EP0061618A1 - Unité d'impression pour une petite machine à imprimer offset - Google Patents

Unité d'impression pour une petite machine à imprimer offset Download PDF

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Publication number
EP0061618A1
EP0061618A1 EP82101937A EP82101937A EP0061618A1 EP 0061618 A1 EP0061618 A1 EP 0061618A1 EP 82101937 A EP82101937 A EP 82101937A EP 82101937 A EP82101937 A EP 82101937A EP 0061618 A1 EP0061618 A1 EP 0061618A1
Authority
EP
European Patent Office
Prior art keywords
printing unit
cylinder
forme cylinder
forme
unit according
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Withdrawn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
EP82101937A
Other languages
German (de)
English (en)
Inventor
Friedrich Preuss
Walter Dr.-Ing. Wasserbäch
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.)
Form All Formularsatzmaschinen GmbH
Original Assignee
Form All Formularsatzmaschinen 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 Form All Formularsatzmaschinen GmbH filed Critical Form All Formularsatzmaschinen GmbH
Publication of EP0061618A1 publication Critical patent/EP0061618A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41L—APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
    • B41L17/00—Lithographic printing apparatus for office or other commercial purposes
    • B41L17/08—Lithographic printing apparatus for office or other commercial purposes for offset printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
    • B41F13/26—Arrangement of cylinder bearings
    • B41F13/30—Bearings mounted on sliding supports

