Abstract: Some embodiments of the disclosure provide a flatness detection device. In an embodiment, the flatness detection device includes a back plate, an electromagnet, a cross beam, a probe, and a limiting frame. The limiting frame and the electromagnet are provided side by side on the back plate. The cross beam is located above the limiting frame and the electromagnet. The probe vertically penetrates the cross beam and the limiting frame. A spring is provided between the cross beam and the electromagnet. The spring is movable in a vertical direction by a guide, the movement being at least one of compression and extension.

Abstract: A dot impact printer including a printhead unit having a wire dot head that strikes an ink ribbon against a recording medium to print, and a head support frame that supports the wire dot head; a path forming member that forms the recording medium conveyance path at the printing position of the wire dot head; and a first contact group having at least three contact points disposed to the head support frame that contact the path forming member proximally to the wire dot head for positioning to the path forming member in the head pin projection direction.

Abstract: 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 that an arm member, which is formed by subjecting a plate-shaped material excellent in abrasion resistance performance and having a high intensity to a plating processing using born etc., is sandwiched at a portion thereof from both sides in a stacked manner by two armature members each of which is formed by subjecting a plate-shaped material excellent in magnetic characteristics to a plating processing using born etc. A pin formed by subjecting a piano wire to a plating processing using boron etc. is inserted with a small pressure into common through holes of the two armature members and the arm member thus stacked thereby to provisionally assemble them.

Abstract: 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 fits, are joined integrally in a state of sandwiching an arm therebetween so as to position the broken-out sections of the armature members at the outer side. Thus, even by the rotation of the armature structure during a printing operation, there does not arise a problem that the armature structure inclines due to eccentric wear, so that a stable printing state can be obtained for a long term.

Abstract: A printer that can be configured either as a dot matrix/impact printer or an inkjet printer. A printer frame mounts a carriage mechanism for reciprocally moving a head carrier. An adapter secures a printhead to the carrier; the adapter being configured to accept a predetermined type of printhead. A compensator/feeder assembly is pivotally movable between a printing position and a printer open position at which a slot for receiving a form is defined. The compensator/feeder assembly mounts a printer bar which is positioned in a confronting relationship with the printhead when the assembly is in the printing position. A compensator drive arrangement is fixed to a base and effects movement in the feeder assembly.

Abstract: A printer selectively prints on heat-sensitive adhesive sheets and ordinary sheets that have no heat-sensitive adhesive. The printer has a printing unit that prints on one surface of a sheet and a printing platen roller that transports the sheet in a forward direction. A cutter unit cuts the printed sheet to a predetermined length, and a thermal activation unit disposed downstream of the cutter unit has a thermal head for heating the other surface of the sheet and a thermal activation platen roller that transports the sheet in the forward direction. A detector detects whether the sheet is a heat-sensitive adhesive sheet or an ordinary sheet, and a control device controls operation of the thermal activation unit so that both the thermal head and the thermal activation platen roller are operated in response to detection of a heat-sensitive adhesive sheet and so that the thermal activation platen roller but not the thermal head is operated in response to detection of an ordinary sheet.

Abstract: 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 shafts of the plurality of armatures together with this armature spacer, there is provided the abrasion preventing member formed of material having higher magnetic permeability than that of the yoke, and hardened by surface hardening processing.

Abstract: 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 body member and an elastic member is integrally joined to the rear surface of the rigid body member, and the elastic member is formed to protrude from the outer side of the rigid body member at least at the engaging portion between a positioning armature stopper and the armature damper. The protruded portion is used as a buffer at the engaging portion between the armature stopper and the armature damper.

Abstract: A perforating print head for a printing device comprising a frame assembly, a plurality of perforating printing assemblies coupled to the frame assembly, each having an impact element further comprising a first end for impacting a printable media surface and a second end suitable for receiving a driving force, and a drive mechanism suitable for applying the driving force to the second end of the impact element. The drive mechanism may be suitable for applying sufficient driving force to the second end of the impact element to allow the first end of the impact element to perforate the printable media surface.

Abstract: 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 for forming a magnetic circuit, wherein a weld zone is formed on the laminated surface of the arm and plates with laser beam irradiation for fixing the arm and the magnetic circuit forming member with the weld zone.

Abstract: 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 direction away from the core, wherein the one end of the coil spring supported by the supporting member is brought into contact with the armature to apply return force to the armature. In order to prevent the breakdown of the armature due to a contact of the coil spring and to realize a stabilized urging operation of the coil spring, a winding end of the coil spring at the one end is located at the position inside of the coil spring and nearer to the supporting member from the contact position where the coil spring comes in contact with the armature.

Abstract: 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 shafts of the plural armatures with the armature spacer for prevention of contact between the support shafts of the plural armatures and the yoke. As the support shafts of the armatures, protected by the abrasion preventive member, are not in direct contact with the yoke, abrasion of the surface of the yoke can be suppressed, and degradation of printing quality can be prevented.

