US3922966A - Ink fountain in printing presses - Google Patents

Ink fountain in printing presses Download PDF

Info

Publication number
US3922966A
US3922966A US447752A US44775274A US3922966A US 3922966 A US3922966 A US 3922966A US 447752 A US447752 A US 447752A US 44775274 A US44775274 A US 44775274A US 3922966 A US3922966 A US 3922966A
Authority
US
United States
Prior art keywords
blade
ink
frame
fountain
closure plate
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
US447752A
Other languages
English (en)
Inventor
Janko Despot
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.)
Roland Offsetmaschinenfabrik Faber and Schleicher AG
Original Assignee
Roland Offsetmaschinenfabrik Faber and Schleicher 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 Roland Offsetmaschinenfabrik Faber and Schleicher AG filed Critical Roland Offsetmaschinenfabrik Faber and Schleicher AG
Application granted granted Critical
Publication of US3922966A publication Critical patent/US3922966A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

  • a clo- UNITED STATES PATENTS sure plate is provided on the frame for totally enclos- 1,724,075 8/1929 English l0l/365 ing the chamber to Prevent entry of P p dust and 1,862,744 6/1932 Fankboner U 101/3 5 ink either in liquid form or in the form of airborne 2,178,069 10/1939 Crafts 101/157 mist, the closure plate having a yieldable sealing con- 2,550,454 4/1951 Crafts et al.
  • ink fountain employs a fountain blade having a plurality of adjusting screws arranged at closely spaced intervals along its length for localized adjustment of the gap between the tip of the blade and the fountain roller, thereby to adjust the thickness of the film of ink deposited on the fountain roller.
  • the adjustment calls for a high degree of precision and reproducibility, with a portion of the blade closely following" movement of each screw in both directions without any lag or stickiness.
  • the general type of ink fountain to which the present invention is applicable includes a longitudinally extending frame having end members which journal the fountain roller together with means for driving the fountain roller at a low rate of speed. Since journaling in end members and driving are conventional and do not form a part of the present invention, such structure has, for simplicity, been omitted from the drawing.
  • the frame of the ink fountain includes a vertically extending wall portion 11 having, along its upper edge, a flat supporting surface 12. At the foot of the wall 11 is a generally horizontally extending base portion 13.
  • a fountain blade 15 which is held in place by screws or the like 16 and which has a longitudinally extending tip portion 17.
  • the tip of the blade is spaced closely adjacent the surface of the fountain roller 18.
  • a body of ink I Pocketed between the blade and the roller is a body of ink I, with the result that, as the roller turns, a film of ink 19 is formed on its surface.
  • such film is transferred to a series of ink rollers and drums (not shown), a portion of which are usually vibrated endwise, so that a thin and consistent film of ink reaches the form roller for transfer to the printing plate.
  • the base portion of the frame is laterally projecting and the blade is mounted overhangingly so that the blade and base portion define between them a longitudinally extending chamber.
  • the means for adjusting the blade spacing is mounted within this chamber, and the chamber is enclosed by a longitudinal closure plate, the lower edge of which is sealed to the frame and the upper edge of which is sealed by a strip of resilient material to the underside of the blade so that the chamber is tightly shielded against the entry of foreign material, either liquid or airborne, in all positions of adjustment of the blade.
  • an adjusting screw 20 is provided which penetrates the wall portion 11 of the frame with a snug fit, the tip 21 of the screw being located within the chamber with freedom for endwise movement.
  • an adjusting member in the form ofa crank 22 which is rockably swingable about a horizontal pin 23 supported in a bracket 24, the lower end 25 of the pin being captive in the tip of the screw.
  • the upper portion of the crank 22 is formed into a cam surface 26 which is engaged by a cam follower member 27 which is secured to the underside of the tip portion of the blade.
  • the profile of the cam 26 may vary over wide limits, the only requirement being that the cam surface be eccentric with respect to the pin axis to a degree and direction sufficient to provide the desired amount of throw of the blade within the range of movement of the adjusting screw.
  • the chamber defined by the overhanging blade and projecting base, and which is indicated by numeral 29, is enclosed by a closure plate 30 having an upper edge 31 and lower edge 32, it being understood that the closure plate is sufficiently long so as to extend into sealed engagement with the non-illustrated end members of the fountain frame.
  • a longitudinal mounting bar 35 is provided which is preferably coextensive with the closure plate and which abuts against mounting pads 36, to which the bar and closure plate are secured by appropriate screws 37.
