EP0098415A2 - Plieuse pour une rotative à héliogravure - Google Patents

Plieuse pour une rotative à héliogravure Download PDF

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Publication number
EP0098415A2
EP0098415A2 EP83105796A EP83105796A EP0098415A2 EP 0098415 A2 EP0098415 A2 EP 0098415A2 EP 83105796 A EP83105796 A EP 83105796A EP 83105796 A EP83105796 A EP 83105796A EP 0098415 A2 EP0098415 A2 EP 0098415A2
Authority
EP
European Patent Office
Prior art keywords
pincer
cylinder
cam
actuator means
gripper
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.)
Withdrawn
Application number
EP83105796A
Other languages
German (de)
English (en)
Other versions
EP0098415A3 (fr
Inventor
Mario Pane
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.)
Officine Meccaniche Giovanni Cerutti SpA
Original Assignee
Officine Meccaniche Giovanni Cerutti SpA
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 Officine Meccaniche Giovanni Cerutti SpA filed Critical Officine Meccaniche Giovanni Cerutti SpA
Publication of EP0098415A2 publication Critical patent/EP0098415A2/fr
Publication of EP0098415A3 publication Critical patent/EP0098415A3/fr
Withdrawn legal-status Critical Current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
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/16—Rotary folders
    • B65H45/162—Rotary folders with folding jaw cylinders
    • B65H45/165—Details of sheet gripping means therefor
    • 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
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/16—Rotary folders
    • B65H45/162—Rotary folders with folding jaw cylinders
    • B65H45/168—Rotary folders with folding jaw cylinders having changeable mode of operation

