EP0366038B1 - Einrichtung zum zickzackförmigen Falten und Stapeln einer Materialbahn - Google Patents

Einrichtung zum zickzackförmigen Falten und Stapeln einer Materialbahn Download PDF

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Publication number
EP0366038B1
EP0366038B1 EP89119616A EP89119616A EP0366038B1 EP 0366038 B1 EP0366038 B1 EP 0366038B1 EP 89119616 A EP89119616 A EP 89119616A EP 89119616 A EP89119616 A EP 89119616A EP 0366038 B1 EP0366038 B1 EP 0366038B1
Authority
EP
European Patent Office
Prior art keywords
clamping
stack
arrangement
deflecting
supporting element
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
EP89119616A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0366038A3 (en
EP0366038A2 (de
Inventor
Willi Felix
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.)
JOS. HUNKELER AG PAPIERVERARBEITUNGSMASCHINEN
Original Assignee
Jos Hunkeler AG Papierverarbeitungsmaschinen
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 Jos Hunkeler AG Papierverarbeitungsmaschinen filed Critical Jos Hunkeler AG Papierverarbeitungsmaschinen
Publication of EP0366038A2 publication Critical patent/EP0366038A2/de
Publication of EP0366038A3 publication Critical patent/EP0366038A3/de
Application granted granted Critical
Publication of EP0366038B1 publication Critical patent/EP0366038B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/02—Folding limp material without application of pressure to define or form crease lines
    • B65H45/06—Folding webs
    • B65H45/10—Folding webs transversely
    • B65H45/101—Folding webs transversely in combination with laying, i.e. forming a zig-zag pile
    • 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
    • B65H2701/10—Handled articles or webs
    • B65H2701/11—Dimensional aspect of article or web
    • B65H2701/112—Section geometry
    • B65H2701/1123—Folded article or web
    • B65H2701/11231—Fan-folded material or zig-zag or leporello

