EP0150300B1 - Dispositif d'encrage pour une machine à imprimer - Google Patents

Dispositif d'encrage pour une machine à imprimer Download PDF

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Publication number
EP0150300B1
EP0150300B1 EP84114019A EP84114019A EP0150300B1 EP 0150300 B1 EP0150300 B1 EP 0150300B1 EP 84114019 A EP84114019 A EP 84114019A EP 84114019 A EP84114019 A EP 84114019A EP 0150300 B1 EP0150300 B1 EP 0150300B1
Authority
EP
European Patent Office
Prior art keywords
duct
segments
inking unit
roller
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.)
Expired
Application number
EP84114019A
Other languages
German (de)
English (en)
Other versions
EP0150300A3 (en
EP0150300A2 (fr
Inventor
Claus Dipl.-Ing. Simeth
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.)
Manroland AG
Original Assignee
MAN Roland 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 MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Priority to AT84114019T priority Critical patent/ATE32678T1/de
Publication of EP0150300A2 publication Critical patent/EP0150300A2/fr
Publication of EP0150300A3 publication Critical patent/EP0150300A3/de
Application granted granted Critical
Publication of EP0150300B1 publication Critical patent/EP0150300B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/04—Ducts, containers, supply or metering devices with duct-blades or like metering devices

Definitions

  • the invention relates to an inking unit for a printing press with an ink fountain roller, an ink fountain that can be adjusted to the ink fountain roller, with a plurality of ink metering elements that can be adjusted independently of one another in terms of their distance from the ink fountain roller.
  • the individual ink metering elements are adjusted in their distance from the ink fountain roller for zone-by-zone metering of the ink film produced on the ink fountain roller so that a metering gap is created which allows the desired amount of ink to flow through.
  • very high hydrodynamic pressure forces sometimes occur between the ink metering elements and the ink fountain roller. In zones with the lowest ink flow, these compressive forces reach a value ten powers higher than in zones with a large ink flow. Any other setting of the ink metering elements therefore results in a different load and deflection of the ink fountain roller over the entire machine width, so that precise adjustment of the individual ink metering elements is time-consuming and difficult.
  • a holding block of the inking elements carrying the ink metering elements which extends across the entire width of the printing press, has a stop which bears against the inking roller when the holding block is engaged against the inking roller.
  • the contact surfaces of the stop have a curvature that corresponds to that of the ink fountain roller.
  • the invention has for its object to provide an inking unit of the type mentioned, in which the setting of the ink metering elements is no longer adversely affected by the deflection of the ink fountain roller.
  • the ink fountain consists of several juxtaposed box segments, which are individually mounted directly on the ink fountain roller, each box segment forming a carrier for part of the ink metering elements. Due to this division of the ink fountain into individual fountain segments, which can follow the deflection of the ink fountain roller due to their mounting, the influence of the deflection on the metering gap is reduced so considerably that readjustment of the ink metering elements is no longer necessary.
  • the bearing of the box segments on the ink fountain roller is designed such that it absorbs the hydrodynamic pressure forces that occur during operation.
  • This development of the invention has the advantage that the deflection of the ink fountain roller is significantly reduced because the effective bending length of the ink fountain roller is reduced to the much smaller distance between the storage of the box segments. Since the magnitude of the inherent deflection is determined by the fourth power of the bending length, this measure according to the invention already results in a considerable reduction in the deflection of the ink fountain roller when the ink fountain is divided into four fountain segments that it can be neglected when setting the ink metering elements.
  • a carrier box is provided according to a further proposal of the invention, which is mounted on the ink fountain roller and to which the individual box segments are fastened so as to be pivotable to a limited extent. This creates a storage that enables easy assembly of the box segments for maintenance or repair purposes.
