Abstract: The sheet feed print installation of the flexographic type for printing on a semi-rigid material of the corrugated card type comprises:a plate-carrier cylinder having a plate of thickness E.sub.c fixed to the periphery thereof;a backing system, optionally constituted by a backing cylinder;a screened cylinder; anda transfer system having an inlet into which the sheets are inserted one by one.The installation further comprises:a) three or four motors which are mechanically independent, the first rotating the plate-carrier cylinder, the second rotating the screened cylinder, the third rotating the transfer system, and optionally the fourth rotating the backing cylinder; andb) an electronic circuit connected to the second, third, and optionally fourth motors, that receives an input reference signal and that includes means for inputting operating parameters, including at least the thickness E.sub.c of the plates and the print rate.

Abstract: A multicolor lithographic rotary press comprises a plurality of printing sections arranged along a traveling line of paper web, a plurality of register adjusting means, a paper stretching means and a plurality of width adjusting means. Each of the printing sections further includes at least one of divided plate cylinder each divided section of which is independently moved in the axial direction and/or the circumferential direction. The paper stretching means is arranged at the downstream of the printing sections to apply a stretching force to the paper web. The width adjusting means is arranged between two sets of the printing sections to apply an adjusting force to the paper web.

Abstract: A personal computer (PC) and a programmable controller are used to automatically reposition the turn bars and compensation rollers used in a folder for a web printing press. By providing linear transducers for each of the turn bars and compensation rollers disposed at each level of the folder, analog information as to the actual position of each is provided to the programmable controller. The PC provides digital information to the programmable controller as to the desired position and an error signal is computed for controlling the operation of the drive motors so as to reduce the error signal to zero. When setting up the folder to run a new job, the turn bar settings and compensation roller positions are manually accomplished, but upon command, the settings for that job may be stored in the memory of the PC for use the next time that particular job is to be run.

Abstract: Drive for a printing press having a plurality of printing units having plate cylinders, elements for transporting stock, and elements which do not transport stock includes a gear-transmission device for interconnecting the printing units, a plurality of motors, respectively, coupled at various locations to the gear-transmission device, a device for controlling and regulating delivered power connected to the motors, and a device for feeding signals regarding rotational speed in the gear-transmission device to the control and regulating device, the gear-transmission device including a gear-transmission unit for driving all of the stock-transporting cylinders and the plate cylinders; at least one of the motors being connected to the gear-transmission unit; at least one sensor for detecting motion variables in the gear-transmission unit; at least one drive for driving the elements of the printing press which do not transport stock; at least another sensor for detecting motion variables in the drive for driving th

Abstract: A control system (14) for a printing press (12) having a printing cylinder (36a-36d) having an outer surface, a device (90) for determining a reference printing image for the outer surface of the cylinder (36a-36d), and a device (90) for modifying the reference printing image to a subsequent printing image, and a device (90, 45, 46, 48, and 50) for forming the subsequent printing image on the outer surface of the cylinder (36a-36d).

Abstract: The positions of horizontal lines on a layout cylinder of a printing plate mounting and proofing machine are located with automatic compensation for stretch that results from various parameters such as the diameter of a printing cylinder on which the layout will be used, and the thicknesses of the printing plates and printing plate backing. A display of the circumferential displacement of the layout cylinder, as the cylinder is rotated, provides the displacement with the necessary compensation for stretch, rather than the actual cylinder displacement.

Abstract: An off-line web finishing system performs plural functions on a pre-printed and rewound web at a series of pieces of equipment arranged in a line. Tension in the web is set at a variable infeed at a substantially constant value that is sufficient to facilitate handling of the web. A common web-transport system drives all draw rolls in the line in unison, at substantially the same speed, and without slippage between the web and the rolls. A second drive system, preferably one using a second drive shaft, rotates the function cylinders of one or more registration sensitive pieces of equipment in unison. A continuously adjustable variable transmission is operatively connected between the secondary line shaft and a main line shaft for the web transport. A control system adjusts the variable transmission. It includes a central microprocessor, an optical scanner associated with each function cylinder, and an encoder to measure the speed of rotation of the function cylinder.

