US3742244A - Control means for printing apparatus, in particular for offset printing machines - Google Patents

Control means for printing apparatus, in particular for offset printing machines Download PDF

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Publication number
US3742244A
US3742244A US00176930A US3742244DA US3742244A US 3742244 A US3742244 A US 3742244A US 00176930 A US00176930 A US 00176930A US 3742244D A US3742244D A US 3742244DA US 3742244 A US3742244 A US 3742244A
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United States
Prior art keywords
pawl
ratchet
ratchet wheel
teeth
wheel
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Expired - Lifetime
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US00176930A
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English (en)
Inventor
H Raible
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Bauerle Mathias GmbH
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Bauerle Mathias GmbH
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Priority claimed from DE19702010434 external-priority patent/DE2010434C/de
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    • 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
    • B41L39/00—Indicating, counting, warning, control, or safety devices
    • 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
    • Y10T74/15—Intermittent grip type mechanical movement
    • Y10T74/1526—Oscillation or reciprocation to intermittent unidirectional motion
    • Y10T74/1553—Lever actuator
    • Y10T74/1555—Rotary driven element

Definitions

  • a control shaft for an offset printing machine provided with cams, levers and the like for controlling the various operations during a printing cycle, is provided with a knob for manual rotation and with a ratchet wheel for step-by-step rotation by a pawl oscillated cyclically by a cam rotatable with one of the cylinders of the printing machine.
  • the ratchet wheel has a number of switching ratchet teeth corresponding to the number of switching stages of the printing machine.
  • ratchet teeth have a sawtooth shape whereby, when engaged by the pawl, the ratchet wheel is advanced by one step;
  • Other teeth of the ratchet wheel have a special shape including a protuberance on the flank leading to the radial portion of the tooth normally engaged by the pawl. These protuberances cause the pawl to travel out of its normal path of movement when engaged with one of these special form teeth.
  • a spring biased locking disc is arranged adjacent the pawl and is axially displaceable by energization of an electromagnet. The locking disc is biased to engage beneath the ratchet pawl, when the pawl is displaced out of its normal path of movement due to engagement with a tooth of special shape, and
  • the locking disc thereby prevents engagement of the pawl with the next succeeding tooth of the ratchet wheel even though the pawl continues to be oscillated.
  • the electromagnet When the electromagnet is energized, the locking disc is axially displaced from its pawl blocking position, against the bias of a spring, allowing the pawl to again cooperate in a normal manner with the teeth of the ratchet wheel.
  • a control motor for actuating the respective switching devices, which motor, after it has been started manually, drives several trip cams effecting the switching operations.
  • the positions of the individual active flanks of these trip cams are adjusted to each other corresponding to a predetermined switching order.
  • the purpose of this arrangement is to. make the switching time for the sequential startingand stopping movements independent of the manual switching.
  • the control motor is started through a holding relay and a program card, which is conformed to its program markings and to the respective selected printing program, moves ahead always one step forward.
  • the program card is advanced by means of a ratchet mechanism which receives its impulses from the impulse transmitter actuated during the revolutions of the impression roll.
  • the main disadvantage of this known control device is that it increases substantially the cost of the printing machine due to the necessary accessories and loss of time.
  • the program card provided for the control results in a cumbersome operation and a special control motor must be provided for carrying out the control itself.
  • the forward switching of the program card is effected by means of a ratchet mechanism and of a corresponding impulse transmitter in accordance with the rhythm of the machine cycles, these accessories do not ensure the start and stop of individual machine operations in synchronism with respective machine cycles.
  • control shaft is adjustable between a starting position, at least one intermediate operating position and a last operating position, time delay relays being provided which can be adjusted to different running times, by means of which the stepping mechanism which effects the stepping of the control shaft from one position to the other, can be controlled corresponding to the desired operating time of the units actuated by the control shaft.
  • the purpose of this known control device is to effectuate a variation in starting and stopping time and in the duration of the operations within certain limits by means of a single control shaft which controls the operation or, if desired, by hand.
