quality of sliver in a card and/or drawframe
US5138828A (en) * 1989-08-30 1992-08-18 Hans Stahlecker Spinning facility having at least one exchanging cart for the exchange of cans
US5226212A (en) * 1990-02-21 1993-07-13 Maschinenfabrik Rieter Ag Feed control apparatus for textile machinery
US5193333A (en) * 1990-05-18 1993-03-16 Loredana Brovelli Integrated system for drawing and spinning operations
US5359841A (en) * 1990-12-21 1994-11-01 Fritz Stahlecker Spinning machine
US5272863A (en) * 1991-04-16 1993-12-28 Fritz Stahlecker Spinning machine with sliver can transfer arrangement
US5347804A (en) * 1991-04-26 1994-09-20 Fritz Stahlecker Spinning machine with drivable guiding belts for transporting sliver
US5287895A (en) * 1991-05-15 1994-02-22 Sulzer Brothers Limited Equipment for transporting and handling weft-yarn stock bobbins
US5396682A (en) * 1992-04-10 1995-03-14 Truzschler GmbH & Co. KG Apparatus for transporting coiler cans to and from the input side of a fiber processing machine
US5974630A (en) * 1997-09-16 1999-11-02 Langen; Manfred Spinning can stand
US6363702B2 (en) * 2000-04-12 2002-04-02 Evelyn Langen Transportation and storage system for rectangular spinning cans
CN111910306A (zh) * 2019-05-09 2020-11-10 北自所（北京）科技发展有限公司 并条机的空满条筒自动调度系统及方法

Also Published As

Publication number Publication date
DE2352649A1 (de) 1974-05-02
CH570934A5 (it) 1975-12-31
JPS4962736A (it) 1974-06-18
JPS5022626B2 (it) 1975-08-01
DE2352649B2 (de) 1976-11-11
GB1387536A (en) 1975-03-19

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