Definitions

  • the invention relates to a printing unit for a small offset printing press with at least one exchangeable drivable form cylinder, which is in engagement with a blanket cylinder and an application roller.
  • the printing form arranged on the form cylinder must be replaced when the print run has been reached. To do this, the press must be stopped and the mold removed. Especially in relatively small numbers, as they occur frequently on small offset presses, is the replacement of the printing form is an unwanted interruption, especially when neither the paper nor the color of the successive print runs are different and so far anyway conversion - spp would be required.
  • the object of the invention is therefore a printing unit of the type mentioned at the outset in such a way that a change of shape is made possible without stopping the machine, so that the considerable interruptions in operation previously caused by the replacement are eliminated.
  • each forme cylinder guide is movably mounted in the machine frame in such a way that the forme cylinders in one end position can be brought into engagement with the blanket cylinder, and that the two forme cylinders can optionally be connected to the drive device via a positive coupling.
  • the two forme cylinders can alternately be brought into engagement with the blanket cylinder and the applicator roller and coupled to the drive device, the other forme cylinder being brought out of its engagement position into its other end position in the forme cylinder guide and the mold can be exchanged while the machine is running continuously and prints with the form cylinder engaged.
  • the prepared new forme cylinder is brought into engagement and the other forme cylinder, which was previously used for printing, is moved back to change the form.
  • the forme cylinder engages with the application roller it is accelerated bump-free to approximately its operating speed; Only then will the form fit sige clutch switched to establish the slip-free connection with the drive device.
  • the two forme cylinder guides are mounted in the machine frame so as to be pivotable about the axis of rotation of the application roller. This ensures that the forme cylinder in its one end position in the forme cylinder guides is always in the predetermined engagement position with the application roller. The pivoting of the forme cylinder guide then only makes the necessary adjustment to the blanket cylinder.
  • these two eccentrics can each be arranged on a common eccentric bushing which can be rotated about the axis of the rubber blanket cylinder.
  • each forme cylinder guide consists of two parallel guide cheeks, along which two interconnected bearing bodies can be moved, in which the forme cylinder is rotatably mounted, and that the two bearing bodies by means of a toggle lever drive mounted on the forme cylinder guide between its two end positions can be moved.
  • the two forme cylinders each carry at one end a coupling part of a positive coupling
  • the other coupling part is attached to the inner end of an axially displaceable shaft, on the outer end of which a rotatably connected sliding part engages
  • the two sliding parts also two mutually offset by approximately 180 0 eccentrics of a common eccentric shaft extending transversely to the axes of the two displaceable shafts are in engagement in such a way that when the eccentric shaft rotates, the two shifting parts alternately bring the two coupling parts into and out of clutch engagement.
  • a paper web 1 to be printed moves between a printing cylinder 2 and a blanket cylinder 3, which are drivably mounted in a machine frame 4 (FIG. 2).
  • a forme cylinder 6 is arranged between the blanket cylinder 3 and an applicator roller 5, which is arranged at a distance above it and is connected to the inking unit (not shown), and which contacts both the applicator roller 5 and the blanket cylinder 3 in order to be able to print Set the ink from the applicator roller 5 to transfer to the blanket cylinder 3.
  • the form cylinder 6 carrying the printing form is supported at both ends in a bearing body 7, which are rigidly connected to one another by a rod 8.
  • the two bearing bodies 7 are longitudinal in two mutually parallel guide cheeks 9 slidably guided, which together form a form cylinder guide.
  • the guide cheeks 9 each have an arm 10 with which they are mounted in the machine frame 4 so as to be pivotable about the axis of the application roller 5.
  • a toggle lever shaft 11 is mounted axially parallel to the forme cylinder 6, on which arms 12 are fastened, which extend to a pivot pin 13 forming a knee joint, which is articulated to the rod 8 via two links 14.
  • the parts 11 to 14 form a toggle lever drive in the manner that the printing cylinder 6 receiving the bearing body 7 at a pivoting of the toggle lever shaft 11 through approximately 180 0 between the in Figs. 1 and end position shown in solid lines 2 and a dot-dash lines in Fig. 1 end position shown can be moved.
  • links 15 are articulated, each of which engages with one eye around an eccentric bushing 16, which are arranged rotatably about the axis of the blanket cylinder 3 between the ends of the blanket cylinder 3 and its bearings 17.
  • the two eccentric bushes 16 are each connected via gears 18, 19 to a common countershaft 20. When the countershaft 20 rotates, the two eccentric bushes 16 are rotated; About the handlebar 15, the guide cheeks 9 are pivoted such that the forme cylinder 6 nit the desired Contact pressure is pressed against the blanket cylinder 3 or released from it again.
  • each Exzenterbü.chse 16 has axially adjacent eccentrics 21 and 21 'for the handlebars 15 and 15'.
  • the eccentrics 21 and 21 ' are offset from one another in the circumferential direction, that alternately a printing cylinder 6 or the other form cylinders 6 upon rotation of the eccentric bushings 16 through approximately 180 0' is pressed against the blanket cylinder. 3
  • Fig. 1 it is indicated that the forme cylinder 6 is in full engagement with the blanket cylinder 3, while the forme cylinder 6 'is lifted from the blanket cylinder 3 and can be moved into its other end position in the guide cheeks 9 in this position.
  • Fig. 2 it is shown using the example of the one forme cylinder 6 that the two forme cylinders carry at one end a coupling part 22a of a positive coupling 22, for example a one-tooth coupling, which is opposite the other coupling part 22b, which is arranged at the inner end of a shaft 23 , the is axially displaceable in a drive gear 24 mounted in the machine frame 4 but is non-rotatably received.
  • a coupling part 22a of a positive coupling 22 for example a one-tooth coupling
  • the other coupling part 22b which is arranged at the inner end of a shaft 23
  • a bell 26 is attached by means of a bearing 25, which can be axially displaced by an eccentric 27 which engages in a window of the bell 26.
  • the eccentric 27 is seated in a rotationally fixed manner on an eccentric shaft 28 (FIG. 3) which extends transversely to the axes of the two displaceable shafts 23 and 23 '.
  • the eccentric shaft 28 is connected to an eccentric 27 'offset from the eccentric 27 by 180 °, which axially shifts the shaft 23' for coupling the forme cylinder 6 'via a bell 26' and a bearing 25 'in the same way as for the Forme cylinder 6 has been described.
  • Fig. 3 it is indicated that the two bells 26 and 26 'are each connected to a fork 29 and 29', which partially encompass the eccentric shaft 28 and prevent rotation of the bell 26 and 26 '.
  • the gear 24 driving the shaft 23 and the gear 24 'driving the shaft 23' are connected to a gear 30 connected to the blanket cylinder 3 and to the drive device (not shown) of the printing unit.
  • a bearing journal 31 is rotatably mounted in the forme cylinder 6 at the end of the forme cylinder 6 remote from the coupling 22.
  • the bearing pin 31 engages with a head 32 into a guide rail 33 which forms an adjustment body and which is axially adjustable by means of a screw drive 34 mounted on the machine frame 4. Since the two bearing bodies 7 can be displaced by a small amount in the guide cheeks 9, the forme cylinder 6 can be axially adjusted in this way.
  • the two forme cylinders 6 and 6 ' are alternately in their in Flg. 1 shown inner end position and pressed by pivoting the associated guide cheeks 9 and 9 'about the axis of the applicator roller 5 against the blanket cylinder 3.
  • the other, not pressed forme cylinder in the example according to FIG. 1 the forme cylinder 6 '
  • the toggle lever drive in order to change the printing form.
  • the printing unit continues to run without interruption.
  • the one forme cylinder for example the forme cylinder 6, is in its pressing position against the applicator roller 5, it is carried along by this by frictional engagement with a rotation which corresponds approximately to its operating speed.
  • the coupling part 22b is moved against the coupling part 22a by rotating the eccentric shaft 28. Since the two coupling parts 22a and 22b rotate somewhat relative to one another, the two coupling parts come into engagement after a short time; the eccentric shaft 28 can then be rotated completely into its end position.
  • the clutch of the other forme cylinder 6 ' is opened so that it can be moved into its other end position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
EP82101937A 1981-04-01 1982-03-11 Unité d'impression pour une petite machine à imprimer offset Withdrawn EP0061618A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813112995 DE3112995C2 (de) 1981-04-01 1981-04-01 Druckwerk für eine Kleinoffsetdruckmaschine
DE3112995 1981-04-01

