EP0953532A2 - Dispositif pour éviter la salissure pendant le transport d'un bande imprimée - Google Patents

Dispositif pour éviter la salissure pendant le transport d'un bande imprimée Download PDF

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Publication number
EP0953532A2
EP0953532A2 EP99106142A EP99106142A EP0953532A2 EP 0953532 A2 EP0953532 A2 EP 0953532A2 EP 99106142 A EP99106142 A EP 99106142A EP 99106142 A EP99106142 A EP 99106142A EP 0953532 A2 EP0953532 A2 EP 0953532A2
Authority
EP
European Patent Office
Prior art keywords
web
former
chamber
cooling
cooled
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Withdrawn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
EP99106142A
Other languages
German (de)
English (en)
Other versions
EP0953532A3 (fr
Inventor
Robert Richard Murray
John Sheridan Richards
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 EP0953532A2 publication Critical patent/EP0953532A2/fr
Publication of EP0953532A3 publication Critical patent/EP0953532A3/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Withdrawn legal-status Critical Current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
    • B65H45/22—Longitudinal folders, i.e. for folding moving sheet material parallel to the direction of movement
    • B65H45/221—Longitudinal folders, i.e. for folding moving sheet material parallel to the direction of movement incorporating folding triangles
    • B65H45/223—Details of folding triangles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0476—Cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/40—Temperature; Thermal conductivity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/20—Avoiding or preventing undesirable effects
    • B65H2601/25—Damages to handled material
    • B65H2601/251—Smearing

