EP0292645B1 - Anti-wrap up device for web fed printing presses - Google Patents

Anti-wrap up device for web fed printing presses Download PDF

Info

Publication number
EP0292645B1
EP0292645B1 EP19880102365 EP88102365A EP0292645B1 EP 0292645 B1 EP0292645 B1 EP 0292645B1 EP 19880102365 EP19880102365 EP 19880102365 EP 88102365 A EP88102365 A EP 88102365A EP 0292645 B1 EP0292645 B1 EP 0292645B1
Authority
EP
European Patent Office
Prior art keywords
web
press
rotational inertia
rollers
wrap
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.)
Expired - Lifetime
Application number
EP19880102365
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0292645A3 (en
EP0292645A2 (en
Inventor
Frank A. Balow
Edward Enstrom
Eugene Skipor, Jr.
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.)
Goss International LLC
Original Assignee
Rockwell International Corp
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 Rockwell International Corp filed Critical Rockwell International Corp
Publication of EP0292645A2 publication Critical patent/EP0292645A2/en
Publication of EP0292645A3 publication Critical patent/EP0292645A3/en
Application granted granted Critical
Publication of EP0292645B1 publication Critical patent/EP0292645B1/en
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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/20—Safety devices preventing damage

Definitions

  • This invention relates to an apparatus for protecting the printing unit of a web fed printing press, usually the printing cylinders, against damage that can be caused by paper wrapping around on the blanket cylinder when there is a break in the web after it has left the printing unit.
  • the apparatus comprises free turning rotational inertia means that cooperate in gripping the web between them and which are driven by the web so that they continue to draw the web forwardly when there is a web break downstream of the apparatus.
  • a pair of wheels axially spaced from each other are associated with a paper deflection roller.
  • Each of the wheels is mounted for free rotation in the sense of normal web travel by means of a free-wheeling device.
  • Each wheel has a rubber ring on its periphery which engages the web by gravity and spring force.
  • the paper deflection roller has a smooth cylindrical surface and engages the opposite, lower side of the web.
  • the present invention proceeds from the prior art represented by DE-A-1 911 297 and provides an apparatus for protecting the units of a web fed press from damage in the event of a web breake after it leaves the press, the apparatus comprising: a frame; free turning rotational inertia means including means journaled in the frame for rotation in cooperative opposition with respect to each other and in constant contact with the traveling web to be driven thereby so that the web will continue to be removed from the press by the inertia means in the event of a web breake downstream therefrom; and circular gripping means mounted on the rotational inertia means for contact with the traveling web.
  • the apparatus is characterized in that the rotational inertia means comprise a pair of similar rollers having their axis aligned in a vertical plane, the web being contacted by opposed pairs of the circular gripping means on the rollers and passing horizontally therebetween, and in that means are provided whereby the circular gripping means can be adjusted laterally along the axis of rotation of each roller for positioning in the margins between printed columns.
  • a horizontally disposed traveling web 10 that passes between a pair of free turning rotational inertia means 11 and 12, hereshown as a pair of opposed rollers.
  • rollers are shown here as one embodiment it should be pointed out that any other inertial gripping means such as trolleys or wheels etc. may be used.
  • the inertia means be in constant contact with traveling web 10 and be of sufficient mass as to provide continued rotation and contact with the web in the event of a web break downstream from the gripping apparatus.
  • rollers or inertia means 11 and 12 are shown as being journaled in frame 15 by means of stub shafts 16 and 17 that are disposed within bearings 18 and 19 respectively.
  • a throw out mechanism 20 is provided for moving the upper roll 11 toward and away from the lower roll 12 to provide for disengagement when desired.
  • the apparatus of this invention provides gripper means 25 which take the form of rings that are disposed about the periphery of the inertia means 11 and 12.
  • the gripping rings 25 may be secured to the rolls 11 and 12 by means of set screws or other fastening means so that they may be loosened and adjusted laterally along the length of the axis of the rollers 11 and 12. This is done in order that the rings can be placed in the non-printed areas which exist between printed columns on the web. In this manner the possibility of smearing or smudging or otherwise disturbing the freshly printed matter is eliminated.
  • the throw out mechanism is used to move the roll 11 away from roll 12 as the web 10 is threaded through and on into subsequent processing apparatus such as a dryer or the like.
  • the throw out mechanism then lowers the roll 11 into contact with the web as illustrated in Figure 2 and the printing operation is initiated. It is obvious that as the web is drawn between the inertia means or rollers 11 and 12, it causes the rollers to rotate at exactly the same speed as the traveling web. In the event of a web break after the capturing or anti-wrap up device the inertial movement of the two opposing inertia means 11 and 12 will continue to draw web through the nip between them and prevent any wrap up about the printing rolls in the last printing unit.
  • This device then does not require a signal to activate its capturing function, since the inertia of the device wants to continue to rotate even if the web is broken and wants to go slack. Therefore, it does not experience a delay and keeps the web in tension back to the printing unit. The loose end of the web is then accumulated past the anti-wrap up device (in a location that will not cause damage and is easy to clean).

