US3561357A - Water tray arrangement for the dampening unit of an offset printing machine - Google Patents

Water tray arrangement for the dampening unit of an offset printing machine Download PDF

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Publication number
US3561357A
US3561357A US707624A US3561357DA US3561357A US 3561357 A US3561357 A US 3561357A US 707624 A US707624 A US 707624A US 3561357D A US3561357D A US 3561357DA US 3561357 A US3561357 A US 3561357A
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US
United States
Prior art keywords
tray
compartment
tray member
machine
partition
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 - Lifetime
Application number
US707624A
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English (en)
Inventor
Heinz Joachim Schinke
Hermann Raible
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Bauerle Mathias GmbH
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Bauerle Mathias GmbH
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Filing date
Publication date
Application filed by Bauerle Mathias GmbH filed Critical Bauerle Mathias GmbH
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    • 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
    • B41F31/06—Troughs or like reservoirs with immersed or partly immersed, rollers or cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/20—Details
    • B41F7/24—Damping devices
    • B41F7/32—Ducts, containers, or like supply devices for liquids

Definitions

  • This invention relates to dampening units for offset printing machines, and particularly for office offset duplicating machines.
  • Offset machines of the type described are conventionally equipped with a fountain roller which dips into an acidulated aqueous dampening medium in a tray.
  • a liquid film is transferred by intermediate rollers from the normally driven fountain roller to an axially oscillating distributing roller, and thence to a master or plate fastened on a plate cylinder of the machine. If a single distributing roller is provided, it may also receive ink from an associated inking unit.
  • the object of the invention is a modification of the tray arrangement in an offset printing machine of the type described which makes it unnecessary to remove the dampening medium from the tray, yet avoids contamination of the liquid by dust in the atmosphere and other contaminants, and damage to the machine by vapors released by the medium.
  • the invention in one of its aspects, provides the dampening unit of an offset printing or duplicating machine with a tray in which two compartments are separated by a partition transverse to the bottom wall of the tray and having an aperture near the bottom wall which connects the compartments.
  • a cover which engages the partition and the tray seals one of the compartments.
  • the tray is mounted on the machine frame so that it can pivot between an operative and an inoperative position. In the operative position of the tray, the two compartments are horizontally offset from each other, and a fountain roller of the machine is partly received in the other compartment. In the inoperative position of the tray, the sealed compartment is downwardly offset from the other compartment.
  • FIG. I shows a tray arrangement of the invention in side elevation and partly in section, and other elements of an offset machine in a conventional manner, the tray being in the operative position;
  • FIG. 2 shows a portion of the apparatus of FIG. I with the tray in the inoperative position
  • FIG. 3 shows the device of FIG. 2 without its tray
  • FIG. 4 illustrates the tray removed from the apparatus of FIG. 3 in a perspective view on a larger scale.
  • a tray I is divided into two compartments la, Ib by an upright partition 1c.
  • the compartment la is upwardly sealed by a cover 1 f which projects horizontally beyond the partition lc so as partly to cover the otherwise open compartment lb.
  • the tray 1 stands on the top face of a supporting bracket 2 which is attached to the machine frame I6 by a horizontal pivot pin or shaft 3.
  • An abutment pin 4 which is parallel to the shaft 3 is horizontally slidable in a slot of the frame l6 and is partly received in a guide opening I3 of the bracket 2.
  • a spring I2 attached to the shaft 3 tends to draw the pin 4 horizontally into either one of two pockets I3 in a vertical wall of the opening 13, and thereby arrests the bracket 2 either in the operative position shown in FIG. I or the inoperative position illustrated in FIGS. 2 and 3.
  • a fountain roller 5 journaled in the frame I6 dips into water 15 held in the tray I when the latter is in the operative position shown in FIG. 1, but is removed from the water when the tray 1 is swung with the bracket 2 into the inoperative position shown in FIG. 2.
  • the roller 5 is rotated by the main drive of the machine in a conventional manner, not shown, to pick up a water film which is transferred by a ductor I7 to an axially oscillating distributing roller 8 in circumferential contact with an application roller 9 in the usual manner.
  • the ductor 17 moves back and forth between the fountain roller 5 and the distributing roller 8 as is indicated by a curved double arrow and conventional in itself.
  • Ink is simultaneously supplied to the distributing roller 8 from a reservoir 6 formed between a flexible steel blade 7 and one member of a train 18 of rollers, the last of the rollers I8 transferring an ink film to the distributor roller 8 so that ink and water are jointly applied by the application roller 9 to a paper plate or master (not shown) on a plate cylinder ID for transfer of an inked image to a blanket cylinder I I.
  • the bracket 2 When the machine is to be shut down, the bracket 2 is swung into the inoperative position shown in FIGS. 2 and 3, and the tray 1 is removed and positioned so that its bottom wall Id is upright and the partition Ic is horizontal, as shown in FIG. 4.
  • the entire water contained in the tray I is thereby drained into the sealed compartment Ia through an aperture 14 in the partition 10 near the bottom wall Id.
  • the height of the aperture 14 to its top edge 14a, as measured in the operative position of the tray 1, is smaller than the corresponding height of the circumferential wall 1e of the compartment lb so that the wall 12 extends over the opening I4 and prevents dust from falling into the water IS in the compartment Ih when the tray is in the position shown in FIG. 4.
  • a single charge of water IS in the tray I is normally sufficient for a days work, and may be replenished before again installing the tray in the machine.
  • the cover If which projects over the partition 1c forms a receptacle for the added liquid in the position of the tray illustrated in FIG. 4 until the water can pass through the aperture I4 into the compartment la.
  • the use of disposable trays supplied with a charge of water is contemplated, and such trays may be supplied with a seal over the aperture I4 that is broken prior to use, the tray being discarded when empty.
  • the dampening unit When the tray 1 containing water 15 is removed, the dampening unit may be cleaned in a simple manner by replacing the tray I with another, closely similar tray which contains a cleaning fluid.
  • the cleaning fluid is transferred to all operating surfaces of the inking and dampening unit when the machine is then run without ink.
  • the ink film is gradually washed from all rollers by the cleaning fluid and collected in the cleaning tray.
  • the cleaning operation may be accelerated by installing a special cleaning plate on the cylinder 10 in a manner known in itself.
  • the dampening unit including a tray arrangement adapted to hold a supply of fluid, a fountain roller arranged for partial immersion in a fluid held by said tray arrangement, and means for transferring fluid from said fountain roller to said plate cylinder, the improvement in the tray arrangement which comprises:
  • a tray member having a bottom wall
  • a partition separating two compartments in said tray member, said partition being transverse to said bottom wall and formed with an aperture near the bottom wall connecting said compartments.
  • mounting means releasably mounting said tray member on said frame for pivotal movement between an operative and in inoperative position
  • said compartments being horizontally ofl'set from each other, and said fountain roller being partly received in the liquid in the other one of said compartments when said liquid covers said aperture;
  • said mounting means including a support member and a pivot securing said support member to said frame for movement about a horizontally extending axis, said support member releasably supporting said tray member.
  • said mounting means further including abutment means for holding said support member in each of two positions angularly offset relative to said axis, said tray member being in said operative position and in said inoperative position respectively when said support member is in one of said two angularly offset positions.
  • said other compartment having a circumferential wall transverse of said bottom wall, the height of said circumferential wall transversely of said bottom wall being greater than the corresponding height of said aperture.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
US707624A 1967-04-17 1968-02-23 Water tray arrangement for the dampening unit of an offset printing machine Expired - Lifetime US3561357A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB0092103 1967-04-17

