By Electric Or Magnetic Power Patents (Class 400/322)
  • Patent number: 9695916
    Abstract: Provided is a differential member that is used in a surgical instrument, which may be manually operated to perform laparoscopic operations or various surgical operations, to receive an input of two or more rotation motions or translation motions and output a single rotation motion or translation motion.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: July 4, 2017
    Assignee: LIVSMED INC.
    Inventor: Jung Joo Lee
  • Patent number: 7914112
    Abstract: The invention relates to a printing apparatus that performs printing by scanning a carriage that has a print head in a main scan direction. The printing apparatus according to an aspect of the present invention includes: a carriage motor that drives the carriage; a control unit that controls the driving of the carriage motor; a memory unit that stores a plurality of patterns of velocity data regarding at least either one of scanning speeds of the carriage after start of the scanning and driving speeds of the carriage motor corresponding to the scanning speeds of the carriage; and a driving mode switchover unit that switches over the patterns of the velocity data, wherein the control unit controls the driving of the carriage motor in such a manner that the carriage is scanned on the basis of the velocity data selected by the driving mode switchover unit.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: March 29, 2011
    Assignee: Seiko Epson Corporation
    Inventors: Toru Hayashi, Tetsuji Takeishi
  • Patent number: 7896565
    Abstract: A print head is operable to perform printing with respect to a medium. A motor is operable to move the print head. A guide unit is operable to guide the print head along a predetermined direction. A determination unit is operable to determine whether or not the print head performs a stick-slip operation. A motor control unit is operable to generate a command value for controlling the motor when moving the print head. The motor control unit generates a command value for moving the print head at a predetermined target speed on the basis of determination of the determination unit that the print head does not perform the stick-slip operation and generates a command value for moving the print head at a target speed faster than the predetermined target speed on the basis of determination of the determination unit that the print head performs the stick-slip operation.
    Type: Grant
    Filed: March 26, 2007
    Date of Patent: March 1, 2011
    Assignee: Seiko Epson Corporation
    Inventors: Hitoshi Igarashi, Kaoru Koyama
  • Patent number: 6953294
    Abstract: According to the claimed invention, a positioning apparatus is disclosed. The positioning apparatus comprises a motor and a Scotch yoke for controlling the position of a first printer part. The motor is for providing a rotational motion to the Scotch yoke. In response, part of the Scotch yoke moves in a linear fashion. As a result of the linear motion of the Scotch yoke, the position of the first printer part can be controlled.
    Type: Grant
    Filed: February 19, 2004
    Date of Patent: October 11, 2005
    Assignee: Hi-Touch Imaging Technologies Co., Ltd.
    Inventors: Chui-Chien Chiu, Kai-Min Chu
  • Patent number: 6921147
    Abstract: A recording apparatus can improve stability of the speed of a carriage without increasing the production cost. The recording apparatus for performing recording by discharging ink from a recording device onto a recording medium includes a carriage adapted to convey a recording head, and a conveying member adapted to drive the carriage using a belt stretched between pulleys connected to corresponding ones of two motors. A driving force for the carriage by the two motors is differently distributed.
    Type: Grant
    Filed: April 18, 2003
    Date of Patent: July 26, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventors: Reiji Mitarai, Haruhiko Tanami
  • Publication number: 20040184860
    Abstract: A carriage driving apparatus that drives a carriage of a printer or the like by a motor and a motor control method for controlling the motor can substantially eliminate variation in control accuracy among individual apparatuses. Each set of various parameters are determined with respect to each ultimate target speed of the carriage and each moving direction, and contained in a table. Three kinds of tables, i.e. a table for heavy load, a table for light load and a table for standard load in accordance with the difference in load applied to individual drive systems of the carriage, as well as one kind of table for low temperature are prepared and stored on a ROM. It is determined which of the three kinds of tables should be selected at normal temperature by actually driving the carriage in the final step of the manufacturing process.
    Type: Application
    Filed: January 30, 2004
    Publication date: September 23, 2004
    Applicant: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Shinya Kato, Daisuke Kozaki
  • Patent number: 6715947
    Abstract: A low rotational inertia shuttle system (24) for a dot matrix line printer (20) is disclosed. The low rotational inertia shuttle system (24) includes an elongate support structure (26), a carriage (22) and a counterbalance (62). The carriage and the counterbalance are reciprocally mounted on the support structure. The low rotational inertia shuttle system also includes a reciprocating assembly (60) disposed on the support structure for reciprocating the carriage and the counterbalance. The reciprocating assembly has an inertia that is purposely minimized with respect to the mass of the carriage and the counterbalance, such that the printer operates at a substantially constant level of kinetic energy to produce a substantially linear velocity profile for the carriage.
