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| Number | Title | Issue Date |
| 6997036 | Vehicle impact testing device A vehicle impact testing device is provided with a towing device for running a test car along a running road surface to collide with a barrier. The towing device is movably suspended from a pair of guide rails received in a recess formed below the running road surfa... | 02/14/2006 |
| 6835011 | Impact dot printing head control apparatus With an impact dot printing head control apparatus according to the invention, the drive control of respective wires is implemented on the basis of a normal fire and a pre-fire by generating the normal fire for driving the respective wires of the impact dot printing... | 12/28/2004 |
| 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 head control apparatus 10 comprises: a dot classifier for... | 07/03/2001 |
| 5819649 | System and method for printing on a moving substrate A system for printing an image onto a target area of a moving substrate with an actuatable print head having an actuation delay time, the substrate movable at a variable speed to a print position relative to the print head. The system includes a trigger s... | 10/13/1998 |
| 5439302 | Self-adjusting controller for dot impact printer A controller for a dot impact printer has capacitance sensors for sensing the motion of the dot wires in the print head, and a non-volatile, rewritable memory for storing self-adjustment data relating to dot-wire characteristics. A processor controls the ... | 08/08/1995 |
| 5429442 | Print hammer coil current control A low cost, integrated circuit compatible, circuit for constantly controlling the current in a print hammer coil is provided. The circuit is suitable for use with a hammer coil driven from the low voltage side (bottom drive) and in series with a sense res... | 07/04/1995 |
| 5383399 | Zero hammer adjustment drum printer control technique A method and apparatus for controlling the adjustment of printer hammers which impact against an associated moveable member on which characters are present. Each hammer includes a coil which is energized at the appropriate time, taking into consideration ... | 01/24/1995 |
| 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 print data supplied for respective drive elements and a driv... | 10/18/1994 |
| 5330277 | Drive system for wire dot head A drive system for a wire dot head is provided with sensors for detecting displacements of corresponding print wires. Each sensor outputs a movement initiation timing signal and an impact timing signal for the corresponding print wire. An electric current... | 07/19/1994 |
| 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 characters and printing ghost from occurring, a braking pulse is ... | 04/12/1994 |
| 5295750 | Wire-dot impact printer In a wire-dot impact printer having a capacitance detector for detecting a displacement of each armature by a sensor electrode arranged opposite the armature, a space is formed between each sensor electrode and its associated armature, and a shield patter... | 03/22/1994 |
| 5263994 | Printer having a plurality of printing modes The dot impact printer of the invention sets an optimum printing speed based on various factors, such as kanji or alphanumeric characters, and to set an optimum brake pulse and an optimum energizing energy corresponding to the set optimum printing speed. ... | 11/23/1993 |
| 5244289 | Printer having device for adjusting print hammer stroke A pair of main frames extend in frontward/rearward direction of a printer body. The pair of main frames are pivotally supported on a guide shaft and laterally movable therealong. The main frames are slidingly guided by a guide member through abutment memb... | 09/14/1993 |
| 5230283 | Print hammer position control device A print hammer is moved toward a printwheel and impinges thereon to thus make a character impression on a sheet of paper supported on a platen. The print hammer is moved in accordance with rotations of a cam which in turn is rotated by a motor. An encoder... | 07/27/1993 |
| 5201876 | Method of adjusting the impact energy of a letter key or type element of a printing machine and typewriter, printer or the like printing machine using that method The method for determining impact energy of a type element of the printing machine includes providing at least two different-length flight paths for the type elements by changing a distance between a resting position of the hammer and a place of impact of... | 04/13/1993 |
| 5171094 | Printing apparatus having high impact erasing mechanism Upon operation of an erasure key for erasing a printed character, a correction ribbon is moved in an erasure position according to rotation of a motor, and then, the motor is continuously rotated forward at a current I2 larger than a current I1 in a print... | 12/15/1992 |
| 5147141 | Driver circuit for piezoelectric actuator, and dot-matrix head and printer using piezoelectric or other actuator having discharge control means A driver circuit for driving a piezoelectric element, including a charging circuit having a DC power source and a coil for charging the piezoelectric element, and a discharging circuit for discharging the piezoelectric element. When the piezoelectric elem... | 09/15/1992 |
| 5147142 | Impact type recording apparatus having reduced impact sound during return of the hammer An impact type recording apparatus includes a platen for supporting a recording medium, a hammer guided for reciprocal movement between an impacting position in which it strikes against the platen and a retracted position spaced apart from the platen, ene... | 09/15/1992 |
| 5092692 | Print pressure retrival from ascending order table A printer has a memory containing print information on a plurality of characters, grouped by a print pressure of the character, and a control unit for controlling the print pressure in accordance with the print information stored in the memory. The memory... | 03/03/1992 |
| 5071268 | Wire-dot print head driving apparatus having sensing coils In a driving apparatus for a wire-dot print head having electromagnets for driving print wires, each electromagnet comprising a core and a coil, sensing coils are provided in association with the respective electromagnets and provided to interlink the mag... | 12/10/1991 |
| 5066150 | Low cost quiet impact printer A serial impact printer including a platen mounted for rotation upon a support frame, a print element having character imprinting portions disposed thereon and a print element selector for moving the print element to position a selected character imprinti... | 11/19/1991 |
