EP0703077A1 - Dispositif pour éviter des dommages dans un presse d'imprimerie - Google Patents

Dispositif pour éviter des dommages dans un presse d'imprimerie Download PDF

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Publication number
EP0703077A1
EP0703077A1 EP95113880A EP95113880A EP0703077A1 EP 0703077 A1 EP0703077 A1 EP 0703077A1 EP 95113880 A EP95113880 A EP 95113880A EP 95113880 A EP95113880 A EP 95113880A EP 0703077 A1 EP0703077 A1 EP 0703077A1
Authority
EP
European Patent Office
Prior art keywords
web
separating
holding device
dryer
printing material
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
EP95113880A
Other languages
German (de)
English (en)
Other versions
EP0703077B1 (fr
Inventor
Werner J. Kotterer
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.)
Baldwin Grafotec GmbH
Original Assignee
Grafotec GmbH
Acrotec GmbH
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 Grafotec GmbH, Acrotec GmbH filed Critical Grafotec GmbH
Publication of EP0703077A1 publication Critical patent/EP0703077A1/fr
Application granted granted Critical
Publication of EP0703077B1 publication Critical patent/EP0703077B1/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
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/18—Web break detection

Definitions

  • the invention relates to a device for preventing damage to a web-fed rotary printing press comprising a dryer due to a web break.
  • Separating and holding devices are also known which cut through the printing material web between the printing units and the dryer and then pinch them. This eliminates a disruptive influence of the run of the printing material web located in the dryer. Winders in the area of the last printing unit are accepted because only the strand between the printing units can be wound up in one layer. At high However, machine speeds result in a winding thickness that can lead to machine damage.
  • the invention has for its object to provide a device with which damage to the printing units in the event of a tear in the printing material web is effectively prevented even in the case of high-speed printing presses with long dryers.
  • this is achieved in that a web catching device, and a separating and holding device connected downstream in the web running direction, which are arranged between the last printing unit and the dryer, and a web break device and the separating and holding device which bring the web break detector into operation are provided in succession.
  • the strand of the printing material web located in the printing unit is wound onto the winding roller by the web catching device.
  • the run leading to the dryer is tightened briefly by the winding roller, so that in this state it can be separated cleanly from the cutting means of the separating and holding device which come into operation with a slight time delay, transversely to the longitudinal direction of the web.
  • the anyway short, located between the take-up roller and the separating and holding device Printing material web therefore does not have an oblique tear edge which, on further winding up of the run coming from the printing units, can pull it more strongly on one side, thus avoiding a risk of tearing, particularly in the area of the drawing-in unit.
  • the separating and holding device not only ensures that no web parts can be pulled out of the dryer, but that the strand located in the dryer is not transported into the dryer, for example through the blowing nozzles. The dryer does not have to be opened to remove this strand.
  • the web break detector is preferably a sensor which scans the printing material web without contact and which controls a control unit which brings the web catching device and, with a slight time delay, the separating and holding device into operation. In this way, very short response times of the device according to the invention can be achieved.
  • control unit has a time delay element for controlling the separating and holding device.
  • a separating and holding device which comes into operation with a delay due to the inertia is used.
  • the web catching device advantageously has a take-up roller driven by a motor with a circumferential speed that is above the web running speed.
  • the speed of the motor is infinitely variable; the control unit then has a control element which slows down the peripheral speed of the winding roller after the printing material web has been detected to the web running speed. This avoids an acceleration of the run of the printing material web located between the printing units as a result of the enlargement of the winding diameter of the winding roller, which could lead to a further tear.
  • the offset roll rotary printing machine has an intake unit 1, a plurality of printing units 2 and a dryer 3.
  • the arrangement is such that a printing material web 4 runs straight through in the direction of arrow a through the printing units 2 and the dryer 3.
  • a web catching device generally designated 5
  • a separating and holding device generally designated 6.
  • the separating and holding device 6 is connected downstream of the web catching device 5 in the web running direction a.
  • the two devices 5 and 6 are expediently arranged immediately adjacent to one another, so that there is only a short piece of the printing material web 4 between them.