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: April 6, 2004
    Assignee: Tally Printer Corporation
    Inventors: Craig Jack Cornelius, John Wayne Whiting, Charles Gordon Whitaker
  • Patent number: 6695498
    Abstract: An impact printer having one or multiple lines of hammers on a hammerbank for impacting a print ribbon against a print media after release by one or more electrically energized coils in a magnetic circuit with one or more pole pieces retaining the hammers prior to impact. One or more of the coils has a spaced winding thereby allowing filling of the spaced winding during return winding. Another embodiment utilizes a longitudinal return from an initial winding which can be formed with multiple layers or multiple overlappings of the longitudinal return. The foregoing minimizes a first dimension while having controlled wire crossing resulting in expansion in a second dimension, thereby allowing compaction of magnetic circuits in the first dimension.
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: February 24, 2004
    Assignee: Printronix, Inc.
    Inventors: John Stanley Kinley, Gordon B. Barrus
  • Patent number: 6554395
    Abstract: A print head motor control system uses a desired function of print head position versus time and a measured print head position to form an error signal. The print head controller forms a motor drive signal from the sum of a first term corresponding to the square root of the absolute value of the error signal and a second term corresponding to a dead band signal having a predetermined slope if said error signal exceeds a predetermined value. The desired function of print head position versus time may be formed by double integrating a desired function of print head acceleration versus time. The print head motor control preferably also includes a velocity loop subtracting a print head velocity estimated from the measured print head position from the sum. The print head motor control is preferably implemented using a microprocessor.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: April 29, 2003
    Assignee: Texas Instruments Incorporated
    Inventors: Charles P. Cole, Stephen J. Fedigan
  • Patent number: 6485207
    Abstract: A printer assembly includes an idler pulley, a printhead carrier belt, an idler-pulley spring, and a ratchet stop. The printhead carrier belt is operatively connected to the idler pulley and extends in an inboard direction from the idler pulley. The idler-pulley spring biases the idler pulley in an outboard direction to maintain belt tension as the belt lengthens during wear. The ratchet stop is located inboard of the idler pulley and operatively engages the idler pulley against movement of the idler pulley in the inboard direction, wherein such inboard movement would cause printing errors.
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: November 26, 2002
    Inventors: Eugene David Allen, Sung Hwan Song, Ryan Timothy Ward
  • Patent number: 6431775
    Abstract: An automatic alignment system is used to correct the offset error of a bidirectional printing device. The positional offset between the forward printing and the backward printing is compensated by adjusting the position of the printing cartridge. The actual position of the cartridge is sensed by a light detector, which is shuttered when the moving cartridge, driven by a microstepping motor, passes through the sensor. Based on the difference between the actual position and the correct theoretical position, the cartridge position is automatically adjusted to correct the offset error. For fine adjustment, time delay can be used in addition to the positional adjustment of the cartridge.
    Type: Grant
    Filed: June 3, 1996
    Date of Patent: August 13, 2002
    Assignee: Industrial Technology Research Institute
    Inventors: Ruei-Lon Huang, Shu Cheng Hsieh
  • Patent number: 6283651
    Abstract: The invention relates to an arrangement for mounting a print head in a printer. The arrangement comprises a frame (1) to which a feeder device feeds a material to be printed which the printer will print on by means of a print head (3), movably arranged adjacent to a print roll (2) for being brought into, or out of, contact with the material to be printed. According to the invention, the arrangement uses a magnet (5) to hold the print head. Preferably, the print head is fitted in a fixture device (4), which is pivoting freely around a rear axle (7) parallel to the print roll, and the pressure is applied on the print head by a pressure member (6). The magnet (5) is preferably attached to the pressure member (6) so as to transfer pushing as well as pulling forces. The invention enables screws or fixed mounting of the print head to be avoided. The arrangement according to the invention also allows for the print head (3) pressure point to be transversally displaced.