  • the mounting of the box segments on the carrier box can be carried out transversely to their pivot axis.
  • the ink fountain roller preferably carries bearing rings adjacent to the lateral ends of the barrel segments, to which the carrier box is flanged and to which the barrel segments bear with adjustable stops. This creates a low-wear bearing that enables the box segments to be precisely adjusted to the ink fountain roller. It is advantageous if the bearing rings are embedded in grooves in the ink fountain roller and their outer diameter in the area of the lifter and the ink metering elements is not greater than the outer diameter of the ink fountain roller. In this way, a lifter with a continuous lifter roller can be moved freely to the ink fountain roller. In the area of ink metering elements, this design of the bearing rings simplifies the sealing of the box segments from the ink box roller.
  • a particularly simple embodiment of the ink fountain roller according to the invention is that the ink fountain roller consists of a continuous shaft and a plurality of tube segments pushed onto the shaft and connected to it in a rotationally fixed manner, one tube segment interacting with the ink metering elements of one tube segment and one on both sides of the tube segments Bearing ring is loosely mounted on the shaft.
  • the axial play between the tube segments and the bearing rings is advantageously adjusted by a clamping nut screwed to one end of the shaft, which cooperates with a fixed shaft collar at the other end of the shaft.
  • the axial fixing of the pipe segments on the shaft can also be carried out in such a way that a pipe segment lying in the middle of the shaft is axially immovably connected to the shaft and that between the two outer bearing rings and those adjacent to them, fastened to the shaft ends Stop elements compression springs are clamped. This ensures that the individual pipe segments and the bearing rings are pressed axially against one another without play, the fixing on the shaft being carried out by the pipe segment lying in the middle.
  • This configuration has the advantage that thermal expansion of the tube segments can be absorbed elastically.
  • this embodiment has the advantage that the displacement of the tube segments and the box segments connected to them via the bearing rings in the axial direction, which is caused by the thermal expansion of the tube segments, is at most half as large as the total thermal expansion of the ink fountain roller formed by all tube segments.
  • the storage of the box segments is advantageously designed to be elastic according to a further proposal of the invention.
  • springs are clamped between the box segments and the carrier box, by means of which the box segments with the adjustable stops at their lateral ends are pressed against the bearing rings on the ink fountain roller.
  • the box segments can follow movements or deformations of the ink fountain roller without there being any constraining forces and a change in their distance from the ink fountain roller.
  • the preload of the suspension is designed so that it is greater than the maximum hydrodynamic pressure forces that occur on the ink metering elements.
  • the stops are advantageously formed by adjusting screws which lie approximately in the plane of the ink metering elements.
  • the adjusting screws on the adjacent ends of two box segments are preferably offset from one another in the circumferential direction on the same bearing ring. This results in a very compact design, which means that the ink-free zones on the ink fountain roller remain small in the area of the bearing rings.
  • a traverse running parallel to the ink fountain roller is provided according to the invention, by means of which the carrier box is fixed in its position relative to the ink fountain roller.
  • the tube segments of the ink fountain roller, the box segments and corresponding sections of the carrier box are designed as coordinated building modules which can be strung together in any number to form different inking unit widths.
  • the ink fountain roller 1 consists of a continuous shaft 2, which is supported with its two ends in the side frames 3 of a printing press.
  • bearing rings 4 and tube segments 5 are pushed in alternating order such that the side frames 3 each have a bearing ring 4 adjacent.
  • the pipe segments 5 are connected to the shaft 2 by driver pins 6.
