US3656431A - Devices for cleaning wiping cylinders in a printing apparatus - Google Patents

Devices for cleaning wiping cylinders in a printing apparatus Download PDF

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Publication number
US3656431A
US3656431A US39608A US3656431DA US3656431A US 3656431 A US3656431 A US 3656431A US 39608 A US39608 A US 39608A US 3656431D A US3656431D A US 3656431DA US 3656431 A US3656431 A US 3656431A
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US
United States
Prior art keywords
wiping cylinder
scraper
periphery
printing apparatus
cylinder
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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
US39608A
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English (en)
Inventor
Gualtiero Giori
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.)
KBA Notasys SA
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De la Rue Giori SA
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Publication date
Application filed by De la Rue Giori SA filed Critical De la Rue Giori SA
Application granted granted Critical
Publication of US3656431A publication Critical patent/US3656431A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F9/00—Rotary intaglio printing presses
    • B41F9/06—Details
    • B41F9/08—Wiping mechanisms
    • B41F9/10—Doctors, scrapers, or like devices
    • B41F9/1018—Doctors, scrapers, or like devices using a wiping cylinder

Definitions

  • a device for cleaning a rotatable wiping cylinder of a printing apparatus comprises a receptacle for cleaning fluid adapted to operatively receive a portion of the periphery of the wiping cylinder, and a scraper mounted for movement between a first position in which it engages the periphery of the wiping cylinder and a second position in which it is spaced from the periphery of the wiping cylinder.
  • a plurality of scrapers and a brush are provided downstream of the scraper in the direction of rotation of the wiping cylinder for engaging the periphery of the wiping cylinder.
  • the present invention relates to printing apparatus, and in particular to devices for cleaning rotatable wiping cylinders of printing apparatus for copper-plate printing in at least one color.
  • Printing apparatus comprising at least one revolving brush applied at a predetermined'point to the wiping cylinder within the damping zone, a scraper placed downstream of the damping zone, in the direction of the rotation of the wiping cylinder and downstream of the scraper, a system of nozzles, spraying water onto the surface of the wiping cylinder, as well as a supplementary scraper to remove the film of water from the surface of the wiping cylinder.
  • This known apparatus permits the use of an aqueous solution which includes an alkaline washing ingredient, a cleaning agent well known in the trade, with a base of alkaline phosphate and a wetting agent.
  • the scraper which takes off the greater part of the ink on the rim of the wiping cylinder, before the damping zone, is very strongly pressed against the wiping cylinder and there is a risk than when the wiping cylinder closes to rotate, that the edge of the scraper will penetrate the cylinder surface, which is usually made of synthetic material, and make the cylinder unusable.
  • the invention is based on this problem; to remedy the aforementioned drawbacks, inherent with a scraper statically mounted in front of the damping zone of the wiping cylinder, and to provide a simple device which is more economical than those of cleaning systems fitted with rotating brushes,and which at the same time benefits from advantages which are brought about by the use of a first scraper, mounted upstream in the direction of the rotation of the wiping cylinder relative to cleaning means which scraper mechanically takes off the greater part of the ink on the periphery of the cylinder.
  • a preferred embodiment of the invention minimizes the too fine dispersion of the ink volume in the cleaning liquid which can, as a result, be used for a longer time without being replaced.
  • a device for cleaning a rotatable wiping cylinder of a printing apparatus comprises a receptacle for cleaning fluid, and a scraper mounted for move ment between first and second positions, the device being so arranged that when operatively combined with the wiping cylinder, the receptacle receives a portion of the wiping cylinder, and the scraper engages the periphery of the wiping cylinder when in its first position and is spaced from the wiping cylinder when in its second position.
  • the scraper which may be made from sheet steel, may be placed before or within the damping zone of the wiping cylinder. It removes the ink from the wiping cylinder in large shavings like swarf, and because of its position in, for example, the damping zone, the cleaning fluid in the receptacle serves as a complementary lubricant and cooling fluid.
  • the volume of ink so removed remains in one piece, Le, a shaving, it sinks rapidly to the bottom of the receptacle, without substantially effecting the next cleaning process, such that, if brushes are used, these only become dirty very slowly.
  • FIG. 1 is a partly sectional side elevation of a device for cleaning a rotatable wiping cylinder of a printing apparatus
  • FIG. 2 is an enlarged detail of FIG. 1.
  • a wiping cylinder 1 of a printing apparatus for copper-plate printing in one or several colours is rotatable about position in a sense indicated by arrow F1, and contacts at its periphery the periphery of a plate cylinder 2 provided with a printing plate.
  • the lower portion of the periphery of wiping cylinder 1 is received in a receptacle 3 filled with a known aqueous alkaline cleaning liquid.
