EP0242702B1 - Procédé et dispositif pour tourner des objets plats - Google Patents

Procédé et dispositif pour tourner des objets plats Download PDF

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Publication number
EP0242702B1
EP0242702B1 EP87105170A EP87105170A EP0242702B1 EP 0242702 B1 EP0242702 B1 EP 0242702B1 EP 87105170 A EP87105170 A EP 87105170A EP 87105170 A EP87105170 A EP 87105170A EP 0242702 B1 EP0242702 B1 EP 0242702B1
Authority
EP
European Patent Office
Prior art keywords
conveyor
flat products
turning
stream formation
region
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
Application number
EP87105170A
Other languages
German (de)
English (en)
Other versions
EP0242702A1 (fr
Inventor
Erwin Müller
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.)
Ferag AG
Original Assignee
Ferag AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ferag AG filed Critical Ferag AG
Priority to AT87105170T priority Critical patent/ATE46489T1/de
Publication of EP0242702A1 publication Critical patent/EP0242702A1/fr
Application granted granted Critical
Publication of EP0242702B1 publication Critical patent/EP0242702B1/fr
Expired 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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/66—Advancing articles in overlapping streams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/003—Delivering or advancing articles from machines; Advancing articles to or into piles by grippers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/003—Delivering or advancing articles from machines; Advancing articles to or into piles by grippers
    • B65H29/005—Delivering or advancing articles from machines; Advancing articles to or into piles by grippers by chains or bands having mechanical grippers engaging the side edges of articles, e.g. newspaper conveyors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/31—Features of transport path
    • B65H2301/312—Features of transport path for transport path involving at least two planes of transport forming an angle between each other
    • B65H2301/3122—U-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/33—Modifying, selecting, changing orientation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/33—Modifying, selecting, changing orientation
    • B65H2301/332—Turning, overturning
    • B65H2301/3321—Turning, overturning kinetic therefor
    • B65H2301/33214—Turning, overturning kinetic therefor about an axis perpendicular to the direction of displacement and parallel to the surface of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/33—Modifying, selecting, changing orientation
    • B65H2301/332—Turning, overturning
    • B65H2301/3322—Turning, overturning according to a determined angle
    • B65H2301/33224—180°
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/33—Modifying, selecting, changing orientation
    • B65H2301/333—Inverting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/44—Moving, forwarding, guiding material
    • B65H2301/447—Moving, forwarding, guiding material transferring material between transport devices
    • B65H2301/4471—Grippers, e.g. moved in paths enclosing an area
    • B65H2301/44712—Grippers, e.g. moved in paths enclosing an area carried by chains or bands
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S271/00—Sheet feeding or delivering
    • Y10S271/902—Reverse direction of sheet movement

