US3727551A - Reversible lockup for flexible printing plate - Google Patents

Reversible lockup for flexible printing plate Download PDF

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Publication number
US3727551A
US3727551A US00165068A US3727551DA US3727551A US 3727551 A US3727551 A US 3727551A US 00165068 A US00165068 A US 00165068A US 3727551D A US3727551D A US 3727551DA US 3727551 A US3727551 A US 3727551A
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United States
Prior art keywords
shaft
gripper
plate
groove
cylinder
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Expired - Lifetime
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US00165068A
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English (en)
Inventor
E Kostas
R Schwarz
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Boeing North American Inc
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North American Rockwell Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1218—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices
    • B41F27/1225—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly
    • B41F27/1243—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly by pivotal or swivelling motion, e.g. by means of a rocking lever

Definitions

  • ABSTRACT A lockup for securing a flexible printing plate to a reversibly driven plate cylinder in which the leading end of the plate may be held in a reference position and in which the trailing end of the plate may be kept under constant tension regardless of the direction of cylinder rotation,
  • a longitudinal groove is formed in the cylinder having undercut edges with a roekable shaft being mounted in the groove having a gripper extending longitudinally of the shaft and presenting gripping edges facing in opposite directions.
  • An overcenter spring toggle detents the shaft in two positions in which the gripper lies on one side or the other of the center of the groove, manual throw-over means being provided for throwing the shaft between its detented positions so that, when a first end of the plate is hooked over one of the undercut edges and the second end of the plate is placed in the path of movement of the gripper, manual throw-over causes the gripper to swing into gripping engagement with the second end of the plate to keep the plate under constant tension on the cylinder
  • the gripper is in the form of a leaf spring partially recessed in the shaft and symmetrical stops are provided for limiting rocking movement of the shaft in both directions.
  • the construction is usable both with heavy plates which tend to unroll and light plates which tend to tear.
  • FIG. 1 is a fragmentary elevation of a printing cylinder employing the present invention following installation of a plate but prior to lockup.
  • FIG. 2 is a view similar to FIG. 1 but showing the mechanism thrown to its alternate or locked-up condition.
  • FIG. 3 is a fragmentary elevational view, in partial section, looking along the line 3-3 in FIG. 1.
  • FIGS. 4 and 4a are fragmentary sections showing the initial engagement of the trailing edge of the plate upon rotation of the shaft and the stressing of the leaf spring which occurs by reason of further rotation of the shaft.
  • FIGS. 5 and 6 correspond to FIGS. 1 and 2 but show the manner in which the plate is clamped for reverse rotation of the cylinder.
  • FIG. 7 is a diagram showing the variation in torque and force on the plate brought about by different adjustment of the toggle springs with the stops in the preferred remote position.
  • FIG. 8 is a diagram similar to FIG. 7 but showing the effect of employing stops in a near position.
  • a plate cylinder indicated at 10 has ends 11, 12 and an outer surface 13.
  • the cylinder is journaled for rotation on stubshafts I5, 16 fitted in suitable journals in the press frame.
  • Formed in the surface of the cylinder is a longitudinally extending groove 20 having symmetrically arranged undercut edges 21, 22, the groove below the undercut edges being formed as a bore defining a longitudinally extending cavity 23 having a cylindrical wall 24.
  • Mounted upon the cylinder is a flexible printing plate 30 having a first hooked end 31 which engages the undercut edge 21 and a second hooked end 32 which passes over the edge 22 of the cylinder and into the recess 23.
  • the hooked end 31 may be considered as the leading end and the end 32 as the trailing end.
  • a rockable shaft is mounted in the space 23 having a gripper mounted thereon which extends longitudinally of the shaft and which presents gripping edges facing in opposite directions, the shafthaving an overcenter spring toggle for detenting the shaft into positions in which the gripper lies on one side or the other of the groove so that when a first or leading end of the plate is hooked over one of the undercut edges and a second endof the plate is placed in the path of movement of the gripper, throw-over of the shaft to its alternate position causes the gripper to swing into gripping engagement with the second or trailing end of the plate thereby to keep the plate under constant tension as the press is operated.