  • two elongated, arcuate rails 4 Adjacent the two opposed side walls of receptacle 3, facing the sides of wiping cylinder 1, two elongated, arcuate rails 4 (only one shown) are co-axially positioned with respect to wiping cylinder 1, and mounted on guide means in the form of guide rollers 7. Rollers 7 are rotatably mounted on the opposed side walls to permit the rails 4 to slide along an arcuate path substantially co-axial with the wiping cylinder 1.
  • Each rail 4 has attached to its left hand end, as seen in FIG. 1, a rack rail 5 having gear teeth which co-operate with the teeth of a pinion 6 mounted on an operating shaft 6a.
  • a plurality of spiral springs 12 to are each attached at one end to a rail 4 by means of pins 8 to 11. At its opposite end, each spring 12 to 15 is pivotally connected by means of a pin 16 to 19 to an operating arm 20 to 23. As shown, the springs are arranged to lay generally in the lengthwise direction of the rail.
  • Each operating arm 20 to 23 is connected adjacent one end, to a support shaft 27 to arranged parallel to the rotational axis of the wiping cylinder 1.
  • Each support shaft is mounted at each end in a semi-circular groove in a support plate 48, the groove being open in the direction facing the periphery of the wiping cylinder.
  • the support plates 48 (only one shown) are fixed to the opposed side walls of receptacle 3.
  • Scraper support members 24 to 26' are mounted on shafts 28 to 30 respectively.
  • the scrapers are each made of rubber 33 to 35 mounted on a stiffening plate of sheet steel or iron 33a to 35a.
  • a brush support 31 fitted with a brush 32 is mounted on shaft 27.
  • the bristle head of brush 32 is detachable, for example, by means of a screw, and is fitted to support 31 so that the bristle head can be replaced without dismantling support 31 or the shaft 27.
  • the scrapers 33 to 35 and brush 32 extend over the full width of the periphery of wiping cylinder 1 and bear against the periphery at a predetermined pressure.
  • the pressure at which the scrapers 33 to 35 and brush 32 engage the periphery is adjustable by slidably moving the rails 4.
  • a screw mechanism (not shown) is turned outside the receptacle 3, rotation of which turns shaft 6a and pinion 6 which engages the gear teeth of ratchet rails to move rails 4 in a counter-clockwise sense (as seen in FIG. 1).
  • the support shafts 27 to 30 are rotated in a counter-clockwise sense taking with them support members 24 to 26 and 31, so that scrapers 33 to and brush 32 are moved away from the periphery of the wiper cylinder 1.
  • scrapers 33 to 35 in their working positions, form different acute angles with the periphery ofthe wiping cylinders 1.
  • the operating relay on the hydraulic adjusting device can also be coupled with an electric circuit for driving the wiping cylinder 1 and the printing machine, in such a way that when the wiping cylinder stops rotating, an automatic control for the piston 43 intervenes to lift off the scraper 36 and, when the wiping cylinder 1 is again rotated scraper 36 is moved to engage the periphery position. In this way when the wiping cylinder 1 is stopped, scraper 36, is prevented from exerting a pressure and penetrating into the material from which the wiping cylinder 1 is made.
  • TEFLON registered Trademark polyetrafluorethylene
  • the first scraper 36 enables practically the total mount of ink to be lifted from the surface of the wiping cylinder 1, this volume of ink being thus peeled off in large shavings and quickly falling to the bottom of the receptacle 3.
  • a sprinkling of water on the surface of the wiping cylinder 1 may be provided, whereafter the film of water can be removed by another scraper, or by a felt wiper. Jets may be used to dampen the wiping cylinder 1 above receptacle 3 with the new cleaning solution, in which case it is not necessary that the wiping cylinder 1 is immersed in a bath of liquid contained in the receptacle 3.
  • the ink removed by this scraper can be collected in a reservoir, this practice increasing the economy for monochrome printing where the ink is not mixed with several colours.
  • an improvement which comprises a scraper mounted for movement between a first position for engaging the periphery of the wiping cylinder and a second position in which it is spaced from the periphery of the wiping cylinder, a plurality of secondary scrapers arranged downstream of the main scraper in the direction of rotation of the wiping cylinder, the secondary scrapers being spaced from each other and engaging the periphery of the wiping cylinder, means being provided whereby the pressure with which each of said secondary scrapers engages the periphery of the wiping cylinder is adjustable by altering the angular position of each scraper with respect to the periphery of the wiping cylinder, and wherein a support assembly is provided for the secondary scrapers, the support assembly including a plurality ofsupport members on which the respective secondary scrapers are mounted,
  • a printing apparatus as claimed in claim 1 in which two said support assemblies are provided one adjacent each side surface of the wiping cylinder, and including an operating shaft connected between said two support assemblies for controlling said sliding movement of the rails.
  • a printing apparatus as claimed in claim 2 further comprising a pinion mounted on said operating shaft, and in which gear teeth are provided on each rail for co-operating with said pinion mounted on the operating shaft.
US39608A 1969-05-23 1970-05-22 Devices for cleaning wiping cylinders in a printing apparatus Expired - Lifetime US3656431A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH790069A CH487738A (de) 1969-05-23 1969-05-23 Einrichtung zur kontinuierlichen Reinigung eines Wischzylinders in Ein- oder Mehrfarben-Stahlstichdruckmaschinen