Definitions

  • the present invention relates to a device for zigzag folding and stacking a material web according to the preamble of claim 1.
  • Such a device is known for example from DE-OS 33 44 260.
  • This has a carriage which can be moved back and forth between two end positions, on which two deflection rollers delimiting a passage opening for a material web fed in from below are freely rotatably mounted. It has two band-shaped support elements, the load-bearing strands of which are each guided from a fixed attachment point to the respective deflection rollers.
  • Each support element is deflected by the associated deflecting roller and then guided in an S-shape via a first deflecting roller which is rotatably mounted on the slide and then via a second, stationary, freely rotatably supported deflecting roller, each to a further fixed fastening point.
  • the change in length of the section of the support element between the two deflection rollers compensates for the forced extension or shortening of the relevant load-bearing dream.
  • the material web fed from below is folded in a zigzag shape and stacked to form a stack resting on the support elements and building up from below. As soon as the stack has reached the desired height, the material web in the stack is cut by hand along a fold line and lifted off the top of the stack. In the meantime, the folding and stacking of the supplied material web continues. For the subsequent further processing in a high-speed processing device such as a tearing or cutting device, the folded material webs of the individual stacks are connected again.
  • a high-speed processing device such as a tearing or cutting device
  • the present invention is based on the object of creating a device according to the preamble of claim 1, which makes it possible to fold material webs fed into one another in a time-saving and labor-saving manner and largely avoid manual labor.
  • the endlessly designed support element is used when folding and stacking the material web held by means of a stationary holding element. It is thus used during folding and stacking to apply the material web to the stack to be formed. As soon as a finished stack is formed, the holding element releases the support element, so that it is driven in a rotating manner by drive means for conveying the finished stack away. When conveying away, the material web is drawn around the conveyor section of the finished stack. When the holding element is activated again and the drive means are switched off, the formation of a new stack can now be started without the material web having to be separated. Since the switching from folding and stacking to conveying away and back again can be done very quickly, the processing process of the material web is interrupted at most for a short time. The incoming continuous material web is thus automatically folded and stacked into stacks, which are connected to one another via the material web, without the need to glue material web sections.
  • the movement of the carriage is used to drive the endless support element for conveying away the finished stack.
  • a separate drive for the support element is therefore not necessary.
  • two clamping arrangements are provided on the slide, which can be activated alternately when the finished stack is removed.
  • first clamping arrangement When the first clamping arrangement is activated, the load-bearing dream of the endless one Support element firmly connected to the slide, while when the second clamping arrangement is activated, the supporting strand of the support element is moved in the opposite direction with respect to the direction of movement of the slide. The finished stacks are thus conveyed away regardless of the direction of movement of the carriage.
  • the clamping device can be brought into action on the deflecting arrangement or the second deflecting roller and the clamping arrangement on the respective deflecting element or the first deflecting roller in order to clamp the endless support element in place or with the carriage.
  • the support element is connected to the deflection arrangement or the deflection roller and to the deflection element or the first deflection roller without slippage. The action of the clamping device and the clamping arrangement on the support element is thus indirect.
  • the device shown in Figures 1 to 5 has a frame 10 which is only partially shown in the figures.
  • a carriage 12 is slidably guided, which can be moved back and forth in the direction of arrows A and B.
  • the carriage 12 is shown in its left end position, while the right end position is indicated by dashed lines and designated 12 '.
  • the carriage 12 is shown in its right end position 12 ', while in Figure 4 the left end position is indicated by dashed lines.
  • the carriage 12 has a frame 14 on which two deflecting rollers 16, 18 are freely rotatably mounted in the central region.