Publications (1)

Publication Number Publication Date
EP0061618A1 true EP0061618A1 (fr) 1982-10-06

Family

ID=6128967

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82101937A Withdrawn EP0061618A1 (fr) 1981-04-01 1982-03-11 Unité d'impression pour une petite machine à imprimer offset

Country Status (2)

Country Link
EP (1) EP0061618A1 (fr)
DE (1) DE3112995C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5063844A (en) * 1989-05-27 1991-11-12 Simom S.A. Offset rotary machine with at least one printing unit
US5184551A (en) * 1990-05-28 1993-02-09 Windmoller & Holscher Printing press

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB270363A (en) * 1925-12-03 1927-05-03 Edgar Wilton Smith Improvements in or relating to apparatus for printing late news in news-paper printing machines
EP0026628A1 (fr) * 1979-09-26 1981-04-08 Drg (Uk) Limited Machines à imprimer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB270363A (en) * 1925-12-03 1927-05-03 Edgar Wilton Smith Improvements in or relating to apparatus for printing late news in news-paper printing machines
EP0026628A1 (fr) * 1979-09-26 1981-04-08 Drg (Uk) Limited Machines à imprimer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5063844A (en) * 1989-05-27 1991-11-12 Simom S.A. Offset rotary machine with at least one printing unit
US5184551A (en) * 1990-05-28 1993-02-09 Windmoller & Holscher Printing press

Also Published As

Publication number Publication date
DE3112995C2 (de) 1983-07-07
DE3112995A1 (de) 1982-10-14

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): CH FR GB IT NL SE

17P Request for examination filed

Effective date: 19830325

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19850514

RIN1 Information on inventor provided before grant (corrected)

Inventor name: PREUSS, FRIEDRICH

Inventor name: WASSERBAECH, WALTER, DR.-ING.