# US 2020/0401080 A1 · Attachment, set of mountable and dismountable units, electrophotographic image forming apparatus and cartridge mounting method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0401080 A1 - Document ID: US20200401080A1 - Status: Published application - Kind: A1 - Application number: 17/012,193 - Filed: 2020-09-04 - Published: 2020-12-24 - Earliest claimed: 2018-03-29 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Naoki Maeda - Web page: https://patentgrep.com/patent/US20200401080A1 ## CPC - G03G 21/1846: {using a handle for carrying or pulling out of the main machine, legs of casings} - G03G 21/1821: {means for connecting the different parts of the process cartridge, e.g. attachment, positioning of parts with each other, pressure/distance regulation (G03G21/1825 takes precedence)} - G03G 21/1842: {for guiding and mounting the process cartridge, positioning, alignment, locks (G03G21/1864 and G03G21/1871 take precedence)} - G03G 21/1853: {the process cartridge being mounted perpendicular to the axis of the photosensitive member} - G03G 21/1857: {for transmitting mechanical drive power to the process cartridge, drive mechanisms, gears, couplings, braking mechanisms} - G03G 21/186: {Axial couplings} - G03G 2221/1654: Locks and means for positioning or alignment - G03G 2221/1846: using a handle for carrying or pulling out of the main machine - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY ## Abstract A mountable unit set usable with an electrophotographic-image-forming apparatus includes a cartridge and an attachment. A cartridge includes a photosensitive drum and a coupling member for receiving a driving force for rotating the photosensitive drum, from a driving shaft. An attachment includes a cylindrical portion for being mounted to a periphery of the driving shaft to suppress tilting of the driving shaft. Tilting of a driving-force transmitting member is suppressed. ## Claims ### Claim 1 A mountable unit set usable with an electrophotographic image forming apparatus, the mountable unit set comprising: (1) a cartridge detachably mountable to an apparatus main assembly of the electrophotographic image forming apparatus, the cartridge including a photosensitive drum and a coupling member for receiving a driving force for rotating the photosensitive drum from a driving shaft provided in the apparatus main assembly, and (2) an attachment mountable to the apparatus main assembly and including a cylindrical portion configured to be mounted around the driving shaft and configured to suppress tilting of the driving shaft. ### Claim 2 (depends on 1) A mountable unit set according to claim 1, wherein the coupling member is movable forward/backward. ### Claim 3 (depends on 1) A mountable unit set according to claim 1, wherein an inner diameter of the cylindrical portion of the attachment is greater than an outer diameter of the photosensitive drum. ### Claim 4 (depends on 1) A mountable unit set according to claim 1, wherein the attachment is provided with a grip portion extending from the cylindrical portion in a radial direction of the cylindrical portion. ### Claim 5 (depends on 4) A mountable unit said according to claim 4, wherein the cartridge includes a developing roller, and wherein a distance u from an axis of a cylindrical portion to a most remote point of the gripping portion, and a distance s from an axis of the photosensitive drum to an axis of the developing roller satisfies u>s. ### Claim 6 (depends on 4) A mountable unit set according to claim 4, wherein the grip portion is provided with a projection projecting in an axial direction of the cylindrical portion. ### Claim 7 (depends on 4) A mountable unit set according to claim 4, wherein the grip portion is provided with an opening. ### Claim 8 (depends on 4) A mountable unit set according to claim 4, wherein an entirety of a connecting portion between the cylindrical portion and the gripping portion is within a range less than 90 degrees about an axis of cylindrical portion in a plane perpendicular to the axis of the cylindrical portion. ### Claim 9 (depends on 4) A mountable unit set according to claim 4, wherein the attachment includes a double-sided tape mounted to the grip portion. ### Claim 10 (depends on 1) A mountable unit set according to claim 1, wherein attachment includes a double-sided tape. ### Claim 11 (depends on 1) A mountable unit set according to claim 1, wherein the cylindrical portion is provided with a retaining portion for preventing the attachment from disengaging from the electrophotographic image forming apparatus. ### Claim 12 (depends on 1) A mountable unit set according to claim 1, wherein the cylindrical portion has a snap fit. ### Claim 13 (depends on 1) An electrophotographic image forming apparatus comprising: an electrophotographic image forming apparatus main assembly including the driving shaft; and the mountable unit set according to claim 1 dismountably mounted to the apparatus main assembly. ### Claim 14 An attachment detachably mountable to an apparatus main assembly of an electrophotographic image forming apparatus, the attachment comprising: a cylindrical portion mountable to a driving shaft provided in the main assembly, the cylindrical portion being configured to suppress inclination of the driving shaft. ### Claim 15 (depends on 14) A attachment according to claim 14, wherein the attachment is provided with a grip portion extending from the cylindrical portion in a radial direction of the cylindrical portion. ### Claim 16 (depends on 15) An attachment according to claim 15, wherein the grip portion is provided with a projection projecting in