US3645202A - Lithographic inking dampening system - Google Patents

Lithographic inking dampening system Download PDF

Info

Publication number
US3645202A
US3645202A US25507A US3645202DA US3645202A US 3645202 A US3645202 A US 3645202A US 25507 A US25507 A US 25507A US 3645202D A US3645202D A US 3645202DA US 3645202 A US3645202 A US 3645202A
Authority
US
United States
Prior art keywords
ink
roll
pan
moisture
supply
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
US25507A
Other languages
English (en)
Inventor
Francis K Lake
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.)
AB Dick Co
Original Assignee
Multigraphics Inc
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 Multigraphics Inc filed Critical Multigraphics Inc
Application granted granted Critical
Publication of US3645202A publication Critical patent/US3645202A/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
    • B41F31/06—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
    • B41F7/36—Inking-rollers serving also to apply ink repellants

Definitions

  • rollers divide and smooth out the ink until, ostensibly, the final roller which delivers the ink to the surface of a master printing plate on the master cylinder presents an extremely fine and evenly divided layer of ink. Presses for high-quality halftone printing have a greater number of such rollers whereas the more utilitarian presses used for line copy such as typing and artist drawing can use far fewer rollers efficiently.
  • ADVANTAGES AND OBJECTS One of the primary advantages of this invention is that the path from the bulk ink supply to the demand area on a master cylinder is exceedingly short. Hence, it is an object of this invention to provide a fully adequate ink supply to meet any demand situation.
  • a further advantage of this invention is that liquid ink is metered to the form roll by means of a shear blade which establishes a completely uniform coating on the ink roll and hence to the form.
  • a further advantage of this invention is to provide a complete ink and lithographic moisture fountain supply which is readily removable from the machine for cleaning.
  • FIG. 1 is a substantially schematic side elevation with some parts in cross section, illustrating the principals of the invention
  • FIG. 2 is an end elevation view FIG. 1, but illustrating essentially only the supply system without the operating structure behind.
  • a form roll 12, an ink roll 14 and a moisture roll 16 all are in surface contact with one another and the form roll is positioned to contact the surface of the master cylinder whenever the entire system is moved forward to cause such contact. Otherwise, the assembly of the three rolls and its supporting structure may be physically removed such that the roll 12 does not make contact.
  • the contacting or not as the case may be is for the same reason that any form roll in any lithographic inking system is caused to contact or not.
  • This illustrated embodiment of the invention is built upon two side plates 18, and the rolls 12, 14 and 16 are journaled on the side plates by conventional bearings and mounting devices.
  • the conventional inking system by using a series of rolls, causes an original deposit of ink or moisture to be passed to the next roll, and thus subdivided.
  • the first roll will keep half and provide half to the subsequent roll. This dividing and subdividing process is continued until the necessary distribution and metering of both ink and moisture is achieved.
  • the moisture is metered from the moisture roll 16 by means of a rod 20 which has a face shear blade 21 of compliant elastomer.
  • the blade In the illustrated position as shown in FIG. 1, the blade is tangential to the roller 16 and hence has a minimum wiping or shearing effect. Hence, a maximum film of moisture will be able to wedge between the face of the blade 21 and the surface of the roll 16.
  • the amount of moisture is diminished by causing the rod to rotate about its axis and thus place a smaller surface area of the shear blade 21 against the surface of the roll 16. Hence, any pressure applied to the rod 20 will be applied through the blade in a smaller total area and therefore will cause a greater proportion of moisture to be stripped away from the surface of the roll 16.
  • the rod 20 is mounted between a pair of links 22, each being positioned laterally near the opposed walls 18.
  • the rod 20 is affixed to the one end oflink 22 and hence is not free to float with respect to the link. Consequently, turning the link will cause the face of the blade 21 to turn.
  • one end of link 22 is pivotally mounted to a pressure applicator link 24.
  • the at titude of link 22 is controlled by attaching a link 26 to its opposite end.
  • a pivot 28 for the link 24 permits application of pressure.
  • an adjacent screw 30 on the top end of link 24 operates against a swingable link 31.
  • Link 31 is pivoted at 32 and is pulled toward the link 24 by means of a spring 33.
  • Adjustment of the longitudinal extend of the screw 30 will determine the amount of pressure applied to the rod 20, and the longitudinal position of link 26 will determine the rotational attitude of the rod 20 and hence the amount of area of the blade 21 subjected to the available pressure.
  • the link 26 is adjustable by the operator through an apparatus which includes a guide yoke 36 extending laterally across the structure between the plate 18 and adapted thereby to guide a rod 38 in a forward and rearward movement.
  • a rod 40 is connected between the side plates and serves as a pivotal support for the yoke.
  • the rod 40 is drilled to accept a stem of a threaded rod 42, which threaded rod is threadably engaged substantially at the center of the rod 38 and therefore is adapted to drive the rod 38 forward or rearwardly in the bit of the yoke 36 and hence drive the link 26 in producing the desired attitude of blade 21.
  • the ink roll 14 is contacted by a shear blade 34 to remove ink from the surface of the roll to the degree desired.
  • the roll 14 is caused to run with its lower perimeter area immersed in lithographic ink made liquid by a high percentage of extremely volatile solvent.
  • any ink which is carried past the shear blade 34 and immediately deposited on the form roll 12 will be rapidly subjected to an increased viscosity and will permit deposit of a suitably viscuous form of ink onto the master on the master cylinder 10 for proper inking and printing function.
  • the ink and moisture solution are supplied to the rollers 14 and 16 in this particular embodiment by means of a pan 45 having a dividing floor 47 to mechanically separate the ink from the moisture area.
  • the ink in this particular embodiment is in the lower compartment in order to flow forward and reach the ink roll 14, whereas the moisture is confined in the upper compartment where the roll 16 is partially immersed therein.
  • An ink bottle for supply of liquid ink is indicated by reference character 49 and is held by a bracket 50.
  • the bottle 49 has a long neck portion which reaches down and extends through an opening in the floor 47 and thereby provides a constant supply of the fluid ink to that area.
  • the level is maintained by the well known physical principles of pressure differential.
  • a moisture solution bottle 51 is also held by a bracket 52, and that bottle 51 is elevated in order that the moisture solution will be applied only into the upper area above the floor 47.
  • the pan is supported by rollers 54 shown in FIG. 1 at the remote end of the pan.
  • Other rollers 53 are mounted on the ends of a rod 55 shown at the forward portion of the pan.
  • the rod 55 extends across the bottom between the rollers 53 and is supported by readily removable bearing members for disengagement of the rod 55 from the sideplates 18.
  • a bracket 56 secured to the bottom of the pan 45 accepts a threaded rod 57.
  • the rod 57 is secured rotatably to the rod 55 and hence enables the operator to adjust the longitudinal pan position.
  • the shear blade 34 for the roll 14 is mounted on the end of the pan and therefore the operator adjusts the pan position in order to adjust the shear blade pressure against the roller 14 for metering the amount of ink desired.
  • the pan is held tight against rollers 54 by rollers 58 which ride a top edge of the pan.
  • the pan can move laterally a limited distance, supported by the top and bottom roller sets 54 and 58, but because of the end wall configuration of the pan, it cannot be fully removed by rectilinear movement.
  • the front, or remote end of the pan has a closed track configuration in which the front roller 58 resides.
  • the pan and the roller 58 will separate.
  • the lower edge of the pan then will clear the remote roller 54 and allow the pan to drop at the front end.
  • the pan may be pulled free of the restraining rollers and removed from the machine for cleaning.
  • a liquid ink lithographic printing system comprising:
  • a fountain pan means for providing and maintaining oleous liquid lithographic ink to a preselected level in said pan; means for positioning said pan to immerse a portion of said ink supply roll below said level;
  • a moisture solution pan means for providing and maintaining a lithographic moisture solution to a preselected level in said moisture solution pan;
  • the moisture solution pan is nested within said ink fountain pan and each is kept to the predetermined level by gravity supply bottles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
US25507A 1970-04-03 1970-04-03 Lithographic inking dampening system Expired - Lifetime US3645202A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US2550770A 1970-04-03 1970-04-03