Publications (1)

Publication Number Publication Date
US3561357A true US3561357A (en) 1971-02-09

Family

ID=6986200

Family Applications (1)

Application Number Title Priority Date Filing Date
US707624A Expired - Lifetime US3561357A (en) 1967-04-17 1968-02-23 Water tray arrangement for the dampening unit of an offset printing machine

Country Status (4)

Country Link
US (1) US3561357A (de)
DE (1) DE1536961C2 (de)
GB (1) GB1179226A (de)
NL (1) NL6801932A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902417A (en) * 1972-04-29 1975-09-02 Maschf Augsburg Nuernberg Ag Wetting system for rotary offset printing presses
US3973516A (en) * 1975-01-14 1976-08-10 Minkow Julius M Dispensing tray for glue machine
US4397235A (en) * 1981-04-25 1983-08-09 Man-Roland Druckmaschinen Aktiengesellschaft Multi-printing mode rotary printing machine
US4589368A (en) * 1984-09-28 1986-05-20 Komori Printing Machinery Co., Ltd. Varnish coater for printed product
US5303649A (en) * 1991-08-13 1994-04-19 Koenig & Bauer Aktiengesellschaft Ink container

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3509030A1 (de) * 1985-03-13 1986-09-18 NORFIN Graphische Produkte GmbH, 3014 Hannover Fluidwanne
DE19949906A1 (de) * 1999-10-16 2001-04-19 Baldwin Grafotec Gmbh Druckmaschinen-Reinigungsvorrichtung

