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1. 发明授权

US10338493B2 Developing roller, and method of producing the same 有权
公开(公告)号：US10338493B2
公开(公告)日：2019-07-02
申请号：US15372008
申请日：2016-12-07
申请人： SUMITOMO RUBBER INDUSTRIES, LTD.
发明人： Yuta Imase
IPC分类号： G03G15/08
摘要： A developing roller (1) is provided, which includes a tubular porous inner layer (2) of a foamed product of a semiconductive rubber composition containing an ethylene propylene rubber and a paraffin oil, and an outer layer (4) of a seamless tube of a semiconductive thermoplastic polyamide elastomer provided on an outer peripheral surface (3) of the inner layer (2), and has an overall Asker-C hardness of not less than 30 degrees and not greater than 60 degrees. A production method is also provided, which includes the steps of: preparing a tube having a thickness T of 100 to 400 μm and having an inner diameter D2 for an outer layer; preparing a tubular inner layer having an outer diameter D1; and press-inserting the inner layer into the tube; wherein an interference represented by a difference D1- D2 between the outer diameter D1 of the inner layer and the inner diameter D2 of the tube is 100 to 400 μm.

2. 发明授权

US10712685B2 Developing roller and method of producing the same 有权
公开(公告)号：US10712685B2
公开(公告)日：2020-07-14
申请号：US16398182
申请日：2019-04-29
申请人： SUMITOMO RUBBER INDUSTRIES, LTD.
发明人： Yuta Imase
IPC分类号： G03G15/08 , B23K26/352 , B23K26/402
摘要： There are provided a developing roller having no risks of the image density of formed images rapidly decreasing and the occurrence of an uneven density since a toner transportation amount does not decrease greatly even if image formation is repeated, and a method of producing the same. In a developing roller, a plurality of recesses are disposed on an outer circumferential surface of a roller main body so that a ratio PA/PC of a pitch PA in an axial direction on the outer circumferential surface to a pitch PC in a circumferential direction is set to a range exceeding 1.1. The production method includes a process of forming the recesses on the outer circumferential surface by laser processing.

3. 发明授权

US09939752B2 Semiconductive roller, and method of producing the same 有权
公开(公告)号：US09939752B2
公开(公告)日：2018-04-10
申请号：US15356279
申请日：2016-11-18
申请人： SUMITOMO RUBBER INDUSTRIES, LTD.
发明人： Yuta Imase
IPC分类号： G03G15/02
CPC分类号： G03G15/0233 , G03G15/0818 , G03G15/1685 , G03G21/0058 , G03G2215/2051 , G03G2215/2061 , G03G2215/2064
摘要： A semiconductive roller is provided, which includes a tubular main body having a multiplicity of concavities (2) provided in an outer peripheral surface (1) thereof in at least one of circumferentially overlapping relation and axially overlapping relation. The concavities are each gently concave toward a center thereof from an outer periphery thereof. A semiconductive roller production method is also provided, which includes the step of forming the concavities by a laser processing method.

4. 发明授权

US10234786B2 Developing roller, and method of producing the same 有权
公开(公告)号：US10234786B2
公开(公告)日：2019-03-19
申请号：US15915836
申请日：2018-03-08
申请人： SUMITOMO RUBBER INDUSTRIES, LTD.
发明人： Yuta Imase
IPC分类号： G03G15/08
摘要： The inventive developing roller (1) includes a roller body (2) having an outer peripheral surface (5) which includes a surface roughness component including a multiplicity of asperities and having a void volume Vv of not greater than 0.5 ml/m2, and a surface waviness component including a multiplicity of asperities having a longer periodicity than the surface roughness component and having a void volume Vv of not less than 0.05 ml/m2 and not greater than 3.5 ml/m2, the void volumes Vv being each defined as the sum Vvc+Vvv of a core void volume Vvc and a dale void volume Vvv. The inventive production method includes the steps of: polishing the outer peripheral surface (5); and finishing the polished outer peripheral surface by at least one method selected from the group consisting of a laser processing method, a wet blasting method and a dry blasting method, so that the outer peripheral surface has a surface geometry satisfying the requirements for the void volumes Vv.