Publications (1)

Publication Number Publication Date
US3645202A true US3645202A (en) 1972-02-29

Family

ID=21826489

Family Applications (1)

Application Number Title Priority Date Filing Date
US25507A Expired - Lifetime US3645202A (en) 1970-04-03 1970-04-03 Lithographic inking dampening system

Country Status (6)

Country Link
US (1) US3645202A (de)
BE (1) BE765158A (de)
CA (1) CA928570A (de)
DE (1) DE2113722A1 (de)
FR (1) FR2089093A5 (de)
GB (1) GB1315299A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3805700A (en) * 1970-08-17 1974-04-23 Etudes De Machines Speciales Damping device for rotary offset printing machine
US4092922A (en) * 1975-07-25 1978-06-06 Addressograph-Multigraph Corporation Lithographic ink supply
US4287827A (en) * 1979-05-17 1981-09-08 Warner Gordon R Combined inking and moistening roller
US4407196A (en) * 1980-02-29 1983-10-04 American Newspaper Publishers Association Method of enhancing inking in offset presses
US4703690A (en) * 1985-07-19 1987-11-03 Ferd Buesch Ag Device for pre-emulsifying of ink emulsion in offset printing apparatus
US6393983B1 (en) * 1999-10-21 2002-05-28 Kabushiki Kaisha Tokyo Kikai Seisakusho Ink rail for printing press