  • the slide 12 In the front and rear area of the slide 12, viewed in the direction of movement A of the slide 12, are in the frame 14 two deflection rollers 20, 22 of length compensation arrangements 23, 23 'freely rotatable.
  • the axes of rotation of the two deflection rollers 16, 18 and deflection rollers 20, 22 mounted in the slide frame 14 run parallel to one another and at right angles to the direction of movement A, B of the slide 12.
  • the opposite deflection rollers 16, 18 define a passage opening 24 between them which is essentially at right angles to Direction of movement A, B of the carriage 12 extends.
  • a flexible band 30 or 32 is guided in an S-shape over these deflecting rollers and deflecting rollers 16, 20, 26 and 18, 22, 28.
  • a plurality of belts arranged next to one another can also be provided, which are guided in the same way as the belt 30 or 32.
  • the band 30 is of finite length and is fixed at its ends to the mounting points on the frame 10 at 34 and 36.
  • Band 32 is endless formed and additionally guided around two rollers 38, 40 rotatably mounted on the frame 10.
  • a first section 30a or 32a of the belts 30, 32 runs from the one fastening point 34 or roller 40 in the direction of movement A, B of the carriage 12 above the latter to the deflecting rollers 16 or 18.
  • a second belt section 30b or 32b, which during the slide displacement maintains its length runs approximately parallel to the first belt section 30a or 32a from the deflection roller 16, 18 to the first deflection roller 20, 22.
  • the adjoining belt section 30c or 32c runs from the deflection roller 20 or 22 to the stationary deflection roller 26 or 28.
  • the belt sections 30d and 32d lie between the deflection rollers 26 and 28 and the second fastening point 36 and roller 38, respectively. These band sections 30d and 32d also do not change their length during the carriage movement.
  • the band sections 30c, 30d and 32c, 32d likewise run essentially parallel to the first band section 30a and 32a.
  • the section of the endless belt 32 lying between the two rollers 38 and 40 is designated 32e.
  • a symbolically illustrated stationary clamping device 42 In the area between the two rollers 36, 38 there is provided a symbolically illustrated stationary clamping device 42, the clamping member 43 of which in a clamping position shown in FIGS. 1, 4 and 5, in which it clamps the belt section 32e between itself and the frame 10 shown in Figures 2 and 3 and with 43 'designated rest position and can be transferred back.
  • clamping arrangements 44 and 46 are fastened to the slide frame 14.
  • the first clamping arrangement 44 is shown enlarged in FIG. 6 and the second clamping arrangement 46 in FIG.
  • Each of the two clamping arrangements 44, 46 has a clamping element 48 or 50 which, in the direction of the double arrows C and D, moves from a rest position shown in FIGS. 6 and 7 and 1, 4 and 5 to a contact with the belt 32 and with 48 'Or 50' shown clamping position can be transferred, as shown in Figures 2 and 3. If the arrow shown in the clamping element 48, 50 is directed away from the band 32, the clamping element 48, 50 is in the rest position.
  • the clamping elements 48, 50 are transferred into their clamping positions 48 ', 50'.
  • the clamping element 48 clamps the band section 32c between itself and the first deflection roller 22, which leads to the band 32 standing still with respect to the carriage 12.
  • the clamping element 50 clamps the band section 32d between itself and a stop member 52 also fastened to the slide frame 14.
  • the first band section 32a moves in the direction of the arrow B when the carriages 12 are moving in the direction of the arrow A.
  • a further stop (not shown) can be provided, but this must be designed such that it can be brought out of the area of the stack 56, 56a, 56b, 56c.
  • this stop 54 and, if appropriate, the further stop are not absolutely necessary, since the slide movement does not cause any displacement thereof during the formation of stacks 56, 56a, 56b, 56c.
  • Each stack 56, 56a, 56b, 56c is formed by superimposed sections 58 of an endless material web 60, which can be, for example, a paper web, as shown in FIG. 1.
  • This material web 60 is folded at the fold points 62. These fold points 62 are defined by perforations 64 which are arranged at regular intervals A and run at right angles to the longitudinal extent of the material web 60.
  • the material web 60 is guided from below through the passage opening 24 to the top of the belts 30 and 32, respectively.
  • a backstop (not shown) for the material web 60 can be provided below the passage opening 24.
  • a pressing element 66 is shown which can be lowered in the direction of arrow E onto the stack 56, 56a, 56b, 56c or can be lifted off the stack.
  • the reciprocation of the carriage 12 is generated by a crank mechanism 68.
  • This has a rocker arm 70 which is pivotally mounted at one end about an axis 70a and acts on the slide frame 14 at the other end.
  • This rocker arm 70 is articulated connected to a drive lever 72 which is eccentrically attached to a drive wheel 74 at the other end. The latter is driven in rotation by a motor 76.
