EP1078738A1 - Offset Bogendruckmaschine - Google Patents

Offset Bogendruckmaschine Download PDF

Info

Publication number
EP1078738A1
EP1078738A1 EP00100180A EP00100180A EP1078738A1 EP 1078738 A1 EP1078738 A1 EP 1078738A1 EP 00100180 A EP00100180 A EP 00100180A EP 00100180 A EP00100180 A EP 00100180A EP 1078738 A1 EP1078738 A1 EP 1078738A1
Authority
EP
European Patent Office
Prior art keywords
paper
wall
impression cylinder
foreign matter
brush
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
EP00100180A
Other languages
English (en)
French (fr)
Other versions
EP1078738B1 (de
Inventor
Hiroshi Uzawa
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.)
Shinko Co Ltd
Original Assignee
Shinko Co Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=16684537&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1078738(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Shinko Co Ltd filed Critical Shinko Co Ltd
Publication of EP1078738A1 publication Critical patent/EP1078738A1/de
Application granted granted Critical
Publication of EP1078738B1 publication Critical patent/EP1078738B1/de
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
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/002—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing cleaning devices for sheets or webs

Definitions

  • This invention relates to a sheet-fed offset printing machine.
  • paper 1 sent out of a feeding device (not shown in Figures) is held by a holding device 21 of a clamp arm 2 and fed to an impression cylinder 3. Then, the paper 1 is re-held by another holding device 31 on the impression cylinder 3, inserted between the impression cylinder 3 and a blanket cylinder 4 for printing.
  • An air nozzle 41 and a brush 42 for holding the paper are disposed right above the impression cylinder 3.
  • the paper 1 transferred by the impression cylinder 3 is prevented from flapping by high-pressurized air.
  • the brush 42 removes foreign matter such as paper powder adhering to the surface of the paper 1 and holds the paper 1 to insert certainly between the blanket cylinder 4 and the impression cylinder 3.
  • 43 is an air pipe for supplying compressed air to the air nozzle 41
  • 44 is a supporting member for attachment of the brush 42 to the apparatus main body.
  • the foreign matter caught by the brush 42 may adhere to the paper 1, an apparatus for cleaning the brush 42 (a brush cleaner), which makes the construction complicated and the whole apparatus large, is necessary, and dust-removing ability is insufficient.
  • the high-pressurized air blown to the paper 1 may put floating foreign matter onto or into the paper 1.
  • the foreign matter causes degeneration of the accuracy and clearness of the printing.
  • the foreign matter may adhere to the blanket cylinder 4 for printing and reduce the accuracy and clearness of the printing further. To prevent this, the blanket cylinder 4 must be washed several times a month, and this causes much labor.
  • FIG. 1 is a construction view of a principal portion showing a preferred embodiment of the sheet-fed offset printing machine of the present invention
  • Figure 2 is an enlarged cross-sectional view of a principal portion.
  • 1 is paper (a sheet) sent out of a feeding machine not shown in Figures and fed in an direction of an arrow A
  • 2 is a clamp arm, of which end portion is provided with a holding device 21 for holding a forth end of the paper 1, driven rotationally clockwise as shown in Figure 1
  • 3 is an impression cylinder on which a holding device 31 is disposed for, succeeding the holding device 21, re-holding the forth end of the paper 1 held and fed by the clamp arm 2.
  • the rotating brush 5 is disposed between the blanket cylinder 4 and the clamp arm 2, freely closed to and part from the impression cylinder 3, and rotated by a driving device not shown in Figures at about 1600 to 3000rpm.
  • the rotating brush 5 is having a width dimension same as or slightly larger than the width of the paper 1, extending in a vertical direction to the surface of Figure 1, and stored in a case 11.
  • the material of the bristle of the brush 5 for example, polyamide resin (nylon, etc.), acrylate resin, metal, conductive fiber, etc. are preferable.
  • the holding device 31 outsizes the impression cylinder 3 for 5 to 6mm, contacts the rotating brush 5 in every rotation of the impression cylinder 3, and gives vibration to the rotating brush 5 and all parts connected to the rotating brush 5.
  • Bristle size (length of the bristle) of the brush 5 is preferably (set to be long enough) 15mm to 20mm to absorb the vibration.
  • the case 11 is provided with an upstream wall 6 and a downstream wall 7, of which end edges approach the above impression cylinder, to shield an upstream side and a downstream side of the rotation brush 5, and an inside wall portion 8 to tightly seal the upstream wall 6 and the downstream wall 7.
  • Lower portions of the upstream wall 6 and the downstream wall 7 are bent toward inside, and lower bent portions 61 and 71 are formed approximately as to surround a lower portion of the rotation brush 5 from the both sides.
  • upper portions of the upstream wall 6 and the downstream wall 7 are also bent toward inside to form upper bent portions 62 and 72, and upper space in the case 11 is narrowed upward by the upper bent portions 62 and 72.
  • a vacuum duct 12 is attached to an upper portion of the inside wall portion 8
