EP0316673B1 - Vorrichtung zum Spannen von Druckplatten - Google Patents

Vorrichtung zum Spannen von Druckplatten Download PDF

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Publication number
EP0316673B1
EP0316673B1 EP88118348A EP88118348A EP0316673B1 EP 0316673 B1 EP0316673 B1 EP 0316673B1 EP 88118348 A EP88118348 A EP 88118348A EP 88118348 A EP88118348 A EP 88118348A EP 0316673 B1 EP0316673 B1 EP 0316673B1
Authority
EP
European Patent Office
Prior art keywords
clamping
clamping bars
cylinder
bars
printing
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
EP88118348A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0316673A2 (de
EP0316673A3 (en
Inventor
Joachim Dorow
Gerhard Bleckmann
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of EP0316673A2 publication Critical patent/EP0316673A2/de
Publication of EP0316673A3 publication Critical patent/EP0316673A3/de
Application granted granted Critical
Publication of EP0316673B1 publication Critical patent/EP0316673B1/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
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1293—Devices for filling up the cylinder gap; Devices for removing the filler
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1218—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices
    • B41F27/1225—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly
    • B41F27/1231—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly by translatory motion substantially tangential to support surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1218—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices
    • B41F27/1225—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly
    • B41F27/1243—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly by pivotal or swivelling motion, e.g. by means of a rocking lever

Definitions

  • the invention relates to a device for tensioning printing plates for printing presses with two clamping bars arranged in a cylinder recess and under one end region of the tensioning plate to be tensioned, the outer contours of which, in the tensioned state, have a curvature corresponding to the cylinder curvature and which each have to be tensioned by a bent-over edge claw Pressure plate attacking pressure surface are limited, with an elastic hose is inserted between the pressure surfaces of the clamping bars and the clamping bars themselves, and wherein the clamping bars are adjustable in the clamping direction of the pressure plate by means of two eccentrics arranged in recesses.
  • the invention relates to a device for tensioning printing plates for printing presses with two clamping bars arranged laterally displaceably in a cylinder recess and under one end area of the tensioning plate to be tensioned, the outer contours of which, in the tensioned state, have a curvature corresponding to the cylinder curvature and which are each bent by a bent one Edge claw of the pressure surface engaging the pressure plate to be tensioned is limited, an elastic hose being inserted between the pressure surfaces of the tensioning bars and the tensioning bars themselves, and the tensioning bars being adjustable in the tensioning direction of the pressure plate by means of two eccentrics arranged in recesses.
  • Patent application P 36 16 425.9 describes a device for tensioning printing plates, in which the tensioning bars are moved by means of two hydraulic cylinders in order to tension the pressure plate on the cylinder.
  • a disadvantage of the known devices is that the production of the same is complex and therefore cost-intensive due to the narrowest manufacturing tolerances required. Despite the narrow manufacturing tolerances in the manufacture of the devices, an exact clamping of the printing plates is often not guaranteed, so that the clamped printing plates do not lie exactly on the surface of the printing cylinder, so that vibrations of the doctor blade occur during the printing process, which in turn adversely affects the quality of the printed products.
  • clamping bars are rotatably arranged around a roller arranged between the clamping bars during tensioning of the pressure plates.
  • the object is achieved in the second device in that the clamping bars can be pressed against a bar connected to the cylinder recess, provided with a T-shaped profile with rounded edges, during tensioning of the pressure plates, and wherein the tensioning bars on the bar facing side each have a truncated wedge-shaped groove.
  • the device according to FIGS. 1 and 2 essentially consists of the two clamping bars 2 arranged in a cylinder recess 1 and symmetrically formed with respect to a radial plane, in which the radially outer end face has a curvature corresponding to the cylinder curvature in the tensioned state.
  • the mutually facing, radially outer edges of the two clamping strips are designed as beak edges with clamping surfaces 3 which are angled at an acute angle with respect to the circumferential contour and which delimit a clamping channel 4 which converges towards the outside. In the untensioned state of the tensioning strips, they partially border with the sides facing away from one another, in each case also against insert pieces 5 which are also inserted in the cylinder recess.
  • the pressure plate 9 to be clamped is provided in the region of its ends with edge claws 10 which are angled at an acute angle and overlap the clamping surfaces.
  • the two eccentrics 11 are each rotated by 90 ° C. using a key, in this case the two clamping strips rotate self-centering around the roller.
  • the elastic hose 7 arranged in the clamping channel 4 is pressed against the outer contour of the cylinder.
  • a shaped piece 12 which forms the upper limit for the gap closure.
  • the gap sealing compound is pressed into the hose and pressed against the fitting through an opening in the hose. After the gap sealing compound has hardened, the outer contour of the filled gap resembles the outer contour of the cylinder.
  • the device according to FIGS. 3 and 4 basically corresponds to the device described above.
  • a bar 8 with prism-shaped outer contours is screwed into the cylinder 1 with screws 6 instead of the roller.
  • the eccentric 11 is turned by 90 ° C., the two clamping strips 2 are pressed against the prism-shaped outer edges of the strip in a self-centering manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
EP88118348A 1987-11-13 1988-11-04 Vorrichtung zum Spannen von Druckplatten Expired - Lifetime EP0316673B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3738568 1987-11-13
DE19873738568 DE3738568A1 (de) 1987-11-13 1987-11-13 Vorrichtung zum spannen von druckplatten

Publications (3)

Publication Number Publication Date
EP0316673A2 EP0316673A2 (de) 1989-05-24
EP0316673A3 EP0316673A3 (en) 1989-08-23
EP0316673B1 true EP0316673B1 (de) 1992-05-13

Family

ID=6340425

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88118348A Expired - Lifetime EP0316673B1 (de) 1987-11-13 1988-11-04 Vorrichtung zum Spannen von Druckplatten

Country Status (3)

Country Link
EP (1) EP0316673B1 (ja)
JP (1) JPH02137928A (ja)
DE (2) DE3738568A1 (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4420314C2 (de) * 1994-06-10 1999-02-04 Koenig & Bauer Albert Ag Vorrichtung zum Befestigen und Spannen von Druckplatten mit "Z"-förmig abgekanteten Enden
DE10250684B3 (de) 2002-10-31 2004-04-01 Koenig & Bauer Ag Verfahren zur Herstellung eines Rotationskörpers und Rotationskörper einer Druckmaschine
DE102004023008A1 (de) * 2004-05-10 2005-12-08 Maschinenfabrik Wifag Spann- und Registereinrichtung
JP2008006643A (ja) * 2006-06-28 2008-01-17 Hitachi Chem Co Ltd 版の取り付け構造

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3401760A1 (de) * 1984-01-19 1985-08-01 Albert-Frankenthal Ag, 6710 Frankenthal Vorrichtung zum spannen von druckplatten

Also Published As

Publication number Publication date
JPH02137928A (ja) 1990-05-28
EP0316673A2 (de) 1989-05-24
EP0316673A3 (en) 1989-08-23
DE3738568A1 (de) 1989-05-24
DE3871086D1 (de) 1992-06-17

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