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| Number | Title | Issue Date |
| 7645082 | Dot head and method of manufacturing armature structure for dot head According to a dot head of the invention, an armature structure for moving a printing needle forward and backward has the efficiency that the magnetic characteristics is excellent and mechanical intensity is high. The armature structure is manufactured in a manner t... | 01/12/2010 |
| 7585124 | Armature structure and dot head An armature structure according to the present invention is arranged in a manner that two armature members, in each of which a shear plane and a broken-out section are formed by a punching processing on an inner periphery of a through hole into which a fulcrum shaft... | 09/08/2009 |
| 7461986 | Wire dot printer In order to realize a stable rocking operation of the armature for performing high-speed printing, between the armature spacer for accommodating and holding the support shaft of the armature which supports the printing wires, and the yoke for holding the support sha... | 12/09/2008 |
| 7413358 | Armature damper, method of manufacturing armature damper, and dot head An armature damper according to the present invention acts to abut against the arm of an armature to stop the arm at a predetermined backward position. The armature damper is formed in a manner that the surface thereof abutting against the arm is formed by a rigid b... | 08/19/2008 |
| 7374354 | Armature, wire dot printer head and wire dot printer In order to realize a weight saving and prevent a concentration of stress to thereby obtain durability endurable for high-speed printing, an armature of the present invention has an arm that is formed into a long-sized plate-like shape and holds a printing wire at i... | 05/20/2008 |
| 7331726 | Armature, wire dot printer head and wire dot printer In order to obtain joining force endurable for high-speed printing and realize an enhancement in magnetic characteristic, a plate-like arm for supporting a printing wire is laminated with a magnetic circuit forming member that is composed by laminating plural plates... | 02/19/2008 |
| 7329059 | Wire dot printer head and wire dot printer A wire dot printer head of the present invention has an armature that has an arm supporting a printing wire and pivotably provided at the position opposite to the core, and a coil spring that one end comes in contact with the arm for urging the armature in the direc... | 02/12/2008 |
| 7314323 | Wire dot printer head and wire dot printer A wire dot printer head which has an armature spacer having plural notches accommodating support shafts of plural armatures respectively supporting a printing wire, and an abrasion preventive member provided between the armature spacer and a yoke holding the support... | 01/01/2008 |
| 7278794 | Wire dot printer head and wire dot printer In order to realize a stabilized pivotal movement of an armature to thereby obtain pivotal force required for high-speed printing, a pivot shaft is held such that an armature having an attracted face that is in contact with a core, that has a coil wound therearound ... | 10/09/2007 |
| 7258499 | Wire dot printer head and wire dot printer A wire dot printer head which has an armature spacer having plural notches accommodating support shafts of plural armatures respectively supporting a printing wire, and an abrasion preventive member provided between the armature spacer and a yoke holding the support... | 08/21/2007 |
| 7246960 | Print head A needle guide (5) is composed of a first guide wall (5a) and a second guide wall (5b) arranged at a distance x from each other. Each of these guide walls is formed with through holes through which needles penetrate and which exten... | 07/24/2007 |
| 7172351 | Method for manufacturing an armature An armature manufacturing method of forming an armature including an arm holding a printing wire, and magnetic circuit forming members attached to the arm places the magnetic circuit forming members on the arm with a resistive layer of a resistive material having hi... | 02/06/2007 |
| 7048455 | Wire dot printer head with abrasion having magnetic permeability and hardness surface In order to realize a stable rocking operation of the armature for performing high-speed printing, between the armature spacer for accommodating and holding the support shaft of the armature which supports the printing wires, and the yoke for holding the support sha... | 05/23/2006 |
| 7018116 | Armature, wire dot printer head and wire dot printer In order to enhance magnetic characteristic to realize a stabilized pivotal movement of an armature and to obtain magnetic characteristic required for high-speed printing, an armature according to the present invention has a magnetic circuit forming member formed by... | 03/28/2006 |
| 7008126 | Wire dot printer head and wire dot printer In the wire dot printer head and wire dot printer of the present invention, a plurality of armatures are rockably mounted in positions corresponding to a plurality of cores. On the end face on the core side of a wire, a plurality of receiving members are provided. A... | 03/07/2006 |
| 6994482 | Wire dot printer head and wire dot printer In order to restrain a flux loss for obtaining magnetic characteristic required for high-speed printing, a wire dot printer head has armature 4 having a pivot shaft serving as a center of a pivot and pivotably provided so as to oppose to plural cores formed o... | 02/07/2006 |
| 6872016 | Impact dot print head and a printer including the same In an impact dot print head there is provided a fitting structure for fitting an inner periphery-side cylindrical portion of a yoke and an inner periphery-side ring-shaped portion of an armature spacer with each other so that the inner periphery-side cylindrical por... | 03/29/2005 |
| 6848843 | Wire dot printer head and wire dot printer A wire dot printer head of the present invention is configured by being provided with an abrasion preventive member which surrounds an outer circumference of support shafts of a plurality of armatures, between an armature spacer having a plurality of cutouts for res... | 02/01/2005 |
| 6821035 | Line printer with staggered magnetics An impact printer with a hammerbank having print hammers retained by a permanent magnet for impacting a print ribbon, and a mechanical driver for moving the hammerbank across print media. First and second coils for each hammer are wrapped around first and second pol... | 11/23/2004 |
| 6805503 | Wire dot printer head and wire dot printer A wire dot printer head of the present invention is provided with an abrasion preventive member in a yoke. The abrasion preventive member encloses the outer periphery of the armature support shafts. The yoke, together with an armature spacer having a plurality of cu... | 10/19/2004 |
