US3443516A - Rotary press with transfer roller interrupter - Google Patents

Rotary press with transfer roller interrupter Download PDF

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Publication number
US3443516A
US3443516A US572733A US3443516DA US3443516A US 3443516 A US3443516 A US 3443516A US 572733 A US572733 A US 572733A US 3443516D A US3443516D A US 3443516DA US 3443516 A US3443516 A US 3443516A
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US
United States
Prior art keywords
cylinder
blanket
printing machine
cam
axis
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Expired - Lifetime
Application number
US572733A
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English (en)
Inventor
Guenther Schnall
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.)
Agfa Gevaert AG
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Agfa Gevaert AG
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Publication date
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
    • B41F13/34—Cylinder lifting or adjusting devices
    • B41F13/36—Cams, eccentrics, wedges, or the like
    • 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 present invention relates to printing machines in general, and more particularly to improvements in a mechanism which may be utilized to select the position of a cylinder in a printing machine.
  • a rubber blanket cylinder normally rolls along a master cylinder and along a platen cylinder.
  • the foil of the master cylinder transfers inked images to the blanket of the blanket cylinder and the latter transfers such images to fresh copy sheets which are fed into the nip between the blanket and the platen cylinder.
  • the blanket cylinder is normally movable into and out of contact with the master cylinder and/ or platen cylinder so that the printing operation is interrupted when the blanket cylinder moves away from the platen cylinder and that the transfer of ink from the master cylinder is terminated when the blanket cylinder moves away from the master foil.
  • Another object of the invention is to provide a mechanism of the just outlined characteristics which can be adjusted to select the exact pressure between the blanket cylinder and one or both other cylinders.
  • a further object of the invention is to provide an offset printing machine which embodies the above outlined mechanism, wherein such mechanism occupies little room, and wherein the position of the blanket cylinder can be adjusted by exertion of a small force and in a very simple and time-saving manner.
  • An additional object of the invention is to provide an adjusting mechanism which, though especially suited for use in an offset printing machine, can be utilized with ad United States Patent Patented May 13, 1969 ice vantage in certain other types of printing machines as well as in all such apparatus wherein a rotary cylindrical body should be moved into rolling contact with one or more additional cylindrical or other bodies.
  • one feature of my invention resides in the provision of a printing machine whose frame supports two rotary cylindrical members having peripheral surfaces spaced from each other and a cylinder whose axis of rotation is parallel with the axes of the cylindrical members.
  • the cylinder is movable between first, second and third positions in which its peripheral surface respectively contacts the peripheral surface of neither, one and both cylindrical members and such movements of the cylinder are brought about by a novel mechanism including carrier means rotatably supporting the cylinder and movable therewith in directions normal to the axes of the cylindrical members, a biasing device for urging the carrier means to a position corresponding to one position of the cylinder (for example, to the third position in which the cylinder is in contact with both cylindrical members), and an operating device for moving the carrier means to a pair of additional positions respectively corresponding to the other two positions of the cylinder.
  • the printing machine also comprises a blocking unit which determines the minimum distance between the axis of the cylinder and the axes of the first and second cylinders.
  • the single figure of the drawing is a fragmentary side elevational view of an offset printing machine which embodies my invention, the front side wall of the machine frame having been removed.
  • the offset printing machine comprises a frame 1 which supports the shafts 17, 29 of two cylindrical members 2, 4 respectively constituting the image carrying or master cylinder and the impression or platen cylinder of the machine.
  • a third cylinder 3, called rubber blanket cylinder, is movable between three positions in the first of which its peripheral surface is out of contact with the peripheral surfaces of the cylindrical members 2 and 4, in the second of which its peripheral surface contacts the peripheral surface of the cylindrical member 2, and in the third of which its peripheral surface is in contact with the peripheral surfaces of both cylindrical members. This third position of the cylinder 3 is shown in the drawing.
  • the cylindrical member 2 carries on its periphery a master foil 5 which is formed with symbols representing letters, numerals, designs and/or other indicia and cooperates with the rollershaped applicator 6 of a customary inking unit which further comprises rollers 7, 8 and 9.
  • the machine also comprises a conventional wetting or moistening unit including a wetting roller 30 which is in contact with the master foil 5, a tank 32, and a Withdrawing roller 31 which dips into the tank 32 and transfers a film of moisture to the roller 30.
  • the cylindrical members 2 and 4 are driven in a counterclockwise direction, as viewed in the drawing.
  • the cylinder 3 is provided with a rubber blanket 10 and the cylindrical member 4 carries a conventional paper gripper 11 which withdraws fresh copy sheets 13 from a table 12 and delivers printed copy sheets into a tray 14.
  • the sheets 13 are imprinted during travel through the nip between the rubber blanket 10 (which receives ink from the master foil 5) and the peripheral surface of the cylindrical member 4.
  • the paper gripper 11 opens and closes automatically in response to rotation of the cylindrical member 4 and such opening and closing of the gripper is effected by a fixed cam (not shown which is mounted on the frane 1.
  • the shaft 15 of the cylinder 3 is parallel with the shafts 17, 29 of the cylindrical members 2, 4 and is rot-atable in carrier means including two specially configurated levers 16 (only one shown) which are adjacent to the opposite axial ends of the cylinder 3.
  • Each lever 16 is formed with an elongated slot 16a which receives with clearance a cylindrical enlargement or boss 18 on the shaft 17 of the cylindrical member 2.
  • the levers 16 are rockable about the axis of the shaft 17 and the slots 16a also enable these levers to move in directions at right angles to the shaft 17.
