US2165235A - Material applicator for planographic printing machines - Google Patents

Material applicator for planographic printing machines Download PDF

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Publication number
US2165235A
US2165235A US229242A US22924238A US2165235A US 2165235 A US2165235 A US 2165235A US 229242 A US229242 A US 229242A US 22924238 A US22924238 A US 22924238A US 2165235 A US2165235 A US 2165235A
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US
United States
Prior art keywords
roll
ductor
fountain
ink
cam
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
US229242A
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English (en)
Inventor
Franklin E Curtis
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
Priority to BE462025D priority Critical patent/BE462025A/xx
Application filed by Multigraphics Inc filed Critical Multigraphics Inc
Priority to US229242A priority patent/US2165235A/en
Application granted granted Critical
Publication of US2165235A publication Critical patent/US2165235A/en
Priority to FR915624D priority patent/FR915624A/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B41F7/26—Damping devices using transfer rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41L—APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
    • B41L19/00—Duplicating or printing apparatus or machines for office or other commercial purposes, of special types or for particular purposes and not otherwise provided for

Definitions

  • the object of the invention is to provide a simple mechanism which is reliable in operation, and-not likely to get out of. order, forcausing a proper transference of the repellent from its fountain to the plate carrying drum, and the ink from its fountain to said drum.
  • the invention includes features concerned with the ductor rolls of the repellent and ink application, for causing the ductor rolls tomake accu- 1 material applicator System in Planogmpmc rate contact with the fountain rolls and the other rolls with which the ductors coact to transfer material'eifectively. to the'printing roller.
  • a feature of the mechanism is that it enables a dwell of the ductor' roll in contact with the cooperating roll while the mechanism continues its movement toi'operate'th'e fountain roll.
  • the repellant application where the difflculty has been to transfer the very liquid repellant from the fountain to; the plate, my mechanism holds the doctor.
  • each du'ctor roll in a yoke pivoted centrally, on an axis normal to theroll axis, to'a swinging operating device which is connected-tov the operating mechanism. This insures the duc-. tor roll promptly engaging the roll with which it contacts throughout the length of the ductor roll at an equalized pressure.
  • connection plates I I the frame members gripper and ejector. mechanism
  • Fig. 1 is'a substantially centrally located longitudinal section for a printingv machine, embodying my improved material ap- 5 plicator system;
  • Fig. 2 is a fragmentary side elevation thereof, showing the ductor-operating mechanism;
  • Fig. 3 is an enlarged detail of a portion of the ductor-operating'"mechanism;
  • Fig. 4 is a substantially centrally located longitudinal section for a printingv machine, embodying my improved material ap- 5 plicator system;
  • Fig. 2 is a fragmentary side elevation thereof, showing the ductor-operating mechanism;
  • Fig. 3 is an enlarged detail of a portion of the ductor-operating'"mechanism;
  • Fig. 4 is an enlarged detail of a portion of the ductor-operating'"mechanism;
  • a frame comprising a pair of side and I2, tied together by suitable cross members, some of which are generally indicated at IU.
  • Rotatably Journalled in this frame are a 30 pair of horizontally extending shafts i5 and IS, the former supporting a transfer roll it and the latter a pattern roll l9,'which carries a printing member B.
  • the shafts l5 and it may be mounted in eccentric bushings, not shown, to permit them to be adjusted, one with the other.
  • Rotatably journalled on a shaft 20, below the transfer or offset cylinder i8, is a platen roll 2i.
  • 'I'he platen roll shaft 20 maybe supported by l! and I2 in a manner to permit adjustment and alignment of the roll with the offset cylinder.
  • a suitable sheet feed table 22 is mounted on the frame ,to enable work sheets to be fed into the bite'of the platen and offset rolls 2land l8, respectively.
  • the offset roll may be provided with'a suitable illustrated in my copending application 147,507, heretofore 'mentioned, to receive the'paper sheet ahead of the bite'ofthe printing couple and eject or strip 50 such sheet from the roll following the passing .of the paper between the printing couple, guiding such printed sheet beneath a paper guide 23 into a suitablereceptacle 24 carrledby the frame.
  • the present invention is especially concerned Inth'e present application this 20 printing machine has been simplified in many .details for ease of illustration. ,However, referwith the material applicator system for first applying an ink repellant to the planographic or similar type ofprinting plate, and subsequently.
  • planoeraphic ink to such repellant coated plate, so that only the image portions of the printingplate will carry ink to the transfer roll l8, and thereby to the work sheet.
  • the moistening or ink repellant fluid is stored in a removable fountain or tray 3', which is supported on lugs or cars 3