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1861142A (en) * 1931-04-14 1932-05-31 Scherrer Peter Apparatus for applying reducing agents to printing fountains
US1935731A (en) * 1932-06-25 1933-11-21 Edwin G Staude Adhesive applying mechanism
US2210567A (en) * 1937-01-26 1940-08-06 Ibm Striping means
DE867550C (de) * 1944-01-25 1953-02-19 Geha Werke Gmbh Anfeuchtvorrichtung fuer Spiegelschriftvervielfaeltiger
CH319962A (de) * 1953-11-18 1957-03-15 Winkler Fallert & Co Maschf Farbwerk für Buchdruck-, Offsetdruck- und dergleichen Maschinen für Farbendruck
US2876039A (en) * 1955-07-22 1959-03-03 Bahlsen Werner Apparatus for distributing pasty material
US2995084A (en) * 1957-07-04 1961-08-08 Aller Press As Damping device for offset printing machines
US3045592A (en) * 1959-05-28 1962-07-24 Smithe Machine Co Inc F L Liquid applicator
US3073240A (en) * 1959-02-25 1963-01-15 Miehle Goss Dexter Inc Ink supply arrangement for color printing
CA692385A (en) * 1964-08-11 Miehle-Goss-Dexter Ink fountain
US3145653A (en) * 1963-03-14 1964-08-25 Addressograph Multigraph Liquid supply system
US3283707A (en) * 1964-03-25 1966-11-08 Interchem Corp Apparatus for applying fountain solution in planographic printing
US3318238A (en) * 1964-10-16 1967-05-09 Gottscho Inc Adolph Ink fountain supply and drain means
US3405636A (en) * 1966-06-27 1968-10-15 Addressograph Multigraph Lithographic moisture supply

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE434122C (de) * 1924-12-25 1926-09-18 Schwarz Presse Akt Ges Fa Feuchtwerk fuer lithographische Druckmaschinen, insbesondere Rotationsdruckmaschinen
US2302490A (en) * 1941-06-11 1942-11-17 Addressograph Multigraph Cleaning device for ink rolls
AT171293B (de) * 1946-10-23 1952-05-10 Georg Kohlhauser Rotations-Umdruckvervielfältiger
US2516757A (en) * 1947-06-23 1950-07-25 Davidson Mfg Corp Dampening fountain for printing presses
US2689522A (en) * 1949-10-11 1954-09-21 Addressograph Multigraph Inking and moistening means for rotary planographic printing machines
AT184191B (de) * 1953-11-18 1955-12-27 Winkler Fallert & Co Maschf Farbwerk für Buchdruck-, Offset- u. dgl. Maschinen

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA692385A (en) * 1964-08-11 Miehle-Goss-Dexter Ink fountain
US1861142A (en) * 1931-04-14 1932-05-31 Scherrer Peter Apparatus for applying reducing agents to printing fountains
US1935731A (en) * 1932-06-25 1933-11-21 Edwin G Staude Adhesive applying mechanism
US2210567A (en) * 1937-01-26 1940-08-06 Ibm Striping means
DE867550C (de) * 1944-01-25 1953-02-19 Geha Werke Gmbh Anfeuchtvorrichtung fuer Spiegelschriftvervielfaeltiger
CH319962A (de) * 1953-11-18 1957-03-15 Winkler Fallert & Co Maschf Farbwerk für Buchdruck-, Offsetdruck- und dergleichen Maschinen für Farbendruck
US2876039A (en) * 1955-07-22 1959-03-03 Bahlsen Werner Apparatus for distributing pasty material
US2995084A (en) * 1957-07-04 1961-08-08 Aller Press As Damping device for offset printing machines
US3073240A (en) * 1959-02-25 1963-01-15 Miehle Goss Dexter Inc Ink supply arrangement for color printing
US3045592A (en) * 1959-05-28 1962-07-24 Smithe Machine Co Inc F L Liquid applicator
US3145653A (en) * 1963-03-14 1964-08-25 Addressograph Multigraph Liquid supply system
US3283707A (en) * 1964-03-25 1966-11-08 Interchem Corp Apparatus for applying fountain solution in planographic printing
US3318238A (en) * 1964-10-16 1967-05-09 Gottscho Inc Adolph Ink fountain supply and drain means
US3405636A (en) * 1966-06-27 1968-10-15 Addressograph Multigraph Lithographic moisture supply

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902417A (en) * 1972-04-29 1975-09-02 Maschf Augsburg Nuernberg Ag Wetting system for rotary offset printing presses
US3973516A (en) * 1975-01-14 1976-08-10 Minkow Julius M Dispensing tray for glue machine
US4397235A (en) * 1981-04-25 1983-08-09 Man-Roland Druckmaschinen Aktiengesellschaft Multi-printing mode rotary printing machine
US4589368A (en) * 1984-09-28 1986-05-20 Komori Printing Machinery Co., Ltd. Varnish coater for printed product
US5303649A (en) * 1991-08-13 1994-04-19 Koenig & Bauer Aktiengesellschaft Ink container

Also Published As

Publication number Publication date
DE1536961B1 (de) 1970-09-03
DE1536961C2 (de) 1975-08-28
NL6801932A (de) 1968-10-18
GB1179226A (en) 1970-01-28

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