  • a biasing device here shown as a helical spring 19, is connected to the shaft 15 and to a fixed pin 20. The function of this spring 19 is to bias the carrier means (including the two levers 16) to a position corresponding to the aforementioned third position of the cylinder 3 in which the rubber blanket 10 contacts the peripheral surface of the cylindrical member 4 and the master foil on the cylindrical member 2.
  • a median portion of one of the levers 16 is provided with two mutually inclined faces 16b, 160 which preferably make with each other an angle of 90 degrees or thereabouts. These faces cooperate with an operating device which serves as means to move the lever 16 to two additional positions respectively corresponding to the first and second positions of the cylinder 3.
  • the operating device includes a disk-shaped cam 21 which is mounted on the eccentric shaft 22 parallel to the axis 17 and turnable by means of a manually operable actuating handle 23a.
  • the handle 23a has an elastic stem 23 which is secured to the shaft 22 and cooperates with a fixed detent device 24 having three recesses or notches 24a, 24b, 240.
  • the peripheral surface of the cam is preferably out of contact with the faces 16d, 160 so that the spring 19 is free to maintain the cylinder 3 in the third position, i.e., in a position which the cylinder 3 assumes when the printing machine is in actual use.
  • the cylinder 3 will be moved to such (second) position prior to actual printing so that the blanket 10 is properly inked and will transfer clear and sharp imprints to the very first fresh copy sheet 13.
  • the stem 23 By causing the stem 23 to snap into the notch 24a (position N), the operator maintains the cylinder 3 out of contact with the cylindrical members 2 and 4.
  • the cylinder 3 will be held in such (first) position when the printing machine is idle. This insures that the blanket 10 and/ or the foil 5 cannot undergo localized deformation which could develop in response to long-lasting abutment of the blanket against the foil and against the member 4 when the drive of the printing machine is at a standstill.
  • the cam 21 In the position V of the handle 23a, the cam 21 bears against the face 16b and keeps the blanket 10 away from the cylindrical member 4. In the position N of the handle 23a, the cam 21 bears against the faces 16b, 16c and keeps the blanket 10 away from the cylindrical member 4 as well as from the foil 5.
  • the cam 21 can engage the face 16b and/or 16c in the position D of the handle 23a if the face of this cam is finished with sufficient precision to allow for satisfactory contact between the cylinder 3 (blanket 10) and the cylindrical members 2 and 4.
  • the printing machine also comprises a blocking unit which serves to determine the minimum distance between the cylinder 3 and the cylindrical members 2, 4 to thereby control the pressure upon the blanket 10 and master foil 5.
  • the blocking unit comprises a first supporting element 25 which is fixed to or integral with the lever 16, a second supporting element 28 which is fixed to the frame 1 and is provided with two stop surfaces 28a, 28b, and two adjustable followers 26, 27 which are mounted on the supporting element 25.
  • the followers 26, 27 are shown as screws whose heads respectively abut against the stop surfaces 28a, 28b when the handle 23a is held in the position D.
  • the stop surface 28b is of arcuate shape and its center of curvature is located on the axis of the cylindrical member 2.
  • the operator can select in advance the maximum compression of the blanket 10 under the action of the spring 19.
  • the cam 21 rocks the lever 16 in a clockwise direction whereby the follower 26 moves away from the stop surface 28a but the follower 27 slides along the surface 28! so that the distance between the shafts 15 and 17 remains unchanged.
  • the handle 23a causes the cam 21 to move the shaft 15 away from the shaft 17 so that the follower 27 also moves away from the stop surface 28b.
  • stop surface 28a is located in a plane which is normal to the line connecting the axes of the shafts 15, 29 and if the surface 28b is located in a plane which is normal to the line connecting the axes of the shafts 15, 17.
  • the movements of the cylinder 3 away from the cylindrical member 2 and/or 4 are rather small so that such shaping of the stop surfaces 28a, 28b normally insures satisfactory transfer of images to the blanket cylinder (position V) and to the copy sheets 13 (position D).
  • the detent device 24 can be replaced by other suitable detent devices which are capable of releasably holding the cam 21 in one of its three positions.
  • the spring 19 can be replaced by one or more torsion springs or analogous resilient elements which can permanently urge the levers 16 and the cylinder 3 to a desired position. It is also within the purview of the present invention to mount the levers 16 of the carrier means on the shaft 29 of the cylindrical member 4.
  • first and second rotary cylinder members having peripheral surfaces spaced from each other; a cylinder having an axis of rotation parallel with the axes of said members and being movable between first, second and third positions in which its peripheral surface respectively contacts the peripheral surface of neither, one, and both of said members; carrier means rotatably supporting said cylinder and movable therewith in direction normal to said axis, said carrier means comprising two mutually inclined faces; biasing means cooperating with said carrier means for urging the latter to a position corresponding to one position of said cylinder; and an operating device for moving said carrier means to a pair of additional positions respectively corresponding to the other two positions of said cylinder, said operating device comprising a cam movable between three positions in one of which said cam permits said biasing means to maintain said carrier means in said one position, in another of which said cam bears against at least one of said faces to maintain said carrier means in one of said additional positions and in a third of which said cam bears at least against the other of said faces to maintain
  • first and second cylindrical members and said cylinder respectively constitute the master cylinder, the platen cylinder and the blanket cylinder of an olfset printing machine.
  • a structure is set forth in claim 1, wherein said carrier means is rotatable about the axis of one of said cylindrical members.
  • said biasing device comprises resilient means connected with said carrier means and arranged to bias said cylinder to the third position thereof.
  • said first cylindrical member comprises a shaft and said carrier means comprises lever means having elongated slot means receiving said shaft with such clearance that the carrier means is rockable on and can move transversely of said shaft.
  • one of said stop surfaces is a curved surface having its center of curvature on the axis of one of said cylindrical members.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
US572733A 1965-08-19 1966-08-16 Rotary press with transfer roller interrupter Expired - Lifetime US3443516A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA50057A DE1265759B (de) 1965-08-19 1965-08-19 Vorrichtung zum An- und Abstellen des Offsetzylinders an Rotations-Buerooffsetdruckmaschinen

