Patents by Inventor Rudolph Wayne Hrobsky
Rudolph Wayne Hrobsky 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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Publication number: 20220373917Abstract: A toner composition having improved toner usage efficiency, wherein toner particles having an average size range of 1-25 ?m may be mixed with an extra particulate additive package including a first small silica surface treated with both a silane and an aminosilane having a primary particle size of about 5 nm-20 nm, a second fumed silica having a primary particle size of 30 nm-60 nm, a third silica having a primary particle size of about 70 nm-120 nm, an electro-conductive titania having a primary particle size of 30 nm-60 nm and an acicular titania having a size of about 1.6 ?m to 1.7 ?m in length and about 130 nm in diameter. An alternative embodiment of the extra particulate additive package does not include a third silica having a primary particle size of about 70 nm-120 nm.Type: ApplicationFiled: August 3, 2022Publication date: November 24, 2022Inventors: KASTURI RANGAN SRINIVASAN, RUDOLPH WAYNE HROBSKY, JAMES CRAIG MINOR, DINESH TYAGI
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Publication number: 20220197170Abstract: A toner composition having improved toner usage efficiency, wherein toner particles having an average size range of 1-25 ?m may be mixed with an extra particulate additive package including a first small silica surface treated with both a silane and an aminosilane having a primary particle size of about 5 nm-20 nm, a second fumed silica having a primary particle size of 30 nm-60 nm, a third silica having a primary particle size of about 70 nm-120 nm, an electro-conductive titania having a primary particle size of 30 nm-60 nm and an acicular titania having a size of about 1.6 ?m to 1.7 ?m in length and about 130 nm in diameter. An alternative embodiment of the extra particulate additive package does not include a third silica having a primary particle size of about 70 nm-120 nm.Type: ApplicationFiled: December 22, 2020Publication date: June 23, 2022Inventors: KASTURI RANGAN SRINIVASAN, RUDOLPH WAYNE HROBSKY, JAMES CRAIG MINOR, DINESH TYAGI
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Publication number: 20220197172Abstract: A toner composition having improved toner usage efficiency, wherein toner particles having an average size range of 1-25 ?m may be mixed with an extra particulate additive package including a first small silica surface treated with both a silane and an aminosilane having a primary particle size of about 5 nm-20 nm, a second fumed silica having a primary particle size of 30 nm-60 nm, a third silica having a primary particle size of about 70 nm-120 nm, an electro-conductive titania having a primary particle size of 30 nm-60 nm and an acicular titania having a size of about 1.6 ?m to 1.7 ?m in length and about 130 nm in diameter. An alternative embodiment of the extra particulate additive package does not include a third silica having a primary particle size of about 70 nm-120 nm.Type: ApplicationFiled: March 16, 2021Publication date: June 23, 2022Inventors: KASTURI RANGAN SRINIVASAN, RUDOLPH WAYNE HROBSKY, JAMES CRAIG MINOR, DINESH TYAGI
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Publication number: 20220197171Abstract: A toner composition having improved toner usage efficiency, wherein toner particles having an average size range of 1-25 ?m may be mixed with an extra particulate additive package including a first small silica surface treated with both a silane and an aminosilane having a primary particle size of about 5 nm-20 nm, a second fumed silica having a primary particle size of 30 nm-60 nm, a third silica having a primary particle size of about 70 nm-120 nm, an electro-conductive titania having a primary particle size of 30 nm-60 nm and an acicular titania having a size of about 1.6 ?m to 1.7 ?m in length and about 130 nm in diameter. An alternative embodiment of the extra particulate additive package does not include a third silica having a primary particle size of about 70 nm-120 nm.Type: ApplicationFiled: March 16, 2021Publication date: June 23, 2022Inventors: KASTURI RANGAN SRINIVASAN, RUDOLPH WAYNE HROBSKY, JAMES CRAIG MINOR, DINESH TYAGI