Definitions

  • the present invention relates to web-fed rotary printing presses, and more particularly a device for avoiding or reducing the lubrication of a printed web in the folder of the printing machine.
  • Lubrication of the ink printed on the web but not yet sufficiently dried is caused, for example, by processing components such as the turning bars, the former, the paddle wheel or other components of the folder, that is to say that ink is transferred to the components during the processing process or settles on it.
  • the present invention therefore provides for cooling the paint directly on the web, namely before or at a known lubrication position, so that the viscosity the color increases and thus smearing at this position is reduced.
  • This The printed web is cooled in addition to a first cooling of the web in one conventional cooling device.
  • the cooling is therefore immediately before the contact Track with the turning bars or other subordinate components of the Folders that can cause smearing are provided.
  • the viscosity of certain colors from which e.g. B. 85% of their solvent content removed to be increased by approximately 7% for each degree of temperature drop.
  • the severe heat loss of the web has the due to a cooling temperature difference over a short period of time and immediately before the contact of the web with a lubricating element is brought about great effect on the viscosity of the paint.
  • the ink achieves a significant reduction in smearing.
  • Fig. 1 shows the former and folding area of the folder of a printing press, such as this is generally known from the prior art.
  • a path 20 moves from the upstream components of the printing press (not shown), e.g. B. the Feed roller, the printing units, the dryer or the cooling device, to one in a frame 40 mounted roller 30.
  • the web 20 runs over the surface of the Roller 30 at approximately the same speed that it passes through the Printing press is running. After the path over part of the curvature of the Has moved roller 30, it goes out of contact with the roller 30 and moves via a folding former 50 located under the roller 30.
  • the former 50 has a triangular shape, the top dimension (i.e. the dimension) along the roller 30) is approximately equal to the length of the roller 30 and is therefore sufficient to to receive the web 20 in its full width on the surface of the former 50.
  • the former 50 is e.g. B. arranged such that its surface from the roller 30th runs obliquely downwards and forms an angle ⁇ with the frame 40.
  • the top 51 the triangular surface of the former 53 points downward and away from the roller 30, for example, approximately in the middle of the roll width, as clearly shown in FIG. 2 can be seen.
  • the path of the web (20) is significantly changed by the Funnel rollers 70a, which are arranged directly below the folding former 50 and are essentially on a plane parallel to one another and perpendicular to the roller 30 are located. These hopper rollers 70a are not driven and are adjustable to to compensate for different paper. Due to the frictional contact, the Hopper rollers 70a cause smearing.
  • the web 20 is e.g. B. from a pair of press rolls 70 over the Folding former 50 downward and by one formed between the former rollers 70a Gap 70b drawn.
  • the press rolls 70 are a pair of rolls that are parallel to each other are arranged and their axes are substantially perpendicular to the axis of the roller 30 run.
  • the web 20 is lengthwise cut in half by the pair of press rolls 70 folded, which is due to the triangular shape of the former and the former rollers 70a in the way is favored that when the web 20 enters the gap between the Press rolls 70 these are substantially perpendicular to the plane in which they move, when it reaches the former 55, is folded.
  • the web 20 While the web 20 is pulled over the former 50, folded and then through the When the former rollers 70a are pulled, the web can be pressed onto the former 50 and thus touch the surface and the edges of the former 50.
  • the web can touch the former in particular at its tip 51, when drawn over the former 50 and then through the former rollers 70a.
  • the contact with the former 55 and the relative movement of the web 20 over it, can cause paint smear and smear marks on the web 20 what with heat generated by friction, which increases the temperature and the viscosity of the Color lowers, is connected.
  • the web 20 z. B. not here shown turning bars come into contact; and if the color on the web 20 is not sufficiently dry, the paint can smear on the web, because the rub the printed surfaces of the web against the turning bars.
  • the roller 30 has an associated cooling unit for the Cool the roller so as to increase the viscosity of the ink while the web is over the former 50, which is considered a known lubrication position, runs.
  • Fig. 2 shows a front view of the former 53 of Fig. 1.
  • the upper edge 52 near the Roller 30 extends and its tip 51 forms the lower end of the former 50.
  • the Hopper rolls 70a between which the web is drawn after it has been moved over the former 50, are below the former 50.
  • Die Hopper rollers 70a are substantially perpendicular to roller 30 (which is also called Hopper inlet roller is known) arranged. While the web 20 over the As the tip 51 of the former 53 moves, a fold becomes approximately in the middle of the web 20 formed and the web 20 is pressed by the press rolls 70 between the hopper rolls 70a drawn.
  • FIG. 3 shows an embodiment of the invention for reducing ink smear from the web in which the viscosity of the ink on the web is increased during further processing of the web 20.
  • the rollers present in the area of the former are cooled by a controlled coolant flow.
  • the former feed roller 30 at the top of the former and an adjacent cooling roller 31 are cooled with a liquid or gas that is circulated through both rollers 30 and 31 from a coolant source, not shown.
  • the coolant can e.g. B. water, NH 3 , CO 2 , N 2 or compressed air, which is pumped through a cooling and / or pumping system through the rollers 30, 31.
  • a press roll 35 can also be cooled.
  • Figure 3A shows a coolant flow control system 32 that shows the amount of circulated Coolant regulated, based on the temperature change of the Rollers 30, 31 guided coolant and the temperature of the from the rollers 30, 31st returning coolant.
  • the flow control system 32 may include a coolant certain flow rate and a certain temperature Guide the funnel inlet roller 30 in order to achieve a temperature drop in the paper web, whose temperature z. B. 32 ° C (90 ° F).
  • the one emerging from the hopper inlet roller 30 Coolant can then, for. B. have a temperature of 12 ° C (53 ° F).
  • 3A shows the coolant control system 32 for the roller 30 when the coolant Is water.
  • Water with a temperature of, for example, 10 ° C (50 ° F) flows from a main source through line 132 and through check valve 133 and is then passed through a flow control pump 134 to an inlet 136.
  • the water temperature is measured by a temperature sensor 138.
  • the water passes roller 30 and exits outlet 140 where the water temperature passes through an outlet temperature sensor 142 is measured again. If the Temperature difference of the water between the outlet 140 and the inlet 136 one exceeds a certain value, for example by 1.6 ° C (3.0 ° F), then opens temperature controlled valve 144 and the heated water becomes the main source returned, which is cooled and kept at a constant temperature.
  • the temperature controlled valve 144 may remain closed or only partially be opened so that at least part of the exiting from the outlet 140 Water flows back through the pump 134.
  • the flow rate of water through the pump 134 be increased to achieve a greater cooling effect. (It should be noted that then the temperature controlled valve 144 is fully open so that the water taken in from the main source). If the temperature difference is only 1.6 ° C (3.0 ° F) or is less, the flow rate of water through the pump 134 be stabilized or reduced. In this way, a desired one Temperature difference between the water temperatures at the inlet and at the outlet set become. It is also possible to control the flow rate of water through the pump 134 additionally on the basis of the web speed or the temperature of the color and not only to control based on the water temperature difference.