Definitions

  • the present invention relates to a method according to the preamble of patent claim 1 and an apparatus for carrying out the method according to the preamble of patent claim 3.
  • the supplied flat structures are introduced with their leading edge ahead into the conveying gap between a deflection drum and a support belt that wraps around it.
  • the peripheral speed of the deflection drum is equal to the peripheral speed of the support belt and these speeds are considerably greater than the speed of the sheetlike structures supplied.
  • a stationary stop is provided at the exit of the conveying gap, which stops the sheets emerging from the conveying gap at high speed and then drops them onto a conveyor, the conveying direction and speed of which essentially corresponds to that of the supplied sheets. This again creates a scale formation on the conveyor, but in which the edge leading in during the feeding of the flat structures becomes the trailing edge and vice versa the edge trailing in the feeding becomes the leading edge.
  • the invention is therefore based on the object of designing a method and a device of the type mentioned at the outset in such a way that the leading edge of the supplied flat structures remains the leading edge even in the removed flat structures, which overlaps part of the preceding flat structure.
  • FIGS. 1 and 2 In the device 10 shown, a feed conveyor 11 and a removal conveyor 12 and a deflection mechanism 13 arranged between them can be seen.
  • the feed conveyor 11 effective in the direction of the arrow 14 has driver cams 16 fastened at regular intervals from one another on an endless, guided chain 15 indicated by dash-dotted lines, each of which pushes a printed product 17 in front of it.
  • the mutual distance of the driving mocks 16 from one another is smaller than the format of the printed products 17 measured in the direction of the arrow 14, so that their leading edge (here the cut edge or flower) overlaps the trailing edge (here the fold or collar) of the preceding printed product.
  • the printed products 17 thus occur here in an orderly scale flow with a regular, so-called «scale spacing».
  • the removal conveyor 12 effective in the direction of arrow 19 is constructed analogously.
  • Driving cams 20 are fastened at intervals from one another to an endless, revolvingly driven and guided chain, which in turn push the now-turned printed products 17 (it will be come back to this later) at their trailing edge.
  • the distances of the driving cams 20 from one another correspond to those of the driving cams 16 from one another and the speed of the chain 19 corresponds - apart from the direction - to that of the chain 15.
  • the deflection device 13 - as can be seen in FIG. 2 - has two pairs of chains 21-21 and 22-22 rotating in parallel to one another, the deflection wheels 23, 24 (FIG. 1) arranged in pairs and in parallel axes and in between in upper rails 25, 25 'and lower rails 26, 26' are guided in a straight line.
  • Each of the chain pairs 21-21 and 22-22 is equipped with a total of six outwardly projecting supports 27 and 28, the spacing of which from one another - as seen in the straight-line sections of the chain pairs 21-21 and 22-22 - the distances between the driving cams 16 or 20 correspond from each other.
  • Each of the supports 17, 18 consists of two articulated couplers 29, 30 and 31, 32, which are articulated at their outer ends at 33 and 34 and are articulated at their inner ends at a distance from one another on the corresponding pair of chains 21-21 and 22-22.
  • the carriers 27 and 28 are each provided with a gripper 35 or 36, which has a jaw 37 or 38 which is fixed with respect to the corresponding articulated coupling 29 or 31 and which is fixed to the fixed jaw 37 by springs 40 or 41 or 38 to, d.
  • H. Has pivoted jaw 42 or 43 biased in the closed position.
  • the pivotable jaws 42 and 43 are via an invisible lever mechanism, of which only a laterally protruding plunger 42 ', 43' is visible, by means of stationary scenes 44, 45 from the closed position into the opening shown in dash-dotted lines in FIG. 2 and controllable back.
  • the parallel pairs of chains 21-21 and 22-22 are each driven via a sprocket 46 or 47 via chains, not shown, in synchronism with one another, at the same speed as the chains 15 and 19.
  • the distance between the carriers 27 and that the carrier 28 from each other - as long as they are on the straight line of the chain pairs 21-21 and 22-22 located between the deflection wheels 23, 24 - corresponds to that of the driving cams 16 and 20 from each other.
