Patents by Inventor Amir Ofir
Amir Ofir has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10895828Abstract: A printing device includes a print blanket to transfer an ink image onto print media on an impression drum. Responsive to receiving a null cycle trigger during printing, the impression drum is repositioned to a null position to reduce contact between a print blanket and the impression drum.Type: GrantFiled: August 31, 2018Date of Patent: January 19, 2021Assignee: HP Indigo B.V.Inventors: Vitaly Portnoy, Michel Assenheimer, Amiran Lavon, Amir Ofir
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Patent number: 10545434Abstract: In an example, a method of wetting a print blanket includes receiving a null cycle trigger during a printing session. The method also includes maintaining printing voltages on a forecast BID (binary ink developer) that has been prepared to print a next color separation onto a photoreceptor, and applying wet null voltages to a non-forecast BID. The method then includes engaging the non-forecast BID with the photoreceptor to transfer fluid other than ink to the photoreceptor during the null cycle.Type: GrantFiled: January 13, 2019Date of Patent: January 28, 2020Assignee: HP Indigo B.V.Inventors: Vitaly Portnoy, Michel Assenheimer, Amiran Lavon, Eric G Nelson, Amir Ofir
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Publication number: 20190146384Abstract: In an example, a method of wetting a print blanket includes receiving a null cycle trigger during a printing session. The method also includes maintaining printing voltages on a forecast BID (binary ink developer) that has been prepared to print a next color separation onto a photoreceptor, and applying wet null voltages to a non-forecast BID. The method then includes engaging the non-forecast BID with the photoreceptor to transfer fluid other than ink to the photoreceptor during the null cycle.Type: ApplicationFiled: January 13, 2019Publication date: May 16, 2019Inventors: Vitaly Portnoy, Michel Assenheimer, Amiran Lavon, Eric G. Nelson, Amir Ofir
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Patent number: 10191416Abstract: In an example, a method of wetting a print blanket includes receiving a null cycle trigger during a printing session. The method also includes maintaining printing voltages on a forecast BID (binary ink developer) that has been prepared to print a next color separation onto a photoreceptor, and applying wet null voltages to a non-forecast BID. The method then includes engaging the non-forecast BID with the photoreceptor to transfer fluid other than ink to the photoreceptor during the null cycle.Type: GrantFiled: August 8, 2014Date of Patent: January 29, 2019Assignee: HP INDIGO B.V.Inventors: Vitaly Portnoy, Michel Assenheimer, Amiran Lavon, Eric G. Nelson, Amir Ofir
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Publication number: 20180373181Abstract: In an example, a method of controlling voltage applied to a print blanket within a printing device includes printing a print job. During the printing, a null cycle trigger is received. In response to the trigger, contact between a print blanket and an impression drum is reduced.Type: ApplicationFiled: August 31, 2018Publication date: December 27, 2018Applicant: HP Indigo, B.V.Inventors: Vitaly PORTNOY, Michel Assenheimer, Amiran Lavon, Amir Ofir
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Patent number: 10078294Abstract: In an example, a method of controlling voltage applied to a print blanket within a printing device includes printing a print job. During the printing, a null cycle trigger is received. In response to the trigger, contact between a print blanket and an impression drum is reduced.Type: GrantFiled: June 30, 2014Date of Patent: September 18, 2018Assignee: HP Indigo B.V.Inventors: Vitaly Portnoy, Michel Assenheimer, Amiran Lavon, Amir Ofir
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Publication number: 20170212455Abstract: In an example, a method of wetting a print blanket includes receiving a null cycle trigger during a printing session. The method also includes maintaining printing voltages on a forecast BID (binary ink developer) that has been prepared to print a next color separation onto a photoreceptor, and applying wet null voltages to a non-forecast BID. The method then includes engaging the non-forecast BID with the photoreceptor to transfer fluid other than ink to the photoreceptor during the null cycle.Type: ApplicationFiled: August 8, 2014Publication date: July 27, 2017Inventors: Vitaly Portnoy, Michel Assenheimer, Amiran Lavon, Eric G. Nelson, Amir Ofir
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Publication number: 20170160677Abstract: In an example, a method of controlling voltage applied to a print blanket within a printing device includes printing a print job. During the printing, a null cycle trigger is received. In response to the trigger, contact between a print blanket and an impression drum is reduced.Type: ApplicationFiled: June 30, 2014Publication date: June 8, 2017Applicant: HEWLETT-PACKARD INDIGO B.V.Inventors: Vitaly PORTNOY, Michel ASSWNHEIMER, Amiran LAVON, Amir OFIR
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Patent number: 9594326Abstract: In one implementation, an image forming apparatus may include a photoconductive unit and a refresh unit. The photoconductive unit may include a photoconductive layer. The photoconductive layer may have a first polarity during a print routine. The refresh unit may apply a voltage to the photoconductive layer to electrically bias the photoconductive layer to have a second polarity during a refresh routine.Type: GrantFiled: June 28, 2013Date of Patent: March 14, 2017Assignee: HEWLETT-PACKARD INDIGO, B.V.Inventors: Amir Ofir, Sasi Moalem, Dmitry Maister, Seongsik Chang
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Patent number: 9428655Abstract: Described herein is a method for electrostatic printing including: (i) providing an ink composition having: a hydrocarbon carrier liquid and particles includes a resin and a colorant, and wherein the ink composition contains less than 0.3 mg of charge director per g of solids in the ink composition; (ii) adding a charge director to the ink composition, such that the total amount of charge director in the ink composition is at least 0.6 mg per g of solids in the ink composition, and, (iii) within a predetermined time of adding the charge director, printing the ink onto a print medium in an electrostatic printing process, wherein the predetermined time is 90 minutes or less.Type: GrantFiled: January 16, 2012Date of Patent: August 30, 2016Assignee: Hewlett-Packard Indigo B.V.Inventors: Gil Bar-Haim, Amir Ofir, Ilanit Mor, Alina Grishman, Albert Teishev