Publications (1)

Publication Number Publication Date
US3656431A true US3656431A (en) 1972-04-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
US39608A Expired - Lifetime US3656431A (en) 1969-05-23 1970-05-22 Devices for cleaning wiping cylinders in a printing apparatus

Country Status (10)

Country Link
US (1) US3656431A (de)
JP (1) JPS4923846B1 (de)
AT (1) AT317261B (de)
CA (1) CA920425A (de)
CH (1) CH487738A (de)
DE (1) DE2023951C3 (de)
FR (1) FR2043630A1 (de)
GB (1) GB1311762A (de)
SE (1) SE380475B (de)
SU (1) SU373929A3 (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3988988A (en) * 1975-04-21 1976-11-02 Addressograph Multigraph Corporation Device for drying the surface of a blanket cylinder of ink washing solvent
US4236450A (en) * 1976-09-17 1980-12-02 De La Rue Giori S.A. Installation for the continuous cleaning of a wiping roller of a machine for copper-plate printing
US4311094A (en) * 1979-03-12 1982-01-19 Ellison Lloyd W Method and apparatus for removing foreign matter from a printing press plate cylinder
US4499825A (en) * 1981-12-12 1985-02-19 Komori Printing Machinery Co., Ltd. Ink wiping device for intaglio rotary printing machines
US4893562A (en) * 1986-02-07 1990-01-16 Air Stamping, Inc. Bearer wiper assembly
US6129012A (en) * 1999-02-03 2000-10-10 Illinois Tool Works Inc. Ink cups for pad printing machines
EP1790473A1 (de) 2005-11-25 2007-05-30 Kba-Giori S.A. Verfahren zur Erfassung vom Eintreten von Druckfehlern auf Druckbogen während deren Bearbeitung in einer Druckmaschine
US20070175349A1 (en) * 2006-01-30 2007-08-02 Yukio Konaka Letterpress printing machine
US20080295724A1 (en) * 2005-11-25 2008-12-04 Volker Lohweg Method For Detection Of Occurrence Of Printing Errors On Printed Substrates During Processing Thereof On A Printing Press
US20090183644A1 (en) * 2006-04-11 2009-07-23 Kba-Giori S.A. Ink Wiping System For A Printing Machine
US20090266249A1 (en) * 2006-01-30 2009-10-29 De La Rue International Limited Intaglio Plate Wiping System
US20140150679A1 (en) * 2011-05-20 2014-06-05 Kba-Notasys Sa Ink wiping system for an intaglio printing press
US20140196620A1 (en) * 2011-05-20 2014-07-17 Kba-Notasys Sa Ink wiping system for an intaglio printing press

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55141780U (de) * 1979-03-24 1980-10-09
DE3433942C1 (de) * 1984-09-15 1985-09-19 Albert-Frankenthal Ag, 6710 Frankenthal Farbkasten fuer eine Rotationsdruckmaschine

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151969A (en) * 1938-06-09 1939-03-28 Standard Process Corp Inking apparatus and method
US2746387A (en) * 1950-11-07 1956-05-22 Rotographic Inc Rotary intaglio printing and embossing press
US2987993A (en) * 1956-08-24 1961-06-13 Giori Gualtiero Ink regulating device for intaglio and similar printing machines
US3016826A (en) * 1960-06-22 1962-01-16 Earl M Sage Printing press cleaning apparatus
US3026796A (en) * 1960-05-13 1962-03-27 Bird & Son Doctor blade assembly
US3063369A (en) * 1958-07-11 1962-11-13 Timson Ernest Arthur Rotary printing machines
BE648863A (de) * 1963-12-06 1964-10-01
US3408934A (en) * 1967-03-07 1968-11-05 Shelby M. Clausen Blanket cleaning attachment for offset presses