  • the grippers 35 and 36 as long as their carriers 27 and 28 on the rectilinear strands of the chain pairs 21-21 and 22-22 are absolutely synchronous with those from the feed conveyor 11 on a sliding table 48 (FIG. 1 above) deferred print products 17 run.
  • the sliding table 48 is less wide than the printed products 17, so that they protrude on both sides.
  • the grippers 35 and 36 are closed, as shown in FIG. 1 is shown at the top right next to section line 11-11. In this way, they grasp the printed product 17 located in their area on its lateral edges.
  • a roller track 49 is provided which follows the trajectory of the grippers 35, 36 and on the other hand one of the trajectory of the grippers 35, 36 following guide rail 50 around the outside.
  • the deceleration phase of the carriers 27, 28 and thus the grippers 35, 36 begins. This deceleration phase continues until the The articulation point of the articulated coupling 29, 31 on the corresponding chain pair 21-21 or 22-22 has left the deflection wheel 23.
  • the grippers 35, 36 thus run at the same speed as the conveyor 12 and the grippers can thus be opened, whereupon the corresponding printed product 17 is transferred to the conveyor 12.
  • Fig. 1 the upper side of the printed products 17 accumulating on the feed conveyor 11 is indicated by a thick line.
  • this side which was at the top lies at the bottom, but the scale formation present on the conveyor 11 has been preserved in the sense that the leading edge of each printed product overlaps the trailing edge of the preceding printed product 17 .
  • Each printed product is therefore turned around turning axes parallel to the conveying direction and the original formation has been retained.
  • the printed products 17 can also be produced with the leading bundle and the trailing flower on the feed conveyor 11 and can be carried away on the away conveyor.
  • the embodiment outlined in FIG. 3 differs from the previously described embodiment primarily in that one and the same individual conveyor 51 serves as the feed conveyor and as the away conveyor. This is essentially the same as the single conveyor described in CH-PS 644.816 (largely identical in content to DE-OS 3 102 242.1 and US-PS 4,381,056) with one difference. This difference consists in the fact that its grippers 52 are coupled at regular intervals from one another via a coupling element 54 to the chain 53, which is only indicated, but at the same time each gripper is pivotably articulated on the coupling member 54 about a pivot pin 55 directed transversely to the chain 53.
  • a roller 56 is arranged on the housing of each of the grippers 52, which are controlled in the open or closed position in the same way as in the abovementioned patents, and which cooperates with stationary scenes 57, 58, so that ultimately the scenes 57, 58 determine the pivoting position of the grippers 52 determine with respect to chain 53.
  • the printed products 17 resulting from the strand of the individual conveyor 51 appearing at the top in FIG. 3 in the same formation as in FIG. 1 are now taken over by an intermediate conveyor 59 constructed in a manner similar to the feed conveyor 11 or the removal conveyor 12, the driving catches 60 of which are at a greater distance are attached to each other on the only indicated chain 61 as the mutual distance of the grippers 52 on the chain 53.
  • the conveying speed of the intermediate conveyor 59 is so much higher than that of the individual conveyor 51 that one of the driving cam 60 always meets one of the grippers 52.
  • the driving mocks 60 thus pull the printed products 17 out of the mouth of the now opened grippers 52 and push them in front of them onto the sliding table 48, where they are taken over by the deflection mechanism 13, which is only shown schematically.
  • the carriers 27, 28 which carry the grippers 35, 36 and protrude outwards from the chains 21-21, 22-22 are not formed here by two articulated couplers, but rather are suitably fastened to the associated chains 21-21, 22-22 that they protrude from them at right angles.
  • the spacing of the carriers 27, 28 from one another corresponds to that of the driving cam 60 from one another and the rotational speed of the chains 21-21, 22-22 corresponds here to that of the intermediate conveyor 59.
  • the grippers 35, 36 and the printed product 17 captured by them suddenly get a higher speed as soon as the corresponding carrier 27, 28 or its associated chains 21-21, 22-22 runs onto the deflection wheel 23, which in this case is smaller than the deflection wheel 24 is.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Discharge By Other Means (AREA)
  • Registering Or Overturning Sheets (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Attitude Control For Articles On Conveyors (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)