5. 发明申请

US20180292768A1 DEVELOPING ROLLER, AND METHOD OF PRODUCING THE SAME 审中-公开
公开(公告)号：US20180292768A1
公开(公告)日：2018-10-11
申请号：US15915836
申请日：2018-03-08
申请人： SUMITOMO RUBBER INDUSTRIES, LTD.
发明人： Yuta Imase
IPC分类号： G03G15/08
CPC分类号： G03G15/0818 , G03G2215/0861 , G03G2215/0863
摘要： The inventive developing roller (1) includes a roller body (2) having an outer peripheral surface (5) which includes a surface roughness component including a multiplicity of asperities and having a void volume Vv of not greater than 0.5 ml/m2, and a surface waviness component including a multiplicity of asperities having a longer periodicity than the surface roughness component and having a void volume Vv of not less than 0.05 ml/m2 and not greater than 3.5 ml/m2, the void volumes Vv being each defined as the sum Vvc+Vvv of a core void volume Vvc and a dale void volume Vvv. The inventive production method includes the steps of: polishing the outer peripheral surface (5); and finishing the polished outer peripheral surface by at least one method selected from the group consisting of a laser processing method, a wet blasting method and a dry blasting method, so that the outer peripheral surface has a surface geometry satisfying the requirements for the void volumes Vv.

6. 发明授权

US10067439B2 Charging roller, and method of producing the same 有权
公开(公告)号：US10067439B2
公开(公告)日：2018-09-04
申请号：US15855222
申请日：2017-12-27
申请人： SUMITOMO RUBBER INDUSTRIES, LTD.
发明人： Yuta Imase
IPC分类号： G03G15/02
CPC分类号： G03G15/0233
摘要： A charging roller is provided which has a simple construction without provision of a coating film and yet is capable of uniformly electrically charging the surface of a photoreceptor body and more advantageously suppressing adhesion and accumulation of fine particles. A charging roller production method is also provided. The charging roller (1) includes a roller body (2) having an outer peripheral surface (5) which includes a surface roughness component including a multiplicity of asperities and having a void volume Vv of less than 0.3 ml/m2, and a surface waviness component including a multiplicity of asperities having a lower frequency than the surface roughness component and having a void volume Vv of not less than 0.05 ml/m2 and not greater than 6 ml/m2, the void volumes Vv being each defined as the sum Vvc+Vvv of a core void volume Vvc and a dale void volume Vvv. The production method includes the step of finishing the outer peripheral surface (5) into a surface geometry satisfying the aforementioned requirements for the void volumes Vv by at least one of laser processing, wet blasting and dry blasting after polishing the outer peripheral surface (5).

7. 发明授权

US10012927B2 Developing roller including roller body with simplified structure without a coating film 有权
公开(公告)号：US10012927B2
公开(公告)日：2018-07-03
申请号：US15679256
申请日：2017-08-17
申请人： SUMITOMO RUBBER INDUSTRIES, LTD.
发明人： Kei Tajima , Yuta Imase
IPC分类号： G03G15/08
CPC分类号： G03G15/0808 , G03G15/0818
摘要： A developing roller is provided, which includes a roller body having a simplified structure without a coating film and yet having a higher wear resistance. The developing roller (1) includes a roller body (2) made of a crosslinked product of a rubber composition containing a rubber component including 20 to 50 parts by mass of ECO and/or GECO as an ion conductive rubber and 50 to 80 parts by mass of NBIR based on 100 parts by mass of the overall rubber component, and an oxide film (6) formed in an outer peripheral surface (5) of the roller body (2) by irradiation with ultraviolet radiation or the like.

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