Abstract: A cylinder phase adjustment controlling apparatus includes a plate cylinder gear, a reference point, a proximity switch, a rotary angle detector, a controller, and a counter. The plate cylinder gear is phase-adjustably fitted on a plate cylinder rotatably axially supported on a frame and coupled to a drive motor. The reference point rotates together with the plate cylinder. The proximity switch is fixed to the frame and detects the reference point. The rotary angle detector outputs a rotation pulse in accordance with rotation of the plate cylinder. The controller automatically controls the phase of the plate cylinder on the basis of an output from the rotary angle detector after the proximity switch detects the reference point.

Abstract: An apparatus for preventing circumferential separation of the meshing teeth (86, 72) of a blanket cylinder gear (84) and a plate cylinder gear (70) includes a first gear (92) having gear teeth (94) in meshing engagement with the gear teeth (86) of the blanket cylinder gear (84). The first gear (92) is rotatable about an axis. A second gear (108) is coaxial with the first gear (92) and is rotatable about the axis relative to the first gear(92). A third gear (136) has gear teeth (134) in meshing engagement with the gear teeth (132) on the second gear (108). A fourth gear (76) is coaxial and rotatable with the plate cylinder gear (72), and has gear teeth (78) in meshing engagement with the gear teeth (134) on the third gear (136). The apparatus further includes spring means (122) for biasing the first and second gears (92, 108) about their common axis in respective directions that are opposite to each other.

Abstract: In a rotary printing machine, a pressure roller is mounted on a slide that is reciprocally and linearly moved along two mutually orthogonal directions in order to change impression cylinders.

Abstract: Sheet-fed rotary offset printing press having a printing unit including a plate cylinder, a rubber-blanket cylinder and an impression cylinder double the size of the plate and the rubber-blanket cylinders, respectively, at least one auxiliary unit selected from an imprinting unit and a finishing unit removably disposed on a tool-carrier shaft extending transversely to a sheet-transport direction and being mounted in a frame of the printing press, and drive elements for connecting the auxiliary unit to a drive for the printing press and for bringing the auxiliary unit into engagement with the sheet as it is being guided on the impression cylinder, comprising another tool-carrier shaft extending transversely to the sheet-transport direction and being mounted in a frame of the printing press, both of the tool-carrier shafts being disposed parallel to one another in the printing unit and offset from one another by a phase angle having a vertex on a central axis of the impression cylinder, and driving elements for

Abstract: A BB-type printing press employing a divided plate cylinder has a novel drive gear train for avoiding rotation in the associated rotating condition and whereby to maintain satisfactory level of sharpness and/or clearness of printed patterns.

Abstract: In a multicolor printing press which has a plurality of printing sections arranged in vertical alignment, the multicolor printing press facilitates adjustment of register position between a plurality of printing sections. The multicolor printing press thus has a first printing section which includes at least one first plate cylinder, and at least one second printing section which includes at least one second plate cylinder. The multicolor printing press is also provided with means for rotatably supporting the first plate cylinder in a fixed register position for providing reference position in adjustment of register position in the second printing section, means for rotatably supporting the second plate cylinder, and adjusting means of register position of said second plate cylinder relative to the reference position defined by the first plate cylinder.

Abstract: In a multicolor printing press which has a plurality of printing sections arranged in vertical alignment, the multicolor printing press facilitates adjustment of register position along the feeding direction of a printing medium. The multicolor printing press comprises a plurality of printing sections arranged in vertical alignment, a plurality of the printing sections each including at least one plate cylinder for transferring printing pattern defined on a printing plate carried thereon to a printing medium on which the printing pattern is to be printed, and means, associated with the plate cylinder, for adjusting rotational phase of the plate cylinder relative to the printing medium for adjustment of register position of the printing pattern on the printing medium.

Abstract: A method for positioning a register mark sensor in a sheet printing machine, wherein a register mark sensor is moved in direction perpendicular to the direction of the movement of the sheet for detecting a register mark arrangement on the sheet, wherein the register mark sensor is moved until it is positioned in a defined scanning position relative to the register mark arrangement, the method of which includes the steps of: placing on the sheet a preliminary register mark, a given known distance A, perpendicular to the direction of the movement of the sheet, from a given register mark line, and after printing at least one sheet, positioning the preliminary mark sensor in relation to the preliminary mark.

