Abstract: An offset printing machine having a first printing unit where an ordinary offset printing is achievable and a second printing unit where a number printing and perforating operations can be performed. The second printing unit has an impression cylinder independent of an impression cylinder of the first unit. The second unit is pivotally movable in horizontal plane with respect to the first unit. When the first and second units are connected to each other, offset printing process and subsequent numbering process are achieved. When the second unit is pivotted and is disconnected from the first unit, ordinary offset printing machine can be solely performed. A chain delivery section is provided in the first unit so as to transfer the printed sheet to the second unit. Tension control means is provided for controlling tension of the chain. Further, vertical and horizontal position fixing means are provided for fixing vertical and horizontal position of the second unit relative to the first unit.

Abstract: An improved printing apparatus and method includes plate and blanket cylinders which are rotated at different surface speeds during printing on material. Since the plate and blanket cylinders are rotated at different surface speeds, the area on a blanket cylinder which engages a given portion of the surface on a plate cylinder is changed on each revolution of the blanket cylinder. Therefore, the area of a blanket cylinder which is engaged by the gap in the plate cylinder changes during a printing operation. In addition, the area where an image is applied to the blanket cylinder is moved relative to the surface of the blanket cylinder is tend to minimize build up of ink on the blanket cylinder during printing. The plate and blanket cylinders are driven at different surface speeds by a drive assembly which includes a harmonic drive unit.

Abstract: Application to areas of the successive rollers and cylinders in a printing press, of liquid from the water duct which will not eventually be transferred to the material being printed, is avoided by using a vibrator roller and at least one damper roller of the same width as the sheet of material being printed, while the oscillator roller, the plate cylinder, the blanket cylinder and the impression cylinder are wider than the sheet.

Abstract: An attachment and method for converting a duplicator to a multi-purpose machine capable of printing serial numbers, designs, logos and signatures, as well as scoring and perforating work sheets including a chase adapted to be attached to a blanket cylinder of a duplicator machine for receiving implements for serial numbering, printing signatures, designs and logos, perforating and scoring.

Abstract: A wet laid watermark of uncoated paper is simulated by the use of a resin or resin-plasticizer mixture dissolved in a slow evaporating, high boiling solvent. A sufficient quantity of the low viscosity solution is printed onto an uncoated paper sheet of stationery grade by a standard flexographic press to penetrate the paper fiber and deposit a non-tacky solid having a refractive index which closely approximates that of cellulose. The resulting image of the print is visible to both faces of the paper sheet.

Abstract: An offset printer having a printing section and a plate making section in a unitary assembly. The plate making section is located above the printing section. The printing section includes a plate drum, a rubber drum, and a press drum. The press drum is disposed above and at a predetermined angle relative to the rubber drum. The diameter of the press drum is at least two times as great as the diameter of the rubber drum.

Abstract: A copying and printing apparatus comprises a copying system and a printing system. In the copying and printing apparatus, the copying system produces a copy of a document in an electrophotographic process. On the other hand, in the printing system, an image reader reads an image of the document so as to generate image data according to the read image, a master forming section forms a printing master according to the image data generated by the image reader, and a printing section prints using the printing master formed by the master forming section.

Abstract: An offset printing press having an operating lever mechanism which is capable of controlling sequential printing operations by manipulating a single operating lever. The offset printing press includes an inking roller system and a dampening roller system. The inking roller system is supported to a first pair of frames, while the dampening roller system is supported to a second pair of frames pivotable relative to the first pair of frames. The operation lever provides pivotal motion of the second pair of frames for selectively applying water to a plate cylinder from the dampening roller system. Further, rollers in the dampening roller system are movable toward and away from each other.

Abstract: A mechanical apparatus for modifying an individual sheet feed offset duplicator to print impressions on continuous form pre-punched and perforated paper. A first tractor module is attached to the input of the duplicator for delivering the paper into the duplicator and an indexing mechanism is provided in the first tractor module for providing precise indexing to the paper as it is delivered into the duplicator. A device for adjusting the registration of the impression on the paper is provided in the first tractor module adjustment while the machine is operating. A rear tractor module is also connected at the output of the duplicator and engages the continuous form paper to maintain a predetermined amount of tautness on the paper by providing supplementary pulling on the paper while the paper is pulled through the duplicator.