  • a vacuum passage 9 formed in the vacuum duct 12 is connected to the suction slit 10 formed on the inside wall portion 8 of the case 11.
  • a pipe 13 connected to the vacuum passage 9 for vacuumization is attached to the vacuum duct 12 and connected to a suction device provided with a vacuum pump not shown in Figures.
  • Current velocity V of the air passing through suction openings 14 formed between the lower bent portions 61 and 71 of the upstream wall 6 and the downstream wall 7 and the paper 1, may be set corresponding to operational conditions, is preferably set to be about 50 to 60m/sec.
  • suction effect of the foreign matter R becomes remarkable, and the foreign matter R, once sucked off the paper 1, is certainly sucked into the vacuum passage 9 without falling off the brush and discharged to the outside from the suction device through the pipe 13.
  • the velocity is less than 50m/sec, the foreign matter R once swept by the rotation brush 5 may drop out of the case 11.
  • the velocity over 60m/sec does not improve the foreign matter removing effect much.
  • Rotational frequency of the rotation brush 5 is, for example, preferably set to be about 1600 to 3000rpm. With this frequency, the foreign matter R adhering to the paper 1 can be effectively removed, and the paper 1 is prevented from being damaged. If the rotational frequency is less than 1600rpm, the foreign matter R firmly adhering to the paper 1 can not be removed. And, the rotational frequency over 3000rpm may cause flaws on the surface of the paper 1.
  • the vacuum duct 12, the pipe 13, and the case 11 are unified and supported by a supporting device 15 on the main body of the machine (not shown in Figures) as to be movable approximately in a vertical direction.
  • the supporting device 15 is composed of an attachment member 151 attached to the main body of the machine with bolts, a cylinder 152 fixed to the attachment member 151, a piston rod 153, and an arm 154 attached to an end portion of the piston rod 153.
  • the vacuum duct 12 and the pipe 13 are fixed to an end portion of the arm 154, and the rotation brush 5 is moved as to close to and part from the impression cylinder 3 by extension and contraction of the cylinder 152.
  • the rotating brush 5 is always kept cleaned because the foreign matter R caught by the rotating brush 5 is sucked into the suction slit 10. Therefore, the device for cleaning the rotating brush 5 is unnecessary. As described above, the foreign matter R is efficiently removed without causing flaws on the surface of the paper 1 by sweeping function of the rotating brush 5 with vacuumization.
  • the paper 1 is prevented from raising and flapping, and transferred in tight contact with the impression cylinder 3 because the paper 1 is pressed to the surface of the impression cylinder 3 by elasticity of the bristle 51 of the rotation brush 5. Therefore, the paper 1 is certainly inserted between the blanket cylinder 4 for printing and the impression cylinder 3, and a clear image of high accuracy is printed on the paper 1 without blur and bleeding. That is to say, conventional prevention of flapping by the air nozzle 41 and paper holding and removing the foreign matter by the brush 42 are conducted together by the one rotating brush 5 with vacuumization, and the foreign matter R is removed far more efficiently than the conventional printing machine.
  • the whole apparatus can be formed far more compact than the conventional machine because the rotating brush 5 is stored in the compact case 11.
  • a nozzle is attached right below a vacuum passage, and an end portion of the nozzle is disposed close to a rotating brush.
  • height dimension of the apparatus is greatly diminished and remarkable compactification can be achieved because the nozzle is omitted and the end portion of the rotating brush 5 is closed directly to the suction slit 10 of the vacuum duct 12.
  • Figure 3 shows another embodiment.
  • the downstream wall 7 (and the upstream wall 6) is bent plural times (twice) as to form lower bent portions 71a and 71b (61a and 61b) gradually approach the lower peripheral portion of the rotating brush 5. That is to say, minimum opening dimensions T 1 , T 2 , and T 3 gradually diminish toward the suction opening 14 side.
  • the upstream wall 6, not shown in Figure 3 is constructed to be symmetric to the downstream wall 7.
  • the minimum opening dimension T 1 may be set to have different values between the upstream wall 6 and the downstream wall 7.
  • the minimum opening dimension T 1 on the downstream wall 7 may be smaller than that on the upstream wall 6 to make the suction effect high and volume on a sucking-up side of the foreign matter R (the upstream side) large to effectively deal with a case that the adhesion of the foreign matter R is relatively excessive.
  • the upper parts of the upstream wall 6 and the downstream wall 7 may be attached to the inside wall portion 8 with hinges or bolts as to be position-adjustable for arranging appropriately the interval between the upstream wall 6 and the downstream wall 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Rotary Presses (AREA)
EP20000100180 1999-07-30 2000-01-12 Offset Bogendruckmaschine Expired - Lifetime EP1078738B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP21617999 1999-07-30
JP21617999A JP3215094B2 (ja) 1999-07-30 1999-07-30 枚葉オフセット印刷機