  • the fountain roll is drivingly mounted on stub shafts 33a and 3321, which are journalled in respectiveframe plates II and II, This roll is intermittently driven, as will be hereinafter described.
  • the moistening or repellant fluid is transferred from the fountain roll 32 to a form roll "by a ductor roll 35.
  • the ductor roll is rotatably mounted on a shaft 36, supported by upstanding arms of a yoke 31, Fig. 5.
  • This yoke is pivotally secured to a second yoke", the downwardly depending arms of which are pivotally mounted on respective. frame members II and If, as at 39.
  • the ductor roll 35 is intermittently rocked from contact with the fountain roll 32 into. contact with the form roll 34, as hereinafter explained.
  • the form roll 34, of the repellant applicator system is rotatably supported as by a shaft 40, suitably carried so as to have a proper pressure against the printing plate.
  • a shaft 40 suitably carried so as to have a proper pressure against the printing plate.
  • this shaft is shown in the drawings, and no means, except the resilience of the roll-covering for supplying pressure, but this can be eifected, if desired, by mounting this roll in a removable frame spring pressed toward 7 the pattern drum, as shown in referred to.
  • Both the form roll 34 and the ductor roll 35 my applications are provided with absorptive fabric coverings to enable them to convey the fluid from the fountain roll to the printing plate.
  • Ink is supplied to the moistened .pattern by an yoke is pivotally swured as at 58, as will be hereinafter more fully described, to a second yoke 59,- the'depending arms of which are pivotally secured to respective frame members II and I2, as at a.
  • the support of the ink ductoris therefore similar to that of therepellantductor, as shown in Pig; 5.
  • the ductor roll 55 is rocked periodically about the pivots 6
  • the ink transfer roll is journalled on a shaft This transfer roll transfers the ink from the ductor roll 55 to a. form roll 62, which is journailed on a shaft 5.
  • Theshaft OS is suitably carried in such manner that the roll may beremoved when desired, but in use is spring-pressed against the printing plate B on the plate cylinder l9.
  • no means, other than the resilience of the roll itself, are shown for obtaining pressure, but the means set out in my prior applications mentioned may be employed, ifdeslre'd.
  • the ink distributor roll I4 is driven in synchronism with the pattern drum l9.
  • a gear is drivingly secured to the pattern drum and meshes with a pinion 85 which in turn drives a gear secured to the distributor roll .54.
  • the drum I9 may bedriven from a motor M, the driven pulley II of which is connected with a pulley 88 by a drive belt 89.
  • the pulley 88 is secured-to a stubshaft-Sl, journalled in. the frame plate 12.
  • Also drivingly secured to this stub shaft is a spur gear 9
  • the other gear 94' of this 'gear member meshes with and drives the spur gear 95, which drives the pattern drum .l'9, aswell as to the distributor roll 54.
  • the cam I" on the end of the offset drum coacts with a roller on a rock arm 104.
  • This arm is mounted on a rock shaft I05, journalled in the-frame plate ll.
  • Mounted on the other end of the'rock shaft is a lever I06.
  • Theupper' arm of'this iever operates the repellent-applicator and the lower arm the ink applicator, as about to be described.
  • the upper end of the rocking lever I86 is'provided with a cam extension II", which is adapted to coact with a roller I08, carried by an arm I" extending upwardly from the yoke 3!, which car-1 ries the yoke 31 supporting the repellant ductor roll 35.
  • the ductor roll is normally retained against the repellent form roll 34 by a suitable spring indicated at H0, attached to the arm I, but when the upper end of the lever II! is swung toward the-left (Fig. 2) the nose of the cam extension lfll engages the roller ill and positively shoves it toward the left, until the ductor roller comes into a pressure-contact against the foun tain roll 32, as indicated in Fig. 3.
  • the ductor roll has a soft, absorbent covering, so that its surface is yielding, and hence by properly adjusting roller III the, pressure-of the'ductor roll against the fountain roll may be nicely regulated.
  • tain roll while the latter-is turned, is an im-- portant characteristic of my invention, as it insures effective transfer of the repellant liquid from the fountain roll to the ductor roll. n the return stroke of the lever I06, the spring III effectively holds the ductor roll against the form roll to continue the transfer to the form roll,
  • the upper arm of the'rocking lever IIIB is connected by a link I20 to a rock lever I2I, journailed on the shaft 33a of the repellant fountain roll 32.
  • This shaft carries a ratchet wheel I22 (Fig. 2) and the rock lever III on its lower arm carries a pawl I23, spring-pressed toward the ratchet wheel. Accordingly, the rocking of the lever IIIl operates to give successive partial rotations to the repellant fountain roll, while the ductor roll is firmly held in contact therewith.
  • pawl I23 may be regulated to advance the ratchet wheel, and therefore the fountain roll 32, a varyengages the pawl from the ratchet wheel at a predetermined point, thus determining the dis-. tance the ratchet wheel is to be advanced.
  • a suitable detent such as the spring I28, engages one of a plurality of notches 128 in the cam plate to maintain it in an adjusted position.