Abstract: A web conveyor drive system, for example of the suction box type, employs independent motor drives for each of the plurality of drive rollers in the suction drive. Web tension drive loads are equalized across the drive rollers by controlling the individual motor drive current to a value substantially equal to the average of all the motor drive currents in the conveyor drive.

Abstract: In a rotary printing machine with directly driven cylinders and at least one directly driven folding unit (12), those drives of the cylinders and their drive controllers which can be assigned to a paper web are combined to form printing-station groups (2). The printing-station groups (2a-d) are connected to one another, to the folding unit (12) and to the operating and data-processing unit (1) via a data bus (3). Within the printing-station group (2), the individual drives of the cylinders and their drive controllers are connected via a high-speed bus system. The printing-station groups (2a-d) acquire their position reference directly from the folding unit (12). The master control system (1) is now responsible only for the presetting of desired values and desired-value deviations and the processing of actual values.

Abstract: A device for presetting a cut-off register in a folder of a web-fed printing press, includes a marking device for applying at least one mark in an image-free region between two printed images of a web, a detector for detecting the image-free region on the web, the detector being connected to the marking device for signalling the marking device when the image-free region is detected thereby, the marking device being disposed a defined distance in front of a nip located between cylinders of at least one printing unit, and a device for activating the marking device to apply a mark to the image-free region of the web when a respective output signal of the detector indicates the presence of the image-free region on the web.

Abstract: A color printing apparatus printing for both sides of printing paper comprises a plurality of printing sections which are arranged at a regular interval in a piled configuration. Each one of the printing section includes a pair of blanket cylinders facing each other which can be moved between their contacting positions and their isolating positions. Every blanket cylinder is connected to a plate cylinder which is connected to an inking unit, or an inking unit and a dampening unit. Each of the plate cylinders is further provided with a fine adjusting means for shifting the plate cylinder along its axis with respect to the blanket cylinder. The shifting operation of the fine adjusting means can easily minimize the printing shears caused by moisture without stopping the printing apparatus.

Abstract: A throw-on and throw-off device for a blanket cylinder in the printing unit of an offset press is provided wherein two parallel double-acting fluid pressure cylinders connected to the blanket cylinder via a toggle-like linkage can be individually supplied with compressed air either consecutively or simultaneously so that, in the first case, precise sequential throw-on of the blanket cylinder on the plate cylinder and subsequently on the impression cylinder can be achieved and, in the latter case, there can be a very rapid throw-off of the blanket cylinder from both the impression cylinder and the plate cylinder. Compressed air energization of the two pressure cylinders is triggered by a control unit in accordance with the position of grip edge zones of the blanket, plate and impression cylinders being in registration.

Abstract: A BB-type printing press employing a divided plate cylinder has a novel drive gear train for avoiding rotation in the associated rotating condition and whereby to maintain satisfactory level of sharpness and/or clearness of printed patterns.

Abstract: A circumferential register adjusting assembly utilizes concentric inner and outer bushings which overlie an axle journal of a plate cylinder. Axial movement of the outer bushing is converted into rotational movement of the inner bushing and of the plate cylinder. A centrally pivoted two arm lever is used to accomplish the axial movement of the outer bushing.

Abstract: Screen printing device, comprising an endless printing belt on which a web of material can be fixed temporarily, a printing belt drive device, and a number of rotary stencils driven by stencil drive devices, the printing belt drive device being coupled to the stencil drive devices at a predetermined angle presetting thereof for a synchronous movement thereof. The device also has a signal generation device which can produce a signal forming a measure for a displacement of the printing belt. One or more markings are provided on or in the printing belt and can be detected by detectors securely fixed at predetermined intervals. A comparison device compares the signal coming from the signal generation device, during a displacement of a marking on the printing belt from one detector to a next detector, with a predetermined reference signal, following which a correction device adjusts the angle presetting of one or more stencils on the basis of the comparison result of the comparison device.

