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93.05
This subclass is indented under subclass 93.04.  Apparatus in which there is provided a plurality of flexible relatively movable elongated members, end portions thereof or separate members at the end portions cooperating therewith striking a relatively stationary member to perform a print action, each end portion or separate member thereat printing a respective portion only of a character or symbol.

 
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Patent Number
Title
  Date
3942620 Printing mechanism Mar-9-1976
A printer of the wire type including 8 print wires disposed in a row and each actuatable by an electromagnet for printing individual characters defined by eight dots high and seven dots wide on a longitudinally movable ticket medium. The printing mechanism is also capable of printing fractions including...     
3948168 Digital printer Apr-6-1976
A printer for printing in alpha-numeric character form information from a digital source available in the form of a video-type signal representative of alpha-numeric characters corresponding to the digital information. The printer utilizes a high speed rotating spindle having at least one spiral electrical...     
3966035 Printer Jun-29-1976
A low cost dot printer head which includes a base plate of ferromagnetic material with slots that divide a rear portion of the plate into several magnetic circuits that are isolated from one another and that hold separate coils for individually magnetizing the circuits, the head also including an armature...     
3967714 Matrix printer having detachable elements Jul-6-1976
The invention relates to a matrix printer having a bar-shaped member which is movable along a recording sheet and carries a plurality of straight mutually parallel recording styli which are mounted in a holder and are adapted to be moved perpendicularly to the recording sheet by means of electric energization,...     
3991870 Replaceable composite wire guide assembly Nov-16-1976
The print head in a high-speed printer of the dot matrix type is provided with a bearing comprising an element fixedly attached to the front wall of a plastic block. The element is made of a material substantially harder than plastic, such as metal or a jewel. Guide passages extending through the element...     
3994381 Wire matrix print head Nov-30-1976
A wire matrix print head comprised of a plurality of impact print wires or styli, each having an input end for receiving an impact and an output end for delivering an impact to a record medium through an inking ribbon. The impact end of said wires or styli are arranged in a specialized elliptical format...     
3999644 Printing device comprising recording pins Dec-28-1976
A printing device for printing characters, composed of dot-like or line-like elements, by means of recording pins which are driven by electromagnets. The recording pins are connected to the armature of the electromagnets and are guided in a bar which can be displaced in front of a recording sheet. The...     
4000801 Print wire attachment Jan-4-1977
An improved means for attaching print wires in a wire matrix print head mechanism is disclosed which enables the use of brittle wire materials having long wear life, such as tungsten carbide, to be attached to a moving armature in a manner which eliminates or reduces the flexural stresses so that the...     
4004671 Wire matrix print head Jan-25-1977
A wire matrix print head for a dot matrix printer employs a plurality of electromagnetically actuated print wires converging forwardly through a wire guide member for termination at their leading ends in confronting and adjacent relation to the print medium. The trailing ends of the print wires are mounted...     
4005770 Printer Feb-1-1977
A printer is disclosed which comprises a type platen and a type head opposite the periphery of said type platen and spaced apart therefrom to form a given gap spacing therewith. The type head is located in a plane extending perpendicular to the axis of the type platen and is movable in a direction parallel...     
4009772 Mosaic printing head Mar-1-1977
In a mosaic printing head for applying lettering by means of needles which are ejected as the head is passed over a sheet of paper, the needles are accommodated in a tubular column of bearing metal. Near one end, the tube is formed with a transverse wall containing a circular arrangement of guide holes...     
4010835 Matrix print head Mar-8-1977
A serial matrix printer has a print head mounted to move along a print line. The print head has means to change the relative vertical positions of some of the print wires with respect to the others. A first embodiment uses a pair of wire guides arranged so that one is translatable with respect to the...     
4027762 Dot printer Jun-7-1977
Each wire of a wire printer is driven by a separate pneumatic motor. Each motor is actuated by compressed air which is selectively passed through an electrically operated valve for each motor. Each valve is actuated by an electric signal indicating whether the associated printing wire should be driven...     
