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公开(公告)号：US11448979B2
公开(公告)日：2022-09-20
申请号：US16361776
申请日：2019-03-22
申请人： Ricoh Company, Ltd.
发明人： Tadahiko Morinaga , Tatsuru Moritani , Naoki Shiraishi , Shinji Aoki , Hisayoshi Ohshima , Yuichi Sato
摘要： A discharge device is provided. The discharge device includes a liquid feed-discharger, and the liquid feed-discharger includes a feed unit configured to feed a liquid and a discharge unit having discharge holes configured to discharge the liquid fed by the feed unit. A ratio (X/Y) of a maximum cross-sectional area X (mm2) to a minimum cross-sectional area Y (mm2) of the liquid feed-discharger in a direction orthogonal to an axial direction of the liquid feed-discharger is from 1 to 5.
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公开(公告)号：US20220236654A1
公开(公告)日：2022-07-28
申请号：US17648330
申请日：2022-01-19
发明人： Hiroki Watanabe , Ichiro Kanno , Masaharu Miura , Hayato Ida
摘要： A fine particle of a silicon polymer having a siloxane group and a silanol group, wherein a moisture adsorption amount of the fine particle at a temperature of 30° C. and a humidity of 80% RH is from 1.0 mg/g to 22.0 mg/g, an amount of the silanol group of the fine particle measured by a titration method using KOH is from 0.012 mmol/g to 0.120 mmol/g, and a number average particle diameter of primary particle of the fine particle is from 0.05 μm to 0.30 μm.
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公开(公告)号：US20220236653A1
公开(公告)日：2022-07-28
申请号：US17576014
申请日：2022-01-14
发明人： Takeshi Hashimoto , Hayato Ida , Kazuki Murata
摘要： A toner that is excellent in low-temperature fixability at the time of high-speed printing, achieves both hot offset resistance and winding resistance, and has such satisfactory durability as not to be liable to cause an image failure even at the time of long-term endurance. The toner includes a toner particle containing a binder resin including a first resin and a second resin, wherein the first resin is a crystalline resin, wherein the second resin is an amorphous resin, wherein, the toner has a domain-matrix structure formed of: a matrix containing the first resin; and domains each containing the second resin, wherein, an endothermic quantity ΔH (J/g) derived from the first resin satisfies a relationship of ΔH≥3, and wherein, in flow tester measurement of the toner, the following relationships are satisfied: T10≥65; T1−T10≤10.
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公开(公告)号：US20220214629A1
公开(公告)日：2022-07-07
申请号：US17655127
申请日：2022-03-16
发明人： Takashi Kenmoku , Kenta Kamikura , Yuzo Seino
摘要： A toner containing a toner particle, wherein, when a dielectric loss tangent measured at a frequency of 10 kHz in an impedance measurement on the toner in an environment having a temperature of 50° C. and a relative humidity of 50% RH is designated by tanδ50° C.(1), and a dielectric loss tangent measured at a frequency of 10 kHz in an impedance measurement on the toner in an environment having a temperature of 30° C. and a relative humidity of 50% RH after the impedance measurement on the toner in an environment having a temperature of 50° C. and a relative humidity of 50% RH is designated by tanδ30° C.(2), tanδ50° C.(1) is from 0.015 to 0.050, the relationship tanδ50° C.(1)>tanδ30° C.(2) is satisfied, and tanδ30° C.(2)/tanδ50° C.(1) is from 0.25 to 0.66.
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公开(公告)号：US20220206408A1
公开(公告)日：2022-06-30
申请号：US17429649
申请日：2019-07-26
发明人： Doron SCHLUMM , Mark SANDLER , Assaf PINES , Gilad NOY , Orel Yosef MIZRAHI
摘要： Herein is disclosed a method for concentrating a liquid electrostatic ink composition, the method comprising replacing a first liquid carrier in a liquid electrostatic ink composition with a second liquid carrier, wherein the liquid electrostatic ink composition comprises chargeable toner particles dispersed in the first liquid carrier; and removing the second liquid carrier to produce a concentrated liquid electrostatic ink composition, wherein the second liquid carrier has a boiling point below 100° C. and wherein the second liquid carrier has a lower boiling point than the first liquid carrier. Also disclosed herein is a concentrated liquid electrostatic ink composition producible according to the method.
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公开(公告)号：US20220206405A1
公开(公告)日：2022-06-30
申请号：US17130514
申请日：2020-12-22
摘要： A toner composition having improved toner usage efficiency, wherein toner particles having an average size range of 1-25 μm 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 μm to 1.7 μm 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.
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公开(公告)号：US11372363B2
公开(公告)日：2022-06-28
申请号：US17112452
申请日：2020-12-04
申请人： RICOH COMPANY, LTD.
摘要： An image forming apparatus is provided. The image forming apparatus includes an image bearer and a cleaning blade configured to remove toner particles remaining on the image bearer. The cleaning blade includes an elastic member in contact with a surface of the image bearer to remove the toner particles. The elastic member has a Martens hardness of from 3 to 8 N/mm2 when measured by a nanoindentation method with a load of 1 μN. The toner particles comprise toner base particles and an external additive, and the external additive comprise silica particles. A liberation ratio (Xs) of the silica particles liberated from the toner particles is from 40% to 75% when measured by an ultrasonic vibration method. A proportion (R70) of the silica particles having a volume-based particle diameter of 70 nm or more in the silica particles liberated from the toner particles is from 70% to 90% by number.
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公开(公告)号：US20220197172A1
公开(公告)日：2022-06-23
申请号：US17202599
申请日：2021-03-16
摘要： A toner composition having improved toner usage efficiency, wherein toner particles having an average size range of 1-25 μm 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 μm to 1.7 μm 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.
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公开(公告)号：US20220197169A1
公开(公告)日：2022-06-23
申请号：US17224324
申请日：2021-04-07
摘要： A toner composition having improved toner usage efficiency, wherein toner particles having an average size range of 1-25 μm 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 μm to 1.7 μm 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.
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公开(公告)号：US20220197164A1
公开(公告)日：2022-06-23
申请号：US17545597
申请日：2021-12-08
发明人： Junichi Tamura , Kazuhisa Shirayama , Rei Hijikawa , Ryuji Okamura , Yuya Chimoto , Hisasuke Kajihara
摘要： A method for manufacturing a toner includes a pigment crushing step of kneading a pigment, a binder, and a grinding agent to obtain a pigment dispersion in which the grinding agent and the crushed pigment are dispersed in the binder; and a step of obtaining toner particles by a predetermined method using the pigment dispersion. The binder and the grinding agent are contained in the resulting toner particles.
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