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| Number | Title | Issue Date |
| 5586828 | Printer with printing hammer The printer such that when characters are printed, a carriage is moved in a printing direction. Corresponding to the direction of the movement of the carriage, a printing hammer driving mechanism is selected through a pivotal lever, a pendulum member, and... | 12/24/1996 |
| 5423618 | Piezoelectric print head control device using adjacent dot data The present invention provides a print head control device for a wire dot printer, capable of preventing the occurrence of ghost dots to enable the wire dot printer to print characters and the like with a high print quality. The print head control device ... | 06/13/1995 |
| 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 |
| 5213424 | Piezoelectric actuator device A piezoelectric actuator device for use in a printing machine and comprising a laminated piezoelectric element sandwiched between first and second blocks, and first and second leaf springs attached to upper and lower surfaces of the first and second block... | 05/25/1993 |
| 5193922 | Serial printer A serial printer for printing recording paper has a printing head movable at a right angle with respect to the feeding direction of the recording paper. Vibration applying means, such as a piezoelectric element, is mounted on the outer circumference of th... | 03/16/1993 |
| 5184901 | Displacement magnifying mechanism for a print element A displacement magnifying mechanism includes a base member and an electro actuator having a free ene and a base end connected to the base member, and having an actuator axis defined as passing through the free end and the base ene. The electro actuator ha... | 02/09/1993 |
| 5167458 | Wire driving mechanism A wire driving mechanism for a wire-dot print head employs a piezoelectric element or a magnetostrictive element as a driver (5). To enable printing with a satisfactorily high print quality, the wire driving mechanism employs the extensional force of the ... | 12/01/1992 |
| 5165809 | Piezoelectric actuator and print head using the actuator, having means for increasing durability of laminar piezoelectric driver An actuator for operating a desired driven member, including a laminar transverse-effect type piezoelectric driver having laminated piezoelectric elements which are displaced upon application of a voltage thereto in the direction of lamination. The actuat... | 11/24/1992 |
| 5133612 | Dot impact type printing head with adhesively attached base unit In a print head of a dot matrix printer, support frames carrying the piezoelectric elements of the print wires are seated in and bonded to a base unit to provide a rigid, unitary printing structure. The base unit has projections extending therefrom which ... | 07/28/1992 |
| 5092689 | Piezoelectric driver of wire-dot impact printer A printing head includes a plurality of printing members constituting a dot matrix, and a plurality of actuators for driving the printing members, respectively. Each of the actuators comprises a resiliently movable member having one end to which the print... | 03/03/1992 |
| 5046872 | Printer actuated by piezoelectrically generated shock wave An impact printer is described which includes a shock wave generator means, a print hammer, and a solid wave guide interposed between the shock wave generator and print hammer. The solid wave guide acts to transmit a shock wave from the shock wave generat... | 09/10/1991 |
| 5033883 | Variably-controlled electromagnetically driven printer Dot-matrix printer for printing on a paper resting against a platen includes a bendable piezoelectric lamina which is supported along a first edge planar ferromagnetic member which is operatively connected to the bendable piezoelectric lamina at a region ... | 07/23/1991 |
| 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 |
| 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 |
| 4865475 | Printer adjusting the print hammer position for precise printing A printer, which can adjust the attached position of the print hammer without a device specifically provided for the position-adjustment, is provided with an adjustment mode in addition to a normal printing mode. In the adjustment mode, a predetermined ty... | 09/12/1989 |
| 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 |
| 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 |
| 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 |
| 4746236 | Printer with a motor controlled by chopping means A printer in which a daisy wheel on a carriage is caused, by a hammer actuating mechanism, to impact against a printing sheet fed by a sheet feed mechanism, so that the sheet is printed with use of a ribbon interposed between the sheet and the wheel. The ... | 05/24/1988 |
| 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 |
| 4711170 | Printing wire driving device in wire dot printer The present invention relates to a printing wire driving device in a wire dot printer which can perform accurate control with small power and has a large printing wire driving power. In the present invention, a driving member is driven by an eccentric cam... | 12/08/1987 |
| 4685816 | Impact printer with means for adjusting the associated print hammer An impact-type, printing apparatus which is readily adjusted to enable the impact face of the associated print hammer to be precisely located with reference to the plane of a character (or a typewheel) to be printed to enable printing in special fonts lik... | 08/11/1987 |
| 4683820 | Printing mechanism A printing mechanism for use in an impact printing system primarily intended for the transfer of a dry film impression onto an image carrying tape. The mechanism includes a hammer (130), and an anvil (126). The hammer is actuated by lever arm (164) which ... | 08/04/1987 |
| 4579056 | Printing mechanism A printing mechanism for use in an impact printing system primarily intended for the transfer of a dry film impression onto an image carrying tape. The mechanism includes a hammer (130), and an anvil (126). The hammer is actuated by lever arm (164) which ... | 04/01/1986 |
| 4538931 | Drive mechanism including a one-way spring clutch for a typewriter A drive mechanism for a member to be driven in one direction is disclosed. The mechanism is incorporated in an electronic typewriter and includes a clutch including a clutch spring which provides a driving connection between a small DC motor and the membe... | 09/03/1985 |
| 4530280 | Printing hammer assembly with a hammer dampener comprising two opposed permanent magnets A printing hammer assembly for use in impact printers includes a printing hammer which has an impact surface and an armature and which is supported to be movable in a reciprocating manner along its longitudinal axis, a driving solenoid which drives to mov... | 07/23/1985 |
| 4525084 | Device for adjusting position of printing head of printer A device for adjusting the position of the printing head of a printer has a leaf spring received in a groove formed in the carrier of the printer. The spring is bent into a doglegged form such that the spring force is applied to both ends of the carrier b... | 06/25/1985 |
| 4427312 | Printwheel detent A printwheel 20 for a daisy wheel printer 10, the printwheel 20 including a hub portion 23 and a plurality of radially extending, deflectable petals 21 projecting therefrom. The petals include a pad or tip 24 thereon with print forming indicia on one surf... | 01/24/1984 |
| 4423972 | Serial printer A small and light-weight serial printer adapted to portable electric-powered typewriters and output devices of personal computers. The serial printer of the present invention requires a reduced number of drive sources and is simply constructed. The serial... | 01/03/1984 |
| 4324497 | Print hammer assembly with amplified multi-location impacts A print hammer assembly is disclosed comprising a support structure having a plunger at a first location thereon, and means for movably mounting the support structure with its plunger adjacent an electromagnetic actuator capable of being selectively energ... | 04/13/1982 |
| 4044455 | Method of making a printing hammer unit A printing hammer unit is produced by forming a group of hammers having hammer portions secured to resilient members of electrically conductive material connected together by connecting portions and also forming a base integrally secured to the resilient ... | 08/30/1977 |
| 3964592 | Printing mechanism for printing characters A printing mechanism for printing characters comprises a rotatable hammer confronting through a recording paper the surface of a character pattern bearing body having a plurality of character patterns embossed in a predetermined array on its surface; a st... | 06/22/1976 |
| 3954054 | Squeeze printer for papers or stacks of papers of varying thicknesses A squeeze printer for papers or stacks of papers of varying thicknesses wherein a plurality of printing platens are provided comprising individual flexible wall sections of a paper supporting chute which will accommodate different thicknesses of paper or ... | 05/04/1976 |