    Type: Grant
    Filed: October 26, 1999
    Date of Patent: September 4, 2001
    Assignee: Intermec IP Corp
    Inventor: Robert Holmberg
  • Patent number: 6264384
    Abstract: Disclosed is a multi-functional apparatus having a small size. The multi-functional apparatus according to the present invention includes a body including a section for transferring a recordable paper and a service station formed at an outside of the recordable paper transferring section; a guide mounted along an entire width of the body in a vertical direction to be normal to a recordable paper transferring direction; and a carriage which has a printhead and a scanner module mounted thereon and moves reciprocally along the guide to be across the recordable paper transferring section, the carriage being positioned in the service station when a scanning or printing operation is normally completed, wherein the scanner module is mounted on the carriage to be adjacent to the recordable paper transferring section with reference to the printhead.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: July 24, 2001
    Assignee: SamSung Electronics Co., Ltd.
    Inventors: Hyun-Jun Lee, Seong-Woo Kim
  • Patent number: 6239517
    Abstract: A linear shuttle motor assembly used for reciprocally moving a printer head includes a rotor and a stator having the same mass. A loud, i.e., the printer head, is connected to the stator and a counter balance to the rotor. The rotor and the stator are driven to reciprocally move in mutually opposite directions. A 180 degree phase synchronizing mechanism is used to synchronize phases of the rotor and the stator. The mechanism is fixed to a housing and connected to the rotor and the stator. By this configuration, the amount of power transmission loss is reduced to a minimum, which improves energy conversion efficiency.
    Type: Grant
    Filed: February 22, 2000
    Date of Patent: May 29, 2001
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Takashi Nakamura, Toshio Hiki
  • Patent number: 6054835
    Abstract: A method and apparatus for operating stepping motors in a printer or copier senses temporarily changes in the moment of resistance caused by the introduction of the leading edge of the paper and overcomes this change in moment by changing the current amplitude to the motor windings. The currents are modified at a starting time, as determined by sensors.
    Type: Grant
    Filed: July 1, 1999
    Date of Patent: April 25, 2000
    Assignee: Oce Printing Systems GmbH
    Inventors: Peter Thiemann, Jens Umlauf, Hermann Andresen
  • Patent number: 5998956
    Abstract: 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 stepping motor is presumed.
    Type: Grant
    Filed: October 2, 1997
    Date of Patent: December 7, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hiroyuki Saito
  • Patent number: 5918991
    Abstract: 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 calculation command, the printing apparatus calculates and stores a conversion coefficient for converting the minimum physical pitch values of the printer mechanism to virtual base pitch values. Thereafter, the printing apparatus executes motion commands and directs relative motion of the head and/or selected recording medium transport in accordance with this virtual pitch value.
    Type: Grant
    Filed: March 12, 1997
    Date of Patent: July 6, 1999
    Assignee: Seiko Epson Corporation
    Inventor: Tomomi Miyasaka
  • Patent number: 5915861
    Abstract: 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 one of the phases of the motor, while the level of the other phase changes sign. During a motor stopping command, second pulses (VCA,VCB) are applied to the registers and to the two phases of the motor and are programmed so as to ensure, during the last microstep, an exact stopping position, such that all the stopping positions are kept apart by a whole number of half steps. Very precise, fast and noise-free printing is thus attained. The resolution is doubled, without any loss of precision or speed.
    Type: Grant
    Filed: October 7, 1997
    Date of Patent: June 29, 1999
    Assignee: Olivetti-Canon Industriale S.p.A.
    Inventors: Thomas Wegmann, Jean-Luc Passello
  • Patent number: 5871291
    Abstract: 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 the carriage. Furthermore, the recording apparatus includes: a control device for driving the carriage by the driving device in accordance with a driving process of: an acceleration step for accelerating the carriage by stepwise changing the carriage's velocity from a rest level to a predetermined level and a retaining step for keeping the carriage's velocity of the predetermined level as a predetermined velocity.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: February 16, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kenji Kawazoe
  • Patent number: 5861726
    Abstract: 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 recovery system is differentiated from that for the recording.
