EP0667238A1 - Mécanisme de commande pour l'alimentation en encre d'une machine à imprimer en offset - Google Patents

Mécanisme de commande pour l'alimentation en encre d'une machine à imprimer en offset Download PDF

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Publication number
EP0667238A1
EP0667238A1 EP95810078A EP95810078A EP0667238A1 EP 0667238 A1 EP0667238 A1 EP 0667238A1 EP 95810078 A EP95810078 A EP 95810078A EP 95810078 A EP95810078 A EP 95810078A EP 0667238 A1 EP0667238 A1 EP 0667238A1
Authority
EP
European Patent Office
Prior art keywords
ink
eccentric
control device
positioning
peripheral surface
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
EP95810078A
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German (de)
English (en)
Other versions
EP0667238B1 (fr
Inventor
Hanspeter Bruni
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.)
Sycolor Consulting AG
Original Assignee
Bruni AG Grafische Maschinen
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 Bruni AG Grafische Maschinen filed Critical Bruni AG Grafische Maschinen
Publication of EP0667238A1 publication Critical patent/EP0667238A1/fr
Application granted granted Critical
Publication of EP0667238B1 publication Critical patent/EP0667238B1/fr
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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
    • 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 a control device for the ink supply of an offset printing press with at least one flexible ink knife, which limits an ink bath inclined in the direction of an ink ductor and can be bent differently zone by zone against the cylindrical surface of the ink ductor, and adjusting means for bending the ink knife edge, which are in a guide have axially displaceable plungers and an associated positioning eccentric each with an axis parallel to the ink duct axis, the plungers being pressed against the circumferential surface of the positioning eccentric with springs.
  • A1 2550720 describes a generic ink supply control, in the inking unit the actuating means have plungers which can be displaced in the direction of their longitudinal axis by an eccentric. Each plunger is pivotally mounted in a carrier device about its axis perpendicular to the ink ductor axis. Each plunger is also equipped with a spring that constantly presses it against the assigned eccentric.
  • An eccentric can be rotated by means of an adjusting lever that can be operated manually from the outside in such a way that the lower edge of the flexible ink knife can be adjusted in zones over the plunger relative to the jacket of the inking roller.
  • the control levers are swiveled within a scale, so a certain setting can be reproduced.
  • the zone-by-zone setting of the color meter is greatly improved if it is designed as a lamella color meter.
  • Lamellar color knives are known, for example, from CH, A5 602345, which are referred to as color knives for the ink fountain roller become.
  • This color knife has cutouts in the area of the working edge, which are on both sides of adjoining set screws.
  • the lamellae formed in this way can be adjusted individually, influencing the neighboring knife areas is excluded or at least considerably reduced.
  • the thickness of the ink layer can be adjusted with the adjusting screws on each lamella, individual colors in the different ink zones can be adjusted as required by the print image in the various width ranges.
  • the spaces between the lamellas must be designed in such a way that no ring beads can appear on the ink duct.
  • the inventor has set himself the task of creating a control device of the type mentioned at the outset, which can be used universally, has easily adjustable plungers and has play-free supporting eccentrics with precise, reproducible setting.
  • the object is achieved according to the invention in that the self-locking positioning eccentrics, alternating with bearing jaws for their non-rotatable, coaxial bearing bolts, are arranged directly on a mounting bar as a control unit or with an adapter for interchangeable attachment to the offset printing press, the peripheral surface of the positioning eccentrics in a longitudinal groove Control unit is exposed.
  • Special and further developed embodiments of the control device are the subject of dependent claims.