  • the bar 35 is sealed tightly and continuously to the base 13.
  • a resilient sealing strip is interposed between the upper edge of the closure plate and the tip of the blade so as to maintain an impervious seal between the closure plate and the blade throughout the range of movement of the blade. More specifically, there is interposed between the blade a resilient strip of elastomeric material, such as rubber, which may be vulcanized to the closure plate and which has sufficient resiliency to yieldingly accommodate movement of the blade, without breaking the seal, even though the closure plate is stationarily anchored along its lower edge.
  • the strip of elastomeric material, indicated at 40 is mounted in a relatively wide longitudinal groove 41 formed in the underside of the cam follower member 27 which, in turn, is securely fixed to the underside of the blade.
  • the upper edge of the closure plate extends centrally into the inverted U-shaped cross section of the strip and is thus tightly sealed on both sides.
  • the strip is of relatively thick section between the mounting surfaces and is of flexible, relatively soft material.
  • the amount of blade movement is sufficiently limited and the mechanical advantage of the adjusting mechanism is sufficiently great so that the restoring force of the rubber strip is readily overcome, either in tension or compression, and does not affect the free adjusting movement of the blade.
  • the reactive stress of the strip may simply, as a minor factor, be added to, or subtracted from, the reactive force of the blade, depending upon whether the strip is, at a given point of adjustment, in tension or compression.
  • the longitudinally extending chamber 29, which may be broken up into sections by mounting pads 26, or which may be continuous is, nevertheless, tightly and continuously sealed against the entry of contaminants, primarily ink and paper dust and particularly a combination of the two.
  • the integrity of the seal is such that even airborne ink mist is prevented from entering and building up on the surfaces so that there is no possibility of the mechanism being degraded in its accuracy and responsiveness as a result of passage of time.
  • the screw 20 by keeping the thread of the screw 20 completely isolated against deposits of gummy ink, the screw remains free turning which is particularly desirable where the screw is rotated by a remotely controlled servo type drive motor of limited torque capability.
  • the blade may be of slit construction with sections, for example corresponding to column positions, arranged so closely side by side as to preclude any ink leakage.
  • the blade 15 may, as shown, be of composite construction in which the heavy base portion of the blade is slit on a zonal basis while the thin top portion is in tact from end to end. It will be understood that in the case of a slit blade the cam follower elements 27 will have an axial length equal to the width of the controlled section of blade, but the resilient strip 41 may, nonetheless, extend continuously over the length of the fountain with unbroken sealing integrity.
  • the strip 40 of elastomeric material i.e. rubber
  • the strip 40 of elastomeric material i.e. rubber
  • This type ofjoint is preferred over a slidable joint since deformation of the rubber is immune to collections of gummy or dried ink which may build up on the exposed side whereas a joint providing relative sliding movement may be subject to stickiness.
  • the invention in certain of its aspects is not limited to actual bonding or vulcanization provided that an elastomeric strip is used.
  • an ink fountain comprising a frame, a fountain roller mounted in the frame and extending parallel to it, theframe including a vertically extending wall portion providing an upwardly facing supporting surface as well as a base portion, a fountain blade secured to the supporting surface and having a projecting portion terminating in a tip extending into operative engagement with the under surface of the roller to define an ink film thereon said blade having on its bottom side a cam follower portion spaced inwardly of said tip, the base portion projecting laterally from the wall in the same direction as the blade, the projecting portion of the blade and base portion of the frame vertically opposed thereto being of approximately equal dimension and together defining a longitudinal chamber under the blade, a body of ink above the blade, means for rotating the roller so that its surface rotates downwardly through the body of ink, adjusting mechanism in the chamber engaging the underside of the blade and including a series of adjusting screws which penetrate the wall portion and which are sealed with respect to it, the screws having individual cams engaging the blade along said cam follow

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
US447752A 1973-03-07 1974-03-04 Ink fountain in printing presses Expired - Lifetime US3922966A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE7308585 1973-03-07

Publications (1)