  • this control device too, is very expensive, complicated to operate and is highly susceptible to trouble, disturbances andinterruptions.
  • the object of the present invention is to provide simple and inexpensive means, easy and reliable to operate which result in a highly economical control system which permits to regulate the switching sequence of the machine control shaft both in dependence on the control elements inherent in the machine and persuant to a preset printing program, and to switch individual and- /or several sections of the switching program by manual operation of an electric switching system by means of a ratchet mechanism, so that the end of each individual section of the switching program or system will be always predetermined.
  • the invention is primarily characterized in that the ratchet mechanism possesses, for cooperation with any stepwise switching of the control shaft certain means, e.g., a ratchet wheel mechanism with a number of preshaped ratchet teeth the conformation of which corresponds to the individual switching stages.
  • a locking member which can be disengaged from the respective form of the ratchet teeth after their respective performance, is actuatable by a control magnet (electromagnet) according to the machine cycles via an oscillatable feed pawl or control lever. Consequently the particular control means are accommodated in and form parts of the ratchet mechanism itself, so that there is positively achieved a synchronism between the machine cycles and the switching functions of the control shaft.
  • additional program control elements which could influence the cost of the machine can be completely eliminated. The surveillance and operation of the printing machine will be greatly simplified.
  • the special advantage derived from the solution of this problem is that the switching program of the control shaft is not tied up, as in known machines, with additional separate control devices, but includes a ratchet mechanism which ensures, on one hand a positive synchronism between the machine cycles and the switching operations of the control shaft, and eliminates, on the other hand, additional program control elements which otherwise complicate the operation of and contribute to the increase of the cost of themachine.
  • the operation is also substantially simplified, individual program sections being switched at any time corresponding to given requirements without substantially changing the total program of the machine.
  • an electromagnet or like element actuates the locking element of the pawl, several independent control circuits with electric switches being provided therefor, of which one circuit is controlled by hand, another circuit by a sheet counter, and still a further circuit by the rising table of the machine. Additionally still another circuit becomes effective by a revolution counter of the washing device of the machine.
  • the specially formed ratchet teeth of the ratchet wheel are shaped and specifically provided on the reverse side of the teeth with protuberances and the like, while other ratchet teeth are saw-shaped, the cooperable pawl having a locking part laterally overlying its ratchet teeth which cooperate with the locking element.
  • the present invention makes use of and contemplates specially-shaped ratchet teeth to represent the program control elements proper.
  • the ratchet wheel or like element comprises the switching program.
  • the program control proper is effected in this manner strictly by mechanical means and is therefore very reliable and not susceptible to ineffectiveness or disturbances.
  • FIG. 1 is a side elevation view of essential parts of a control device embodying the'invention as applied to an offset printing machine in which the control shaft is turned by hand for starting individual machine operations and in which the individual operations are stopped by means of a ratchet mechanism;
  • FIG. 2 shows in perspective the control shaft and the essential parts of said ratchet mechanism
  • FIG. 3 is a side elevation view of some of the individual parts of the ratchet mechanism
  • FIG. 3a depicts the ratchet wheel of the ratchet mechanism as seen in side view
  • FIG. 4 illustrates the arrangement of the parts of FIG. 3 in front elevation view, partly in section;
  • FIG. 5 is a side elevation view of the arrangement of individual parts of the counter mechanism employable with the washing device
  • FIG. 6 is a side elevation view of the adjusting means for the revolution counter mechanism
  • FIG. 7 is a side elevation view of the control elements of the counter.
  • FIG. 8 is a circuit diagram of the various control circuits for operating the control magnet.
  • a reset ratchet mechanism of the control shaft ll of an offset printing machine On control shaft 1 there are arranged individual cams 1 to 8, which effectuate the starting and stopping of various operations in a predetermined order.
  • Cam 2 actuates the main switch of the machine motor
  • cam 3 controls the paper feed
  • cam 4 checks the application and removal, respectively, of the sheet or foil cylinder to and from the rubber cloth cylinder
  • control lever 5 controls the etching device and earns 6 and 7 operate the inking-and washing device, e.g. the inking roller.
  • Double cam device 8 becomes operative only during the reward or reverse movement of control shaft 1 and sets the washing device in motion in stage II in which all other operations of the machine have already been stopped or deenergized (FIG.
