Patents Represented by Attorney, Agent or Law Firm Barbara Joan Haushalter
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Patent number: 5801734Abstract: A continuous linear array ink jet apparatus deposits a predetermined amount of printing fluid of at least one color onto a linear array of pixels at high resolution. The continuous ink jet system includes a linear array of orifices fluidically connected to a fluid supply, for producing a linear array of jets. The jets are stimulated for regular break-up of each jet into a plurality of uniform streams of drops. A linear array of planar conducting elements, disposed along a path of motion of the array of jets, deflects the print drops into at least two print positions. The linear array of planar conducting elements is situated at a predefined angle with the motion of the print medium so that the resolution of the print system is substantially higher than the number of jets per inch along the array.Type: GrantFiled: December 22, 1995Date of Patent: September 1, 1998Assignee: Scitex Digital Printing, Inc.Inventor: John M. Schneider
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Patent number: 5794483Abstract: A fin forming device folds fin material into a plurality of corrugations by creating a fold radius at each fold. The device comprises a substantially rectangular plane of metal having a front side, and an opposing back side. The perimeter of the plane is defined by a top edge which is applied to the fin material to form the fold radius, a bottom edge, and a pair of opposing side edges. Initially, each of the edges has a substantially similar thickness. An angled surface is created on at least one side of the plane, commencing in an interior area of the plane below the top edge of the plane and terminating at the top edge of the plane. This creates an angled blade surface along at least a portion of the top edge of the plane. The angled blade surface has a narrower thickness than the initial edge thickness.Type: GrantFiled: September 25, 1996Date of Patent: August 18, 1998Assignee: Robinson Fin Machines, Inc.Inventors: Mark F. Haushalter, David L. Haushalter
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Patent number: 5754206Abstract: A mounting apparatus holds in position a droplet generator assembly to be mounted in a continuous ink jet printing system. The droplet generator assembly comprises a pair of conical slots and a pair of conical apertures, located on opposing sides of the droplet generator. A resonator clamping plate includes a plurality of mating protrusions. A resonator support includes a plurality of spherical protrusions. A holding force, such as a screw, securely holds the assembled structure. The clamp and support interact with the conical slots and apertures to locate and exactly constrain the droplet generator. With the mounting structure of the present invention, the six degrees of freedom of adjustment are controlled.Type: GrantFiled: February 23, 1996Date of Patent: May 19, 1998Assignee: Scitex Digital Printing, Inc.Inventors: Bruce A. Bowling, David J. Stephens
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Patent number: 5739829Abstract: A fluid flow detection method is used in a continuous ink jet printer which generates a row of parallel selectively charged drop streams from a fluid system. In the fluid flow detection method, a low airflow catcher device is provided for establishing bubble flow in an associated catcher vacuum port and catcher return line. The catcher return line contains catcher return fluid. Pressure fluctuations are monitored in the catcher return fluid to the ink tank, the ink tank having a tank vacuum. The tank vacuum is automatically lowered to a preset value, which preset value is greater than bubble flow transition. The tank vacuum is then incrementally lowered as pressure fluctuations are monitored. The tank vacuum is maintained at a constant level when the pressure fluctuations decrease below a predetermined level due to the establishment of bubble flow.Type: GrantFiled: April 30, 1996Date of Patent: April 14, 1998Assignee: Scitex Digital Printing, Inc.Inventor: John C. Loyd
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Patent number: 5730789Abstract: An ink jet ink composition comprises a liquid vehicle, a dye, a hydroxyalkylated polyethyleneimine, and an ammonium salt for enhancement of waterfastness. The ammonium salt preferably comprises less than 1% by weight of the ink composition, and is added to a combination of the dye and ethoxylated polyethyleneimine. The ink jet ink composition increases the waterfastness of the ink to a level greater than 85%.Type: GrantFiled: July 29, 1996Date of Patent: March 24, 1998Assignee: Scitex Digital Printing, Inc.Inventor: Raouf Botros
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Patent number: 5722145Abstract: A quick change device is adaptable for use on a reciprocating press fin machine which continuously forms a metal sheet into sinuous or corrugated configuration by using tools associated with upper and lower opposed, metal-engaging tools, each movable toward and away from the other in a vertical forming stroke, and a first one of these tools also being movable in a variable stroke transverse to its vertical forming stroke. Wedge-shaped abutment elements and associated block elements having a wedge-shaped cavity therein adapted to receive the abutment elements, establish the length of transverse motion of the first tool. A structure is used to simulate the reciprocating press fin machine. A reader assembly digitally analyzes movement of the wedge-shaped abutment elements to set the transverse stroke length, based on the simulation provided by the structure, to allow precise alignment of the tools in the reciprocating press fin machine.Type: GrantFiled: July 16, 1996Date of Patent: March 3, 1998Assignee: Robinson Fin Machines, Inc.Inventors: David L. Haushalter, Mark F. Haushalter, Philip D. Lowe
