Abstract: In a method of controlling an ink supply amount for a printing press, values corresponding to image areas of a plurality of zones obtained by dividing a plate surface are read out as initial values. Correction amounts are obtained on the basis of the readout initial values and a current printing speed. The initial values are corrected using the obtained correction amounts to obtain correction values. Opening degrees of a plurality of ink fountain keys for adjusting ink supply amounts of the zones are controlled on the basis of the obtained correction values. An apparatus for controlling an ink supply amount is also disclosed.

Abstract: A process and a device for the filling of depressions on the cylindrical surface of a rotating, cylindrical body, wherein the device includes a chamber with an interior space having all approximately circular cross-section. Fluid is supplied and discharged centric to the cross-section so that a rotating fluid roller forms when the chamber is positioned on the rotating cylindrical body.

Abstract: Improved apparatus for rotary printing of a strip of paper (1) or similar material, comprising a printing roller (2) provided with a cliche (3) brought into contact with a back pressure roller (4) and a screened roller (5) to quickly interrupt and resume the printing of the paper (1), said means comprising a support (20) to which the printing roller (2) is rotatingly connected and which is, in turn, rotatingly connected to a fixed pivot (21) eccentric with respect to the printing roller (2) and around which rotation occurs by means of an actuator (22). Washing means (15) are also provided for the cliche (3) and a mobile support (30) of the ink roller (6) which allows it to be distanced from the screened roller (5) so as to create a space (8) which promotes the formation of a film of ink on the screened roller (5) itself suitable to keep it damp and prevent drying. (FIG.

Abstract: Method of regulating an amount of dampening medium on a printing plate of an offset printing machine, includes determining the amount of dampening medium on the printing plate, adjusting the rotational speed of a dampening ductor and/or the like to a given set value so as to regulate the amount of dampening medium on the printing plate and, for regulation deviations wherein the set value is greater than an actual value, driving a controller with a greater amplification factor than for regulation deviations wherein the set value is smaller than the actual value.

Abstract: Method and apparatus for metering liquid media of different viscosity and preferably for metering liquid media for application to a printing carrier in varnishing units. In order to assure precise metering, exchangeable metering systems are assigned to a forme cylinder. If processing of low-viscosity media is required, a metering roller and an applicator roller of identical external diameter but different surface hardness are used. For the processing of higher-viscosity media, a chamber-type doctor with a screened applicator roller is used.

Abstract: In a printing press having a chamber body, a doctor blade clamping assembly includes a leaf spring having a plurality of leaves assembled together in overlying relation to each other, the leaves being of different lengths; bolts extending through the leaf spring and secured to the chamber body, the bolts engaging the leaf spring to secure the leaf spring to the chamber body in at least partial overlying relation to a doctor blade such that the leaf spring applies a biasing force to the doctor blade to clamp the doctor blade to the chamber body; an inflatable bladder positioned in a recessed area in the chamber body and at least indirectly engaging the leaf spring when the bladder is inflated so as to bias the leaf spring in a direction away from the doctor blade to release the doctor blade from the biasing force of the leaf spring; a conduit connected with the bladder; a spacer positioned in the recessed area between the bladder and the leaf spring; a bladder control connected with the conduit, the bladder co

Abstract: A printing apparatus employs a rotatable cam having an enclosed cam slot for controlling the rocking motion of an inking roll without the need for a cam follower spring. The apparatus also includes an articulated printing member support assembly which executes a complex curvilinear movement under the control of a fixed cam slot without the use of linear bearings. Complementary cam profiles are used on both cam surfaces in order to maintain tangency between the inking roll and printing element during inking. A yieldable connecting link is used to prevent excessive printing pressures from being applied, and a movable filler plate closes off a slot in a front cover of the printing apparatus through which a portion of the movable printing member protrudes.

Abstract: Drive for at least one oscillating roller in an inking unit of a rotary printing press, wherein the drive starts from a printing unit cylinder, and at least one oscillating roller is arranged in the inking unit for performing a lateral oscillating motion, includes a central gear-wheel for driving the oscillating roller, an intermediate gear-wheel in engagement with the central gear-wheel, and a bushing eccentrically arranged with respect to the oscillating roller, the intermediate gear-wheel being mounted on the bushing.

Abstract: A paperboard processing machine is disclosed for printing and otherwise processing sheets of paperboard, such as corrugated container blanks, and in which the sheets are conveyed from one section of the machine to another section by one or more vacuum transfer systems. Each vacuum transfer system comprises an enclosure which is closed by a closure plate for creating a subatmospheric pressure, which pressure forces the sheets into frictional engagement with the reaches of a plurality of conveyor belts whereby the sheets are transported without contact of the opposite side of the sheet not contacted by the conveyor reach.