  • Double cam device 8 which consists of two cams 9 and 10, acts on the angle lever 11 and on its feeler roller 12, which lever 11 is pivotally mounted on a stationary pivot 13 and is under the action of a spring 14 which exerts a torque in clockwise direction on angle lever 11 (FIG. 1).
  • Rigidly connected with cam drive or disk 10 by a bushing assembly 16 is a notched star wheel 17 which is engaged by a stop roller 18 carried by stop lever 19, which in turn is pivotally mounted on a stationary pin20 and which is under the action of a tension spring pulling it radially toward notched roller 17.
  • stop lever 19 On stop lever 19 there is pivotally mounted relative to the latter on a pivot 21 a pawl 22 which cooperates with a locking disk 23 whose function will be described further below.
  • a tension spring 26 always pulls pawl 22 in downward direction.
  • Rigidly connected with notched star wheel 17 and thus with control shaft 1 is a ratchet wheel 27 which is shown in FIG. 3a in side view. This ratchet wheel 27 has eight ratchet teeth I VIII, which are associated with or coordinated to the individual switching positions of control shaft 1.
  • Ratchet tooth I corresponds to the position Off, ratchet tooth II to the position motor on, or to the operation washing in rearward operation, ratchet tooth III to the start of the inking mechanism, ratchet IV to the start of the washing device, ratchet tooth V to the start of the etching operation, ratchet tooth VI to the operation for application of rubber cloth cylinder to the impression sheet cylinder and ratchet tooth VIII to the operation of paper infeed.
  • ratchet wheel 27 constitutes or makes up a program according to which the individual machine operations have been developed and take place as will hereinafter be explained.
  • a pawl 29 which is set into an oscillating motion by a cam disk 33 through intermediate levers 30 and 31 (FIG. 1) connected with each other by a link 32.
  • Cam disk 33 is arranged on shaft 34 of the rubber cloth cylinder of the printing machine.
  • Pawl 29 is pivotally mounted on a pivot 35 of lever 30 and is guided in a chordal slot 36 of a bush 38 pivotally mounted in the proximity of ratchet 27 on a pivot 37.
  • a spring rod 39 (FIG. 3) which loosely engages a stirrup 40 secured on pawl 29.
  • the pawl 29 consists of two parts, namely a switching part 41 which has a ratchet tooth 42, and a locking part 43 covering the ratchet tooth 42 laterally and cooperating with the locking disk 23.
  • Disk 23 is mounted for axial movement on the outer end 44 of control shaft 1 and is provided with a bush 45 which has an annular groove 46.
  • the annular groove 46 is engaged by a pin or pivot 47 of a rocker arm 48 whose other end is connected to an armature 49 of a control segment 50.
  • Rocker 48 is mounted on a stationary journal for pivotal movement in a plane parallel to the axial direction of control shaft 1 and is under the action of a tension spring 51 which urges stop disk 23 against the ratchet wheel 27 when the control magnet 50 is not energized.
  • lever 52 Connected to bush 38, which is provided on its circumference the chordal slot 36 for guiding the pawl 29, is a lever 52 which protrudes with its free end into the path of a pin 53 which is arranged in ratchet wheel 27 and also protrudes through an arcuate slot 54 in looking disk 23. Besides this, lever 52 is under the action of a tension spring 55 which urges it toward the axis of control shaft 1 and exerts on it a torque in counterclockwise direction.
  • control magnet 50 takes place according to the diagram of FIG. 8.
  • Several independent circuits in parallel are assigned to control magnet 50.
  • a make contact switch S7 controlled by a sheet counter 56, which is shown only schematically and which is in series with a reset contact switch 58 which is actuated by a retaining pawl 59 of a counting wheel 60 by means of angle lever 11.
  • angle lever 11 is controlled by double cam 8, comprising cams 9 and 10, respectively, on control shaft 1.
  • a hand-operated push button switch 61 and in parallel thereto a rising table switch 62 which is closed briefly when the rising table (not represented) drops, that is, when the paper on the rising table is used up.
  • a third control circuit of control magnet 50 contains the make contact switch 63 which is closed by counting wheel 60 of the revolution counter 64 of the washing device when the required number of washing revolutions has run off.
  • control shaft-1 can thus be effected by the sheet counter 56 or manually by push button switch 61 or by the rising table by means of table switch 62 and additionally by switch 63 actuated by the revolution counter 64.
  • the number of operational stops that must be carried out during the closing of the individual control circuits described above depends, during the actuation of the switches 57, 61 and 62, exclusively on the program incorporated in and directed to the ratchet teeth Ito VIII of ratchet wheel 27. Only by push button switch 61 is it also possible to suppress this program and to return directly into position I from position VIII by continued pressure on push button switch 61.
  • the above mentioned counting wheel 60 of counter 64 is rotatably mounted on a stationary pivot 65 and has a switching pin 66 in whose path is arranged the make contact switch 63.