  • the web catching device 5 and the separating and holding device 6 in the exemplary embodiment are combined to form one structural unit.
  • the invention can also be applied to other types of printing press.
  • the web catching device 5 has a take-up roller 7 which, in the reset shown in FIG. 2, does not touch the printing material web.
  • the take-up roller 7 is driven via a drive gear chain (not shown) having a gearwheel by means of a motor 8, for example an electric geared motor.
  • the web catching device furthermore has a swivel frame 9 which can be swiveled about a fixed axis 10.
  • the pivot frame 9 receives an axis 11 about which a counter-pressure roller 12 is loosely rotatable.
  • a counter-pressure roller can also be mounted on the axis 11.
  • the swivel frame 9 bears under the action of a spring (not shown) on a locking pin 13 of a release device 14, for example an electromagnet or a hydraulic or pneumatic cylinder. If the locking pin 13 is withdrawn, the swivel frame 9 can pivot in the direction of arrow b and thereby press the printing material web 4 onto the winding roller 7.
  • a spring not shown
  • the swivel frame 9 can pivot in the direction of arrow b and thereby press the printing material web 4 onto the winding roller 7.
  • any other known catching device can also be used.
  • the separating and holding device 6 is arranged in the web running direction a directly adjacent to the web catching device 5. This has a stationary knife bar 15 with a knife 16 and, on the side facing the dryer, a terminal block 17.
  • a lifting beam 18 is arranged to be movable in or against the direction of the arrow c.
  • This carries on its top a counter-holder 19, which cooperates with the knife 16 for cutting, and a clamping surface 20, between which and the clamping strip 17 the web 4 can be fixed.
  • a counter-holder 19 which cooperates with the knife 16 for cutting, and a clamping surface 20, between which and the clamping strip 17 the web 4 can be fixed.
  • separating and holding device 6 shown another known separating and holding device can also be used, which separates the printing material web and holds the strand leading to the dryer.
  • a web break detector 21 is provided which, in the exemplary embodiment, is designed as a contactlessly scanning sensor 4.
  • the web break detector 21 is expediently arranged between the separating and holding device 6 and the dryer 3.
  • the web break detector 21 issues a trigger signal to a control unit 22.
  • This control unit 22 has a microprocessor 23 which, in the event of a trigger signal emitted by the web break detector, activates the triggering device 14 so that the locking pin 13 is withdrawn.
  • the swivel frame 9 can pivot in the direction of arrow b and thereby press the printing material web 4 against the take-up roller 7 via the counter-pressure roller 12.
  • the printing material web 4 can be brought to the winding roller 7 in a comparatively large wrap area by means of a rod-shaped deflection member 25 on the swivel frame 9.
  • the winding roller 7 is driven in the illustrated embodiment by means of the motor 8 at a peripheral speed which is above the running speed of the printing material web 4 during printing, for example this speed exceeds 15%.
  • the microprocessor 23 begins to reduce the speed of the motor 8 and thus the take-up roller 7 to an extent that corresponds to the respective web running speed of the now not driven Printing material web 4 is determined taking into account the winding diameter of the roller 7 which increases as a result of the winding.
  • the web catching device 5 therefore does not exert any further acceleration on the printing material web 4 after the phase of the increased peripheral speed of the winding roller 7 when the web catching device 5 responds, so that the danger is eliminated that the winding roller 7 causes another web break.
  • the control device 22 also has a time delay element 24 which controls the separating and holding device 6 with a slight time delay.
  • the counter-holder 19 with the clamping surface 20 is guided against the cutter bar 15 via a pneumatic or hydraulic cylinder or an electromagnet.
  • the short part of the printing material web 4 located between the winding roller 7 and the counterpressure roller 12 and the knife 16 when the web catching device 5 is triggered cannot, due to the cut made at right angles to the web running direction, cause a unilaterally enlarged winding diameter when winding onto the winding roller 7 Wide uneven train could lead to the run of the printing material web 4 located in the printing units 2.
  • the risk of a further tear of the printing material web 4 in the area of the feed mechanism is therefore avoided.
  • a time delay element 24 a separating and holding device 6 can also be used, the response time of which is so great that the cut of the printing material web 4 only takes place when the winding roller 7 has gripped the printing material web 4 with such a circumferential area that further winding is ensured is.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Rotary Presses (AREA)
EP95113880A 1994-09-14 1995-09-05 Dispositif pour éviter des dommages dans un presse d'imprimerie Expired - Lifetime EP0703077B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4432659 1994-09-14
DE4432659A DE4432659A1 (de) 1994-09-14 1994-09-14 Einrichtung zum Verhindern von Druckwerksschäden