    Type: Grant
    Filed: October 7, 1996
    Date of Patent: January 19, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshio Uchikata, Koh Hasegawa, Toshihide Wada, Tadashi Hanabusa
  • Patent number: 5857787
    Abstract: 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 current in the coils has at least partially decayed. The current in the coils is allowed to decay further after negatively driving the coil. The motor coils are connected to an H bridge having transistors which can be formed in a full H bridge or half bridge. A controller switches the transistors to cause negative and positive flow through the H bridge for positive current flow from a reference level to an upper reference level, and a decay of current within the coils to an intermediate reference. The coils are then driven with a negative current from the intermediate reference level to a second intermediate reference level afterwhich the current within the coils decays to a lower or initial reference level.
    Type: Grant
    Filed: September 11, 1996
    Date of Patent: January 12, 1999
    Assignee: Prinntronix, Inc.
    Inventor: Robert P. Ryan
  • Patent number: 5842795
    Abstract: A printer including a driving shaft having first, second and third worms for feeding a recording paper, advancing a printing ribbon, and moving a carriage, respectively. The third worm for moving the carriage may be replaced by a belt. The driving shaft may include two separate portions, with the first, second and third worms connected to ends of the separate portions. The driving shaft may be rotatably supported adjacent the first, second and third worms.
    Type: Grant
    Filed: March 12, 1997
    Date of Patent: December 1, 1998
    Assignee: Seiko Epson Corporation
    Inventors: Hiroshi Narita, Noboru Otsuki
  • Patent number: 5832820
    Abstract: A dot matrix printer having a plurality of hammers on a hammerbank with a counterbalance for the hammerbank in adjacent parallel relationship to the hammerbank. The hammerbank and counterbalance are driven by a first crank arm connected to the hammerbank and a second crank arm connected to the counterbalance with looped circular portions having bearing surfaces for moving the crank arms in opposite relationship to each other. A single shaft with two eccentrics, each respectively in the bearing surfaces turns the two crank arms. The crank arms are in close parallel relationship to each other and close proximity to the hammerbank and counterbalance. The single shaft is connected to a motor for driving the hammerbank and counterbalance, and is formed with a stator having coils with a magnetic ring formed as a rotor portion surrounding the stator, and a flywheel surrounding and connected to the magnetic rotor ring.
    Type: Grant
    Filed: August 4, 1997
    Date of Patent: November 10, 1998
    Assignee: Printronix, Inc.
    Inventor: Gordon Brent Barrus
  • Patent number: 5702190
    Abstract: A dot-matrix line printer includes a printing shuttle which moves reciprocally to carry out a printing operation, and a balancing shuttle which moves in a direction opposite to the direction of the movement of the printing shuttle. The balancing shuttle is partly inserted in the printing shuttle so as not to interfere with the latter upon printing and so that the center of gravity of the balancing shuttle is located as close to the center of gravity of the printing shuttle as possible.
    Type: Grant
    Filed: July 22, 1996
    Date of Patent: December 30, 1997
    Assignee: Fujitsu Limited
    Inventors: Osamu Shimizu, Kazuya Harada, Shinichi Wada, Tetsuya Fujimoto, Takanari Inui
  • Patent number: 5644348
    Abstract: An ink jet recording apparatus for recording onto a recording medium by discharging ink includes a recorder for recording on the recording medium by discharging the ink through discharge ports, a setting device for setting a line recording mode in which recording is performed for every line or a page recording mode in which the recording is performed over a plurality of lines, with the recorder, and a controller, which, when the line recording mode is set, moves the discharging port face of the recorder outside of a conveyance passage for the recording medium for every termination of recording of one line, and which, when the page recording mode is set, reciprocates the recorder in the conveyance passage to record over a predetermined area, and after termination of recording of the predetermined area, moves the discharging port face of the recorder outside of the conveyance passage, and then conveys the recording medium for discharge from the apparatus.
    Type: Grant
    Filed: January 30, 1996
    Date of Patent: July 1, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Noboru Shimoyama, Masanori Kaneko
  • Patent number: 5642949
    Abstract: The printing apparatus or the sheet feeding apparatus disclosed here which employs vibration driven actuators as driving sources has a circuit for detecting the characteristics of the actuator during preparatory operation performed previous to the regular operation. Information detected by said circuit is used to control the actuators during the regular operation. As a result, a printing apparatus or a sheet feeding apparatus capable of reducing wasteful or unnecessary operation can be obtained.