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Publication number: 20220197173Abstract: A toner composition having improved toner usage efficiency, wherein toner particles having an average size range of 1-25 ?m may be mixed with an extra particulate additive package including a first small silica surface treated with both a silane and an aminosilane having a primary particle size of about 5 nm-20 nm, a second fumed silica having a primary particle size of 30 nm-60 nm, a third silica having a primary particle size of about 70 nm-120 nm, an electro-conductive titania having a primary particle size of 30 nm-60 nm and an acicular titania having a size of about 1.6 ?m to 1.7 ?m in length and about 130 nm in diameter. An alternative embodiment of the extra particulate additive package does not include a third silica having a primary particle size of about 70 nm-120 nm.Type: ApplicationFiled: March 16, 2021Publication date: June 23, 2022Inventors: KASTURI RANGAN SRINIVASAN, RUDOLPH WAYNE HROBSKY, JAMES CRAIG MINOR, DINESH TYAGI
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Patent number: 10684566Abstract: A method of preparing an organic photoconductor drum having a protective overcoat on its outermost surface is provided. In an example embodiment, a photoconductor drum having an electrically conductive substrate, a charge generation layer, a charge transport layer and an outermost protective overcoat layer is provided. The photoconductor drum is cured using a two-step process. The first curing step applies either ionizing irradiation, such as with an electron beam or by gamma rays or applies non-ionizing irradiation such as ultraviolet light to the photoconductor drum. A mask is sized and placed over the print area of the initially cured photoconductor drum, thereby exposing the outermost edges of the photoconductor drum. The outer edges of the masked photoconductor drum is then exposed to a second curing step using ultraviolet light irradiation.Type: GrantFiled: March 27, 2019Date of Patent: June 16, 2020Assignee: LEXMARK INTERNATIONAL, INC.Inventors: Weimei Luo, Mark Thomas Bellino, Rudolph Wayne Hrobsky
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Patent number: 10620555Abstract: A method of curing a protective overcoat layer on the outermost portion of an organic photoconductor drum using dual curing process is provided. The first curing step applies either ionizing irradiation, such as with an electron beam or by gamma rays or applies non-ionizing irradiation such as ultraviolet light to the overcoated photoconductor drum. A mask or shield is sized to be placed over the print area of the initially cured photoconductor drum, thereby exposing the outermost edges of the photoconductor drum. The outer edges of the masked photoconductor drum is then exposed to a second curing step using non-ionizing irradiation such as ultraviolet light.Type: GrantFiled: March 27, 2019Date of Patent: April 14, 2020Assignee: LEXMARK INTERNATIONAL, INC.Inventors: Weimei Luo, Mark Thomas Bellino, Rudolph Wayne Hrobsky
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Patent number: 10571817Abstract: A method of curing a protective overcoat layer on the outermost portion of an organic photoconductor drum using dual curing process is provided. The first curing step applies either ionizing irradiation, such as with an electron beam or by gamma rays or applies non-ionizing irradiation such as ultraviolet light to the overcoated photoconductor drum. A mask or shield is sized to be placed over the print area of the initially cured photoconductor drum, thereby exposing the outermost edges of the photoconductor drum. The outer edges of the masked photoconductor drum is then exposed to a second curing step using non-ionizing irradiation such as ultraviolet light.Type: GrantFiled: December 19, 2018Date of Patent: February 25, 2020Assignee: LEXMARK INTERNATIONAL, INC.Inventors: Weimei Luo, Mark Thomas Bellino, Rudolph Wayne Hrobsky
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Patent number: 10571818Abstract: A method of preparing an organic photoconductor drum having a protective overcoat on its outermost surface is provided. In an example embodiment, a photoconductor drum having an electrically conductive substrate, a charge generation layer, a charge transport layer and an outermost protective overcoat layer is provided. The photoconductor drum is cured using a two-step process. The first curing step applies either ionizing irradiation, such as with an electron beam or by gamma rays or applies non-ionizing irradiation such as ultraviolet light to the photoconductor drum. A mask is sized and placed over the print area of the initially cured photoconductor drum, thereby exposing the outermost edges of the photoconductor drum. The outer edges of the masked photoconductor drum is then exposed to a second curing step using ultraviolet light irradiation.Type: GrantFiled: December 19, 2018Date of Patent: February 25, 2020Assignee: LEXMARK INTERNATIONAL, INC.Inventors: Weimei Luo, Mark Thomas Bellino, Rudolph Wayne Hrobsky