Abstract: A device for adjusting the circumferential register at rotary printing machines. At least one pulley engaging in a groove of a grooved cam is fastened to the gearwheel. Via tappets, the grooved cam is guided at the cylinder body so as to be axially displaceable. The groove is obliquely disposed as seen axially, and the grooved cam is axially movable via an adjusting means. A simple adjustment of the circumferential register is permitted, and such adjustment can be effected with great accuracy during machine operation. The drive forces caused by the gearwheel may be transmitted onto the cylinder body largely without play.

Abstract: This invention relates to a printing press including an impression cylinder and a plurality of printing units which include drive gears and plate cylinders which are movable into and out of engagement with the impression cylinder. The press also includes a driven central gear which is coaxial to the impression cylinder and in mesh with all plate cylinder drive gears. The plate cylinders are permitted to have a plate length which is not exactly equal to an integral multiple of the tooth pitch of the plate cylinder gears so that the peripheral length of the plate cylinder is not an integral multiple of the tooth pitch of the central gear. The central gear is operatively connected by a gear train to drive a gear that is secured to the stub shaft of the impression cylinder. The gear train includes a differential gear train which has an input member that is adapted to be driven by an infinitely controllable transmission or by a stepping motor or the like.

Abstract: A device for adjusting the circumferential register of a printing machine includes a gearwheel for driving a cylinder disposed coaxially therewith. Adjusting elements are connected to the gearwheel in angular position thereof for turning the gearwheel, during operation of the printing machine, over a defined angle relative to the cylinder about the common axis thereof. An adjusting device is located outside the gearwheel and is shiftable in axial direction. The adjusting device is coupled to the adjusting elements connected to the gearwheel. The adjusting elements connected to the gearwheel include at least one two-armed angle lever having a swivel axis disposed perpendicularly to the axis of the cylinder at a defined distance therefrom. The angle lever has first and second legs, the first leg being swivellably connected to the cylinder via a connecting rod at a connection location movable in tangential direction relative to the gearwheel. A cam roller is fastened to an end of the second leg.

Abstract: Registration apparatus for controlling the image height and circumferential orientation of a plate cylinder of a can decorating apparatus using hydraulic linear actuators or electric linear actuators to move first adjustors for the circumferential orientation and second adjustors for the image height orientation.

Abstract: An image adjusting device for an offset printing machine includes a drive source, an adjustment gear mounted on a rotary shaft and always engaged with a gear mounted on a blanket cylinder for adjusting a position of an image to be printed, a clutch mechanism for selectively transmitting a rotation of the drive source to the adjustment gear, and an encoder for controlling a rotational amount of the adjustment gear, the encoder being mounted on the rotary shaft. Further the image adjusting device has first and second detectors for detecting the rotational positions of the blanket cylinder and a cylinder gear, respectively, a microcomputer provided with calculating means for calculating standard and present phase differences between the blanket cylinder and the cylinder gear, and an input means for inputting an amount of adjustment on the basis of the present phase difference therebetween. Thus, it is possible to more correctly effect the image adjustment in the offset printing press.

Abstract: An off-line web finishing system performs plural functions on a pre printed and rewound web at a series of pieces of equipment arranged in a line. Tension in the web is set at a variable infeed at a constant value that is sufficient to facilitate handling of the web. A common web-transport system drives all draw rolls in the line in unison, at the same speed, and without slippage between the web and the rolls. In the preferred form, a second drive line rotates in unison the function cylinders of pieces of equipment that are registration sensitive. The second line is driven by a main line shaft of the web transport system via a variable transmission that is adjusted in response to at least one optical scanner that senses misregistrations between the printed pattern on the web and the function cylinders. The registration sensitive function cylinders operate on the web only intermittently.

Abstract: A device for scanning marks printed on workpieces travelling under a light source includes at least two parallel mark scanning channels emitting an electric impulse due to passage of a mark, each channel being sensitive to a particular color. The device incudes, moreover, electronics for selecting a most representative mark impulse among the electric impulses emitted by the channels.