Definitions

  • the present invention relates to an improved folder for a rotogravure printing press.
  • Folders for rotogravure printing presses known up to now have comprised a pincer cylinder and a counter rotating gripper cylinder parallel to and disposed substantially in contact with one another along a generatrix.
  • the pincer cylinder is provided externally with an odd number (normally five) of moveable pincer units distributed along respective rows coincident with an equivalent number of generatrices of the pincer cylinder.
  • the pincer cylinder further carries, in positions substantially intermediate between each pincer unit and the next in the direction of rotation of the cylinder, a blade or "pusher bar” operable to perform, in the region of the said contact generatrix of the said two cylinders, hereinbelow called the "release position", a radial out and back movement with respect to the pincer cylinder between a position totally withdrawn within the pincer cylinder and a position in which the said pusher bar projects partially from the pincer cylinder.
  • the gripper cylinder is provided externally with an even number (generally four) of gripper units moveably disposed along respective generatrices of the gripper cylinder, and is connected to the pincer cylinder in such a way that at each passage of a pusher bar through the release position there is a corresponding passage of a gripper unit, the pusher bar being interposed during its radial outward movement between the open jaws of the gripper of the said unit.
  • the operating mode described above has significant disadvantages in that, in the first place, because of the difference in the number of pincer units and the number of gripper units, a pincer unit cooperates with the same gripper unit only every n revolutions, where n is the number of gripper units, thereby creating a significant problem in the construction of pincer cylinders and gripper cylinders, and in the adjustment of their movement.
  • the object of the present invention is that of providing a folder for rotogravure printing machines which will be free from the above described disadvantages.
  • the said object is achieved by the present invention in that it relates to a folder for rotogravure printing machines comprising a pincer cylinder having uniformly distributed around its periphery a determined number of pincer units and a corresponding number of pusher bars; a gripper cylinder disposed parallel to the said pincer cylinder in a substantially tangential position thereto and carrying uniformly distributed around its periphery a given number of gripper units; first actuator means for displacing in succession each said pusher bar towards and away from an operative extracted position starting from a retracted rest position upon passage of the pusher bar itself through a release position facing the said gripper cylinder, and second actuator means for causing each said pincer unit to open in coincidence with the outward displacement of the associated pusher bar; characterised by the fact that the number of said pincer units and the number of said gripper units are equal to one another, control means being provided for controlling the operation of the said first and said second actuator means according to a given programme.
  • FIG. 1 there is illustrated a rotogravure printing machine generally indicated 1, and including at least a first printing cylinder 2 and at least a second printing cylinder 3, the support shafts of which, respectively indicated 4 and 5, are rotatably mounted on a support(not illustrated) - constituting the frame of the machine 1.
  • the cylinders 2 and 3 are able to cooperate by means of their facing surfaces, with a continuous web 6 of paper which has a width at most equal to the length of the cylinders 2 and 3 and advances, in use, along the machine 1 at a speed equal to the peripheral velocity of the cylinders 2 and 3.
  • These latter carry on their outer surfaces incisions reproducing that which it is desired to print and generally defining panels (not illustrated) each occupying a portion of the outer surface of the respective cylinder 2, 3.
  • the surface of each cylinder 2, 3 is in general sub-divided in annular strips (not illustrated) the width of which is equal to that of the said panels, and the development of which is equal to the height of the said panels, or to a multiple thereof.
  • the cylinders 2 and 3 are defined as “single incision” if each of the said strips contains a single panel, whilst they are defined as “double” or more incisions if each of the said strips contain two or more panels in the same column and which are different from one another.
  • the web 6 once completely printed on both its surfaces by the rollers 2 and 3, is forwarded by means of at least one return roller 7 to a longitudinal cutting unit 8 including a cutter cylinder 9 which, cooperating with the web 6, divides it into a plurality of strips 10 each of which corresponds to a respective annular strip of the said cylinders 2 and 3.
  • the strips 10 Downstream of the cutting unit 8, the strips 10 are superimposed in a predetermined order in such a way as to form a continuous bundle 11 which is supplied, by means of drive rollers 12 and 13 to a transverse cutting unit 14 including a cutting cylinder 15 and a counter cylinder 16. These latter, cooperating together, cut the continuous bundle 10 into successive segments 17 which hereinbelow will be indicated with the term "copies".
  • the copies 17 are fed in succession, by means of an accelerator or splitting unit 18 to a folder generally indicated 19 and are each constituted by a bundle of superimposed sheets the number of which is equal to that of the strips 10 and having a length equal to the height of the panels (not illustrated) of the cylinders 2 and 3.
  • each of the said sheets constitutes two pages of rotogravure to be produced and must therefore be folded in two transversely of its height, in the folder 19.
