US20210114830A1 - Belt driving device, transfer device, and image forming apparatus - Google Patents
Belt driving device, transfer device, and image forming apparatus Download PDFInfo
- Publication number
- US20210114830A1 US20210114830A1 US16/851,542 US202016851542A US2021114830A1 US 20210114830 A1 US20210114830 A1 US 20210114830A1 US 202016851542 A US202016851542 A US 202016851542A US 2021114830 A1 US2021114830 A1 US 2021114830A1
- Authority
- US
- United States
- Prior art keywords
- belt
- rotary members
- driving device
- peripheral surface
- removing member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H5/00—Feeding articles separated from piles; Feeding articles to machines
- B65H5/02—Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains
- B65H5/021—Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains by belts
- B65H5/023—Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains by belts between a pair of belts forming a transport nip
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H5/00—Feeding articles separated from piles; Feeding articles to machines
- B65H5/02—Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains
- B65H5/021—Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains by belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2403/00—Power transmission; Driving means
- B65H2403/20—Belt drives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/20—Belts
- B65H2404/22—Cross section profile
- B65H2404/222—Flat belt
- B65H2404/2222—Flat belt with protrusions on inner side; Beads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/20—Belts
- B65H2404/22—Cross section profile
- B65H2404/224—Cross section profile details of edges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/20—Belts
- B65H2404/25—Driving or guiding arrangements
- B65H2404/254—Arrangement for varying the guiding or transport length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/20—Belts
- B65H2404/25—Driving or guiding arrangements
- B65H2404/256—Arrangement of endless belt
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2801/00—Application field
- B65H2801/03—Image reproduction devices
- B65H2801/06—Office-type machines, e.g. photocopiers
Definitions
- the present disclosure relates to a belt driving device, a transfer device, and an image forming apparatus.
- JP-A-2002-333779 discloses an image forming apparatus in which a transfer belt includes a rib in a circumferential direction at an end portion in a width direction in order to prevent the belt from shifting, and a stretch roller having the largest length, in the width direction, of a portion where the stretch roller is in contact with the transfer belt is a follower roller.
- Non-limiting embodiments of the present disclosure relate to preventing damage to a belt member caused by a protrusion riding on a rotary member.
- aspects of certain non-limiting embodiments of the present disclosure address the above advantages and/or other advantages not described above. However, aspects of the non-limiting embodiments are not required to address the advantages described above, and aspects of the non-limiting embodiments of the present disclosure may not address advantages described above.
- a belt driving device including: an annular belt member; plural rotary members that extend in parallel and rotate, the belt member being wound around the rotary members, the belt member circulating; a protrusion that protrudes from an inner peripheral surface of the belt member, the protrusion extending along an edge of the belt member, the protrusion and each rotary member being arranged in an extending direction of the rotary member; and a removing member including a plate-shaped portion, in which the plate-shaped portion of the removing member is in contact with an outer peripheral surface of the belt member at a location where the removing member faces one of the rotary members with the belt member being interposed therebetween, so as to remove unnecessary matters from the outer peripheral surface of the belt member, and the removing member extends to an outside of end portions of the rotary members in the extending direction.
- FIG. 1 is a schematic configuration diagram showing an image forming apparatus of a first exemplary embodiment
- FIG. 2 is a side view schematically showing a structure of a secondary transfer unit
- FIG. 3 is a top view schematically showing the structure of the secondary transfer unit
- FIG. 4 is a diagram schematically showing a structure around a cleaning blade
- FIG. 5 is a diagram schematically showing a structure around a cleaning blade according to a second exemplary embodiment of the present disclosure
- FIG. 6 is a diagram showing a boundary position between a central portion and an end portion
- FIG. 7 is a diagram schematically showing a structure around a cleaning blade according to a third exemplary embodiment of the present disclosure.
- FIG. 8 is a diagram schematically showing a structure around a cleaning blade according to a fourth exemplary embodiment of the present disclosure.
- FIG. 1 is a schematic configuration diagram showing an image forming apparatus of a first exemplary embodiment.
- An image forming apparatus 1 shown in FIG. 1 is a so-called tandem color printer.
- a sheet P is used as a recording material in the image forming apparatus 1 .
- Plastic paper or an envelope other than the sheet P may be employed as the recording material.
- the sheet P is used as a representative of the recording material.
- the image forming apparatus 1 includes four image engines 10 Y, 10 M, 10 C, and 10 K corresponding to four colors of, for example, yellow (Y), magenta (M), cyan (C), and black (K).
- each of the image engines 10 Y, . . . , 10 K forms a toner image by a so-called electrophotogmphic process.
- the toner image of each color is formed on a corresponding one of photoconductor drums 11 Y, 11 M, 11 C, 11 K by sequentially performing the steps of charging, exposure, and development.
- the image forming apparatus 1 in the present exemplary embodiment employs an indirect transfer method, and includes an intermediate transfer belt 30 .
- the image forming apparatus 1 also includes a secondary transfer unit 50 , a fixing device 60 , and a sheet transport unit 80 .
- the intermediate transfer belt 30 is an endless belt stretched over support rollers 31 to 35 .
- the intermediate transfer belt 30 circulates counterclockwise through the image forming units 10 Y, 10 M, 10 C, and 10 K and the secondary transfer unit 50 .
- the image engines 10 Y, . . . , 10 K have primary transfer rollers 15 Y, 15 M, 15 C, and 15 K at positions where the primary transfer rollers 15 Y, 15 M, 15 C, and 15 K face the photoconductor drums 11 Y, . . . , 11 K with the intermediate transfer belt 30 interposed therebetween.
- the primary transfer rollers 15 Y, . . . , 15 K cause the toner images on the photoconductor drums 11 Y, . . . , 11 K to be electrostatically attracted to the intermediate transfer belt 30 by receiving a voltage.
- the intermediate transfer belt 30 carries and moves the color image and transports the color image to the secondary transfer unit 50 .