4029190 Font conversion apparatus Jun-14-1977
Apparatus for energizing a selected one or more of a plurality of actuation devices in order to cause a printing element associated with each selected actuation device to strike an adjacent recording medium. The apparatus comprises memory means responsive to a predetermined address signal for supplying...     
4031992 Printing device Jun-28-1977
A printing device, for example of the needle impact type, is equipped with lectrical means controlling the operation of the needles to produce alternative forms of printed data, for example letters of different degrees of inclination.
4050563 Apparatus for selectable font printing Sep-27-1977
Apparatus for use in a dot-matrix type impact printer for printing each line of characters and/or graphic data in a selective one of a plurality of character fonts and/or formats. In one preferred embodiment, a manual selection is made corresponding to either a normal or compressed spacing between adjacent...     
4059182 Mosaic printer Nov-22-1977
A mosaic printer comprising a printing head with relative movability along a printing line on a printing sheet to be printed. The head supports a number of wire ends arranged along a substantially rectilinear line extending perpendicular to the printing line and each wire end upon excitation producing...     
4072224 Printing devices Feb-7-1978
A tape printer which is for use with pressure-sensitive paper tape and which prints characters in the form of dots disposed in a 7.times. 7 or 7.times. 5 matrix has its printing elements formed by a stack of seven metal strips. Each of these strips has an associated electromagent and upon energization...     
4079824 Double speed dot matrix printhead Mar-21-1978
A dot matrix printer including a single printhead having two columns of print wires, the wires in one column being used to print only odd numbered dot columns on a record member and the wires in the other column being used to print only even numbered dot columns on the record member. In one embodiment...     
4091909 Wire matrix printer printhead assembly May-30-1978
A wire matrix printer mechanism is designed to print a series of alpha-numeric characters and symbols by mechanically impacting an inked ribbon with a column of small diameter steel wires, driving the ribbon into paper riding on a platen. The body through which the print members pass is a molded structure...     
4109777 Ticket printer Aug-29-1978
A ticket printer is disclosed. A motor equipped with a centrifical speed governor, opposing ticket rollers and ticket transport tray rolls a blank, multipage ticket form past seven needle printing heads which are solenoid actuated and two sequencing switches. The ticket to be printed is inserted into...     
4125336 Dot matrix printer Nov-14-1978
A dot matrix printer including a dot matrix print head assembly including a plurality of thin, elongated print wires having printing end surfaces, and a bearing member for supporting the print wires adjacent their printing end surfaces. The bearing member has a plurality of bearing apertures, with the...     
4134691 Printing head Jan-16-1979
A printing head for dot matrix printers, including novel electromagnet structures for driving individual printing wires. In each electromagnet, a pair of coils generally radial to the printing wire axis drive an armature coaxial with the printing wire and to which it is attached. The head is specifically...     
4136978 High speed electromagnetic printing head Jan-30-1979
A high speed printing head comprises a circular array of stylii drivers for printing characters in a dot matrix format. Each driver includes a permanent magnet and bucking coil electromagnet which when energized causes a stylus to impact a printing surface. The stylus is carried on the end of an arm...     
4140406 Dot matrix print head Feb-20-1979
A printing head for forming dot matrix characters which includes a wire stylus assembly having a plurality of guide bearings spaced to reduce the wear of the tip bearing, and to minimize buckling and resonances. Each stylus is driven by an electromagnetic actuator having a hinged armature, with the stylus...     
4143979 Printhead needle cap Mar-13-1979
A print member of the printhead of a ballastic type wire matrix printer terminates in an impression end and in an activation end. A cap is formed at the activation end for contact by the blade-like armature of an activating electromagnet. A tip is formed at the activating end of the member with a first...     
4154541 Printer head assembly May-15-1979
A printer head assembly for use in high speed printers of the dot-matrix type. The assembly includes a plurality of solenoids affixed to a bevelled rear wall of a bracket and arranged in such a manner that they are located equidistantly from one another on the circumference of the rear wall of the bracket...     
4157873 Dot printing apparatus Jun-12-1979
A ferromagnetic core fixed to an end of a wire is electromagnetically attracted such that the core and wire are axially moved so that the free end of the wire strikes paper through a ribbon to print a dot. A leaf spring returns the core and wire to a standby position in which the core abuts against a...     