Abstract: To position two relatively rotatable elements, for example folding jaw control elements of a folding jaw cylinder of a rotary printing machine, with respect to each other, and re-position the elements, a positioning drive (7), for example a motor coupled to a gear, which is coupled for rotary transmission to an axially movable shaft or rod element (10, 10'), movable, for example, under fluid, preferably pneumatic pressure. When projected, the coupling element is engageable with a positioning gear (12) on one of the elements (22) and, upon rotation of the element by the positioning drive, can effect re-adjustment of the angular position of the other element, upon engagement with a positioning gear (11) coupled thereto. The arrangement permits remote positioning and indication of relative position by a feedback transducer (13, 113), such as a potentiometer, which can provide position signals suitable for a display (B).

Abstract: An assembly is provided for indexing the position of a plate cylinder. The assembly includes a drive assembly which is coupled to the plate cylinder, an indexing mechanism which is engageable with the drive assembly, and a shaft which supports the indexing mechanism and rotates it about the axis of the shaft. The drive assembly includes a support and a detent plate which is rotatably and slidably mounted to the support. The detent plate includes tapered or frustoconical openings arranged in a circle upon the plate. The indexing mechanism includes a pin having a tapered head which is insertable into the openings. The detent plate may be moved axially away from the indexing mechanism in order to disengage it from the pin. Once disengaged, the drive assembly and plate cylinder may be rotated with respect to the indexing mechanism and blanket cylinder to allow a different image on the surface of the plate cylinder to be transferred to the blanket cylinder.

Abstract: A method of mutually adjusting single-color images on a rotary printing press for printing multicolor images on a continuous paper strip, each single-color image being printed by a respective printing cylinder adjusted in relation to the other printing cylinders by selecting a reference cylinder from among the printing cylinders; disconnecting the printing cylinder for adjustment from a transmission common to all the printing cylinders; and reconnecting the transmission and the printing cylinder for adjustment, upon the reference cylinder, powered by the transmission, eliminating any difference in timing in relation to the printing cylinder for adjustment. FIGS. 1 and 4).

Abstract: A device for monitoring sheet movement near the lay marks of sheet-fed offset printing presses. To ensure that a sheet has sufficient time to settle on the lay marks, the invention automatically selects between two instants at which sheet position is detected based on the state of the press (printing on or printing off). Since, depending on the state of the press, different procedures are performed before printing, selection of different instants of sensing provide a sheet the maximum amount of time possible for settling before detection.

Abstract: A system for controlling the connection and disconnection of a drive to a rotary cylinder of a printing press. The system comprises a position encoder coupled to a first cylinder of the press for generating at different instants in time two pulses when the first cylinder is rotated to increment its peripheral position by a predetermined amount. A validation gate receives the pulses and generates a single position increment pulse in response thereto. A counter, coupled to the validation gate, counts the position increment pulses and generates a revolution pulse every time the first cylinder effects a complete revolution with respect to a fixed reference point. The system also comprises a coupling unit in an operative relationship with the drive and with a second cylinder.

Abstract: An offset lithographic printing unit (10) in a multi-unit printing press (35) includes a first register adjusting mechanism (80) and a second register adjusting mechanism (84). The first register adjusting mechanism (80) changes the surface speed of the plate cylinder (12) relative to the surface speed of the blanket cylinder (14) when the cylinders (12, 14) are being rotated in a printing operation. The second register adjusting mechanism (84) moves the plate cylinder (12) axially relative to the blanket cylinder (14) when the cylinders (12, 14) are being rotated in a printing operation. A controller (300) operates the first and second register adjusting mechanisms (80, 84) simultaneously when the cylinders (12, 14) are being rotated in a printing operation.

Abstract: A color printing apparatus printing for both sides of a web of printing paper comprises a plurality of printing sections which are arranged at a regular interval in a piled configuration. Each one of the printing section includes a pair of blanket cylinders facing each other which can be moved between their contacting positions and their isolating position. Every blanket cylinder is connected to a plate cylinder which is connected to an inking unit, or an inking unit and a dampening unit. Each of the plate cylinders is further provided with a fine adjusting means for shifting the plate cylinder along its axis with respect to the blanket cylinder. The shifting operation of the fine adjusting means can easily minimize the printing shears caused by moisture without stopping the printing apparatus.