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Publication number: 20190384199Abstract: A toner composition includes low and high molecular weight polyester resins. It also includes a release agent, such as a polyolefin wax, and a tri-block copolymer having a structure of the form A-b-B-b-A, wherein A is a hard block and B is a soft block. The hard block is styrene, while the soft block is butadiene/butylene. Upon partial hydrogenation, the copolymer provides improved dispersion, mobility control, and domain size of the release agent.Type: ApplicationFiled: June 14, 2019Publication date: December 19, 2019Inventors: Ann P. Holloway, Rudolph Wayne Hrobsky, Michael Gordon Miller, James Craig Minor, Dinesh Tyagi
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Patent number: 10289014Abstract: A method of preparing an organic photoconductor drum having a protective overcoat on its outermost surface is provided. In an example embodiment, a photoconductor drum having an electrically conductive substrate, a charge generation layer, a charge transport layer and an outermost protective overcoat layer is provided. The photoconductor drum is cured using a two-step process. The first curing step applies either ionizing irradiation, such as with an electron beam or by gamma rays or applies non-ionizing irradiation such as ultraviolet light to the photoconductor drum. A mask is sized and placed over the print area of the initially cured photoconductor drum, thereby exposing the outermost edges of the photoconductor drum. The outer edges of the masked photoconductor drum is then exposed to a second curing step using ultraviolet light irradiation.Type: GrantFiled: December 18, 2017Date of Patent: May 14, 2019Assignee: LEXMARK INTERNATIONAL, INC.Inventors: Weimei Luo, Mark Thomas Bellino, Rudolph Wayne Hrobsky
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Patent number: 10289013Abstract: A method of curing a protective overcoat layer on the outermost portion of an organic photoconductor drum using dual curing process is provided. The first curing step applies either ionizing irradiation, such as with an electron beam or by gamma rays or applies non-ionizing irradiation such as ultraviolet light to the overcoated photoconductor drum. A mask or shield is sized to be placed over the print area of the initially cured photoconductor drum, thereby exposing the outermost edges of the photoconductor drum. The outer edges of the masked photoconductor drum is then exposed to a second curing step using non-ionizing irradiation such as ultraviolet light.Type: GrantFiled: December 18, 2017Date of Patent: May 14, 2019Assignee: LEXMARK INTERNATIONAL, INC.Inventors: Weimei Luo, Mark Thomas Bellino, Rudolph Wayne Hrobsky
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Patent number: 8178265Abstract: A photoreceptor comprising a spectral marker and an electrophotographic printer using the same wherein the presence of the spectral marker is detected by the spectral marker detector, which enables photoreceptor authentication and thickness determinations, thereby permitting adjustment and optimization of component operating parameters within the electrophotographic printer.Type: GrantFiled: December 29, 2008Date of Patent: May 15, 2012Assignee: Lexmark International, Inc.Inventors: David Glenn Black, James Alan Hartman, Rudolph Wayne Hrobsky, Ronald Harold Levin, Robert Max Lopez, Jr., Weimei Luo, Dat Quoc Nguyen, Franklin Dilworth Zartman
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Publication number: 20100167191Abstract: A photoreceptor comprising a spectral marker and an electrophotographic printer using the same wherein the presence of the spectral marker is detected by the spectral marker detector, which enables photoreceptor authentication and thickness determinations, thereby permitting adjustment and optimization of component operating parameters within the electrophotographic printer.Type: ApplicationFiled: December 29, 2008Publication date: July 1, 2010Inventors: David Glenn Black, James Alan Hartman, Rudolph Wayne Hrobsky, Ronald Harold Levin, Robert Max Lopez, JR., Weimei Luo, Dat Quoc Nguyen, Franklin Dilworth Zartman