- the secondary transfer unit 50 is provided such that the intermediate transfer belt 30 is interposed between the secondary transfer unit 50 and a backup roller 34 that is one of the support rollers 31 to 35 .
- the secondary transfer unit 50 transfers the color image with the sheet P being interposed between the secondary transfer unit 50 and the intermediate transfer belt 30 .
- Sheets P are stored in a stacked state on a sheet tray T provided in a lower part of the image forming apparatus 1 .
- the sheets P in the sheet tray T is taken out one by one from the sheet tray T by a feeding roller 81 provided in the sheet transport unit 80 and retard rollers 82 , and is transported along a transport path R by transport rollers 83 .
- Registration rollers 84 of the sheet transport unit 80 feed the sheet P to the secondary transfer unit 50 in accordance with timing of transporting the color image by the intermediate transfer belt 30 .
- the secondary transfer unit 50 transfers the color image on the intermediate transfer belt 30 onto the sheet P by receiving a voltage.
- the secondary transfer unit 50 is an example of a belt driving device of the present disclosure, and is also an example of a transfer device of the present disclosure.
- the sheet P on which the color image is transferred by the secondary transfer unit 50 is transported to the fixing device 60 by the secondary transfer unit 50 and the transport rollers 83 of the sheet transport unit 80 .
- a combination of the image forming units 10 Y, 10 M, 10 C, and 10 K, the intermediate transfer belt 30 , and the secondary transfer unit 50 corresponds to an example of an image forming unit according to the present disclosure.
- a combination of the secondary transfer unit 50 and the sheet transport unit 80 corresponds to an example of a transport unit according to the present disclosure.
- the fixing device 60 fixes the color image on the sheet P by applying heat and pressure to the sheet P.
- the sheet P on which the color image is fixed by the fixing device 60 is fed to the outside of the image forming apparatus 1 by delivery rollers 86 provided in the sheet transport unit 80 .
- the secondary transfer unit 50 will be described in more detail below.
- FIGS. 2 and 3 are diagrams schematically showing a structure of the secondary transfer unit.
- FIG. 2 is a side view and
- FIG. 3 is a top view.
- FIG. 3 shows the structure in which the inside of the secondary transfer unit is seen through.
- the secondary transfer unit 50 includes a transfer roller 51 , a separation roller 52 , and an endless transfer belt 53 wound around the transfer roller 51 and the separation roller 52 .
- the secondary transfer unit 50 is unitized by assembling elements in a transfer unit support frame 501 .
- the transfer roller 51 and the separation roller 52 include rotation shafts 511 and 521 .
- the rotation shafts 511 and 521 are rotatably supported by the transfer unit support frame 501 .
- the transfer roller 51 and the separation roller 52 correspond to an example of plural rotary members of the present disclosure.
- the transfer belt 53 corresponds to an example of a belt member of the present disclosure.
- the transfer roller 51 is driven by a transfer motor 56 to rotate clockwise to drive the transfer belt 53 .
- the transfer belt 53 is a resin belt having low elasticity and circulates clockwise by receiving a driving force by the transfer roller 53 .
- the transfer roller 51 presses the transfer belt 53 against the intermediate transfer belt 30 from the inside of the transfer belt 53 .
- the sheet P is fed between the transfer belt 53 and the intermediate transfer belt 30 pressed against each other, the sheet P is transported in a circulation direction while being interposed between the transfer belt 53 and the intermediate transfer belt 30 .
- the transfer roller 51 is connected to a power supply (not shown), and a transfer bias is applied to the transfer roller 51 from the power supply. By the action of the transfer bias, the color image on the intermediate transfer belt 30 is transferred onto the sheet P while the sheet P passes between the transfer belt 53 and the intermediate transfer belt 30 .
- the separation roller 52 is a roller having a diameter smaller than that of the transfer roller 51 . Since the separation roller 52 abruptly bends a traveling direction of the transfer belt 53 , a leading end of the sheet P placed on the transfer belt 53 is separated from the transfer belt 53 . In the present exemplary embodiment, the separation roller 52 is shorter in length than the transfer roller 51 and rotates following movement of the intermediate transfer belt 30 .
- resin ribs 531 are provided.
- the ribs 531 prevent the transfer belt 53 from falling off the transfer roller 51 .
- the rib 531 protrudes inward from an inner peripheral surface of the transfer belt 53 .
- the rib 531 extends in a movement direction of the transfer belt 53 along the edge of the transfer belt 53 .
- the ribs 531 and the transfer roller 51 are arranged in an extending direction of the rotation shaft 511 .
- the ribs 531 and the separation roller 52 are arranged in an extending direction of the rotation shaft 521 .
- the ribs 531 are provided on both sides of the transfer belt 53 across the transfer roller 51 and the separation roller 52 .
- the rib 531 corresponds to an example of a protrusion of the present disclosure.
- the secondary transfer unit 50 includes a cleaning blade 55 .
- An edge of the cleaning blade 55 is in contact with an outer peripheral surface of the transfer belt 53 .
- a position of the cleaning blade 55 is fixed with respect to the transfer unit support frame 501 .
- the edge of the cleaning blade 55 rubs against the outer peripheral surface of the transfer belt 53 with the movement of the transfer belt 53 .
- the toner and other contaminants adhering to the transfer belt 53 are rubbed by the cleaning blade 55 and scraped off from the transfer belt 53 .
- the cleaning blade 55 is provided at a position where the cleaning blade 55 faces the transfer roller 51 with the transfer belt 53 being interposed therebetween.
- the cleaning blade 55 prevents the ribs 531 of the transfer belt 53 from riding on the transfer roller 51 .
- FIG. 4 is a diagram schematically showing a structure around the cleaning blade.
- FIG. 4 shows a cross section of the transfer roller 51 and the transfer belt 53 .
- the cleaning blade 55 includes a rubber first portion 551 having a plate-shaped outer shape, and a metal second portion 552 holding the first portion 551 .
- An edge of the first portion 551 is in contact with the outer peripheral surface of the transfer belt 53 to remove unnecessary matters.
