Abstract: For use in a silk screen printing machine including an impression cylinder and a doctor-blade mounted parallel to the surface of the impression cylinder for movement relative thereto; a doctor-blade supported at opposite axial ends respectively by a pair of fluid pressure operated piston and cylinder devices and flow control valves are disposed between a source of pressurized fluid and the devices respectively for raising and lowering the doctor-blade relative to the impression cylinder. A cam mounted for rotation with the impression cylinder coacts with a switch to operate the control valves.Combined with the above are a pair of additional piston and cylinder devices coupled to said doctor-blade support, and associated control valves for controlling the pressure or force applied by the doctor-blade to the surface of the impression roller.

Abstract: A printing head for use in a thermal printer or a discharge type printer has a groove formed in the side thereof, and balls or rollers are resiliently projected therewithin. When mounted on a connector resting on the carriage of the printer, the printing head is positively held at a regular mounting position.

Abstract: A printing office machine in which a movable print head is driven by a device comprising a fixed, mounted lead screw and a cooperating nut member connected to an electric motor. The nut member is rotatably mounted in a carrier frame and comprises an inner tubular member which is journalled on the lead screw. An outer tubular member is journalled on the inner tubular member. An end part of the outer tubular member bears against a flange on the inner tubular member under friction. The two members are turnably interconnected by spring means, and the free ends of the members support rotatable bearings which bear on flanks of grooves cut in the lead screw. Each bearing cooperates with the groove flank which faces the respective end of the tubular member. The drive device has a very great freedom from play, and at the same time the friction prevailing between the nut member and the lead screw is minimized.

Abstract: An impact printer is provided with a print member which comprises a first helical element having a first font of type characters arranged around its periphery; this first helical element is rotatably mounted so as to be linearily movable along an axis adjacent to a print medium. The print member further includes a second helical element having a second font of type characters arranged around its periphery, and this second helical element is rotatably mounted along the same axis in a position interspaced with the first helical element so as to be rotatable and linearily movable along the axis independent of the first helical element. The print member further includes means for rotating the first and second helical elements.

Abstract: A manually operated typing device comprises a pistol-shaped housing which is formed with a hollow space at the rear part for receiving the tape magazine, is formed with another hollow space at the middle part for receiving a typing handle, is formed with an extension from one of the both side walls for supporting a rotary disc and further is formed with a tape guiding groove on the longitudinally extending upper portion, a rotary disc rotatably supported on said extension from the side walls, said rotary disc being formed with a series of substantially square holes along the periphery, a plurality of typing head assemblies displaceably disposed in the respective substantially square holes of said rotary disc, a hammer member adapted to depress the selected typing head assembly, a typing handle arranged rotatable about a pivotal pin which is extended between the both side walls of the housing, said typing handle being pivotally connected to said hammer member at the front end thereof, a ratchet wheel operative

Abstract: Hinge apparatus for connecting first and second associated members which includes a pivot shaft, a bracket for releasably fixing the shaft to the first associated member, and a bracket for mounting the shaft on the second associated member for relative angular motion. The pivot shaft may be biased to at least one angular position by means of a third member fixed to the shaft and a fourth member carried on the second member. The third member may be a crank arm fixed to the shaft and a fourth member may be reciprocally mounted. The hinge apparatus may be part of a screen printing apparatus. The first member may be a frame and the second member may be a support. At least one spacer may be disposed intermediate the support and the frame at a point spaced from the pivot shaft. The support may include a platen dimensioned and configured to accept a generally planar axial extremity of each spacer.

Abstract: A platen roller type printer/plotter is provided having a paper supply which is frictionally driven by the platen. The plate comprises at least three pieces which are mounted on a drive shaft with the centermost of the pieces being keyed to the shaft to rotate therewith while the other pieces of the platen are free to turn about the shaft at the same or different speeds. A paper supply is fed to the platen with a pressure roller in the middle which bears upon the central platen piece and will drive the paper straight if it is started straight. However, if the paper is put into the platen loose and skewed, driving the center platen roller pulls the paper up tight and aligns it automatically. This is due to the differential action of the different pieces of the platen since only the center piece is keyed to the shaft.An input tray which holds the paper is pivoted under the paper. Accordingly, when the paper is presented to the platen at an angle, the tray moves with the paper reducing the angle error.

Abstract: A printhead assembly for a typewriter of the kind that swipes a printhead along a ribbon in producing marks on a receiving medium, is mounted to pivot and includes a ribbon guide that serves to wrap the ribbon around the trailing side (for a forward printing direction) of the printhead. The assembly is positioned to permit the printhead to be rotated to a normal printing position at a printing line. By so arranging the ribbon path that the ribbon directions for arrival and departure of the assembly intersect the pivot axis, essentially zero resultant torque may be applied to the assembly by ribbon tension forces and the printing pressure at the receiving medium is, accordingly, unaffected by ribbon tension variations.

Abstract: A rotary type rubber stamp of the present invention comprises an assembly of an endless rubber stamp belt, a pair of guide pulleys mounted on shafts for rotating stamp belt, the shafts being spaced apart from each other and mounted on the inner side walls of a case, the stamp belt having a plurality of unit stamp portions connected with each other through a relatively thin hinge portion of the stamp belt, each of said unit stamp portions having on its back surface widthwise of the stamp belt a ridge-like projection to be engaged with mating grooves formed respectively on the pulleys, one of which pulleys being substantially square in section and the other being circular in section, and cooperating projections and recesses on the square pulley and inner side walls of the case, respectively, for releasably retaining the stamp in position during use.