  • the bearing rings 4 and the tubular segments 5 are held by an annular collar 7 fastened to the shaft 2 and a clamping nut 8 screwed to the shaft 2. With the clamping nut 8, the axial movement play required on the bearing rings 4 can be set.
  • the outer diameter of the bearing rings 4 and the tube segments 5 is approximately the same.
  • a carrier box 10 On the bearing rings 4 webs 9 of a carrier box 10 are fastened with screws.
  • the carrier box 10 is further held by a crossmember 11 which extends parallel to the ink fountain roller 1 and is fastened in the side frames 3. Between two webs 9 there is a box segment 12, which is pivotably mounted on the webs 9 in the vicinity of the crossbar 11.
  • the carrier box 10 shown has five webs 9 and can therefore accommodate four box segments 12. For reasons of simplification, however, only two box segments 12 are shown in the drawing.
  • Each box segment 12 carries ink metering elements and adjusting devices 14 designed as slides 13, with which the distance of the individual sliders 13 from the ink fountain roller 1 can be set independently of one another.
  • the adjusting devices 14 can be adjusted by hand or by motor.
  • the box segments 12 are supported directly on the bearing rings 4 by means of adjusting screws 15, 16.
  • the engagement of the adjusting screws 15, 16 on the bearing rings 4 is ensured by compression springs 17 which are clamped between the carrier box 10 and the box segments 12.
  • the adjusting screws 14, 15 are located on the lateral ends of the box segments 12 and lie approximately in the same plane as the slides 13. As can be seen from FIG. 3, the adjusting screws 15 and the adjusting screws are located 16 offset in the circumferential direction against each other on the bearing ring 4, so that the adjacent ends of two box segments 12 can be supported on a bearing ring 4.
  • the box segments are first brought into a zero position with the aid of the adjusting screws 15, 16, in which the end edges of the slides 13 abut in parallel on the respectively adjacent tube segment 5 of the ink fountain roller 1.
  • the adjustment screws 15, 16 can be adjusted by hand or by motor.
  • the individual slides 13 are then set to the required distance from the ink fountain roller in accordance with the desired color profile.
  • the correct setting is achieved without difficulty according to previously calculated or empirically determined setting values, since the deflection of the ink fountain roller in the sections between the bearing rings 4 is so small that it does not influence the setting.
  • the ink film produced on the ink fountain roller 1 is transferred in the usual way from a lifting roller 18 to a distribution roller, not shown.
  • a distribution roller not shown.
  • the inking unit By building the inking unit from individual building segments, a modular construction is achieved that allows adaptation to printing machines of different widths with little construction effort.
  • the width of the individual building modules is determined so that the desired machine width is achieved by adding one or more building modules.
  • FIG. 4 Such an arrangement is illustrated in FIG. 4.
  • the inking unit there consists of a left end module 20, three identical intermediate modules 21 and a right end module 22. If a different width is required, intermediate modules 21 are added or removed.
  • the bearing rings 4, 4 'and the tube segments 5 also shows an axial mounting of the bearing rings 4, 4 'and the tube segments 5 on the shaft 2, in which the compression springs 24 arranged on both ends of the shaft, the bearing rings 4, 4' and the tube segments 5 in the axial direction without play against one another to press.
  • the compression springs 24 are clamped between the outer bearing rings 4 'and screw nuts 23 screwed to the ends of the shaft 2. By adjusting the clamping nuts 23, the bias of the springs 24 can be changed.
  • the middle tube segment 5 is axially immovably connected to the shaft 2.
  • This design has the advantage that thermal expansions can be absorbed elastically by the compression springs 24 and do not lead to the tube segments being braced relative to the bearing rings. Furthermore, a uniform distribution of the thermal expansion to both sides is achieved by the center fixation, so that the maximum displacement, in particular of the outer bearing rings 4 ', is only half as large as the longitudinal expansion caused by heating.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Dot-Matrix Printers And Others (AREA)