  • the roles of the gripping edges are correspondingly reversed and throw-over is in the reverse direction, without requiring any modification or adjustment of the structure.
  • a shaft 40 of circular cross section is provided having ends 41, 42 which are fitted for attachment of the throw-over tool, being hexagonally shaped in the present instance.
  • the shaft 40 is journaled for rocking action in a central bushing 43 and in corresponding end bushings 44, 45, which bushings are interrupted, or C-shaped, as indicated at 46 and held in registering phase position by respective set screws 47 for clearance of the longitudinal gripping member to be described. Since the bushings extend substantially more than 180 about the shaft, the shaft is held effectively captive, as if encircled by continuous bushings.
  • a gripper element 50 of T-shape presenting edges 51, 52 which extend, peripherally of the shaft, in opposite directions.
  • the gripper is held in place in the shaft by means of a set of pins 55 which extend diametrically.
  • the shaft has, secured to its near" end as viewed in FIGS. 1 and 2, an arm 60 which is pinned by means of a pin 61 to a toggle link or rod 62, the end of which is both slidable and rockable in a guide or poppet 63, the latter having an integral stubshaft 64 (FIG. 3) parallel to the cylinder axis and which is fitted in a bore 65.
  • a spring 66 Surrounding the rod 62 is a spring 66 which is seated against the guide 63 at one end and which, at its other end, bears against an adjusting nut 67 which is threaded on the rod and which has an accompanying lock nut 68.
  • any suitable means may be employed for maintaining the arms 60, 60a in the same phase relation to the shaft; for example, the arms may be pinned to the shaft by through pins 59, 59a (FIG. 3). Providing separate spring toggles at each end of the shaft, adjusted for the same torque characteristic, minimizes the effect of torsional twisting of the shaft.
  • the gripper 50 is made of resilient construction in the form of a single or composite leaf spring mounted in a recessed position in a longitudinal groove formed in the shaft 40.
  • the groove, indicated at 70 is preferably of V-crosssection extending deeply into the shaft, almost to the center, and the gripper 50 is of composite construction being formed of two leaves of spring steel 71, 72, each of which is of inverted L-shape arranged back to back and securely mounted in the root 73 of the groove. Making the gripper of resilient construction tends to equalize the forces applied from point to point along the hooked end 52 of the plate.
  • stop surfaces are provided for limiting the range of swing of the arms60, 60a in each direction beyond the dead center position 69.
  • the stop function is taken care of by a single stop member for the arm 60 which cooperates with stop surfaces 81, 82 on the arm.
  • the stop 80 may be in the form of a cap screw which is screwed into a threaded hole provided in the end wall 11 of the cylinder. It will be understood that at the opposite end of the cylinder a similar stop member (not shown) is provided cooperating with similar stop surfaces in identical phased relation.
  • the stop and stop surfaces are so positioned that bottoming on the stop does not occur when the gripper is in tensioning engagement with the trailing end of the plate so that the force of the toggle spring 66 is constantly effective to produce tensioned take-up of the plate as elongation occurs particularly during the initial portion of a press run. That is, the stop elements are, in the preferred embodiment located remotely so as not to be engaged during normal running of the press while, nonetheless, permitting bottoming to occur when the gripper is thrown to its inactive or backed-off position. The stop surfaces therefore tend to severely limit the overtravel of the gripper in the backed-off direction which would occur if the toggle spring 66 were allowed to expand fully into its non-stressed state.
  • FIGS. 1 and 2 The effect of the stop surfaces will be made clear upon comparing FIGS. 1 and 2. It will be assumed in these figures that the plate cylinder is to operate in the counterclockwise direction.