    Type: Grant
    Filed: August 2, 1995
    Date of Patent: July 1, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventor: Shinji Yamamoto
  • Patent number: 5628572
    Abstract: The present invention is directed to realize a portable, compact, light, thin, inexpensive and fast printer apparatus. A motor is provided between a printing head unit and a stationary frame member to drive the printing head unit relative to the stationary frame member in leftward and rightward directions, thereby eliminating conventional indirect driving components such as a stepping motor and a lead screw. Further, a sensor is provided in the printing head unit to detect a moving velocity and a position of the printing head unit to thereby construct the printer apparatus having reduced number of components to ensure stable driving and high accuracy. According to such a construction, the motor is integrated into the printing head unit, which self-moves in the printer apparatus to eliminate a mechanism converting a rotational movement into a linear movement, thereby achieving cost down of the printing apparatus.
    Type: Grant
    Filed: May 9, 1994
    Date of Patent: May 13, 1997
    Assignee: Seiko Instruments Inc.
    Inventors: Katsuari Sato, Minoru Hoshino, Shinji Nureki, Shinichi Hayashizaki, Ko Yamazaki, Akihiro Iino
  • Patent number: 5605407
    Abstract: A printer is provided comprising a carriage on which recording head is mounted. Drive mechanisms for moving carriage in reciprocating motions an encoder having openings provided contiguously in the circumferential direction at fixed intervals, attached thereto, and which rotates as carriage moves. A position detector is provided in proximity to the encoder for detecting the encoder's detection-target unit and generates timing pulses in response thereto. A shielding plate is attached to carriage for blocking the encoder from the position detector at the home position. A processor detects the home position for carriage based upon a timing pulse pause time.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: February 25, 1997
    Assignee: Seiko Epson Corporation
    Inventors: Susumu Hama, Hiroshi Takizawa, Toshiaki Watanabe, Masahiro Kamijo, Manabu Shimizu
  • Patent number: 5595448
    Abstract: The present invention provides a carriage shifting apparatus comprising a drive source, a suspension member suspended to transmit a driving force of the drive source, a carriage connected to the suspension member and reciprocally shiftable by the driving force of the drive source, a tension applying means for applying a tension force to the suspension member, and a weight body attached to the tension applying means via a viscoelastic member.
    Type: Grant
    Filed: July 5, 1995
    Date of Patent: January 21, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventor: Toshiaki Harada
  • Patent number: 5588758
    Abstract: The printing apparatus or the sheet feeding apparatus disclosed here which employs vibration driven actuators as driving sources has a circuit for detecting the characteristics of the actuator during preparatory operation performed previous to the regular operation. Information detected by said circuit is used to control the actuators during the regular operation. As a result, a printing apparatus or a sheet feeding apparatus capable of reducing wasteful or unnecessary operation can be obtained.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 31, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventor: Shinji Yamamoto
  • Patent number: 5588757
    Abstract: A recording apparatus for performing recording uses a carriage mounted with a recording head moving along a guide shaft. The recording apparatus includes a magnetic linear encoder consisting of a scale element magnetized and a detection unit for detecting magnetized information magnetized to the scale element. Provided also are clicks formed on any one of the detection unit and the carriage and click engaging portions formed in the other one of the detection unit and the carriage. The clicks engage with the click engaging portions, whereby the detection unit is snap-locked to the carriage. This enables the detection unit of the magnetic linear encoder to be readily attached to the carriage and besides, when attached, prevents disorder of the information magnetized to the scale element. Further, even when a position of the carriage shifts corresponding to sheets having different thicknesses, a sliding load of the carriage does not change.
    Type: Grant
    Filed: March 20, 1996
    Date of Patent: December 31, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuhiro Unosawa, Shinji Kanemitsu, Makoto Kashimura, Makoto Takemura, Shoji Kikuchi, Shinya Matsui, Toshiyuki Onishi, Tetsuhiro Nitta, Masaru Sato, Hisashi Morioka
  • Patent number: 5571284
    Abstract: To effectively cool a linear motor used in a shuttle mechanism of a printer and also to increase magnetic flux density used in generating thrust in the linear motor, each magnet used in the linear motor is beveled to form chamfers at corners that confront a coil member and that contact corners of adjacent magnets.
    Type: Grant
    Filed: June 23, 1995
    Date of Patent: November 5, 1996
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Genichiro Kawamichi, Satoru Tobita, Shun Suzuki
  • Patent number: 5560723
    Abstract: A shuttle mechanism of a printer apparatus wherein a balance shuttle unit is arranged on the opposite side of the print head in a print shuttle unit, for instance, on the under side of said print shuttle unit, so that the center of the gravity of the print shuttle unit is made to become close to that of the balance shuttle unit. Common components such as the magnet, yoke, guide member may be employed in both the shuttle units.