  • a lateral extension I25a of this cam plate may project through the frame and cover plates to facilitate the manipulation of the cam. If desired, a similar arrangement may be used to regulate the feed of the ratchet of the ink fountain roll heretofore described.
  • the ductor roll 55 of thelnk repellant applicator is likewise driven by the offset drum I8 through the cam I00 and the rocking lever I".
  • the lower arm of this rocking lever is connected by the link I" (Fig. 2) to a lever I3I pivoted on the shaft of the inking fountain roll 5
  • This lever at its upper end, is formed with a cam surface I32, which, for the most, part, is concentric about the axis of the fountain roll shaft.
  • This'cam surface coacts with a roller I35 on an arm rising from the yoke 59, which carries the yoke 51 supporting this-ductor roll.
  • the construction in this regard is similar to that heretofore described for the repellant ductor roll.
  • the roller I35 may be adjusted in a manner similar to the-roller Ill.
  • a spring "inormally maintains “the ductor roll in contact with the vfountain roll BI, but the cam III on its -movement in the left-hand direction (Fig. 2)
  • the lever Iii on the axis of the ink fountain roll shaft carries a Y pawl I31 spring-pressed against the ratchet wheel Ill, attached to the 4 fountainroll shaft.
  • the pawl and ratchet face in such direction that the movementtoward the left (Fig. 2) which carries themoveinent'of the link In to th'efleft and carries the. ductor roll into engagement with "the transfer roll, causesthe pawl to click idly over theratchet teeth,
  • the ink ductor is held by its spring in contact with the ink fountain during the .turning of the fountain roll, andxthus readily picks up a sufficient quantity of ink, andthereafter the ductor roll is shifted and positively held' in contact withthe transfer roll until the ink is transferred to that roller. 1- have found that. this makes a very satisfactory'transference of'ink from the fountain to the transfer roll and thence to the print-l ing plate.
  • the clip device illustrated at I" in Fig. 5. That is to say, the-left-handend of the yoke has a round hole in its upper arm for the reception of the projecting end of the ductor roll shaft, while at the right-hand end there is an open notch I to receive the shaft. Beyond the notch is the clip plate I havingan outw'ardiy curved upper end. As shown in Fig. 5,-
  • this clip plate is held in position by a com pression spring I42, which is compressed between the plate anda head I" on a stud carried by the yoke arm and projecting freely through a flared opening in the clip.
  • movable ductor between the formtair; roll and form roll, mechanism for operating the movable ductor comprising a swinging lever having a'concentric cam'acting on a swinging ductor support, whereby. the ductor may remain in contact with the member it engages for a relatively prolonged P riod. 4 .1
  • aiountain'roil having a ratchet; ,a-leverhaving a pawl to coact with the ratchet, an operating lever linked to the ratchet lever, and a cam on the operating wlever'adapted to engage an adjustably positioned member on theswinging support.
  • a repellant supply system having a-fountain roll, a ductor roll and a roll to receive material from the ductor, a rocking support for the ductor roll, a ratchet drive for-the fountain'roll, a rocking lever linked to the ratchet drive, and a cam on the lever engaging the rocki'ng support of.the ductor roll.
  • each of 'said feeds including a movable ductor roll mounted on a'swinging support, two pivoted arms having cam portions to engage the two ductor roll supports respectively, a rock shaft connected with the respective arms and a cam for operating the rock shaft.
  • the' combination with arepellant; supply system'and an ink supply system each having a fountain roll, a ductor roll and a roll to receive material from the ductor roll, ratchet drives for the two fountain rolls, an intermediately pivoted rocking lever linked at one end of one ratchet drive, and at the other'end to the other ratchet drive, a cam on the lever engaging the movable support of one ofthe ductor rolls and a cam on one of the ratchet drives engaging the-movable support of the other ductor.
  • a swinging support for the ductor comprising a yoke having a pair of arms occupied by the ductor roll shaft,
  • one of the arms having a hole to receive the shaft
  • the other arm having a notch, a movable spring to receive the ductor roll shaft at that end, said clip being held in position by a spring and adapted clip adjacent the latter arm and having a hole afountain roll and a material receiving roll, of an interposed ductorroll, and mechanism adapted to move'the ductor roll into contact with one of said rolls and interpose a non-yielding member positively blocking the ductor roll against return movement for an appreciable time while said mechanism continues its movement and performs another operation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
US229242A 1938-09-10 1938-09-10 Material applicator for planographic printing machines Expired - Lifetime US2165235A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE462025D BE462025A (xx) 1938-09-10
US229242A US2165235A (en) 1938-09-10 1938-09-10 Material applicator for planographic printing machines
FR915624D FR915624A (fr) 1938-09-10 1945-10-09 Applicateur de matière pour les machines à impression planographiques