an axial direction of the cylindrical portion. ### Claim 17 (depends on 15) An attachment according to claim 15, wherein the grip portion is provided with an opening. ### Claim 18 (depends on 15) An attachment according to claim 15, wherein an entirety of a connecting portion between cylindrical portion and gripping portion is within a range less than 90 degrees about an axis of cylindrical portion in a plane perpendicular to the axis of the cylindrical portion. ### Claim 19 (depends on 15) An attachment according to claim 15, wherein the attachment is provided with a double-sided tape mounted to the grip portion. ### Claim 20 (depends on 14) An attachment according to claim 14, wherein the attachment is provided with a double-sided tape. ### Claim 21 (depends on 14) An attachment according to claim 14, wherein the cylindrical portion is provided with a retaining portion for preventing the attachment from disengaging from the apparatus main assembly. ### Claim 22 (depends on 14) An attachment according to claim 14, wherein the cylindrical portion is provided with a snap fit. ### Claim 23 A mountable unit set usable with an electrophotographic image forming apparatus, the mountable unit set comprising: (1) a cartridge including a photosensitive drum and a coupling member for receiving a driving force for rotating the photosensitive drum; and (2) an attachment including a cylindrical portion having, with opposite ends of the cylindrical portion in an axial direction being open. ### Claim 24 (depends on 23) A mountable unit set according to claim 23, wherein the coupling member is movable forward/backward. ### Claim 25 (depends on 24) A mountable unit set according to claim 24, wherein an inner diameter of the cylindrical portion of the attachment is greater than an outer diameter of the photosensitive drum. ### Claim 26 (depends on 23) A mountable unit set according to claim 23, wherein the attachment is provided with a grip portion extending said cylindrical portion in a radial direction of the cylindrical portion. ### Claim 27 (depends on 26) A mountable unit set according to claim 26, wherein the cartridge includes a developing roller, and wherein a distance u from an axis of a cylindrical portion to a most remote point of the gripping portion, and a distance s from an axis of the photosensitive drum to an axis of the developing roller satisfies u>s. ### Claim 28 (depends on 26) A mountable unit set according to claim 26, wherein the grip portion is provided with a projection projecting in the axial direction of the cylindrical portion. ### Claim 29 (depends on 26) A mountable unit set according to claim 26, wherein the grip portion is provided with an opening. ### Claim 30 (depends on 26) A mountable unit set according to claim 26, wherein an entirety of a connecting portion between the cylindrical portion and the gripping portion is within a range less than 90 degrees about an axis of cylindrical portion in a plane perpendicular to the axis of the cylindrical portion. ### Claim 31 (depends on 26) A mountable unit set according to claim 26, wherein the attachment is provided with a double-sided tape mounted to the grip portion. ### Claim 32 (depends on 23) A mountable unit set according to claim 23, wherein the attachment is provided with a double-sided tape. ### Claim 33 (depends on 23) A mountable unit set according to claim 23, wherein the cylindrical portion is provided with a retaining portion. ### Claim 34 (depends on 23) A mountable unit set according to claim 23, wherein the cylindrical portion is provided with a snap fit. ### Claim 35 (depends on 23) An electrophotographic image forming apparatus comprising: an electrophotographic image forming apparatus main assembly including the driving shaft; and the mountable unit set according to claim 23 dismountably mounted to the apparatus main assembly. ### Claim 36 An attachment usable with an electrophotographic image forming apparatus, the attachment comprising: a cylindrical portion having opposite ends that are open in an axial direction, and a grip portion extending from an outer periphery of the cylindrical portion in a radial direction of the cylindrical portion. ### Claim 37 (depends on 36) An attachment according to claim 36, wherein the grip portion is provided with a projection projecting in the axial direction of the cylindrical portion. ### Claim 38 (depends on 36) An attachment according to claim 36, wherein the grip has an opening. ### Claim 39 (depends on 36) An attachment according to claim 36, wherein an entirety of a connecting portion between the cylindrical portion and the gripping portion is within a range less than 90 degrees about an axis of cylindrical portion in a plane perpendicular to the axis of the cylindrical portion. ### Claim 40 (depends on 36) An attachment according to claim 36, wherein the attachment is provided with a double-sided tape mounted to the grip portion. ### Claim 41 (depends on 36) An attachment according to claim 36, wherein the attachment is provided with a double-sided tape. ### Claim 42 (depends on 36) An attachment according to claim 36, wherein the cylindrical portion is provided with a retaining portion. ### Claim 43 (depends on 36) An attachment according to claim 36, wherein the cylindrical portion is provided with a snap fit. ### Claim 44 A cartridge mounting method comprising: a step of suppressing a tilting of a driving shaft by mounting an attachment to the driving shaft provided in a main assembly of an electrophotographic image forming apparatus, and a step of mounting a cartridge to the main assembly of the apparatus to which the attachment has been mounted.