- a length of the cleaning blade 55 in the extending direction of the transfer roller 51 is longer than that of the transfer roller 51 . End portions of the cleaning blade 55 reach further outside than end portions of the transfer roller 51 .
- the transfer belt 53 is driven by the transfer roller 51 to circulate as described above.
- the transfer belt 53 may deviate, that is, so called “walk” may occur. Due to the walk, a traveling position of the transfer belt 53 during the circulation deviates in the extending direction of the transfer roller 51 intersecting with the circulation direction.
- FIG. 4 shows a state in which the transfer belt 53 deviates to the left side of the figure and comes close to a wall of the transfer unit support frame 501 supporting the rotation shaft 511 .
- the rib 531 comes into contact with the end portion of the transfer roller 51 to reduce the deviation.
- a part of the rib 531 may ride on the end portion of the transfer roller 51 while being in contact with the end portion of the transfer roller 51 .
- a force that pushes back the transfer belt 53 acts such that the traveling position of the transfer belt 53 returns toward a center of the transfer belt 53 .
- a strong bending stress or the like is applied to the transfer belt 53 . Accordingly, the transfer belt 53 may be damaged when the rib 531 rides on the transfer roller 51 repeatedly.
- the cleaning blade 55 since the cleaning blade 55 is long as described above, an edge portion of the transfer belt 53 is pressed by the force with which the edge of the cleaning blade 55 is in contact with the outer peripheral surface of the transfer belt 53 , and riding of the rib 531 onto the transfer roller 51 is prevented.
- a location where the cleaning blade 55 presses the transfer belt 53 is a part of the entire circumference of the transfer belt 53 .
- the transfer belt 53 deviates until the rib 531 comes into contact with the end portion of the transfer roller 51 , the force that pushes back the transfer belt 53 acts strongly at the location, and the traveling position of the transfer belt 53 returns toward the center of the transfer belt 53 . Therefore, the frequency at which the rib 531 rides on the end portion of the transfer roller 51 is reduced. As a result, damage to the transfer belt 53 is prevented and the cleaning failure is also prevented.
- the transfer roller 51 is a driving roller driven by the transfer motor 56 , a force that changes the traveling position of the transfer belt 53 in the extending direction of the transfer roller 51 is stronger than that of the separation roller 52 that rotates following the transfer belt 53 . Since the cleaning blade 55 is provided at the position where the cleaning blade 55 faces such a driving roller, the force that pushes back the transfer belt 53 strongly acts when the rib 531 comes into contact with the end portion of the transfer roller 51 , and the riding of the rib 531 is strongly prevented.
- the transfer roller 51 is a roller having a diameter larger than that of the separation roller 52 , the force that changes the traveling position of the transfer belt 53 in the extending direction of the transfer roller 51 is stronger than that of the separation roller 52 . Also, since the cleaning blade 55 is provided at the position where the cleaning blade 55 faces such a large-diameter roller, the force that pushes back the transfer belt 53 strongly acts when the rib 531 comes into contact with the end portion of the transfer roller 51 , and the riding of the rib 531 is strongly prevented.
- the transfer roller 51 is a roller longer than the separation roller 52 , the force that changes the traveling position of the transfer belt 53 in the extending direction of the transfer roller 51 is stronger than that of the separation roller 52 . Also, since the cleaning blade 55 is provided at the position where the cleaning blade 55 faces such a long roller, the force that pushes back the transfer belt 53 strongly acts when the rib 531 comes into contact with the end portion of the transfer roller 51 , and the riding of the rib 531 is strongly prevented.
- the second exemplary embodiment is the same as the first exemplary embodiment except that a structure of the cleaning blade 55 is different, the description will be focused on differences from the first exemplary embodiment and a repetitive description will be omitted.
- FIG. 5 is a diagram schematically showing a structure around a cleaning blade according to the second exemplary embodiment of the present disclosure.
- a shape of a second portion 552 of the cleaning blade 55 is different from that of the first exemplary embodiment. That is, the second portion 552 at an end portion 553 in the extending direction of the transfer roller 51 protrudes toward the transfer belt 53 and a distance between the second portion 552 and the transfer belt 53 is shorter at the end portion 553 than that at a central portion 554 . That is, protrusion of the first portion 551 toward the transfer belt 53 is smaller at the end portion 553 than at the central portion 554 .
- FIG. 6 is a diagram showing a boundary position between a central portion and an end portion.
- a boundary B between the central portion 554 and the end portion 553 is located near an end portion of the transfer roller 51 in the extending direction of the transfer roller 51 . More specifically, on the basis of a position P 0 at the end portion of the transfer roller 51 , the boundary B is located on an inner side of a first location P 1 .
- the first location P 1 is located on an outer side of the position P 0 of the end portion and at a distance d from the position P 0 .
- the distance d is equal to a width d of the rib 531 . Accordingly, the cleaning blade 55 is in strong contact with the outer peripheral surface of the transfer belt 53 at a location where the rib 531 rides on the transfer roller 51 , and the riding of the rib 531 is strongly prevented.
- the boundary B is located on an outer side of a second location P 2 .
- the second location P 2 is located on an inner side of the position P 0 of the end portion and at the distance d, which is equal to the width of the rib 531 , from the position P 0 . Accordingly, the cleaning blade 55 is in contact with the outer peripheral surface of the transfer belt 53 with a strength suitable for cleaning, at a location where contribution of the rib 531 to the prevention of riding is low, and high cleaning performance is obtained.
- the third exemplary embodiment is the same as the first exemplary embodiment except that a structure of the cleaning blade 55 is different, the description will be focused on differences from the first exemplary embodiment and a repetitive description will be omitted.
- FIG. 7 is a diagram schematically showing a structure around a cleaning blade according to the third exemplary embodiment of the present disclosure.