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151969A (en) * 1938-06-09 1939-03-28 Standard Process Corp Inking apparatus and method
US2746387A (en) * 1950-11-07 1956-05-22 Rotographic Inc Rotary intaglio printing and embossing press
US2987993A (en) * 1956-08-24 1961-06-13 Giori Gualtiero Ink regulating device for intaglio and similar printing machines
US3063369A (en) * 1958-07-11 1962-11-13 Timson Ernest Arthur Rotary printing machines
US3026796A (en) * 1960-05-13 1962-03-27 Bird & Son Doctor blade assembly
US3016826A (en) * 1960-06-22 1962-01-16 Earl M Sage Printing press cleaning apparatus
BE648863A (de) * 1963-12-06 1964-10-01
US3408934A (en) * 1967-03-07 1968-11-05 Shelby M. Clausen Blanket cleaning attachment for offset presses

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3988988A (en) * 1975-04-21 1976-11-02 Addressograph Multigraph Corporation Device for drying the surface of a blanket cylinder of ink washing solvent
US4236450A (en) * 1976-09-17 1980-12-02 De La Rue Giori S.A. Installation for the continuous cleaning of a wiping roller of a machine for copper-plate printing
US4311094A (en) * 1979-03-12 1982-01-19 Ellison Lloyd W Method and apparatus for removing foreign matter from a printing press plate cylinder
US4499825A (en) * 1981-12-12 1985-02-19 Komori Printing Machinery Co., Ltd. Ink wiping device for intaglio rotary printing machines
US4893562A (en) * 1986-02-07 1990-01-16 Air Stamping, Inc. Bearer wiper assembly
US6129012A (en) * 1999-02-03 2000-10-10 Illinois Tool Works Inc. Ink cups for pad printing machines
US20080295724A1 (en) * 2005-11-25 2008-12-04 Volker Lohweg Method For Detection Of Occurrence Of Printing Errors On Printed Substrates During Processing Thereof On A Printing Press
EP1790473A1 (de) 2005-11-25 2007-05-30 Kba-Giori S.A. Verfahren zur Erfassung vom Eintreten von Druckfehlern auf Druckbogen während deren Bearbeitung in einer Druckmaschine
US8613254B2 (en) 2005-11-25 2013-12-24 Kba-Notasys Sa Method for detection of occurrence of printing errors on printed substrates during processing thereof on a printing press
US20070175349A1 (en) * 2006-01-30 2007-08-02 Yukio Konaka Letterpress printing machine
US7546803B2 (en) * 2006-01-30 2009-06-16 Toppan Printing Co., Ltd. Letterpress printing machine
US20090217834A1 (en) * 2006-01-30 2009-09-03 Toppan Printing Co., Ltd. Letterpress Printing Machine
US20090266249A1 (en) * 2006-01-30 2009-10-29 De La Rue International Limited Intaglio Plate Wiping System
US20090183644A1 (en) * 2006-04-11 2009-07-23 Kba-Giori S.A. Ink Wiping System For A Printing Machine
US8516960B2 (en) * 2006-04-11 2013-08-27 Kba-Notasys Sa Ink wiping system for a printing machine
US20140150679A1 (en) * 2011-05-20 2014-06-05 Kba-Notasys Sa Ink wiping system for an intaglio printing press
US20140196620A1 (en) * 2011-05-20 2014-07-17 Kba-Notasys Sa Ink wiping system for an intaglio printing press
US9221242B2 (en) * 2011-05-20 2015-12-29 Kba-Notasys Sa Ink wiping system for an intaglio printing press
US9751296B2 (en) * 2011-05-20 2017-09-05 Kba-Notasys Sa Ink wiping system for an intaglio printing press

Also Published As

Publication number Publication date
GB1311762A (en) 1973-03-28
CA920425A (en) 1973-02-06
DE2023951B2 (de) 1974-08-08
CH487738A (de) 1970-03-31
SU373929A3 (de) 1973-03-12
JPS4923846B1 (de) 1974-06-19
SE380475B (sv) 1975-11-10
DE2023951A1 (de) 1970-11-26
DE2023951C3 (de) 1975-03-20
FR2043630A1 (de) 1971-02-19
AT317261B (de) 1974-08-26

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