  • the mounting bar or adapter is known per se Designed in such a way that the device according to the invention can be installed as a control unit on each offset printing press.
  • An adapter can be, for example, simple elbows.
  • the longitudinal groove of the control unit with the exposed locating eccentrics is preferably rectangular with respect to the cross section and serves to guide sliding pieces which are assigned to the free end of the plunger and accommodate this.
  • the sliders are expediently located directly on the circumferential surface of the positioning eccentric and transmit the force imparted by this to the plunger, which in turn rests directly on the flexible color knife.
  • the track pieces only have a certain degree of lateral freedom, which can be remedied by means of spacers, guides or the like.
  • the plungers are held in the longitudinal direction in a bore of the associated slide, preferably in the longitudinal center, the bore preferably having an internal thread and the plunger having an external thread.
  • the preferably individually length-adjustable ram is provided with means which allow trouble-free application of force for turning from the outside. Although the thread of the slide and ram is self-locking, fixing the ram contributes to operational safety.
  • the progressively curved peripheral surface of the positioning eccentric must be worked out with the highest precision.
  • the setting of the ink gap is more sensitive the closer the ink knife edge is pressed to the ink duct.
  • the circumferential surface of the positioning eccentric and the position of its bore for receiving the bearing bolts are calculated using known parameters for the progression using known mathematical methods.
  • the positioning eccentrics rotatably mounted on at least one fixed bearing pin preferably have a self-locking braking element which is pressed onto the bearing pin (s).
  • the operational safety and reliability of the relative deflection from the eccentric to the bearing pin is essential, the adjustment is usually carried out several times a day, with each print job.
  • the actuating lever is screwed into a bore that extends up to the guide pin.
  • an intermediate piece e.g. a spring
  • the braking element consists, for example, of aluminum or a plastic. It must not leave scratch marks on the guide pin and / or not seize.
  • the bore for the braking element of an actuating cam does not lie on the extension of its actuating lever, but is angled to it.
  • the braking element is in turn pressed onto the guide pin by a force exerted directly or expediently by a spring by means of a screw.
  • the positioning eccentrics are therefore produced in a uniform standard width and with a few standardized curvature characteristics for their peripheral surface.
  • the slats of a color knife are of different widths.
  • the distances from the center of the slats to the center of the slats vary, for example, from 28 to 35 mm.
  • the width of the positioning eccentrics is produced according to the smallest distance from the center of the plate to the center of the plate, minus the width of a bearing jaw. Wider distances can be compensated for by making the bearing jaws correspondingly wider. So that the bearing jaws can also be held uniformly in stock, correspondingly wide washers are preferably inserted on both sides of the positioning eccentric for larger widths.
  • the standardized positioning eccentrics preferably have a step-like narrowing of the circumferential surface on both end faces.
  • the circumferential surface which is reduced in width, corresponds to a groove in the associated sliding piece, which also results in perfect guidance in the axial direction of the bearing bolts.
  • the control unit according to the invention is constructed on the modular principle, and is particularly suitable for retrofitting all makes of offset printing machines. Depending on the desired comfort level, it can act on simple color meters, which are the rule in the basic equipment, or on a zone color meter.
  • the eccentrics can be adjusted fully automatically, either manually or at the highest comfort level in a manner known per se, using electronically controlled actuators.
  • Suitable control units with the same, standardized positioning eccentrics can be installed for each make using a mounting bar or a simple adapter, for example an angle profile.
