US3167007A - Throw-in and throw-off control device for multicolor printing presses - Google Patents

Throw-in and throw-off control device for multicolor printing presses Download PDF

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Publication number
US3167007A
US3167007A US292367A US29236763A US3167007A US 3167007 A US3167007 A US 3167007A US 292367 A US292367 A US 292367A US 29236763 A US29236763 A US 29236763A US 3167007 A US3167007 A US 3167007A
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Prior art keywords
throw
printing
rotation
control member
mechanisms
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Expired - Lifetime
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US292367A
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English (en)
Inventor
Klauss Erwin
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MAN AG
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MAN Maschinenfabrik Augsburg Nuernberg AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/04—Tripping devices or stop-motions
    • B41F33/08—Tripping devices or stop-motions for starting or stopping operation of cylinders

Definitions

  • This invention relates to devices for the automatic control of throw-in and throw-off mechanism at the various sequential printing stations of multicolor sheet-fed printing presses and, more particularly, to such control devices which are adapted for automatic operation to control the throw-in and/or throw-oft mechanism in adjustable manner and for a plurality of sequential printing stations greater than the number which can be readily controlled by mechanical or electrical arrangements actuated by or related to each single rotation of the impression cylinder at each printing station.
  • some mechanism may be desired for automatically throwing off or retracting into non-printing position the printing plate mechanism sequentially at each successive printing station after the last sheet has passed each station and/ or when no sheet is present at such station, notwithstanding the continued printing of the mechanism at succeeding printing stations.
  • the converse may be desired (i.e., automatic control for the throwing in of printing mechanism) at each successive station sequentially as the first sheet comes through to avoid printing on the impression cylinder dressing or covering during, for example, the five printing cycles which occur at the last of six printing stations before the first sheet of the run passes the first five stations and reaches the sixth.
  • such throw-in and throw-off mechanisms at each printing station must be operated sequentially and in a manner where both the first and the last sheet being fed is completely printed with all the sequential printing impressions.
  • the operation of such mechanism must proceed sequentially through the press from printing station to printing station with a time delay between each station corresponding to the time of i travel of the sheet being printed from impression cylinder "ice to impression cylinder.
  • the actual throW ofi? mechanism at each impression cylinder or printing station may include a pawl mechanism for retracting or throwing off the printing mechanism, but the actuation and timing of such mechanism and the extent or duration of the throw-in or throw-off period must be sequentially controlled as noted along the line of printing stations.
  • each successive throw-cit mechanism mechanically-ms by a pawl or lever mechanism on the transfer drum between two adjacent printing stations for providing the time delay of one rotation of the transfer drum for actuating the throw-oil mechanism at a subsequent printing station by prior actuation of that at a previous printing station-it may be found that such mechanical time delay at best can provide a delay of only about 60 degrees of rotation of the printing press cylinders-i.e., an insufficient time delay to accommodate more than three printing stations, because the mechanical arrangement for imparting the first time delay after throw-oil from the first printing station must be repeated again for each succeeding printing station to maintain each of them thrown oil for at least the number of printing cycles corresponding to the number of printing stations.
  • control devices are produced for controlling from a single point on the printing press the actuation of throw-in and throwoff mechanisms operating at each of virtually any number of sequential printing stations, with the appropriate time delay from station to station and with the printing mechanism at each successive station being automatically maintained in either thrown-in or thrown-off position for the requisite number of printing cycles and with the sequential throwing in and throwing off at each successive station being automatically actuated and timed to the passage of a sheet through the press without regard to the actual number of revolutions required by the impression cylinders at each station during thrown-in or thrownotf settings; and such advantages as provided herewith are achieved through the use of one or more timing shafts and a plurality of clutched cam mechanisms corresponding to the number of printing stations for the sequential operation of electrical circuits for individually actuating electro-mechanical devices such as solenoids, etc, for actual movement of the conventional throw-in and throw-otf 3 mechanisms at each printing unit, and in a manner which permits the greatest flexibility of adjustment particularly related not only to the total number
  • FIG. 1 is a view, partly in section and with some parts removed for clarity, of the timing and switching mechanism ebodying and for practicing this invention.
  • FIG. 2' is a schematic diagram of a combination of electrical and mechanical and switching arrangements embodying and for practicing this invention
