US3608483A - Inking system with means for milling hydrophobic liquid into water miscible ink film - Google Patents

Inking system with means for milling hydrophobic liquid into water miscible ink film Download PDF

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Publication number
US3608483A
US3608483A US807325A US3608483DA US3608483A US 3608483 A US3608483 A US 3608483A US 807325 A US807325 A US 807325A US 3608483D A US3608483D A US 3608483DA US 3608483 A US3608483 A US 3608483A
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Prior art keywords
ink
roller
rollers
printing
water
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Expired - Lifetime
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US807325A
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English (en)
Inventor
Bernard Kaminstein
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Inc C Olivette & C Spa
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Inc C Olivette & C SpA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/06—Lithographic printing

Definitions

  • a small quantity of a hydrophobic liquid is dropped on one roller of the train of rollers of the printing press, ahead of the roller which directly applies ink to the printing master. This liquid is milled into the ink by the rolling action of the rollers. The end result is that the image areas of the printing master accept that water-based ink and the nonimageareas reject the water-based ink.
  • the electrophotographic copy which, by way of example, is a zinc oxide coated sheet of paper on which a toner image has been developed by electrophotography, has its image-bearing surface surface in contact with a transfer sheet.
  • the transfer sheet which may be made of plastic material, is substantially transparent to infrared light. Infrared light is then applied through the back surface of the transfer sheet whereby the toner image on the zinc oxide sheet preferentially heats up to a temperature at which it can melt the plastic sheet with which it is in contact. The heat is then removed, the toner image cools, and then, upon stripping the transfer sheet from the copy the toner image and the zinc oxide material adjacent thereto adheres to the transfer sheet.
  • the duplicating master now has the image areas of the electrophotographic copy raised above the surface thereof. These image areas have the property that they will preferentially absorb water-based inks whereas the nonimage areas repel water-based inks.
  • a technique for inking this duplicating master is described in an application by Schmutzler et al. Ser. No. 711,519, filed March 8, 1968, for a "Method and Means for Making a Pring Master, which is assigned to a common assignee.
  • a liquid immiscible with water or water-miscible inks was applied to the nonimage portions of the printing master. Thereafter, a watermiscible-based ink was applied to the printing master and the ink was rejected by the preferentially coated nonimage areas and was accepted by the image areas.
  • the master was first coated with a liquid immiscible with water which is then preferentially removed from the image areas to render them selectively attractive to the water-miscible printing ink.
  • An object of this invention is to provide a simpler arrangement than heretofore employed for preferentially applying ink to the image areas of a printing master, in a manner to enable excellent prints to be obtained.
  • Another object of this invention is the provision of a onestep method and means for inking a printing master which will thereafter produce excellent prints.
  • Still another object of the present invention is the provision of a novel and unique method and means for inking a printing master with hydrophilic ink.
  • FIG. 1 is schematic diagram showing the roller arrangement for a printing press and indicating the roller upon which a hydrophobic liquid such as oil is dropped, in accordance with this invention.
  • FIG. 2 represents another typical printing press roller arrangement and indicating the location which oil is dropped.
  • FIG. 3 indicates an oil distribution system in accordance with this invention.
  • FIG. 4 illustrates an addition which may be made to the inkfeeding system of a printing press, in accordance with this invention.
  • FIG. 1 is a schematic arrangement illustrative of the arrangement of rollers used in a commercially purchasable printing press. No modification is required in the arrangement of the rollers or in the manner in which printing is effectuated.
  • a printing master 14 is wrapped around the plate cylinder 12 and is to receive ink from the form rollers 32, 34 in the usual manner.
  • printing master 14 is preferentially wettable in the image areas by hydrophilic inks and can be made for example in accordance with the teachings of the application by this inventor, Ser. No. 668,262, filed June 12, 1967.
  • An ink supply 16, for the printing press is adjacent the fountain roller 18, which receives ink from the ink supply container and transfers it to a ductor roller 20.
  • the ductor roller 20 rotates and also oscillates reciprocally between the fountain roller and one of the distributing rollers 22, in well-known fashion.
  • the distributing roller 22 rotates in contact with another distributing roller 24, which in turn rotates in contact with a vibrator roller 26.
  • the vibrator roller oscillates reciprocally along its axis in order to assist in distributing the ink in a uniform coating. It in turn contacts another distributing roller 28.
  • the distributing roller 28 rotates in contact with another distributing roller 30.
  • the distributing roller 30 rotates in contact with two form rollers 32, 34.
  • the two form rollers in turn rotate in contact with the plate cylinder 12.