Abstract: An ink fountain apparatus includes a plurality of ink blade segments which are arranged in a row extending in the axial direction of a ink fountain roller to form an adjustable ink supplying port between the ink blade segments and the peripheral surface of the ink fountain roller, and an adjusting mechanism provided for each of the ink blade segments to adjust the degree of opening of the ink supplying port. The adjusting mechanism includes a spring which forces the ink blade segment to retract away from the ink fountain roller, a press rod which contacts the rear end of the blade segment at its forward end and is provided with a cam follower facing toward the direction of retracting movement of the blade segment, and an end cam member which is rotatable about a rotational axis parallel to the direction of movement of the blade segment and has a cam surface which is in contact with the cam follower.

Abstract: A printing press having a device for uniformly providing a suction force on a plane body on a support, the device comprising a closed suction chamber having a supporting surface, the supporting surface featuring suction ports. A blower, assigned to the suction chamber, produces an underpressure or vacuum pressure in the suction chamber.

Abstract: A printing apparatus employs a rotatable cam having an enclosed cam slot for controlling the rocking motion of an inking roll without the need for a cam follower spring. The apparatus also includes an articulated printing member support assembly which executes a complex curvilinear movement under the control of a fixed cam slot without the use of linear bearings. Complementary cam profiles are used on both cam surfaces in order to maintain tangency between the inking roll and printing element during inking. A yieldable connecting link is used to prevent excessive printing pressures from being applied, and a movable filler plate closes off a slot in a front cover of the printing apparatus through which a portion of the movable printing member protrudes.

Abstract: An inking and printing system which is usable with fast drying inks uses a housing and a plurality of spray nozzles to apply an ink solvent to the surfaces of printing cylinders after a printing line or contact line. The application of the solvent prevents ink remaining on the printing cylinder, after contact with a paper web being printed, from drying.

Abstract: A rotogravure inking system uses an ink trough to apply ink to a printing cylinder that dips into ink in the ink trough. The ink trough has a length less than the length of the printing cylinder. Projecting end portions of the printing cylinder are not supplied with ink from the ink trough. Thus end faces of the printing cylinder will not receive any ink and will not throw off the ink thereby eliminating ink spattering and the associated spatter protection shields.

Abstract: An arrangement for coating continuous material webs is designed in particular as an inking cell doctor blade for an ink transfer, circular cylindrical screen, such as a screened roller or an engraved cylinder of a printing machine. In the cavity of the inking cell is arranged a profiled body with a pressure nose spaced apart from the outer surface of the screen which forms a flow gap that extends in the axial direction in relation to the screen. The pressure nose further has a relief located behind the screen in its direction of rotation, for a sudden cross-sectional enlargement that causes a sudden pressure drop in the part of the cell cavity located behind the pressure nose. When the circular cylindrical screen is rotated, a high pressure builds up in the wedge-shaped, narrowing flow gap between the pressure nose and the outer surface of the screen.

Abstract: An undershot inking unit and associated method are disclosed. The undershot inking unit includes an ink fountain roller that is controlled independently of the printing speed of the printing machine, and in which the rotational contact angle of the distributor roller on the ink fountain roller is varied according to the printing unit speed. The method comprises controlling the rotational speed of the ink fountain roller independently of the printing speed of the printing machine; and varying the rotational contact angle of the intermittent ductor roller on the ink fountain roller according to the printing speed of the printing machine. In a preferred embodiment, the apparatus includes two coaxial cams rotatably adjustable with respect to each other. Each cam includes a predominant circumferential contour and a subordinate circumferential contour.

Abstract: A combination of a finishing unit for a rotary printing press disposed up-line from a delivery, including a form cylinder, a metering roller, and at least one applicator roller, with sheet-guiding cylinders cooperatively engaging with the finishing unit, the finishing unit having side walls of multipartite construction and being formed with swivel joints, includes an adjusting eccentric for swivelling the metering roller into various positions relative to the applicator roller wherein a transfer and an interruption of transfer, respectively, of finishing fluid onto the surface of the metering roller in accordance with defined fluid-conveying principles occurs, and locking elements insertable in components of the side walls for predetermining a mutual spacing of axes of the metering roller and the applicator roller.

Abstract: A device for pivoting flexible printing plates on the plate cylinder of a rotary printing machine comprises clamping rails for mounting and clamping the two plate ends, articulated levers pivot-mounted on the cylinder body and articulatingly connected to the clamping rails so that both clamping rails are adjustable relative to each other such that the printing plate may be cocked on the plate cylinder.

Abstract: A web width adjusting device can adequately adjust the width of paper web which is travelled through at least two printing sections. The travelling web is sandwitched by a pair of contact means including a plurality of contact members which are aligned in parallel to the axis of cylinders for driving the paper web. The contact members of one alignment are alternatively in contact with the web surface with respect to the other alignment.

Abstract: In order to provide good sealing for an ink fountain insert installed in a wedge-shaped ink fountain, the base of the insert is lengthened at its lower end by a resilient strip by which the insert can be arranged on the ink blade, and the side walls of the insert support a resilient wedge in the deflecting area of the strip.