4159882 High quality printer Jul-3-1979
The printing apparatus disclosed herein generates alphanumeric characters of high quality, using a multi-pin printing head capable of forming discrete dots or pels, by controlling the actuation of the printing head with a timing resolution which is an order of magnitude finer than the nominal dot diameter...     
4162651 Document printer Jul-31-1979
Disclosed is a document printer of the type suitable for imprinting messages upon individual documents fed into the apparatus (e.g., bank checks). The apparatus includes an internal printing station disposed along a document feed path. The path includes a feed slot in an exterior wall of the apparatus....     
4167343 Print wire actuator mechanism Sep-11-1979
This invention relates to a wire matrix printer system using a plurality of unique print wire actuator mechanisms operable to print dots on a printing medium. The novelty is in each print wire actuator mechanism using an electro-mechanical combination including (1) a print wire actuator; (2) a permanent...     
4176976 Mosaic printing head Dec-4-1979
Printing members comprising a mosaic printing head are driven by flexural bending elements which are electrically actuated to produce a desired printed pattern. The bending elements may take the form of piezoelectric strips or diaphragm pieces which are supported by bearings located at nodal oscillation...     
4185929 Wire matrix print head assembly Jan-29-1980
A wire matrix print head assembly having bearing and guide apparatus for a plurality of circumferentially spaced reciprocable wire members comprising one or more elongated bearing members each having a plurality of elongated passages, there being one passageway in each bearing member for each wire member...     
4192618 High speed ticket printer Mar-11-1980
A matrix printer which is specifically adaptable for printing and the like is characterized by having a stationary print head containing a plurality of print wires which are arranged in a single row extending transversely of the direction of travel of a relatively heavy paper stock. The paper is advanced...     
4196665 Printing machine arrangements Apr-8-1980
A ticket printing machine having reversible means for propelling a ticket between two points. The machine has a printing head which is movable transversely to the track of the ticket in a plane parallel to the plane of the ticket. The printing head is driven in steps across the track of the ticket. The...     
4200401 Print wire solenoid Apr-29-1980
A print wire solenoid for high-speed operation is made with two major components or subassemblies. The first is a plastic injected unitary bobbin or stator assembly which incorporates a core ring and a core, and a stator which forms a bobbin for receiving an electric coil. The parts in the stator are...     
4204777 Matrix printer control system May-27-1980
A system of controlling the operation of a matrix printer wherein printing is performed in each direction of travel of a printing element carriage. A printer control large scale integrated device is combined with a programmable character memory device and associated circuits for responding to character...     
4208137 Position sensing for matrix printer Jun-17-1980
An alternating current coupled dot column sensing circuit provides delayed dot position signals for control logic of a matrix printer to actuate the printing elements at the proper dot column positions in bi-directional printing. A sensor recognizes edges of slots in a timing strip across the printer...     
4208138 Dot matrix printer head Jun-17-1980
A dot matrix printer with a plurality of armature magnet units mounted on a printer head bracket, each armature magnet unit having an armature with a printing needle attached at one end and pivotally secured to a magnet yoke shank at the other end by one end of a U-shaped spring bracket. The spring bracket...     
4210917 Multicolor multipoint recorder Jul-1-1980
A multipoint recorder has a multicolor ink cartridge arranged to be selectively aligned with a recording head having a plurality of selectively energizable recording elements whereby a color from the multicolor ink cartridge is selected for printing by the recording elements. A fixed color operation...     
4211495 Head for a mosaic printer Jul-8-1980
A plastic laminate including a wedge having sides with a large radius and one or two grooved plates, flat when unstressed, and stressed when clamped to the wedge to conform to the radii thereof. The grooves then are three-dimensional and easily guide the print wires of a mosaic printer. Another advantage...     
4211496 Printing solenoid Jul-8-1980
Disclosed is a printing solenoid for a high speed wire matrix printer which provides efficient operation at voltages in the order of 10 to 12 volts DC while maintaining a reduced physical size while at the same time drawing no noticeable increase in current over printing solenoids of comparable size...     