  • Standardized eccentrics are essential, especially with high-precision, progressively curved circumferential surfaces, because the costs in terms of manufacture and warehousing can be significantly reduced.
  • a paint box 10 shown in FIG. 1, known per se, with a color duct 12 comprises a color knife 14 made of a flexible metal plate and side jaws 16 arranged on both sides.
  • these side jaws 16 consist of a metal jaw connected to a knife carrier 18 via countersunk screws 20 and a plastic plate spring-mounted on the metal jaw via hook clips 22 and hold-down clips 24.
  • the brackets 22, 24 are connected to the metal jaw by means of screws 26.
  • four resilient ball screws 28 press the plastic plate against the end face of the ink ductor 12 with a total force of approximately 10 N.
  • the side jaw 16 has free space in the region of the roll neck 30 of the ink duct 12 with the longitudinal axis A. Only a partial segment 32 of the plastic plate of the side jaw 16 is visible, which rests on the end face 34 of the ink duct 12 and ensures the lateral sealing. Wear of the partial segment 32 is compensated for by the resilient ball screws 28 pressing on the plastic plate.
  • the plastic plate of the side jaw 16 has a groove with a sealing compound 38 on which the ink knife 14 rests.
  • the color knife 14 is appropriately divided into slats 46 in the area of the knife edge 36 placed against the running surface 42 of the color ductor 12 or pressed in the vicinity thereof by cuts 44 of equal length running at right angles to it (FIG. 2).
  • the individual, preferably equally wide, slats 46, symbolized by an arrow 48, can be bent elastically parallel to the duct axis A by the action of adjusting means.
  • Known adjusting means are, for example, simple adjusting screws, eccentrics or further developed, also automatic adjusting means.
  • FIG. 2 shows part of a slat color meter 14.
  • the spaces b between the slats 46 are also sealed so that no color really runs out. This can be done in a manner known per se.
  • a thin, flexible metal strip 50 is applied in a sealing manner to the top of the generally 1 to 3 mm, in particular 1.5 to 2.5 mm thick slats 46, preferably by means of an adhesive 52.
  • Each slat 46 is attached by means of a an actuating means indicated in the lamella, in the present case a bolt 54, is pressed against the running surface 42 of the ink ductor 12 (FIG.
  • the flexible, for example about 0.2 mm thick, band 50 made of spring steel can compensate for this displacement without any significant effect on the adjacent slats 46 and absolutely prevents any color leakage between the slats 46.
  • the control unit 58 shown in FIG. 3, which can be mounted on each offset printing machine by means of a mounting bar 56, which is bevelled at the top, comprises in Substantially alternately pivoting eccentric 62 and bearing jaws 64 on at least one bearing pin 60.
  • the bearing pin (s) 60 are arranged coaxially on a longitudinal axis L running parallel to the duct axis A.
  • the bearing bolts 60 are formed separately for each eccentric 62.
  • a bearing pin 60 can also extend over several bearing jaws 64 or over the entire length of the control unit 58.
  • the bearing jaws 64 are individually screwed to the mounting bar 56, a countersunk screw 66 is visible in FIG. 3.
  • Each bearing jaw comprises a threaded bore 68 for a screw for fixing the bearing bolt 60.
  • the bearing jaws 64 are 32 mm apart, measured from center to center.
  • the width of the standard eccentric 62 is 28 mm.
  • a washer 70 of 2 mm thickness is inserted on both sides. The positioning eccentric 62 can thus be pivoted practically without play.
  • the circumferential surface 72 of the actuating eccentric 62 is stepped on both sides, whereby a groove 74 is created in each case.
  • the gradations are shown in FIGS. 6 and 7 in detail.
  • a sliding piece 90 is placed on the peripheral surface 72.
  • a rounded cover plate 76 is drawn, which has rectangular opening slots (77 in Fig. 4) for the actuating lever 78 of the eccentric.
  • a scale from 0 to 35 is printed or applied next to each opening slot, with which the setting levers 78 can be pivoted into a predetermined position in a self-locking manner.
  • FIG. 4 shows the lower region of a color box 10 with the color knife 14.