Publications (2)

Publication Number Publication Date
EP1078738A1 true EP1078738A1 (de) 2001-02-28
EP1078738B1 EP1078738B1 (de) 2003-09-24

Family

ID=16684537

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000100180 Expired - Lifetime EP1078738B1 (de) 1999-07-30 2000-01-12 Offset Bogendruckmaschine

Country Status (3)

Country Link
EP (1) EP1078738B1 (de)
JP (1) JP3215094B2 (de)
DE (1) DE60005448T2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10206890B4 (de) * 2001-03-13 2009-11-19 Heidelberger Druckmaschinen Ag Druckwerk mit einer Vorrichtung zum Entsorgen von Partikeln
DE102011088706A1 (de) * 2011-12-15 2013-06-20 Koenig & Bauer Aktiengesellschaft Trockenreinigungseinrichtung für Bedruckmaterial
CN112078241A (zh) * 2020-07-29 2020-12-15 段杜娟 一种印刷设备的环保吸尘机构

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009279819A (ja) * 2008-05-21 2009-12-03 Akiyama International Kk 両面刷枚葉印刷機の紙粉除去装置
JP6120128B2 (ja) * 2012-11-01 2017-04-26 ホログラム・ワークス株式会社 異物除去方法及び、これに用いる基体シート上の異物除去装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986223A (en) * 1973-05-21 1976-10-19 Herbert Products, Inc. Surface cleaning device
EP0909592A2 (de) * 1997-10-17 1999-04-21 Peter Kist Verfahren zur elektrostatischen Oberflächenentladung und Entstaubung von Werkstücken und Vorrichtung zur Durchführung des Verfahrens
DE19903887A1 (de) * 1998-02-23 1999-08-26 Heidelberger Druckmasch Ag Verfahren und Bogenrotationsdruckmaschine zum Beidseitigen Bedrucken eines Bedruckstoffbogens

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986223A (en) * 1973-05-21 1976-10-19 Herbert Products, Inc. Surface cleaning device
EP0909592A2 (de) * 1997-10-17 1999-04-21 Peter Kist Verfahren zur elektrostatischen Oberflächenentladung und Entstaubung von Werkstücken und Vorrichtung zur Durchführung des Verfahrens
DE19903887A1 (de) * 1998-02-23 1999-08-26 Heidelberger Druckmasch Ag Verfahren und Bogenrotationsdruckmaschine zum Beidseitigen Bedrucken eines Bedruckstoffbogens

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Bogen und Bahnreinigung", PAPIR + KUNSTSTOFFVERARBEITER, vol. 26, no. 1, January 1991 (1991-01-01), Frankfurt am Main, pages 44, XP000201092 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10206890B4 (de) * 2001-03-13 2009-11-19 Heidelberger Druckmaschinen Ag Druckwerk mit einer Vorrichtung zum Entsorgen von Partikeln
DE102011088706A1 (de) * 2011-12-15 2013-06-20 Koenig & Bauer Aktiengesellschaft Trockenreinigungseinrichtung für Bedruckmaterial
CN112078241A (zh) * 2020-07-29 2020-12-15 段杜娟 一种印刷设备的环保吸尘机构

Also Published As

Publication number Publication date
EP1078738B1 (de) 2003-09-24
DE60005448D1 (de) 2003-10-30
JP3215094B2 (ja) 2001-10-02
DE60005448T2 (de) 2004-07-01
JP2001038879A (ja) 2001-02-13

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