Abstract: A mechanism for rotary printing presses to increase the number of ink form-rollers without decreasing the space available for changing the printing plates. An additional advantage of this mechanism is the ease of access to the inner form rollers.

Abstract: The invention relates to a franking machine, comprising at least one print head of an ink-jet printing mechanism for printing flat postal items such as letters or postcards, which can be introduced into said mechanism or which pass through the same. Said franking machine consists of a guiding part (39) which is located around the print head and projects in relation to the nozzle opening plane of said print head and with which a conveying device is associated, said conveying device transporting the postal items between itself and conveying rollers lying opposite and rotating about axes that are located crosswise to the conveying direction. Said conveying device has two drive-connected driving rollers (32, 33) which together with the guiding part (39), form a path of travel. The driving rollers are located in front of and behind the print head in relation to the conveying direction.

Abstract: An inkjet printing apparatus includes a transportation roller unit and discharging roller units to transport printing media. When printing an image on a front end portion of the printing medium, ink is ejected from a partial number of nozzles of a print head on a side near to the transportation roller unit. When the printing medium is transported by both the transportation roller unit and the discharging roller unit, ink is ejected from all the nozzles of the print head. When printing an image on a rear end portion of the printing medium, ink is ejected from a partial number of nozzles of a print head on a side near to the discharging roller unit.

Abstract: A sheet finisher of the present invention is included in an image forming system and folds a stack of sheets sequentially transferred from an image forming apparatus thereto. The sheet finisher includes a fold roller pair for holding the stack of sheets being conveyed via a nip thereof. A reinforce roller reinforces the fold of the folded sheet stack in cooperation with a guide plate. A drive mechanism causes the reinforce roller to move in a direction perpendicular to a direction of sheet conveyance. A shock absorbing member is located at a position where the reinforce roller and guide plate contact each other.

Abstract: In order to manufacture a discharging roller which discharges a recording medium from a recording apparatus, there are a first die formed with a first recess extending in an axial direction of a shaft portion of the discharging roller, and a second die formed with a second recess extending in the axial direction. The first die and the second die are combined such that the first recess and the second recess face to form a continuous cavity. Synthetic resin is injected into the cavity to mold a bore portion of the shaft portion.

Abstract: A tandem color laser printer 1 is provided with a photosensitive drum unit 15, a developing unit 14, and a scanning unit 13 for each color. The developing units 14, each including a main developer unit 25 and a toner hopper 24, and the scanning units 13, which irradiate laser beam, are alternately stacked vertically to overlap with each other in the vertical direction. This arrangement eliminates space required when arranging the developing units 14 and scanning units 13 side by side, thereby reducing the footprint of the color laser printer 1.

Abstract: A cardboard sheet printing apparatus including: a rotating body that freely rotates inside an ink circulation passage through which ink flows, and a rotation-imparting assembly which is magnetically coupled with the rotating body outside the ink circulation passage and imparts rotation to the rotating body. When the rotating body is caused to rotate by the rotation-imparting assembly, the variation in the load current value that occurs upon changes in the viscosity of the ink that contacts the rotating body is detected; and this variation is compared with load current values that correspond to respective changes in the ink viscosity value stored in memory beforehand and is converted into an ink viscosity value and then displayed, so that the viscosity of the ink is adjusted based upon the calculated results.

Abstract: An inking system is comprised of rollers. At least one roller has a barrel with at least two separate sections. One of these casing sections is arranged in a manner which permits it to be changed independently of the other casing section.

Abstract: A drive mechanism is provided for a printing unit. The printing unit has an axially movable forme cylinder and a second cylinder that cooperates with the forme cylinder. The forme cylinder can be driven by a drive motor through a spur tooth gear. The second cylinder is driven by the forme cylinder through a drive connection between the two.

Abstract: The invention relates to a spray damping unit for printing machines, with a spray housing attached to a machine frame which extends parallel to and along the roller to be dampened, and a spray bar carrying spray valves, which is adjustably attached on the spray housing in a direction radial to the roller. The spray bar can be additionally adjusted in its longitudinal direction parallel to the roller.

Abstract: A folding installation of a web-fed rotary printing press includes a first group of at least two folding formers and at least one additional folding former which is offset vertically from the first group. The folding formers of the first group are adjacent and are offset from each other perpendicular to the running direction of partial webs and are arranged in a horizontal plane to at least partially overlap. Planes of symmetry of at least one folding former of the first group and the additional folding former lie essentially in a common line of a partial web running straight through the print machine. Both aligned folding formers are provided with a common group of leading rollers.