Abstract: 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 and has a pole face, and the pivot shaft is opposed to the core, whereby the armature becomes pivotable. An attracting direction of attraction force F acted on the attracted face by the core and the moving direction in which the attracted face moves due to the attraction force F are made substantially equal to each other.

Abstract: 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 shafts of the plural armatures with the armature spacer for prevention of contact between the support shafts of the plural armatures and the yoke. As the support shafts of the armatures, protected by the abrasion preventive member, are not in direct contact with the yoke, abrasion of the surface of the yoke can be suppressed, and degradation of printing quality can be prevented.

Abstract: 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 extends parallel to the longitudinal direction of a needle bunch, the through holes of the first guide wall and the second guide wall for one needle is shifted from each other in the convergence direction of the needles with a shift amount ?n determined by the distance x and a convergence angle ?n of the needle.

Abstract: In order to realize stable rocking operation of the armature and further obtain magnetic characteristics required for high-speed printing, the magnetic circuit forming member formed of magnetic material like a plate and having the through hole in the direction of thickness thereof is stacked in two or more layers in the direction of thickness, pressure is applied to the two or more stacked magnetic circuit forming members in the stacking direction to make the magnetic circuit forming members adhere to each other, and the two or more magnetic circuit forming members put in the adhering state are subjected to nitriding.

Abstract: A pagewidth printhead assembly that includes a support beam assembly having a composite shell of metals selected so that the shell has a coefficient of thermal expansion substantially the same as that of silicon and a core located within the shell and defining a number of longitudinally extending ink reservoirs for containing respective inks. At least one printhead is mounted on the support beam assembly to receive inks from the ink reservoirs the, or each, printhead including a silicon-based printhead integrated circuit.

Abstract: 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 shafts of the plurality of armatures together with this armature spacer, there is provided the abrasion preventing member formed of material having higher magnetic permeability than that of the yoke, and hardened by surface hardening processing.

Abstract: The thermal printer of the invention comprises a frame, a print head tiltably mounted in the frame, and a spring carried by the frame and forming a member for urging the print head into its printing position, with a flexible sheet of conductors terminating at the print head. According to the first characteristic of the invention, the spring is made of an electrically conductive material and includes a finger for being received in a corresponding orifice of the frame, while a portion of the sheet carries a conductive eyelet through which the finger of the spring passes when the spring is received in the orifice of the frame, the spring thus pinching the eyelet against the frame.

Abstract: 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 laminating plural plates to be provided on an arm, that supports a printing wire, for forming a magnetic circuit.

Abstract: A pagewidth printhead assembly (1) includes at least one pagewidth printhead received in a printhead supporting shell (4). The shell comprises a longitudinal laminated structure defining an interior space and formed from continuous layers of at least two materials (10,11). The layers are odd in number and disposed symmetrically about a central layer (10).

Abstract: 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 on a yoke and an armature spacer provided on the yoke for forming a side magnetic path with respect to the armature, wherein, supposing that each of the saturated magnetic fluxes of the yoke, the armatures and the armature spacer is defined as A, B and C in this order, these components are formed to establish a relationship of A?B?C.

Abstract: By using an ink jet head, which has for each color two parallel columns of nozzles arranged side by side in the main scan direction and shifted from each other by one-half the pitch at which the nozzles are arranged in each column, odd-numbered rasters and even-numbered rasters making up an image are printed by the two nozzle columns. The registration between the odd- and even-numbered rasters is secured during the printing to produce an image with high print quality. For that purpose, the ink ejection timing between the two raster groups is shifted by a predetermined interval to form a plurality of adjustment patterns; the adjustment patterns printed are checked and, according to the check result, an adjustment value for the ink ejection timing between the two ink nozzle columns is entered; and the entered adjustment value is stored to be reflected on the actual printing operation.

Abstract: 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 portion of the yoke and the inner periphery-side ring-shaped portion of the armature spacer push against each other, thereby permitting a magnetic flux to flow efficiently between the armature spacer and the yoke through the contact face between the inner periphery-side cylindrical portion of the yoke and the inner periphery-side ring-shaped portion of the armature spacer.

Abstract: 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 respectively accommodating the support shafts of the plural armatures that respectively support printing wires, and a yoke which holds the support shafts of the plural armatures with the armature spacer. With this structure, the support shafts of the armatures do not directly contact with the yoke owing to the abrasion preventive member, thereby restraining abrasion of a surface of the yoke, and preventing a deterioration of printing quality.

Abstract: A printing method for a dot impact type printer including a printer head with a plurality of printing pins arrayed; a moving mechanism for the printer head, and a control unit for controlling printing operation of the printing pins and the moving mechanism of the printer head, characterized in that when characters, symbols or the like are printed according to predetermined print data, the printing pins to be driven for each step movement of the printer head are driven plural times for each step.