| 5046413 | Method and apparatus for band printing with automatic home compensation A system and method for automatically compensating for inaccuracies in the positioning of the timing mark sensor of a band line printer. A selected hammer is operated to impact a test character and an adjacent space between characters or a space provided ... | 09/10/1991 |
| 5044793 | Hammer device having adjustable striking force A hammer device generates a magnetic moving force in a magnetic member by energizing a coil, whereby a hammer strikes a recording sheet to form a record thereon by means of its moving force, the striking force of the being capable of regulation by changin... | 09/03/1991 |
| 5039238 | Dot-matrix printer with impact force determination In a dot-matrix printer including a wire-dot print head having print wires which print dots by impact on a printing medium, and a sensor for sensing the position of the print wires and generating signals indicating the position of the print wires, a param... | 08/13/1991 |
| 5039237 | Dot matrix print head drive method In a dot matrix print head drive method for controlling head drive signals for driving dot pins in accordance with print pattern signals, a correction factor is set specifically to each dot pin; and the length of time for which the print pattern signals a... | 08/13/1991 |
| 5037217 | Dot-matrix impact printer using piezoelectric elements for activating print wires A dot-matrix impact printer, including a print head including a piezoelectric element, and a print wire which is movable from a non-operated position thereof to an operated position thereof, owing to displacement of the piezoelectric element, to produce a... | 08/06/1991 |
| 4944617 | Encoder employing a shock absorbing tension spring An encoder having a special construction which includes a special tension spring which increases the life of the encoder. The tension spring has first and second "U"-shaped portions formed on one end thereof with the remaining end of the spring being secu... | 07/31/1990 |
| 4911568 | Printer A printer comprises a type wheel, a hammer to hit a wheel, an ink ribbon, a carriage, a detector for detecting first and second positions of the hammer, and a controller responsive to the detector for generating the first and the second control signals to... | 03/27/1990 |
| 4881835 | Printer having adjustable gap between print head and recording medium A printer including a gap changeover device for moving a print head and a platen relative to each other and thereby adjusting a head gap between the print head and a recording medium on the platen. A switch is provided to produce a signal where the record... | 11/21/1989 |
| 4880325 | Ink ribbon cassette including means for identifying the type of ink ribbon contained therein and containing an ink ribbon having end indication means An improved ink ribbon cassette for a serial printing apparatus comprises a body, first and second substantially coextensive spaced ink ribbon guide arms projecting from the body, each having a free end, and an ink ribbon mounted in the body for advanceme... | 11/14/1989 |
| 4877342 | Method of moving print elements in printheads and a printhead with moving mechanism for print elements The invention relates to a method in printheads (1) with a plurality of print elements (4) arranged movable in relation to each other and a moving mechanism (7, 9, 11, 12, 14) with magnetic field-responsive forces for moving selectable print elements to p... | 10/31/1989 |
| 4867584 | Impact mechanism for impact printer An impact mechanism for use in an impact printer, to deliver a printing force to drive a character element against a platen by means of a print tip movable toward and away from the platen. A rockable bail bar having an axis of rotation substantially paral... | 09/19/1989 |
| 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 method and apparatus establishes a minimum time period for ... | 07/18/1989 |
| 4846593 | Printing apparatus system with a plurality of interchangeable type units A printing apparatus system includes a plurality of type units each having a plurality of type elements and each being different from the others. Each type unit may be mounted in the apparatus. A detector detects which of the type units is so mounted and ... | 07/11/1989 |
| 4838157 | Digital printhead energy control system A digital printhead energy control system includes a first storage device for receiving hammer pulse duration data, a second storage device for receiving hammer pulse energization data and for producing a trigger signal and hammer pulse energization signa... | 06/13/1989 |
| 4818128 | Impact printer capable of being equipped with an auto sheet feeder An impact printer which can be equipped with an auto sheet feeder comprises printing means, driving means for driving the printing means and controlling means for controlling the driving means so as to reduce the printing strength of the printing means wh... | 04/04/1989 |
| 4806031 | Uniform print density and registration in an impact printer Commencing with the first print hammer(s) "out", or actuated, on each print line the hammer drive current is boosted 10% for a period, ranging from 25%=650 microseconds for single part forms to 50% for multi-part forms, of the total print hammer flight ti... | 02/21/1989 |
| 4797017 | Wire dot matrix printer capable of printing letters on a plurality of superposed sheets of paper Disclosed is a wire dot matrix printer capable of printing letters on a plurality of superposed sheets of paper, in which there is provided a drive current adjuster for continuously increasing and decreasing the drive current of solenoids which move print... | 01/10/1989 |
| 4774882 | Method for controlling printing impact power in impact type dot printer A method for controlling printing impact in an impact type dot printer which controls printing impact energy to be increase in case of normal density imprint function and to be decreased in case of high density imprint function in the controlling means of... | 10/04/1988 |
| 4747709 | Printing apparatus with variable impact pressure In a printing apparatus address data accesses an address of a time table to vary an impact pressure and supplementary data of each typeface (or character) of a printing type wheel. Thse data are stored in various memories. Data input/output and its proces... | 05/31/1988 |
