EP0755783A2 - Machine d'impression avec guidage rectiligne d'un substrat et dispositifs de retournement - Google Patents

Machine d'impression avec guidage rectiligne d'un substrat et dispositifs de retournement Download PDF

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Publication number
EP0755783A2
EP0755783A2 EP96111892A EP96111892A EP0755783A2 EP 0755783 A2 EP0755783 A2 EP 0755783A2 EP 96111892 A EP96111892 A EP 96111892A EP 96111892 A EP96111892 A EP 96111892A EP 0755783 A2 EP0755783 A2 EP 0755783A2
Authority
EP
European Patent Office
Prior art keywords
substrates
transport
printing
turning
printing units
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.)
Granted
Application number
EP96111892A
Other languages
German (de)
English (en)
Other versions
EP0755783A3 (fr
EP0755783B1 (fr
Inventor
Christian Dr. Compera
Martin Greive
Bernd Herrmann
Anton Rodi
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen 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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0755783A2 publication Critical patent/EP0755783A2/fr
Publication of EP0755783A3 publication Critical patent/EP0755783A3/fr
Application granted granted Critical
Publication of EP0755783B1 publication Critical patent/EP0755783B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/60—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing on both faces of the printing material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines

Definitions

  • the invention relates to a printing press with a plurality of printing units arranged in a row one behind the other, transport means for the straight-line transport of substrates to be printed through the printing units and a feeder on which the substrates are stacked and which has means for transferring the substrates to the transport means, and suitable turning devices for this.
  • the transport path of the substrates or sheets to be printed through the printing press due to the design, forms a multiply curved web, which has the desired side effect that the sheets transported along the web are stabilized.
  • the invention has for its object to provide a printing press that is more versatile than conventional printing presses.
  • This object is achieved according to the invention in a generic printing machine in that the means for transferring the substrates to the transport means are arranged such that the transport path of the substrates from the stack of feeders to the transport means is straight and lies in one plane with the transport path of the substrates into the printing units.
  • the printing machine according to the invention can be used not only to print flexible materials such as paper, but also materials such as cardboard, plastic, sheet metal, glass, etc., which cannot or must not be deformed because of their thickness or their material properties.
  • materials such as cardboard, plastic, sheet metal, glass, etc.
  • DE-PS 19 30 317 With this printing press, only the flat sheet transport through the printing units is essential, so that it can be assumed that common feeders are used, in which at least slight sheet deformation usually takes place.
  • the feeder is included in the flat transport path by pulling the substrates off the stack of feeders in one plane, accelerating them and placing them on the transport path through the printing units.
  • the cantilever can be included in an analogous manner in the flat transport path, in that the substrates are laid down in a straight line on the cantilever stack held at a corresponding height.
  • the top of the delivery stack can lie lower than the delivery point of the substrates from the printing units, the substrates which may have been braked by a braking device falling onto the delivery stack.
  • substrates of any thickness and even very stiff or even brittle substrates can be printed quickly and in large quantities with the invention, for example in offset printing.
  • the fact that this was not possible with conventional printing machines has so far been taken for granted taken and such substrates printed by other, less economical printing processes.
  • a number of printing units for face printing and a number of printing units for back printing which are arranged on a different side of the substrates to be printed than the printing units for face printing, are arranged one behind the other.
  • the printing machine shown in FIG. 1 contains a feeder 1 with a feed stack 2, which can be moved in height, on which the substrates to be printed are stacked, substrate take-off rollers 3 and a pair of transfer rollers 4.
  • a delivery arm 5 contains a delivery stack 6, which can be moved in height Pair of transfer rollers 7 and a brake device, not shown, which in its simplest form can be a stop at the rear end of the boom stack 6 in the machine longitudinal direction.