Abstract: A method of controlling noise in an impact printer that modulates the input pulse to the power amplifier of the printer. The resulting current waveform is then applied to the print wire solenoids. The final shape of the force input to the platen reduces or spreads the spectral envelope containing problem harmonics and acoustic output noise.

Abstract: 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 portion of the yoke and the inner periphery-side ring-shaped portion of the armature spacer push against each other, thereby permitting a magnetic flux to flow efficiently between the armature spacer and the yoke through the contact face between the inner periphery-side cylindrical portion of the yoke and the inner periphery-side ring-shaped portion of the armature spacer.

Abstract: 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 support members from both sides in the pivoting direction of the pivot shaft. In at least one support member is formed a concave support groove into which an outer periphery surface of the pivot shaft is inserted in a state of surface contact with the groove. When the armature moves pivotally in a printing operation, the surface of contact increases because the pivot shaft and the pivot groove are in surface contact with each other, thus preventing the occurrence of a local concentration of a strong force on the contact portion between the pivot shaft and the support groove.

Abstract: An ink density closed loop control system for an ink ribbon of an impact printer having a reservoir roller formed of an ink absorbent material with at least one or more channels within the reservoir roller fluidly connected to a pump and ink supply. A transfer roller can contact the reservoir roller for imparting ink to the ink ribbon. A sensor senses the relative amount of ink on the print ribbon and an electrical drive responsive to the sensor drives the pump for a flow of ink to the one or more channels. The sensor can sense ink on different segments of the ribbon and, with two or more channels in the reservoir roller can distribute ink to two or more segments of the reservoir roller depending upon the ink sensed at a particular segment of the ribbon. A further enhancement of this invention provides a multi-viscosity ink to compensate for changes in ambient temperature conditions.

Abstract: In a wire dot printer head of the present invention, an armature is formed by coupling a magnetic circuit formation member having a supported piece with one end inserted into a cavity formed on a surface of a yoke to an arm coupled to a wire. The supported piece of the armature is rotatably supported by a support point, thereby a side surface of the cavity and a side surface of the supported piece, and a bottom surface of the cavity and an end surface of the supported piece can be set in the proximity. Accordingly, magnetic resistance between the magnetic circuit formation member and the yoke can be reduced.

Abstract: A printing apparatus, which performs printing by using a full-line type printhead, prints an image in accordance with an attachment angle of the printhead, and automatically performs registration adjustment when using plural printheads. In the apparatus, an angle of the printhead relative to a transfer direction of a print medium is detected, image data received in raster format is divided into plural pixel blocks, the divided pixel blocks are stored into a memory, the order of reading the pixel blocks from the memory is determined based on the detected relative angle, and the read data is transmitted to the printhead and used for printing.

Abstract: An ink feed arrangement for feeding ink to a printhead of a print engine includes a spine portion. A casing is mounted over the spine portion, the spine portion and the casing defining a plurality of parallel, but isolated, ink supply galleries. A plurality of substantially aligned, spaced ink feed outlets are defined in the spine portion for feeding inks to the printhead. A feed passage is associated with each outlet for placing that outlet in fluid communication with one of the galleries.

Abstract: A marking device (10) comprises a housing (12) having a handle (16). A frame (20) is pivotally mounted in the housing about a first axis (22). A marking head (40) mounted on the frame for translational movement in the frame by a first motor (84) in a first direction (x) parallel said first axis and spaced therefrom. A second motor (100) is arranged to pivot the frame with respect to the housing about said first axis in a second, substantially orthogonal direction (y). The pin moves in a third orthogonal direction (z). The motors (84,100) are disposed within the confines of the frame (20) and move on fixed screws (84,104).

Abstract: Printing systems and methods that reduce inter-color bleeding between dark and light colored inks without losing productivity of a color ink jet printer by distributing the printing of a total amount of black ink required in a single swath over multiple passes while each of the color inks required for the same swath is printed in a single pass. For example, the print method may print a single swath by printing portions of the slow dry black ink in three passes while printing each of the fast dry color inks in single passes.

Abstract: In a technique for correcting printing errors in a shuttle type multifunctional apparatus, a preset reference pattern is printed and the printed reference pattern is scanned. Then, the number of dots are detected as errors between the original reference pattern and the scanned reference pattern. After calculating a correcting value by adding and subtracting the numbers of dots corresponding to the errors to and from numbers of printing nozzles according to a resolution of the multifunctional apparatus, the multifunctional apparatus controls a moving distance of an electric line feeding motor. Accordingly, a simple operation enables the printing errors to be corrected, thereby improving the efficiency of operations in the multifunctional apparatus.

Abstract: 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 classifying into a normal dot b1 and a final dot b2 the dots constituting a print data “a” supplied from an upper-node apparatus 20; and a printing head drive controller 26 for supplying to the printing head 24 a normal dot print drive signal c1 and a final dot print drive signal c2 for the normal dot b1 and the final dot b2, respectively.