  • the plate cylinder 12 receives the uniformly distributed film of ink from the form rollers 32, 34.inking printing master 14. Paper 36, upon which it is desired that printing occur, is moved in contact with the printing master on
  • a hydrophobic liquid such as oil
  • oil drop device 36 a hydrophobic liquid, such as oil
  • the oil that is dropped on the roller is mixed or milled into the ink by the successive rollers so that it is pretty uniformly distributed in the ink which is applied to the duplicating master.
  • the quantity of oil which is used is quite small. It varies with the viscosity of the ink, the heavier the viscosity the smaller the amount of oil that has to be used. For example, when an ink having an average viscosity of I20 poises is employed, for every five 8X10 prints, 0.03 cc. of oil is used. With a heavier viscosity of ink such as 300 poises, 0.02 cc. of oil is used.
  • rollers upon which the oil is to be dropped are critical parts about the selection of the roller upon which the oil is to be dropped. Two or more rollers back of the plate cylinder appear to be adequate. It is also desirable that the rollers contacting the one on which the oil is dropped as well as any additional rollers intended to mill the oil in the ink be made to engage adjacent rollers with some pressure to insure a uniform and thorough milling of the oil into the ink. By way of illustration, and not as a limitation, pressures on the order of 2530 pounds per linear inch have been used.
  • FIG. 2 there is shown another ink roller lineup between the ink supply 40 and the final plate roller 42 around which the printing master 44 has been wrapped.
  • the hydrophobic liquid instead of the hydrophobic liquid being dropped on the vibrating roller 26, it is dropped on a distributing roller 46 from the oil drop device 48.
  • the drops are dropped further down the chain of rollers than they were as shown in FIG. 1.
  • the end results which were obtained are the same as in the first arrangement. In each case, pressures on the order of 25-30 pounds per linear inch were applied between the vibrator roll and a plurality of distributing rollers.
  • FIG. 3 shows the ink drop mechanism which is employed.
  • the hydrophobic liquid in a reservoir 50 is fed to a pump 52.
  • the liquid may be Magic 400 oil, which is a kerosene fraction distilling between 398 F. and 435 F.
  • the pump is actuated by a solenoid 54.
  • the solenoid is actuated by an output of a counter 56.
  • the counter in turn is advanced in response to a voltage pulse.
  • The. voltage pulse is induced in a coil 58 which is connected to the input to the counter that has its closed-loop end adjacent to the side of the plate cylinder 12, for example.
  • a permanent magnet 60 is attached-to the side of the plate cylinder so that during the course of its rotation it will cause the magnetic field of the magnet to be passed by the loop 58.
  • the plate cylinder rotates once for every print that is made, one can arrange to actuate the pump at a predetermined count of the counter whereby a predetermined amount of oil is dropped on the vibrator roller 26 for every predetermined number of prints which are made.
  • the solenoid 54 was operated.
  • the roller on which the ink was dropped had an axial length of 10 inches and the diameter was 2%inches.
  • the number of prints per operation of the pump is not critical so long as the proper quantity of oil is metered out.
  • a branching tree arrangement 60 was employed. As shown, successive branches of tubing are bifurcated or split in two, ending up with enough tubes, here shown as 16, to insure a fairly even ink drop distribution.
  • the branch ends 62, 62' are formed of No. 26 hypodermic needles. These have a length of Be inch and a diameter of the opening of 0.003] inch.
  • the pump 52 was made from a 2-cc. hypodermic syringe. The solenoid, when operated would meter out quantities of oil on the order of 0.1 cc.
  • the arrangement shown for metering out the oil is illustrative. Other arrangements may be employed such as to use a tube with a plurality of small holes, which tube is extended over the roller.
  • a pump is used to pressurize the oil into the tube at the center and a baffle is placed in the tube to distribute the oil evenly to the holes through which the oil is dropped onto the roller.
  • a prefer-re way of feeding ink onto the fountain roller, in accordance with this invention, is to feed it under pressure so that it is forced onto the fountain roller. This may be achieved very simply in the manner shown in FIG. 4.
  • the ink supply reservoir 40 which is fragmentally shown contains a supply of ink 64.
  • a board 66 is floated on the ink.
  • a weight 68 is placed on top of the board.
  • the ink is quite viscous and so can support a weight. The weight selected is not so heavy as to sink when placed on the ink in the reservoir.
  • ink under pressure to the fountain roller is believed to be because it may happen that some of the oil dropped on a downstream roller may work its way back up the roller train to the fountain roller with the result that sufficient ink may not be taken up by the fountain roller to insure an even ink coating over the following rollers and thus the print quality may not be as good as desired. When the ink is forces onto the fountain roller this does not happen and print quality is excellent and remains excellent.
  • Apparatus for inking a printing master comprising:
  • ink-film-forming means including a train of a plurality of rollers for forming a water-miscible film of ink and applying it to the surface of said printing master, and
  • means for milling predetermined amounts of a hydrophobic liquid into the film of ink formed by said train of rollers including:
  • each of the plurality of outputs of said plurality of successively bifurcated pipes comprise a hollow needle.