Abstract: To increase the operating speed of a printing machine in which sheets are fed from a make-ready table (5) to a printing system (P, G; 2, 3, 65, 63), sheets are fed to the make-ready table in a transport direction and a lateral force is applied to the sheets as they are being fed to the make-ready table, for example by inclined belts (6-9).

Abstract: A machine and process for printing sets of documents each having common repetitive impressions such as security backgrounds and general information identifying a banking entity, semi-repetitive impressions such as personalized account and bank branch information, and wherein each document in the set has its own differentiated impressions such as the number of the check and a magnetic reading strip containing machine readable information, comprising a reporter-impression matrix plate which carries the semi-repetitive impressions and which is mounted on a printing cylinder, printing the documents with the semi-repetitive impressions using the reporter-impression matrix plate, providing a further reporter-impression matrix plate which has a printing length divided by the number of differentiated impressions that are needed to print the set of documents, and printing each document with its own differentiated impression which is taken from the further matrix plate.

Abstract: To prevent entirely, or at least largely, loss of contact of a pair of blanket cylinders as they roll off against each other upon passing the respective clamping grooves of the rubber blanket cylinders, the rubber blanket cylinders adjacent the edges of the clamping groove (13,14) are formed with transition zones (15,17; 16,18) which rise above a circle formed by the cylinders, in cross section. The rise (Y) is in accordance with a non-circular mathematical function, and, for a cylinder of, for example, about 20 cm diameter, can be in the order of 0.1 mm. At operating speeds of current rotary offset printing machines, the rubber blankets will hardly lose contact from each other and thus stripping formation, due to oscillations of the blanket cylinders as they roll off against each other, is effectively eliminated.

Abstract: A washing device for washing a rubber blanket cylinder in a rotary offset printing machine, the washing device being convertible to a device for applying lacquer to the rubber blanket, the washing device being disposed at the blanket cylinder upstream of a location of contact between the blanket cylinder and a printing-image carrier, as viewed in direction of rotation of the blanket cylinder, the washing device having a metering roller, a spray device located adjacent to the metering roller, and a washing roller engageable with the metering roller and being disposed in a collecting vessel, including a washing-liquid supply container and a water supply container and valve means for alternatively feeding washing liquid and water from the respective container to the spray device, the metering roller of the washing device, when the washing device is converted to the lacquer applying device, serving as a lacquer metering roller and being engageable with the blanket cylinder in one printing unit of the rotary offse

Abstract: In an offset printing apparatus one arranges in the "channel" of the printing plate cylinder a further segment for improving the emulsion and for reducing the time-interval between "stripping" and "scumming," which is provided with a plane, water-conducting and ink-repellent plate, preferably of polished chromium steel. In the course of the rotation of the printing plate cylinder, this segment, designated preemulsifying segment, is wetted by the dampening form-roller of the dampening unit with water which is emulsified by contact with the subsequently arranged ink form-rollers, before same come in contact with the printing plate of the printing plate segment.As a result of the arranging of the emulsifying segment, the time-interval between "stripping" and "scumming" can be quadrupled and the amount of water required can be reduced.

Abstract: An improved sheet gripper system disposed on the impression cylinder of a printing press having regular sheet grippers mounted on a gripper shaft on the impression cylinder with additional grippers provided in the spaces between the regular grippers, which spaces are intended for cooperating transfer grippers, the additional grippers being adapted to retract into a gripper channel and extend out into the gripper plane only in one zone of the movement of the impression cylinder in which the between-gripper spaces are freed of the cooperating transfer grippers so that the front edge of a sheet is held by both the regular grippers, as it passes through the printing zone, and the additional grippers and the tension to which the printing material is subjected is greatly reduced, and the registry and print quality are improved.