  • a first endless conveyor belt 8, which is guided around deflection rollers 9 and 10, and a second endless conveyor belt 11, which is guided around deflection rollers 12 and 13, are arranged in series between the feeder 1 and the delivery arm 5.
  • the upper run of the conveyor belt 8 and the lower run of the conveyor belt 11 lie one behind the other in one plane, the conveyor belts 8, 11 touching at one point on the circumference of the deflection rollers 10, 12.
  • Above the first conveyor belt 8, four printing units 14 for face printing are arranged one behind the other, and below the second conveyor belt 11 are four printing units 15 for reverse printing arranged one behind the other.
  • the printing units 14, 15 are shown schematically only as cylinders, which transfer the colors of the printing units 14, 15 to substrates, not shown, which rest on the upper run of the conveyor belt 8 or the lower run of the conveyor belt 11.
  • the substrates are successively drawn off from the feeder stack 2 by the substrate take-off rollers 3, accelerated by the transfer rollers 4 and conveyed to the first conveyor belt 8, which rotates around the deflection rollers 9, 10 in the direction of the arrow.
  • the substrates are transported by frictional engagement between the cylinders of the printing units 14 and the conveyor belt 8 along the printing units 14 and printed on one side.
  • the substrates separate from the conveyor belt 8 and pass onto the conveyor belt 11.
  • the conveyor belt 11 conveys the substrates, for example by frictional engagement between the cylinders of the printing units 15 and the conveyor belt 11 in the direction of the arrow, along the printing units 15, wherein they are printed on the other side.
  • the deflection roller 13 When the deflection roller 13 is reached, the substrates separate from the conveyor belt 11 and run between the pair of transfer rollers 7 in order to be deposited on the delivery stack 6.
  • the surface of the upper run of the conveyor belt 8 and the surface of the lower run of the conveyor belt 11 lie on one level except for a possible slight offset, which may be necessary with thicker substrates, and the feeder stack 2 is moved during operation so that the top substrate always lies in this plane.
  • On the cantilever side only the two transfer rollers 7 have to adjoin this plane (a substrate brake may also be suitably arranged), and the released substrates can fall onto the cantilever stack 6, the upper side of which in Operation is held slightly below the level of substrate transport by the printing units 14, 15.
  • the substrates can go through the printing process without any deformation, so that even very thick, very rigid or very fragile materials can be printed on both sides in multiple colors.
  • the conveyor belts 8, 11 can be provided with means which e.g. Generate electrostatic forces or negative pressure so that the substrates adhere to the rectilinear runs of the conveyor belts 8, 11, but detach again from the conveyor belts 8, 11 when the deflection rollers 10 or 13 are reached.
  • the printing units 15 and the conveyor belt 11 are omitted and the delivery arm 5 is arranged directly at the end of the conveyor belt 8.
  • the number of printing units for each substrate side can be varied as desired.
  • the printing units 14, 15 can be any conventional printing units, e.g. Offset printing units, or they are digital printing units, for which means of transport in the form of endless belts are particularly suitable. However, conventional substrate transport devices with chains and grippers can also be considered as means of transport.
  • FIGS. 2 ff. in which elements that correspond to the printing machine of FIG. 1 are identified by the same reference numerals.
  • FIG. 2 four printing units 16 are used for the counter pressure, which are arranged above a conveyor belt 17, that is to say in the opposite orientation to that in FIG. 1.
  • the upper run of the conveyor belt 17 with the pair of transfer rollers 7 of the boom 5 is in one plane.
  • the conveyor belt 8 and the conveyor belt 17 are arranged at a distance in the direction of the length of the printing press, and a turning unit 18 extends in the intermediate space.
  • the turning unit 18 consists of two rollers 19, 20 which are arranged at a distance which is greater than the intended maximum substrate length, and an endless turning belt 21 running around the rollers 19, 20.
  • the turning unit 18 is rotatably mounted as a whole about an axis 22 which runs between the rollers 19, 20 and parallel to their axes of rotation.
  • the upper run of the conveyor belt 8 and the upper run of the conveyor belt 17 run parallel, but offset in the direction of the height of the printing press by a distance which corresponds to the thickness of the turning unit 18, that is to say essentially the diameter of the rollers