  • the plate 30 is assembled on the cylinder so that the leading end 31 thereof is hooked over the undercut edge 21 while the trailing end 32 of the plate is inserted into the groove into the relief space 23 (see FIG. 4) which is in the path of clockwise movement of the gripper 50.
  • the shaft 40 is in its backed-off condition, with the link 62 and its spring 66 being above the center line 69, which forces the stop surface 81 into bottoming engagement with the stop member 80.
  • FIG. 4 shows the condition of initial engagement between the gripper and the end of the plate.
  • the shaft 40 is rocked an additional amount clockwise which is accompanied by bending of the leaf spring elements 71, 72 which together form the gripper.
  • the stop surface 82 on the arm is so positioned with respect to the stop 80 that when using a plate of a given nominal length the end of the plate obstructs further rocking movement of the gripper shaft prior to occurrence of bottoming at the stop surface.
  • the stop in such circumstances, may be referred to as a remote" stop. That is to say, the stop is sufficiently remote from its cooperating stop surfaces so that it lies beyond the stop surfaces when the lockup is in its. working position.
  • the force developed in the toggle spring 66 is fully effective to provide follow-up movement of the arm 60, and the associated gripper, as the plate increases slightly in length, either due to the ironing effect upon the cylinder which occurs during the first few revolutions of the plate cylinder and cooperating blanket cylinder (not shown) or the elongation which may occur incident to a long press run.
  • the remote stop is to be distinguished from what might be termed a near stop arrangement in -which bottoming occurs when the gripper is in its stressed working position.
  • the present invention in its broader aspects contemplates both possibilities.
  • One of the advantages of employing a remote stop arrangement is that the force which is exerted upon the trailing end of the plate may be easily and quickly varied by rotation of the adjusting nuts 67 which vary the degree of pre-stress of the toggle springs 66, 66a.
  • the torque applied by the arm 60 upon the shaft may be increased, as may be required when using thick plates having high inherent strength.
  • the adjusting nut 67 maybe appropriately backed-off to reduce the pre-stress in the toggle spring 66 so that a lesser degree of torque is applied by the arm 60 to the gripper shaft. It will be understood that whether the degree of pre-stress in the toggle spring arrangement is increased or decreased, the adjustment of the nuts 67, 67a at the respective ends of the shaft will be coordinated so that an equal torque is applied to the gripper shaft at each ofits ends.
  • the relationship of the torque exerted by the springs 66, 66a and thetorque exerted by the gripper spring on the plate using a remotely located stop is graphically illustrated in FIG. 7.
  • the torque exerted by the springs 66, 66a upon the shaft 40 is indicated by the curve 90, the torque being plotted as the ordinate with the shaft movement from dead center as abscissa.
  • the torque rises from zero at the dead center position, indicated at 91, along a rather steeply rising curve which reaches a maximum value with some drop-off, due to release of stress in the spring 66, as the shaft is additionally rotated.
  • the "remote position of the stop is illustrated by the vertical dashed line 95 which, as will be noted, lies beyond the point of intersection A by an amount 96 which corresponds to the spacing, between the stop surface 82 and the stop member shown in FIG. 2.
  • the torque in the gripper which corresponds to the force on the plate in the condition of equilibrium, is indicated in the diagram at D.
  • the degree of pre-stress in the spring 66 may be increased by screwing down upon the nut 67 resulting in a higher torque curve which has an intersection B with respect to the gripper spring characteristic 93. This corresponds to a greater equilibrium torque E and a correspondingly higher force applied to the end of the plate. Conversely, backing off the adjusting nut with respect to the toggle spring 66 drops the curve so that it intersects curve 93 at point C which corresponds to a lesser torque and lesser applied force F. It will be seen, then, that with a:
  • the curve 93 is that of a plate of a certain nominal length. There will be normal small variations in plate length, giving a gripper spring characteristic 97 for plates which are slightly short and 98 for plates which are slightly long. It will be noted, however, that in spite of variations in plate length, accompanied by lateral shifting of the points A, B and C in one direction or the other, as shown, there are only minor changes in the torque values E, D and F and therefore only minor changes in the forces applied to the plate for the three illustrated degrees of stress in the toggle springs.