Abstract: Keyless inking systems and methods are disclosed which employs a main form roller and a smaller clean-up roller, both in contact with a rotating printing plate. Separate application and subtractive roller systems control the ink film on the form roller. The clean-up roller removes residual ink from non-image areas on the printing plate. The clean-up roller is in ink communication with the main form roller through a vibrating roller. Mechanisms are provided to selectively engage and disengage the various rollers.

Abstract: An arrangement for processing webs in a rotary web-fed printing press includes a turning device that is usable for shifting the web about an uneven multiple of a half web-width of the web. A folding installation is also provided. The web or webs, which are displaced by the uneven multiple of the half-width, run on two adjacent folding formers which are arranged generally perpendicular to the running direction of the web.

Abstract: A paper post-processing apparatus for folding a paper ejected from an image forming apparatus at a paper folding process section, having a pair of folding rollers; a pair of fold/transporting rollers each of which contacts with each of the pair of folding rollers; a driving unit; a folding roller moving unit; and a drive direction switching unit. When transporting a paper without folding the paper, the holding roller moving unit moves the folding rollers to a releasing position, and the drive switching unit switches the folding rollers to the same rotation direction with each other; and when folding the paper, the holding roller moving unit moves the folding rollers to the pressure contact position, and the drive switching unit switches the folding rollers to the reverse rotation direction with each other.

Abstract: A method of reducing consumption of a developer used in an electrophotographic processor that forms a latent electrostatic image on a charged photosensitive object using a laser exposure unit for outputting a laser beam, the method including adjusting a power of the laser beam to match a user-selected density of an output image so as to adjust an electric potential between an image region and a non-image region of the latent electrostatic image, wherein the consumption of the developer is reduced, and an electrophotographic processor performing the method.

Abstract: A conversion curve setting system comprises an initial data storage device, a conversion curve display device, a setting device, a past data storage device and a past data display device. The initial data storage device stores the initial data. The initial data define setting conditions for amounts of supplied ink of an ink supply adjusting apparatus relative to an image area ratio. The conversion curve display device displays a conversion curve on a display device on the basis of the initial data stored by the initial data storage device. The setting device sets the setting conditions for the amounts of supplied ink of the ink supply adjusting apparatus relative to the image area ratio, through operation by an operator. The past data storage device stores past data of the setting conditions for the amounts of supplied ink of the ink supply adjusting apparatus relative to the image area ratio, which setting conditions have been set by the setting device.

Abstract: A delivery apparatus for folding machines having a folding apparatus FA and a delivery apparatus DA, comprising a delivery fly 3 for receiving signatures S1, S2 and S3 folded by the folding apparatus FA, a conveyor C for operating the delivery fly 3 at a predetermined speed ratio and receiving the signatures S1, S2 and S3 from the delivery fly 3, a gear drive 1 having a plurality of gear ratios provided between the folding apparatus FA and the delivery fly 3 for transmitting power to the delivery fly 3, and changeover means 2 capable of selectively changing over the gear ratio of the gear drive 1, so that the operating speed of the delivery fly 3 can be set to a plurality of speed steps with respect to the operating speed of the folding apparatus FA.

Abstract: A method for drying a printing ink (114) on a printing substrate (14) in a printing press (40), one printing ink (114) having one color pigment being used to print on the printing substrate (14) at one position (18) of a path (16) along which the printing substrate is conveyed through the printing press (40), and, at a chronologically later point in time, at one further position (116) of the path (16), the printing substrate (14) being illuminated with light (12) from a laser light source (10) having a wavelength of between 350 nm and 700 nm, the wavelength being resonant to an absorption wavelength of the color pigment of the printing ink (114). A print unit (30) for implementing the method is described which has a laser light source (10) which emits light (12) of a wavelength of between 350 nm and 700 nm.

Abstract: A printing machine includes several sections, each of which has at least one printing unit with at least one web running through the at least one printing unit per section. Two such sections are arranged offset to each other, transverse to the longitudinal direction of the printing machine. Production of a printed product is achieved, at least in part, by using a common folding unit that extends over the total width of the printing machine.

Abstract: In a printing system where ink from an applicator roller is applied to a form roller in rotational contact with a plate cylinder, methods of washing up after printing in which methods the form roller is disengaged from the plate cylinder and a subtractive roller system removes a mixture of residual ink and ink solvent from the form roller and applicator roller. In preferred embodiments, the press drive is stopped during wash-up and the form roller is independently driven.