4214836 Impact print head Jul-29-1980
An impact print head for a matrix printer employs the usual set of wires slidably mounted in the head which are selectively extended from the working end of the head toward a platen by energizing solenoid actuators. However, in lieu of the usual solenoid strikers, return springs therefor and print wire...     
4218149 Wire printer Aug-19-1980
A wire printer comprising a wire guide block provided with a plurality of print wires and a wire drive block providing individual electromagnet devices for independently driving the print wires. The wire drive block is installed on a base frame so as to be stationary thereon and the wire quide block...     
4218150 Matrix printer Aug-19-1980
A moving coil mechanism is utilized to operate each individual print wire of a matrix printing head. Static magnetic fields for the moving coil mechanism may be provided by permanent magnets. Also disclosed is a method for compensating varying frictional forces by sensing the voltage induced in the moving...     
4225250 Segmented-ring magnet print head Sep-30-1980
A print head for a serial dot matrix printer comprising a sandwich structure including a base plate, a segmented-ring magnet, a print hammer disc and face plate is disclosed. The segmented-ring magnet comprises a ring formed of a magnetic material having spaced apart, magnetized, regions (segments)....     
4226544 Wire printing heads Oct-7-1980
A wire printing head is disclosed in which solenoids are arranged in arcuate configuration, the printing wires being connected in line with their respective solenoids. A wire guide is positioned adjacent the printing line and preformed tubes are used to guide the wires from the solenoids to the wire...     
4230038 Matrix print head assembly Oct-28-1980
A wire matrix print head assembly in which armatures are mounted between pairs of magnetic pole members and wire printing members with coplanar radially spaced pole member end surfaces facing the direction of movement of the armatures and the wire printing members during printing movement from a non-print...     
4230412 Matrix print head assembly Oct-28-1980
A wire matrix print head assembly having a plurality of circumferentially spaced armature members in which each armature member is operatively associated with a pair of radially spaced magnetic pole members and a coil associated therewith, each armature member being mounted between the pole members and...     
4242003 Multi-pass matrix printing Dec-30-1980
In a printer including a record material movable past a printing station, and a print assembly capable of printing a line of characters in dot matrix format upon relative movement of the print assembly and the record material in a first direction, a method and apparatus is disclosed for printing the...     
4244658 Dot printer head Jan-13-1981
In a dot printer head, a small, thin and flat lever or chip pivots on a fulcrum when attracted by an electromagnetic coil. Pivoting of the chip on the fulcrum drives a needle, in opposition to a biasing spring, against an ink ribbon and paper for printing on the paper with dots. The biasing spring returns...     
4248540 Printer arm Feb-3-1981
An arm for holding the impact stylus of a high speed dot matrix printer is fabricated from a single stamping which when properly folded defines two members having C-shaped cross-sections joined by a thin web. The web is folded around the stylus to bring the 4 legs of the two C-shaped members into overlapping...     
4256408 Dot matrix print head Mar-17-1981
There is disclosed herein a dot matrix tilting print head assembly in which the print head is rotatably mounted in a frame. A solenoid is provided for rotating the print head a controlled distance so that printing occurs between previously printed dots. A pin extending from the print head is positioned...     
4260270 Mosaic printing head Apr-7-1981
An impact matrix printing head for use in a computer printer. The printing head utilizes a unique design to provide an unitary needle guiding assembly and an unitary electromagnet assembly which can each be independently removed from the printer head without the need to disassemble. The printer head...     
4261039 Microprocessor controlled positioning system Apr-7-1981
A microprocessor controlled printer includes a forms feed assembly, a dot matrix print assembly, a ribbon drive assembly and a number of emitter assemblies associated with the foregoing to provide positional information during operation of the printer which prints on a line-by-line basis. During the...     
4264396 Labelling machines Apr-28-1981
A labelling machine has a push button switch, actuation of which causes a label to be printed by a thermographic printing head with selected data which has been stored in a microprocessor by operation of a keyboard. The printed label is fed by an electrically powered drive mechanism controlled by the...     