  • the folder 19 includes two counter rotating cylinders 20 and 21 keyed on to respective shafts 22 and 23 rotatably supported by the said frame (not illustrated) of the machine 1 and disposed parallel to and at a distance from one another such that the cylinders 20 and 21 are substantially tangential to one another along a generatrix.
  • the cylinder 20, which hereinbelow will be indicated with the term "pincer cylinder” has five external pincer units 24 disposed along respective generatric.es uniformly distributed around the cylinder, and five folder units 25 each of which is disposed between two adjacent pincer units 24.
  • the cylinder 21, which hereinbelow will be indicated with the term "gripper cylinder” has five external gripper units 26 disposed along respective uniformly distributed generatrices.
  • each pincer unit 24 includes two shafts 27 and 28 parallel to the shaft 22 and rotatably supported by two end walls (not illustrated) of the pincer cylinder 20.
  • the shaft 27 carries, keyed thereto at one end, an orthogonal lever 29 constituting a first rocker of an articulated twin rocker quadrilateral 30 the second rocker of which is constituted by a lever 31 keyed at one end onto a shaft 32 parallel to the shaft 27 and rotatably supported by the two end walls (not illustrated) of the pincer cylinder 20.
  • the free ends of the levers 29 and 31 are connected together by means of the link 33 which carries at its connection point with the lever 31 a roller 34 functioning as a cam follower for a cylindrical.
  • fixed cam 35 freely mounted on the shaft 22 and having externally, along its active profile, two recessed sections 36 and 37.
  • an orthogonal lever 38 constituting a first rocker of an articulated twin rocker quadrilateral 39 the second rocker of which is constituted by a lever 40 keyed at one end to a shaft 41 parallel to the shaft 28 and rotatably supported by the said end walls (not illustrated) of the pincer cylinder 20.
  • the free ends of the levers 38 and 40 are connected together by a link 42 which carries, connected at its connection point with the lever 40, a roller 43 serving as a cam follower for a cylindrical cam 44 supported freely by the shaft 22 and having externally, around its active profile, six recessed sections 45 and six recessed sections 46 disposed alternately-and uniformly distributed around the cam.
  • the link 42 further carries, connected thereto, a roller 47 coaxial with the roller 43 and having the same diameter as this latter.
  • the roller 47 serves as a cam follower for a rotatable cylindrical cam 48 constituted by two discs 48a and 48b ( Figures 4, 5 and 6) which are ridigly connected together.
  • the cam 48 is freely supported by the shaft 22, and of the discs 48a and 48b,the first has three and the second four raised zones respectively indicated 49a and 49b.
  • the zones 49a are uniformly distributed about the disc 48a at 120 0 from one another, whilst the zones 49b are disposed in pairs in such a way that each pair is spaced from the other by 120 0 and the zones of each pair form between one another an angle of 60°.
  • the zones 49 have a radius substantially equal to that of the cam 44 and extend radially to the outside of a cylindrical profile having a radius at most equal to that of the recessed sections 45 and 46.
  • the cams 44 and 48 are connected to one another in an angularly adjustable position as will be explained below and are rotated together by a drive device 50, which in the illustrated example is constituted,purely by way of example, by the toothed wheel 51 which can be rigidly angularly fixed to the cams 44 and 48 and coupled to a pinion 52 keyed onto a drive shaft 53 the angular velocity of which remains in a fixed ratio different from one with the angular velocity of the shaft 22.
  • curved pincers interspersed with bars 55, hereinafter indicated with the term “flat pincers” extending trarsersely from the shaft 28.
  • the ends of the curved pincers 54 and the flat pincers 55 are moveable with the respective shafts 27 and 28 to rotate between a closed operative position, in which they cooperate with an abutment surface 56 constituting a portion of the outer surface of the pincer cylinder 20, and an open position, in which they are spaced from the abutment surface 56.
  • each folder unit 25 includes a shaft 57 parallel to the shaft 22 and rotatably supported by the said two end walls (not illustrated) of the pincer cylinder 20.
  • the shaft 57 carries, keyed to one of its ends, an orthogonal lever 58 constituting a first rocker of a double rocker articulated quadrilateral 59 the second rocker of which is constituted by a lever 60 keyed to one end of a shaft 61 parallel to the shaft 22 and rotatably supported by the said two end walls (not illustrated) of the pincer cylinder 20.
  • the free ends of the levers 58 and 60 are connected together by means of a link 62 which has connected to it, at its point of connection to the lever 60, a roller 63 serving as a cam follower both for a fixed cylindrical cam 64 mounted freely rotatably on the shaft 22 and having externally, around its active profile, a recessed section 65, and for a rotatable cylindrical cam 66 freely supported by the shaft 22 and the active profile of which has at least five projecting zones 67 the radius of which is substantially equal to that of the cam 66, which extend radially outwardly from a cylindrical profile having a radius at most equal to that of the recessed section 65.
  • the zones 67 comprise three zones 67a and two zones 67b. These latter have a width about twice that of the zones 67a and form together an angle of 120 whilst the zones. 67a are distributed non-uniformly about the remaining 240°.
  • the cam 6 is driven to rotate by a drive device 68 which in the illustrated example is constituted, purely by way of example, by a toothed wheel 69 rigidly connected to the cam 66 and coupled to a pinion 70 keyed on a drive shaft 71 the angular velocity of which remains in a constant ratio with the angular velocity of the shaft 22.
