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| Number | Title | Issue Date |
| 6196661 | Serial recording apparatus It is intended to expand the recording width of the serial printer by executing the one-directional recording, instead of the two-directional recording, according to the required recording width. For this purpose there is provided a serial recording appar... | 03/06/2001 |
| 6024434 | Recording apparatus with ink jet recording head A recording apparatus for performing recording on a recording medium with an ink jet recording head capable of ink jetting is described. The recording head is closed by capping after turning off the power source or during waiting or when no data is provid... | 02/15/2000 |
| 5998956 | Recording apparatus A higher-performance, energy saving recording apparatus, having a stepping motor as a driving source, presumes an out-of-phase state of the stepping motor. Driving setting parameters of the stepping motor are changed when an out-of-phase state of the step... | 12/07/1999 |
| 5918991 | Printing apparatus and control method for pitch and motion commands A printing apparatus and control method facilitating the development of application software that can be used with different printers when the horizontal and vertical pitches of their respective mechanical transports vary. Based on a received base pitch c... | 07/06/1999 |
| 5915861 | Method and apparatus for driving a stepping motor using digital pulse trains simulating sine and cosine waves The method for driving a stepping motor for printers comprises the generation of first pulses (16A,16B) at n levels recorded in registers and representing a simulation of sinusoidal waves. The maximum level is applied during two consecutive microsteps to ... | 06/29/1999 |
| 5871291 | Recording apparatus, method and information-processing system A recording apparatus includes: a carriage that relatively moves against a recording medium, on which a recording head for recording an image of input information on a recording region of the recording medium is mounted; and a driving device for driving t... | 02/16/1999 |
| 5861726 | Recording apparatus with a step motor controlling mechanism An ink jet recording apparatus has a recording head mounted on a carrier which is shifted by a stepping motor in recording. The stepping motor is also utilized as a power source of a recovery system device. The drive mode of the stepping motor for the rec... | 01/19/1999 |
| 5857787 | Printer and motor having a balanced buck drive A dot matrix printer and motor having hammers forming in part a hammerbank and a counterbalance mechanically linked to the hammerbank with a link to the position of the motor. The motor includes coils positively driven and then negatively driven after cur... | 01/12/1999 |
| 5547295 | Carriage driving method and apparatus for efficiently accelerating to a constant speed A carriage driving motor is driven with acceleration during a time period substantially equal to the half period of periodic vibration generated in a carriage in its moving direction when the carriage shifts from a stopped state to a moving state. Subsequ... | 08/20/1996 |
| 5478164 | Method of driving DC motor in printer When a DC motor is restarted, a drive signal for the DC motor serves as a pulse signal. Even when a printer is stopped under a maximum load, the DC motor may be restarted a plurality of times, thus vibrating the DC motor and reducing the degree to which t... | 12/26/1995 |
| 5431502 | Carriage motor controller for printer A carriage motor controller for a printer. The controller includes a drive mechanism for driving a carriage motor to thereby cause a carriage to travel; a detector for detecting a position and a speed of the carriage while the carriage is travelling; a me... | 07/11/1995 |
| 5367239 | Printer carrier driving method Disclosed is a method for driving a printer carrier. One power source is connected via a constant current circuit to the carrier motor. Data storing means stores the current command data corresponding to the acceleration, constant speed printing and decel... | 11/22/1994 |
| 5251039 | System for reciprocating optical units of different speeds in opposite directions by use of two motors A device for driving optical units for scanning manuscript and provides that movement of the optical units during scanning is achieved by a first pulse motor exhibiting low-noise and high-torque characteristics within a motor speed range suitable for achi... | 10/05/1993 |
| 5245359 | Recording apparatus with recording head carriage driving motor control This invention discloses a recording apparatus for effecting recording by moving a carriage which supports a recording head, along a recording material. The apparatus is provided with a motor speed controller for a closed-loop control of the rotating spee... | 09/14/1993 |
| 5207520 | Printer carriage acceleration control device A device for PWM control of the printer carriage motor (1) which has a circuit (65) for generating a first PWM pulses of 100% duty ratio, a circuit for computing second PWM pulses (31, 37, 39, 15, 17, 53, 57, 59) according to the PI control method based o... | 05/04/1993 |
| 5147143 | Printer carriage homing mechanism A printer which includes a position controller for moving a printing head to a predetermined initial position by driving a stepping motor during initial processing operation, and a current controller for supplying a second current to the stepping motor to... | 09/15/1992 |
| 5097189 | Recording apparatus A recording apparatus in which a stepping motor is used as a driving source to reciprocate a carriage on which a recording head is mounted and recording is executed by the recording head in accordance with the timing when the stepping motor rotates. The a... | 03/17/1992 |
| 5075609 | Recording apparatus A recording apparatus in which the movement of a recording head for recording scanning is effected includes a carriage carrying the recording head thereon, a step motor for moving the carriage, a linear encoder for detecting the amount of movement of the ... | 12/24/1991 |
| 5051012 | Carriage positioning for multiple impact printing In a printing device capable of executing printing operation in a bold face print mode, provided are means for controlling a carriage so as to be stopped in a predetermined period of time before the first printing operation is executed so that an inconven... | 09/24/1991 |
| 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 at the present position of the carriage and stepping the c... | 07/23/1991 |