  • a control unit 58 is fastened to the ink fountain 10 via the mounting bar 56. This is done by means of countersunk screws 82 arranged at regular intervals.
  • the bearing jaws 64 are fastened to the mounting bar 56 with one screw 66 each.
  • a square profile 86 is inserted into a corresponding groove in the mounting bar 56 and bearing jaws 64, which prevents the bearing jaws 64 from rotating.
  • a bottom plate 88 projecting on one side is screwed onto bearing jaws 64 at regular intervals.
  • Mounting strip 56, bearing jaws 64 and the protruding base plate 88 form a groove with a rectangular cross section, into which sliding pieces 90 are fitted. These lie on the peripheral surface 72 of the eccentric 62.
  • the eccentric 62 is drawn in the uppermost position and indicated in the lowest position.
  • the slider is displaced in the direction of the longitudinal axis S of a plunger 92 anchored in the slider.
  • This plunger 92 is mounted in a stepped bore 84 in the ink fountain 10 and lies with the slightly rounded front end 94 in the area of the knife edge 36 on the ink knife 14.
  • the slider 90 has a bore 96 with an internal thread 95, into which an external thread 114 of the plunger 92 is screwed.
  • a hexagon 97 of the plunger 92 which is easily accessible from the outside, permits problem-free turning and thus a finely tuned and precise length adjustment of the plunger 92.
  • the hexagon 96 can be replaced by analog means, for example radial bores in the outer jacket, into which a pin can be inserted.
  • a plastic screw 98 acting directly on the external thread 114 of the plunger 92 fixes it.
  • the plunger 92 is only adjusted at larger intervals, the continuous distance control is carried out with the adjusting eccentric 62.
  • the plunger is always pressed in the direction of the slider 90 by means of a spring 100.
  • the spring 100 is supported at one end on a step 103 in the bore 84 and at the other end on a snap ring 104.
  • the adjusting eccentric 62 shown in FIGS. 5 to 7 has a bore 102 angled with respect to the adjusting lever 78 for receiving means for forming a self-locking device (FIG. 5).
  • a disk-shaped brake element 106 is inserted into this bore 102, which, after a screw 108 has been screwed in, is pressed by the force of a spring 110 onto the fixed bearing pin 60 and the aforementioned adjustable self-locking is effected.
  • the curved circumferential surface 72 of the positioning eccentric 62 which is produced with the highest precision, can be seen from FIG.
  • the distance a of the circumferential surface 72 from the axis L is greatest on the longitudinal center plane M of the actuating lever 78, on which the longitudinal axis L of the bearing pin 60 is preferably located.
  • This distance a gradually decreases over an angle ⁇ or ⁇ , for example by a total of 0.3 mm. In other words, the distance a initially decreases slowly in the area of the longitudinal center plane M, then progressively faster.
  • a plunger 92 is shown in FIG. 8, the acting spring (100 in FIG. 4) being omitted.
  • the front end 94 is rounded with a radius of, for example, 1-1.5 mm. This rounding is on the color knife (14 in Fig. 4).
  • the yoke ring 104 supporting the spring, not shown, is inserted.
  • an external thread 114 begins to be screwed into a slide 90.
  • FIGS. 9, 10 The sliding piece 90 with the bore 96 for the plunger 92 (FIG. 8) and a further bore 116 arranged perpendicularly thereto for the locking screw 98 (FIG. 4) is shown in FIGS. 9, 10.
  • a continuous groove 118 can also be seen from these figures, which is used to accommodate the peripheral surface 72 of the positioning eccentric 62 (FIGS. 5-7).
  • the plunger held in the slider 90 is also fixed in the direction of the longitudinal axis L (FIG. 3).
  • the slider 90 can only move in the direction of the longitudinal axis S of the plunger 92 (FIG. 8). In the other two directions it is fixed practically without play.
  • the bearing jaw 64 shown in FIGS. 11, 12 also has a continuous groove 120 into which the square profile 86 (FIG. 4) is inserted.
  • a continuous bore 122 serves to receive bearing bolts 60 (FIG. 4). These are fixed via a screw inserted into the threaded bore 68. Finally, the threaded bore 124 for the screw 66 is drawn in, which is used to screw the bearing jaw to the mounting bar 56 (FIGS. 3, 4).

