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7588379 Drive motor control method and printer  
A method of controlling a drive motor that is provided to a printer to apply a driving force to a predetermined operation section that operates in an image printing operation of printing on a...
7059787 Motor control method and apparatus, time recorder having same and impact type printing apparatus  
An impact printing apparatus is also disclosed with printing pin actuation timing correction dependent upon scanning speed or platen shape, striking duration timing dependent upon scanning rate, or...
6698955 Method and apparatus for adjusting print positions of dot line printer  
A control circuit generates two sorts of printing timing signals on the basis of the position of the printing mechanism module detected by a detector, and sends the generated signals to respective...
6254291 Dot-impact printing head control apparatus  
A printing head control apparatus 10 is used for a dot-impact printer in which a dot is formed on a paper set on a platen via an ink ribbon 16 with an impact force applied by a pin 18. The printing...
6227730 Thermal transfer printer without printing displacement  
The invention intends to obtain a good printed result without creating displacement of printing positions when printing is performed on a piece of printed paper with different contact pressures of...
5674014 Printhead driver circuit for line printers  
A printhead drive circuit to be utilized in impact printers is disclosed. In accordance with a preferred embodiment of the present invention, the printhead driver circuit includes a first switch, a...
5524989 Print element assignment in printing apparatus  
The invention relates to a printing apparatus in which at least two printing elements are arranged a predetermined distance apart in a line parallel to the print direction. When two dots to be...
5480239 Postage meter system having bit-mapped indicia image security  
A deterrent to counterfeiting of indicias on mailpieces is provided in a method and apparatus for implementing the printing of the indicia using a customized printhead or customized printer drivers...
5413423 Print element drive control with constant current charge and discharge of capacitor  
A dot matrix printer having a print head having a plurality of print solenoids. The print head is carried on a print head carriage driven by a carriage drive arrangement. A print timing means...
5385414 Printing head and its drive timing control circuit for impact printer  
In a serial impact printer, a printing head having an impact wire pin array of two arrangement lines is mounted on a carriage in such a way that the pin arrangement lines are inclined by an angle...
5356228 Apparatus for driving adjacent elements in a wire-dot print head  
In a wire dot printer having a wire-dot print head provided with wire drive elements disposed in sequence, the energization of the respective wire drive elements is controlled in accordance with...
5310270 Printing method for dot impact type serial printer  
A dot impact type serial printer is provided with a print head which has a plurality of print wires for printing an image. The print wires required to print a particular image are thrust toward a...
5302035 Method of driving wire-dot print head  
To suppress a secondary bound of a print wire of a dot matrix printer which may occur after a single dot or continuous dots are printed and also to prevent both density variation of printed...
5291824 Dot line printer having ordinary low dot and high dot density printing modes  
A dot line printer provided with an ordinary dot density printing mode, a low dot density or draft printing mode and a high dot density printing mode. A hammer bank provided with a plurality of...
5219233 Process for controlling the operation of a print head  
A process for controlling the operation of a printing head detects defects in the transport of the printing head along a printed line and if necessary corrects them. A control unit (24) controls a...
5217310 Printing control method  
A print head of a dot printer is controlled to move at a speed that is a function of a maximum dot duty cycle value from an accumulation of dot duty cycle values that are functions of the numbers...
5200764 Print head assembly for use in an ultrasonic printer  
The present invention relates to a print head assembly for use in an ultrasonic printer. The print head assembly comprises at least one print head which is slidably mounted in a block which is...
5186550 Impact printer  
An impact printer having a platen, an impact printing member such as a printing wire, a driver such as a driving coil for driving the impact member, a controller for controlling the driver and a...
5163762 Driving circuit for solenoid head of a printer  
In a printing head, which is employable in a printer, having a predetermined number of printing pins respectively connected to solenoids circularly disposed along a predetermined circle, the...
5150108 Method for slanting a generic font format while inserting corrective pixels to improve print quality  
A method of italicizing a font includes the steps of slanting a symbol stored in a generic font format as an arrangement of pixel locations by offsetting the arrangement of pixel locations at a...
5149212 Dot printer with changeable quality dot pattern  
In a dot printer having a print head, a moving mechanism for laterally reciprocating the print head relative to a recording medium, a driving circuit for driving the print head, a memory for...
5088847 Setting variable character width in matrix printer  
When a specified head energizing pulse interval involves a decimal fraction, the fraction is accumulated at every printing, and when the cumulative value of the fraction is smaller than one pulse,...
5071269 Wiring of actuators in a wire-dot print head  
In a wire-dot print head which comprises print elements arranged in a ring, each having an electromagnet formed of a core and a coil, and in which the electromagnets are divided into a plurality of...
5048984 Matrix printer  
In matrix printers, the printing elements in the printing head are frequently arranged so that they do not correspond to the printing raster of the characters to be printed so that the informations...