Publication Number Publication Date
US3922966A true US3922966A (en) 1975-12-02

Family

ID=6637261

Family Applications (1)

Application Number Title Priority Date Filing Date
US447752A Expired - Lifetime US3922966A (en) 1973-03-07 1974-03-04 Ink fountain in printing presses

Country Status (3)

Country Link
US (1) US3922966A (enrdf_load_stackoverflow)
FR (1) FR2220381B3 (enrdf_load_stackoverflow)
GB (1) GB1459527A (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4353300A (en) * 1979-12-13 1982-10-12 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Inking system for rotary offset printing machine
US4402264A (en) * 1980-07-09 1983-09-06 Miller-Johannisberg Druckmaschinen Gmbh Apparatus for adjusting the ink metering device of a printing machine inking mechanism
US4502386A (en) * 1982-05-13 1985-03-05 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Ink fountain having temperature responsive element
JPS6042046A (ja) * 1983-07-22 1985-03-06 ハイデルベルガ−・ドルツクマシ−ネン・アクチエンゲゼルシヤフト オフセツト印刷機のインキ調量装置
US4864930A (en) * 1985-05-09 1989-09-12 Graphics Microsystems, Inc. Ink control system
US5052298A (en) * 1985-05-09 1991-10-01 Graphics Microsystems Ink control system
US5857412A (en) * 1996-08-22 1999-01-12 Heidelberger Druckmaschinen Ag Ink dosing device for a printing press
US6076463A (en) * 1998-03-13 2000-06-20 Heidelberger Druckmaschinen Ag Ink metering device and method of metering ink
US20040206259A1 (en) * 2003-04-16 2004-10-21 Arthur Pudark Fountain ink feed system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2648098C3 (de) * 1976-10-23 1984-01-05 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Farbkasten für Offset- oder Hochdruckmaschinen
DE3203500C2 (de) * 1982-02-03 1988-03-03 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Farbmesser und eine Einstellvorrichtung für ein Farbmesser

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1724075A (en) * 1925-03-05 1929-08-13 Fred S English Ink-regulating mechanism for extended delivery devices of printing presses
US1862744A (en) * 1929-08-31 1932-06-14 Goss Printing Press Co Ltd Inking mechanism
US2178069A (en) * 1937-05-06 1939-10-31 Goss Printing Press Co Ltd Rotary intaglio printing press
US2550454A (en) * 1945-06-13 1951-04-24 Goss Printing Press Co Ltd Inking mechanism for rotary intaglio printing presses
US2717550A (en) * 1951-11-29 1955-09-13 Publication Corp End seal for rotary intaglio fountain
US2718848A (en) * 1952-02-23 1955-09-27 Goss Printing Press Co Ltd Ink fountain for printing presses
US2837024A (en) * 1955-04-07 1958-06-03 John Waldron Corp Ink fountain blade
US2945437A (en) * 1958-05-05 1960-07-19 Miehle Goss Dexter Inc Seal-off arrangement for undershot ink fountain
US3040442A (en) * 1959-04-27 1962-06-26 Lyle S Overton Blade assembly for drum dryers or the like
US3121904A (en) * 1961-04-07 1964-02-25 Vickerys Ltd Doctors for paper making machines
US3123839A (en) * 1964-03-10 Windshield operating mechanism
US3333381A (en) * 1964-04-20 1967-08-01 Daimler Benz Ag Sealing strip
US3456585A (en) * 1967-03-22 1969-07-22 John C Motter Printing Press C Blade-setting mechanism
US3696743A (en) * 1969-06-11 1972-10-10 Planeta Veb Druckmasch Werke Apparatus for regulating a color dosing device in relation to a color doctor roller