4268180 Dot printer wire May-19-1981
A dot printer wire comprising: a smaller diameter forward section provided with a printing portion at the foremost end; a base section having a larger diameter than said smaller diameter forward section; and an intermediate section which lies between said forward and base sections and whose diameter...     
4279521 Wire matrix print head Jul-21-1981
A wire matrix print head has a first group of wires activated by a first group of electromagnetic means disposed on the circumference of a circle and substantially equally angularly spaced from each other. A second group of print wires is activated by a second group of electromagnetic means disposed...     
4284363 Data matrix print head Aug-18-1981
There is disclosed herein a dot matrix tilting print head assembly in which the print head is rotatably mounted in a frame. A solenoid is provided for rotating the print head a controlled distance so that printing occurs between previously printed dots. A pin extending from the print head is positioned...     
4285603 Wire printing device Aug-25-1981
A wire printing device comprises a plurality of printing wires, each one associated with a corresponding driving electromagnet and a frame which is constituted by a plate folded in order to have a central portion, on which are mounted the electromagnets, and a pair of tongues which support guide elements...     
4300845 Dot matrix print head Nov-17-1981
A dot matrix-type print head for forming a character-defining array of individual dots on a print-receiving surface includes a plurality of parallel-spaced print wires arranged in a vertical plane perpendicular to the print receiving surface. The print wires are individually actuated by respective actuator...     
4306497 Dot matrix type printer Dec-22-1981
An improved dot matrix type printer including a carriage mechanism for a printer head having a plurality of printer elements aligned immediately before a platen adapted to carry a sheet of paper to be printed and along a direction parallel to the axis of the platen, the carriage mechanism comprising...     
4317635 Matrix printing head Mar-2-1982
In a matrix printing head (1) including at least one printing needle (9), an electromagnet (2), which is provided with an armature (4) co-operating with the printing needle for moving the latter towards a printing position, and a spring (6) for returning the needle in a direction from the printing position,...     
4320981 Matrix printhead apparatus Mar-23-1982
An improved wire matrix ballistic impact printhead apparatus including a plurality of engaging structures for maintaining the armatures of a like plurality of electromagnetic actuators in proper positional alignment with the associated print style, for allowing individual adjustment of armatures to optimize...     
4335969 Print head Jun-22-1982
A guide member for print needles and a base plate with guide apertures traversed by the rear end of the needles are bolted to a magnetic core element, having annularly arranged poles; a cover is also bolted thereto, sandwiching a case in between. The cover centers an annular element having radial spring...     
4338585 Solenoid having a hinged armature Jul-6-1982
Hinged armature magnet for matrix printer head with a hinged armature (24), which near its one end is fixed one end of the magnet yoke (12) by means of a mounting part (48) so as to be able to swing out against spring force, wherein the hinged armature (24) and the mounting part (48) rest in common against...     
4341478 Wire printing device Jul-27-1982
A wire printing device comprises a plurality of printing wires, each one associated with a corresponding driving electromagnet and a frame which is constituted by a plate folded in order to have a central portion, on which are mounted the electromagnets, and a pair of tongues which support guide elements...     
4349283 Hammer for dot matrix printer Sep-14-1982
Each hammer includes a frame-like portion with a recess into which an electrically energizable flat coil is received. Affixed to opposite sides of the frame portion, and extending therefrom over the recess in contact with the sides of the coil, are thermally conductive metallic foil sheets which serve...     
4353298 Partial line turnaround for printers Oct-12-1982
A printer is provided with facilities for increasing the printing throughput. This involves a partial line turnaround operation. The printer has means to move a form or document past a print line, a ribbon drive assembly, and a print assembly incorporating a plurality of print wires arranged in print...     
4365902 Wire matrix print head Dec-28-1982
A multiwired print head having an elongated conical center member with wire guiding sections formed thereon and with a plurality of recessed portions for minimizing the surface contact area between the print wire and the elongated member. In addition, the elongated member mounted within a frame having...     
4367962 Mosaic printing head Jan-11-1983
A mosaic printing head for use in a computer printer includes a needle guiding assembly and an electromagnet assembly for activating the needles. The printer head utilizes a unique design to provide for simple and fast adjustment of the position of each printing needle while eliminating any effect on...     