- a shape of the first portion 551 of the cleaning blade 55 is different from that of the first exemplary embodiment. That is, in the first portion 551 , a thickness of an end portion 555 is larger than the other portions (that is, a central portion). As a result, the first portion 551 has higher rigidity at the end portion 555 than at the central portion.
- the cleaning blade 55 including the first portion 551 and the second portion 552 has higher rigidity at the end portion than at the central portion. Also, the strength with which the cleaning blade 55 is in contact with an outer peripheral surface of the transfer belt 53 is stronger at the end portion than at the central portion.
- the riding of the rib 531 is strongly prevented at the end portion of the cleaning blade 55 , and high cleaning performance is obtained by contact pressure suitable for cleaning the transfer belt 53 at the central portion of the cleaning blade 55 .
- the fourth exemplary embodiment is the same as the first exemplary embodiment except that a structure of the cleaning blade 55 is different, the description will be focused on differences from the first exemplary embodiment and a repetitive description will be omitted.
- FIG. 8 is a diagram schematically showing a structure around a cleaning blade according to the fourth exemplary embodiment of the present disclosure.
- the first portion 551 of the cleaning blade 55 has been subjected to surface treatment using, for example, diamond like carbon.
- the surface treatment hardens the surface of the first portion 551 and reduces friction with the transfer belt 53 . Accordingly, the cleaning blade 55 has a longer life.
- An end portion 556 of the first portion 551 has been subjected to the surface treatment in a region wider than a central portion 557 . Therefore, the end portion 556 of the first portion 551 has higher rigidity than the central portion 557 , and contact pressure with the outer peripheral surface of the transfer belt 53 is higher at the end portion 556 .
- the riding of the rib 531 is strongly prevented at the end portion of the cleaning blade 55 and the high cleaning performance is obtained by the contact pressure suitable for cleaning the transfer belt 53 at the central portion of the cleaning blade 55 .
- a removing member of the present disclosure extends to outsides of end portions of the rotary member of the present disclosure at both edges of the belt member of the present disclosure.
- the removing member of the present disclosure may extend to an outside of one of the end portions of the rotary member where, for example, the protrusion has a strong tendency of riding due to the walk.
- the belt driving device of the present disclosure is applied to the transfer device.
- the belt driving device of the present disclosure may be applied to a unit that drives the intermediate transfer belt or a device that drives the sheet transport belt.
- the color printer is shown as an exemplary embodiment of the image forming apparatus of the present disclosure.
- the image forming apparatus of the present disclosure may be a monochrome printer, or may be a copier, a facsimile, or a multifunction device.
- the electrophotographic image forming apparatuses have been described as examples. It is noted that the present disclosure is applicable to transfer devices and image forming apparatuses that are of types other than the electrophotographic type.
- the present disclosure may be applied to an inkjet image forming apparatus.
- the present disclosure may be applied to an image forming apparatus that draws an ink image on an intermediate transfer body using an ink ejection head and transfers the ink image from the intermediate transfer body onto a sheet.
- the inkjet image forming apparatus reduces impact and wind pressure from a sheet and prevents ink from spattering and moving on the intermediate transfer body.
- the present disclosure may be applied to an image forming apparatus of another type so long as the image forming apparatus transfers an image onto a recording material.
- the present disclosure may be applied to a belt member, other than a transfer belt, in an image forming apparatus.
- the present disclosure may be applied to a transport device between a transfer device and a fixing device.
- the present disclosure may be applied to a belt driving device other than an image forming apparatus.
- the present disclosure is made for the purpose of addressing the problems described in the “SUMMARY” section. It is noted that the configurations of the present disclosure are not prevented from being diverted to other purposes in a form that does not address the problem. A form in which any of the configurations of the present disclosure is diverted in this manner is also an exemplary embodiment of the present disclosure.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Cleaning In Electrography (AREA)
Abstract
Description
- This application is based on and claims priority under 35 USC 119 from Japanese Patent Application No. 2019-191933 filed Oct. 21, 2019.
- The present disclosure relates to a belt driving device, a transfer device, and an image forming apparatus.
- There are devices in which an annular belt member is wound around plural rotary members and driven. In order to prevent positions where the belt member is wound on the rotary members from moving in a direction along shafts of the rotary members, some of the devices have such a configuration that a protrusion (for example, a rib) extending along an edge of the belt member is provided.
- JP-A-2002-333779 discloses an image forming apparatus in which a transfer belt includes a rib in a circumferential direction at an end portion in a width direction in order to prevent the belt from shifting, and a stretch roller having the largest length, in the width direction, of a portion where the stretch roller is in contact with the transfer belt is a follower roller.
- Aspects of non-limiting embodiments of the present disclosure relate to preventing damage to a belt member caused by a protrusion riding on a rotary member.
- Aspects of certain non-limiting embodiments of the present disclosure address the above advantages and/or other advantages not described above. However, aspects of the non-limiting embodiments are not required to address the advantages described above, and aspects of the non-limiting embodiments of the present disclosure may not address advantages described above.
- According to an aspect of the present disclosure, there is provided a belt driving device including: an annular belt member; plural rotary members that extend in parallel and rotate, the belt member being wound around the rotary members, the belt member circulating; a protrusion that protrudes from an inner peripheral surface of the belt member, the protrusion extending along an edge of the belt member, the protrusion and each rotary member being arranged in an extending direction of the rotary member; and a removing member including a plate-shaped portion, in which the plate-shaped portion of the removing member is in contact with an outer peripheral surface of the belt member at a location where the removing member faces one of the rotary members with the belt member being interposed therebetween, so as to remove unnecessary matters from the outer peripheral surface of the belt member, and the removing member extends to an outside of end portions of the rotary members in the extending direction.