  • FIG. 7 The portion of FIG. 7 which has been discussed is applicable to rotation of the plate cylinder in the counterclockwise direction in which the toggle lies outside of the line of dead center 69 when the gripper is backedoff (FIG. 1) and inside of the line 69 when the gripper is stressed with the plate locked up.
  • the invention is not limited thereto and the structure is susceptible to operation in a bottoming mode in which the bodily stressing of the gripper spring is relied upon to secure tensioned follow up as well as equalization of stress along the end of the plate.
  • the torque curve of the toggle springs is indicated at 100 and the torque characteristic of the gripper spring is indicated atl03. This results in a tendency to achieve equilibrium at an intersection point H corresponding to a torque and force upon the plate indicated at K.
  • the stop 80 and the engaged stop surface 81 are located in a near" position, indicated at 105 in FIG.
  • the shaft cannot rotate beyond the stop and thus the point of equilibrium H is not achieved. Instead, the degree of flexure of the gripper spring is limited to an amount G which corresponds to a torque in the gripper spring, and a force applied to the plate, which is equal to the amount J.
  • the stop 80 and stop surface 81 may be tailored to obstruct the shaft at the point 106, thereby limiting flexure of the gripper spring to that indicated at 1, corresponding to a reduced torque, and force against the plate, indicated at L in the figure. Effective movement of the location of the stop while preserving symmetry may be readily achieved by employing a cap screw 80 having a larger head provided, of course, that the arm 60 is accurately relieved to provide clearance for the larger head.
  • the spring characteristics 100, 103 have counterclockwise counterparts 100', 103 in the lower lefthand quadrant, all of the other corresponding letters and numerals being similarly primed.
  • gripper or gripper spring
  • the gripper need not be continuous but may consist of a number of separate sections arranged end to end.
  • gripper spring has been illustrated as two spring laminations arranged back to back, it will be apparent that the spring may, if desired, be formed of a single thickness of metal but presenting gripping edges extending in opposite peripheral directions. Or, alternatively, where separate gripper elements are used it will be apparent that they need not be closely engaged back to back but may be slightly separated without departing from the present invention.
  • the lockup is symmetrical bi-directional, but it will be apparent to one skilled in the art that the construction may be used with advantage even in plate cylinders which rotate in a single direction.
  • plate is intended to be a general term broad enough to cover any flexible sheet of durable material intended to be tightly fitted to the surface of a cylinder and hooked or bent for attachment at the leading and trailing ends.
  • the gripper leaf spring is intended primarily for the purpose of distributing tensioning force along the leading end of the plate in spite of minor inaccuracies in the forming of the bend, it will be appreciated by one skilled in the art that, when using remote" stops, the springs 50, 66 are effectively in series with one another so as to increase the amount of available take up beyond that which would be provided by one of the springs used alone.
  • the lockup described above has been found to be highly economical, consisting of a minimum number of parts, with these parts being simply formed, to minimize the cost of manufacture and installation and providing a long life, substantially maintenance free.
  • a lockup for holding a flexible printing plate having hooked ends the combination compromising a reversible plate cylinder defining a longitudinal groove having undercut edges, a rockable shaft in the groove extending along the length thereof, a gripper mounted on shaft extending longitudinally and presenting gripping edges facing in opposite directions, means including an overcenter toggle spring for detenting the shaft in two positions in which the the gripper lies on one side or the other of the center of the groove, and throw-over means for manually throwing the shaft between its detented positions so that when a first end of the plate is hooked over one of the undercut edges and the second end of the plate is placed in the path of movement of the gripper, operation of the throw-over means causes the gripper to swing into gripping engagement with the second end of the plate, the gripper being in the form of a leaf spring of T-eross-section having a central leg secured along its inner edge to the shaft and having arms extending in opposite directions.