  • a control circuit or arrangement on which are indicated at 1tl13 a plurality of conventional solenoid devices for actuating electrically or mechanically and individually the various conventional throw-in and throw-off mechanisms at each of a plurality of printing stations, whilethe main control lever 15 is shown as being movable from a throw-in to a throw-off position (and being shown in the first) for initiating the sequence of control operations as, for example, at the first printing station.
  • lever 15 Movement of lever 15 to the throw-in position shown actuates (mechanically or electrically), but in known and conventional manner, the actual throw-off pawl mechanism of the first printing station, indicated at 20, while also moving switch 21 into the position shown for energizing the coil of solenoid switch 22 (from main power source indicated at 23) to energize the electromagnet actuating mechanism indicated at 25 and described in more detail below with regard to FIG. 1.
  • clutch mechanism includes a plurality of cams, one for each printing station, and some of which are indicated diagrammatically in FIG. 2 as 3840, each of which operates a microswitch (such as 41-43), the result of which is to actuate individually and selectively and sequentially the various throw-oif actuating solenoids 13, etc.
  • each of the individual throw-in or throw-off mechanisms is achieved in the desired sequence and timing during a single rotation of one or another of the timing clutches 35 or 36 depending upon whether throwing in or throwing off is to be accomplished.
  • individual switches i.e., 45-48
  • a master switch 50 being arranged for interrupting the entire sequence, as will be understood.
  • timing shafts 61 and 62 mounted in the side wall 60 of the printing press, two timing shafts 61 and 62, both geared to a jack shaft 63 as by gears 64, 65, and 66.
  • Jack shaft 63 is driven by a speed reducing sprocket 76 and chain 71 from the main a printing press drive (not shown), but the reduced speed of rotation of jack shaft s3 (and, consequently, timing shafts 61 and 62) is predetermined and adjusted with respect to the number of'printing stations as by selecting or substituting difierently sized sprockets 70 to give reduced predetermined but related speed to timing shafts 61 and 62 whereby but a single full rotation of each shaft occupies the entire period or extent of time during which all the sequential throw-in or throw-off mechanisms for all the printing stations in use will operate for a throw-in or throw-off sequence of operations.
  • the ratio or speed reduction of chain and sprocket drive 76), 71 for jack shaft 63 is selected and adjusted so that a full six rotations occur for each single rotation of timing shafts 61 and 62.
  • two timing shafts a1 and 62 are provided, along with pertinent mechanism to be described, as a preferred arrangement with shaft 61 timing the sequence of throw-in operations and shaft 62 timing the sequence of throw-off operations as making for greater flexibility of operation of the press.
  • Timing shafts 61 and 62 are provided with friction clutch male elements 75 and '76, for engagement, respectively, of female clutch members 35 and 36 upon axial movement of members '75 or 76 along the respective tirning shafts 61 and 62, with compression springs 77 being provided in known manner to urge the male and female clutch parts into disengaged position.
  • all of the mechanism about to be described and shown as appertaining to clutch 36 at the top of the drawing is essentially duplicated with regard to clutch 35 at the bottom, but is omitted for clarity in the drawing and in view of the sectioned showing of the lower clutch mechanism on timing shaft 61.
  • both electromagnetic devices 25 and 30 appear in connection with the mechanism of FIG. 1, although only the male or core portion of electromagnet 30 is shown on the drawing and only the female or coil portion of electromagnet 25 is illustrated, the respective other parts being omitted for clarity.
  • electromagnet devices 25 and 30 both comprise a hollow electrical coil (indicated at 3th for device 25) in which reciprocates a core portion (indicated at 81 for device 39), along with two reciprocating guides (indicated at $2 for electromagnet 30) which slide in stationary guides (indicated at 83, for device 25), with movement of the core portion being in response to energization of the coil.
  • energizing the coil of electromagnetic device 36 causes core 81 to be drawn downwardly into the electroma netic coil (such as 8i illustrated for electromagnet 25).
  • electroma netic coil such as 8i illustrated for electromagnet 25.
  • bell crank 86 Such downward urging of core 81 of electromagnet 30 is translated through link 85 to bell crank 86, pivoted at 87 as on a bracket 83 afiixed to side wall 66 of the printing press.
  • bell crank 86 Also rotatably connected with bell crank 86 (preferably through a resilient torsion spring indicated at 89) is an additional bell crank 90, the top end of which includes a roller 91 engaging a groove 32 around male clutch member 76 for sliding the clutch member axially on shaft 62 into engaging relation with female clutch member 36.
  • the lower end of bell crank 90 includes a lock 33 for interlocking with a corresponding slot in female clutch member 36 to prevent rotation thereof.
  • energizing electromagnet 3i depresses core 81 therein and, through link 85 and bell crank 86, rotates bell crank 90 to the right in FIG. 1, thereby disengaging interlock 93 and sliding male clutch member 76 to the right in the drawing into driving engagement with female clutch member 36 against the action of the compression spring (such as 77) within the clutch mechanism.
  • the compression spring such as 77
