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| Number | Title | Issue Date |
| 6146033 | High strength metal alloys with high magnetic saturation induction and method A new high strength steel alloy characterized by having high DC magnetic saturation, ultra high tensile, yield and fatigue strengths that is particularly suited for use as a hammerspring in hammerbanks in impact printers and for other applications where m... | 11/14/2000 |
| 5906157 | High speed impact print hammer An impact hammer assembly for a high speed printer includes first and second permanent magnets having opposite poles disposed adjacent to each other and having a gap therebetween. The magnets create flux lines extending across the gap. A print hammer incl... | 05/25/1999 |
| 5787803 | Dot line printer with mimimum hammer gap arrangement In a dot line printer including a cylindrical platen for supporting a print paper and a hammer bank supporting a plurality of print hammers, the hammer bank is a double bank structure in which a first half of the print hammers are attached to the upper ba... | 08/04/1998 |
| 5474393 | Compact remote-driven encoder A remote-driven encoder which includes a feed tray assembly (12) and an autofeed roller assembly (14) which moves checks one at a time into a check guide path. The check is moved along the check guide path by first and second drive assemblies (16, 20). In... | 12/12/1995 |
| 5399032 | Print head having replaceable print elements for wire dot-matrix printer A print head for a wire dot-matrix printer includes an element base, and a plurality of print elements engaged with and supported by the element base. Each of the print elements includes a print wire, an actuator moving the print wire, and a base supporti... | 03/21/1995 |
| 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 |
| 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 |
| 5251555 | Method and apparatus for simultaneously forming a plurality of characters on the surface of an object The marking device has a housing supporting a marking head for movement longitudinally and laterally preselected amounts controlled by a pair of stepper motors. The marking head has a plurality of marking pins that are air actuated and controlled by appro... | 10/12/1993 |
| 5174671 | Printing mechanism with print hammer having noise dampener A printing device including a print hammer having a noise dampener for use with an impact printer mechanism. The print hammer has a significant mass for impacting a character pad against an ink ribbon, paper and a platen. In a first embodiment the print h... | 12/29/1992 |
| 5104246 | Striker device for printers A striker device for use in printers comprises a platen roller, a character-carrying disc and a print hammer for striking a character of the disc against the roller. The print hammer is actuated by an armature which is movable in an impact direction by vi... | 04/14/1992 |
| 5066150 | Low cost quiet impact printer A serial impact printer including a platen mounted for rotation upon a support frame, a print element having character imprinting portions disposed thereon and a print element selector for moving the print element to position a selected character imprinti... | 11/19/1991 |
| 5031526 | Lubrication system for a print hammer mechanism and assembly A passive lubrication system for use in a high speed print hammer mechanism to provide continuous lubrication to all print hammers over the lifetime of the mechanism. A plurality of hammer elements are pivotally engaged by a common pivot pin element. The ... | 07/16/1991 |
| 5030023 | Printing device with improved bold face printing capability Disclosed is a printing device such as an electronic typewriter and a wire-dot type printer. With the disclosed printing device, control means is operated in response to depression of a character key, on condition that a bold-face print mode is being set ... | 07/09/1991 |
| 4944222 | Printer device with noise reducing impact hammer Printer device in which a striking movement is imparted to a striking member (6) for transmitting a print (5) via an ink ribbon (3) to a paper (2) or the like bearing against an abutment (1). The striking movement of the striking member (6) is effected by... | 07/31/1990 |
| 4934848 | Printer head with adjustable magnetic reluctance A printer head comprising a plurality of driving arms provided corresponding to a like plurality of printing elements and a like plurality of electromagnetic driving devices for driving the corresponding driving arms independently. Each of the electromagn... | 06/19/1990 |
| 4911568 | Printer A printer comprises a type wheel, a hammer to hit a wheel, an ink ribbon, a carriage, a detector for detecting first and second positions of the hammer, and a controller responsive to the detector for generating the first and the second control signals to... | 03/27/1990 |
| 4896596 | Lubrication system for print hammer mechanisms The disclosure describes a passive lubrication system for use in a high speed print hammer mechanism to provide continuous lubrication to all print hammer elements. Channels are formed along the length of a pivot pin and filled with a porous material havi... | 01/30/1990 |
| 4886380 | Piezoelectric controlled electromagnetically driven printing Dot-matrix printer for printing on a paper resting against a platen includes a bendable piezoelectric lamina, means for fixedly supporting the bendable piezoelectric lamina along a first edge, a planar rerromagnetic member, means for operatively connectin... | 12/12/1989 |
| 4880322 | Method for rebound damping of print hammer magnets in typewriters or similar office machines A method of damping the rebound in print hammer magnets in typewriters or similar office machine in which kinetic energy is removed, in a manner known per se, from the armature of the print hammer magnet returning to its initial position by charging the c... | 11/14/1989 |
| 4874265 | Impact mechanism for impact printer An impact mechanism for use in an impact printer, to deliver a printing force to drive a character element against a platen by means of a print tip movable toward and away from the platen. A rockable bail bar having an axis of rotation substantially paral... | 10/17/1989 |
