Famous Patents
William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7241420 | Capillary-channel probes for liquid pickup, transportation and dispense using stressy metal Fluidic conduits, which can be used in microarraying systems, dip pen nanolithography systems, fluidic circuits, and microfluidic systems, are disclosed that use channel spring probes that include at least one capillary channel. Formed from spring beams (e.g., stres... | 07/10/2007 |
| 5711622 | Printer element An integrally-formed print element for providing finer dots than previously possible with an impact printer. The dots produced permit the printing of Chinese, Amharic, Devanagari, and like characters, in sizes as small as standard newsprint, and print in ... | 01/27/1998 |
| 5174664 | Armature with angled bore for print needle fastening A matrix printhead having a plurality of electromagnetic drives arranged in a cluster including a plurality of drive elements further having a plurality of reciprocating print needles, wires or styli, includes additionally a fastening structure for each o... | 12/29/1992 |
| 5163763 | Dot matrix print head armature An impact printing apparatus includes an armature and print wire assembly in which a plastic arm is injection molded to interact with recesses in an armature and to surround a portion of a print wire to provide a rigid interconnection between the armature... | 11/17/1992 |
| 5137381 | Matrix pin print head In a matrix pin print head, the armatures (15a) of the magnet drive (12), transferring the advance motions to the print pin, rest in each case against the print pin (4). The print pin (4) and the print pin head (22) form a rigid connection. In order to re... | 08/11/1992 |
| 4974975 | Armature of printing head for use in wire printer An armature device of a printing head for use in a wire printer includes stylus having a free end to strike a recording medium, an armature connected to the stylus for reciprocating the stylus in a longitudinal direction thereof, a permanent magnet for ge... | 12/04/1990 |
| 4962876 | Method of producing a movable part of a wire-dot print head In a method of producing a movable part of a wire-dot print head comprising an armature supported by a plate spring, and a lever having a tip to which print wire is fixed, the armature and the lever are formed of alloys containing identical atoms or alloy... | 10/16/1990 |
| 4828409 | Print head A print head for a dot matrix printer comprises a housing (1) containing a number of actuators (2) driving a corresponding number of print wires (6). Each actuator (2) includes an actuating coil (11) wound around a yoke (10) fixed to the housing (1) and a... | 05/09/1989 |
| 4687354 | Dot matrix printer head A reduced size and power dot matrix printing head having a chair shaped yoke with opposed off-set portions. Electromagnets are secured to the inner sides of the opposed off-set portions of the yoke permitting staggering of the electromagnets. Heavy biasin... | 08/18/1987 |
| 4576491 | Printing head A printing head for printing dot-shaped records on a recording medium includes a plurality of electromagnets, armatures operated by the electromagnets to depress a plurality of depressing members so that the depressing members are moved linearly, and a re... | 03/18/1986 |
| 4569605 | Wire driving armature for dot printer The multi-wire dot print head is provided with a plurality of print wires with a wire driving armature associated with each of the print wires and being operable to move the print wire toward a print position. The wire driving armatures each include an ac... | 02/11/1986 |
| 4569604 | Printing head apparatus and manufacturing method A printing head apparatus for impact dot printing and a method for manufacturing the apparatus, wherein those portions of the armature, printing wire and collar which are to be held in contact with each other and those other portions thereof which are to ... | 02/11/1986 |
| 4552064 | Dot matrix printers and print heads therefor Several new print heads are disclosed for use in serial and line printers. The print head is of the solenoid operated type without stored energy magnets and has a very low mass armature beam which the solenoid specifications are matched for performance at... | 11/12/1985 |
| 4544288 | Impact dot printing head An improved impact dot printing head in which a printing needle is secured more firmly to an armature than ever, particularly they are secured or soldered to each other at their mating portions by way of a solder material selected from nickel and nickel a... | 10/01/1985 |
| 4524259 | Print hammer assembly method The impact pins of a matrix printhead are brazed by a laser to a print hammer of the flat spring type. The print hammers are then attached to a printhead mounting block adjacent to each other with the impact pins in substantially a straight line. The atta... | 06/18/1985 |
| 4478528 | Wire matrix print head assembly 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... | 10/23/1984 |
| 4437775 | Dot printer head 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 ... | 03/20/1984 |
| 4423969 | Print head 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 a... | 01/03/1984 |
| 4394093 | Support means for print wire 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 p... | 07/19/1983 |
| 4317635 | Matrix printing head 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 ... | 03/02/1982 |
| 4307966 | Printer wire for printer wire assembly, assembly and method for producing same Printer wire assemblies for dot matrix printers are characterized by a copper layer on the tungsten wire extending beyond the base portion inside the pin socket, to protect the wire from the embrittling effects of brazing, by braze-forming layers on the c... | 12/29/1981 |
| 4256948 | Integral beaded stylus wire and method of making same A stylus wire for use in a matrix printhead includes a thin elongated wire with an integral sphere-like head formed at one end. Also disclosed is a method of forming the sphere-like head using a laser or other device to apply high localized heat to the wi... | 03/17/1981 |
| 4252449 | Construction of wire type dot printer head In a wire type dot printer head a flat lever pivots on a fulcrum when attracted by an electro-magnetic coil. Pivoting of the lever on the fulcrum drives a print wire or needle, in opposition to a biasing spring, against an ink ribbon and paper for printin... | 02/24/1981 |
| 4242004 | Dot matrix printhead driver A driver mechanism for a dot matrix printhead, including an electromagnet, an armature, and a print impact element connected to the armature by a cantilever spring, energization of the electromagnet and consequent movement of the armature to closed positi... | 12/30/1980 |
| 4166314 | Magnetically actuated needle printing head and method of manufacture A magnetically actuated printing needle of the type used in mosaic needle printing heads having printing needles moved by an axially movable armature connected to the needle is disclosed wherein the needle is provided with an armature received portion hav... | 09/04/1979 |
| 4000801 | Print wire attachment 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 eliminate... | 01/04/1977 |
| 3973661 | Wire-matrix printers, and electromagnetic actuator mechanisms useful in such printers A wire-matrix printer including a vertical column of essentially horizontal, generally parallel print wires arranged for substantially linear reciprocation along spaced, parallel printing axes. The print wires are of progressively varying length so that t... | 08/10/1976 |