- Exemplary embodiment(s) of the present disclosure will be described in detail based on the following figures, wherein:
-
FIG. 1 is a schematic configuration diagram showing an image forming apparatus of a first exemplary embodiment; -
FIG. 2 is a side view schematically showing a structure of a secondary transfer unit; -
FIG. 3 is a top view schematically showing the structure of the secondary transfer unit; -
FIG. 4 is a diagram schematically showing a structure around a cleaning blade; -
FIG. 5 is a diagram schematically showing a structure around a cleaning blade according to a second exemplary embodiment of the present disclosure; -
FIG. 6 is a diagram showing a boundary position between a central portion and an end portion; -
FIG. 7 is a diagram schematically showing a structure around a cleaning blade according to a third exemplary embodiment of the present disclosure; and -
FIG. 8 is a diagram schematically showing a structure around a cleaning blade according to a fourth exemplary embodiment of the present disclosure. -
FIG. 1 is a schematic configuration diagram showing an image forming apparatus of a first exemplary embodiment. - An image forming apparatus 1 shown in
FIG. 1 is a so-called tandem color printer. A sheet P is used as a recording material in the image forming apparatus 1. Plastic paper or an envelope other than the sheet P may be employed as the recording material. In the following description, the sheet P is used as a representative of the recording material. - The image forming apparatus 1 includes four
image engines image engines 10Y, . . . , 10K forms a toner image by a so-called electrophotogmphic process. In each of theimage engines 10Y, . . . , 10K, the toner image of each color is formed on a corresponding one ofphotoconductor drums - The image forming apparatus 1 in the present exemplary embodiment employs an indirect transfer method, and includes an
intermediate transfer belt 30. The image forming apparatus 1 also includes asecondary transfer unit 50, afixing device 60, and asheet transport unit 80. - The
intermediate transfer belt 30 is an endless belt stretched oversupport rollers 31 to 35. Theintermediate transfer belt 30 circulates counterclockwise through theimage forming units secondary transfer unit 50. - The
image engines 10Y, . . . , 10K haveprimary transfer rollers primary transfer rollers photoconductor drums 11Y, . . . , 11K with theintermediate transfer belt 30 interposed therebetween. Theprimary transfer rollers 15Y, . . . , 15K cause the toner images on thephotoconductor drums 11Y, . . . , 11K to be electrostatically attracted to theintermediate transfer belt 30 by receiving a voltage. The toner images of the colors formed by theimage engines 10Y, . . . , 10K are sequentially transferred onto theintermediate transfer belt 30 in a superimposed manner by theprimary transfer rollers 15Y, . . . , 15K. As a result of such transfer, a color image is formed on theintermediate transfer belt 30. Theintermediate transfer belt 30 carries and moves the color image and transports the color image to thesecondary transfer unit 50. - The
secondary transfer unit 50 is provided such that theintermediate transfer belt 30 is interposed between thesecondary transfer unit 50 and abackup roller 34 that is one of thesupport rollers 31 to 35. Thesecondary transfer unit 50 transfers the color image with the sheet P being interposed between thesecondary transfer unit 50 and theintermediate transfer belt 30. - Sheets P are stored in a stacked state on a sheet tray T provided in a lower part of the image forming apparatus 1. The sheets P in the sheet tray T is taken out one by one from the sheet tray T by a
feeding roller 81 provided in thesheet transport unit 80 andretard rollers 82, and is transported along a transport path R bytransport rollers 83.Registration rollers 84 of thesheet transport unit 80 feed the sheet P to thesecondary transfer unit 50 in accordance with timing of transporting the color image by theintermediate transfer belt 30. - As will be described in detail below, the
secondary transfer unit 50 transfers the color image on theintermediate transfer belt 30 onto the sheet P by receiving a voltage. Thesecondary transfer unit 50 is an example of a belt driving device of the present disclosure, and is also an example of a transfer device of the present disclosure. The sheet P on which the color image is transferred by thesecondary transfer unit 50 is transported to thefixing device 60 by thesecondary transfer unit 50 and thetransport rollers 83 of thesheet transport unit 80. - A combination of the
image forming units intermediate transfer belt 30, and thesecondary transfer unit 50 corresponds to an example of an image forming unit according to the present disclosure. A combination of thesecondary transfer unit 50 and thesheet transport unit 80 corresponds to an example of a transport unit according to the present disclosure. - The
fixing device 60 fixes the color image on the sheet P by applying heat and pressure to the sheet P. The sheet P on which the color image is fixed by thefixing device 60 is fed to the outside of the image forming apparatus 1 bydelivery rollers 86 provided in thesheet transport unit 80. - The
secondary transfer unit 50 will be described in more detail below. -
FIGS. 2 and 3 are diagrams schematically showing a structure of the secondary transfer unit.FIG. 2 is a side view andFIG. 3 is a top view. For convenience of explanation,FIG. 3 shows the structure in which the inside of the secondary transfer unit is seen through. - The
secondary transfer unit 50 includes atransfer roller 51, aseparation roller 52, and anendless transfer belt 53 wound around thetransfer roller 51 and theseparation roller 52. Thesecondary transfer unit 50 is unitized by assembling elements in a transferunit support frame 501. Thetransfer roller 51 and theseparation roller 52 includerotation shafts rotation shafts unit support frame 501. Thetransfer roller 51 and theseparation roller 52 correspond to an example of plural rotary members of the present disclosure. Thetransfer belt 53 corresponds to an example of a belt member of the present disclosure. - The
transfer roller 51 is driven by atransfer motor 56 to rotate clockwise to drive thetransfer belt 53. Thetransfer belt 53 is a resin belt having low elasticity and circulates clockwise by receiving a driving force by thetransfer roller 53. - The
transfer roller 51 presses thetransfer belt 53 against theintermediate transfer belt 30 from the inside of thetransfer belt 53. When the sheet P is fed between thetransfer belt 53 and theintermediate transfer belt 30 pressed against each other, the sheet P is transported in a circulation direction while being interposed between thetransfer belt 53 and theintermediate transfer belt 30. Thetransfer roller 51 is connected to a power supply (not shown), and a transfer bias is applied to thetransfer roller 51 from the power supply. By the action of the transfer bias, the color image on theintermediate transfer belt 30 is transferred onto the sheet P while the sheet P passes between thetransfer belt 53 and theintermediate transfer belt 30. - The