Publications (2)

Publication Number Publication Date
EP0703077A1 true EP0703077A1 (fr) 1996-03-27
EP0703077B1 EP0703077B1 (fr) 1998-04-08

Family

ID=6528152

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95113880A Expired - Lifetime EP0703077B1 (fr) 1994-09-14 1995-09-05 Dispositif pour éviter des dommages dans un presse d'imprimerie

Country Status (3)

Country Link
US (1) US5619923A (fr)
EP (1) EP0703077B1 (fr)
DE (2) DE4432659A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998016385A1 (fr) * 1996-10-11 1998-04-23 Koenig & Bauer Ag Dispositif de fixation pour support d'impression
DE10327910B4 (de) * 2003-06-20 2012-01-26 Baldwin Germany Gmbh Bahnfangvorrichtung
DE102004014777B4 (de) * 2004-03-26 2014-04-10 Baldwin Germany Gmbh Bahnfangvorrichtung einer Rollenrotations-Druckmaschine
JP4876861B2 (ja) * 2006-11-13 2012-02-15 富士ゼロックス株式会社 印刷システム、制御装置およびプログラム
JP7083811B2 (ja) * 2017-03-24 2022-06-13 住友重機械工業株式会社 制御装置
TR202019502A2 (tr) * 2020-12-02 2021-01-21 Etapak Baski Ambalaj Sanayi Ve Ticaret Anonim Sirketi Baski maki̇neleri̇nde kullanilmak üzere tasarlanan bi̇r fi̇lm yakalama terti̇bati

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0318853A2 (fr) * 1987-12-02 1989-06-07 Grafotec Kotterer Gmbh Dispositif pour éviter d'endommager les machines
EP0476437A1 (fr) * 1990-09-15 1992-03-25 Grafotec Kotterer Gmbh Méthode et dispositif pour saisir une bande d'impression déchirée
EP0502408A1 (fr) * 1991-03-05 1992-09-09 Grafotec Kotterer Gmbh Procédé et appareil pour surveiller une bande continue
EP0525450A1 (fr) * 1991-07-23 1993-02-03 Grafotec Kotterer Gmbh Dispositif pour couper et maintenir une bande déchirée
GB2263437A (en) * 1992-01-21 1993-07-28 Heidelberger Druckmasch Ag Web handling between printing press and dryer.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2683195A (en) * 1950-10-14 1954-07-06 Cutler Hammer Inc Paper break control device
US2821914A (en) * 1954-11-30 1958-02-04 Tribune Company Web severing device for printing presses
DE3215473C2 (de) * 1982-04-24 1985-03-07 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum Verhindern von Druckwerksschäden bei Druckträgerbahnrissen
US4532500A (en) * 1982-09-02 1985-07-30 Pako Corporation Web tension and break sensor system for photosensitive web processors
US4846060A (en) * 1988-07-25 1989-07-11 Iotec Manufacturing, Inc. Printing web tensioning system
US5063845A (en) * 1990-02-16 1991-11-12 Perretta Graphics Corporation Anti-wrap for high speed printing press
US5398610A (en) * 1993-03-25 1995-03-21 Baldwin Web Controls Anti-wrap device for a web press
US5365843A (en) * 1993-05-26 1994-11-22 Heidelberg Druckmaschinen Ag Printing press with web breaking assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0318853A2 (fr) * 1987-12-02 1989-06-07 Grafotec Kotterer Gmbh Dispositif pour éviter d'endommager les machines
EP0476437A1 (fr) * 1990-09-15 1992-03-25 Grafotec Kotterer Gmbh Méthode et dispositif pour saisir une bande d'impression déchirée
EP0502408A1 (fr) * 1991-03-05 1992-09-09 Grafotec Kotterer Gmbh Procédé et appareil pour surveiller une bande continue
EP0525450A1 (fr) * 1991-07-23 1993-02-03 Grafotec Kotterer Gmbh Dispositif pour couper et maintenir une bande déchirée
GB2263437A (en) * 1992-01-21 1993-07-28 Heidelberger Druckmasch Ag Web handling between printing press and dryer.

Also Published As

Publication number Publication date
EP0703077B1 (fr) 1998-04-08
DE59501831D1 (de) 1998-05-14
DE4432659A1 (de) 1996-03-21
US5619923A (en) 1997-04-15

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