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| Number | Title | Issue Date |
| 7373346 | Methods and apparatus for improved security services An apparatus and method for providing and/or obtaining security services includes a database of information which relates to security services provided for at least one client. A computer that is Internet accessible hosts the database. The database includes security... | 05/13/2008 |
| 7329363 | Method of forming a hydrophobic coating layer on a surface of a nozzle plate for an ink-jet printhead A method of forming a hydrophobic coating layer on a surface of a nozzle plate for an ink-jet printhead includes preparing a nozzle plate having a nozzle, forming a metal layer on a surface of the nozzle plate, forming a material layer covering the metal layer, sele... | 02/12/2008 |
| 7158159 | Micro-machined nozzles A micro-machined nozzle includes a substrate having a hole formed on a first side that extends partially through a thickness dimension of the substrate and a nozzle orifice formed on a second opposite side that communicates with the hole. The nozzle orifice has at l... | 01/02/2007 |
| 6935724 | Ink jet nozzle having actuator with anchor positioned between nozzle chamber and actuator connection point A nozzle arrangement having a nozzle camber for holding ink. A passive anchor and an active anchor extend from respective anchor points and support a moveable structure including a portion in fluid communication with the ink chamber. The moveable structure is connec... | 08/30/2005 |
| 4839001 | Orifice plate and method of fabrication An orifice plate and method of fabrication are provided in which the plate is constructed of two electroformed layers of metal. Onto a conductive mandrel a first layer of a first metal is electroformed to provide a support layer having a selected hole pat... | 06/13/1989 |
| 4837584 | Security time clock system System for requiring the contemporaneous application of time clock data and personal data to a time card to prevent or signal the fraudulent application of either type of data at a time which is substantially different from the other type of data, i.e., b... | 06/06/1989 |
| 4746935 | Multitone ink jet printer and method of operation This patent application discloses a method and apparatus useful for eight-level halftone thermal ink jet printing by printing with droplets of ink with volumes weighted in a binary sequence. Three (3) binary-weighted drop generators which are fired in seq... | 05/24/1988 |
| 4714936 | Ink jet printer A rotary ink jet printer can print at high speed in black and white as well as in color using hot-melt inks. The printer includes a rotary print wheel which supports a plurality of ink jetters distributed around its periphery. The jetters are divided into... | 12/22/1987 |
| 4685185 | Method of manufacturing an ink jet head An aperture plate for an ink jet head is formed by micro electrical discharge machining one surface of the plate to form a dimple-like recess with a relatively wide flat base. An aperture is then formed through the plate in the region of the dimple, as by... | 08/11/1987 |
| 4564846 | Drop on demand dot matrix printing head A drop-on-demand printer system has a print head including a manifold plate and one nozzle plate for each desired printing nozzle array. The manifold plate carries dot valves each controlling the flow of ink to one nozzle of each array. Ink passed by each... | 01/14/1986 |
| 4523070 | Low profile food rotator A mechanically-driven, low-profile, portable turntable for use in cooking ovens, especially microwave ovens, for rotating food stuffs while cooking. All moving parts, except the power spring used to drive the turntable are formed from low loss plastic and... | 06/11/1985 |
| 4514729 | Environmental control system and method An environmental control system includes sensors in a room for sensing the environment and a sensor which may be a sound sensor, for detecting the presence or absence of a person in the room. With the aid of a digital computer, the presence or absence of ... | 04/30/1985 |
| 4455192 | Formation of a multi-nozzle ink jet A method for the formation of a multi-nozzle ink jet is herein disclosed. In this method a single crystal silicon plate is masked and impurities are diffused upon its surface, creating regions of echant resistance. A second single crystal silicon plate is... | 06/19/1984 |
| 4450455 | Ink jet head An ink jet head comprises an orifice plate constituted of a hardened film of a photosensitive resin having an orifice which extends therethrough in the direction of its thickness.... | 05/22/1984 |
| 4449135 | Ink ejection head An ink ejection head having a body and a nozzle member which is mounted on the head body through a nozzle holder. To facilitate the ease of machining, the nozzle member is formed with a generally cup-shaped recess first and then a nozzle hole for ejecting... | 05/15/1984 |
| 4429317 | Ink ejection head An ink ejection head including a nozzle holding member having an ink ejection nozzle threadably connected to a forward end portion of a liquid chamber structure. The ink ejection heads further includes a sealing member, such as a packing or an O-ring, loc... | 01/31/1984 |
| 4425777 | Method of and device for manufacturing a jet nozzle plate for ink jet printers To manufacture a jet nozzle, the nozzle plate is first drawn through a drawing ring of spring steel in one operation by a press and punch die having the internal dimensions of the jet nozzle, the plate subsequently being punched during further drawing in ... | 01/17/1984 |