  • a lockup for holding a flexible printing plate having hooked ends comprising a reversible plate cylinder defining a longitudinal groove having undercut edges and a cylindrical inner wall, a rockable shaft in the groove extending along the length thereof. longitudinally spaced bushings interposed between the shaft and the wall of the groove to provide bearing surfaces for the shaft, a gripper mounted on the shaft and extending longitudinally of the shaft presenting gripping edges facing in opposite directions, means including an overcenter toggle spring for detenting the shaft in two positions in which the gripper lies on one side or the other of the center of the groove, and throw over means for manually throwing; the shaft between its detented positions, the bushings being relieved adjacent the undercut edges and in the path of movement of the gripper to ,provide clearance for the gripper as the gripper moves into its respective detented posi tions.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
US00165068A 1971-07-22 1971-07-22 Reversible lockup for flexible printing plate Expired - Lifetime US3727551A (en)

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US16506871A 1971-07-22 1971-07-22

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US (1) US3727551A (enrdf_load_stackoverflow)
CA (1) CA973429A (enrdf_load_stackoverflow)
CH (1) CH560102A5 (enrdf_load_stackoverflow)
DE (1) DE2235119A1 (enrdf_load_stackoverflow)
FR (1) FR2146887A5 (enrdf_load_stackoverflow)
GB (1) GB1348469A (enrdf_load_stackoverflow)
IT (1) IT960951B (enrdf_load_stackoverflow)
SE (1) SE382178B (enrdf_load_stackoverflow)

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3874292A (en) * 1973-09-17 1975-04-01 Dahlgren Mfg Co Plate clamp
US4068586A (en) * 1975-10-08 1978-01-17 Albert Frankenthal Ag Cylinder for clamping printing plates
US4191106A (en) * 1975-12-01 1980-03-04 K and Manufacturing Company, Inc. Printing plate clamping assembly
EP0057530A1 (en) * 1981-01-23 1982-08-11 Auto-Masters Limited Apparatus for securing a flexible printing plate to a printing cylinder
US4347788A (en) * 1980-05-01 1982-09-07 Harris Corporation Plate lockup mechanism
US4480547A (en) * 1979-07-12 1984-11-06 Heidelberger Druckmaschinen Aktiengesellschaft Ink duct for offset or letterpress printing machines
US4495865A (en) * 1983-03-15 1985-01-29 Komori Printing Machinery Co., Ltd. Plate clamping device of web-fed rotary printing press
US4691632A (en) * 1986-07-08 1987-09-08 Demoore Howard W Method and apparatus for attaching anti-smear net to printing press transfer cylinder
US4702166A (en) * 1986-08-28 1987-10-27 Rockwell International Corporation Plate lock-up mechanism for printing presses
US4862801A (en) * 1987-03-10 1989-09-05 Harris-Marinoni S.A. Device for holding a printing plate onto a plate cylinder in a rotary offset printing press
US4890555A (en) * 1987-06-03 1990-01-02 Motter Printing Press Co. Printing press plate lockup
US5123353A (en) * 1991-07-03 1992-06-23 Rockwell International Corporation Plate lock-up apparatus
US5131327A (en) * 1989-09-21 1992-07-21 Komori Corporation Plate winding apparatus
US5284093A (en) * 1993-02-24 1994-02-08 Heidelberg Harris Inc. Plate cylinder with semi-automatic plate lock up
US5413042A (en) * 1994-02-22 1995-05-09 Heidelberg Druckmaschinen Ag Lock-up assembly for securing a printing plate on a plate cylinder
