US3630145A - Angular and axial adjustment mechanism for a printing cylinder - Google Patents

Angular and axial adjustment mechanism for a printing cylinder Download PDF

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Publication number
US3630145A
US3630145A US44802A US3630145DA US3630145A US 3630145 A US3630145 A US 3630145A US 44802 A US44802 A US 44802A US 3630145D A US3630145D A US 3630145DA US 3630145 A US3630145 A US 3630145A
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US
United States
Prior art keywords
gearwheel
cylinder
angular
axial
double
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
US44802A
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English (en)
Inventor
Pierre Leuenberger
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.)
Creusot Loire SA
Original Assignee
Creusot Loire SA
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 Creusot Loire SA filed Critical Creusot Loire SA
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Publication of US3630145A publication Critical patent/US3630145A/en
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Classifications

    • 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
    • B41F13/10—Forme cylinders
    • B41F13/12—Registering devices
    • B41F13/14—Registering devices with means for displacing the cylinders
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/1956—Adjustable

Definitions

  • This invention relates to an angular and axial adjustment system for a printing cylinder, intended more particularly for multicolor offset or typographic rotary presses.
  • Multicolor printing requires accurate register of each color and in rotary web presses relative adjustment for each plate is carried out in two coordinates, i.e. transversely and longitudinally of the printed web.
  • the transverse or margin adjustment is produced by transverse displacement of the plate cylinder with respect to the machine frames.
  • the longitudinal or register adjustment is produced by angular shift of the plate cylinder with respect to the general line of drive of the machine.
  • the helical gearwheel of the main gearing transmits a considerable torque and this results in unbalanced transverse reaction forces which in turn result in rotational irregularities in the sliding coupling sufficient to have an adverse effect on the accuracy of adjustment. This disadvantage is particularly serious in fourcolor offset printing.
  • the present invention relates to a system whereby the margin and register adjustment controls can be disposed on the same side of the machine, neither adjustment is adversely affected by the other, and no sliding assembly is required in the drive torque transmission to the printing cylinder.
  • each printing cylinder comprises a nonrotating axial displacement control member connected to one of the cylinder trunnions by a coupling without transverse play but allowing free rotation of the trunnion, and in which each printing cylinder is rotated by a system comprising a first gearwheel rigidly connected to one of the cylinder trunnions, a second gearwheel mounted loosely on the same trunnion and forming one of the parts of the general line of drive of the machine, one of these two gearwheels being a helical gearwheel, the other being a spur placement of the loose double gearwheel is rigidly secured to the control member for the transverse displacement of the cylinder.
  • the single FIGURE is a cross section through the axis of a printing cylinder.
  • the printing cylinder 1 has trunnions 2 and 3 at each end.
  • the trunnion 2 is supported in a frame 4 by a bearing 5 fitted into a box 6 held in the frame by means of a ring 7 and screws 8.
  • the trunnion 3 is supported in a frame 10 by a bearing 11 fitted into a box 12 which is slidable in its housing in the frame 10. Its movement is limited by a circlip l3 and a ring 14 secured to the frame by screws 15.
  • a helical gearwheel 18 is keyed on the trunnion 2.
  • a spur gearwheel 19 is mounted loosely on the hub of the gearwheel 18, a self-lubricating ring 20 being interposed.
  • Gearwheel l9 meshes with gearwheel 21 forming part of the general line of drive of the machine.
  • the margin adjustment system comprises a cap 23 secured to the box 12 and having a screw-threaded aperture 24 in line with the axis of the trunnion 3.
  • a rod 25 is secured by a collar 26 between a plate 27 and a cap 28 secured to the plate 27 by screws 29. Rings 30 allow free rotation of the rod 25 in this assembly.
  • Plate 27 is connected to frame 10 by three screws 31 and three tubular struts 32.
  • the rod 25 has a screw-threaded end 33 engaging in the screw-threaded aperture 24 in the cap 23 while its other end extending through the machine cover 35 bears a control knob 36.
  • a rod extends form one side of the machine to the other and its axis is parallel to the axis of the cylinder 1.
  • the rod 40 On the drive side, the rod 40 is supported by a ring 41 in the frame 4 and by a ring 42 on a yoke 43 which is secured to the frame 4 by screws 44. Rod 40 can slide without rotating in the rings 41 and 42.
  • the rod 40 extends through the frame 10 via an aperture 45 and is formed with a screw-threaded bore 46 at its end on the control mechanism side.
  • the rod 40 bears a double gearwheel 50 having two sets of teeth 51 and 52 mounted loosely on the two bearings 53 and 54.
  • the gearwheel is held transversely on the rod 40 by a shoulder and circlip assembly.
  • the helical gearwheel 51 meshes with gearwheel 18.
  • a spur gearwheel 52 meshes with gearwheel 19.
  • the other end of rod 40 is freely engaged in a bore 55 formed in an extension 56 of the cap 23.
  • the screw-threaded end 57 of a rod 58 is engaged in the screw-threaded aperture 46 and is held fixed and so as to be free to rotate in a similar manner as the rod 25, by means of the collar 59, plate 60, cap 61 and rings 62. Plate is secured to the extension 56 of the cap 23 by screws 63.
  • the rod 58 extends through the machine cover 35 and bears a control knob 64.
  • the gearwheel 19 connected to the general line of drive of the machine has a high inertia and remains stationary.
  • the relative angular displacement is therefore effected by rotation of the gearwheel 18 and hence of the cylinder 1.
  • the rod 25 remains stationary transversely with respect to the frame but results in displacement of the cap 23 and transverse sliding of the box 12 in the frame, resulting in transverse displacement of the printing cylinder assembly 1.
  • the outer cage of the bearing 5 slides in the bore inside the bearing box 6.
  • the extension 56 of the cap 23 produces an identical displacement of the entire register adjustment mechanism, and more particularly displacement of the double gearwheel 50. There is therefore no relative displacement of the gearwheel 50 with the gearwheels l8 and 19 and the initial register adjustment is fully retained.
  • the two gearwheels l8 and 19 could also both be helical gearwheels provided that the helix angles of the two sets of teeth are different. lf the actual direction of the helix is reversed, it would be possible in this way to obtain a differential effect which would increase the accuracy of the adjustment.
  • Angular and axial adjustment mechanism for a printing cylinder of a rotary press comprising bearings for each cylinder which is to be adjusted, said bearings supporting the cylinder trunnions and including first means for with respect to the machine frames, a control member, a coupling means connecting said control member to one of the said cylinder trunnions so as to prevent axial play but allow free rotation of said trunnions, second means to displace said control member and thus said cylinder with respect to said frames in a direction parallel to the axis of said cylinder, trunnion and forming one of the parts of the general line of drive of the machine, one of these two gearwheels being a helical gearwheel, the other being a helical gearwheel having a different helix angle from that of the first gearwheel, a double gearwheel comprising two sets of teeth respectively meshing with said first and said second gearwheels, third means for freely mounting said double gearwheel for rotation about a shaft while maintaining said double gearwheel in fixed