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  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
US807325A 1969-03-14 1969-03-14 Inking system with means for milling hydrophobic liquid into water miscible ink film Expired - Lifetime US3608483A (en)

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US80732569A 1969-03-14 1969-03-14

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JP (1) JPS5134323B1 (enrdf_load_html_response)
DE (1) DE2012878A1 (enrdf_load_html_response)
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3683808A (en) * 1970-03-20 1972-08-15 Ricoh Kk Water feeding method for offset printing
US3804012A (en) * 1969-10-31 1974-04-16 Bohm Benton Inc Ink supply with motion accumulator for stencil duplicator
US4077324A (en) * 1974-07-03 1978-03-07 Xerox Corporation Method of fountainless lithography
US4078493A (en) * 1974-11-26 1978-03-14 Fuji Photo Film Co., Ltd. Desensitizing using dry reverse lithographic plate
US4469024A (en) * 1982-10-18 1984-09-04 Press Machinery Corporation Fluid dispensing apparatus such as spray dampener for printing press and method of dispensing
US4903599A (en) * 1981-10-10 1990-02-27 Basf Farben & Fasern Akg. Printed products and a process for their manufacture

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52119308U (enrdf_load_html_response) * 1976-03-05 1977-09-09

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1669416A (en) * 1922-10-13 1928-05-15 William C Huebner Planographic-printing element and process of making same
US1854719A (en) * 1930-10-27 1932-04-19 Fax Company Mercury printing apparatus and process
US1924731A (en) * 1932-07-27 1933-08-29 P G Publishing Company Supply mechanism
US2018193A (en) * 1931-08-27 1935-10-22 Goss Printing Press Co Ltd Inking mechanism and method
US2110216A (en) * 1937-09-10 1938-03-08 John G Goedike Dual purpose distributing system for rotary offset and lithographic presses
GB502316A (en) * 1937-10-06 1939-03-15 Carl Einar Larsen Improvements in planographic printing, particularly offset printing
US2231694A (en) * 1938-05-07 1941-02-11 Miehle Printing Press & Mfg Dampening apparatus
US2530282A (en) * 1948-10-26 1950-11-14 Fred K H Levey Co Inc Method of and apparatus for printing
GB903724A (en) * 1957-10-26 1962-08-15 Emile Boillet Improved printing ink
US3356030A (en) * 1964-04-30 1967-12-05 Interchem Corp Planographic printing method

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1669416A (en) * 1922-10-13 1928-05-15 William C Huebner Planographic-printing element and process of making same
US1854719A (en) * 1930-10-27 1932-04-19 Fax Company Mercury printing apparatus and process
US2018193A (en) * 1931-08-27 1935-10-22 Goss Printing Press Co Ltd Inking mechanism and method
US1924731A (en) * 1932-07-27 1933-08-29 P G Publishing Company Supply mechanism
US2110216A (en) * 1937-09-10 1938-03-08 John G Goedike Dual purpose distributing system for rotary offset and lithographic presses
GB502316A (en) * 1937-10-06 1939-03-15 Carl Einar Larsen Improvements in planographic printing, particularly offset printing
US2231694A (en) * 1938-05-07 1941-02-11 Miehle Printing Press & Mfg Dampening apparatus
US2530282A (en) * 1948-10-26 1950-11-14 Fred K H Levey Co Inc Method of and apparatus for printing
GB903724A (en) * 1957-10-26 1962-08-15 Emile Boillet Improved printing ink
US3356030A (en) * 1964-04-30 1967-12-05 Interchem Corp Planographic printing method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3804012A (en) * 1969-10-31 1974-04-16 Bohm Benton Inc Ink supply with motion accumulator for stencil duplicator
US3683808A (en) * 1970-03-20 1972-08-15 Ricoh Kk Water feeding method for offset printing
US4077324A (en) * 1974-07-03 1978-03-07 Xerox Corporation Method of fountainless lithography
US4078493A (en) * 1974-11-26 1978-03-14 Fuji Photo Film Co., Ltd. Desensitizing using dry reverse lithographic plate
US4903599A (en) * 1981-10-10 1990-02-27 Basf Farben & Fasern Akg. Printed products and a process for their manufacture
US4469024A (en) * 1982-10-18 1984-09-04 Press Machinery Corporation Fluid dispensing apparatus such as spray dampener for printing press and method of dispensing

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DE2012878A1 (de) 1970-10-01
JPS5134323B1 (enrdf_load_html_response) 1976-09-25
GB1267268A (enrdf_load_html_response) 1972-03-15

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