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Publication number: 20160147168Abstract: In one implementation, an image forming apparatus may include a photoconductive unit and a refresh unit. The photoconductive unit may include a photoconductive layer. The photoconductive layer may have a first polarity during a print routine. The refresh unit may apply a voltage to the photoconductive layer to electrically bias the photoconductive layer to have a second polarity during a refresh routine.Type: ApplicationFiled: June 28, 2013Publication date: May 26, 2016Applicant: Hewlett-Packard Indigo, B.V.Inventors: Amir OFIR, Sasi MOALEM, Dmitry MAISTER, Seongsik CHANG
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Publication number: 20140320576Abstract: Described herein is a method for electrostatic printing comprising: (i) providing an ink composition comprising: a hydrocarbon carrier liquid and particles comprising a resin and a colorant, and wherein the ink composition contains less than 0.3 mg of charge director per g of solids in the ink composition; (ii) adding a charge director to the ink composition, such that the total amount of charge director in the ink composition is at least 0.6 mg per g of solids in the ink composition, and, (iii) within a predetermined time of adding the charge director, printing the ink onto a print medium in an electrostatic printing process, wherein the predetermined time is 90 minutes or less. Also described herein is a packaged ink composition, and method for producing it.Type: ApplicationFiled: January 16, 2012Publication date: October 30, 2014Inventors: Gil Bar-Haim, Amir Ofir, Ilanit Mor, Alina Grishman, Albert Teishev
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Patent number: 8705990Abstract: A method includes moving a first end portion of a charging member with respect to a photoconductive member to obtain a first electrical discharge event corresponding to conduction of an electrical current from the charging member to the photoconductive member. The method also includes identifying a first adjustment value corresponding to a distance in which the first end portion moved toward the photoconductive member to obtain the first electrical discharge event. The method also includes moving a second end portion of the charging member with respect to the photoconductive member to obtain a second electrical discharge event corresponding to conduction of an electrical current from the charging member to the photoconductive member. The method also includes identifying a second adjustment value corresponding to a distance in which the second end portion moved toward the photoconductive member to obtain the second electrical discharge event.Type: GrantFiled: June 22, 2012Date of Patent: April 22, 2014Assignee: Hewlett-Packard Development Company, L.P.Inventors: Assaf Pines, Gadi Oron, Amir Ofir
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Publication number: 20130343771Abstract: A method includes moving a first end portion of a charging member with respect to a photoconductive member to obtain a first electrical discharge event corresponding to conduction of an electrical current from the charging member to the photoconductive member. The method also includes identifying a first adjustment value corresponding to a distance in which the first end portion moved toward the photoconductive member to obtain the first electrical discharge event. The method also includes moving a second end portion of the charging member with respect to the photoconductive member to obtain a second electrical discharge event corresponding to conduction of an electrical current from the charging member to the photoconductive member. The method also includes identifying a second adjustment value corresponding to a distance in which the second end portion moved toward the photoconductive member to obtain the second electrical discharge event.Type: ApplicationFiled: June 22, 2012Publication date: December 26, 2013Inventors: Assaf Pines, Gadi Oron, Amir Ofir
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Patent number: 8224210Abstract: In one embodiment, an image developer includes a developer roller rotatable along a photoconductor for presenting a layer of ink to the photoconductor and a cleaner for cleaning ink from the developer roller. The cleaner includes a first cleaning roller rotatable along the developer roller for removing ink from the developer roller and a second cleaning roller rotatable against the first cleaning roller for mechanically removing ink from the first cleaning roller. In one embodiment, the second cleaning roller deforms against the first cleaning roller such that the cross-sectional length of contact between the first and second cleaning rollers is in the range of 20% to 38% of the circumference of the first cleaning roller. In one embodiment, the second cleaning roller has a density in the range of 90 kg/m3 to 150 kg/m3.Type: GrantFiled: April 8, 2010Date of Patent: July 17, 2012Assignee: Hewlett-Packard Development Company, L.P.Inventors: Oran Levintant, Shachar Berger, Forest Patton, John W. Godden, Christian Schmid, Amir Ofir, Zvika Cohen
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Publication number: 20110249989Abstract: In one embodiment, an image developer includes a developer roller rotatable along a photoconductor for presenting a layer of ink to the photoconductor and a cleaner for cleaning ink from the developer roller. The cleaner includes a first cleaning roller rotatable along the developer roller for removing ink from the developer roller and a second cleaning roller rotatable against the first cleaning roller for mechanically removing ink from the first cleaning roller. In one embodiment, the second cleaning roller deforms against the first cleaning roller such that the cross-sectional length of contact between the first and second cleaning rollers is in the range of 20% to 38% of the circumference of the first cleaning roller. In one embodiment, the second cleaning roller has a density in the range of 90 kg/m3 to 150 kg/m3.Type: ApplicationFiled: April 8, 2010Publication date: October 13, 2011Applicant: Hewlett-Packard Development Company, L.P.Inventors: Oran Levintant, Shachar Berger, Forest Patton, John W. Godden, Christian Schmid, Amir Ofir, Zvika Cohen