  • the starting pivot of the counting position of counting wheel 60 can be preadjusted by an adjustable wheel by means of pinion 67 which engages a toothed segment 69 which is pivotally mounted on pivot 68.
  • the toothed segment 69 is in operative connection with a pinion 76 of adjusting wheel 70, by means of a pin 71 which engages an oblong slot 72 of a joint bar 73, which is operatively connected with toothed segment 74 by means of a pin 75.
  • the toothed segment 74 is pivotally mounted on a stationary journal 77 (see FIGS. 5 to 7).
  • the toothed segment 69 is also under the action of a tension spring 78 which exerts a torque in clockwise direction (FIG. 6).
  • Counting wheel 60 is operated by finger 80 of a pawl 79 which is engaged, by means of an oblong slot 81 with a pin 82 reaching into the latter via retaining pawl 59, for displacement in the direction of the oscillatory movement of pawl 79 and which is under the action of return spring 83 (FIG. 5).
  • Pawl 79 with its operable finger 80 is actuated in the operating position as shown in FIG. 5 by an element 84 of pawl 29 in whose path finger 80 arrives when retaining pawl 79 comes into engagement with the teeth of counting wheel 60. This is the case when the feeler roll 12 of key lever 11 drops during the rearward switching of control shaft 1 onto the lateral curve 85 of cam 9 arranged on control shaft 1 and retaining pawl 59 releases the tension of spring 83.
  • the revolution counter 64 for the washing device which is started by means of lever 11, becomes effective only in position II of the control shaft 1, namely, only when this position of control shaft 1 is started in reverse drive direction.
  • double cam 8 which includes the two single cams 9 and 10.
  • the feeler roll 12 of lever l 1 can not follow the dropping curve 85 of cam 9 since the latter is covered by cam 10 which is rotatable relative to cam 9 by Only during the rotation of control shaft 1 in reverse does the feeler roll 12 of lever 11 fall into a notch 88 formed between the two cams 9, 10 and displaces then cam 10 relative to cam 9, while it follows the dropping flank 85 and performs the above described operations.
  • the method of operation of the ratchet mechanism described above is as follows: Assuming that all machine operations are effective and that ratchet wheel 27, arrives in the position of ratchet tooth I as seen in FIG. 3a, upon corresponding manual rotation of handle 15, then locking disk 23 keeps pawl 29 out of engagement with ratchet wheel 27, so that no switching operation takes place with respect to control shaft ll, despite the fact that pawl 29 constantly oscillates in the rhythm of the individual machine cycle.
  • Pawl 29 thus performs only idle strokes in this position of locking disk 23 and does not influence counting wheel 69 (FIGS. 1 and 5-7) of the revolution counter 64.
  • the reverse movement of control shaft l by pawl 29 and ratchet 27 can be determined by three different causes.
  • the rising table switch 62 is briefly closed by the rising table when it has reached a certain level.
  • Control magnet 50 is energized and its armature 49 pulls locking disk 23 over rocker arm 48 away from ratchet wheel 27 into the position of FIG. 2.
  • Pawl 29 is thus released and is brought by the action of spring rod 39 into engagement with ratchet tooth VIII to turn control shaft back by one tooth division of ratchet wheel 27 as indicated by the direction of arrow 89 (FIG. 3).
  • control magnet 50 has in the meantime become deenergized again, because the rising table switch 62 was opened again, locking disk 23 can at first not return into its locking position (FIG.
  • ratchet tooth 42 of pawl 29 slides over the protuberance 28 of ratchet tooth VI and is deflected radially by pawl 29 so far that locking disk 23 is urged again into the locking position represented in FIG. 4 and this keeps pawl 29 out of its engagement position.
  • control shaft I After turning control shaft I back from position VIII into position VI, the action of the ratchet mechanism is thus automatically stopped.
  • position VI of control shaft 1 the paper supply is shut off and the rubber cloth roller is removed from the sheeting roller so that overinking of the rubber cloth roller is prevented, while a new stack of paper sheet is placed on the rising table. Subsequently control shaft 1 can be turned again by hand into position VIII in which the printing is continued.
  • switching tooth V is also provided with protuberance 28, it is possible, if necessary by again operating briefly push button switch 611, to turn control shaft 1 back from position VI into position V in which pawl 29 is then again brought automatically out of engagement.
  • control shaft ll moves directly from position V into position II if push button switch 611 is pressed again briefly, in which it then remains until the revolution counter 64 closes the make contact switch 63 and energizes again control magnet 59 in order to bring again pawl 29 in engagement with ratchet wheel 27 for the last stepping movement from position II into poisition I.
  • control shaft )1 Due to the above described hand-controlled reverse movement of control shaft )1 from position VIII into position V, in which, in addition to the machine motor, the inkingand the washing device, the etching device is also started, it is possible for example, to also check the operation of the etching device.