  • a drive device 68 which in the illustrated example is constituted, purely by way of example, by a toothed wheel 69 rigidly connected to the cam 66 and coupled to a pinion 70 keyed on a drive shaft 71 the angular velocity of which remains in a constant ratio with the angular velocity of the shaft 22.
  • the shaft 57 has a longitudinally extending lateral projection 72 extending radially from the shaft 57 and carrying connected to its free end three aligned blades 73 disposed in a radial position with respect to the shaft 22 and constituting, as an assembly, a pusher bar 74 moveable with the shaft 57 between a retracted rest position in which the pusher bar 74 is disposed entirely within the outer surface of the pincer cylinder 20, and an extended operative position in which part of the pusher bar 74 projects radially outwardly of the outer surface of the pincer cylinder 20.
  • the folder 19 can be set up for production with or without accumulation by suitably adjusting the relative positions of the cams 44 and 48 and the cams 64 and 66 respectively.
  • Production without accumulation is effected by arranging the cams 48 and 66 in a relative position in which none of their projecting zones 49 and 67 prevent the rollers 47 and 63 from entering the respective recessed sections 46 and 65.
  • the discs 48a and 48b are disposed in such a way that the associated projecting zones 49a and 49b do not interfere with any of the recessed sections 45 or with any of the recessed sections 46.
  • the phase of the cam 66 is so arranged that the roller 63, which rolls about the axis of the shaft 22 at a velocity normally greater than that of the cams 66, passes over a double raised zone 67a before engaging the recessed section 65.
  • each copy 17 is received by a respective pincer unit 24 of the pincer cylinder 20 at a loading position in which the roller 34 engages the recessed section 36 of the fixed cam 35 and the roller 43 must again engage a recessed section 45 of the cam 44.
  • the curved pincers 54 of this latter are spaced from the abutment surface 56 in such a way as to permit the front edge of the associated copy 17 to advance into contact with the surface 56.
  • the release of the said copy 17 from the pincer cylinder 20 takes place when the associated pusher bar 74 passes the generatrix along which the cylinders 20 and 21 are disposed substantially in contact.
  • the said release position is reached by the pusher bar 74 simultaneously with the corresponding gripper unit 26 which has been previously opened by actuator means (not illustrated) and known per se carried by the gripper cylinder 21.
  • the copies 17 do-not become transferred one by one from the pincer cylinder 20 to the gripper cylinder 21 as in the operation without accumulation, but rather in stacks constituted by one copy 17 relating to a first impression and a second copy 17 relating to a second impression superimposed over one another in a predetermined order.
  • This two impression operation with accumulation is made possible by suitably arranging the phases of the cams 48 and 66, which are driven to rotate by the shafts 53 and 71 at a predetermined angular velocity different (normally less) from the speed of rotation of the shaft 22 and, therefore, of the pincer cylinder 20.
  • the recessed zones 67 of the cam 66 are superimposed over the recessed section 65 of the cam 64 in a sequence such that only one out of two rollers 63 which traverse in succession over the cam 64 engagesthe recessed section 65, whilst the others remain raised by the effect of one of the projecting zones 67.
  • the projecting zones 49 of the cam 48 interfere with one out of each two recessed sections 46 of the cam 44 in such a way that only one of each two rollers 43 which traverse in succession over the cam 44 engage the associated recessed section 46 thereof, whilst the others remain raised by the effect of engagement with the associated roller 47 with one of the projecting zones 49.
  • the cam 48 prevents a roller 43 from entering the recessed section 46 of the cam 44 for the whole of the time that the roller 63 which follows it in the direction of rotation of the pincer cylinder 20 is prevented from entering the recessed section 65 of the cam 64 by one of the projecting zones 67 of the cam 66.
  • the copies 17 advanced by the pincer cylinder 20 towards the release position to be taken up by the gripper units 26 are alternatively of a first and second type and are related one to a first impression and the other to a second impression of the cylinders 2 and 3.
  • the rotatable cams 66 driven by the shaft 71 is arranged with one of its projecting zones 67 in correspondence with the recessed section 65 of the cam 64 thereby preventing the lowering of the roller 63 and, therefore, preventing the pusher bar 74 from projecting out.
  • the cam 48 is disposed with its projecting zone 49 in correspondence with the recessed section 46 to cooperate with the roller 47 in such a way as to prevent the roller 43 from entering the associated recessed section 46 of the cam 44, whilst the roller 44 enters normally into the recessed section 37 of the fixed cam 35.
  • the said copy 17 of the first type is carried back by the pincer cylinder 20 towards the loading position at which the said copy 17 is maintained connected to the pincer cylinder 20 by the flat pincers 55 whilst the curved pincers 54 open to receive a second copy 17 (which will be of the second type given that there are an odd number of pincer units 24), and then by the curved pincers 54 whilst the flat pincers 55 open and then reclose onto the stack formed by the two superimposed copies 17. These latter are then sent forward towards the release position at which they are transferred normally to the gripper cylinder 21.