  • the orbital movement of the drive wheel 74 results in a known swinging of the rocking lever 70 and thus a corresponding back and forth movement of the slide 12.
  • a conveying device 78 for conveying the finished stacks 56 away in the direction of the arrow F.
  • 80 denotes a light barrier which is provided above the belt 32 and is arranged offset twice to the left with respect to the stop 54 by the distance a.
  • the generally known drive arrangements (not shown) for the clamping device 42, the clamping arrangements 44, 46, the pressing element 66 and the conveying device 78, as well as the motor 76 and the light barrier 80 are connected to a controller 84 via lines 82 indicated by broken lines. This controls the entire device during the folding and stacking of the material web 60 and during the conveying away of the finished stacks 56, 56a, 56b, 56c resting on the load-bearing strand 32a or the conveying device 78.
  • FIG. 1 shows the first stack 56 to be formed during the folding and stacking process and FIG. 2 shows the finished stack 56.
  • 3 shows the position of the stack 56 after the first stroke of the carriage 12 in the direction of arrow B for conveying away the stack 56.
  • 4 is the second finished Stack 56a in the position in which formation of the third stack 56b begins; stack 56a is shown partially pushed onto first stack 56.
  • 5 the three finished stacks 56, 56a, 56b are shown pushed onto one another, the stack 56b being separated from the stop 54 by twice the distance a; the fourth stack 56c is not yet finished.
  • FIG. 8 shows a further embodiment of the device according to the invention for zigzag folding and stacking of the material web 60 in a representation according to FIG. 5.
  • the devices shown in these two figures are constructed exactly the same, with the exception that in the device according to FIG 1 to 5 shown with the reference numerals 44 and 46 clamping arrangements with the clamping elements 48 and 50 are replaced by a conveyor drive 86.
  • the reference numerals in this FIG. 8 refer to exactly the same parts as in the device according to FIGS. 1 to 5. These are therefore only described to the extent necessary for the understanding of FIG. 8.
  • the conveyor drive 86 has a conveyor motor 88 which is operatively connected to the roller 38 via a chain drive 90.
  • the endless belt 32 is guided in a slip-resistant manner around the roller 38, runs between the clamping member 43 and the frame 10 to the roller 40, from there in a known manner to the deflection roller 18 and S-shaped around the deflection rollers 22 and 28 back to the roller 38 .
  • the other band 30 is attached at one end to the mounting point 34 on the frame 10, runs to the circulating roller 16 and from there S-shaped around the two deflection rollers 20 and 26 to the fastening point 36, where it is fixed to the frame 10 at the other end.
  • the two deflecting rollers 16 and 18 and the two deflecting rollers 20 and 22 are freely rotatably mounted on the carriage frame 14 of the carriage 12 which can be moved back and forth in the direction of arrows A and B by means of the motor 76 and crank mechanism 68.
  • Three finished stacks 56, 56a, 56b lie on the conveyor 78 and the belt 32, the stack denoted by 56c still being finished by zigzag folding of the material web 60 fed through the through opening 24 from below.
  • the bulges of those sections of the material web 60 which connect two successive stacks 56, 56a, 56b, 56c to one another are designated by 58a.
  • the pressing element 66 is shown lifted off the stack 56c.
  • the device described above according to FIGS. 1 to 7 works as follows: For folding and stacking the supplied material web 60, the clamping member 43 of the clamping device 42 is transferred into the clamping position and the clamping elements 48, 50 of the clamping arrangements 44, 46 are in their rest position, as is indicated in FIG. 1 by the corresponding arrows.
  • the carriage 12 When the carriage 12 is in the left end position, the beginning of the material web 67 fed from below through the passage opening 24 is brought into abutment against the stop 54 and the pressing element 66 is lowered, so that the first section 58 of the material web 60 between the belt 30 and the pressing element 66 is jammed.
  • the pressing element 66 is raised according to the stack height until it reaches a predetermined level Number of folding operations is lifted from the stack 56 and transferred to the upper end position in the direction of arrow E.
  • the change in the length of the section 30a, 32a which is forced during the stacking process is supplemented by the opposite change in length of the belt section 30c, 32c.
  • the carriage 12 is transferred to the right end position 12 ', as shown in FIG. 2.
  • the clamping member 43 of the clamping device 42 is transferred to the rest position designated 43 'and the band 32 is clamped by means of the clamping arrangement 44.