  • the step-to-step shut-off of the machine by means of the paper sheet counter 56 occurs in a manner that upon reaching a pre-arranged number of the counter 56 the make-contact switch S7 is closed to the extent, until the operation shaft I has arrived at the position IV in which the engagement of the key lever Ill with the bottom of the control cam 9 opens the rest contact switch 58 (FIGS. ll, 5, 7 and 8) and the control magnet is shut off.
  • the revolution counter mechanism 6 3 is then actuated which upon reaching the predetermined number of sheets closes the make-contact switch 63 and the reversal of rotation of the control shaft from position II to the operative position I is effectuated, in which the machine is completely stopped.
  • a control device for printing machines having a control shaft provided with control elements, such as cams, for the individual machine operations, the control shaft being stepwise displaceable by hand or by a ratchet mechanism, controlled by an electromagnet, into different positions to start and stop the individual operations before, during and after printing: the improvement comprising, in combination, said ratchet mechanism including a ratchet wheel secured to said control shaft and having a number or ratchet teeth corresponding to the number of individual steps included in an operating cycle of the printing machine; a pawl mechanically oscillated in the cycle of the printing machine and engageable with said teeth to step said control shaft; each tooth having an operating edge engageable by said pawl to step the ratchet wheel and a back edge extending from its operating edge and over which the pawl moves to engage the operating edge; certain of said teeth having a special configuration of the back edge which, when engaged by said pawl, displaces said pawl out of its normal path of oscillation; a locking element
  • the improvement claimed in claim 1 including a plurality of energizing circuits, including electric switches, independently selectively operable to connect said electromagnet to a source of electric potential; one circuit including a normally opened manually closed switch, a second circuit including a normally open switch closed by a sheet counter included in said printing mechanism, a third circuit including a normally open switch closed by a rising table included in said printing mechanism, and a fourth circuit including a normally open switch closed by a revolution counter included in the stepping mechanism of said printing machine.
  • the improvement claimed in claim 1 in which the special configuration of the back edge of said certain ratchet teeth comprises respective protuberances on the back edges of said certain ratchet teeth; the other ratchet teeth having a sawtooth shape; said pawl including a ratchet tooth engageable with the operating edges of said ratchet teeth on said ratchet wheel, and including a locking part juxtaposed with the ratchet tooth of said pawl and cooperable with said locking element.
  • said locking element is a circular disc; said ratchet wheel being secured to a shaft and said circular disc being mounted on said shaft for axial displacement relative to said locking part of said pawl; and a pivotally mounted rocker arm connecting said circular disc to said electromagnet for axial displacement of said circular disc.
  • the improvement claimed in claim 1 including a spring operatively associated with said pawl and biasing said pawl relative to said ratchet wheel; the operative connection of said spring being reversible relative to said ratchet wheel.
  • said spring is a leaf spring having one end secured to a pivotally mounted lever and its opposite end operatively associated with said pawl; a protuberance on said ratchet wheel engageable with said pivotally mounted lever to swing the same in one direction; and a tension spring connected to said pivotally mounted lever and biasing the same to swing in the opposite direction.
  • the improvement claimed in claim 4 including a blocking pawl pivoted to swing radially relative to the shaft of said ratchet wheel in the range of axial displacement of said circular disc; a pivoted stop lever pivotally mounting said blocking pawl and engaged with a star wheel fixed to rotate with said ratchet wheel; means on said locking lever engageable with play with said blocking pawl; said blocking pawl, responsive to axial displacement of said circular disc due to energization of said electromagnet, dropping behind said circular disc to prevent return of said circular disc to a position operable to move said oscillating pawl out of its normal path of oscillation; said blocking pawl being retracted out of blocking relation with said circular disc responsive to swinging of said locking lever by said star wheel.
  • the improvement claimed in claim 2 including a make-contact switch and a restcontact switch connected in series in one of the energizing circuits of said electromagnet; said make-contact switch being actuated by a counting wheel moving stepwise in the rhythm of the printing machine; said restcontact switch being actuated by a lever controlled by said control shaft.
  • said last-named lever is constituted by a retaining pawl for a counting wheel of a revolution counter of a washing device included in the printing machine.