Claims (9)

1. Procédé pour retourner des produits plats amenés en continu en une formation d'écailles au cours duquel ceux-ci sont saisis individuellement et individualisés par accélération dans la formation d'écailles tout en étant déviés autour d'un axe de déviation orienté transversalement à la direction de transport, puis amenés à un transporteur d'évacuation de façon à obtenir à nouveau une formation d'écailles, caractérisé en ce que, lors du retournement, les produits plats sont saisis uniquement dans leur partie antérieure, puis accélérés et déviés avec la partie postérieure libre et ralentis avant la libération sur le transporteur d'évacuation agissant dans la direction opposée à celle du transporteur d'amenée.
2. Procédé selon la revendication 1, caractérisé en ce que les produits plats saisis dans leur partie antérieure dans la direction d'amenée sont transportés avant la déviation à la même vitesse que dans le dispositif d'amenée pour le retournement.
3. Dispositif pour retourner des produits plats (17) amenés en continu en formation d'écailles sur un transporteur d'amenée (11), comprenant un mécanisme de déviation (13) monté en aval du transporteur d'amenée et composé d'au moins un organe de traction (21, 22) sans fin entraîné en continu lequel est passé autour d'une roue de renvoi sur laquelle les produits plats sont individualisés par accélération dans la formation d'écailles et déviés autour d'un axe de déviation orienté transversalement à la direction de transport, ainsi qu'un transporteur d'évacuation reprenant les produits plats du mécanisme de déviation et les transportant en formation d'écailles, caractérisé en ce que l'organe de traction (21, 22) est muni de supports (27, 28) disposés à des intervalles réguliers et dépassant vers l'extérieur à l'extrémité extérieure desquels sont montées des griffes (35, 36) destinées à saisir par le côté la partie respectivement antérieure d'un produit plat.
4. Dispositif selon la revendication 3, caractérisé en ce que le mécanisme de déviation (13) comprend deux paires de chaînes (21-21, 22-22) parallèles et entraînées en continu dont chacune est munie de support (27, 28) dépassant vers l'extérieur, et que les griffes (35, 36) sont agencées pour saisir par paires la partie respectivement antérieure de l'un et l'autre bord latéral d'un produit plat (17) amené.
5. Dispositif selon la revendication 4, caractérisé en ce que chacun des supports (27, 28) se compose de deux bielles (29, 30 ; 31, 32) articulées l'une sur l'autre et dont les autres extrémités sont articulées sur les chaînes correspondantes (21-21 ; 22-22), à deux points d'articulation situés à distance l'un de l'autre.
6. Dispositif selon l'une des revendications 3 à 5, caractérisé en ce que la vitesse de rotation de l'organe de traction (21-21 ; 22-22) correspond au moins à la vitesse de transport du transporteur d'amenée (11) et du transporteur d'évacuation (12).
7. Dispositif selon l'une des revendications 3 à 6, caractérisé en ce que dans la région de la section de la trajectoire des griffes (35, 36) dans laquelle l'organe de traction (21-21 ; 22-22) est guidé autour de la roue de renvoi (23) sont disposés des moyens de guidage, par exemple des rails-guides (50) et/ou des rouleaux de guidage (49) pour les produits plats (17).
8. Dispositif selon l'une des revendications 3 à 7, caractérisé en ce que le transporteur d'amenée est constitué par l'un des brins et le transporteur d'évacuation par l'autre brin d'un transporteur individuel (51) équipé de griffes (52) commandées pour la saisie de l'un des bords orientés transversalement à.la direction de transport de respectivement un produit plat (17).
9. Dispositif selon la revendication 5, caractérisé en ce que l'intervalle entre les points d'articulation des bielles articulées (29, 30 ; 31, 32) sur les chaînes correspondantes (21-21 ; 22-22) est plus petit que l'intervalle entre des supports (27, 28) successifs.
EP87105170A 1986-04-18 1987-04-08 Procédé et dispositif pour tourner des objets plats Expired EP0242702B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87105170T ATE46489T1 (de) 1986-04-18 1987-04-08 Verfahren und vorrichtung zum wenden kontinuierlich gefoerderter flaechengebilde.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1579/86 1986-04-18
CH157986 1986-04-18

Publications (2)

Publication Number Publication Date
EP0242702A1 EP0242702A1 (fr) 1987-10-28
EP0242702B1 true EP0242702B1 (fr) 1989-09-20

Family

ID=4213718

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87105170A Expired EP0242702B1 (fr) 1986-04-18 1987-04-08 Procédé et dispositif pour tourner des objets plats

Country Status (6)