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
US44802A 1969-07-04 1970-06-09 Angular and axial adjustment mechanism for a printing cylinder Expired - Lifetime US3630145A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6922715A FR2053438A5 (enrdf_load_stackoverflow) 1969-07-04 1969-07-04

Publications (1)

Publication Number Publication Date
US3630145A true US3630145A (en) 1971-12-28

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ID=9036961

Family Applications (1)

Application Number Title Priority Date Filing Date
US44802A Expired - Lifetime US3630145A (en) 1969-07-04 1970-06-09 Angular and axial adjustment mechanism for a printing cylinder

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US (1) US3630145A (enrdf_load_stackoverflow)
DE (1) DE2028387A1 (enrdf_load_stackoverflow)
FR (1) FR2053438A5 (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3896724A (en) * 1973-01-26 1975-07-29 Adamovske Strojirny Np Apparatus for the adjustment of a form cylinder
US3934502A (en) * 1973-01-24 1976-01-27 Morrison Machine Co. Adjustable rotary screen printer with air-biased squeegees
US5211111A (en) * 1992-07-29 1993-05-18 Halm Industries Co., Inc. Printing press having means for indexing plate cylinder
US5357860A (en) * 1992-03-27 1994-10-25 Komori Corporation Cylinder phase adjustment controlling apparatus for printing press
US5511874A (en) * 1992-07-27 1996-04-30 Kabushiki Kaisha Kobe Seiko Sho Drive transmission mechanism for biaxial extruder

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1850800A (en) * 1930-11-12 1932-03-22 Samuel M Langston Co Printer and slotter
US2002584A (en) * 1933-11-17 1935-05-28 Washington Machinery And Suppl Printing press roll shifting means
US2260402A (en) * 1936-08-20 1941-10-28 Potdevin Machine Co Printing machine
US2425914A (en) * 1944-03-23 1947-08-19 Duplex Printing Press Co Double adjustment for plate cylinders
US2539068A (en) * 1946-08-12 1951-01-23 Nelson E Funk Cylinder adjusting mechanism for multicolor printing presses

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1850800A (en) * 1930-11-12 1932-03-22 Samuel M Langston Co Printer and slotter
US2002584A (en) * 1933-11-17 1935-05-28 Washington Machinery And Suppl Printing press roll shifting means
US2260402A (en) * 1936-08-20 1941-10-28 Potdevin Machine Co Printing machine
US2425914A (en) * 1944-03-23 1947-08-19 Duplex Printing Press Co Double adjustment for plate cylinders
US2539068A (en) * 1946-08-12 1951-01-23 Nelson E Funk Cylinder adjusting mechanism for multicolor printing presses

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3934502A (en) * 1973-01-24 1976-01-27 Morrison Machine Co. Adjustable rotary screen printer with air-biased squeegees
US3896724A (en) * 1973-01-26 1975-07-29 Adamovske Strojirny Np Apparatus for the adjustment of a form cylinder
US5357860A (en) * 1992-03-27 1994-10-25 Komori Corporation Cylinder phase adjustment controlling apparatus for printing press
US5511874A (en) * 1992-07-27 1996-04-30 Kabushiki Kaisha Kobe Seiko Sho Drive transmission mechanism for biaxial extruder
US5211111A (en) * 1992-07-29 1993-05-18 Halm Industries Co., Inc. Printing press having means for indexing plate cylinder

Also Published As

Publication number Publication date
DE2028387A1 (de) 1971-03-25
FR2053438A5 (enrdf_load_stackoverflow) 1971-04-16

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