US5423258A (en) * 1992-10-12 1995-06-13 Heidelberger Druckmaschinen Ag Clamping device for fastening a flexible printing form on a jacket surface of a cylinder
US5555807A (en) * 1993-08-20 1996-09-17 Heidelberger Druckmaschinen Ag Device for providing a temporary fluidic coupling
US5596928A (en) * 1993-08-20 1997-01-28 Heidelberg Harris S.A. Plate cylinder
US5598780A (en) * 1993-08-20 1997-02-04 Heidelberg Harris, S.A. Plate cylinder
US5644984A (en) * 1995-03-16 1997-07-08 Koenig & Bauer-Albert Aktiengesellschaft Cylinder with plate clamping device
US5738012A (en) * 1994-11-24 1998-04-14 Heidelberger Druckmaschinen Ag Device for fixing a flexible printing form on a form cylinder
US5809890A (en) * 1996-01-19 1998-09-22 Man Roland Druckmaschinen Ag Arrangement for fastening a cover on a printing cylinder
DE19913701A1 (de) * 1999-03-26 2000-09-28 Heidelberger Druckmasch Ag Einrichtung zum Spannen von Druckformen in Spannkanälen reduzierter Größe
US6131513A (en) * 1998-10-23 2000-10-17 Heidelberger Druckmaschinen Ag Printing press with simple lock-up plate cylinder
EP1038672A3 (de) * 1999-03-26 2001-04-11 Heidelberger Druckmaschinen Aktiengesellschaft Einrichtung zum Spannen von Druckplatten in Spannkanälen reduzierter Grösse
US6578484B2 (en) 2001-06-14 2003-06-17 Masthead International, Inc. Printing plate lock-up assemblies having jaw assembly and registration pin assembly
US6601509B2 (en) 2000-12-07 2003-08-05 Heidelberger Druckmaschinen Ag Spring element for fixing in place printing forms on printing form cylinders
US20030154873A1 (en) * 2000-05-17 2003-08-21 Gianpaolo Pezzetta Device for clamping or tensioning
US6675708B2 (en) * 1999-05-29 2004-01-13 Koenig & Bauer Aktiengesellschaft Cylinder having plate securing device including fastening elements for fastening plate legs when cylinder rotates in either direction
US20080216691A1 (en) * 2007-03-05 2008-09-11 Stephens Ronald F Printing plate lock mechanisms
US20090084280A1 (en) * 2007-10-01 2009-04-02 Heidelberger Druckmaschinen Ag Device for Mounting a Printing Plate on a Plate Cylinder of a Printing Press, Printing Unit Having the Device and Printing Press Having the Printing Unit

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Publication number Priority date Publication date Assignee Title
US4527478A (en) * 1983-05-11 1985-07-09 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Means for clamping gravure plates
IL97651A (en) * 1990-04-20 1994-04-12 Minnesota Mining & Mfg Capture and traction system for a photomolich film and method of using it
US5255056A (en) * 1990-04-20 1993-10-19 Minnesota Mining And Manufacturing Co. Photoconductor film clamping and tensioning system and method of use
JP3030582B2 (ja) * 1991-09-19 2000-04-10 株式会社小森コーポレーション 輪転印刷機の刷版交換装置
DE4415683C2 (de) * 1994-05-04 1998-04-09 Roland Man Druckmasch Vorrichtung zum Befestigen einer biegsamen Druckplatte
DE19924786B4 (de) * 1999-05-29 2004-11-04 Koenig & Bauer Ag Vorrichtung zum Befestigen einer biegsamen Platte auf einem Zylinder einer Rotationsdruckmaschine
DE10133876C1 (de) * 2001-07-12 2002-11-14 Koenig & Bauer Ag Verfahren und Vorrichtung zur Bearbeitung eines Zylinders einer Druckmaschine
DE10255707B4 (de) * 2002-11-29 2009-11-26 Koenig & Bauer Aktiengesellschaft Rotationskörper einer Druckmaschine mit mindestens einem Hohlraum

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US965128A (en) * 1908-11-23 1910-07-19 Dyck Gravure Company Van Gripper mechanism.