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123839A (en) * 1964-03-10 Windshield operating mechanism
US1724075A (en) * 1925-03-05 1929-08-13 Fred S English Ink-regulating mechanism for extended delivery devices of printing presses
US1862744A (en) * 1929-08-31 1932-06-14 Goss Printing Press Co Ltd Inking mechanism
US2178069A (en) * 1937-05-06 1939-10-31 Goss Printing Press Co Ltd Rotary intaglio printing press
US2550454A (en) * 1945-06-13 1951-04-24 Goss Printing Press Co Ltd Inking mechanism for rotary intaglio printing presses
US2717550A (en) * 1951-11-29 1955-09-13 Publication Corp End seal for rotary intaglio fountain
US2718848A (en) * 1952-02-23 1955-09-27 Goss Printing Press Co Ltd Ink fountain for printing presses
US2837024A (en) * 1955-04-07 1958-06-03 John Waldron Corp Ink fountain blade
US2945437A (en) * 1958-05-05 1960-07-19 Miehle Goss Dexter Inc Seal-off arrangement for undershot ink fountain
US3040442A (en) * 1959-04-27 1962-06-26 Lyle S Overton Blade assembly for drum dryers or the like
US3121904A (en) * 1961-04-07 1964-02-25 Vickerys Ltd Doctors for paper making machines
US3333381A (en) * 1964-04-20 1967-08-01 Daimler Benz Ag Sealing strip
US3456585A (en) * 1967-03-22 1969-07-22 John C Motter Printing Press C Blade-setting mechanism
US3696743A (en) * 1969-06-11 1972-10-10 Planeta Veb Druckmasch Werke Apparatus for regulating a color dosing device in relation to a color doctor roller

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4353300A (en) * 1979-12-13 1982-10-12 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Inking system for rotary offset printing machine
US4402264A (en) * 1980-07-09 1983-09-06 Miller-Johannisberg Druckmaschinen Gmbh Apparatus for adjusting the ink metering device of a printing machine inking mechanism
US4502386A (en) * 1982-05-13 1985-03-05 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Ink fountain having temperature responsive element
JPS6042046A (ja) * 1983-07-22 1985-03-06 ハイデルベルガ−・ドルツクマシ−ネン・アクチエンゲゼルシヤフト オフセツト印刷機のインキ調量装置
US4864930A (en) * 1985-05-09 1989-09-12 Graphics Microsystems, Inc. Ink control system
US5052298A (en) * 1985-05-09 1991-10-01 Graphics Microsystems Ink control system
US5857412A (en) * 1996-08-22 1999-01-12 Heidelberger Druckmaschinen Ag Ink dosing device for a printing press
US6076463A (en) * 1998-03-13 2000-06-20 Heidelberger Druckmaschinen Ag Ink metering device and method of metering ink
US20040206259A1 (en) * 2003-04-16 2004-10-21 Arthur Pudark Fountain ink feed system
US7032511B2 (en) * 2003-04-16 2006-04-25 A.B. Dick Company Fountain ink feed system

Also Published As

Publication number Publication date
FR2220381A1 (enrdf_load_stackoverflow) 1974-10-04
FR2220381B3 (enrdf_load_stackoverflow) 1976-12-03
GB1459527A (en) 1976-12-22

Similar Documents

Publication Publication Date Title
US3855927A (en) Ink fountain blade for printing presses
US3922966A (en) Ink fountain in printing presses
US4455938A (en) Dampening apparatus for lithographic press
US4242958A (en) Ink duct for offset or relief printing machines
US3691956A (en) Flat adjusting and throw-off arrangement for form roller in printing press
CA1195179A (en) Damping-inking unit for offset printing presses
EP0513480B1 (en) Ink unit for printing press and method
US4495864A (en) Ink knife and adjusting device therefor on an ink duct of a rotary printing machine
US2920558A (en) Fountain dividers
US4350095A (en) Ink fountain on inking units of printing presses
JPS60206646A (ja) 印刷機用のインキ壺
US4404908A (en) Arrangement for supplying ink to the printing plate of a printing press
US3902417A (en) Wetting system for rotary offset printing presses
GB2058671A (en) Inking apparatus for printing machines
JPH0790637B2 (ja) オフセット印刷機又は凸板印刷機のためのインキつぼ
EP0131106A3 (en) Inking device for a printing machine
US2275514A (en) Ink fountain structure
JPS5894468A (ja) 印刷機用インキ装置
US2350089A (en) Bearing shield
US4711174A (en) Device for engaging and disengaging the form rollers in an inking unit of a printing machine
US5809887A (en) Ink duct of a rotary printing press
US4232601A (en) Squeegee arrangement
US4711176A (en) Ink fountain incorporating individually regulated metering segments
EP0331781B1 (en) Method and apparatus for supplying ink for a printing press
US3246601A (en) Adjusting device for printing press ductor rolls