    Type: Grant
    Filed: May 17, 1994
    Date of Patent: October 1, 1996
    Assignee: Fujitsu Limited
    Inventor: Atsuhisa Kobayashi
  • Patent number: 5547295
    Abstract: 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. Subsequently, the carriage driving motor is driven at a constant speed. Thus, the vibration of the carriage is minimized and movement of the carriage at the constant speed is stabilized.
    Type: Grant
    Filed: January 20, 1995
    Date of Patent: August 20, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventor: Shinji Kanemitsu
  • Patent number: 5547296
    Abstract: A method of controlling a transportation velocity of a printhead carriage of a serial printer is disclosed. The printhead carriage is driven by a motor via a timing belt. First, a characteristic equation, which includes a motor speed, a current applied to said motor, an equivalent disturbance indicating environmental variations affecting said motor speed, is discreted. Thereafter, the equivalent disturbance is estimated using the characteristic equation which has been discreted. A value of the equivalent disturbance is determined and subsequently, a value of the equivalent disturbance compensating level is calculated using a discrete low pass filter. Finally, a current to be applied to said motor is obtained by adding a compensating level of the controller to the level of the equivalent disturbance.
    Type: Grant
    Filed: May 24, 1994
    Date of Patent: August 20, 1996
    Assignee: NEC Corporation
    Inventor: Naotoshi Iwazawa
  • Patent number: 5544964
    Abstract: Disclosed is a shuttle mechanism of a dot line printer including a printing shuttle unit making a reciprocating motion to perform dot printing and a balance shuttle unit making a motion in a direction opposite to the kinetic motion of the printing shuttle unit. This shuttle mechanism is constructed of a linear motor in which a movable unit for the reciprocating motion and a magnetic circuit are separated. With this construction, the movable unit can be decreased in weight. Therefore, the high-speed reciprocating motion can be made, and high-speed printing is thereby attainable. The balance shuttle unit is disposed under the printing shuttle unit. The apparatus can be thereby made compact.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: August 13, 1996
    Assignee: Fujitsu Limited
    Inventors: Yuichi Yoshida, Hitoshi Moriyama
  • Patent number: 5529411
    Abstract: Disclosed is a carriage driving device in which a rack 8 with high rigidity and gear teeth 8a at one side elongated therethrough is fixed on a bottom frame 7c in a frame 7 of a printer 1 so that the rack 8 is arranged parallel with a platen 5, and both a pinion 16 meshed with the gear teeth 8a of the rack 8 and a driving motor 15 for rotating the pinion 16 are arranged on a plate 18 which is rotatably supported around a support shaft 17 in a horizontal direction on the carriage 2. The pinion 16 is biased by a spring 22 so as to constantly mesh with the gear teeth 8a of the rack 8. In the carriage 2, a first contact member 10 slidably contacting on the upper surface of the rack 8 and a second contact member 11 slidably contacting to the side of the rack 8 opposite to the side where the gear teeth 8a are formed, are arranged so that a predetermined positional relationship of the carriage 2 against the platen 5 is maintained.
    Type: Grant
    Filed: December 9, 1994
    Date of Patent: June 25, 1996
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Takashi Nakata
  • Patent number: 5484216
    Abstract: A planar auxiliary supporting member for supporting an elastic member for generating a vibration is arranged. The elastic member contacts a rail-shaped stationary member, and moves along the stationary member. The rigidity of the supporting member is set to be low, so that the elastic member as a stator stably moves along the stationary member.
    Type: Grant
    Filed: December 1, 1995
    Date of Patent: January 16, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Kimura, Yoshifumi Nishimoto, Hideki Tanaka, Hiroyuki Seki, Toshiaki Harada, Yoshitaka Okamura, Shinji Yamamoto
  • Patent number: 5482388
    Abstract: A recording apparatus having a paper feeding device for feeding a printing sheet, a detent mechanism capable of engaging the feed roller so as to determine the feeding pitch at which the paper feeding device feeds the sheet, a ribbon feeding mechanism for feeding an ink ribbon, a driving power source for generating a driving force, a transmission mechanism for transmitting a driving force from the driving power source to one of the paper feeding device and the ribbon feeding mechanism to operate the paper feeding device or the ribbon feeding mechanism, and a changeover mechanism for changing over the transmission effected by the transmission mechanism and also changing over the engagement between the detent mechanism and the paper feeding device in a linked relationship with the changeover of the transmission of the driving force.