Abstract: In a sheet-fed offset press having at least one printing unit in which the blanket cylinder can be thrown on and off the impression cylinder and plate cylinder by a pressure-medium-energized actuating arrangement, the pressure medium energization is triggered by a control unit in accordance with the position of grip edge zones of the cylinders being in registration. In order to ensure that throwing on and throwing off take place when the grip edge zones of the cylinders are positioned immediately opposite one another, the control unit detects the position of the printing unit cylinders relatively to one another by way of an angular position sensor and also detects the actual speed of the press via a speed sensor. The control unit forms speed-dependent throw-on and throw-off actuating times which are advanced in the direction of rotation of the printing unit cylinders so that the reaction time is outside the time slot for grip edge zone registration.

Abstract: An off-line web finishing system performs plural functions on a pre-printed and rewound web at a series of pieces of equipment arranged in a line. Tension in the web is set at a variable infeed at a constant value that is sufficient to facilitate handling of the web. A common web-transport system drives all draw rolls in the line in unison, at the same speed, and without slippage between the web and the rolls. In the preferred form, a second drive line rotates in unison the function cylinders of pieces of equipment that are registration sensitive. The second line is driven by a main line shaft of the web transport system via a variable transmission that is adjusted in response to at least one optical scanner that senses misregistrations between the printed pattern on the web and the function cylinders. The registration sensitive function cylinders operate on the web only intermittently.

Abstract: A plate cylinder of an offset printing press is adjustable. A motor has an output shaft operatively connected with the plate cylinder to, when driven, adjust the position of the plate cylinder. A tachometer provides a speed reference signal indicative of the rotational speed of the plate cylinder. A register mark error sensor provides an adjustment control signal indicating that the plate cylinder should be adjusted. A computer responds to the speed reference signal and the adjustment control signal to control a DC drive. The DC drive drives the motor at a speed which varies with the rotational speed of the plate cylinder. The plate cylinder is thereby moved to a desired position at a rate which is a function of the operating speed of the printing press. The plate cylinder is moved to the desired position at a slow rate when the printing press is operating at a slow speed and at a fast rate when the printing press is operating at a fast speed.

Abstract: The invention concerns a procedure for controlling the quality of printing, wherein measuring marks (11, 12, 13 and 14) are placed on the printing base, such as a paper web, beside and/or among the actual printing are employed. A lighting unit (1) and an electronic camera (2) trained on the paper web (3) and the operation of the camera at least is synchronized with the transport speed in the printing process. With the camera (2) an image is recorded from a measuring area (9) on the paper web (3), which area contains measuring marks (11, 12, 13 and 14). The image is stored in an image memory (5). The image is taken from the image memory (5) to be processed, whereat the measuring marks are identified and located therein and on their basis the printing quality is checked.

Abstract: A method of registration correction by turning a flexible plate about a point on a cylinder of a press, which includes determining data regarding a deviation from registration of a defined register rotation in at least one of a circumferential, side and angular position of the plate from a specimen made from the plate, and issuing adjustment commands initiating adjustment operations in devices provided in the press for respectively turning the plate and for effecting circumferential and side register, the adjustment commands taking into account the determined data, so as to finally correct the register of a pattern produced by the printing plate.

Abstract: This adjustment mechanism (30) is for a printing press (10) providing a train of modules (12) driven by a common lineshaft (20) having a ninety degree (90.degree.) drive for a roll 18. The drive includes a worm (22) mounted to the lineshaft (20) engaging a worm gear (24) carried by the roll (18) such that axial movement of the worm (22) rotates the worm gear (24) and adjusts the register of the roll. The adjustment mechanism (30) includes a threadedly extensible member (50) engageable with one side of the worm (22) to urge the worm (22) in one direction and a compression spring (52) mounted on the other side of the worm (22) to urge the worm (22) in the opposite direction.

Abstract: To provide a clean operator side (I) of a printing machine, the circumferential and lateral register adjustment of a plate cylinder (20) is located on the machine or drive side (II) of the machine and is formed by a special gearing arrangement; a first gear (12) which is rotatable on an axially shiftable stub shaft (19) of the plate cylinder by being positioned on a bearing thereof, is driven from a second gear (9) which may also drive an offset blanket cylinder (18). The first gear is in meshing engagement with a dual gear, having third and fourth gearings (16, 15), the first, second and third gears being spiral or inclined, and the fourth gear (15), which meshes with an axial fixed fifth gear (13) splined to the shaft fo the cylinder (19), is likewise formed with axial teeth.

