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| Number | Title | Issue Date |
| 5684516 | Print station in an ink jet printer A serial drop-on-demand ink jet printer having an ink cartridge mounted for reciprocation on a carrier which traverses paper advancing through the printer. The cartridge includes a nozzle array for the ejection of ink droplets onto the paper, and the carr... | 11/04/1997 |
| 5631746 | High resolution simulation printing by printing adjoining pels Printer (1) having the capability of printing at 600×2400 dpi resolution simulates 1200×1200 dpi resolution by logically examining two lines of a 1200×1200 bit map and printing identically when possible and half black when only one of the two verticall... | 05/20/1997 |
| 5598251 | Concentration sensing by viscosity measurement In a liquid toner chamber (2) of a copier or printer a top plate (5) is moved upward and allowed to fall. The capacitance between the plates is used to define their separation and the time for the plates to move between predetermined locations is used to ... | 01/28/1997 |
| 5577243 | Reallocation of returned memory blocks sorted in predetermined sizes and addressed by pointer addresses in a free memory list In an electronic data processing apparatus blocks of returned memory 3 are linked by address pointers starting with a pointer in a table 1. Each pointer in the table 1 points to memory of within a predetermined size range varying by integral powers of 2. ... | 11/19/1996 |
| 5571650 | Organic positive photoconductor A positive charging photoconductor of, preferably, 4 to 8 percent by weight metal-free phthalocyanine, 30-50 percent by weight tritolylamine and the remainder polyvinylbutyral.... | 11/05/1996 |
| 5563637 | Maintenance station for ink jet printhead A maintenance station for an ink jet printer comprises two modules supported from the printer middle frame by a tongue and groove arrangement and secured in place only by retaining elements integrally formed with the middle frame. The first module include... | 10/08/1996 |
| 5562876 | Method of maintaining a low residue open-cell felted foam Open-Cell urethane foam is thoroughly dried in a convection oven or controlled atmosphere and then compressed with heat to a felt immediately. Alternatively, the dried foam is sealed in a plastic bag until the felting step. The amount of non-volatile resi... | 10/08/1996 |
| 5562762 | Jet ink with amine surfactant An aqueous jet ink of water, dissolved dyes and a surfactant of R--N(C2 H4 O)x (C2 H4 O)y H, where x+y is from 5 to 25, with x and y each at least 2, and R is alkyl or oxygen containing. Th... | 10/08/1996 |
| 5561528 | Forms on demand printing Printer (1) is provided with a mode to print forms without reference to or interruption of a host computer and with immediate printing of one or more of the forms. Page data for the forms is stored in flash memory (21) in a high level printer language. At... | 10/01/1996 |
| 5550957 | Multiple virtual printer network interface Multiple host computers on a network are connected through an interface, or network adapter, to a printer having a printer controller capable of bi-directional communication with the computers on the network. The interface communicates with the network co... | 08/27/1996 |
| 5545499 | Electrophotographic photoconductor having improved cycling stability and oil resistance A photoconductor for use in electrophotographic reproduction devices is disclosed. This photoconductor exhibits improved oil resistance when used with liquid toners and excellent cycling stability. The photoconductors of the present invention utilize a ph... | 08/13/1996 |
| 5527026 | Auto compensating paper feeder A gear train (1) pivoted (11) around its drive gear (3) rotates a drive roller (13) with increasing pressure until the top sheet of paper (15) is moved. The corner buckler (19) is moved around a pivot (25) under the paper tray to drive the buckler into th... | 06/18/1996 |
| 5526468 | Method and apparatus for smoothing an expanded bitmap for two-state image data A method for smoothing expanded bitmap data is provided for use in laser printers or computers that use two-state, two-dimensional image data created by word processors, computer-aided drafting systems, and the like. The method would typically be utilized... | 06/11/1996 |