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  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Transmission Devices (AREA)
US00176930A 1970-03-05 1971-09-01 Control means for printing apparatus, in particular for offset printing machines Expired - Lifetime US3742244A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702010434 DE2010434C (de) 1970-03-05 Steuervorrichtung für eine Druckmaschine, insbesondere Offsetdruckmaschine

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US3742244A true US3742244A (en) 1973-06-26

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US00176930A Expired - Lifetime US3742244A (en) 1970-03-05 1971-09-01 Control means for printing apparatus, in particular for offset printing machines

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US (1) US3742244A (nl)
JP (1) JPS5016201B1 (nl)
GB (1) GB1345914A (nl)
NL (1) NL142621B (nl)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036135A (en) * 1974-09-30 1977-07-19 Mathias Bauerle Gmbh Offset duplicator with master treating means
US4084508A (en) * 1975-08-18 1978-04-18 Ricoh Company, Ltd. Offset printing machine comprising improved control mechanism
US4213388A (en) * 1977-09-21 1980-07-22 Windmoller & Holscher Gearing for driving a plate cylinder of a printing press at a non-uniform speed
US4324180A (en) * 1979-09-22 1982-04-13 Adamovske Strojirny, Narodni Podnik Drive device
US6302018B1 (en) * 1999-07-19 2001-10-16 Ryobi Ltd. Offset printer having power transmission shut off mechanism
US20090059286A1 (en) * 2007-09-04 2009-03-05 Canon Kabushiki Kaisha Printing system, controlling method, printing apparatus, and storage medium

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3303709A (en) * 1964-05-18 1967-02-14 Lion Mfg Corp Step-multiplying ratchet wheel drive
US3579049A (en) * 1969-11-28 1971-05-18 Grayhill Safety control system for actuating electrically controlled mechanical device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3303709A (en) * 1964-05-18 1967-02-14 Lion Mfg Corp Step-multiplying ratchet wheel drive
US3579049A (en) * 1969-11-28 1971-05-18 Grayhill Safety control system for actuating electrically controlled mechanical device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036135A (en) * 1974-09-30 1977-07-19 Mathias Bauerle Gmbh Offset duplicator with master treating means
US4084508A (en) * 1975-08-18 1978-04-18 Ricoh Company, Ltd. Offset printing machine comprising improved control mechanism
US4213388A (en) * 1977-09-21 1980-07-22 Windmoller & Holscher Gearing for driving a plate cylinder of a printing press at a non-uniform speed
US4324180A (en) * 1979-09-22 1982-04-13 Adamovske Strojirny, Narodni Podnik Drive device
US6302018B1 (en) * 1999-07-19 2001-10-16 Ryobi Ltd. Offset printer having power transmission shut off mechanism
US20090059286A1 (en) * 2007-09-04 2009-03-05 Canon Kabushiki Kaisha Printing system, controlling method, printing apparatus, and storage medium
US10402125B2 (en) 2007-09-04 2019-09-03 Canon Kabushiki Kaisha System for check printing
US11340840B2 (en) 2007-09-04 2022-05-24 Canon Kabushiki Kaisha System for check printing

Also Published As

Publication number Publication date
DE2010434A1 (de) 1971-09-23
NL142621B (nl) 1974-07-15
NL7102665A (nl) 1971-09-07
GB1345914A (en) 1974-02-06
JPS5016201B1 (nl) 1975-06-11

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