Abstract: A printer for a desk computer includes a card case adapted to accommodate a large number of cards. The cards accommodated in the card case are pressed toward an open end of the card case by a biasing means. A movable frame is adapted to move up and down while keeping in slidable engagement with the open end of the card case. When the movable frame comes down with a card held therein, the card is impressed by the counterrotation of an impression cylinder against the inked printing surface on a plate cylinder.

Abstract: The invention relates to an apparatus for feeding and stacking single sheets for a printing office machine. Singel sheets (32) may be selectively called up from a plurality of magazine units (30), which are disposed vertically one after another. The single sheets are guided to the printing cylinder (12) by way of a horizontally disposed feed-in conveyor track (20) traveling below the magazine unit (30). The printed single sheets are stacked in sorted fashion in stacking receptacles (70) by way of a horizontally disposed delivery track (66,68) provided with controllable delivery diverters (72) and traveling below the feed-in conveyor track (20), the stacking receptacles (70) being disposed vertically one after another below the delivery track. The induction channel leading from the feed-in conveyor track (20) to the printing cylinder (12) crosses the ejection channel leading from the printing cylinder (12) to the delivery track (66,68).

Abstract: A type character selecting mechanism for use in a printing head which is equipped with a plurality of juxtaposed endless bands bearing type characters on their outer surfaces. The mechanism includes a plurality of juxtaposed selecting gears engageable with the corresponding endless bands for turning the same. Each of the selecting gears is formed on its inner side with a series of internal teeth. A selecting shaft is axially slidable through coaxial holes of the gears and is rotatable. The selecting shaft has a locking member at its inner end which is engageable with the internal teeth of one of the gears for locking the same in position. The type characters borne on the two outer bands are semi-fixed; the type characters borne on the remaining inner bands are changeable. The selecting gears for turning the outer bands have their internal teeth angularly displaced from internal teeth of the selecting gears for turning the remaining inner bands.

Abstract: A screen drive assembly is described for use with screen printing presses for facilitating the printing of elongated articles. In the printing press of the subject invention, the screen is driven towards and away from the press over the article to be printed by a unique drive which converts the reciprocal motion of the drive carriage between the end supports to a reciprocal motion in a perpendicular direction. The article is mounted for printing with an axis of rotation parallel to the primary support shafts, and may be substantially freely rotated, in response to the passage of the screen over the article during the printing cycle.

Abstract: An assembly for supporting a cylindrical screen used for printing fabrics and the like. The assembly includes a screen supporting ring which may or may not have teeth on the perimeter thereof. A tensioning ring is nested in the screen supporting ring and is in axial alignment therewith. A bearing is carried between the tensioning ring and the screen supporting ring. Circular seals are carried on opposite sides of the bearing for protecting the bearing from contaminants and the like. Tension is imparted on the screen by pressing against the tensioning ring which forces the screen supporting ring outwardly.

Abstract: A printing device is provided for printing bar code or other indicia on record media such as bank checks and similar documents. The bar code indicia consists of a series of symbols which may be "01" or "10", in which "1" is represented by the presence of a bar and "0" is represented by the absence of a bar in a possible bar position on the record media. The printing device includes a platen having two angled printing surfaces, each of which may be in the configuration of a bar, on one end and being rockable between two positions in each of which one of the printing surfaces is parallel to the path of movement of the record media, and the other of said surfaces is not. A hammer driven by a constant-speed cam coacts with the printing surfaces on the platen to print on the record media during each cycle of cam rotation, and suitable controls position the platen by means of a solenoid during each cycle to determine whether a first symbol or a second symbol will be printed.

Abstract: In a ribbon cartridge for retaining and supporting a ribbon in a typewriter, the cartridge comprising spaced apart top and bottom walls and a sidewall joining the top and bottom walls adjacent the periphery thereof to form a chamber. The sidewall of the cartridge is discontinuous at predetermined locations to form at least entrance and exit apertures for the ribbon, and at least a ribbon take up spool is provided in the chamber in communication with the ribbon entrance aperture to take up used ribbon passing through the entrance aperture.

Abstract: An inker wheel comprising a pair of axially mateable plastic molded discs defining a centrally apertured hub and a concentric annular channel mounting a flexible annular inking ring. One disc carries plural concentric rim pairs arranged to define the mounting channel when the discs are assembled. One rim of each pair is narrow to fix the channel width at one dimension to accommodate one width ring, the narrow rim being selectively removed if a second wider ring is to be accommodated. The pair of discs being selectively machinable to remove an outer portion thereof so that an inner pair of rims define the mounting channel for an inking ring of lesser, yet predetermined diameter can be accommodated. Grommet-plunger fasteners are provided to effect a releasable coupling. Thus a pair of molded members are provided for making at least four differently dimensioned inking wheels.

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: An inked and error correction ribbon assembly comprising an inked ribbon cassette adapted to be pivotally mounted in a machine and an error correction ribbon holder having support arms which embrace the inked ribbon cassette and pivotally support the error correction ribbon holder about the pivot of the inked ribbon cassette. The ribbon cassette and the inked ribbon holder each have forwardly extending spaced ribbon guides, with the guides of the error ribbon holder located outwardly of the guides of the inked ribbon cartridge to provide areas in which error correction ribbon spools can be located forwardly of the inked ribbon cassette and between the inked ribbon and error correction ribbon guides. The assembly allows the location of both the error correction and ink ribbon spools in substantially the same horizontal plane and allows movement of the inked ribbon cassette independently of the error ribbon holder.