| 4417251 | Ink jet head Ink jet head and method for manufacturing the same, wherein a groove or grooves to constitute ink flow path are formed in a layer of a photosensitive composition placed on one surface of a substrate.... | 11/22/1983 |
| 4415909 | Multiple nozzle ink jet print head An ink jet printer has an arrangement of nozzles in a symmetrical pattern and formed by tubular ink channels with cylindrical piezoelectric crystal or like transducers surrounding the tubular channels. The arrangement of nozzles is contained in a small an... | 11/15/1983 |
| 4409602 | Mosaic recorder with improved nozzle structure A mosaic recorder having a plurality of nozzles for ejecting recording liquid droplets on a moving recording medium for punctiform representation of characters and images, each nozzle having a piezoelectric transducer associated therewith and said nozzles... | 10/11/1983 |
| 4403234 | Ink jet printing head utilizing pressure and potential gradients An ink jet printing head comprises laminar airflow chamber having a front channel through which a combined stream of air and ink droplets is discharged toward a writing surface, and a rear channel axially aligned with the front channel connected to a sour... | 09/06/1983 |
| 4396924 | Recording head for ink mosaic printers A recording head for ink mosaic printers has a plurality of channels communicating with an ink supply each of which has an individually controllable electro-mechanical transducer operable to eject ink droplets from respective channels and each channel fur... | 08/02/1983 |
| 4394670 | Ink jet head and method for fabrication thereof An ink jet head comprises an ink flow path formed by laminating cured films or photosensitive compositions and an ink discharging orifice, at least the ink discharging orifice region being composed of the cured films. A method for fabrication of an ink-je... | 07/19/1983 |
| 4389654 | Ink jet droplet generator fabrication method A method for fabricating an ink jet droplet generator. According to the disclosed technique, a metallic body is first machined to define one or more ink receiving cavities and to further define an intended nozzle surface. Resist material is applied to the... | 06/21/1983 |
| 4380018 | Ink droplet projecting device and an ink jet printer An on-demand type ink jet printer, and an ink droplet projecting device used in this printer are disclosed. This device operates in the following way: a piezo-electric element transmits the pressure generated by its vibration first to the pressure transmi... | 04/12/1983 |
| 4378564 | Ink jet printing apparatus and process An ink jet printing apparatus is shown which has a source of pressurized ink connected to a plurality of solenoid valves. Each valve has an input port in fluid communication with the pressurized ink source and an output port. A plurality of jeweled orific... | 03/29/1983 |
| 4374707 | Orifice plate for ink jet printing machines An orifice plate for use in ink jet printing machines is produced by an electroplating technique. The plate is bilaminar with nickel being plated onto copper to form a substantially rigid structure.... | 02/22/1983 |
| 4375066 | IJP Drop modulator An adjustable frequency Ink Jet Gun utilizing a variable ink chamber and replaceable orifice may be used in a wide variety of applications.... | 02/22/1983 |
| 4368477 | Arrangement for a printing head in ink mosaic printing devices A printing head for an ink mosaic printing device is provided with a plurality of diagonally extending ink ducts having downstream ends converging at a printing location on the printing head to form a printing grid pattern. The downstream leading ends of ... | 01/11/1983 |
| 4364059 | Ink jet printing apparatus Ink is recirculated from a reservoir (624) through an ink ejection head (100) and back to the reservoir (624) while it is being heated prior to actual printing to purge air from the ink and prevent erroneous ejection. The heat (100) has a nozzle assembly ... | 12/14/1982 |
| 4340879 | Personnel in and out indicator A personnel in and out indicator device which is programmable with information regarding the in or out status and time of arrival or departure of employees at a location. The device consists of a frame on which are mounted a series of manually operable pe... | 07/20/1982 |
| 4308546 | Ink jet tip assembly An ink jet tip assembly in which the individual jets are comprised of a piezoelectric cylinder having a longitudinally through bore, a glass ink nozzle disposed in the cylinder bore and a low melting temperature alloy interposed between the bore and the n... | 12/29/1981 |
| 4227199 | Method and device for time-recording A double check or safety system for recording information of two types on a record sheet, such as a time clock card. One type of information is applied automatically to a first predetermined area of the record sheet when the sheet is inserted into a machi... | 10/07/1980 |
| 4131899 | Droplet generator for an ink jet printer An ink jet printer having a piezoelectric capillary injector-type droplet generator. The droplet generator includes an integral body having formed within it a single chamber that receives and holds ink under capillary action. A nozzle defined by one or mo... | 12/26/1978 |
| 4110759 | Orifice plate holder for a fluid jet printing apparatus An orifice plate holder for use in the printing head of a jet drop printing apparatus which uses an orifice plate stimulated with a traveling wave to produce uniformly spaced drops of fluid for printing. The holder has at least one built in dampening devi... | 08/29/1978 |