Publications (1)

Publication Number Publication Date
US3443516A true US3443516A (en) 1969-05-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
US572733A Expired - Lifetime US3443516A (en) 1965-08-19 1966-08-16 Rotary press with transfer roller interrupter

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US (1) US3443516A (de)
DE (1) DE1265759B (de)
GB (1) GB1147778A (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3593662A (en) * 1967-09-26 1971-07-20 Gestetner Ltd Cylinder arrangement for an offset litho machine
US3757689A (en) * 1971-09-13 1973-09-11 Roland Offsetmaschf Adjustable assembly for a dampening roller of an offset printing press
US4147126A (en) * 1976-01-15 1979-04-03 Imperial Chemical Industries Limited Coating apparatus
EP0095819A2 (de) * 1982-06-02 1983-12-07 Stork Brabant B.V. Druckapparat, insbesondere für das Aufbringen von Lack
EP0125670A2 (de) * 1983-05-16 1984-11-21 Jürgen Schulz Druckwerk
US4528904A (en) * 1983-10-24 1985-07-16 Ackley E Michael Ink reservoir removing and inserting structure for article marking apparatus
US5060568A (en) * 1981-02-26 1991-10-29 Veb Kombinat Polygraph "Werner Lamberz" Leipzig Distributing roller unit and printing mechanism provided therewith
US5690029A (en) * 1994-10-08 1997-11-25 Heidelberger Druckmaschinen Ag Rubber-blanket cylinder engagement and disengagement device
US20090078135A1 (en) * 2007-09-25 2009-03-26 Gallus Druckmaschinen Gmbh Printing Unit, Printing Press and Method of Producing Labels or Self-Adhesive Labels in a Printing Press
US20090223394A1 (en) * 2008-03-10 2009-09-10 Gallus Druckmaschinen Gmbh Printing Unit, Printing Press and Process for Producing Labels in a Printing Press