  • timing shaft 62 is constantly rotating throughout operation of the printing press and since male clutch member 76 is keyed thereto by a sliding key or spline (such as 94), such engagement of male and female clutch members 76 and 36 instigates the rotation of the latter.
  • a sliding key or spline such as 94
  • an extending stop or abutment 160 positioned so as to engage the righthand end of lever 96 and raise it against the action of spring 37 after one rotation of female clutch member 36 so as to release catch 95 from holding bell crank 86 in the righthand position, and permit compression spring 77 Within the clutch to urge male clutch member 76 back toward the left in the drawing and into disengaged position while, at the same time, interlock 93 on bell crank 96 again engages its depression on female clutch member 36 to maintain it in non-rotating position.
  • the mechanism is shown in the drawing for rotation in a direction in which extending abutment 1% moves first away from the viewer.
  • female clutch member 36 carries for rotation therewith a plurality of cams (indicated as 39 and 40 in FIG. 1) each of which engages a microswitch (indicated as 42 and 43 in FIG. 1) at a different angular position thereof.
  • each cam will operate its respective microswitch with the predetermined sequential time delay required for the respective microswitches each to activate or instigate operation of the throw-in or throwofi mechanism at each successive printing station.
  • timing shaft 62 Since the speed of rotation of timing shaft 62 has been predetermined, as described above, so that but a single rotation of female clutch member 36 covers at least the complete length of time desired to accommodate sequential operation of all throw-in or throw-off mechanisms at each of the printing stations, the desired time delay sequence is readily achieved and quite accurately controlled by the number and angular positioning of the various cams such as 39, 46, etc., around the female clutch member 36 during the single complete rotation achieved by the mechanical interlock of male clutch member 76 into driving engagement until such engagement and interlock is interrupted as by extending abutment 169 contacting and raising lever 96 to permit compression spring 77 to urge the parts back into the disengaged position shown in FIG. 1.
  • FIGS. 1 and 2 The arrangement shown in FIGS. 1 and 2 is necessary for the situation where it is desired to jog but a single sheet all the way through all the printing stations, as in the make-ready of the press or for checking register of the various impressions, etc.
  • timing shafts 61 and 62 are nevertheless appropriately related to the number and speed of rotations of the entire printing apparatus to accommodate the particular time delays desired so that throw-in and throw-off movements will be achieved in proper sequence and with the proper time delay to permit complete passage of a sheet through all printing stations, while yet avoiding any undesired printing or contact of the surface of an empty impression cylinder with the printing plate itself.
  • the mechanical interlock for maintaining the timing clutches in engagement only momentary energization of the controlling electromagnets 25 or 30 is necessary, and electrical interlocks thereof with the various impression cylinders at the various printing stations are neither necessary nor desired.
  • timing shafts 61 and 62 are readily altered, with regard to the number of printing stations on the press or actually in use, merely by changing the sprocket wheel 70, and the provision of separate control cams and microswitches on the female clutch ele- 2 ment or 36 also permits highly accurate and easy control of thedesired time delays in the operation of each printing station actually in use and virtually independently of the number of printing stations, with ready change and adjustability as the number varies.
  • said operating means for instigating rotation of said plurality of cam surfaces includes an electromagnetically controlled clutch, means for momentarily energizing said clutch into driving engagement between said timing shaft and said cam surface upon actuation of one of said throwin or throw-off mechanism at one of said printing stations, and means for mechanically maintaining said clutch in engagement between said timing shaft and said cam surfaces after said momentry actution thereof and throughout said single revolution bringing about said sequential operation of said throw-in or throw-elf mechanisms.
  • said means for rotatably driving said timing shaft includes a speed reduction drive with the reduced speed thereof related to the number of said printing stations in use in said printing press, and being adjustable depending upon how many of said printing stations are in use in said printing press.
  • said speed reduction drive includes a chain-and-sprochet drive in which the sprockets are replaceable for adjustment of said reduced speed depending upon the number of said printing stations in use in said printing press.
  • cam surfaces are adjustable for controlling said timed sequential operation of said device depending upon'the number and location of said printing stations in use in said printing press.
  • Apparatus as recited in claim 2 which also includes a mechanical rotation-preventing interlock for holding said control member against rotation except during engagement of said clutch.
  • said means for selectively operating said clutch means includes an electromagnetic device automaticaly and momentarily actuated upon actuation of said throw-in or throw-oft 10 mechanisms at one of said plurality of printing stations and mechanical means for maintaining said clutch means in engaged position throughout said single rotation bring ing about said full cycle of said sequential operation of said throw-in or throw-off mechanisms and after said momentary actuation of said electromagnetic device.