| 5526097 | Cartridge utilizing a plurality of contact charging members Cartridge (1) contains a brush charger (32) and printer (40) contains a charge roller (30). Upon installation of the cartridge a top shutter (7) is moved downward and the charge roller is moved by a pivoted arm (44) through the opening left by the shutter... | 06/11/1996 |
| 5525979 | Low configuration keyboard A low-profile keyboard (5) each switch (3) having a dished keybutton (3) held upward by a rubber dome (49) and having ribs (55) which depress extension (43 and 31) which carry electrical traces (45 and 33) to activate the switch. The assembly is mounted o... | 06/11/1996 |
| 5521596 | Analog input device located in the primary typing area of a keyboard A sensor device is placed either underneath a key cap of a key on a keyboard or in between two keys on a keyboard so that cursor movement may be carried out from the keyboard itself. If the sensor device is placed underneath a key cap, then the key cap is... | 05/28/1996 |
| 5512408 | Dry toner with gelled resin for high speed printer A toner for a two component developer used in a high speed computer output printer has about 20 parts gelled styrene/acrylic resin, 40 parts acrylate resin, about 13 parts hydrogenated wood rosin ester with pentaerythritol, and about 18 parts rosin ester ... | 04/30/1996 |
| 5510820 | Device for ink refill of a reservoir in a print cartridge An ink refill device includes a body having a chamber with ink therein. The chamber has one wall formed of a frangible material. The body has a needle communicating the chamber with a reservoir, which has a foam of a controlled porosity therein, in a prin... | 04/23/1996 |
| 5502797 | Apparatus with flash memory control for revision Printer (1) receives revised operating code in flash memory (19). To preserve offset adjustment unique to the printer, the values in new operating code are compared with those in the previous code, and new offsets preserving the previous offsets are store... | 03/26/1996 |
| 5500724 | Photoconductor for abrasion in liquid systems In a liquid toner electrophotographic printer (1), an abrasive blade (5), located between the cleaning station (19) and the charging station (9) disturbs the outer, photoconductive surface of drum (3) to continuously rejuvenate that surface. The abrasion ... | 03/19/1996 |
| 5497178 | Multicolor liquid ink jet print head A multicolor liquid ink jet print head including a print head body containing liquid ink and having a nozzle assembly and electrical connections to the nozzle assembly. The print head body defines passageways to couple the ink from ink chambers in the pri... | 03/05/1996 |
| 5494507 | Dye having hydrophobic substituent and aqueous ink A dye having a representative formula as follows and an ink providing waterfast printing having the dye, in which a surfactant is not essential: ##STR1##... | 02/27/1996 |
| 5494277 | Universal paper feed A printer (1) has paper feed pinch rollers (21, 23 and 25, 27) with their backup rollers canted 5 degrees toward reference guide surface (19). Preceding idler roller (15) is also canted 1.5 degrees toward the guide surface. A sheet (3) fed by D roller (11... | 02/27/1996 |
| 5493320 | Ink jet printing nozzle array bonded to a polymer ink barrier layer In a print head for ink jet printing a nozzle plate with a nozzle array is gold plated. The gold plated nozzle array is bonded to the polymer ink barrier layer on an electronic chip by a thin layer of tantalum, zirconium, titanium or silicon dioxide. The ... | 02/20/1996 |
| 5492977 | Preparation of amino terminated polyacrylics Amino terminated polyacrylic acids and polyacrylic acrylates are prepared by free radical polymerization of the acid or acrylate monomers with t-Boc-aminoethanethiol as a chain transfer control agent followed by acid removal of the t-Boc group. The acids ... | 02/20/1996 |
| 5488627 | Spread spectrum clock generator and associated method A clock circuit includes an oscillator for generating a reference frequency signal, and a spread spectrum clock generator cooperating with the oscillator for generating a spread spectrum clock output signal having a fundamental frequency and reduced ampli... | 01/30/1996 |
| 5480240 | Print quality enhancement method and apparatus A print quality enhancement arrangement for a dot matrix printer such as a thermal ink jet printer. The arrangement includes a buffer for receiving 300 dots per inch (dpi) resolution data in the horizontal (print head movement) direction and creates 600 d... | 01/02/1996 |