5033889 Open loop carriage control for dot-matrix printer using tables  
A method for operating a dot-matrix printer to allow printing in the accelerating and decelerating regions of the carriage traverse, which comprises the steps of: firing the wires for registration...
4971464 Dot serial printer  
In a dot serial printer suitable for bidirectional printing of enlarged letters and the like, a signal for starting printing is produced with a time delay of m/n times the dot drive period relative...
4887226 Dot printing device capable of printing underline together with characters  
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,...
4869609 Method of controlling printing positions in a printer and an apparatus therefor  
Upon supply of electric power to a printer, a dot pulse is generated from a dot pulse generator each time a carriage driving motor rotates for a predetermined rotational angle, and thereafter, an...
4850724 Control circuit for dot matrix printing head  
Control circuit for a dot matrix printing head of the permanent magnetic type or simple electromagnet type, wherein a printing element is subjected to a variable magnetic flux, owing to an...
4848943 Method and apparatus for energizing a printhead  
A method and apparatus for energizing a printhead by maintaining substantially constant peak current in the actuator means of the printhead regardless of the duty cycle of the actuator means. The...
4834562 Print control apparatus  
A print control apparatus for a dot printer such as serial printer or line printer comprises a print head having a plurality of dot elements, a drive mechanism for driving the dot elements and a...
4833626 Optimizing printer throughput  
A method of improving printer throughput by selecting a print velocity based on the characteristics of a line to be printed. Incorporated into an application program are all available printing...
4772140 Print head drive system with trouble detector  
A print head drive system of the type wherein there is provided a one-shot generating circuit for generating one-shot pulses in response to an instruction given from a processor and the...
4737924 Dot matrix type serial printer  
A serial printer of a dot matrix type wherein the pitch of dots oriented in the direction in which characters are to be printed in a matrix of dots is varied in a minute amount, to thereby adjust...
4713623 Control system for matrix print head  
A system for printing dot-matrix characters wherein a double column of dot forming elements is used, and no single dot forming element is required to print more often than once in any four column...
4685814 Apparatus for dot-matrix printing of characters missing from a type carrier  
A composite printing apparatus includes a character-based impact printer, a dot matrix printer, and a memory for storing a plurality of sets of pattern data corresponding to different fonts and...
4683818 Print element control  
A control for a dot matrix shuttle printer executing a sinusoidal velocity traversal across a line on a print medium comprises calculating the instantaneous position locations of the print elements...
4684269 Apparatus for printing with character fonts and dot-matrix printing in the same line  
A composite printing apparatus including a first printing assembly which has character fonts, and a second printing assembly for printing characters with a matrix of dots, wherein a series of input...
4653941 Impact dot matrix printer  
An impact dot matrix printer is disclosed in which a print head consisting of an array of dot pins constituted by wires arranged in a vertical direction faces a printing sheet via an ink ribbon and...
4650348 Method of dot-printing underlines  
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...
4643596 Impact type dot printer  
An impact dot printer has a print head which reciprocates back and forth in front of a rotationally driven platen to print dot matrix characters on a recording medium. The print head includes a...
4637742 Wire drive circuit in dot-matrix printer  
A wire drive circuit in an impact dot-matrix printer, having plural solenoids for actuating print wires, a first switching element connected commonly to one ends of the solenoids, plural second...
4637307 Automatic mechanical resonant frequency detector and driver for shuttle printer mechanism  
The detected phase difference between a sensed motion velocity signal and an electric motor driving signal is used to drive a phase-locked loop which automatically generates a sinusoidal reference...
4588316 Optically controlled multi-color impact printer  
An inherently rugged multi-color dot matrix impact printer having a yoke type optical code detector assembly mounted on the neck portion of an impact dot matrix print head through which a...
4584573 Combined character and background pattern print control system  
A print control system for a word processing apparatus includes a character pattern data generation circuit and a background pattern data generation circuit. The character pattern data developed...
4547780 Printer with manual paper feed and weigh scale incorporating the same  
A hand-fed printer for sheet material is described which includes an electronic print head, e.g., a dot matrix wire print head, a channel for cut sheets such as a slot that is open along one edge...
4518270 Multicolored printing  
A matrix printer is operated with a multicolor band ink ribbon which changes position vis-a-vis print styli. Through a combination of paper shifts and ribbon position shifts, as well as selective...
4508463 High density dot matrix printer  
A high density dot matrix printer is disclosed which can print characters with variable font and having print resolution close to that of a typewriter. Printing on both a forward and reverse pass...
4485425 Drive circuit for printer, particularly, matrix printer of the needle or hammer variety  
The drive circuit for an electromagnetic actuator for the impact element in a printer includes a series circuit of a drive transistor and of a switching transistor there being a reference resistor...
4473311 Print wire drive assembly for dot-matrix printers  
A print wire drive assembly for a dot-matrix printer having a plurality of solenoids selectively driving print wires. The solenoids are disposed, in plural groups which are not energized...
Matches 1 - 50 out of 65 1 2 >