  • a Microprocessor 148 can control both pump 134 and temperature Control valve 144.
  • the funnel inlet roller 30 and the cooling roller 31 can, for. B. of the same construction as described in US 4,805,690, which is incorporated herein by reference.
  • a simple cooling cycle with a heat exchange condenser can be used to regulate the temperature in the roller 30.
  • the rollers 31 and 35 can be cooled in the same way as the roller 30.
  • Figure 3 also shows the ink cooling immediately at the lubrication position Wrapping the web at the lubrication positions.
  • Chamber 80 prepares a largely closed system around the web 20 and the former 50.
  • Chamber 80 in which there is a regulated environment, is in communication with the coolant flow control system 32 described above; she is with Openings 146 for the inlet and outlet lines in and out of the various cooled rollers.
  • the reduced humidity in this way can advantageously the formation of condensation on the cold surfaces of the Reduce rollers 30, 31, 35.
  • chamber 80 has an entry slot 81 for entry the web 20 into the chamber 80 and an exit slot 82 for the exit of the folded web 20 from the chamber 80 after it has passed over the former 50 has moved.
  • the chamber 80 also has a feed opening 85 with which one Feed line 86 can be connected. Through the feed line 86 z.
  • B. dry air with 20% relative humidity and a dew point temperature of 4 ° C (40 ° F) fed.
  • a continuous stream of cooled flows through the feed line 86 Air into the chamber 80 and also flows continuously through the inlet slot 81 and the exit slot 82 through the chamber 80.
  • FIG. 4 shows a modified folding former 50 according to the present invention, which is provided with openings 90 along its center.
  • the openings 90 extend from the lower surface (on the side facing away from the web) to the upper surface (on the side facing the web) of the former 50.
  • a manifold 92 near the lower surface of the former 50 is in fluid communication with the openings 90
  • a gas e.g. B. air, N 2 or CO 2 with a certain temperature and a certain pressure, for. B. -1 ° C (30 ° F) and 0.2 Torr.
  • the gas can thus enter the distribution line 92, flow through the openings or nozzles 90 and come into contact with the web running over the former 50.
  • the flow of the gas cools the web 20 and hence the color printed thereon.
  • the gas has the further advantage that it forms a cushion for the web 20 on which the web moves without contacting the former 50, which further reduces lubrication.
  • the The former 50 is constructed as a framework, so that the upper edge 52 and the Side edges (see Fig. 1) are frame parts and there is no upper surface of the Folding former 50 there, the openings 90 are formed in a line piece which on the Machine frame or the upper edge 52 of the former 50 is attached. Through the Openings 90 of the line piece advantageously exits cooling gas which is also the approach of the tip 51 of the former to the web center.
  • the Folder 50 include side manifolds 93 extending along it Extend outer edges. Openings 94 are provided in the lateral distribution lines 93 molded onto the top surface of the former 53 and / or onto the side edges of the former 53 are directed as shown in FIG. 4. The cooled gas is in the lateral distribution lines 93 passed, flows through the openings 94 and makes contact web 20 to help cool the ink on web 20.
  • FIG. 4 Another alternative for the supply of cooling gas is to attach a or several manifolds or gas tubes 95 under the former 50 and behind the hopper rollers 70 as shown in FIG. 4.
  • the gas tubes 95 located on one side of the folded web are arranged downstream of the former 50 and its tip 51, are provided with nozzles 96 which coat the outer surface of the web 20 with cooling gas, as the web 20 moves to the next lubrication position.
  • Gas tubes 95 are shown in a vertical orientation, it is also conceivable that these are mounted on a support 97 and are rotatable at an angle about the support 97.
  • the supports 97 are also movable on a mounting rod 98, so that the Gas tubes 95 can be positioned so that the paint can be cooled where this is necessary.
  • more than two gas tubes 95 can be provided and a set of gas tubes on each side of the folded web can be assigned, and that the cooling gas through the mounting rod 98 to the Gas nozzles 96 can be passed.
  • the length of the pipe and the volume, the temperature and the type of flowing gas are decisive to control the degree of cooling of the paint and determine how low the temperature will be.
  • By placing the Distribution line or the gas tube is determined where the printed strip with the low-temperature and consequently high-viscosity paint will be on the web.
  • Under Use of the adjustable supports 97 on the rod 98 can be the desired one cooling printed track on the caused by the press rolls 70 problematic lubrication points are aligned.
  • gas tubes can be substantially parallel to the surface of the Folder 50 may be arranged to cool the cooling former 50 along its fold Length extending from the hopper feed roller 30 to the hopper tip 51, feed.
  • Fig. 5 shows a third embodiment of the present invention, in which one Number of processing units downstream of the printing units in a regulated, cooled environment are included so that heat is removed from the web 20 to to increase the viscosity of the paint on the web.
  • the cooling gas e.g. B. cooled air
  • the cooling gas is with a certain inlet temperature and humidity, z. B. at 13 ° C. (55 ° F) and a relative humidity of 40%, in a large chamber 100 initiated to create a favorable atmosphere for extracting heat and moisture to create from the web 20.
  • the cooling chamber 100 creates a closed environment around the web and the Components of the printing press with which the web 20 comes into contact.
  • the Cooling chamber 100 can e.g. B. a cooling unit 109, a former, turning bars 107 and a folder 106.
  • the web 20 passes into the chamber 100 a web inlet 101, which is oriented so that the web 20 from the preceding processing unit, such as the dryer (not shown), to a first Processing unit within chamber 100, e.g. B. a cooling unit (not shown) transforms.
  • the chamber 100 has a web outlet 102 so that the Web from the last processing unit within chamber 100, e.g. B. one Folding device, passes to a processing unit outside the chamber 100, without interrupting the movement of the web.
  • the chamber 100 has e.g. B. at least one and possibly several inlets 103 through which the cooling gas flows into the chamber 100.
  • the gas is discharged from the chamber 100 and into the room through outlet openings 105 or, if desired, is returned to the cooling system. Sufficient gas is supplied to the outlet temperature z. B. to about 14 ° C (58 ° F).
  • the outlet openings 105 can open into drain lines 108 via standard pipe connections known in the prior art.
  • Reduced temperature and humidity can reduce the viscosity of the ink on the Lane 20 can be increased, which in turn increases the likelihood of smearing paint reduced on the web 20.
  • the lowered temperatures help heat that due to friction when the web running over the machine components comes into contact arises, as well as latent heat present in the web and in the color, which, for. B. in an upstream cooling unit could not be completely eliminated remove.
  • Embodiments is limited. Alternative embodiments are conceivable, e.g. B. Combinations of those described above that determine the temperature of the Machine components and the atmosphere surrounding the components after a lower the first cooling of the web in order to reduce the Smearing paint to cool the web and the paint printed on it and the Further increase the viscosity of the paint.
  • the lubrication positions can be turning bars, Bucket wheel tips of the folder, guide rollers and. elements.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Rotary Presses (AREA)
EP99106142A 1998-05-01 1999-04-06 Dispositif pour éviter la salissure pendant le transport d'un bande imprimée Withdrawn EP0953532A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/071,515 US5947026A (en) 1998-05-01 1998-05-01 Apparatus for reducing downstream marking including folder marking
US71515 1998-05-01