  • the finished stack 56 lying on the first belt section 32a is carried along until the carriage 12 is in its left end position shown in broken lines.
  • the clamping element 48 is moved into its rest position and the clamping element 50 of the clamping arrangement 46 into the clamping position 50 '.
  • the first band section 32a moves due to the entrainment of the band section 32d, against the arrow direction A, so that the finished stack 56 is moved further in the arrow direction 56' until the stack 56 releases the light barrier 80, analogously to that indicated in FIG. 4 with the finished stack 56a shown on the right. Since the stroke of the carriage 12 is slightly larger than the distance a and the light barrier 80 is twice the distance a from the stop 54, this is just before the carriage 12 has reached its right end position 12 '.
  • the clamping element 50 is also moved into its rest position and the clamping member 43 of the clamping device 42 into the clamping position, as a result of which the stack 56 is held stationary when the carriage 12 continues to move.
  • the stack 56 is displaced in the direction of arrow 56 ', this has pulled the material web 60 so that a perforation 64 comes to rest against the stop 54 when the folding process begins again.
  • the pressing element 66 is lowered in each case for the formation of a new stack 56 with the carriage 12 located in the right end position 12 '.
  • a further stack 56a is formed in a manner analogous to that described above. Since the pressing element 66 is lifted from the stack 56a to be formed after a few folding steps, the section 58 lying on top of this stack 56a is released so that the height difference can be compensated for, which leads to a bulge 58a of the two uppermost sections 58.
  • the stack 56a is now shifted to the left by twice the distance a, in a manner analogous to that described above and shown in FIGS. 2 and 3, as shown in FIG.
  • the first stack 56 formed is pushed onto the removal device 78, but as a result of the stationary removal device 78, the distance between the two stacks 56 and 56a is reduced.
  • another stack 56b is formed in an analogous manner, which is again shifted to the left by twice the distance a after completion.
  • the second stack 56a is pushed towards the first stack 56, and then the last stack 56b formed is pushed onto the stack 56a.
  • the removal device 78 is controlled by the control 84 in such a way that that the stacks 56, 56a ... are conveyed away against one another.
  • a further stack 56c is now formed, which is then also conveyed in the direction against the removal device 78.
  • the material web 60 is thus processed into a multiplicity of stacks 56, 56a, 56b, 56c without having to cut them open.
  • the finished stacks 56, 56a ... can be fed by means of the removal device 78 to a station which continuously processes them, for example a tearing or cutting unit or an inserting machine.
  • the stroke of the carriage 12 is adapted in a known manner, as is the light barrier 80 with a smaller distance a in the direction against the stop 54 and with a larger distance a against this direction moved so that the distance between the stop 54 and the light barrier 80 is twice the distance a.
  • Different stack heights can be achieved by performing fewer or more strokes of the slide 12.
  • a stack 56, 56a ... which has been formed is conveyed by more than twice the distance a in the direction against the removal device 78.
  • the only condition that must be met is that a fold 62 occurs at a perforation 64 during the next folding. This means that the distance between the stop 54 and the last formed stack 56, 56a, 56b is one integer multiple of the distance a.
  • the embodiment of the device shown in FIG. 8 functions exactly the same as the device according to the figures. 1 to 5.
  • the clamping member 43 is in its clamping position and holds the band 32 with respect to the frame 10.
  • the carriage 12 is transferred to the right end position 12 'shown in FIG. 8'. In this position, the carriage 12 is stopped and the clamping member 43 is transferred to the rest position 43 '(see FIG. 2).
  • the belt 32 is now driven in a rotating manner in the conveying direction F by means of the conveyor drive 86 until the last finished stack 56 has passed the light barrier 80.
  • a clamping device which acts on a roller 38, 40 or the second deflection roller 28.
  • the belt 32 would have to be connected to the corresponding roller 38 or 40 or the deflection roller 28 without slippage.
  • a clamping arrangement is provided which acts on the deflection roller 18 or on the deflection roller 22. The belt 32 must in turn be connected to this deflection roller 18 or deflection roller 22 in a slip-free manner.
  • the clamping element 43 can be dispensed with if the conveyor drive 86 is designed in such a way, for example provided with a brake or a corresponding conveyor motor 88, that it is able to hold the endless belt 32 in place when the material web 60 is flattened.

