EP0446668A1 - Dispositif de nettoyage pour une machine d'impression - Google Patents

Dispositif de nettoyage pour une machine d'impression Download PDF

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Publication number
EP0446668A1
EP0446668A1 EP91102399A EP91102399A EP0446668A1 EP 0446668 A1 EP0446668 A1 EP 0446668A1 EP 91102399 A EP91102399 A EP 91102399A EP 91102399 A EP91102399 A EP 91102399A EP 0446668 A1 EP0446668 A1 EP 0446668A1
Authority
EP
European Patent Office
Prior art keywords
membrane
cleaning
cleaning cloth
cloth web
web
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
EP91102399A
Other languages
German (de)
English (en)
Other versions
EP0446668B1 (fr
Inventor
Gerhard Loos
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger 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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0446668A1 publication Critical patent/EP0446668A1/fr
Application granted granted Critical
Publication of EP0446668B1 publication Critical patent/EP0446668B1/fr
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
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/06—Cleaning arrangements or devices for offset cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/10—Cleaning characterised by the methods or devices
    • B41P2235/20—Wiping devices
    • B41P2235/24—Wiping devices using rolls of cleaning cloth
    • B41P2235/246—Pressing the cleaning cloth against the cylinder

Definitions

  • the invention relates to a cleaning device for a printing press for cleaning a rotating outer surface of a roller or a cylinder, for example for cleaning a rubber blanket of a blanket cylinder of an offset printing machine, by means of a cleaning cloth web with web edges running perpendicular to the surface lines of the outer surface, a membrane being provided in their one-sided application by means of a pressurized fluid presses a section of the cleaning cloth web against the outer surface.
  • Such a cleaning device is known, for example, from FIG. 6 of patent application EP-A2 0 299 193 and the associated description.
  • a pressure chamber is provided for one-sided loading of the membrane by means of a pressurized fluid, in which a chamber wall is formed by the membrane.
  • a cleaning cloth web runs between the outer surface of a rubber blanket stretched on a blanket cylinder of an offset printing press and a surface of the membrane facing the outer surface.
  • the width of the cleaning cloth web is chosen to be somewhat larger than the useful width achievable with the offset printing machine. This measure creates a first prerequisite for the outer surface being able to be cleaned in an area which is somewhat wider than the useful width, so that cleaning across the entire useful width is actually possible.
  • the cleaning cloth web must also be pressed against the lateral surface over such a width that the pressed-on area of the cleaning cloth web is somewhat wider than the useful width.
  • the membrane In order to ensure a certain minimum value of a pressing force of the cleaning cloth web on the outer surface over the entire useful width, the membrane must be bulged by means of the pressurized fluid in such a way that the membrane also exerts a pressing force on the edges of the cleaning cloth web that has a certain minimum value . With sufficient certainty, however, this can only be achieved in that the extension of the membrane in the direction transverse to the cleaning cloth web extends beyond the width of the cleaning cloth web. However, in each case an end region of the membrane lying outside the cleaning cloth web presses it with a certain force against the outer surface. The membrane may be damaged at its end areas.
  • the invention is based on the object of enabling an inexpensive and low-wear operation of a generic cleaning device.
  • the membrane in such a way that it has a raised first surface area adapted to the width of the cleaning cloth web that can be contacted with the cleaning cloth web, and second surface areas of a surface of the membrane facing the cleaning cloth web that are offset by means of a recessed step, can be achieved that the one-sided by of a pressurized fluid membrane does not come into contact with the jacket surface at any point.
  • the raised surface area of the membrane is dimensioned and arranged so that it extends in a direction transverse to the cleaning cloth web between the web edges of the cleaning cloth web and has a slightly smaller width than the cleaning cloth web.