| 6776545 | Impact dot print head and a printer including the same In the impact dot print head of the present invention there is used an armature spacer having side yoke portions which extend away from cores of a yoke and confront armatures. With such an armature spacer, when a magnetic circuit is formed by a magnetic flux generat... | 08/17/2004 |
| 6729782 | Wire dot printer head In the wire dot printer head of the present invention, there is provided an armature stopper against which an armature having pivoted from a printing position to a stand-by position comes into abutment, the armature stopper being formed by bonding an elastic plate a... | 05/04/2004 |
| 6698956 | Wire dot printer head In the wire dot printer head of the present invention, an armature adapted to move pivotally between a printing position and a stand-by position is provided with a pivot shaft serving as a fulcrum, and the pivot shaft is pinched and supported by a pair of... | 03/02/2004 |
| 5975776 | Dot matrix print head with unitary armature assembly and method of operation thereof A print head is disclosed which includes a unitary armature assembly including a thin resilient spring, thick structural members and cores upon which a magnetic flux path can be electrically imposed, such that motion of the armatures is constrained to onl... | 11/02/1999 |
| 5454649 | Wire printhead with armature biasing mechanism A wire printhead comprising a plurality of electromagnets and a corresponding plurality of armatures, each provided with an actuator arm forming, with the juxtaposed armature to an electromagnet, a lever of first order for actuating an impression wire att... | 10/03/1995 |
| 5447381 | Piezoelectric printing head A piezoelectric printing head includes an annular base frame and a plurality of piezoelectric actuator assemblies mounted on the base frame. Each actuator assembly includes a piezoelectric element having one end rigidly secured to the base frame and anoth... | 09/05/1995 |
| 5335999 | Printer hammerspring The specification sets forth a hammerspring for a dot matrix printer having a plurality of such hammersprings spaced along a hammerbank with permanent magnetics to draw said hammersprings into a retracted and uniformly stressed mode through a spring porti... | 08/09/1994 |
| 5290112 | Matrix print head, in particular serial matrix pin print head A matrix pin print head with a print pin guide casing (7) and a print pin drive casing (9) comprises an electromagnetic drive (12). The electromagnetic drive (12) comprises a magnet yoke (13) with an electromagnetic coil (14) disposed on a magnet yoke arm... | 03/01/1994 |
| 5281037 | Wire dot print head and method for manufacturing same An improved wire dot print head for increased integrated density is provided. The wire dot print head includes a frame. A plurality of drive coils are mounted within the frame. A lever for driving print wires has a print wire mounted at one end and its ot... | 01/25/1994 |
| 5269610 | Armature design in a wire matrix printing head An impact wire-dot printing head comprising a frame (4, 15, 32); impact dot printing mechanisms, each comprising an armature (1) having an outer end pivotably supported by the frame means, an electric magnet for attracting the armature (1) an impact dot-w... | 12/14/1993 |
| 5263782 | Print hammer arrangement in dot line printer minimizing number of hammers simultaneously fired A dot line printer has a plurality of print hammers accommodated in a hammer bank, which make dot impressions on a sheet of print paper as the hammer bank reciprocally moves in a print line direction perpendicular to the direction in which the sheet of pr... | 11/23/1993 |
| 5261753 | Print head for dot matrix printers A print head for use in dot matrix printers for producing characters and symbols formed from dots. The print head is composed of a plurality of stylus actuator assemblies arranged one after the other in two interlocking rows and with all the styli level w... | 11/16/1993 |
| 5257868 | Printer head for printer In a printing head for a printer, forward end surfaces of respective outer and inner peripheral walls of a solenoid base and forward end faces of a plurality of respective core sections arranged between the inner and outer peripheral walls along a periphe... | 11/02/1993 |
| 5215389 | Print head for a dot matrix printer A print head for a dot matrix printer has a head body, a plurality of print needles slidably mounted in the head body, a plurality of armatures, each corresponding to the print needle, an electromagnet provided on the head body for attracting a correspond... | 06/01/1993 |
| 5209585 | Print head for a dot matrix printer A print head for a dot matrix printer has a plurality of print needles slidably mounted in the head, a plurality of armatures operatively connected to the print needles, a plurality of electromagnets for respectively operating the armatures, a center ring... | 05/11/1993 |
| 5205659 | Print head with lubricator A matrix print head comprises several armature device groups which, in each case, comprise a magnet yoke (9) with an electromagnetic coil (10), disposed on one of the magnet yoke arms (9a), and an armature (8), which armature serves as a drive for a print... | 04/27/1993 |
| 5188466 | Matrix pin print head with rebound control The invention relates to a matrix print head (1) which is set at a fixed distance to a substrate support (2), where a recording substrate (3) is supported on the substrate support (2). An ink ribbon (4) is led between print pins (5) of a matrix pin print ... | 02/23/1993 |
| 5186552 | Dot matrix print head A dot matrix print head wherein each printing device comprises a pin fitted to one end of the anchor of a respective electromagnet. The electromagnet presents an E-shaped core, the center bar of which forms a first pole piece, and the other two bars of wh... | 02/16/1993 |
| 5074687 | Armature of an electromagnet-coil/armature system for dot matrix print heads, and method of manufacturing same In a method for the manufacture of armatures from sheet-metal parts stacked in the manner of laminated inductors, predeterminately shaped openings or indentations (6) and corresponding coaxially opposite projections (8) are defined in and during the forma... | 12/24/1991 |
| 5054942 | Wire printing head with unitary return group A needle or wire printing head comprises a plurality of electromagnets with fixed cores, each with two limbs, which are mounted in a ring within a containment body. Movable armatures are disposed in a radiating array in front of coplanar terminal surfaces... | 10/08/1991 |
