Abstract: A printer having an underlining function includes an underline position memory. Each bit of the underline position memory is allotted to each printable position, and contents of bits corresponding to the underline positions are inverted.

Abstract: A dot printing device includes a head having a plurality of dot printing elements, a head driver for selectively energizing the dot printing elements according to dot data, a character generator, and data processing unit which causes designated character data to be generated from said character generator according to frist input data including character designation data and underline data and transfers the designated character data together with one-bit dot data representing an underline to the head driver. The data processing unit operates according to second input data including character designation data, underline data and double height data to print an upper half portion of the designated character data in a first printing cycle and transfers dot data representing a lower half of the designated character data and two-bit dot data representing an underline to the head driver in a second printing cycle.

Abstract: Electronic word processing is carried out with a keyboard including character keys and attribute keys. Attribute codes input by the attribute keys are stored in an attribute code memory in accordance with the sequence of attribute key operation. An attribute pattern corresponding to an attribute code read out from the memory is read out from attribute pattern memories, and is printed by a printing section after compounding by an instruction from an attribute compounding designation section.

Abstract: In a printer for printing an attributed character by printing a character part and an attribute part separately, the invented printer or typewriter is so constructed that only an attribute part, e.g., an underline part or a bold face part, is printed in case a printed character is detected to already have the attribute, i.e., is underlined, or bold face, thereby preventing a character part of the printed character from being double printed. This results in improved quality in printed characters and in complete clear character erasures. The printer is also effective for overprinting attribute parts to over a desired range of printed characters.

Abstract: A method of dot-printing underline or the like employing a print head and power source with relatively small capacity. The reciprocation of the print head is divided into a plurality of travels by the command of divisional print so that the required underline print is performed by the collected dot prints being printed at intervals on each of a plurality of travels of the print head. A rest time will be provided between each printing actions at intervals of the print head to reduce the capacity of a power source employed for driving the dot pins in the print head.

Abstract: A dot-matrix print controller having a dot pattern generating means for generating a dot pattern to be printed and a means for supplying current pulses to a dot-matrix print head in accordance with an output of said dot pattern generating means, said controller comprising a counter means for counting the number of dots of a dot pattern to be printed; and a pulse width control means for controlling the width of said current pulses applied to said print head so that the thickness of print is constant.

Abstract: There is disclosed an apparatus for and a method of printing complex characters using a high speed bidirectional on-the-fly printer. In accordance with the present method complex characters are printed in at least two steps. Once the first portion of a character has been printed and prior to the printing of the next character the carrier is turned around and again moved past the print position where the remaining portion of the first mentioned character is printed. This approach is termed "double turnaround".

Abstract: A baseplate attachment (12) having actuator elements which extend into an electrical typewriter (13) to initiate operations in response to signals indicative of successive characters to be printed further provides for dead key print operations when desirable including at typewriters which have no built-in mechanism for such purpose. Dead key mechanism (11) on the attachment responds to a dead key signal in conjunction with a print signal by suppressing the character spacing escapement operation of the typewriter that normally follows printing of a character. The capability of dead key printing simplifies and speeds certain operations during automatic printout. For example, underscored characters may be printed without back spacing operations. If a specialized printing element with two underscores is used in the typewriter, the underscoring may also be accomplished without case shift operations. Repetitive printings of a character at a single space may be made to provide boldface emphasis.

Abstract: A character overprinting apparatus and method for overprinting in a laser non-impact printer is disclosed. Control bits are generated and assigned to data words transmitted from a host system. An underline control bit identifies whether the associated data word will require underlining and a data control bit identifies the data word as a character space or a character shape. An intermediate storage register stores a line of data words and associated control bits for overprinting. Stored data words and associated control bits from the intermediate storage register and data words and associated control bits from the host system are compared in an overprinting circuitry means to effect a selected merger of the data words and a selected modification of the control bits. The merger and modification are done in accordance with a pre-selected set of overprint rules.

Abstract: An electronic typewriter having a display device which shows just the last entered characters of a printing line. The typewriter comprises a selector for an immediate typing mode of the entered character, a line/line mode in which each line is set up in memory and typed on operating a service key, and a word/word mode in which the set up words are typed word by word, i.e. on each operation of the space bar. This facilitates typing with checking to eliminate all errors. The display device shows emphasized characters, different kinds of emphasis (heavy type, light type on dark background being indicated by different luminous dot patterns under the characters. The display device is of the dot matrix type and, by suitable circuits thereto superposed characters, e.g. 0 and 1 yielding .phi., are correctly shown.

Abstract: Line printer having a plurality of coaxially arranged rotatable printing rings each bearing a series of characters to selectively effect printing on a paper and a platen movable toward in contact with and away from the printing rings so as to effect printing on the paper interposed between the platen and the printing rings when the platen abuts against the printing rings, each of the printing rings being selectively arrested by a select lever actuated by the printing signal from a control system of the printer thereby positioning desired characters of the respective printing rings in the printing position at which the platen abuts against the printing rings so that a line of printing is produced on the paper simultaneously. The printer comprises a mechanism for additionally printing a mark such as an underline and the like adjacent to particular characters printed on the paper. The mechanism is moved to the printing position by a signal from the control system.