  • Surface areas of the membrane which are offset by the step and lie outside the width of the raised surface area then do not come into contact with the cleaning cloth web, let alone with the outer surface. This prevents damage that can occur due to friction between the membrane and the rotating surface.
  • An embodiment according to the invention is characterized in that the step is formed in a region of the membrane facing the cleaning cloth web while maintaining an essentially uniform wall thickness of a membrane consisting of rubber-elastic material.
  • a necessary installation space for the cleaning device, which extends in the transverse direction to the cleaning cloth web, is therefore not significantly larger than the width of the cleaning cloth web, so that space-saving installation is possible.
  • the favorable installation conditions are due to the deformation behavior of the membrane in its end areas, which allow greater curvature thanks to the smaller wall thickness.
  • the membranes used for the cleaning devices mentioned at the outset usually have an elongated shape, the longitudinal extent being dependent on the width of use already mentioned. If a corresponding pressure chamber is now closed by means of such a membrane and a fluid under pressure is introduced into the pressure chamber, this results in known membranes (as for example in FIG. 6 of patent application EP-A2 0 299 193) in successive imaginary cuts in the longitudinal direction vertical planes, particularly in the vicinity of the narrow sides of the membrane, have relatively large differences in the contour of the membrane surface facing the cleaning cloth web. When using such membranes in a generic cleaning device, this results in a difficult to predict of several factors (such as pressure of the fluid, even under the conditions of the same geometry and the same installation conditions).
  • first body edges formed by means of the step of a region forming the raised first surface area of a membrane consisting of rubber-elastic material run parallel to the web edges of the cleaning cloth web and laterally delimit a central area of the raised first surface area, the first body edges lie at a slight distance from a respective web edge of the cleaning cloth web between the web edges of the cleaning cloth web, and that at each end of a respective first body edge there is a second body edge of the region of the membrane forming the raised first surface area, the second body edges each laterally delimit an edge area of the raised first surface area adjoining the central area of the raised first surface area, and a respective ilig edge area is noticeably narrower than the cleaning cloth web at least at a noticeable distance from the central area.
  • the measure thus proposed for shaping the edge regions adjoining the central region of the raised first surface region has a favorable effect in this regard on keeping the membrane from deforming under the pressure of the Fluids out, as hereby the above-mentioned differences in the contour of the membrane surface facing the cleaning cloth web in successive imaginary cuts in planes perpendicular to the longitudinal extension of the membrane within the area of the membrane forming the raised first surface area in the direction of the first laterally delimiting the raised first surface area As far as possible, avoid body edges. It can thus be achieved that the section of the cleaning cloth web pressed against the lateral surface tapers at most insignificantly as seen towards the web edges of the cleaning cloth web.
  • An optimal course of the second body edges can be determined, for example, by tests, different outlines of edge areas of the raised first surface area being achievable, for example, by appropriate removal of the material forming the membrane. The removal can take place, for example, by grinding.
  • a lateral surface 1 for example a blanket cylinder of an offset printing press
  • a cleaning device 2 of the generic type on the other hand.
  • a frame part 3 of a pair of frames a cleaning cloth web 4
  • a coil 5 receiving the cleaning cloth web 4 with a coil core 6, which is carried by a frame part 3 of the pair of frames
  • a membrane 7, which is between them itself and a tensioning rail 8 forms a pressure chamber 9
  • a profiled cross member 10 carried by a frame part 3, in which two opposite edges of the membrane 7 between respective sealing surfaces of the cross member 10 on the one hand and the tensioning rail 9 on the other hand are tightly clamped
  • a tensioning screw 11 for sealing clamping of the edges of the membrane 7 mentioned.