| 4867584 | Impact mechanism for impact printer An impact mechanism for use in an impact printer, to deliver a printing force to drive a character element against a platen by means of a print tip movable toward and away from the platen. A rockable bail bar having an axis of rotation substantially paral... | 09/19/1989 |
| 4859096 | Impact mechanism for impact printer An impact mechanism for use in an impact printer, to deliver a printing force to drive a character element against a platen by means of a print tip movable toward and away from the platen. A rockable bail bar having having an axis of rotation substantiall... | 08/22/1989 |
| 4852481 | Print hammer mechanism A print hammer mechanism for use in an impact printer such as a band printer or other printer which has printing elements which are impacted to make impressions on paper or other record medium. The hammer of the mechanism is impacted by dual armatures in ... | 08/01/1989 |
| 4844634 | Printing head for an impact printer A spring-charge type printing head has an elongatable support including a piezoelectric element provided between an attracting permanent magnet and a hammer-fixing portion. Accordingly, the printing head can be operated at a high speed and require less po... | 07/04/1989 |
| 4833981 | Field replaceable print hammer A hammer assembly for incorporation in a hammer bank assembly useful in high-speed impact printers of the type generally employed in data processing systems is disclosed to comprise an impact tip carried on a rigid coil structure disposed in a permanent m... | 05/30/1989 |
| 4833980 | High efficiency coil posts for print hammer actuators Stored energy print hammer actuators (11) having high efficiency coil posts (19) are disclosed. The coil posts (19) include a cylindrical core (33) mounted on a pin (35). The cylindrical core (33) has high resistivity and, thus, minimizes eddy currents an... | 05/30/1989 |
| 4828410 | Serial print wheel impact printer Disclosed is an improved serial impact printer which both prints and serrates a document. The printer includes a print wheel which is rotated to position a selected character in front of an anvil. The print wheel includes a wheel-like circular member havi... | 05/09/1989 |
| 4821614 | Programmable magnetic repulsion punching apparatus A punch apparatus for punching holes in thin sheet material including a frame, a punch element mounted on the frame for rectilinear movement, which further includes a planar element of conductive material mounted on the punch element, a coil on the frame ... | 04/18/1989 |
| 4817522 | Printer device A printer device having a hammer mechanism for printingly impacting a type drum by means of hammer springs. Hammers are rotatably controlled to retracted positions where the hammers are not brought into contact with a reset cam in each printing cycle, so ... | 04/04/1989 |
| 4790674 | Impact printer having wear-resistant platings on hammer springs and pole piece tips In a dot matrix line printer in which a plurality of hammer springs mounted along the length of an elongated reciprocating hammerbank are selectively released or fired to impact dot printing impact tips mounted thereon against a print paper through a leng... | 12/13/1988 |
| 4783610 | Piezoelectric actuator In a piezoelectric actuator including a piezoelectric element, a pair of lever arms arranged on opposite sides of the piezoelectric element and a flexible member mounted between free ends of the lever arms, wherein deformation of the piezoelectric element... | 11/08/1988 |
| 4768892 | Electromagnetic hammer actuator for impact printer The present invention relates to an assembly of electromagnetic actuators for the hammers of an impact printer arranged side by side and extending along a line. Each actuator comprises a first stator part formed with at least one pole piece, a second stat... | 09/06/1988 |
| 4760785 | Printer with rotating hammers A printer provided with a plurality of printing type wheels, which have printing types at their periphery and can be selectively stopped at the printing position and a hammer disposed so as to be opposite to said printing type wheels, which can push recor... | 08/02/1988 |
| 4759647 | Dual pitch impact printer A printer for printing both standard pitch and condensed pitch characters which includes print hammer faces which have a single wide section for standard pitch characters and a double wide section for printing condensed pitch characters. Using this hammer... | 07/26/1988 |
| 4756246 | Lubrication system for print hammer pivot pin The disclosure describes in detail one of the most serious problems in connection with maintaining the operating life of print hammers at the high speeds of todays printers. Also described in detail is a structural arrangement to solve this problem withou... | 07/12/1988 |
| 4741268 | Planetary transmission system for selective type wheels A wheel printer includes a rotary shaft driven by a motor via a planet gear system to rotate in opposite directions; and printing wheels mounted on the rotary shaft and having types along their circumferential surfaces. Rotation of the rotary shaft is sel... | 05/03/1988 |
| 4737043 | Impact mechanism for quiet impact printer An impact mechanism for an improved serial impact printer for delivering a printing force to drive a character element against a platen by means of a print tip movable toward and away from the platen. The print tip is supported upon a carriage mounted upo... | 04/12/1988 |
| 4722622 | Damping apparatus for a print hammer mechanism Damping apparatus for minimizing print hammer settle time permits an increase in the hammer repetition rate, and in which the damping element is a reactive mass which is freely movable behind the actuated element to effect one or more energy transfer coll... | 02/02/1988 |
| 4721400 | Hammer unit for printers This invention provides a hammer unit for use in character printers in which the front end of the plunger of the solenoid operating under control of the print command is positioned directly opposite to and close to the type face of the character head, wit... | 01/26/1988 |
| 4715277 | Type selection mechanism for a printer A printer includes a drive claw associated with a printing wheel and having a projection engageable with axial, circumferential grooves of a drive shaft. The printing wheel is linked to and rotated by the drive shaft when the projection of the drive claw ... | 12/29/1987 |