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US229242A US2165235A (en) 1938-09-10 1938-09-10 Material applicator for planographic printing machines

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US2165235A true US2165235A (en) 1939-07-11

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2459922A (en) * 1946-12-27 1949-01-25 Goss Printing Press Co Ltd Liquid feed control, particularly for the ink feed of printing presses
US2465160A (en) * 1942-04-25 1949-03-22 Ditto Inc Duplicating apparatus
US2580667A (en) * 1947-10-21 1952-01-01 Time Inc Water motion for offset presses
US2672090A (en) * 1949-04-29 1954-03-16 Davidson Corp Dampening mechanism control means for rotary offset printing presses
US2689522A (en) * 1949-10-11 1954-09-21 Addressograph Multigraph Inking and moistening means for rotary planographic printing machines
US2915007A (en) * 1957-10-17 1959-12-01 Cottrell Company Dampening device for lithographic presses
US2915970A (en) * 1953-09-02 1959-12-08 Inking and dampening means for an offset printing machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465160A (en) * 1942-04-25 1949-03-22 Ditto Inc Duplicating apparatus
US2459922A (en) * 1946-12-27 1949-01-25 Goss Printing Press Co Ltd Liquid feed control, particularly for the ink feed of printing presses
US2580667A (en) * 1947-10-21 1952-01-01 Time Inc Water motion for offset presses
US2672090A (en) * 1949-04-29 1954-03-16 Davidson Corp Dampening mechanism control means for rotary offset printing presses
US2689522A (en) * 1949-10-11 1954-09-21 Addressograph Multigraph Inking and moistening means for rotary planographic printing machines
US2915970A (en) * 1953-09-02 1959-12-08 Inking and dampening means for an offset printing machine
US2915007A (en) * 1957-10-17 1959-12-01 Cottrell Company Dampening device for lithographic presses

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Publication number Publication date
FR915624A (fr) 1946-11-13
BE462025A (xx)

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