4372696 High quality printer Feb-8-1983
A high quality, variable font, matrix printer employs a precise carriage position control system that precisely determines the position of the carriage at discrete positions in combination with a variable time delay in the matrix element firing circuit to permit each printed matrix element to be positioned...     
4375338 Wire dot print head Mar-1-1983
An improved wire dot print head assembly for a wire dot printer including a resilient securing spring for holding the assembly elements secure is provided. The print head assembly includes a plurality of print wires, each selectively driven through a print nose by a plurality of electromagnets disposed...     
4382701 Wire matrix printing apparatus May-10-1983
A wire matrix printing head moveable along a printing line on a record medium is described in which a ring of wire-selection electromagnets are grouped about the wire guiding arrangement, the electromagnets each having a basic yoke assembly with a pair of limbs each able to support a separate energising...     
4394093 Support means for print wire Jul-19-1983
A print head for a serial dot-printer which includes improved structure to fix each print wire to a pivotable armature. The armature is provided with an arm portion which is made of a stainless steel plate and consists of a pair of mutually opposed side portions and a connecting portion connecting the...     
4396304 Print head and drive circuit Aug-2-1983
Wire printing apparatus includes a print head having at least one print wire and associated actuating mechanism and drive circuit. In the drive circuit a capacitor is charged to a predetermined voltage through an inductance and then discharged through the coil of an electromagnet in the actuating mechanism....     
4400101 High-quality/high-speed matrix printing Aug-23-1983
The print head of a matrix printer includes two columns of print wires held in separate members which are individually vertically displaceable as well as together in order to obtain different conditions for printing. Good quality or high-speed modes can be obtained in a single pass, high quality in two...     
4400102 Multi-color print head Aug-23-1983
A dot matrix impact printer for printing a plurality of colors substantially simultaneously. A print head is comprised of three spaced substantially parallel columns of print wires, each column containing an equal number of print wires. Separate independent ink supply sources are provided immediately...     
4401392 Dot matrix print head Aug-30-1983
This invention involves methods and apparatus relating to the assembly and structure of a dot matrix print head. The invention includes a single unit, coil assembly of a bobbin, coil, and clapper which can be removeably placed as a unit among fixed pole pieces and yoke members in the print head. The...     
4407591 Ballistic wire matrix print head Oct-4-1983
A wire printing head of ballistic type comprises a front guide fixed to a carriage and in which the printing wires are mounted in an axially slidable manner. The electromagnets for actuating the wires have their respective cores mounted inside a tube of non-magnetic material. In order to obtain high...     
4407692 Hand-held electrically selectable labeler Oct-4-1983
There is disclosed a hand-held labeler having a print head with electrically selectable printing elements for printing and applying pressure sensitive labels. The labeler has a housing with a handle and structure for mounting a roll of pressure sensitive labels releasably carried on a carrier web. The...     
4411538 Print-head of a dot-printer Oct-25-1983
A print head adapted to be used for a dot-printer. A novel support device is disposed in the print head for pivotally supporting one end of each of a plurality of armatures on a support member. The support device in this invention comprises; (a) a leaf spring disposed longitudinally of the armature,...     
4423969 Print head Jan-3-1984
An impact dot matrix print head has a body with a coil frame assembly and a nose piece on the rear of which the coil frame assembly is mounted. The nose piece has guides for print wires which are maintained in sliding relationship by a linear slot guide at the front end of the nose piece. Armatures are...     
4428691 Dot matrix printer head Jan-31-1984
Arranged in the bottom of a cup-shaped cylindrical casing is a solid disc form of axially uniformly magnetized permanent magnet having a single pair of poles each formed on one or the other of its opposite end faces over the whole region thereof. A circular plate of magnetically permeable material is...     
4428692 High speed impact matrix printer Jan-31-1984
An improved high speed impact matrix printer is provided for use with data processing systems and digital communication systems. In the serial wire matrix printer (10) of the preferred embodiment, a printhead (36) has print wires (90) arranged as a column within a wire guide (88). The printhead (36)...     