Abstract: A plate pressure and printing pressure adjusting mechanism for permitting separate adjustment of the pressure exerted by a rubber blanket cylinder against a plate cylinder and the same rubber blanket cylinder against an impression cylinder. First and second toggle mechanisms are mounted for reciprocation to opposite sides of the axis of rotation of the rubber blanket cylinder and in similar directions to bring the rubber blanket cylinder into and out of engagement with the plate cylinder and impression cylinder, respectively. A first arm fixedly mounted on the eccentric shaft supporting the rubber blanket cylinder is connected through the first toggle mechanism to a first adjusting arm pivotably supported on the frame, and supports an axial adjusting screw and being spring biased so as to cause the end of the adjusting screw to bear on a first radial cam whose periphery may be shifted.

Abstract: An operation lever controller for a two-color printing apparatus having first and second units adapted to perform printing independently of each other and arranged such that all steps of respective printing operations are performed by rotating respective operation levers in multiple stages. The operation levers, ratchet wheels, set cams for changing and positioning the operation levers in respective multiple stages and arms provided with respective magnets are fixed on corresponding drive shafts of the first and second units. Pairs of feed pallets are respectively provided on unit frames so as to be linked with forward-drive solenoids, backward-drive solenoids, and pallet-drive shafts such that the respective pairs of feed pallets are disengaged and engaged with the ratchet wheels by operations of the solenoids to perform feeding operations using the pallet-drive shafts. Operation lever detecting switches are turned on by the magents at respective positions of the operation levers.

Abstract: A sheet delivery device for a printing machine wherein a sheet is peeled from an impression cylinder and introduced into a nip formed between two conveyor rollers rolling on one another includes a sheet guiding device located downstream of the conveyor rollers in travel direction of a peeled sheet, guide rollers for a trailing region of the peeled sheet, the guide rollers being in operative engagement with the impression cylinder, a carrying element carrying and uniting the conveyor rollers, the sheet guiding device and the guide rollers into a single unit so that they are adjustable in common therewith to a selected format width, and adjusting means carried by the carrying element for adjusting respective forces of application of the conveyor rollers and the guide rollers.

Abstract: A printing unit of an offset rotary printing machine for printing a paper web with an endless impression, the printing unit having two plate cylinders with respective printing plates disposed on half the respective peripheries thereof for providing respective partial prints successively includes at least one blanket cylinder operatively associated with the two plate cylinders, an applicating roller equal in size to that of one of the plate cylinders disposed for simultaneous engagement with both of the plate cylinders, an inking unit and a dampening unit operatively connectible via an inking cylinder with both of the plate cylinders for delivering ink and dampening fluid thereto, a sum of distances starting from a contact location at which successive partial prints provided by the two plate cylinders become united and extending via the at least one blanket cylinder, one of the plate cylinders and the inking cylinder back to the contact location corresponds to a multiple of the periphery of one of the two plat

Abstract: An offset printing press is provided with a novel dual form planetary inker having improved printing characteristics. In use, a plate cylinder rotates to initially contact an ink/water form roller and subsequently contact a second form roller which is devoted exclusively to ink. The ink form roller is operable to insure that voids caused by lint, dust and other debris in the ink train are covered by the second form roller; additionally, the ink form roller provides a second working nip through which a second layer of ink is averaged with the previously deposited ink layer, such that ghosting is substantially eliminated. Both of the form rollers as well as numerous distributor rollers are rotatably carried by a shiftable frame which is pivotally interconnected with a support that carries the plate cylinder.

Abstract: Transfer cylinder for conveying a sheet from one printing unit to another, comprising a cylindrical drum, a row of rubber suction pads for temporarily holding the sheet, the row of suction pads being disposed at an end of a sheet format length on the cylindrical surface of the drum, the rubber suction pads extending in axial direction of the drum, and paper supports disposed in vicinity of the rubber suction pads for respectively applying suction to and supporting the sheet.

