Abstract: A printing machine for use with paper roll stock is disclosed. The print head consists of an expandable cylindrical ring print head where the printing brushes are integrated in a spiral pattern around the ring print head. Ink wells are located outside of the print head, and electromagnets, located outside of the ring print head, attract or repel the print brushes towards or away from the ink wells or paper. The printing machine is ideally suited for advertising or other elongated print media. Due to the use of standard paper roll stock and speed of the printing, signs can be printed on demand and displayed in a real-time basis. Two printing machines can be configured to print on both sides of the paper at the same time with the same or different images being printed on each side.

Abstract: A marking device (10) comprises a frame (1) (of frame plates (12,14)) to which are fixed first and second motors (16,18). A carriage frame (40) is pivoted in the frame about a screw axis (22). A marking head (30) is mounted on the carriage frame for movement in a direction parallel the screw axis. A drive screw (20) is rotationally mounted in the frame along the screw axis and is driven by the first motor (16). The carriage frame is journalled on said drive screw to permit said pivoting about the screw axis. The marking head is driven by rotation of the screw, the carriage frame being pivoted by the second motor. The carriage frame (20) comprises a bar (32) on which the marking head slides. The bar is disposed parallel the drive screw. The bar has at each end an arm (34,36) pivoted on bearings (35,37) on the drive screw. One arm (36) has an extension (66) fixed to a belt (58) disposed around two idler pulleys (62,64) and a motor pulley (60) driven by the second motor.

Abstract: A compact printer having a typefont belt constituting a typefont wheel maintained under tension on a support, wherein the platen is rendered displaceable in a direction away from the typefont wheel after the completion of the printing operation, and the front end of a hammer provided in the typefont wheel is inclined upwards.

Abstract: There is disclosed an integrated cylindrical formation of plural lines of a printing type belt in such a printing type drum as contains a hammer unit therein, has plural lines of printing type belts installed round the periphery of the cylindrically formed drum body and supplied printing ink to the types by pressing an ink roller against the printing type belts.

Abstract: A printing mechanism has a type drum which rotates in a plane that extends perpendicularly to the feeding direction of a printing paper sheet, and a control assembly for rotating and for shifting the type drum along a printing line. During printing, the type on the type drum is struck against the printing paper sheet while it is translated in the shifting direction.

Abstract: Printing apparatus for printing characters in a line on paper has a print drum arranged horizontally with respect to the paper and is formed having the indexing means and the translational drive means affixed to the frame to greatly decrease the mass of the assembly. An actuator is arranged inside the print drum and a hammer arm extends at a 45.degree. angle up and into the print drum to contact the actuator thereby driving a selected character outward into contact with the paper. The print drum includes rings having T-shaped characters slidably retained therein in a radial fashion. The characters are retained in the ring by means of a unitary elastic band which passes through slots formed in each type carrier.

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