Claims (15)

1. Dispositif d'encrage pour une machine imprimante comportant un cylindre d'encrier et un encrier, qui peut être monté sur le cylindre d'encrier, ayant plusieurs éléments de dosage d'encre réglables indépendamment l'un.de l'autre en ce qui concerne leur écartement par rapport au cylindre d'encrier, caractérisé en ce que l'encrier est constitué de plusieurs segments d'encrier (12) se trouvant l'un à côté de l'autre, qui sont montés directement de façon individuelle sur le cylindre d'encrier (1), chaque segment d'encrier constituant un support pour une partie des éléments de dosage d'encre (13).
2. Dispositif d'encrage selon la revendication 1, caractérisé en ce que les moyens de montage (4,10,17) des segments d'encrier (12) reçoivent les forces de pression hydrodynamiques se produisant en fonctionnement sur le cylindre d'encrier (1) et les éléments de dosage d'encre (13).
3. Dispositif d'encrage selon la revendication 1 ou 2, caractérisé en ce que les segments d'encrier (12) sont fixés en pouvant pivoter de façon limitée à un support (10), qui est monté sur le cylindre d'encrier (1).
4. Dispositif d'encrage selon la revendication 3, caractérisé en ce que le montage des segments d'encrier (12) est réalisé de façon flottante transversalement à l'axe de pivotement.
5. Dispositif d'encrage selon une des revendications précédentes, caractérisé en ce que le cylindre d'encrier (1) porte, à chaque fois, aux extrémités latérales des segments d'encrier (12), des bagues de palier voisines (4), sur lesquelles est bridé le support (10) et contre lesquels s'appuient les segments d'encrier par des butées réglables (15, 16).
6. Dispositif d'encrage selon une des revendications précédentes, caractérisé en ce que les bagues de palier (4) sont encastrées dans des gorges du cylindre d'encrier (1) et leur diamètre externe dans la zone du preneur (18) et des éléments de dosage d'encre (13) ne dépasse pas le diamètre externe du cylindre d'encrier (1).
7. Dispositif d'encrage selon une des revendications précédentes, caractérisé en ce que le cylindre d'encrier (1) est constitué d'un arbre continu (2) et de plusieurs segments tubulaires (5) disposés sur l'arbre et reliés à celui-ci sans pouvoir tourner, un segment tubulaire coopérant à chaque fois avec les éléments de dosage d'encre (13) d'un segment d'encrier (12), et en ce que, à chaque fois, sur les deux côtés des segments tubulaires est montée une bague de palier (4) de façon mobile sur l'arbre.
8. Dispositif d'encrage selon la revendication 7, caractérisé en ce que le jeu axial entre les segments tubulaires (5) et les bagues de palier (4) est réglable par l'intermédiaire d'un écrou de serrage (8), vissé à une extrémité de l'arbre, qui coopère avec un collier fixe (7) à l'autre extrémité de l'arbre.
9. Dispositif d'encrage selon la revendication 7, caractérisé en ce qu'un segment tubulaire (5) se trouvant au milieu de l'arbre (2) est relié à l'arbre de façon axialement fixe, et en ce que, entre les deux bagues de palier externes (4') et les éléments de butée (23) voisins fixés'aux extrémités de l'arbre, sont montés des ressorts de pression (24).
10. Dispositif d'encrage selon une des revendications précédentes, caractérisé en ce que, entre les segments d'encrier (12) et le support (10), sont montés des ressorts de pression (17), grâce auxquels les segments d'encrier avec les butées réglables (15, 16) sont pressés à leurs extrémités latérales contre les bagues de palier (4) du cylindre d'encrier (1).
11. Dispositif d'encrage selon la revendication 10, caractérisé en ce que les butées sont formées par des vis de réglage (15, 16), qui se trouvent approximativement dans le même plan que les éléments de dosage d'encre (13).
12. Dispositif d'encrage selon la revendication 11, caractérisé en ce que les vis de réglage (15, 16) aux extrémités voisines l'une de l'autre de deux segments d'encrier (12) reposent contre la même bague de palier (4) de façon décalée l'une de l'autre en direction périphérique.
13. Dispositif d'encrage selon une des revendications précédentes, caractérisé en ce que le support (10) est fixé au moyen d'une traverse (11), s'étendant parallèlement au cylindre d'encrier (1), aux bâtis latéraux (3) de la machine imprimante.
14. Dispositif d'encrage selon une des revendications précédentes, caractérisé en ce que les segments tubulaires (5) du cylindre d'encrier (1), les segments d'encrier (12) et les parties correspondantes du support (10) sont réalisés en tant que modules adaptés l'un à l'autre, qui, pour former différentes largeurs de dispositif d'encrage, peuvent être alignés l'un à côté de l'autre en un nombre quelconque.
EP84114019A 1984-01-12 1984-11-20 Dispositif d'encrage pour une machine à imprimer Expired EP0150300B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84114019T ATE32678T1 (de) 1984-01-12 1984-11-20 Farbwerk fuer eine druckmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3400831 1984-01-12
DE3400831A DE3400831C2 (de) 1984-01-12 1984-01-12 Farbkasten für eine Druckmaschine