4433926 Printer head Feb-28-1984
A printer head having a circular first yoke, a cylindrical permanent magnet fixed on the circular first yoke, a (n) number of electromagnets (n is an integer) positioned on a circle on the first yoke within the permanent magnet having predetermined angle intervals, a ring shaped second yoke fixed on...     
4437775 Dot printer head Mar-20-1984
In this invention, the rear ends of the printing needles are bent and prevented from being pulled out by being embedded in needle caps. The needle caps are flat, and the longitudinal directions of the cross-sections of the needle caps are coincident with the radial direction of the printer. The rear...     
4441828 Printing head of dot printer Apr-10-1984
A spring support which receives one end of a needle spring to urge the needle in a reset direction is free to move forwards or backwards. During assembly the spring support is disposed in the top end direction of the needle such that the needle is stable at the inserting state of the top end in the needle...     
4441830 Printing solenoid Apr-10-1984
A dot matrix print actuator of low cost and compact rectangular design is constructed of flat, mild steel stock. An armature is engageable with a spring loaded print wire which is guided through a passageway in the poles of the actuator which are on either side of a bobbin containing coil.
4443122 Dot matrix print head Apr-17-1984
This invention involves methods and apparatus relating to the assembly and structure of a dot matrix print head. The invention includes a single unit, coil assembly of a bobbin, coil, and clapper which can be removeably placed as a unit among fixed pole pieces and yoke members in the print head. The...     
4447166 Printing head of dot printer May-8-1984
In printing head of a dot printer according to this invention, a groove having width a little greater than diameter of top end of a needle is formed in front of a needle guide to guide the needle, position of top end of the needle is specified between the bottom of the groove and front surface of the...     
4457635 Printer arm Jul-3-1984
A printer arm for transmitting an impact to a wire stylus in a wire matrix printing head is disclosed. The print arm includes a lever to one end of which the wire stylus is connected. The lever operates in the longitudinal direction of the wire stylus. The lever is a hollow member of a polygonal cross-section...     
4459051 Matrix printer Jul-10-1984
A matrix printer comprises a print head for effecting recording on a recording medium, a print wire provided on the print head, a holding member provided on the printing end side of the print wire and movable relative to the print wire, and control means for moving the holding member.
4468141 Character generator Aug-28-1984
A character generator for generating characters which are transferred to a recording medium by a dot-matrix print head. In the character generator there is stored for each character the information required for the activation of the printing needles of the print head. The information comprises two parts,...     
4468142 Pint wire actuator Aug-28-1984
A solenoid-type print wire actuator includes a unitary one-piece bobbin formed of a magnetically permeable material and having two axially spaced-apart annular grooves in the outer surface thereof. An electromagnetic coil is wound on the bobbin. A dumbbell-shaped armature is disposed coaxially within...     
4470713 Writing head Sep-11-1984
The needle writing head comprises a support in two parts (5 and 6), each comprising recesses (15, or 18) forming guide paths for needles (16) located along two rows. The part (6) is movable parallel to the row of needles (16) over a distance equal to one-half of the distance between centers of the needles...     
4472072 Printing apparatus Sep-18-1984
A printing apparatus having a plurality of printing wires or hammers. The printing apparatus has a main drive driven continuously at a resonance frequency so as to supply energy to the plurality of printing wires or hammers, a plurality of selective drives corresponding to the plurality of printing wires...     
4478143 Printer Oct-23-1984
The printer includes a common feed and eject portion constructed as friction belt drive; it further includes a friction drum and a print head and cutter between the drum and the ejection portion which participates in the advance during printing but runs a little longer than the friction drum to hold...     
4478528 Wire matrix print head assembly Oct-23-1984
A wire matrix print head assembly in which the print wires are operably supported in one-piece bearing and guide passage block member in an elongated wire housing with wire actuating armature members arranged in a circular array between radially innermost and outermost poles of electromagnetic armature...     
4481880 Dot printer Nov-13-1984
A dot printer in which vibration is eliminated without the use of a separate counterweight. The printer includes first and second hammer banks each holding a plurality of dot printing elements. The first and second hammer banks are spaced apart from each other a predetermined distance in the direction...     
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