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19543494C1 (de) * 1995-11-22 1997-05-15 Roland Man Druckmasch Einstellvorrichtung für Druckwerkzylinder

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1193045A (en) * 1916-08-01 miles
US1718900A (en) * 1927-04-06 1929-06-25 Fischer Ferdinand Offset printing machine
US2986086A (en) * 1959-02-27 1961-05-30 Miller Printing Machinery Co Antifriction eccentric journaling mounting for rotatable member
US3209685A (en) * 1963-04-04 1965-10-05 Harris Intertype Corp Roller support
US3366048A (en) * 1964-05-08 1968-01-30 Rotaprint Gmbh Cylinder interrupter for a rotary offset printing and duplicating machine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1107843A (en) * 1914-03-25 1914-08-18 Miehle Printing Press & Mfg Trip mechanism for printing-presses.
DE480160C (de) * 1927-04-06 1929-08-02 Rotaprint Gmbh Bureau-Gummidruckmaschine
US2568761A (en) * 1946-03-22 1951-09-25 Miehle Printing Press & Mfg Pressure adjustment and trip for printing cylinders
GB649153A (en) * 1948-04-13 1951-01-17 Leathley Publications Ltd Improvements in or relating to printing machines
US3150588A (en) * 1961-05-25 1964-09-29 Block & Anderson Ltd Cylinder mounting, adjusting and interrupting means for offset printing and like machines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1193045A (en) * 1916-08-01 miles
US1718900A (en) * 1927-04-06 1929-06-25 Fischer Ferdinand Offset printing machine
US2986086A (en) * 1959-02-27 1961-05-30 Miller Printing Machinery Co Antifriction eccentric journaling mounting for rotatable member
US3209685A (en) * 1963-04-04 1965-10-05 Harris Intertype Corp Roller support
US3366048A (en) * 1964-05-08 1968-01-30 Rotaprint Gmbh Cylinder interrupter for a rotary offset printing and duplicating machine

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3593662A (en) * 1967-09-26 1971-07-20 Gestetner Ltd Cylinder arrangement for an offset litho machine
US3757689A (en) * 1971-09-13 1973-09-11 Roland Offsetmaschf Adjustable assembly for a dampening roller of an offset printing press
US4147126A (en) * 1976-01-15 1979-04-03 Imperial Chemical Industries Limited Coating apparatus
US5060568A (en) * 1981-02-26 1991-10-29 Veb Kombinat Polygraph "Werner Lamberz" Leipzig Distributing roller unit and printing mechanism provided therewith
EP0095819A2 (de) * 1982-06-02 1983-12-07 Stork Brabant B.V. Druckapparat, insbesondere für das Aufbringen von Lack
EP0095819A3 (de) * 1982-06-02 1985-05-15 Stork Brabant B.V. Druckapparat, insbesondere für das Aufbringen von Lack
EP0125670A2 (de) * 1983-05-16 1984-11-21 Jürgen Schulz Druckwerk
EP0125670A3 (en) * 1983-05-16 1985-09-18 Jurgen Schulz Printing method and device
US4528904A (en) * 1983-10-24 1985-07-16 Ackley E Michael Ink reservoir removing and inserting structure for article marking apparatus
US5690029A (en) * 1994-10-08 1997-11-25 Heidelberger Druckmaschinen Ag Rubber-blanket cylinder engagement and disengagement device
US20090078135A1 (en) * 2007-09-25 2009-03-26 Gallus Druckmaschinen Gmbh Printing Unit, Printing Press and Method of Producing Labels or Self-Adhesive Labels in a Printing Press
US8505450B2 (en) 2007-09-25 2013-08-13 Gallus Druckmaschinen Gmbh Printing unit, printing press and method of producing labels or self-adhesive labels in a printing press
US20090223394A1 (en) * 2008-03-10 2009-09-10 Gallus Druckmaschinen Gmbh Printing Unit, Printing Press and Process for Producing Labels in a Printing Press
CN101531088B (zh) * 2008-03-10 2012-05-09 捷拉斯印刷机械有限公司 印刷装置和印刷机
US8499691B2 (en) 2008-03-10 2013-08-06 Gallus Druckmaschinen Gmbh Printing unit, printing press and process for producing labels in a printing press

Also Published As

Publication number Publication date
GB1147778A (en) 1969-04-10
DE1265759B (de) 1968-04-11

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