Publications (3)

Publication Number Publication Date
EP0150300A2 EP0150300A2 (fr) 1985-08-07
EP0150300A3 EP0150300A3 (en) 1986-03-05
EP0150300B1 true EP0150300B1 (fr) 1988-03-02

Family

ID=6224766

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84114019A Expired EP0150300B1 (fr) 1984-01-12 1984-11-20 Dispositif d'encrage pour une machine à imprimer

Country Status (5)

Country Link
US (1) US4611538A (fr)
EP (1) EP0150300B1 (fr)
JP (1) JPS60161153A (fr)
AT (1) ATE32678T1 (fr)
DE (1) DE3400831C2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19629811A1 (de) * 1996-07-24 1998-01-29 Roland Man Druckmasch Farbwerk für Rotationsdruckmaschinen
US5979310A (en) * 1996-11-18 1999-11-09 Pitney Bowes Inc. Apparatus and method for printing images
US5862753A (en) * 1996-11-18 1999-01-26 Pitney Bowes, Inc. Ink jet printing apparatus with handheld applicator
US5966157A (en) * 1996-11-18 1999-10-12 Pitney Bowes Inc. Method for cleaning residual ink from a transfer roller in an ink jet printing apparatus
US5899615A (en) * 1996-12-16 1999-05-04 Pitney Bowes Inc. Apparatus and method for two-sided printing
WO2002016138A1 (fr) * 2000-08-23 2002-02-28 Cti-Systems Gmbh Modules constitues de lamelles de colorimetre modulaire et de sections de traverse
DE102010045406A1 (de) 2009-10-09 2011-04-14 Heidelberger Druckmaschinen Ag Vorrichtung zum Dosieren von Druckfarbe

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US729002A (en) * 1902-07-15 1903-05-26 Robert Hoe Ink-fountain.
US2948217A (en) * 1958-01-09 1960-08-09 Diamond National Corp Ink fountain
DE2230126B2 (de) * 1972-06-21 1974-06-12 Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach Dosiervorrichtung eines Farbkastens an Druckmaschinen
DE2629331C3 (de) * 1976-06-30 1979-03-08 Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach Farbdosiereinrichtung an Druckmaschinen
DE2648098C3 (de) * 1976-10-23 1984-01-05 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Farbkasten für Offset- oder Hochdruckmaschinen
US4123972A (en) * 1977-05-12 1978-11-07 Baldwin-Gegenheimer Corporation Positioning mechanism for locating the edge of an ink metering means
JPS57138948A (en) * 1981-02-20 1982-08-27 Komori Printing Mach Co Ltd Ink reservoir apparatus for printing press
US4372207A (en) * 1981-03-10 1983-02-08 Komori Printing Machinery Co., Ltd. Ink fountain devices for use in printing press
FR2527987B1 (fr) * 1982-06-04 1986-06-20 Creusot Loire Dispositif d'encrage a lame basse a cuvettes d'encrier amovibles
DE3239259C2 (de) * 1982-10-23 1985-04-11 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Vorrichtung zum zonenweisen Dosieren von Farbe auf der Farbkastenwalze eines Farbwerkes für Druckmaschinen
DE3311113C1 (de) * 1983-03-26 1988-05-05 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Dosierelemente in Farbkaesten von Offsetdruckmaschinen

Also Published As

Publication number Publication date
DE3400831C2 (de) 1986-03-06
EP0150300A3 (en) 1986-03-05
EP0150300A2 (fr) 1985-08-07
US4611538A (en) 1986-09-16
JPH051142B2 (fr) 1993-01-07
JPS60161153A (ja) 1985-08-22
ATE32678T1 (de) 1988-03-15
DE3400831A1 (de) 1985-07-25

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