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
EP19880102365 1987-05-27 1988-02-18 Anti-wrap up device for web fed printing presses Expired - Lifetime EP0292645B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US5469987A 1987-05-27 1987-05-27
US54699 1987-05-27

Publications (3)

Publication Number Publication Date
EP0292645A2 EP0292645A2 (en) 1988-11-30
EP0292645A3 EP0292645A3 (en) 1990-03-07
EP0292645B1 true EP0292645B1 (en) 1993-06-16

Family

ID=21992919

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880102365 Expired - Lifetime EP0292645B1 (en) 1987-05-27 1988-02-18 Anti-wrap up device for web fed printing presses

Country Status (5)

Country Link
EP (1) EP0292645B1 (ja)
JP (1) JP2825491B2 (ja)
AU (1) AU600554B2 (ja)
CA (1) CA1307162C (ja)
DE (2) DE3881761T2 (ja)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4201481A1 (de) * 1992-01-21 1993-07-22 Heidelberger Druckmasch Ag Einrichtung zur handhabung von materialbahnen in verarbeitungsmaschinen
US5398610A (en) * 1993-03-25 1995-03-21 Baldwin Web Controls Anti-wrap device for a web press
US5678484A (en) * 1993-03-25 1997-10-21 Baldwin Web Controls Anti-wrap device for a web press
US6298782B1 (en) 1993-03-25 2001-10-09 Baldwin Web Controls Anti-wrap device for a web press
DE19518502C2 (de) * 1995-05-19 1997-10-02 Wifag Maschf Rückhaltevorrichtung für eine in einer Rollenrotationsdruckmaschine laufende Bahn
DE19645799A1 (de) * 1996-11-07 1998-05-20 Roland Man Druckmasch Papierbahnfangvorrichtung
DE102004014777B4 (de) * 2004-03-26 2014-04-10 Baldwin Germany Gmbh Bahnfangvorrichtung einer Rollenrotations-Druckmaschine
CN106965539A (zh) * 2017-04-21 2017-07-21 东莞市长和兴印刷机械有限公司 一种印刷机的打裂线装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE628879C (de) * 1934-06-02 1936-04-18 Fallert & Co A G Papierbahnfuehrung
DE941127C (de) * 1953-04-18 1956-04-05 Hinniger Automatic Druckmasch Zugwalzenanordnung an einer Druckmaschine fuer veraenderliche Formate
DE1911297A1 (de) * 1969-03-06 1970-09-24 Albert Schnellpressen Vorrichtung an Rotationsdruckmaschinen zum Festhalten der Papierbahn
JPS5018562U (ja) * 1973-06-14 1975-03-01
DE3215473C2 (de) * 1982-04-24 1985-03-07 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum Verhindern von Druckwerksschäden bei Druckträgerbahnrissen
JPS6112342A (ja) * 1984-06-29 1986-01-20 Toppan Printing Co Ltd 印刷物検査装置

Also Published As

Publication number Publication date
AU1206888A (en) 1988-12-01
DE3881761T2 (de) 1993-11-11
AU600554B2 (en) 1990-08-16
JPS63306044A (ja) 1988-12-14
CA1307162C (en) 1992-09-08
EP0292645A3 (en) 1990-03-07
DE3881761D1 (de) 1993-07-22
EP0292645A2 (en) 1988-11-30
JP2825491B2 (ja) 1998-11-18
DE292645T1 (de) 1989-04-20

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