Landscapes

  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
EP83105796A 1982-07-05 1983-06-13 Plieuse pour une rotative à héliogravure Withdrawn EP0098415A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT6785082 1982-07-05
IT67850/82A IT1155725B (it) 1982-07-05 1982-07-05 Piegatrice perfezionata per macchine da stampa rotative rotocalco

Publications (2)

Publication Number Publication Date
EP0098415A2 true EP0098415A2 (fr) 1984-01-18
EP0098415A3 EP0098415A3 (fr) 1984-09-26

Family

ID=11305769

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83105796A Withdrawn EP0098415A3 (fr) 1982-07-05 1983-06-13 Plieuse pour une rotative à héliogravure

Country Status (3)

Country Link
EP (1) EP0098415A3 (fr)
JP (1) JPS5931252A (fr)
IT (1) IT1155725B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0355595A2 (fr) * 1988-08-20 1990-02-28 Albert-Frankenthal AG Appareil pour plier
WO1991012195A1 (fr) * 1990-02-19 1991-08-22 Albert-Frankenthal Aktiengesellschaft Appareil de pliage
EP1415943A1 (fr) * 2002-10-31 2004-05-06 Kabushiki Kaisha Tokyo Kikai Seisakusho Plieuse avec un mode de travail collection
WO2005102890A2 (fr) * 2004-04-26 2005-11-03 Koenig & Bauer Aktiengesellschaft Cylindre pour façonner des materiaux plats et cylindre integre a un appareil de pliage d'une machine a imprimer
US7513860B2 (en) 2004-04-26 2009-04-07 Koenig & Bauer Aktiengesellschaft Folding apparatus for collect operation
US7523700B2 (en) * 2004-04-26 2009-04-28 Koenig & Bauer Aktiengesellschaft Cylinder for processing flat material

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9320408U1 (de) * 1993-04-28 1994-06-23 Albert-Frankenthal Ag, 67227 Frankenthal Falzapparat für Rotationsdruckmaschinen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1810294A1 (de) * 1968-04-15 1969-10-23 Plamag Plauener Druckmaschinen Vorrichtung zum Steuern der Bogenfuehrungselemente eines 3:2 Sammelzylinders in Falzapparaten von Rotationsdruckmaschinen
DE2714915A1 (de) * 1977-04-02 1978-10-05 Koenig & Bauer Ag Rollenrotationsdruckmaschine
EP0066867A1 (fr) * 1981-06-08 1982-12-15 Motter Printing Press Co. Cylindre d'assemblage pour une plieuse rotative

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5618500A (en) * 1979-07-23 1981-02-21 Hitachi Ltd Module for electronic equipment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1810294A1 (de) * 1968-04-15 1969-10-23 Plamag Plauener Druckmaschinen Vorrichtung zum Steuern der Bogenfuehrungselemente eines 3:2 Sammelzylinders in Falzapparaten von Rotationsdruckmaschinen
DE2714915A1 (de) * 1977-04-02 1978-10-05 Koenig & Bauer Ag Rollenrotationsdruckmaschine
EP0066867A1 (fr) * 1981-06-08 1982-12-15 Motter Printing Press Co. Cylindre d'assemblage pour une plieuse rotative

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0355595A2 (fr) * 1988-08-20 1990-02-28 Albert-Frankenthal AG Appareil pour plier
EP0355595A3 (fr) * 1988-08-20 1991-01-09 Albert-Frankenthal AG Appareil pour plier
WO1991012195A1 (fr) * 1990-02-19 1991-08-22 Albert-Frankenthal Aktiengesellschaft Appareil de pliage
US5287805A (en) * 1990-02-19 1994-02-22 Albert-Frankenthal Aktiengesellschaft Folding apparatus
EP1415943A1 (fr) * 2002-10-31 2004-05-06 Kabushiki Kaisha Tokyo Kikai Seisakusho Plieuse avec un mode de travail collection
WO2005102890A2 (fr) * 2004-04-26 2005-11-03 Koenig & Bauer Aktiengesellschaft Cylindre pour façonner des materiaux plats et cylindre integre a un appareil de pliage d'une machine a imprimer
WO2005102890A3 (fr) * 2004-04-26 2006-05-26 Koenig & Bauer Ag Cylindre pour façonner des materiaux plats et cylindre integre a un appareil de pliage d'une machine a imprimer
EP1760022A1 (fr) * 2004-04-26 2007-03-07 Koenig & Bauer AG Cylindre pour façonner des materiaux plats
US7494455B2 (en) 2004-04-26 2009-02-24 Koenig & Bauer Aktiengesellschaft Cylinder for processing flat material
US7513860B2 (en) 2004-04-26 2009-04-07 Koenig & Bauer Aktiengesellschaft Folding apparatus for collect operation
US7523700B2 (en) * 2004-04-26 2009-04-28 Koenig & Bauer Aktiengesellschaft Cylinder for processing flat material

Also Published As

Publication number Publication date
IT8267850A0 (it) 1982-07-05
IT1155725B (it) 1987-01-28
JPS5931252A (ja) 1984-02-20
EP0098415A3 (fr) 1984-09-26

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Inventor name: PANE, MARIO