Abstract: A printing unit with a short inking unit, the printing unit having mutually engageable impression, blanket and plate cylinders and at least one applicator roller having a size comparable to that of the cylinders for feeding both dampening medium and ink includes an inking cylinder, the inking cylinder and the plate cylinder being disposed relative to one another and to the blanket cylinder in a manner that the blanket cylinder is selectively engageable alternatively with one of the inking cylinders and the plate cylinder, the blanket cylinder being coverable selectively by a blanket and a rubber block, the inking cylinder having a ductor blade engageable therewith, the applicator roller being separated from the inking cylinder in a condition of the printing unit wherein the blanket cylinder is covered by the rubber block and is in direct cooperative engagement with the inking cylinder.

Abstract: Apparatus for printing quasi random number tables used in games of chance comprising a flexographic printing press, such as a Victory Kidder Press, provided with a number of cylinders of different circumferences arrayed about a central drum. Each circumference is a multiple of a basic pitch value and each cylinder is arranged to print columns of numbers or other symbols alongside similar columns printed by the other cylinders in a quasi random array.The tables may be printed on a large number of different materials such as; newspaper preprints, plastic film food wrappers, card, etc.

Abstract: To draw off electrostatic charges which build up on rubber blanket cylinders having a coating of insulating or semiconductive material thereon, the pad or underlay (4) beneath the rubber blanket (5) has an electrically conductive layer (6), for example by sprayed-on aluminum, applied thereon. The end portion (B) of the pad is drawn into the groove (2) of the cylinder (C) in a region which does not have an insulating coating (3) thereon, so that the electrically conductive layer (6) is electrically connected with the cylinder (C) in the region (A) of the cylinder groove. The cylinder, typically of steel, is connected to ground or chassis through its holding structure, frame and gearing.

Abstract: Apparatus for printing quasi number random tables used in games of chance onto newspaper preprints for convenient insertion into and distribution with newspapers. The apparatus comprises a flexographic printing press, such as a Victory Kidder press, provided with a number of cylinders of different circumferences arranged about a central drum. Each circumference is a multiple of a basic pitch value and each cylinder is arranged to print numbers or other symbols to be interspaced between numbers or symbols printed by other cylinders in a quasi random array.

Abstract: An offset printing machine including an operating lever mechanism in which, before the printing process is started, all required preliminary processes can be carried out while the operator can visually confirm them to thereby prevent unsatisfactory printing operations due to erroneous plate insertion. The operating lever is rigidly coupled to an operating shaft upon which are mounted cams and arms for controlling each of a plate loading device, a plate unloading device, a blanket cylinder cleaning device, a form roller control mechanism, a plate cylinder control mechanism, a sheet feed control mechanism, a water duct roller control mechanism and an ink duct roller control mechanism in accordance with the angular position of the operating shaft.

Abstract: To permit, selectively, lithographic printing, flexo printing, or direct lithographic printing on a printing machine with the same direction of rotation of the respective cylinders, a liquid application system (11) including a liquid application roller (15) is selectively positionable for engagement either with a plate cylinder (4, 5) of a lithographic system, the rubber blanket cylinder (2, 3) for direct lithographic printing, the plate cylinder then acting as a form ink transfer cylinder which is being continuously inked; or for engagement with the blanket cylinder, with a flexo printing plate applied to the blanket cylinder, and the plate cylinder being placed out of engagement with the blanket cylinder, the damping liquid for lithographic printing being replaced by flexo-printing ink, and the position (FIG.

Abstract: Drive for producing motion with intervening dwells including a four-bar linkage defining a couple curve travel path traversible only in part and having equally coincident forward and return paths, and a dwell-producing driven rocker arm pair connected thereto, the couple curve travel path having a vertex therein dividing the couple curve travel path into a short curve path for producing a dwell and an elongated curve path extending at an angle to the short curve path for producing a movement, the vertex of the couple curve being identical with an instantaneous pole defining the start and end of the dwell.