| 5471291 | Color imaging with contact transfer heating station In imaging apparatus (1) a contact heater (9) applies heat and electrical bias to a toner image on an intermediate accumulator (5). The bias is of polarity to repel the toner. The toner image is coalesced such that additional heating may be reduced or eli... | 11/28/1995 |
| 5469247 | Toned member cleaning by electrified roller Cleaning roller (7) contacts intermediate transfer roller (4), each rotating at the same surface speed to avoid rubbing. The cleaning roller has an electric potential sufficient to remove toner from the transfer roller to clean it. Silicone oil is applied... | 11/21/1995 |
| 5467108 | Adjustable pointing stick assembly A pointing stick, which is used to control the position of a cursor on a computer monitor, has its axial longitudinal position relative to its fixed cover adjusted so that a flat bottom surface of a pad on the bottom of the pointing stick does not exert a... | 11/14/1995 |
| 5465107 | Printhead drive system for serial printer The printhead of an ink jet printer is mounted on a printhead carrier for reciprocal movement on a carrier guide rod above a record feed path. A bi-directional motor drives a drive belt attached to the carrier to thereby pull the printhead back and forth.... | 11/07/1995 |
| 5457002 | Carrier fluid for liquid electrophotographic toner Trimers of C9 to C11 alpha olefins are useful as carrier fluid in liquid toner for electrophotography. Their use practically eliminates air pollution, oil slicks when liquid toned prints are placed on a surface and a halo effect.... | 10/10/1995 |
| 5454652 | Adjustable keyboard A keyboard has two segments connected to each other at their rear ends by a connector. The two segments can be pivoted about the connector through 90° in the plane of a support surface for the keyboard. In one embodiment, each keyboard segment may be dis... | 10/03/1995 |
| 5450114 | Accumulator roller synchronization with image size adjustment During manufacture of each printer (1) image size is corrected while close registration with the optical system (3) is assured by varying the pulses to a stepper motor driving accumulator roller (5). The length of an image printed using the optical sweep ... | 09/12/1995 |
| 5436708 | High stability color imaging by transfer roller A printer or other imaging apparatus (1) in which two or more images in registration are transferred from a photoconductor (3) to an intermediate transfer drum (5). The transfer drum has very stable resistivity, which is achieved by the body of the drum b... | 07/25/1995 |
| 5432036 | Liquid electrostatic toners with terpolymer resin A liquid toner for electrostatic imaging having 65-90 percent by weight of solids of terpolymer of about in the weight ratio of about 60/33/7 of styrene, n-butyl acrylate and methacrylic acid, respectively; 10-30 percent by weight of solid of pigment, an ... | 07/11/1995 |
| 5430533 | Polymeric toner transfer member material An electrophotographic printer employs a intermediate transfer roller of a copolymer of urethane and silicone carbinol. Transfer efficiency is excellent over a period normally coinciding with the full life of a printer or other imaging device.... | 07/04/1995 |
| 5412459 | Imaging apparatus with paper preconditioning for transfer In an electrostatic printer (1) paper (11) is first conditioned by being thoroughly dried by rollers (13 and 15), which also immobilize the paper so that it does not wrinkle. The paper is then kept hot on flat plate 17 before it moves into the transfer ni... | 05/02/1995 |
| 5406356 | Liquid toner imaging with contact charging An electrophotographic device (1) in which a photoconductor drum (3) is charged by a charging roller (5). Insulating liquid (19, 30) is applied at their initial nip. The charging roller both charges and squeegees largely dry the photoconductor member. The... | 04/11/1995 |
| 5400067 | Foam insertion for an ink jet print head cartridge A method and apparatus for inserting a compressed foam block into a generally rectangular ink jet print head ink chamber. The foam is compressed in an insertion tool which includes a compression area and compression fingers extending therefrom. A block of... | 03/21/1995 |