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Screen Printers (AREA)
EP95810078A 1994-02-15 1995-02-06 Régleur excentrique dans un mécanisme de commande pour l'alimentation en encre d'une machine à imprimer en offset Expired - Lifetime EP0667238B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH443/94 1994-02-15
CH44394A CH686356A5 (de) 1994-02-15 1994-02-15 Steuervorrichtung fuer die Farbzufuhr an einer Offsetdruckmaschine.

Publications (2)

Publication Number Publication Date
EP0667238A1 true EP0667238A1 (fr) 1995-08-16
EP0667238B1 EP0667238B1 (fr) 1997-12-29

Family

ID=4187146

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95810078A Expired - Lifetime EP0667238B1 (fr) 1994-02-15 1995-02-06 Régleur excentrique dans un mécanisme de commande pour l'alimentation en encre d'une machine à imprimer en offset

Country Status (6)

Country Link
US (1) US5694851A (fr)
EP (1) EP0667238B1 (fr)
AT (1) ATE161476T1 (fr)
CH (1) CH686356A5 (fr)
DE (1) DE59501136D1 (fr)
ES (1) ES2113168T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998013202A3 (fr) * 1996-09-25 1998-06-18 Patric Albiez Unite vis de reglage d'encrier pour spatule d'encrier dans une presse a imprimer
WO2002016138A1 (fr) * 2000-08-23 2002-02-28 Cti-Systems Gmbh Modules constitues de lamelles de colorimetre modulaire et de sections de traverse
WO2004113077A1 (fr) 2003-06-20 2004-12-29 Ap Maschinen Ag Dispositif de dosage pour encrier
CN102729609A (zh) * 2011-03-31 2012-10-17 海德堡印刷机械股份公司 用于定位和锁止刮刀式墨斗的装置

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2896894B1 (ja) * 1998-05-15 1999-05-31 株式会社東京機械製作所 ドクターブレード装置
EP1034926B1 (fr) * 1999-03-11 2003-10-08 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif de lames d'encrier segmenté dans un appareil d'alimentation d'encre
US6612238B2 (en) * 2000-04-26 2003-09-02 Heidelberger Druckmaschinen Ag Inking unit in a printing machine
US6561092B1 (en) * 2000-09-22 2003-05-13 Steven R. Surbrook Ink flow adjustment device for printing presses
US6802255B2 (en) 2002-12-09 2004-10-12 Color Control Corp. Ink fountain mechanism
US7178461B2 (en) * 2002-12-09 2007-02-20 Color Control Corp. Ink fountain assembly with non-tilt cheeks and liner replacement mechanism
US7194955B1 (en) * 2005-09-08 2007-03-27 Clark James R Printing press ink fountain adjustment system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2550720A1 (de) * 1975-11-12 1977-06-02 Roland Offsetmaschf Dosiervorrichtung an einem farbkasten
GB2056373A (en) * 1979-08-11 1981-03-18 Chambon Machines Device for adjusting an inking assembly
JPS58173662A (ja) * 1982-04-05 1983-10-12 Komori Printing Mach Co Ltd 印刷機のインキ壷装置
WO1994019194A1 (fr) * 1993-02-24 1994-09-01 Sarda Jean Lucien Distributeur d'encre pour presses d'imprimerie

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2550720A1 (de) * 1975-11-12 1977-06-02 Roland Offsetmaschf Dosiervorrichtung an einem farbkasten
GB2056373A (en) * 1979-08-11 1981-03-18 Chambon Machines Device for adjusting an inking assembly
JPS58173662A (ja) * 1982-04-05 1983-10-12 Komori Printing Mach Co Ltd 印刷機のインキ壷装置
WO1994019194A1 (fr) * 1993-02-24 1994-09-01 Sarda Jean Lucien Distributeur d'encre pour presses d'imprimerie

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 8, no. 12 (M - 269)<1449> 19 January 1984 (1984-01-19) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998013202A3 (fr) * 1996-09-25 1998-06-18 Patric Albiez Unite vis de reglage d'encrier pour spatule d'encrier dans une presse a imprimer
US6112661A (en) * 1996-09-25 2000-09-05 Albiez; Patric Ink knife duct-adjusting screw unit for an ink fountain in a printing press
WO2002016138A1 (fr) * 2000-08-23 2002-02-28 Cti-Systems Gmbh Modules constitues de lamelles de colorimetre modulaire et de sections de traverse
WO2004113077A1 (fr) 2003-06-20 2004-12-29 Ap Maschinen Ag Dispositif de dosage pour encrier
CN102729609A (zh) * 2011-03-31 2012-10-17 海德堡印刷机械股份公司 用于定位和锁止刮刀式墨斗的装置
CN102729609B (zh) * 2011-03-31 2016-05-25 海德堡印刷机械股份公司 用于定位和锁止刮刀式墨斗的装置

Also Published As

Publication number Publication date
EP0667238B1 (fr) 1997-12-29
CH686356A5 (de) 1996-03-15
DE59501136D1 (de) 1998-02-05
US5694851A (en) 1997-12-09
ES2113168T3 (es) 1998-04-16
ATE161476T1 (de) 1998-01-15

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