US1567680A (en) * 1923-12-22 1925-12-29 Cheatham Electric Switching Device Co Ground box with toggle joint
US2276673A (en) * 1939-04-27 1942-03-17 Chicago Telephone Supply Co Switch construction
FR1367860A (fr) * 1963-08-13 1964-07-24 Crabtree & Sons Ltd R Perfectionnement aux machines à imprimer rotatives
US3335663A (en) * 1964-08-12 1967-08-15 Miehle Goss Dexter Inc Plate lockup for reversible plate cylinder
US3410211A (en) * 1964-10-26 1968-11-12 Winkler Fallert & Co Maschf Printing cylinder clamp for tensioning flexible printing plates
US3626848A (en) * 1969-06-09 1971-12-14 American Rockwell Corp Lockup for thin plates

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US965128A (en) * 1908-11-23 1910-07-19 Dyck Gravure Company Van Gripper mechanism.
US1567680A (en) * 1923-12-22 1925-12-29 Cheatham Electric Switching Device Co Ground box with toggle joint
US2276673A (en) * 1939-04-27 1942-03-17 Chicago Telephone Supply Co Switch construction
FR1367860A (fr) * 1963-08-13 1964-07-24 Crabtree & Sons Ltd R Perfectionnement aux machines à imprimer rotatives
US3335663A (en) * 1964-08-12 1967-08-15 Miehle Goss Dexter Inc Plate lockup for reversible plate cylinder
US3410211A (en) * 1964-10-26 1968-11-12 Winkler Fallert & Co Maschf Printing cylinder clamp for tensioning flexible printing plates
US3626848A (en) * 1969-06-09 1971-12-14 American Rockwell Corp Lockup for thin plates

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3874292A (en) * 1973-09-17 1975-04-01 Dahlgren Mfg Co Plate clamp
US4068586A (en) * 1975-10-08 1978-01-17 Albert Frankenthal Ag Cylinder for clamping printing plates
US4191106A (en) * 1975-12-01 1980-03-04 K and Manufacturing Company, Inc. Printing plate clamping assembly
US4480547A (en) * 1979-07-12 1984-11-06 Heidelberger Druckmaschinen Aktiengesellschaft Ink duct for offset or letterpress printing machines
US4347788A (en) * 1980-05-01 1982-09-07 Harris Corporation Plate lockup mechanism
EP0057530A1 (en) * 1981-01-23 1982-08-11 Auto-Masters Limited Apparatus for securing a flexible printing plate to a printing cylinder
EP0057078A3 (en) * 1981-01-23 1982-08-18 Auto-Masters Limited A mechanism for securing a printing plate to a printing cylinder
US4495865A (en) * 1983-03-15 1985-01-29 Komori Printing Machinery Co., Ltd. Plate clamping device of web-fed rotary printing press
US4691632A (en) * 1986-07-08 1987-09-08 Demoore Howard W Method and apparatus for attaching anti-smear net to printing press transfer cylinder
US4702166A (en) * 1986-08-28 1987-10-27 Rockwell International Corporation Plate lock-up mechanism for printing presses
US4862801A (en) * 1987-03-10 1989-09-05 Harris-Marinoni S.A. Device for holding a printing plate onto a plate cylinder in a rotary offset printing press
US4890555A (en) * 1987-06-03 1990-01-02 Motter Printing Press Co. Printing press plate lockup
US5131327A (en) * 1989-09-21 1992-07-21 Komori Corporation Plate winding apparatus
US5123353A (en) * 1991-07-03 1992-06-23 Rockwell International Corporation Plate lock-up apparatus
US5423258A (en) * 1992-10-12 1995-06-13 Heidelberger Druckmaschinen Ag Clamping device for fastening a flexible printing form on a jacket surface of a cylinder