Abstract: An automatic printing machine including an automatic plate loading device wherein a water duct mechanism is first activated after which a form roller mechanism is operated to cause form rollers to contact a plate cylinder. After this, the plate loading device forms a plate loading operation in which an original plate is satisfactorily fitted onto the plate cylinder wherein the plate surface is prevented from being contaminated by ink. Satisfactory printing results are obtained as soon as the plate is loaded onto the plate cylinder so that the first printing sheet is satisfactory and there is no waste of printing sheets.

Abstract: Offset, rotary newspaper printing press systems, particularly a method of enhancing inking of the plate cylinder. The method includes defining a plurality of ink repository cells within the surface of an inking cylinder, immersing the repository cells within an ink reservoir, scraping excess ink from the surface of the inking cylinder and rotating the inking cylinder and ink-filled cells against the surfaces of a pair of form rollers, contacting the plate cylinder. Modifications of invention include rotating the watering cylinders against one of the form rollers of the pair or rotating the watering cylinder against a form cylinder which independently controls the plate cylinder.

Abstract: A novel ink formulation, especially useful in Driography printing, is disclosed. The ink formulation comprises a basic planographic printing ink vehicle, a pigment, a modifying varnish and a flow control agent to provide an ink, especially suitable for use in Driography, which exhibits desirable hangling-viscosities under ambient conditions, improved rheological properties under severe press-operating conditions, and provides printings having sharp delineation, fidelity and excellent reproducibility in depth of color tones in long press runs. The basic printing ink vehicle may be a vehicle designed for either sheet-fed or heat-set printing systems. The novel ink formulation is designed to have a high viscosity and avoid becoming pseudoplastic in its behavior at higher press temperatures, which generally can range from about 85.degree. F. to 125.degree. F., and preferably, avoids becoming pseudoplastic at temperatures up to about 140.degree. F. or more.

Abstract: A printing plate holding device for an offset duplicator. The device includes a base slidably positioned on one side of a grooved portion of a plate cylinder of the duplicator. A clamp plate is secured to the base and a clamp lever is attached to the clamp plate. A latch is loosely secured to a pin attached to the clamp lever and connected to a spring to provide a plate clamping force upon the clamp plate. A guide plate and a plate release preventing plate are attached to an outer longitudinal side of the base. An axial displacement control device is positioned at one longitudinal end of the cylinder while a circumferential displacement control device is positioned at the other longitudinal end thereof.

Abstract: A vibration-free cylinder for a printing press in phased rolling engagement with a companion cylinder and which is formed of a cylinder body of star-shaped cross section having a central axial portion and four axial webs extending radially outward therefrom to define between them recesses of sector-shaped cross section. The surface of the cylinder is formed by first and second arcuate shell segments, the first of which extends over substantially half of a revolution and the second over substantially one-quarter revolution, the segments having parallel edges bridging the tip portions of the webs for enclosing all but one of the recesses which is uncovered to produce a gap defining the leading edge of the cylinder surface. The web at the leading edge is extended outwardly to the locus of the cylinder surface so that the cylinder body absorbs the impact with the companion cylinder which occurs at the leading edge at each revolution.

Abstract: A rotary printing press having first and second cylinders in rolling engagement, the first cylinder being rigid and the second cylinder being resiliently covered, both of the cylinders having a longitudinal groove defining a gap in the cylinder surface, the gaps being rotated in opposed synchronism with one another.

Abstract: A method for recording a variant information and a steady information onto a recording medium, wherein the variant information and an identification information for designating the steady information which is to be recorded later are first recorded, and the identification information is then read to select a desired steady information from a plurality of pieces of stored steady information in accordance with the read identification information, and finally, the selected steady information is recorded on the recording medium. An apparatus for effecting the method is also disclosed.

Abstract: Drive for cylinders of an offset printing machine having a gear train constructed of spur gears disposed as drive gears on respective shafts of the cylinders, and including clamping devices for synchronizing rotation of the cylinders, the clamping devices being rotatable with the spur gears respectively associated therewith and having respective gear rims deformable more or less in accordance with an adjustment thereof, including a clamping plate respectively disposed coaxially to the spur gears, the spur gears being helically toothed, and at least two of the clamping devices mounted on the clamping plates, respectively, and acting in radial direction upon the gear rim of the spur gear respectively associated therewith.