| 5032781 | Method and circuit for operating a stepping motor In a method and circuit for operating a stepping motor having several windings, and wherein a movement of the stepping motor induces a voltage in a winding which is not required at the time for generating a propulsive force, the induced voltage is evaluat... | 07/16/1991 |
| 5029264 | Recording apparatus The present invention provides a recording apparatus wherein recording is performed by reciprocably shifting a carriage on which a recording head is mounted by means of a stepping motor and which comprises a rotational position detection device for detect... | 07/02/1991 |
| 4928050 | Recorder A data recorder in which a recording is moved by stepping motor whose rotor rotation angle is detected, the stepping motor having a current switching circuit which controls the application of excitation current to the drive coils of the motor in accordanc... | 05/22/1990 |
| 4897589 | Apparatus for indexing an origin of a moving member Disclosed herein is an origin indexing apparatus applicable to a printer. A moving member, such as a printing head mounted on a carriage, is moved by a stepper motor which rotates in stepwise fashion by sequentially changing excited phase by a predetermin... | 01/30/1990 |
| 4869610 | Carriage control system for printer A carriage control system for a printer which effects printing by moving the carriage mounted on a print head to reduce the distance on either side of the printing area required for acceleration and deceleration. Various approaches to rapidly and accurate... | 09/26/1989 |
| 4707649 | Motor controlling system A motor controlling system in which a stepping motor can be always stopped at a constant or predetermined position. During initialization an excitation phase is stored after the motor has been detected to have passed a particular position. During actual o... | 11/17/1987 |
| 4707159 | Serial printer including a laterally reciprocable recording head, paper bail control, paper detection and feeding means, a multicolor ink ribbon including a head cleaning zone, a ribbon cassette and ribbon shift means A printer for performing recording successively while a recording head moves backwards and forwards in a predetermined direction with respect to a recording medium such as paper. A paper hold roller for pressing the recording medium against a platen in th... | 11/17/1987 |
| 4706008 | Self-adjusting homing for a stepping motor For step motors positioned in response to an external reference location, correction for potential one step misalignment is provided. The method and the apparatus of the invention provide a read/write memory, for storing therein a phase state of the step ... | 11/10/1987 |
| 4701685 | Controlling a d.c. motor A d.c. motor is controlled by means of current pulses; each pulse ends by and in synchronism with an optical disk pulse. The period between respective two pulses is referenced to a particular period for determining the sign of a speed derivation, and the ... | 10/20/1987 |
| 4693618 | Dot matrix printer providing multiple print pulses for one energization of a printing head stepping motor A dot matrix printer provided with a printing head having vertically aligned plural printing elements and displaced in the transversal direction of the printing sheet by a stepping motor, in which printing pulses of at least two dots are generated during ... | 09/15/1987 |
| 4692045 | Printing apparatus capable of correcting printed characters by offset prints There is disclosed a printing apparatus provided with a mechanism for erasing printed characters by actuating a type font through an erasing ribbon and a mechanism for selecting characters by rotating the type font, wherein the erasure of a printed charac... | 09/08/1987 |
| 4669900 | Home position setting system for a print carriage The printer is characterized by construction adapted to detect the offsetting of the carriage from its intended position by signals of a sensor which detects the carriage offset at a first position spaced by a predetermined distance in the opposite direct... | 06/02/1987 |
| 4631457 | Method of leading a moving body driven by a direct current brushless motor to a starting position The present invention relates to a method of leading a moving body, such as a print head carrier of a printer of the like, which is driven by a direct current brushless motor, to a starting position. The direct current brushless motor, which forms part of... | 12/23/1986 |
| 4628239 | Dual optical mechanical position tracker Apparatus for retaining control of moving carriage impact dot matrix print eads when subjected to strong external forces such as shock and/or vibration. Position and direction of carriage movement is provided by a photo emitter-sensor assembly and a slotte... | 12/09/1986 |
| 4602882 | Control system of serial printer A serial printer includes a control circuit for driving the printer carriage. The control circuit detects the change of level of a home position signal in synchronism with a print position signal which is produced based upon occurrence of particular data ... | 07/29/1986 |
| 4589790 | Method and apparatus for controlling escapement A method and apparatus for minimizing escapement positioning error by matching the move sequence of a print carrier to the mechanical system dynamic characteristics without the use of a feedback sensor are described. A plurality of constant velocity signa... | 05/20/1986 |
| 4558965 | Printing apparatus controlling advancement of printing paper, actuation of a hammer, and advancement of an ink ribbon A printing apparatus comprises a type wheel carrying a plurality of type elements and a platen for mounting and advancing a printing paper. A hammer can strike any one of the type elements against the printing paper and an ink ribbon is positionable betwe... | 12/17/1985 |
| 4461984 | Linear motor shuttling system A linear motor shuttling system for shuttling the print head (11) of a dot matrix line printer is disclosed. The print head (11) is supported by a pair of flexures (13, 15) such that the head is free to move back and forth along a print line. One end of t... | 07/24/1984 |
| 4460968 | Print head motor control with stop distance compensation A control system for a bidirectional printer having a print head carriage movable at different speeds on different printing lines provides for equal stopping distance in the margin at both high and low speed operation. This is accomplished by delaying the... | 07/17/1984 |
| 4459054 | Shared character selection, escapement and line advance system for serial printer A serial impact printer 11 includes a frame 15 mounted drive motor 47 coupled to a print wheel 31 to effect rotation thereof. The print wheel 31 is mounted on a movable print carrier 29 which serially moves from print position to print position along the ... | 07/10/1984 |