separation roller 52 is a roller having a diameter smaller than that of thetransfer roller 51. Since theseparation roller 52 abruptly bends a traveling direction of thetransfer belt 53, a leading end of the sheet P placed on thetransfer belt 53 is separated from thetransfer belt 53. In the present exemplary embodiment, theseparation roller 52 is shorter in length than thetransfer roller 51 and rotates following movement of theintermediate transfer belt 30. - At edges of the
transfer belt 53,resin ribs 531 are provided. Theribs 531 prevent thetransfer belt 53 from falling off thetransfer roller 51. Therib 531 protrudes inward from an inner peripheral surface of thetransfer belt 53. Therib 531 extends in a movement direction of thetransfer belt 53 along the edge of thetransfer belt 53. Theribs 531 and thetransfer roller 51 are arranged in an extending direction of therotation shaft 511. Theribs 531 and theseparation roller 52 are arranged in an extending direction of therotation shaft 521. In the present exemplary embodiment, theribs 531 are provided on both sides of thetransfer belt 53 across thetransfer roller 51 and theseparation roller 52. Therib 531 corresponds to an example of a protrusion of the present disclosure. - The
secondary transfer unit 50 includes acleaning blade 55. An edge of thecleaning blade 55 is in contact with an outer peripheral surface of thetransfer belt 53. A position of thecleaning blade 55 is fixed with respect to the transferunit support frame 501. The edge of thecleaning blade 55 rubs against the outer peripheral surface of thetransfer belt 53 with the movement of thetransfer belt 53. The toner and other contaminants adhering to thetransfer belt 53 are rubbed by thecleaning blade 55 and scraped off from thetransfer belt 53. - The
cleaning blade 55 is provided at a position where thecleaning blade 55 faces thetransfer roller 51 with thetransfer belt 53 being interposed therebetween. Thecleaning blade 55 prevents theribs 531 of thetransfer belt 53 from riding on thetransfer roller 51. -
FIG. 4 is a diagram schematically showing a structure around the cleaning blade. - For convenience of description,
FIG. 4 shows a cross section of thetransfer roller 51 and thetransfer belt 53. - The
cleaning blade 55 includes a rubberfirst portion 551 having a plate-shaped outer shape, and a metalsecond portion 552 holding thefirst portion 551. An edge of thefirst portion 551 is in contact with the outer peripheral surface of thetransfer belt 53 to remove unnecessary matters. A length of thecleaning blade 55 in the extending direction of thetransfer roller 51 is longer than that of thetransfer roller 51. End portions of thecleaning blade 55 reach further outside than end portions of thetransfer roller 51. - The
transfer belt 53 is driven by thetransfer roller 51 to circulate as described above. Thetransfer belt 53 may deviate, that is, so called “walk” may occur. Due to the walk, a traveling position of thetransfer belt 53 during the circulation deviates in the extending direction of thetransfer roller 51 intersecting with the circulation direction.FIG. 4 shows a state in which thetransfer belt 53 deviates to the left side of the figure and comes close to a wall of the transferunit support frame 501 supporting therotation shaft 511. - When the
transfer belt 53 deviates in this manner, therib 531 comes into contact with the end portion of thetransfer roller 51 to reduce the deviation. In a case where thetransfer belt 53 largely deviates due to the walk, a part of therib 531 may ride on the end portion of thetransfer roller 51 while being in contact with the end portion of thetransfer roller 51. When therib 531 rides on thetransfer roller 51 in this manner, a force that pushes back thetransfer belt 53 acts such that the traveling position of thetransfer belt 53 returns toward a center of thetransfer belt 53. When therib 531 rides on thetransfer roller 51, a strong bending stress or the like is applied to thetransfer belt 53. Accordingly, thetransfer belt 53 may be damaged when therib 531 rides on thetransfer roller 51 repeatedly. - When the
rib 531 rides on thetransfer roller 51 frequently, the edge of thecleaning blade 55 is pushed up, which may cause a cleaning failure. - In the present exemplary embodiment, since the
cleaning blade 55 is long as described above, an edge portion of thetransfer belt 53 is pressed by the force with which the edge of thecleaning blade 55 is in contact with the outer peripheral surface of thetransfer belt 53, and riding of therib 531 onto thetransfer roller 51 is prevented. A location where thecleaning blade 55 presses thetransfer belt 53 is a part of the entire circumference of thetransfer belt 53. However, when thetransfer belt 53 deviates until therib 531 comes into contact with the end portion of thetransfer roller 51, the force that pushes back thetransfer belt 53 acts strongly at the location, and the traveling position of thetransfer belt 53 returns toward the center of thetransfer belt 53. Therefore, the frequency at which therib 531 rides on the end portion of thetransfer roller 51 is reduced. As a result, damage to thetransfer belt 53 is prevented and the cleaning failure is also prevented. - Since the
transfer roller 51 is a driving roller driven by thetransfer motor 56, a force that changes the traveling position of thetransfer belt 53 in the extending direction of thetransfer roller 51 is stronger than that of theseparation roller 52 that rotates following thetransfer belt 53. Since thecleaning blade 55 is provided at the position where thecleaning blade 55 faces such a driving roller, the force that pushes back thetransfer belt 53 strongly acts when therib 531 comes into contact with the end portion of thetransfer roller 51, and the riding of therib 531 is strongly prevented. - Since the
transfer roller 51 is a roller having a diameter larger than that of theseparation roller 52, the force that changes the traveling position of thetransfer belt 53 in the extending direction of thetransfer roller 51 is stronger than that of theseparation roller 52. Also, since thecleaning blade 55 is provided at the position where thecleaning blade 55 faces such a large-diameter roller, the force that pushes back thetransfer belt 53 strongly acts when therib 531 comes into contact with the end portion of thetransfer roller 51, and the riding of therib 531 is strongly prevented. - Further, since the