Country Link
US (1) US4896874A (fr)
EP (1) EP0242702B1 (fr)
JP (1) JP2538243B2 (fr)
AT (1) ATE46489T1 (fr)
CA (1) CA1282365C (fr)
DE (1) DE3760577D1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0330868B1 (fr) * 1988-03-03 1992-04-22 Ferag AG Procédé et dispositif d'évacuation de produits imprimés, qui sont amenés en formation en écailles
SE468765B (sv) * 1991-05-24 1993-03-15 Wamag Idab Ab Sidogripande transportoer
US5451040A (en) * 1993-05-03 1995-09-19 R.R. Donnelley & Sons Co. Signature feeder for a binding line
EP0712736B1 (fr) * 1994-11-18 1999-02-10 Grapha-Holding Ag Méthode pour la fabrication de livres, brochures ou similaires reliés par adhésif
US5957449A (en) * 1995-04-11 1999-09-28 Grapha-Holding Ag Process and device for conveying a stream of print shop products
DE59606007D1 (de) * 1995-07-20 2000-11-23 Heidelberger Druckmasch Ag Verfahren und Vorrichtung zur Auslage bögenförmiger Produkte
CH692617A5 (de) 1998-02-27 2002-08-30 Ferag Ag Vorrichtung zum Verarbeiten von flexiblen, flächigen Erzeugnissen.
AU755468B2 (en) 1998-06-15 2002-12-12 Ferag Ag Apparatus for processing flexible, sheet-like products
DE19837095A1 (de) * 1998-08-17 2000-02-24 Weitmann & Konrad Fa Bogenauslegevorrichtung
DK0985617T3 (da) * 1998-09-04 2002-12-16 Ferag Ag Transportindretning for i en skælformation fremkommende, fleksible, flade genstande
ATE273229T1 (de) * 2001-01-24 2004-08-15 Ferag Ag Verfahren und einrichtung zum umgreifen von mit greifern gehalten geförderten, flachen gegenständen
ATE530481T1 (de) * 2009-04-23 2011-11-15 Mueller Martini Holding Ag Verfahren zum wenden von auf einem förderweg in einem förderstrom transportierten druckprodukten
CH705026A2 (de) * 2011-05-16 2012-11-30 Ferag Ag Einrichtung und Verfahren zur Erzeugung eines lückenlosen Schuppenstromes aus flächigen Produkteinheiten, insbesondere Druckprodukten.
CN116177270B (zh) * 2023-05-04 2023-07-07 常州宏业包装材料有限公司 一种瓦楞纸板翻板机

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3642274A (en) * 1970-08-07 1972-02-15 Francis Walter Herrington Sheet-supporting assembly for an inverter roll
CH644816A5 (de) * 1980-02-08 1984-08-31 Ferag Ag Foerdereinrichtung, inbesondere fuer druckprodukte, mit an einem umlaufenden zugorgan verankerten greifzangen.
CH652105A5 (de) * 1981-07-15 1985-10-31 Grapha Holding Ag Verfahren und vorrichtung zum speichern von druckbogen.
CH657114A5 (de) * 1982-06-02 1986-08-15 Ferag Ag Verfahren und vorrichtung zum verarbeiten von in einer schuppenformation anfallenden flaechigen erzeugnissen, insbesondere druckprodukten.
CH660579A5 (de) * 1983-06-09 1987-05-15 Ferag Ag Verfahren und vorrichtung zum zwischenspeichern von in schuppenformation anfallenden druckprodukten.
CH660171A5 (de) * 1983-06-09 1987-03-31 Ferag Ag Verfahren und vorrichtung zum zwischenspeichern von in einem schuppenstrom anfallenden druckprodukten, wie zeitungen, zeitschriften oder dgl.
JPS606548A (ja) * 1983-06-24 1985-01-14 Kitagawa Seiki Kk 板状物の反転機構
DE3404459A1 (de) * 1984-02-08 1985-08-14 Frankenthal Ag Albert Verfahren und vorrichtung zur auslage bogenfoermiger produkte in form eines schuppenstromes
US4566687A (en) * 1984-05-11 1986-01-28 Custom-Bilt Machinery, Inc. Transferring newspapers or the like from a moving belt to a series of clamps

Also Published As

Publication number Publication date
JPS62255340A (ja) 1987-11-07
DE3760577D1 (en) 1989-10-26
US4896874A (en) 1990-01-30
ATE46489T1 (de) 1989-10-15
JP2538243B2 (ja) 1996-09-25
EP0242702A1 (fr) 1987-10-28
CA1282365C (fr) 1991-04-02

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