Publications (2)

Publication Number Publication Date
EP0953532A2 true EP0953532A2 (fr) 1999-11-03
EP0953532A3 EP0953532A3 (fr) 2000-03-22

Family

ID=22101824

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99106142A Withdrawn EP0953532A3 (fr) 1998-05-01 1999-04-06 Dispositif pour éviter la salissure pendant le transport d'un bande imprimée

Country Status (4)

Country Link
US (1) US5947026A (fr)
EP (1) EP0953532A3 (fr)
JP (1) JPH11334038A (fr)
DE (1) DE19915386A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19802739A1 (de) * 1998-01-26 1999-07-29 Roland Man Druckmasch Kühlvorrichtung in einem Falzaufbau und Kühlverfahren
DE10031814A1 (de) * 2000-06-30 2002-01-10 Heidelberger Druckmasch Ag Einrichtung zum berührungsfreien Führen eines Bahnmaterials über eine Fläche
WO2004037697A2 (fr) * 2002-10-19 2004-05-06 Koenig & Bauer Aktiengesellschaft Appareil de pliage
US9382087B2 (en) * 2004-11-03 2016-07-05 Goss International Americas, Inc. Compressible nip rolls for multiribbon transport
US20140352561A1 (en) * 2013-05-31 2014-12-04 Joe I.V. Rosenberg Process and apparatus for conversion of a coldset web printing press to a hybrid heatset and coldset printing press