Abstract: An offset printing machine comprises a plate cylinder and a blanket cylinder respectively carrying roller tracks rolling on one another and determining the center distance between the two cylinders. At least one inking roller with a supple peripheral layer, fed with ink from an inking assembly, is carried by levers pivoted about the axis of an inking cylinder and it carries roller tracks in contact with those of the plate cylinder. The shaft of the inking roller is mounted in its roller tracks via eccentric hubs locked on the shaft and pivoting in the roller tracks via bearings, and one end of this shaft is fast with a gear coupled to a control shaft for adjusting the pressure contact of the inking roller upon the plate cylinder.

Abstract: A washing assembly for a lithographic press including a washing roller having a porous resilient surface for carrying a charge of cleaning fluid, the washing roller being mounted in a frame for rocking movement from a disengaged position to a first washing position in which the washing roller is engaged with the surface of the blanket cylinder and a second washing position in which the roller is engaged with the surface of the impression cylinder. A drive wheel is provided at the end of the blanket cylinder for coupling to a driven wheel at the end of the washing roller as the frame is rocked to its first washing position for differential driving of the washing roller to produce relative wiping against the surface of the blanket cylinder. A squeeze roller in pressing engagement with the washing roller prepares the surface of the washing roller to accept a fresh charge of cleaning fluid.

Abstract: A lithographic sheet-fed press having an impression cylinder with a gap formed in the surface thereof and having a cooperating blanket cylinder having bearers at its ends. A pair of auxiliary short bearer members bridge the gap in the impression cylinder, presenting arcuate edges for engagement with the bearers on the blanket cylinder, the bearer members are arranged at such radial height that when the blanket cylinder rolls into the region of the gap the force of printing pressure between the cylinders is taken over by the auxiliary bearer members to maintain the transaxial pressure between the cylinders substantially constant throughout the revolution thereby avoiding the cyclical impact accompanying sudden build-up of printing pressure at the end of the gap.

Abstract: A planetary inker for an offset printing press which uses only a single ink form roller but is substantially ghost free. A unique arrangement of distributor rollers operably associated with the form roller are present in sufficient number and of relative diameters with respect to each other and to the form roller to assure complete smoothing out of ink supplied to the form roller in conjunction with total elimination of all plate-derived latent images on the surface of the form roller before recontacting the plate on the plate cylinder. Especially efficient transfer of ink from the supply fountain to a drum roller in rolling contact with the form roller ahead of the distributor rollers is obtained in a preferred embodiment by the use of a pair of ink transfer ductors which are alternately intermittently shifted into engagement with the fountain ink ball and then the form roller vibrator. The relative time of engagement of the ductors with the ball and the vibrator may be selectively varied by the operator.

Abstract: A copying and printing apparatus comprising an integral combination of an electronic copying device and a printing device in which, in the print mode, the image of an original is copied on a master sheet in the electronic copying device to be used as a printing master for producing the desired number of prints in the printing device, while in the copy mode, the image of an original is copied on copying sheets to produce the desired number of copies in the electronic copying device. A sheet delivery changeover mechanism is provided between the electronic copying device and the printing device to be selectively placed in the print position and copy position depending on the print mode or copy mode.

Abstract: An automatic plate supplying device for supplying plates to an offset printing machine is disclosed, which operates to sequentially supply original plates to an original plate conveying device adapted to feed original plates to a plate cylinder provided in the printing machine. A pivotable suction means removes plates from the bottom of a stack for delivery to the machine.