  • the substrates are first printed in face printing by the printing units 14, as described in connection with FIG. 1, and then run on the turning belt 21, which is driven synchronously with the conveyor belt 14 by a drive, not shown (arrow S).
  • a drive not shown
  • the turning belt 21 stops and the turning unit 18 is rotated as a whole by a drive (not shown) by 180 ° about the axis 22 as indicated by arrows P.
  • the turning belt 21 starts up again in the opposite direction (arrow W) and transfers the substrate to the conveyor belt 17 with the printing units 16.
  • the substrate delivery is the same as that described in connection with FIG. 1.
  • the particular design of the turning unit 18 enables the substrates to also be a printing machine of the type shown in Fig. 2, i.e. can run through with identical printing units without deformation.
  • FIG. 3 A further turning device which leaves the substrates flat when turning is shown in FIG. 3, in which a printing machine similar to that of FIG. 2 is shown in perspective and in which elements that correspond to elements from FIG. 2 are identified by the same reference numerals.
  • the printing machine shown in Fig. 3 comprises the conveyor belt 8 and the printing units 14 for straight printing, which form a first transport path in connection with the feeder 1, and a conveyor belt 23 and printing units 24 for reverse printing, which in conjunction with a delivery 25 for reverse printing form the second transport route.
  • the first and the second transport path run parallel to one another at the same height, but are offset by a little more than the substrate width in the direction of the width of the printing press or the width of the substrates to be printed.
  • a turning pocket 26 is arranged in an intermediate space between the conveyor belt 8 and the conveyor belt 23.
  • the schematically illustrated turning pocket 26 is a rotationally symmetrical element with a number of compartments 27, which are arranged in a star shape around an axis 28.
  • the axis 28 extends parallel to the first and the second transport path and in the middle therebetween.
  • the turning pocket 26 is rotatably mounted about the axis 28.
  • Each Compartment 27 has substantially rectangular sides corresponding to the largest substrate format to be accommodated and is open on all sides except for one side which is adjacent to axis 28.
  • a compartment 27 lies in the extension of the first transport path through the printing units 14 for face printing, and a compartment 27 opposite with respect to the axis 28 lies in the extension of the second transport path through the printing units 24.
  • Each compartment 27 of the reversible pocket 26 has stops 29 shown schematically on the side toward the second transport path.
  • Two gripper shafts 30 are located on the circumference of the turning pocket 26 and somewhat outside of its turning radius at the level of the first transport path through the printing units 14 and two gripper shafts 31 at the level of the second transport path through the printing units 24.
  • the gripper shafts 30, 31 are each in the direction of the axis 28 spaced apart and rotatable about axes that are parallel to each other and perpendicular to the axis 28.
  • An endless transport device not shown in detail, runs around the gripper shafts 30 and 31, respectively.
  • a plurality of grippers 32 are fastened at intervals to each of these transport devices and can each reach into one of their compartments 27 in a specific position of the reversible pocket 26.
  • the gripper shafts 30, 31 and the grippers 32 have drive means (not shown) for rotation or for the gripping process.
  • a further boom 33 for straight printing is arranged behind the turning pocket 26.
  • a substrate separated by the feeder 1 is printed by the printing units 14 for fine printing from one side and then against the stops 29 in a compartment 27 of the Reversible pocket 26 inserted, which lies on a straight line with the first transport path through the printing units 14.
  • the grippers 32 rotating around the gripper shafts 30 grip the substrate and convey it to the delivery arm 33.
  • the turning pocket 26 continues in time with the printing press.
  • the turning pocket 26 has a clock drive (not shown), which holds a compartment 27 for the duration of the insertion or removal of the substrates in the extension of the respective transport routes.
  • the substrate to be printed in perfecting with the second transport path for reverse printing lies on a straight line, it is gripped by the grippers 32 rotating around the gripper shafts 31 and delivered to the printing units 24 for reverse printing, which then print the second side of the substrate print and convey the substrate into the boom 25.