  • the membrane 7, the tensioning rail 8 and the cross member 10 each have an elongated shape, of which a cross section can be seen in the illustration shown.
  • the membrane 7 is further narrow
  • the membrane 7 is pressurized on one side by means of a pressurized fluid and presses a section of the cleaning cloth web 4 against the outer surface 1.
  • the pressurized fluid is introduced into the pressure chamber 9 through a pressure line 12 and a screw connection 13 screwed into an inlet bore of the tensioning rail 8.
  • a membrane 7 according to the invention made of rubber-elastic material is shown detached from the cleaning device described above in an appropriate position in relation to the cleaning cloth web 4 to the cleaning cloth web 4 shown in broken lines. In this illustration, the cleaning cloth web 4 runs above the membrane 7.
  • the surface of the membrane 7 facing the cleaning cloth web 4 has a raised first surface area, designated overall by 16, which can be contacted with the latter, at least in the event of a bulging of the membrane 7 in the direction of the cleaning cloth web 4, and second surface areas 18.1 and 18.2, which are formed by means of a recessed step 17 are offset from the first surface area 16.
  • the sublime first Surface area 16 extends between first body edges 19.1 and 19.2, which are formed by means of step 17 and are parallel to web edges 14 and 15, over a length which is somewhat greater than the useful width mentioned at the outset.
  • the web edges 14 and 15 of the cleaning cloth web 4 protrude by a respective distance 20 beyond the length of the raised first surface area 16.
  • the membrane 7 is pressed against the outer surface 1 with a corresponding bulge under the pressure of a fluid introduced into the pressure chamber 9, the cleaning cloth web 4 to a width defined by the first body edges 19.1 and 19.2.
  • the second surface areas 18.1 and 18.2 which are offset by the step 17 do not come into contact with the lateral surface 1.
  • they have the effect that a curvature of the raised first surface area 16 in the longitudinal direction of the elongated membrane 7 resulting from the bulging of the membrane 7 under the pressure of the fluid is also reduced to extremely small values in the vicinity of the first body edges 19.1 and 19.2. This results in a curvature of the membrane 7 caused by the pressure of the fluid in its longitudinal direction mainly in the areas of the membrane 7 forming the stepped surface areas 18.1 and 18.2.
  • a respective first body edge 19.1 and 19.2 formed by means of the step 17 represents a respective lateral boundary of a central region 16.1 of the raised first surface region 16, while a respective end of a respective first body edge 19.1 and 19.2 each connects a second body edge 19.1 ', 19.1''and19.2', 19.2 ''.
  • the second body edges 19.1 'and 19.2' form a lateral boundary of a first edge area 16.2 and the second body edges 19.1 ′′ and 19.2 ′′ a lateral boundary of a second edge region 16.3 of the raised first surface region 16, the first edge region 16.2 and the second edge region 16.3 each adjoining the central region 16.1.
  • An angle ⁇ enclosed between a first body edge 19.1 or 19.2 and a second body edge 19.1 ', 19.1''or19.2', 19.2 '' can also be adapted to the respective requirements. In extreme cases it can be provided that the raised first surface area has a step 17 all around.
  • the step 17 is formed while maintaining an essentially uniform wall thickness of the membrane 7 in an area of the membrane 7 facing the cleaning cloth web 4, while in the case of such a membrane 7 ′ according to FIG areas of the membrane 7 'which are offset from the surface areas 18.1, 18.2 (18.2 not shown here) have a smaller wall thickness by the height of the step 17 have as a region of the membrane 7 'which forms the raised first surface region 16.
  • the easier deformability of the offset surface areas 18.1 and 18.2 in an embodiment according to FIG. 5 compared to an embodiment according to FIG. 4 means that, with the same contours of the raised first surface area 16 and the same width of the cleaning cloth web 4, the membrane 7 'extends less transversely to Cleaning cloth web 4 is required.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP91102399A 1990-03-15 1991-02-20 Dispositif de nettoyage pour une machine d'impression Expired - Lifetime EP0446668B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4008159 1990-03-15
DE4008159A DE4008159A1 (de) 1990-03-15 1990-03-15 Reinigungseinrichtung fuer eine druckmaschine