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  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
US292367A 1962-07-06 1963-07-02 Throw-in and throw-off control device for multicolor printing presses Expired - Lifetime US3167007A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM53467A DE1210899B (de) 1962-07-06 1962-07-06 Einrichtung an Mehrfarben-Bogenrotations-druckmaschinen zum Steuern der Druckan- bzw. -abstellvorrichtungen der einzelnen Druckwerke

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US3167007A true US3167007A (en) 1965-01-26

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US (1) US3167007A (de)
CH (1) CH411937A (de)
DE (1) DE1210899B (de)
GB (1) GB1002772A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3461798A (en) * 1968-06-07 1969-08-19 Harris Intertype Corp Selective and sequential interrupter for a multiple couple printing press
US3863567A (en) * 1973-04-25 1975-02-04 Dennison Mfg Co Multiline offset printing machine
WO1998055312A1 (de) * 1997-06-03 1998-12-10 Koenig & Bauer Aktiengesellschaft Verfahren und einrichtung zum antrieb einer druckmaschine mit einer integrierten bebilderungseinrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419403A (en) * 1941-08-09 1947-04-22 Hoe & Co R Printing machine
US2615393A (en) * 1948-01-27 1952-10-28 Hoe & Co R Sequential tripping mechanism control for multiunit offset presses
US2950674A (en) * 1954-10-01 1960-08-30 Crabtree & Sons Ltd R Trip mechanism for printing machines

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE386938C (de) * 1923-12-18 Vogtlaendische Maschinenfabrik An- und Abstelleinrichtung fuer die an- und abzustellenden Zylinder und Walzen der Druck- und Farbwerke von Rotationsdruckmaschinen
DE427544C (de) * 1924-09-02 1926-04-10 Maschf Augsburg Nuernberg Ag Vorrichtung zum An- und Abstellen der Zylinder und Farbwalzen bei Rotationsdruck-maschinen, insbesondere Rotationsgummidruckmaschinen mit mehreren Druckwerken
DE872791C (de) * 1950-08-23 1953-04-09 Roland Offsetmaschf An- und Abstellen der Zylinder an, aus mehreren Einheiten zusammengestellten Mehrfarbendruckmaschinen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419403A (en) * 1941-08-09 1947-04-22 Hoe & Co R Printing machine
US2615393A (en) * 1948-01-27 1952-10-28 Hoe & Co R Sequential tripping mechanism control for multiunit offset presses
US2950674A (en) * 1954-10-01 1960-08-30 Crabtree & Sons Ltd R Trip mechanism for printing machines

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3461798A (en) * 1968-06-07 1969-08-19 Harris Intertype Corp Selective and sequential interrupter for a multiple couple printing press
US3863567A (en) * 1973-04-25 1975-02-04 Dennison Mfg Co Multiline offset printing machine
WO1998055312A1 (de) * 1997-06-03 1998-12-10 Koenig & Bauer Aktiengesellschaft Verfahren und einrichtung zum antrieb einer druckmaschine mit einer integrierten bebilderungseinrichtung
US6393987B1 (en) 1997-06-03 2002-05-28 Koenig & Bauer Ag Method and device for driving a printing press with an integrated imaging device

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Publication number Publication date
GB1002772A (en) 1965-08-25
CH411937A (de) 1966-04-30
DE1210899B (de) 1966-02-17

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