  • the gripper shafts 30, 31 rotate synchronously with the reversible pocket 26, so that in one cycle two successive grippers 32 engage in a compartment 27 of the reversible pocket 26 and in the next cycle two other grippers 32 engage in the following compartment 27 of the reversible pocket 26.
  • the substrates can pass through the printing machine without deformation, as in the previous exemplary embodiment.
  • the exemplary embodiment shown in FIG. 3 has the advantage that different substrate transport paths result in face and back printing, which enable substrate removal separated by face and back printing.
  • a modular construction of the printing press is also possible.
  • the printing press or the turning device integrate excellently into an online operation with pre- or post-processing machines of all kinds.
  • FIG. 4 Another turning device which leaves the substrates flat when turning is shown in FIG. 4, in which a part of a printing press similar to that of FIG. 2 is shown in perspective.
  • the turning device shown in FIG. 4 contains a drum-shaped housing 34 with open ends.
  • the longitudinal axis of the housing 34 runs through the middle of a transport path of substrates 35 through several printing units 36 for face printing and through several printing units 37 for reverse printing.
  • a plurality of pairs of transport rollers 38 extend from wall to wall and perpendicular to its longitudinal axis.
  • the pairs of transport rollers 38 are arranged one behind the other in the direction of the longitudinal axis of the housing 34, at a distance from one another or from the closest printing unit 36, 37 that are smaller than the length of the substrates 35.
  • the pairs of transport rollers 38 with the printing units 36, 37 lie in one plane.
  • the drum-shaped housing 34 is rotatably mounted about its longitudinal axis and is connected to a drive, not shown, by means of which the housing 34 can be rotated back and forth by 180 ° or in steps of 180 ° in one direction.
  • the transport rollers 38 are either coupled in their horizontal positions to a drive, not shown, arranged outside the housing 34, or they have one or more drives which are located within the Housing 34 arranged and rotatable together with this (also not shown).
  • the substrates 35 are printed on one side by the printing units 36 and then transported into the housing 34 by frictional engagement between the cylinders of the printing units 36.
  • the housing 34 rotates 180 ° around the direction of travel of the substrate 35.
  • the transport rollers 38 continue to run inside the housing 34.
  • Guides can be arranged within the housing 34, which guide the substrates 35 on their way between the pairs of transport rollers 38.
  • the rotational speed of the housing 34 is dimensioned such that the substrate 35 is at the end of the 180 ° rotation at which the housing 34 stands still for a moment, just at the end of the housing 34 or between the last pair of transport rollers 38 from which it is then delivered to the printing units 37 and printed on the other side by them.
  • the timing of the housing rotation is controlled so that there is only one substrate 35 in the housing 34 while it is rotating. Either the housing 34 is always rotated in the same direction or back and forth. In the latter case, the transmission of drive movements to the housing 34 is facilitated.
  • the embodiment of FIG. 4 has the advantage that the substrates 35 can be turned over in the substrate running direction without acceleration or deceleration. As a result, even very sensitive substrates can be turned essentially without force, for example thin glass plates, and, as in the exemplary embodiments described above, can be printed without deformation if the feeder and the delivery arm are as described above also be arranged so that the substrate transport path is straight. 4, very high speeds can also be achieved.
  • FIG. 5 A modification of the turning device of FIG. 4 is shown schematically in FIG. 5. 5, five pairs of transport rollers 39 are arranged one behind the other along a substrate transport path indicated at the beginning and at the end by arrows, two successive pairs of transport rollers 39 being arranged rotated relative to one another by an angle of approximately 45 °, so that a helical transport path with an overall Angle of rotation of 180 ° is formed. Guides (not shown) on the edge 40 of the transport path through the turning device ensure that the substrates are not or only slightly deformed during transport and during transfer between the individual pairs of transport rollers 39. This embodiment is characterized in that only a few moving parts are required.