Publications (2)

Publication Number Publication Date
EP0446668A1 true EP0446668A1 (fr) 1991-09-18
EP0446668B1 EP0446668B1 (fr) 1994-07-06

Family

ID=6402184

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91102399A Expired - Lifetime EP0446668B1 (fr) 1990-03-15 1991-02-20 Dispositif de nettoyage pour une machine d'impression

Country Status (5)

Country Link
US (1) US5123354A (fr)
EP (1) EP0446668B1 (fr)
JP (1) JP2525515B2 (fr)
AT (1) ATE108135T1 (fr)
DE (1) DE4008159A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0636476A1 (fr) * 1993-07-27 1995-02-01 ELETTRA S.r.l. Dispositif pour nettoyer les cylindres blanchets d'une machine à imprimer
DE19515721A1 (de) * 1995-05-03 1996-11-07 Heidelberger Druckmasch Ag Vorrichtung zur Reinigung von Zylinderoberflächen in Rotationsdruckmaschinen
EP0955164A1 (fr) * 1998-05-04 1999-11-10 MARQUIP, Inc. Dispositif d'alimentation en encre à changement rapide pour une imprimante

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4142422A1 (de) * 1991-12-20 1993-06-24 Baldwin Gegenheimer Gmbh Vorrichtung zum reinigen von zylindern einer rotationsdruckmaschine
US5568768A (en) * 1995-05-04 1996-10-29 Presstek, Inc. Cleaning apparatus for offset plates
DE19516422C2 (de) * 1995-05-04 1998-12-24 Bernd Dr Brenner Druckmaschine mit einer für einen Zylinder vorgesehenen Reinigungseinrichtung
US5584242A (en) * 1995-05-04 1996-12-17 Presstek, Inc. Clamp assembly for lithographic plates
DE19605957A1 (de) * 1996-02-17 1997-08-21 Heidelberger Druckmasch Ag Vorrichtung zum Reinigen der Mantelfläche von Zylindern in Rotationsdruckmaschinen
US6116160A (en) * 1998-03-13 2000-09-12 Iris Graphics, Inc. Printer drum
DE10000555A1 (de) * 2000-01-08 2001-07-12 Baldwin Grafotec Gmbh Waschbalken für Druckmaschinenzylinder
DE10000549A1 (de) * 2000-01-08 2001-07-12 Baldwin Grafotec Gmbh Waschbalken für Druckmaschinenzylinder
CN1628031A (zh) * 2002-05-08 2005-06-15 鲍德温格拉菲科系统公司 具有恒定接触区域的清洁胶印滚筒用囊
SE545301C2 (en) * 2021-09-14 2023-06-20 Primeblade Sweden Ab A combination of an ink reservoir and doctor blade assembly and a rotatable cylinder for a printing press

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0299193A2 (fr) * 1987-07-10 1989-01-18 Baldwin-Japan Ltd. Appareil de nettoyage pour machine d'impression
DE3909114A1 (de) * 1989-03-20 1990-09-27 Heidelberger Druckmasch Ag Wascheinrichtung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3788219A (en) * 1972-04-04 1974-01-29 Dick Co Ab Blade for scraping liquids from a relatively moving surface
US4344361A (en) * 1979-04-19 1982-08-17 Baldwin-Gegenheimer Corporation Automatic blanket cylinder cleaner
DE3309557A1 (de) * 1983-03-17 1984-09-27 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Rakel fuer eine walzenwaschvorrichtung
DD227927A1 (de) * 1984-11-02 1985-10-02 Polygraph Leipzig Vorrichtung zur reinigung eines zylinders einer druckmaschine
DD228215B1 (de) * 1984-11-08 1989-12-06 Polygraph Leipzig Spanneinrichtung an druckmittelbeaufschlagten gegendruckkoerpern, insbesondere in wascheinrichtungen fuer druckmaschinen
JPH01122438A (ja) * 1987-11-06 1989-05-15 B J Trading Kk シリンダ洗浄装置
DE8809032U1 (de) * 1988-07-14 1988-08-25 Baldwin-Gegenheimer GmbH, 8900 Augsburg Vorrichtung zur Reinigung eines Zylinders einer Druckmaschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0299193A2 (fr) * 1987-07-10 1989-01-18 Baldwin-Japan Ltd. Appareil de nettoyage pour machine d'impression
DE3909114A1 (de) * 1989-03-20 1990-09-27 Heidelberger Druckmasch Ag Wascheinrichtung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0636476A1 (fr) * 1993-07-27 1995-02-01 ELETTRA S.r.l. Dispositif pour nettoyer les cylindres blanchets d'une machine à imprimer
DE19515721A1 (de) * 1995-05-03 1996-11-07 Heidelberger Druckmasch Ag Vorrichtung zur Reinigung von Zylinderoberflächen in Rotationsdruckmaschinen
US5762000A (en) * 1995-05-03 1998-06-09 Heidelberger Druckmaschinen Ag Device for cleaning cylindrical surfaces in rotary printing presses
DE19515721C2 (de) * 1995-05-03 2000-02-03 Heidelberger Druckmasch Ag Vorrichtung zur Reinigung von Zylinderoberflächen in Rotationsdruckmaschinen
EP0955164A1 (fr) * 1998-05-04 1999-11-10 MARQUIP, Inc. Dispositif d'alimentation en encre à changement rapide pour une imprimante

Also Published As

Publication number Publication date
EP0446668B1 (fr) 1994-07-06
ATE108135T1 (de) 1994-07-15
JP2525515B2 (ja) 1996-08-21
DE4008159C2 (fr) 1992-05-27
JPH04220346A (ja) 1992-08-11
US5123354A (en) 1992-06-23
DE4008159A1 (de) 1991-09-19

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