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Patent number: 5683187Abstract: A platen assembly is provided for use with a printing system which uses ink jet technology to produce images on a substrate. A platen and the substrate move together as a unit. One or more print rollers deflect the substrate under tension to maintain a stable substrate, critical for maintaining print quality. A pivot point is provided from which the rollers can be cantilevered away. A lifting mechanism is then used to raise and lower the platen and the substrate to and away from a print position.Type: GrantFiled: June 18, 1996Date of Patent: November 4, 1997Assignee: Scitex Digital Printing, Inc.Inventor: David F. Tunmore
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Patent number: 5676744Abstract: An ink jet ink composition comprises a liquid vehicle, a pigment, a pH adjusting component, and a chemical with a plurality of electron donating groups. The chemical with a plurality of electron donating groups comprises a chemical with at least three electron donating groups, wherein the at least three electron donating groups are situated in close proximity to provide high dried film resistivity. With the present invention, significant improvement in dried film resistivity of carbon pigment ink jet inks is achieved, sufficient to eliminate charge lead to charge lead shorts and improve machine runnability and can, therefore, be used in ink jet printers.Type: GrantFiled: November 6, 1996Date of Patent: October 14, 1997Assignee: Scitex Digital Printing, Inc.Inventors: Sharad R. Thakkar, Rodney G. Mader, Raouf Botros
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Patent number: 5624485Abstract: An ink jet ink composition comprises a water soluble polymer, a cosolvent, a water soluble dye, a surfactant, and water as a primary vehicle. The water soluble polymer, the cosolvent, and the surfactant are all present in extremely low amounts. The water soluble polymer is present in a range of from about 0.05 to 0.10%; the cosolvent, or glycol ether blend, is present in a range of from about 0.10 to 2.00%; and the surfactant is present in a range of from about 0.01 to 0.10%.Type: GrantFiled: September 8, 1995Date of Patent: April 29, 1997Assignee: Scitex Digital Printing, Inc.Inventor: Larry G. Calhoun
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Patent number: 5618046Abstract: A piston ring assembly comprises a piston ring, a spring for providing an outward force on the ring, and a rail for engaging a cylinder wall. The piston ring is retained in a piston groove in a piston. During upward movement of the piston in a cylinder, oil above the ring face is forced between the first front surface and the top surface into the piston groove to an inner portion of the piston groove. During downward movement of the piston, the downward force urges cocking of the piston ring about the ring face to tilt the ring face away from the cylinder wall, leaving the lower front of the ring face in scraping abutment with the cylinder wall.Type: GrantFiled: March 15, 1993Date of Patent: April 8, 1997Assignee: Dana CorporationInventor: John D. Binford
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Patent number: 5601639Abstract: An ink jet ink composition comprises a liquid vehicle, a single dye component, a surfactant and a glycol. The dye is water soluble and selected from the group consisting of Direct Dyes, Acid Dyes and Food Dyes, and preferably from the group consisting of Direct Yellow 86, Acid Red 249, Acid Red 92 and Direct Blue 199. Concentration of the dye is preferably in the range of 1% to 2% by weight. Using the ink composition of the present invention, images are generated by a continuous stream digital color press ink jet printing apparatus. In a preferred embodiment, to optimize runnability and jet straightness, the digital color press employs a gold orifice plate having an orifice diameter in the range of 0.7 to 0.8 mil.Type: GrantFiled: May 4, 1995Date of Patent: February 11, 1997Assignee: Scitex Digital Printing, Inc.Inventors: Shiow-Meei L. Myers, Hilarion Braun, Larry G. Calhoun, Bipin G. Bhatt, Eric J. Stevenson
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Patent number: 5526026Abstract: A continuous ink jet printer employing conductive ink and having a main ink supply, a supplemental ink supply, and a replenishment carrier fluid supply includes a fluid system that replenishes ink or carrier fluid based on the resistivity of ink in the main ink supply.Type: GrantFiled: March 17, 1994Date of Patent: June 11, 1996Assignee: Scitex Digital Printing, Inc.Inventor: Mark C. Bowers