    Type: Grant
    Filed: December 2, 1994
    Date of Patent: January 9, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tsutomu Harada
  • Patent number: 5478164
    Abstract: 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 the printer is locked. This makes it possible to easily restart the DC motor.
    Type: Grant
    Filed: January 7, 1994
    Date of Patent: December 26, 1995
    Assignee: Alps Electric Co., Ltd.
    Inventor: Masahiko Mori
  • Patent number: 5450106
    Abstract: In a recording apparatus employing a magnetic linear encoder that includes a magnetized scale and a magnetic head movable along the scale, in order to enable efficient mounting of the scale on the recording apparatus and to enable tension adjustment of the scale, support members are provided for detachably supporting the scale, as is a device for providing tension during the mounting of the scale on side plates of the recording apparatus. Also, the magnetized portion of the scale is positioned behind the carriage. Further, the magnetic head is provided with dust shield members which are in contact with, but rendered slidable with respect to, the scale.
    Type: Grant
    Filed: April 8, 1993
    Date of Patent: September 12, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hisashi Morioka, Shigemitsu Tasaki, Shigeo Takenaka, Makoto Kashimura, Nobuaki Iwakami, Masafumi Wataya, Toshiyuki Onishi, Yoshiaki Kaburagi, Hajime Yoshida, Yuichi Hirai
  • Patent number: 5445461
    Abstract: A carriage, preferably carrying a knife for cutting a moving web for attachment of the cut web end to a web winding roll, is driven on a supporting rail along a linear path by means of a driving motor operating a toothed driving belt. The belt is detachably clamped to the carriage by a clamp fixed on the carriage and formed by a support plate having a belt supporting surface thereon and a pressure plate provided with teeth for mating engagement with the belt teeth mounted on the support plate in opposed relation to the support plate surface to define with the surface a slot for reception of the belt. The pressure plate is slidably supported for movement toward and away from the surface and is spring-biased to normally clamp the belt therebetween.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: August 29, 1995
    Inventors: Jozef De Roeck, Eduard V. Vaeck, Marc Sillis, Michel Marckx, Paul Van Hecke
  • Patent number: 5433541
    Abstract: A carriage motor control device that uses speed determination means (3) for determining a set speed value (SN12) to be set on the basis of an aimed angle value (SN13A) indicative of an aimed rotation angle, an aimed speed value (SN13B) indicative of an aimed rotation speed and the rotation angle value, speed control means (4) for generating a speed control value (SN7) for making the rotation speed value closer to the set speed value on the basis of a difference between the rotation speed value and the set speed value, angle control means (5) for generating an angle control value (SN8) for making the rotation angle value closer to the aimed angle value on the basis of a difference between the aimed angle value and the rotation angle value, selection means (8) for selecting the speed control value as a motor drive control value when the rotation speed value is larger than a first speed value and selecting the angle control value as the motor drive control value when the rotation speed value is smaller than the
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: July 18, 1995
    Assignee: NEC Corporation
    Inventors: Tomoharu Hieda, Sunao Ishizaki
  • Patent number: 5434602
    Abstract: A recording apparatus, which is provided with a carriage supporting a recording head or reciprocating along a platen, includes a magnetized scale of a magnetic linear encoder positioned along a moving direction of the carriage, and a magnetic head of the magnetic linear encoder, mounted on the carriage and adapted for reading the magnetized pattern of the scale. The scale is provided with at least two magnetized lines of mutually different pitches of magnetization, for recording position information relating to the recording operation, and position information relating to other functions.