Abstract: A marker is used for the confirmation of the paper web-threaded paths for rotary presses. The marker includes a marking unit for putting a mark on a paper web and a regulator composed of 1) a timing detector to detect the rotational phase of a printing cylinder and transmit a detected timing signal and 2) a transmitter to transmit an operating signal to the marking unit when it receives a detected timing signal from the timing detector. The regulator control when a mark is put on the paper web by the marking unit so that the mark always has a predetermined phase with respect to the printed images produced during a printing operation. A paper web-threaded path confirming apparatus includes a mark detector to detect a mark put on the paper web by the marking unit and transmit a detected mark signal. A transmitter transmits a rotational phase signal relatively to the rotational phase of a cutter cylinder rotated in a folder unit.

Abstract: Apparatus and method for printing plate cylinder--impression cylinder registration for a multi color flexographic press wherein pin means are provided on the plate cylinder gear and finger means provided on the impression cylinder gear and when the two come in contact upon rotation of the impression cylinder gear, the plate cylinder gear rotates through a small arc during which time the gears are brought into meshing engagements.

Abstract: To provide for circumferential register adjustment of a printing cylinder, for example a plate or forme cylinder (1) of a printing machine, in which the cylinder is eccentrically retained in an eccentric bearing (5, 6, 7) to permit throw-off of the cylinder from an engaged cylinder, such as a blanket cylinder, a circumferential register adjustment positioning shaft (8) is threadedly secured to a counter plate (13), attached to the frame of the machine. The positioning shaft is coupled via an eccentric bushing (18) to the drive gear (3) of the cylinder. The eccentricity of the eccentric bushing, and the eccentricity of the eccentric bearing (5, 6, 7) for the cylinder are the same, and the eccentric bushing and the eccentric bearing are coupled together by a coupling rod (23) and an extension (25, 25) on the eccentric bushing. Bearings permit both relative rotation, eccentric rotation, and axial shift of the drive gear under control of the positioning shaft.

Abstract: In a sheet-fed rotary printing press, a device for tensionally connecting a fixed gearwheel and a gearwheel coaxial with and adjustable in rotational position thereof relative to the fixed gearwheel on a cylinder of a turning device in the printing press, comprising an actuatable clamping element and a clamping body for clamping the fixed gearwheel and the adjustable gearwheel together, the clamping body being braced against one of the gearwheels, and being held with the clamping element on the other of the gearwheels, friction elements carried by the gearwheels so as to be mutually overlappingly interengaging in the manner of a multidrive clutch, the clamping body having an annular bearing by which the clamping body is braced against an outer one of the friction elements in an overlap region of the friction elements.

Abstract: A sheet type printing press is disclosed which includes a transmission assembly that prevents misregistration of plate and blanket cylinders upon their separation. The assembly also permits the press to be advanced or retarded while running to either correct misregistration or to start a new job using the same plate cylinders. A double harmonic drive is used to advance or retard the press. The harmonic drive is mounted to a hub which causes one of the circular splines and flexsplines thereof to be maintained under constant load. Such loading prevents misregistration when the plate cylinder drive gear is disengaged.

Abstract: Apparatus and method particularly suitable for use with the closed loop color to color registration system of a commercial web printing apparatus providing automatic monitoring of user selected press conditions and disturbances and corresponding user defined outputs. The apparatus comprises a processor and other hardware for detecting press conditions and disturbances, for permitting operator selection of press conditions to be monitored and for permitting operator assignment of selected press conditions to a selected output port. Multiple types of outputs can be selected for each assigned port including latched, non-inverted, inverted, pulsed and delayed outputs. The selected press conditions are monitored and the selected output type is generated on the assigned port in response to occurrence of the selected press condition. Temporary and permanent masks may be assigned to any selected condition to inhibit output and a selection of active time windows may also be specified.