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Patent number: 5512089Abstract: An ink jet ink composition comprises a liquid vehicle, a pigment, and a base for raising the pH of the system. The problem to be addressed for pigmented inks is how to achieve excellent ink redispersibility within a short time period, usually within 1-2 minutes, without any mechanical agitation. With the present invention, dried ink redispersibility/charge plate deposit redispersibility of aqueous pigmented ink is improved by raising the pH of the ink, for example, between 9 and 12. The time required for dried ink redispersibility is then reduced from greater than 10 minutes to an acceptable 1-2 minutes. The present invention results in significant improvement in machine runnability and can, therefore, be used in ink jet printers.Type: GrantFiled: August 23, 1994Date of Patent: April 30, 1996Assignee: Scitex Digital Printing, Inc.Inventor: Sharad R. Thakkar
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Patent number: 5512117Abstract: A charge plate fabrication process provides a charge plate assembly having minimal distortion caused by shifts in temperature and humidity. The fabrication process includes the steps of forming a charge plate coupon having a plurality of charging electrodes and electrical connections on an etchable substrate and providing a ceramic charge plate substrate. An adhesive layer is then applied between the charge plate coupon and the charge plate substrate before assembling the charge plate coupon and the charge plate substrate in a fixture. Finally, the assembly is cured in the fixture.Type: GrantFiled: April 18, 1994Date of Patent: April 30, 1996Assignee: Scitex Digital Printing, Inc.Inventor: Brian G. Morris
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Patent number: 5502474Abstract: A print pulse phase control system for a continuous ink jet printer determines whether to charge ink droplets for recirculating, or not to charge ink drops for printing. The system includes a drop generator which receives a drive signal and generates a feedback signal. Print pulses are then produced at a fixed phase relative to the feedback signal for controlling drop charging.Type: GrantFiled: March 27, 1992Date of Patent: March 26, 1996Assignee: Scitex Digital Printing, Inc.Inventors: James A. Katerberg, Randy L. Fagerquist
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Patent number: 5498283Abstract: An ink jet ink composition comprises a security component, a liquid vehicle, a dye, and an N-hydroxyalkyl imine substituted at about 80% of the available nitrogens. The security component in this ink jet composition causes the ink to maintain color when subjected to bleach to prevent alteration of a printed document, and can be used in ink jet printers.Type: GrantFiled: August 23, 1994Date of Patent: March 12, 1996Assignee: Scitex Digital Printing, Inc.Inventors: Raouf Botros, Sunita Chavan
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Patent number: 5477256Abstract: A vacuum system solves the heretofore unknown problem of mist generation from an ink reservoir under vacuum. The vacuum system includes an ink reservoir and a vacuum pump for supplying vacuum to the ink reservoir. A mist filter is housed in a housing associated with the vacuum system for capturing ink mist from the ink reservoir.Type: GrantFiled: March 27, 1992Date of Patent: December 19, 1995Assignee: Scitex Digital Printing, Inc.Inventors: John C. Loyd, Russell L. Bartley
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Patent number: 5477254Abstract: An apparatus and method allows for mounting and aligning of the charge plate/catcher assembly and the droplet generator within the structure that holds these two parts. Three degrees of freedom of adjustment are incorporated into the frame and are self-locking. Two of the degrees of freedom are the positioning distance of a jet array to charge leads and the parallelism of the jet array to the charge leads. The third degree of freedom is the ability to adjust the jet array so as to align and center the jets in front of the charge leads.Type: GrantFiled: March 30, 1992Date of Patent: December 19, 1995Assignee: Scitex Digital Printing, Inc.Inventor: David J. Stephens
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Patent number: 5475409Abstract: An apparatus and method allows for mounting and aligning of the charge plate/catcher assembly and the droplet generator and has six degrees of freedom of adjustment, including three degrees of freedom of translation and three degrees of freedom of rotation. A first degree of freedom of translation comprises a height adjustment of the resonator relative to the charge plate; a second degree of freedom of translation comprises an alignment adjustment for aligning the plurality of jets with respect to the plurality of charge leads; and a third degree of freedom of translation comprises a reciprocal adjustment for moving the plurality of jets relative to the charge plate.Type: GrantFiled: May 29, 1992Date of Patent: December 12, 1995Assignee: Scitex Digital Printing, Inc.Inventors: Robert J. Simon, Gary L. Strain
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Patent number: 5475410Abstract: An ink jet printer includes an ink jet printhead having a drop generator and an ink drop charging and catching assembly. An elastomeric seal mounted on a lever arm about a pivot remote from the charging and catching assembly seals the ink drop generator and charging and catching assembly when the ink jet printer is not in use.Type: GrantFiled: March 19, 1992Date of Patent: December 12, 1995Assignee: Scitex Digital Printing, Inc.Inventors: Homer D. Durst, David J. Stephens