    Type: Grant
    Filed: April 21, 1993
    Date of Patent: July 18, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshiaki Kaburagi, Shigemitsu Tasaki, Shigeo Takenaka, Makoto Kashimura, Nobuaki Iwakami, Shinya Matsui, Masafumi Wataya, Toshiyuki Onishi, Yasuhiro Unosawa, Hajime Yoshida, Yuichi Hirai
  • Patent number: 5431502
    Abstract: 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 measuring device for measuring characteristics of the carriage motor on the basis of the detected position and speed; storage for storing the measured characteristics; a first controller for controlling the drive mechanism and causing the carriage to travel for the purposed of taking the necessary measurements, the measurements being taken after a power switch has been turned on, after a sheet has been fed, or after a predetermined time has elapsed; and a second controller for controlling the drive mechanism upon reception of a print command on the basis of the print command and the stored characteristics to thereby cause the carriage to travel for printing.
    Type: Grant
    Filed: June 15, 1993
    Date of Patent: July 11, 1995
    Assignee: Seiko Epson Corporation
    Inventors: Yasunori Orii, Hirotomo Tanaka
  • Patent number: 5427461
    Abstract: A serial printer for recording with a recording head while synchronizing with a movement of a carriage reciprocated on an apparatus body and on which the recording head is mounted. A position of a linear encoder is detected by a detecting portion. A detecting signal from this detecting portion is compared with a reference voltage, and a pulse output as a synchronous signal is generated. A duty of this pulse output is adjusted to obtain a well-recorded result.
    Type: Grant
    Filed: August 30, 1993
    Date of Patent: June 27, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuichi Hirai, Masashi Kamada, Masashi Matsumoto, Noriyuki Suzuki
  • Patent number: 5411340
    Abstract: The encoder scale has features to be automatically read by a single-channel sensor of the device to determine position of a carriage that is part of the device and moves bidirectionally across the sheet. These features include a first group of many graduations formed in a single row along the substrate; and a second group of many graduations also formed in the same row along the substrate and interspersed among those of the first group over at least a distance that corresponds approximately to the full transverse dimension of the sheet. The scale also includes some provision for automatically distinguishing --by the single-channel sensor of the image-related device--between graduations of the first and second groups. This provision includes, for each graduation of the second group, some feature (such as width) that is distinctive in relation to the graduations of the first group.
    Type: Grant
    Filed: September 17, 1993
    Date of Patent: May 2, 1995
    Assignee: Hewlett-Packard Company
    Inventor: Steven B. Elgee
  • Patent number: 5401109
    Abstract: A mounting bed integral with a hammer bank is disposed parallel to a counter balancer composed of a counter balancer constituting member and a yoke. The mounting bed and the yoke are provided with solenoid coils opposed to a permanent magnet provided on the frame, and a pair of bearings are arranged between the mounting bed and the counter balancer constituting member. A position sensor for the mounting bed and the counter balancer is provided. A controller is provided to control a current and direction of the solenoid coil by a detection signal from the position sensor. The mounting bed integral with the hammer bank and the counter balancer are shuttle-operated in opposite directions by the controller.
    Type: Grant
    Filed: February 24, 1994
    Date of Patent: March 28, 1995
    Assignees: Kabushiki Kaisha Yasakawa Denki, Ye Data, Inc.
    Inventors: Juichi Tatsumi, Manabu Muto, Kenji Mori, Hajime Hayase
  • Patent number: 5372440
    Abstract: A printing machine wherein printing onto a substrate is effected by a first movement of a print head (1) downwardly into contact with the substrate and then by a second movement over the surface of the substrate while thermal printing elements within the print head (1) are selectively energized. The first movement is controlled by downward movement of a pair of rollers (6,7) operated by synchronized angular movement of a pair of eccentric shafts (8,9) one of which is freely mounted within each roller (6,7). The first and second movements are driven by a first and second stepper motor respectively. The rollers may be coupled by drive belts (4,5).
    Type: Grant
    Filed: February 16, 1993
    Date of Patent: December 13, 1994
    Assignee: ITW Limited
    Inventor: David G. Slater
  • Patent number: 5365839
    Abstract: A shuttle printer having a print shuttle unit capable of reciprocating with a print head mounted thereon, and a balance shuttle unit capable of reciprocating to generate counterforce to momentum of the print shuttle unit. The shuttle printer includes a device for driving the print shuttle unit to reciprocate, and a device for driving the balance shuttle unit to reciprocate. The shuttle printer further includes a device for detecting the position of the print shuttle unit, and a device for synchronously controlling the two driving devices in response to a result of detection by the print shuttle unit position detecting device.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: November 22, 1994
    Assignee: Fujitsu Limited
    Inventors: Satoshi Yoshino, Keiko Nojiri