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US430269A (en) * 1890-06-17 Apparatus for
US2240762A (en) * 1938-01-12 1941-05-06 Maschf Augsburg Nuernberg Ag Inking apparatus for aniline color printing machines
US2534320A (en) * 1946-05-16 1950-12-19 Champion Paper & Fibre Co Apparatus for coating paper
US2689522A (en) * 1949-10-11 1954-09-21 Addressograph Multigraph Inking and moistening means for rotary planographic printing machines
US2733654A (en) * 1956-02-07 Inking and repellent system for plano-
US3343484A (en) * 1964-12-16 1967-09-26 Harold P Dahlgren Lithographic dampener with skewed metering roller
US3352317A (en) * 1964-12-09 1967-11-14 Dahlgren Mfg Company Inc Dampening fluid cooling and circulating apparatus for lithographic offset press dampening device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US430269A (en) * 1890-06-17 Apparatus for
US2733654A (en) * 1956-02-07 Inking and repellent system for plano-
US2240762A (en) * 1938-01-12 1941-05-06 Maschf Augsburg Nuernberg Ag Inking apparatus for aniline color printing machines
US2534320A (en) * 1946-05-16 1950-12-19 Champion Paper & Fibre Co Apparatus for coating paper
US2689522A (en) * 1949-10-11 1954-09-21 Addressograph Multigraph Inking and moistening means for rotary planographic printing machines
US3352317A (en) * 1964-12-09 1967-11-14 Dahlgren Mfg Company Inc Dampening fluid cooling and circulating apparatus for lithographic offset press dampening device
US3343484A (en) * 1964-12-16 1967-09-26 Harold P Dahlgren Lithographic dampener with skewed metering roller

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3805700A (en) * 1970-08-17 1974-04-23 Etudes De Machines Speciales Damping device for rotary offset printing machine
US4092922A (en) * 1975-07-25 1978-06-06 Addressograph-Multigraph Corporation Lithographic ink supply
US4287827A (en) * 1979-05-17 1981-09-08 Warner Gordon R Combined inking and moistening roller
US4407196A (en) * 1980-02-29 1983-10-04 American Newspaper Publishers Association Method of enhancing inking in offset presses
US4703690A (en) * 1985-07-19 1987-11-03 Ferd Buesch Ag Device for pre-emulsifying of ink emulsion in offset printing apparatus
US6393983B1 (en) * 1999-10-21 2002-05-28 Kabushiki Kaisha Tokyo Kikai Seisakusho Ink rail for printing press

Also Published As

Publication number Publication date
CA928570A (en) 1973-06-19
GB1315299A (en) 1973-05-02
DE2113722A1 (de) 1971-10-14
FR2089093A5 (de) 1972-01-07
BE765158A (fr) 1971-08-30

Similar Documents

Publication Publication Date Title
US6672211B2 (en) Inking systems for printing presses
US3168037A (en) Means for dampening lithographic offset printing plates
US4432282A (en) Printing press
US6951174B2 (en) Printing systems and methods using keyless inking and continuous dampening
US3587463A (en) Simplified circulating inking system for rotary newspaper printing press
US4208963A (en) Newspaper printing system
DK154195B (da) Fugte-farvevaerk for offsettrykmaskiner
US4373442A (en) Portable ink fountain
JPH0242666B2 (de)
US4186661A (en) Flexographic inking system including a reverse angle doctor blade
US4407196A (en) Method of enhancing inking in offset presses
US4233898A (en) Reversible newspaper press
US4610201A (en) Printing unit with short inking device
US2733654A (en) Inking and repellent system for plano-
US2310788A (en) Means for inking printing forms
US3645202A (en) Lithographic inking dampening system
US2293691A (en) Apparatus for coating web material
US3146706A (en) Dampening system for lithographic printing presses
US4237785A (en) Inker for applying newsprint type ink
US2213419A (en) Inking mechanism
JPS60242065A (ja) 輪転印刷機の版胴の版盤にインキを着けるインキ装置
US3902417A (en) Wetting system for rotary offset printing presses
US4928623A (en) Varnish coating mechanism
GB2069932A (en) Reversible printing press
US6571710B1 (en) Keyless inker for a printing press