Abstract: A method of automatically controlling deviations in the liquid ink and dampening liquid feed in an offset printing press includes irradiating a layer formed of liquid ink and ingredients of a dampening liquid deposited on a plate cylinder of the press with at least one source of radiation, selectively interposing, in the radiation path between the radiation source and the irradiated liquid layer, wave length absorption filters, selecting certain wavelengths most heavily absorbed by at least one of the liquids, comparing measured values for the ink layer and the individual ingredients of the dampening liquid with a given nominal value and, in accordance with a quantitative deviation between the measured and the nominal values, automatically actuating a control circuit for regulating the feed of the liquid ink and the dampening liquid; and a device for carrying out the foregoing method.

Abstract: A duplicating arrangement which includes a copying machine for copying an original and an offset printing machine operatively connected to the copying machine for producing prints from a master copy. The copying machine and the offset printing machine are both constructed so as to be independently functional modules with an automatic control device being provided for controlling the operation of the copying machine and offset printing machines such that, depending upon the duplications to be made, the duplicating arrangement feeds a copy from the copying machine to either a depository or the offset printing machine, wherein the copy so-forwarded serves as a master copy in the offset printing machine.

Abstract: A mechanism actuates a sheet feed means after a predetermined length of time after a control lever is moved to a print position, thereby allowing sufficient ink to be transferred to a transfer roller such that the first sheet printed has the same density as subsequent sheets. The mechanism comprises a ratchet and a pawl, the pawl being reciprocatingly driven in synchronism with the transfer roller and advancing the ratchet from a reset position to a position in which it engages with a sheet feed control linkage to activate the sheet feed means in a predetermined number of reciprocations corresponding to the predetermined length of time.

Abstract: There is disclosed an improvement in a system for sensing information encoded on a duplicating original, using the information to control copy processing. A duplicating original is installed onto the surface of a cylinder revolving in the duplication process. The encoded information, in the form of indicia printed on the original, is sensed by an optical read head arranged to scan the revolving cylinder. Signals indicating the position of the revolving cylinder are used to determine when to scan for information. Finally, the information sensed, e.g., the copy quantity, is used to control the processes of the duplicating machine. The manner in which the encoded information is arranged conforms to the writing capabilities of a computer output printer, which is preferably also used to prepare the body of text material being duplicated, and the read head is arranged to sense the thus applied indicia and reproduce the information accurately, allowing wide latitude for correct placement of the information.

Abstract: In a washing device for an offset printing press having a blanket cylinder, the washing device being adjustable with respect to the blanket cylinder and including a rotary washing roller having a soft covering and being in frictional driving engagement with and traversible relative to the blanket cylinder, means for wetting the washing roller with wash solution, a collecting vessel underlying the washing roller, a doctor roller having a firm surface located in continuous frictional engagement with the washing roller, a doctor blade abutting the firm surface of the doctor roller for guiding therefrom into the collecting vessel ink washed off the blanket cylinder with the wash solution, and a distributor roller having a firm surface engaging the soft covering of the washing roller at a location behind the doctor roller in the rotary direction of the washing roller, the distributor roller being wettable with fresh wash solution; the means for wetting the washing roller with wash solution including a drip tube mo

Abstract: In an offset lithographic printing machine a recess is provided in the offset blanket in a position such that when the recess is at the nip between the blanket cylinder and the printing plate cylinder the recess is in registry with a part of the non-printing area of the printing plate. The amount of water on that part of the non-printing area is then determined as, for example, a function of the amount of radiation reflected by that part.

Abstract: A mechanism which has a first cam plate pivotally mounted on an operating shaft having an operating lever joined thereto and a second cam plate pivotally mounted on an eccentric shaft of a master cylinder and moved with an arm fixed to the operating shaft. The first cam plate is formed with a pump switch cam, a set cam for operating the operating lever stepwise and a paper feed control cam. The second cam plate is formed with a form roller-separating cam and a master cylinder-separating cam. The form roller-separating cam causes press contact between a form roller and the master cylinder when the operating lever is set at the I position. When the operating lever is set at II, the master cylinder-separating cam forces the master cylinder to maintain its contact with a blanket cylinder, and when the operating lever is set at IV, the paper feed control cam allows a suction foot to move down to start paper feed through an auxiliary operating lever.