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH232910A (de) * 1942-03-16 1944-06-30 Broschek & Co Buchdruckerei Un Verfahren und Vorrichtung zum Vermeiden des Übertragens der Farbe gedruckter Bahnen oder Bogen auf Flächen, mit denen sie beim Druck während ihrer Förderung in Berührung kommen.
US3312126A (en) * 1964-06-10 1967-04-04 Offen & Co Inc B Adjustable speed drive
JPH03124446A (ja) * 1989-10-06 1991-05-28 Kondo Unyu Kiko Kk プリント紙のブロッキング防止装置
US5108022A (en) * 1988-05-18 1992-04-28 Man Roland Druckmaschinen Ag Universal web turning system, particularly for printed webs derived from a rotary web-type printing machine
EP0747310A2 (fr) * 1995-06-05 1996-12-11 Heidelberger Druckmaschinen Aktiengesellschaft Corps cylindrique tournant avec faible inertie de masse
DE19802739A1 (de) * 1998-01-26 1999-07-29 Roland Man Druckmasch Kühlvorrichtung in einem Falzaufbau und Kühlverfahren

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
GB1489593A (en) * 1975-08-11 1977-10-19 Ici Ltd Pattern printing apparatus
JPS60161152A (ja) * 1984-01-26 1985-08-22 Toppan Printing Co Ltd 冷却装置
JPS62191152A (ja) * 1986-02-18 1987-08-21 Mitsubishi Heavy Ind Ltd 水無し平版印刷機
US4774771A (en) * 1987-03-20 1988-10-04 Littleton Industrial Consultants, Inc. Self cleaning chill roll apparatus
DK167994B1 (da) * 1989-06-27 1994-01-17 Poul Schack Petersen Fremgangsmaade og trykkemaskine til udfoerelse af flerfarvet tekstiltryk
DE4108883A1 (de) * 1991-03-19 1992-09-24 Sengewald Karl H Gmbh Druckvorrichtung
US5189960A (en) * 1991-11-18 1993-03-02 Fredric Valentini Apparatus and method for controlling temperature of printing plate on cylinder in rotary press
DE4413731C2 (de) * 1994-04-20 1998-07-02 Heidelberger Druckmasch Ag Verfahren zur Steuerung der Temperatur der Druckfarbe in einer Druckmaschine
US5571564A (en) * 1995-03-20 1996-11-05 Advance Systems, Inc. Apparatus and method for preventing ink resoftening on a printed web as the web travels over a chill roll

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH232910A (de) * 1942-03-16 1944-06-30 Broschek & Co Buchdruckerei Un Verfahren und Vorrichtung zum Vermeiden des Übertragens der Farbe gedruckter Bahnen oder Bogen auf Flächen, mit denen sie beim Druck während ihrer Förderung in Berührung kommen.
US3312126A (en) * 1964-06-10 1967-04-04 Offen & Co Inc B Adjustable speed drive
US5108022A (en) * 1988-05-18 1992-04-28 Man Roland Druckmaschinen Ag Universal web turning system, particularly for printed webs derived from a rotary web-type printing machine
JPH03124446A (ja) * 1989-10-06 1991-05-28 Kondo Unyu Kiko Kk プリント紙のブロッキング防止装置
EP0747310A2 (fr) * 1995-06-05 1996-12-11 Heidelberger Druckmaschinen Aktiengesellschaft Corps cylindrique tournant avec faible inertie de masse
DE19802739A1 (de) * 1998-01-26 1999-07-29 Roland Man Druckmasch Kühlvorrichtung in einem Falzaufbau und Kühlverfahren

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 015, no. 325 (M-1148), 19. August 1991 (1991-08-19) & JP 03 124446 A (KONDO UNYU KIKO KK), 28. Mai 1991 (1991-05-28) *

Also Published As

Publication number Publication date
JPH11334038A (ja) 1999-12-07
EP0953532A3 (fr) 2000-03-22
US5947026A (en) 1999-09-07
DE19915386A1 (de) 1999-11-04

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