Landscapes

  • Delivering By Means Of Belts And Rollers (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
EP96111892A 1995-07-26 1996-07-24 Machine d'impression avec guidage rectiligne d'un substrat et dispositifs de retournement Expired - Lifetime EP0755783B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19527264A DE19527264A1 (de) 1995-07-26 1995-07-26 Druckmaschine mit geradliniger Substratführung und Wendeeinrichtungen dafür
DE19527264 1995-07-26

Publications (3)

Publication Number Publication Date
EP0755783A2 true EP0755783A2 (fr) 1997-01-29
EP0755783A3 EP0755783A3 (fr) 1997-11-19
EP0755783B1 EP0755783B1 (fr) 2002-05-15

Family

ID=7767814

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96111892A Expired - Lifetime EP0755783B1 (fr) 1995-07-26 1996-07-24 Machine d'impression avec guidage rectiligne d'un substrat et dispositifs de retournement

Country Status (6)

Country Link
US (1) US5732623A (fr)
EP (1) EP0755783B1 (fr)
JP (1) JPH0939202A (fr)
CN (1) CN1150088A (fr)
AU (1) AU6069796A (fr)
DE (2) DE19527264A1 (fr)

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CN107777396A (zh) * 2017-10-30 2018-03-09 广州广电运通金融电子股份有限公司 一种薄片介质正反面调整装置

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JP4760193B2 (ja) * 2005-07-29 2011-08-31 凸版印刷株式会社 枚葉印刷物の搬送装置
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CN101844698B (zh) * 2010-06-21 2012-06-06 深南电路有限公司 一种自转式翻板机
CN101844697B (zh) * 2010-06-21 2012-07-04 深南电路有限公司 一种自转式翻板机的定位机构
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DE102011055255A1 (de) 2010-11-12 2012-05-16 Schott Solar Ag Verfahren und Vorrichtung zum Transportieren und Wenden von flächigen Gegenständen
CN102531374B (zh) * 2012-02-24 2013-12-04 江苏秀强玻璃工艺股份有限公司 玻璃翻片机及工作方法
DE102012021404A1 (de) * 2012-10-30 2014-04-30 Eastman Kodak Company Bogenwendeeinheit und verfahren zum wenden eines bogens
DE102012021383B4 (de) * 2012-10-31 2015-10-15 Eastman Kodak Company Bogenwendeeinheit und Verfahren zum Wenden eines Bogens
CN102976140A (zh) * 2012-11-23 2013-03-20 东莞市锋驰印刷机械有限公司 一种设置翻转夹持收料装置收纸机
DE102017214689A1 (de) * 2016-09-13 2018-03-15 Heidelberger Druckmaschinen Ag Digitaldruckmaschine
DE102017214692A1 (de) * 2016-09-13 2018-03-15 Heidelberger Druckmaschinen Ag Digitaldruckmaschine
CN108327393A (zh) * 2018-04-10 2018-07-27 温州杰享机械科技有限公司 全自动平压平压痕模切烫金机
DE102019207185A1 (de) * 2019-05-16 2020-11-19 Siemens Aktiengesellschaft Druckeinrichtung und Verfahren zum Bedrucken eines Gegenstands
CN113022099B (zh) * 2021-02-26 2022-08-26 重庆市金利药包材料有限公司 一种药用包装袋生产装置
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CN113682871B (zh) * 2021-08-24 2023-05-26 山东之华管业有限公司 一种覆膜机收纸装置
CN114245703B (zh) * 2022-02-25 2022-05-13 新乡职业技术学院 一种电路板防划伤电气自动化治具

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US5732623A (en) 1998-03-31
EP0755783B1 (fr) 2002-05-15
DE59609206D1 (de) 2002-06-20
JPH0939202A (ja) 1997-02-10
CN1150088A (zh) 1997-05-21
DE19527264A1 (de) 1997-01-30
AU6069796A (en) 1997-01-30

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