US5284093A (en) * 1993-02-24 1994-02-08 Heidelberg Harris Inc. Plate cylinder with semi-automatic plate lock up
US5596928A (en) * 1993-08-20 1997-01-28 Heidelberg Harris S.A. Plate cylinder
US5555807A (en) * 1993-08-20 1996-09-17 Heidelberger Druckmaschinen Ag Device for providing a temporary fluidic coupling
US5598780A (en) * 1993-08-20 1997-02-04 Heidelberg Harris, S.A. Plate cylinder
US5413042A (en) * 1994-02-22 1995-05-09 Heidelberg Druckmaschinen Ag Lock-up assembly for securing a printing plate on a plate cylinder
US5738012A (en) * 1994-11-24 1998-04-14 Heidelberger Druckmaschinen Ag Device for fixing a flexible printing form on a form cylinder
US5644984A (en) * 1995-03-16 1997-07-08 Koenig & Bauer-Albert Aktiengesellschaft Cylinder with plate clamping device
US5809890A (en) * 1996-01-19 1998-09-22 Man Roland Druckmaschinen Ag Arrangement for fastening a cover on a printing cylinder
US6131513A (en) * 1998-10-23 2000-10-17 Heidelberger Druckmaschinen Ag Printing press with simple lock-up plate cylinder
FR2791300A1 (fr) * 1999-03-26 2000-09-29 Heidelberger Druckmasch Ag Dispositif de fixation de plaques d'impression dans des canaux de fixation de grandeur reduite
DE19913701A1 (de) * 1999-03-26 2000-09-28 Heidelberger Druckmasch Ag Einrichtung zum Spannen von Druckformen in Spannkanälen reduzierter Größe
EP1038672A3 (de) * 1999-03-26 2001-04-11 Heidelberger Druckmaschinen Aktiengesellschaft Einrichtung zum Spannen von Druckplatten in Spannkanälen reduzierter Grösse
US6601508B1 (en) 1999-03-26 2003-08-05 Heidelberger Druckmaschinen Ag Device for clamping printing forms in clamping channels of reduced size
US6675708B2 (en) * 1999-05-29 2004-01-13 Koenig & Bauer Aktiengesellschaft Cylinder having plate securing device including fastening elements for fastening plate legs when cylinder rotates in either direction
US20030154873A1 (en) * 2000-05-17 2003-08-21 Gianpaolo Pezzetta Device for clamping or tensioning
US6694878B2 (en) * 2000-05-17 2004-02-24 Koenig & Bauer Aktiengesellschaft Cylinder having clamping shaft and shaft arresting device
US6601509B2 (en) 2000-12-07 2003-08-05 Heidelberger Druckmaschinen Ag Spring element for fixing in place printing forms on printing form cylinders
US6578484B2 (en) 2001-06-14 2003-06-17 Masthead International, Inc. Printing plate lock-up assemblies having jaw assembly and registration pin assembly
US20080216691A1 (en) * 2007-03-05 2008-09-11 Stephens Ronald F Printing plate lock mechanisms
US20090084280A1 (en) * 2007-10-01 2009-04-02 Heidelberger Druckmaschinen Ag Device for Mounting a Printing Plate on a Plate Cylinder of a Printing Press, Printing Unit Having the Device and Printing Press Having the Printing Unit
US8042468B2 (en) * 2007-10-01 2011-10-25 Heidelberger Druckmaschinen Ag Device for mounting a printing plate on a plate cylinder of a printing press, printing unit having the device and printing press having the printing unit

Also Published As

Publication number Publication date
CH560102A5 (enrdf_load_stackoverflow) 1975-03-27
IT960951B (it) 1973-11-30
FR2146887A5 (enrdf_load_stackoverflow) 1973-03-02
CA973429A (en) 1975-08-26
DE2235119A1 (de) 1973-02-01
GB1348469A (en) 1974-03-20
SE382178B (sv) 1976-01-19

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