Landscapes

  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
EP89119616A 1988-10-24 1989-10-23 Einrichtung zum zickzackförmigen Falten und Stapeln einer Materialbahn Expired - Lifetime EP0366038B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3836214 1988-10-24
DE3836214A DE3836214A1 (de) 1988-10-24 1988-10-24 Einrichtung zum zickzackfoermigen falten und stapeln einer materialbahn

Publications (3)

Publication Number Publication Date
EP0366038A2 EP0366038A2 (de) 1990-05-02
EP0366038A3 EP0366038A3 (en) 1990-11-28
EP0366038B1 true EP0366038B1 (de) 1993-03-24

Family

ID=6365814

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89119616A Expired - Lifetime EP0366038B1 (de) 1988-10-24 1989-10-23 Einrichtung zum zickzackförmigen Falten und Stapeln einer Materialbahn

Country Status (4)

Country Link
US (1) US5085624A (ko)
EP (1) EP0366038B1 (ko)
JP (1) JP2678390B2 (ko)
DE (1) DE3836214A1 (ko)

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US6321511B1 (en) 1988-05-20 2001-11-27 Bki Holding Corporation Packaging a strip of material with compression to reduce volume
US6176068B1 (en) 1998-04-23 2001-01-23 Bki Holding Corporation Packaging a strip of material in layers with intervening splices
US5065992A (en) * 1990-06-07 1991-11-19 Roll Systems, Inc. Method for processing web material
US5558318A (en) * 1991-01-15 1996-09-24 Roll Systems, Inc. Separator for forming discrete stacks of folded web
US5658638A (en) * 1995-09-18 1997-08-19 Hurletron Incorporated Insert card packaging method
EP0768261A1 (de) * 1995-10-12 1997-04-16 Solipat Ag Vorrichtung und Verfahren zum kontinuierlichen Abtafeln von bahnförmiger Ware
US6729471B2 (en) 1997-06-16 2004-05-04 Bki Holding Corporation Packaging a strip of material with compression to reduce volume
US6263814B1 (en) 1997-07-08 2001-07-24 Bki Holding Corporation Strip of material with splices and products formed therefrom
US6336307B1 (en) 1997-10-09 2002-01-08 Eki Holding Corporation Method of packaging a strip of material for use in cutting into sheet elements arranged end to end
FI110681B (fi) 1998-01-02 2003-03-14 Bki Holding Corp Menetelmä rainan pakkaamiseksi
US6293075B1 (en) 1999-03-08 2001-09-25 Bki Holding Corporation Packaging a strip of material
US6321512B1 (en) * 1999-03-08 2001-11-27 Bki Holding Corporation Method of packaging a strip of material
EP1067078A1 (en) * 1999-07-09 2001-01-10 Bartelt Hans Steven Mos Device for stacking continuous forms
DE19956846A1 (de) * 1999-11-26 2001-05-31 Gevas Verpackungsmaschinen Gmbh Packungseinheit
US6841019B2 (en) * 1999-12-10 2005-01-11 The Procter + Gamble Company Process for splicing the bottom end portion of the first stack of web material and the top end portion of the second stack of the material
WO2002076865A1 (en) * 2001-03-23 2002-10-03 Bki Holding Corporation Packaging a strip of material of varying width
WO2006015031A2 (en) * 2004-07-28 2006-02-09 Ethicon, Inc. Minimally invasive medical implant and insertion device and method for using the same
US7303524B2 (en) * 2005-07-14 2007-12-04 First Data Corporation Folder unit for processing sheet-like materials
DE102009032159B3 (de) * 2009-07-07 2011-01-27 Roth + Weber Gmbh Papierfaltung
DE102012015466B4 (de) * 2012-08-03 2015-01-22 Roth + Weber Gmbh Verfahren zur Faltung von Papier
DE102013219755A1 (de) * 2013-09-30 2015-04-02 Robert Bosch Gmbh Stapelvorrichtung

Citations (1)

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Publication number Priority date Publication date Assignee Title
DE3344260A1 (de) * 1983-12-07 1985-06-20 Jos. Hunkeler AG, Fabrik für graphische Maschinen, Wikon Vorrichtung zum zickzackfoermigen falten und stapeln von materialbahnen

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DE1141610B (de) * 1953-11-12 1962-12-27 Richard Kauschka Faltenlegevorrichtung fuer Warenbahnen
DE2402027A1 (de) * 1974-01-17 1975-07-31 Melzer Ohg Maschf Vorrichtung zur formatgleichen leporellofalzung einer endlosen materialbahn
CH660352A5 (de) * 1983-04-26 1987-04-15 Fischer Ag Brugg Georg Ablegeeinrichtung fuer plattenfoermige werkstuecke.
US4670001A (en) * 1985-12-13 1987-06-02 Campbell Joseph I Bottom stacking tray

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
DE3344260A1 (de) * 1983-12-07 1985-06-20 Jos. Hunkeler AG, Fabrik für graphische Maschinen, Wikon Vorrichtung zum zickzackfoermigen falten und stapeln von materialbahnen

Also Published As

Publication number Publication date
DE3836214A1 (de) 1990-04-26
JP2678390B2 (ja) 1997-11-17
US5085624A (en) 1992-02-04
EP0366038A3 (en) 1990-11-28
EP0366038A2 (de) 1990-05-02
DE3836214C2 (ko) 1992-08-27
JPH02270764A (ja) 1990-11-05

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