transfer roller 51 is a roller longer than theseparation roller 52, the force that changes the traveling position of thetransfer belt 53 in the extending direction of thetransfer roller 51 is stronger than that of theseparation roller 52. Also, since thecleaning blade 55 is provided at the position where thecleaning blade 55 faces such a long roller, the force that pushes back thetransfer belt 53 strongly acts when therib 531 comes into contact with the end portion of thetransfer roller 51, and the riding of therib 531 is strongly prevented. - Next, a second exemplary embodiment of the present disclosure will be described. Since the second exemplary embodiment is the same as the first exemplary embodiment except that a structure of the
cleaning blade 55 is different, the description will be focused on differences from the first exemplary embodiment and a repetitive description will be omitted. -
FIG. 5 is a diagram schematically showing a structure around a cleaning blade according to the second exemplary embodiment of the present disclosure. - In the second exemplary embodiment, a shape of a
second portion 552 of thecleaning blade 55 is different from that of the first exemplary embodiment. That is, thesecond portion 552 at anend portion 553 in the extending direction of thetransfer roller 51 protrudes toward thetransfer belt 53 and a distance between thesecond portion 552 and thetransfer belt 53 is shorter at theend portion 553 than that at acentral portion 554. That is, protrusion of thefirst portion 551 toward thetransfer belt 53 is smaller at theend portion 553 than at thecentral portion 554. - As a result, rigidity of the
cleaning blade 55 including thefirst portion 551 and thesecond portion 552 is higher at theend portion 553 than that at thecentral portion 554. Also, the strength with which thecleaning blade 55 is in contact with an outer peripheral surface of thetransfer belt 53 is stronger at theend portion 553 than that at thecentral portion 554. Therefore, the riding of therib 531 is strongly prevented at theend portion 553, and high cleaning performance is obtained by contact pressure suitable for cleaning thetransfer belt 53 at thecentral portion 554. - Here, a boundary position between the
central portion 554 and theend portion 553 will be discussed. -
FIG. 6 is a diagram showing a boundary position between a central portion and an end portion. - A boundary B between the
central portion 554 and theend portion 553 is located near an end portion of thetransfer roller 51 in the extending direction of thetransfer roller 51. More specifically, on the basis of a position P0 at the end portion of thetransfer roller 51, the boundary B is located on an inner side of a first location P1. The first location P1 is located on an outer side of the position P0 of the end portion and at a distance d from the position P0. The distance d is equal to a width d of therib 531. Accordingly, thecleaning blade 55 is in strong contact with the outer peripheral surface of thetransfer belt 53 at a location where therib 531 rides on thetransfer roller 51, and the riding of therib 531 is strongly prevented. - Further, on the basis of the position P0 of the end portion of the
transfer roller 51, the boundary B is located on an outer side of a second location P2. The second location P2 is located on an inner side of the position P0 of the end portion and at the distance d, which is equal to the width of therib 531, from the position P0. Accordingly, thecleaning blade 55 is in contact with the outer peripheral surface of thetransfer belt 53 with a strength suitable for cleaning, at a location where contribution of therib 531 to the prevention of riding is low, and high cleaning performance is obtained. - Next, a third exemplary embodiment of the present disclosure will be described. Since the third exemplary embodiment is the same as the first exemplary embodiment except that a structure of the
cleaning blade 55 is different, the description will be focused on differences from the first exemplary embodiment and a repetitive description will be omitted. -
FIG. 7 is a diagram schematically showing a structure around a cleaning blade according to the third exemplary embodiment of the present disclosure. - In the third exemplary embodiment, a shape of the
first portion 551 of thecleaning blade 55 is different from that of the first exemplary embodiment. That is, in thefirst portion 551, a thickness of anend portion 555 is larger than the other portions (that is, a central portion). As a result, thefirst portion 551 has higher rigidity at theend portion 555 than at the central portion. Thecleaning blade 55 including thefirst portion 551 and thesecond portion 552 has higher rigidity at the end portion than at the central portion. Also, the strength with which thecleaning blade 55 is in contact with an outer peripheral surface of thetransfer belt 53 is stronger at the end portion than at the central portion. - Accordingly, in the third exemplary embodiment, similarly to the second exemplary embodiment, the riding of the
rib 531 is strongly prevented at the end portion of thecleaning blade 55, and high cleaning performance is obtained by contact pressure suitable for cleaning thetransfer belt 53 at the central portion of thecleaning blade 55. - Next, a fourth exemplary embodiment of the present disclosure will be described. Since the fourth exemplary embodiment is the same as the first exemplary embodiment except that a structure of the
cleaning blade 55 is different, the description will be focused on differences from the first exemplary embodiment and a repetitive description will be omitted. -
FIG. 8 is a diagram schematically showing a structure around a cleaning blade according to the fourth exemplary embodiment of the present disclosure. - In the fourth exemplary embodiment, the
first portion 551 of thecleaning blade 55 has been subjected to surface treatment using, for example, diamond like carbon. The surface treatment hardens the surface of thefirst portion 551 and reduces friction with thetransfer belt 53. Accordingly, thecleaning blade 55 has a longer life. Anend portion 556 of thefirst portion 551 has been subjected to the surface treatment in a region wider than acentral portion 557. Therefore, theend portion 556 of thefirst portion 551 has higher rigidity than thecentral portion 557, and contact pressure with the outer peripheral surface of thetransfer belt 53 is higher at theend portion 556. - Accordingly, in the fourth exemplary embodiment, similarly to the second exemplary embodiment, the riding of the
rib 531 is strongly prevented at the end portion of thecleaning blade 55 and the high cleaning performance is obtained by the contact pressure suitable for cleaning thetransfer belt 53 at the central portion of thecleaning blade 55. - The above description shows the examples in which a removing member of the present disclosure extends to outsides of end portions of the rotary member of the present disclosure at both edges of the belt member of the present disclosure. Alternatively, the removing member of the present disclosure may extend to an outside of one of the end portions of the rotary member where, for example, the protrusion has a strong tendency of riding due to the walk.
- The above description shows the examples in which the belt driving device of the present disclosure is applied to the transfer device. Alternatively, the belt driving device of the present disclosure may be applied to a unit that drives the intermediate transfer belt or a device that drives the sheet transport belt.
- In the above description, the color printer is shown as an exemplary embodiment of the image forming apparatus of the present disclosure. Alternatively, the image forming apparatus of the present disclosure may be a monochrome printer, or may be a copier, a facsimile, or a multifunction device.
- In the above exemplary embodiments, the electrophotographic image forming apparatuses have been described as examples. It is noted that the present disclosure is applicable to transfer devices and image forming apparatuses that are of types other than the electrophotographic type. For example, the present disclosure may be applied to an inkjet image forming apparatus. Specifically, the present disclosure may be applied to an image forming apparatus that draws an ink image on an intermediate transfer body using an ink ejection head and transfers the ink image from the intermediate transfer body onto a sheet. As in the electrophotographic image forming apparatus, the inkjet image forming apparatus reduces impact and wind pressure from a sheet and prevents ink from spattering and moving on the intermediate transfer body.
- The present disclosure may be applied to an image forming apparatus of another type so long as the image forming apparatus transfers an image onto a recording material.
- The present disclosure may be applied to a belt member, other than a transfer belt, in an image forming apparatus. For example, the present disclosure may be applied to a transport device between a transfer device and a fixing device.
- The present disclosure may be applied to a belt driving device other than an image forming apparatus.
- The present disclosure is made for the purpose of addressing the problems described in the “SUMMARY” section. It is noted that the configurations of the present disclosure are not prevented from being diverted to other purposes in a form that does not address the problem. A form in which any of the configurations of the present disclosure is diverted in this manner is also an exemplary embodiment of the present disclosure.
- The foregoing description of the exemplary embodiments of the present disclosure has been provided for the purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure to the precise forms disclosed. Obviously, many modifications and variations will be apparent to practitioners skilled in the art. The embodiments were chosen and described in order to best explain the principles of the disclosure and its practical applications, thereby enabling others skilled in the art to understand the disclosure for various embodiments and with the various modifications as are suited to the particular use contemplated. It is intended that the scope of the disclosure be defined by the following claims and their equivalents.
Claims (17)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019-191933 | 2019-10-21 | ||
JP2019191933A JP7390564B2 (en) | 2019-10-21 | 2019-10-21 | Band drive device, transfer device, and image forming device |
Publications (1)
Publication Number | Publication Date |
---|---|
US20210114830A1 true US20210114830A1 (en) | 2021-04-22 |
Family
ID=75492116
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/851,542 Abandoned US20210114830A1 (en) | 2019-10-21 | 2020-04-17 | Belt driving device, transfer device, and image forming apparatus |
Country Status (2)
Country | Link |
---|---|
US (1) | US20210114830A1 (en) |
JP (1) | JP7390564B2 (en) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05333753A (en) * | 1992-05-28 | 1993-12-17 | Yokohama Rubber Co Ltd:The | Cleaning blade |
JP2009258483A (en) * | 2008-04-18 | 2009-11-05 | Sharp Corp | Cleaning device and image forming apparatus using the same |
JP2018049088A (en) * | 2016-09-20 | 2018-03-29 | 株式会社リコー | Cleaning blade, cleaning device, image forming apparatus, and method for manufacturing cleaning blade |
-
2019
- 2019-10-21 JP JP2019191933A patent/JP7390564B2/en active Active
-
2020
- 2020-04-17 US US16/851,542 patent/US20210114830A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
JP2021067768A (en) | 2021-04-30 |
JP7390564B2 (en) | 2023-12-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20180348675A1 (en) | Intermediate transfer unit and image forming apparatus including the same | |
US8761657B2 (en) | Image forming apparatus | |
JP2002326733A (en) | Belt conveyor device and image forming device | |
US20210114830A1 (en) | Belt driving device, transfer device, and image forming apparatus | |
US9676580B2 (en) | Recording-medium ejecting device and image forming apparatus | |
US20150234327A1 (en) | Cleaning device and image forming apparatus | |
US10919719B1 (en) | Belt driving device and transfer device | |
US8824916B2 (en) | Belt conveyor member and image forming apparatus | |
US8340547B2 (en) | Cleaning device, image forming apparatus including the same and cleaning method | |
JP5401887B2 (en) | Image forming apparatus | |
JP3261095B2 (en) | Sheet conveying device and image forming apparatus provided with the sheet conveying device | |
US20170355546A1 (en) | Sheet conveyance device and image forming apparatus | |
JP2004257403A (en) | Rotation speed control device, endless belt device, and image forming device | |
JP4225202B2 (en) | Image forming apparatus | |
US11106159B2 (en) | Belt driving device, transfer device, and image forming apparatus | |
JP6051914B2 (en) | Sheet conveying apparatus, sheet feeding apparatus, and image forming apparatus | |
US10509343B2 (en) | Belt driving device and image forming apparatus | |
JP3589859B2 (en) | Charging device | |
JP2005316257A (en) | Image forming apparatus and endless belt | |
JP2017032643A (en) | Transfer unit and image forming apparatus provided with the same | |
JP2006220998A (en) | Image forming apparatus | |
JP2008180978A (en) | Image forming apparatus | |
JP6555515B2 (en) | Image forming apparatus | |
JP4735336B2 (en) | Image forming apparatus | |
JP2021060496A (en) | Belt driving device and image forming apparatus including the same |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: FUJI XEROX CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TANAKA, DAISUKE;REEL/FRAME:052427/0789 Effective date: 20200407 |
|
AS | Assignment |
Owner name: FUJIFILM BUSINESS INNOVATION CORP., JAPAN Free format text: CHANGE OF NAME;ASSIGNOR:FUJI XEROX CO., LTD.;REEL/FRAME:056092/0913 Effective date: 20210401 |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: FINAL REJECTION MAILED |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: ADVISORY ACTION MAILED |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |