EP2963502B1 - Bilderzeugungsvorrichtung - Google Patents

Bilderzeugungsvorrichtung Download PDF

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Publication number
EP2963502B1
EP2963502B1 EP15173498.5A EP15173498A EP2963502B1 EP 2963502 B1 EP2963502 B1 EP 2963502B1 EP 15173498 A EP15173498 A EP 15173498A EP 2963502 B1 EP2963502 B1 EP 2963502B1
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EP
European Patent Office
Prior art keywords
developer
toner
image forming
image
controller
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.)
Active
Application number
EP15173498.5A
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English (en)
French (fr)
Other versions
EP2963502A2 (de
EP2963502A3 (de
Inventor
Yusuke Ishizuka
Takeshi Shintani
Nobuo Kuwabara
Kenji Honjoh
Yasuhito Kuboshima
Yasuhiro Maehata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP2015010418A external-priority patent/JP2016066040A/ja
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Publication of EP2963502A2 publication Critical patent/EP2963502A2/de
Publication of EP2963502A3 publication Critical patent/EP2963502A3/de
Application granted granted Critical
Publication of EP2963502B1 publication Critical patent/EP2963502B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/10—Collecting or recycling waste developer
    • G03G21/105—Arrangements for conveying toner waste

Definitions

  • Embodiments of the present invention generally relate to an image forming apparatus, such as a copier, a printer, a facsimile machine, or a multifunction peripheral having at least two of copying, printing, facsimile transmission, plotting, and scanning capabilities.
  • an image forming apparatus such as a copier, a printer, a facsimile machine, or a multifunction peripheral having at least two of copying, printing, facsimile transmission, plotting, and scanning capabilities.
  • printers and facsimile machines to output electronic data and image processing apparatus, such as scanners, to convert information into electronic data are widely used.
  • image processing apparatus often includes imaging, image forming, and communicating capabilities and configured as a multifunction peripheral (MFP) to be used as a printer, a facsimile machine, a scanner, and a copier.
  • MFP multifunction peripheral
  • an image bearer such as a photoconductor is exposed to light to form an electrostatic latent image thereon, the electrostatic latent image is developed with toner into a toner image, and the toner image is transferred onto a recording medium such as a sheet of paper.
  • electrophotographic image forming apparatuses that include a waste-toner conveyance structure to collect and transport toner remaining on the image bearer.
  • the image bearer includes a conveyor belt to transport the toner image before the toner image is transferred onto the sheet. The collected toner is either reused or discharged.
  • the waste toner is discharged in a waste-toner container connected to the waste-toner conveyance structure.
  • a temporary container to store the waste toner may be provided in an image forming apparatus so that image formation can be continued for a given amount even when the waste-toner container is not connected to the apparatus.
  • a counter counts the time period during which images are output in the state in which the waste-toner container is removed, and image output is compulsively stopped when the count value reaches a threshold.
  • JP-2011-215593-A to properly set the timing of compulsive stop of image output, it is necessary to properly set the threshold of the count value.
  • the threshold is set based on the amount per unit time of waste toner transported to the temporary container in accordance with flow properties of waste toner.
  • image forming apparatuses in which multiple different type toners different in flow properties are usable.
  • toners in addition to cyan, magenta, yellow, and black toners, special toners such as transparent toner and white toner are used. It is possible that the special toner is different in flow properties from the cyan, magenta, yellow, and black toners.
  • JP 2014-095819 A describes an image forming apparatus capable of suppressing a transfer pipe transferring waste toner up to a container from being clogged with the waste toner, even when the replacement work of the container storing the waste toner is performed during the performance of an image forming operation.
  • the image forming apparatus includes an image output part outputting a toner image to a recorded material, a collection part collecting toner being unnecessary in the image output part as the waste toner, a detachable container storing the collected waste toner, the transfer pipe disposed in such a state that the collection part and the container are connected and transferring the collected waste toner to the container, an opening and closing member opening and closing a discharge port of the transfer pipe, in accordance with the attachment and detachment operation of the container, a conveyance member rotated in the transfer pipe, to convey the waste toner toward the discharge port, and control means for changing the rotational speed of the conveyance member to a speed lower than the rotational speed before the container is detached, when the container is detached during the operation of the image output part and the conveyance member.
  • An object of the invention is to control accumulation of developer in a temporary container in an electrophotographic image forming apparatus in which multiple different developer types are usable.
  • an image forming apparatus in which multiple different type developers are usable.
  • the image forming apparatus includes an image forming unit to form an image on an image bearer with developer; a cleaning device to collect developer from the image bearer; a collected developer passage through which developer collected by the cleaning device is transported; a rotatable developer conveyor disposed in the collected developer passage to transport the collected developer therein; a temporary developer container connected to the collected developer passage, to temporarily store the collected developer; a waste-toner container removably connected to the temporary developer container; and a controller to control conveyance of the collected developer from the cleaning device.
  • the controller refers to a developer type database in which each of the multiple different type developers is correlated with a conveyance condition to transport the collected developer, and one of the multiple different type developers is set as the target developer. The controller changes the conveyance condition according to the developer type database when a content of an image output job indicates that a target developer is used.
  • output of images are controlled in a state in which a container to contain developer to be disposed is removed from the image forming apparatus.
  • FIG. 1 is a schematic block diagram of a hardware configuration of an image forming apparatus 1 according to the present embodiment.
  • the image forming apparatus 1 employs a tandem system including multiple photoconductor drums, and different type toners are usable.
  • the image forming apparatus 1 is similar in hardware configuration to typical data processing devices such as computers and servers. That is, the image forming apparatus 1 includes a central processing unit (CPU) 10, a random access memory (RAM) 20, a read only memory (ROM) 30, a hard disk drive (HDD) 40, and an interface (I/F) 50, which are connected to each other via a bus 90. Further, a liquid crystal display (LCD) 60, serving as a display, a control panel 70, and dedicated devices 80 are connected to an interface 50.
  • CPU central processing unit
  • RAM random access memory
  • ROM read only memory
  • HDD hard disk drive
  • I/F interface
  • LCD liquid crystal display
  • the CPU 10 is a computation device and controls actions of the entire image forming apparatus 1.
  • the RAM 20 is a volatile memory capable of high-speed data reading and writing.
  • the RAM 20 is used as workspace when the CPU 10 processes data.
  • the ROM 30 is a non-volatile storage medium dedicated to reading out and stores programs such as firmware.
  • the HDD 40 is a non-volatile storage medium capable of data reading and writing, and an operating system (OS), various types of control programs, application programs, and the like are stored therein.
  • OS operating system
  • the interface 50 connects the bus 90 to the various types of hardware and networks and controls the bus 90, the hardware, and the networks.
  • the LCD 60 is a visual user interface for users to check a status of the image forming apparatus 1.
  • the control panel 70 is a user interface for users to input data to the image forming apparatus 1 and includes a keyboard, a mouse, and the like.
  • the dedicated devices 80 are hardware to realize dedicated capabilities in the image forming apparatus 1 and correspond to a printing engine 160 to execute image output, a scanner 120 to read documents, and the like.
  • the CPU 10 executes computation according to programs read out into the RAM 20 from the ROM 30, the HDD 40, or recording media such as optical disks. Then, control software is implemented. With the implement control software and the above-described hardware configuration, a function block for the capabilities of the image forming apparatus 1 is configured.
  • FIG. 2 is a schematic block diagram of the functional configuration of the image forming apparatus 1.
  • the image forming apparatus 1 includes a controller 100, an automatic document feeder (ADF) 110, the scanner 120, a document tray 130, a display panel 140, a sheet feeding table 150, the printing engine 160, an output tray 170, and a network interface (I/F) 180.
  • ADF automatic document feeder
  • I/F network interface
  • the controller 100 includes a main controller 101, an engine controller 102, an input/output (1/0) controller 103, an image processor 104, and a display controller 105.
  • the image forming apparatus 1 is a multifunction peripheral including the scanner 120 and the printing engine 160. It is to be noted that, in FIG. 2 , solid liens represent electrical connections, and broken lines represent flow of sheets.
  • the display panel 140 serves as both of an output interface to visually display the state of the image forming apparatus 1 and an input interface (i.e., a control panel) such as a touch panel for users to directly operate the image forming apparatus 1 or input data into the image forming apparatus 1.
  • the network interface 180 in an interface for the image forming apparatus 1 to communicate with other devices. Examples usable as the network interface 180 include Ethernet® and USB (Universal Serial Bus) interfaces.
  • the controller 100 is configured by a combination of software and hardware as described above.
  • the controller 100 controls the image forming apparatus 1 entirely.
  • the main controller 101 controls, that is, gives commands to, respective units of the controller 100.
  • the engine controller 102 controls or drives driving units such as the printing engine 160, the scanner 120, and the like.
  • the I/O controller 103 inputs signals and commands received via the network interface 180 and networks to the main controller 101.
  • the main controller 101 controls the I/O controller 103 and accesses other devices via the network interface 180.
  • the image processor 104 is governed by the main controller 101 and generates drawing data according to print data included in input print jobs, which are commands to execute image output.
  • the drawing data means data for the printing engine 160 to draw images in image formation.
  • the drawing data is pixel data, that is, bit map data, in which the image to be output is expressed as data per pixel.
  • the print data included in print jobs means data in a data format recognizable by the image forming apparatus 1, converted by printer drivers installed in data processing devices such as computers.
  • the print data is described in PDL (Page Description Language).
  • the print data is page data in which data of the page to be output is described.
  • An aspect of the present embodiment is generation of the drawing data according to the image processor 104, in particular, allocation of processing for efficient operation of the hardware of the image forming apparatus 1.
  • the function of the image processor 104 is described in detail later.
  • the display controller 105 causes the display panel 140 to display data or reports, to the main controller 101, data input thereto via the display panel 140.
  • the I/O controller 103 receives a print job via the network interface 180.
  • the I/O controller 103 forwards the print job to the main controller 101.
  • the main controller 101 causes the image processor 104 to generate drawing data according to the print data included in the print job.
  • the engine controller 102 causes the printing engine 160 to form an image on the sheet transported from the sheet feeding table 150.
  • the printing engine 160 serves as an image forming device.
  • the printing engine 160 is an electrophotographic image forming device. After the printing engine 160 forms an image thereon, the sheet is ejected to the output tray 170.
  • the image processor 104 when the image forming apparatus 1 operates as a copier, the image processor 104 generates drawing data based on the scanned data received by the engine controller 102 from the scanner 120 or data generated from the print job. According to the drawing data, the engine controller 102 drives the printing engine 160 similar to printing.
  • FIG. 3 is a schematic side view of the printing engine 160 according to the present embodiment. It is to be noted that the suffixes Y, M, C, K, and P attached to each reference numeral indicate only that components indicated thereby are used for forming yellow, magenta, cyan, black, and special toner images, respectively.
  • the printing engine 160 shown in FIG. 3 is a so-called tandem system and includes image forming units 206Y, 206M, 206C, 206K, and 206P for respective colors, arranged along a conveyor belt 205 that is an endless belt.
  • the multiple image forming units (electrophotographic process units) 206Y, 206M, 206C, 206K, and 206P (hereinafter collectively "image forming units 206") are arranged in that order from the upstream side in the direction in which the conveyor belt 205 transports the image.
  • images 204 of recording media are fed from the sheet feeding table 150 by a sheet feeding roller 202.
  • the conveyor belt 205 which is an intermediate transfer belt and an image bearer as well, an intermediate-transfer image to be transferred onto the sheet 204 is formed.
  • a pair of registration rollers 203 stops the sheet 204 fed from the sheet feeding table 150 and forwards the sheet 204 to a secondary transfer position where the image is transferred from the conveyor belt 205, timed to coincide with image formation in the image forming units 206.
  • the multiple image forming units 206 have a similar configuration except the color of toner images formed thereby.
  • the image forming unit 206K forms black toner images
  • the image forming unit 206M forms magenta toner images
  • the image forming unit 206C forms cyan toner images
  • the image forming unit 206Y forms yellow toner images
  • the image forming unit 206P forms special color toner images.
  • special color used in this specification means a color used for a purpose such as image quality improvement and a color other than cyan, magenta, yellow, and black.
  • image forming unit 206Y is described in detail below as a representative since the image forming units 206Y, 206M, 206C, 206K, and 206P are similar in configuration. Thus, and descriptions of other image forming units 206M, 206C, 206K, and 206P, given subscripts "M”, “C”, “K”, and “P”, instead of "Y" in the drawings, are omitted.
  • the conveyor belt 205 is an endless belt looped around a driving roller 207 and a driven roller 208.
  • a driving motor rotates the driving roller 207.
  • the driving motor, the driving roller 207, and the driven roller 208 together constitute a driving unit to drive the conveyor belt 205.
  • the image forming unit 206Y is the first to transfer toner images onto the conveyor belt 205.
  • the image forming unit 206Y includes a photoconductor drum 209Y and components disposed around the photoconductor drum 209Y, namely, a charging device 210Y, an optical writing device 211, a developing device 212Y, a cleaning device 213Y, and a discharger.
  • the optical writing device 211 directs light to the photoconductor drum 209Y, 209M, 209C, 209K, and 209P (collectively "photoconductor drums 209").
  • the charging device 210Y charges uniformly the outer circumferential face of the photoconductor drum 209Y in the dark, after which the optical writing device 211 directs light from a light source corresponding to a yellow image to the photoconductor drum 209Y, thus forming an electrostatic latent image thereon.
  • the developing device 212Y develops the electrostatic latent image with yellow toner, thus forming a yellow toner image on the photoconductor drum 209Y.
  • the toner image is transferred by a transfer device 215Y onto the conveyor belt 205 at a primary transfer position (a primary transfer nip) where the photoconductor drum 209Y contacts or is closest to the conveyor belt 205.
  • a primary transfer position (a primary transfer nip) where the photoconductor drum 209Y contacts or is closest to the conveyor belt 205.
  • the yellow toner image is formed on the conveyor belt 205.
  • the cleaning device 213Y removes toner remaining on the outer circumferential face of the photoconductor drum 209Y, and the discharger discharges the outer circumferential face of the photoconductor drum 209Y. Then, the photoconductor drum 209Y is on standby for subsequent image formation.
  • the discharger is disposed upstream from the cleaning device 213Y in the direction in which the photoconductor drum 209Y rotates.
  • the cleaning device 213Y is not limited to a blade but may be a brush.
  • the yellow toner image formed on the conveyor belt 205 by the image forming unit 206Y is transported to the image forming unit 206M as the conveyor belt 205 is rotated by the rollers.
  • the image forming unit 206M performs image forming processes similar to those performed by the image forming unit 206Y, thereby forming a magenta toner image on the photoconductor drums 209M, and the magenta toner image is transferred and superimposed on the yellow toner image.
  • the yellow and magenta toner images on the conveyor belt 205 are further transported to the image forming units 206C, 206K, and 206P, where cyan, black, and special toner images are formed on the photoconductor drums 209C, 209K, and 209P respectively, and the cyan, black, and special images are transferred on the superimposed toner image on the conveyor belt 205.
  • an intermediate image in which a full color image is superimposed with special toner is formed on the conveyor belt 205.
  • the sheets 204 contained in the sheet feeding table 150 are sent out from the top sequentially. At a position where a sheet conveyance route leading therefrom is closest to a transfer roller 217, the intermediate toner image is transferred from the conveyor belt 205 onto the sheet 204. Thus, an image is formed on the sheet 204, The sheet 204 carrying the image is transported to a fixing device 216, where the image is fixed on the sheet 204. Then, the sheet 204 is discharged outside the image forming apparatus 1.
  • the conveyor belt 205 is provided with a belt cleaner 218.
  • the cleaning devices 213, the belt cleaner 218, or both serve as cleaning devices to collect toner from an image bearer.
  • the belt cleaner 218 can include a cleaning blade pressed against the conveyor belt 205 to scrape off toner from the surface of the conveyor belt 205 at a position downstream from the transfer roller 217 and upstream from the photoconductor drums 209 in the direction in which the conveyor belt 205 rotates (in the direction indicated by arrows indicating the direction of rotation of the driving roller 207 and the driven roller 208) as shown in FIG. 3 .
  • the belt cleaner 218 serves as the cleaning device to collect developer.
  • the belt cleaner 218 is not limited to the blade but may be a brush.
  • FIG. 4 is a schematic view of the structure for waste toner in the printing engine 160 according to the present embodiment.
  • the cleaning devices 213Y, 213M, 213C, 213K, and 213P are connected to a first waste-toner channel 221, and the waste toner collected from the photoconductor drums 209 by the cleaning devices 213Y, 213M, 213C, 213K, and 213P is forwarded to the first waste-toner channel 221.
  • the belt cleaner 218 is connected to a second waste-toner channel 222, and the waste toner collected from the conveyor belt 205 by the belt cleaner 218 is forwarded to the second waste-toner channel 222.
  • the first waste-toner channel 221 and the second waste-toner channel 222 are connected to a third waste-toner channel 223.
  • the waste toner is transported from the first and second waste-toner channels 221 and 222 by conveying screws 92A and 92B serving as rotatable developer conveyors provided therein to the third waste-toner channel 223.
  • the rotatable toner conveyors are not limited to screws but can be coils, augers, paddles, or the like.
  • the third waste-toner channel 223 is connected to a fourth waste-toner channel 224.
  • the waste toner is transported from the third waste-toner channel 223 by a conveying screw serving as a rotatable developer conveyor disposed therein to the fourth waste-toner channel 224.
  • the first, second, third, and fourth waste-toner channels 221, 222, 223, and 224 together serve as a collected developer passage 220 through which collected developer collected by the cleaning devices 213, the belt cleaner 218, or both is transported.
  • each of the first, second, third, and fourth waste-toner channels 221, 222, 223, and 224 can be a tube or pile, but the shape is not necessarily cylindrical but can be square or polygonal.
  • the fourth waste-toner channel 224 is connected to a temporary reservoir 225 inside the printing engine 160 (i.e., the image forming apparatus 1).
  • the waste toner is transported from the fourth waste-toner channel 224 to the temporary reservoir 225 by a conveying screw 92C serving as a rotatable developer conveyor disposed in the fourth waste-toner channel 224.
  • the temporary reservoir 225 is connectable to a waste-toner bottle 226, serving as a waste-toner container.
  • the waste-toner bottle 226 is connected thereto, the waste toner is transported from the temporary reservoir 225 by a discharge screw 92D to the waste-toner bottle 226.
  • the temporary reservoir 225 temporarily stores the waste toner in a state in which the waste-toner bottle 226 is not connected thereto.
  • the conveying screws 92A, 92B, and 92C are also collectively referred to as "conveying screws 92".
  • special toner is used in addition to standard color toners (i.e., process toners) of yellow (Y), cyan (C), magenta (M), and black (K) toners.
  • the type of toner is different between the special toner and cyan, magenta, yellow, and black toners.
  • polymerization toner is used for cyan, magenta, yellow, and black toners; and pulverization toner is used for the special toner.
  • pulverization toner particles are more uniform in size and advantageous in improving image quality.
  • pulverization toner physically interferes with a component strongly, and removal of pulverized toner is easier.
  • flow properties of toner or developer means ease of transport of toner or developer by the rotatable developer conveyor, and differences in flow properties are represented by differences in the weight of toner transported per unit time under similar conditions (i.e., screw rotation speed and the like).
  • FIG. 5 is a schematic cross-sectional view illustrating polymerization toner, for example, in the first waste-toner channel 221, in the collected developer passage 220.
  • polymerization toner is relatively uniform in particle shape and spherical. Accordingly, polymerization toner is dense in the collected developer passage 220 and more easily transported by the conveying screw.
  • FIG. 6 is a schematic cross-sectional view illustrating pulverization toner in the collected developer passage 220.
  • pulverization toner is less uniform in particle shape. Accordingly, pulverization toner is less dense in the collected developer passage 220 and is not transported easily. In other words, when the waste toner is pulverization toner, transport of waste toner through the collected developer passage 220 to the temporary reservoir 225 tends to be slow (i.e., the amount of transported per unit time is small). Thus, the difference in flow properties results in differences in the amount of waste toner transported to the temporary reservoir 225 in a given period.
  • FIG. 7 is a schematic cross-sectional view of the temporary reservoir 225 when polymerization toner is contained therein. As illustrated in FIG. 7 , in the case of polymerization toner, which is better in flow properties, a greater amount of waste toner is transported per unit time, and it is possible that the temporary reservoir 225 is filled to capacity with waste toner in a shorter length of time.
  • FIG. 8 is a schematic cross-sectional view of the temporary reservoir 225 when pulverization toner is contained therein. As illustrated in FIG. 8 , in the case of pulverization toner, which is poorer in flow properties, a smaller amount of waste toner is transported per unit time, and the temporary reservoir 225 is not filled to capacity within the time sufficient for the temporary reservoir 225 to be filled to capacity with polymerization toner.
  • waste toner When image formation is successively executed in a state in which the waste-toner bottle 226 illustrated in FIG. 4 is not connected to the temporary reservoir 225, waste toner accumulates in the temporary reservoir 225. If waste toner is continuously transported to the temporary reservoir 225 filled to capacity with waste toner, there is a risk of damage to the apparatus, such as damage to the conveying screws 92 disposed in the collected developer passage 220 or the conveying screw disposed in the temporary reservoir 225. To inhibit such a risk, it is necessary to control the apparatus not to execute image formation after the temporary reservoir 225 is filled to capacity when image formation is continued in a state in which the waste-toner bottle 226 is not connected to the temporary reservoir 225.
  • Such control is relatively easy when the amount of waste toner in the temporary reservoir 225 is directly detectable using a sensor.
  • the use of a sensor increases the size and cost of the apparatus.
  • the amount of waste toner in the temporary reservoir 225 can be estimated by counting the length of time during which the conveying screws 92 in the collected developer passage 220 is driven, and the above-described control is feasible without the sensor.
  • the amount of waste toner in the temporary reservoir 225 is not accurately estimated by simply counting the driving time of the conveying screws 92 in the collected developer passage 220 in the case where multiple different type toners are used in the apparatus and the type of toner used changes depending on contents of print jobs as described above with reference to FIGS. 5 through 8 .
  • the amount of waste toner in the temporary reservoir 225 is recognized as follows.
  • FIG. 9 is a block diagram of circuitry to control conveyance of waste toner in the controller 100 of the image forming apparatus 1 according to the present embodiment.
  • the main controller 101 includes a job manager 111, a job checker 112, a toner type input 113, a setting data memory 114, and a waste-toner conveyance setting unit 115.
  • the engine controller 102 includes a waste-toner conveyance controller 121, a counter 122, and a bottle detector 123.
  • the job manager 111 acquires a print job and controls image output. Referring to the contents of the print job acquired by the job manager 111, the job checker 112 ascertains the type of toner used in the print job. The job checker 112 according to the present embodiment determines whether the special toner (i.e., a target developer) used in the image forming unit 206P is used for the print job.
  • the special toner i.e., a target developer
  • the toner type input 113 accepts setting of toner different in flow properties according to an input made by the user on the display panel 140.
  • the toner used in the image forming unit 206P is poorer in flow properties than cyan, magenta, yellow, and black toners.
  • the setting data memory 114 stores a toner type database, which may be preliminarily established. Further, according to the setting by the toner type input 113, the setting data memory 114 retrieves, from the toner type database, data to be referred to in the control operation.
  • FIG. 10 is an example of the toner type database.
  • the toner type database includes "toner type", “flow property”, “conveyance speed”, and “threshold”.
  • “Toner type” is information to distinguish one out of the multiple different type toners usable in the image forming apparatus 1.
  • Flow property is data to indicate whether the flow property is good or poor regarding each toner type.
  • Conveyance speed means a conveyance speed setting at which each toner type is to be conveyed as waste toner (i.e., a conveyance condition).
  • “Threshold” means a threshold as a criterion, set for each toner type, to determine that the temporary reservoir 225 is filled to capacity.
  • Conveyance speed "threshold”, or both serve as conveyance conditions.
  • Toner C is the special toner (target developer) as enclosed with broken lines in FIG. 10 .
  • the user inputs use of Toner C on the display panel 140.
  • the toner type input 113 reports that Toner C is selected to the setting data memory 114.
  • the waste-toner conveyance setting unit 115 reports the conveyance speed setting according to the result generated by the job checker 112.
  • the waste-toner conveyance setting unit 115 retrieves the record of Toner C from the database illustrated in FIG. 10 , stored in the setting data memory 114.
  • the waste-toner conveyance setting unit 115 reports the record of toner type to the engine controller 102.
  • the waste-toner conveyance controller 121 controls driving of the conveying screws 92 in the collected developer passage 220 illustrated in FIG. 4 . Further, the waste-toner conveyance controller 121 adjusts rotation of the conveying screw according to the setting input from the waste-toner conveyance setting unit 115, thereby conveying waste toner according to the setting of "conveyance speed" defined in the database in FIG. 10 .
  • the conveyance speed of waste toner in a downstream waste-toner channel can be made faster than the conveyance speed of waste toner in an upstream waste-toner channel (e.g., the first waste-toner channel 221).
  • the counter 122 measures or counts the time period during which the waste-toner conveyance controller 121 drives the conveying screws 92 in the collected developer passage 220 to transport waste toner.
  • a count value of the counter 122 reaches the threshold set in the database in FIG. 10 , it is deemed that the temporary reservoir 225 is filled to capacity with waste toner, and the counter 122 outputs a stop signal to the main controller 101. Then, the job manager 111 compulsively stops image output. Further, the counter 122 adjusts the threshold of the count value according to "threshold" included in the toner type data record input from the waste-toner conveyance setting unit 115.
  • the bottle detector 123 is disposed on a side of the waste-toner bottle 226 as illustrated in FIG. 4 . With the bottle detector 123, whether or not the waste-toner bottle 226 is connected to the temporary reservoir 225 is detected. When the waste-toner bottle 226 is not connected, the bottle detector 123 sends a count request to the counter 122. In response to the request from the bottle detector 123, the counter 122 counts the time during which the waste-toner conveyance controller 121 drives the conveying screws 92 in the collected developer passage 220 to transport waste toner.
  • the multiple elements illustrated in FIG. 9 operate in conjunction with each other and together serve as a controller to control waste toner conveyance, which includes conveying waste toner to the temporary reservoir 225 and discharging the waste toner from the temporary reservoir 225.
  • An aspect of the present embodiment is to change the setting in controlling waste toner conveyance according to the print job.
  • the job manager 111 receives a print job.
  • the job checker 112 refers to the content of the print job and checks whether or target toner is used in the print job.
  • the job checker 112 refers to the content of the print job and determines whether or not the area of the image developed with the target toner is greater than a predetermined threshold area.
  • the step S1103 is to determine whether to adjust the above-described conveyance condition corresponding to toner type.
  • the threshold area used at S1103 is set to a value equivalent to the predetermined amount of toner that can cause the inconvenience described with reference to FIGS. 7 and 8 .
  • the job checker 112 determines that the amount of toner used is equal to or greater than the predetermined amount when the image area developed with the target toner is greater than the threshold area. According to this determination, the job checker 112 determines to control the waste toner conveyance, in particular, change the conveyance condition, to avoid the inconvenience described with reference to FIGS. 5 to 8 .
  • the job checker 112 reports that control of the waste toner conveyance is necessary to the waste-toner conveyance setting unit 115.
  • the waste-toner conveyance setting unit 115 acquires setting data from the setting data memory 114, that is, the record of toner type enclosed by broken lines in FIG. 10 , and inputs the setting data to the engine controller 102. Then, the waste-toner setting, namely, the conveyance speed of waste toner, the threshold for the counter 122, and the like are changed.
  • the waste-toner conveyance setting unit 115 inputs the setting of "conveyance speed" to the waste-toner conveyance controller 121. Then, the setting according to which the waste-toner conveyance controller 121 controls the at least one of the conveying screws 92 in the collected developer passage 220 is changed. Additionally, the waste-toner conveyance setting unit 115 inputs the setting of "threshold" to the counter 122. Thus, the threshold for the counter 122, as the criterion to determine that the temporary reservoir 225 is filled to capacity, is changed.
  • the job manager 111 After changing the settings of waste toner conveyance is completed, at S1105, the job manager 111 starts the print job. Upon the start of the print job, at S1106, the bottle detector 123 detects whether the waste-toner bottle 226 is connected to the temporary reservoir 225. When the bottle detector 123 detects the waste-toner bottle 226 (Yes at S1106), the job manager 111 and the engine controller 102 continue the print job. When the print job is completed (Yes at S1107), the main controller 101 completes the control of waste toner conveyance.
  • the bottle detector 123 when the bottle detector 123 does not detect the waste-toner bottle 226 (No at S1106), the bottle detector 123 outputs a signal indicating that the waste-toner bottle 226 is not connected. In response to the signal, the waste-toner conveyance controller 121 stops driving of the discharge screw 92D to discharge waste toner from the temporary reservoir 225 to the waste-toner bottle 226. Additionally, at S1109, the counter 122 starts counting or measuring the driving time of the at least one of the conveying screws 92 in the collected developer passage 220 to recognize accumulation status of waste toner in the temporary reservoir 225 in the state in which the waste-toner bottle 226 is not connected thereto.
  • the waste-toner conveyance controller 121 monitors the counting. While the count value (i.e., the driving time) is smaller than the threshold (No at S110), the main controller 101 continues image formation until the print job is completed (Yes at S1112) and completes the control of waste toner conveyance. By contrast, when the count value reaches the threshold (Yes at S1110) while the print job continues (No at S1112), the counter 122 sends a stop signal to the job manager 111. Then, at S1111, the job manager 111 stops image output. With the above-described sequence of operations, the control of waste toner conveyance according to the present embodiment is completed.
  • the image forming apparatus 1 includes the temporary reservoir 225 to enable continuation of image formation even in the state in which the waste-toner bottle 226 (i.e., the waste-toner container) is removed from the apparatus.
  • the image forming apparatus 1 inhibits the above-described inconvenience, caused by conveyance of waste toner to the temporary reservoir 225 in a state in which the temporary reservoir 225 is filled to capacity, as follows.
  • the image forming apparatus 1 includes the counter 122 to count the time period during which images are output in the state in which the waste-toner bottle 226 is removed, and image output is compulsively stopped when the count value reaches the predetermined threshold.
  • the conveyance condition settings i.e., the speed at which waste toner is transported, the threshold of the counting, or the like
  • This control is advantageous in inhibiting the possibility that the temporary reservoir 225 being filled to capacity is not properly recognized based on a single threshold, which arises when multiple toner types different in flow properties are used. Thus, this control enables proper detection of the temporary reservoir 225 being filled to capacity.
  • the conveyance speed and the threshold of the counting are used as the settings in the control of waste toner conveyance in the case where the multiple developer types different in flow properties are used.
  • they are just examples and can be any item that enables detection of the temporary reservoir 225 being filled to capacity in accordance with flow properties of developer used.
  • the number of count values counted by the counter 122 per unit time may be changed in accordance with developer type.
  • the predetermined developer type is "Toner C" enclosed by broken liens in FIG. 10 , which is poorer in flow properties. Accordingly, when the conveying screws 92 are driven at the standard speed, the conveyance of Toner C thereby is slower than other developer types (the amount of transported per unit time is smaller). In the embodiment described above, when Toner C is used, the speed of the conveying screws 92 is increased, and further the threshold as the criterion to determine that the temporary reservoir 225 is filled to capacity is increased according to the difference in the flow properties (the amount of transported per unit or bulk density in particular) between the target toner and other toners.
  • “Toner D” and “Toner E” are better in flow properties, and transported faster (the amount of transported per unit time is greater) when the conveying screws 92 are driven at the standard speed.
  • the setting of the threshold is made smaller, according to the difference in the flow properties (the amount of transported per unit or bulk density in particular), to avoid operation of the apparatus in the state in which the temporary reservoir 225 is filled to capacity.
  • the speed of the conveying screw is reduced to elongate the period until the temporary reservoir 225 is filled to capacity according to the difference in the flow properties,
  • the usage amount of the target toner is estimated based on the area of the image to be formed with the target toner (at S1103).
  • the density of white toner is higher as the lightness of the recording medium is lower. Accordingly, it is possible that the usage amount of toner changes in the range of several times even if the area is similar.
  • the job checker 112 estimates the usage amount of the target toner based on the amount of toner adhering to unit area of the recording medium, that is, toner density on the recording medium. In this case, at S1103, the job checker 112 compares the density of the image formed with the target toner with the threshold and determines to control the waste toner conveyance according to toner type when the density is equal to or greater than the threshold. Alternatively, both of image area and the image density may be used for the determination.
  • the above-described control is premised on the state in which the waste-toner bottle 226 is removed from the apparatus.
  • the waste-toner bottle 226 is removed, for example, when the waste-toner bottle 226 is filled to capacity and replaced. Accordingly, in which the waste-toner bottle 226 is removed, the image forming apparatus 1 is not operated for a long time, and the waste-toner bottle 226 is to be connected to the temporary reservoir 225 soon.
  • the waste-toner conveyance controller 121 sets the speed at which waste toner is transported to the waste-toner bottle 226 from the temporary reservoir 225 to a higher setting than the standard setting.
  • the waste toner is promptly discharged from the temporary reservoir 225 to the waste-toner bottle 226, thereby avoiding the state of the temporary reservoir 225 being filled to capacity, and relating inconveniences.
  • the driving time of the conveying screw counted by the counter 122 is compared with the threshold as an example to recognize the process of accumulation of waste toner in the temporary reservoir 225 as images are repeatedly output.
  • the accumulation of waste toner in the temporary reservoir 225 may be recognized, for example, by counting the area of range to which respective color toners are transferred in the output image.
  • toner that is not transferred by the transfer device 215 onto the conveyor belt 205 but remains on the photoconductor drum 209 is removed by the cleaning device 213 and collected to the temporary reservoir 225.
  • the amount of toner that is not transferred by the transfer device 215 onto the conveyor belt 205 but remains on the photoconductor drum 209 is substantially constant.
  • the amount of waste toner transported to the temporary reservoir 225 can be estimated based on the amount of toner that adheres to the photoconductor drum 209, that is, the areas of respective color toner images to be transferred to the sheet as an output image. Then, the state of the temporary reservoir 225 being filled to capacity is recognizable similarly by setting a proper threshold for the areas of images to be transferred.
  • the main controller 101 is configured as illustrated in FIG. 9 , and the engine controller 102 includes an output area acquisition unit 124 (i.e., an output area counter) instead of the counter 122. Further, the main controller 101 has a capability relating to the counting of image area.
  • the job checker 112 has a capability to calculate the area of each of cyan, magenta, yellow, black, and special toner images in addition to the above-described capability to ascertain toner type.
  • the waste-toner conveyance setting unit 115 inputs the areas of respective color toner images thus calculated to the engine controller 102 together with the above-described setting data.
  • the job checker 112 calculates the respective color image areas referring to the respective color drawing data.
  • the pixel constituting the image is indicated as either chromatic or achromatic regarding each color. Accordingly, the job checker 112 acquires the image area by counting the number of chromatic pixels in each of the respective color drawing data.
  • weighting may be made according to density data so that the density is considered in calculating the image area to estimating the amount of waste toner.
  • the output area acquisition unit 124 acquires the respective color image areas and counts the image area.
  • the stop signal is transmitted similarly.
  • the amount in total of waste toner accumulating in the temporary reservoir 225 corresponds to the area of toner image formed on the photoconductor drum 209.
  • pulverization toner and polymerization toner differs in particle shape from each other as described above with reference to FIGS. 5 through 8 . Therefore, even when the amount of toner corresponds to an identical image area, the bulk occupied by the toner in the temporary reservoir 225 is different between pulverization toner particles, between which a greater amount of clearances are present and polymerization toner particles, between which a smaller amount of clearances are present.
  • the amount of toner contained in the temporary reservoir 225 changes depending on the transfer efficiency of the transfer device 215 transferring the toner image onto the conveyor belt 205. Compared with polymerization toner, pulverization toner is lower in transfer efficiency, and the amount of pulverization toner collected as waste toner is greater than polymerization toner. Accordingly, even when the image area is identical, in the case where pulverization toner is used, it is necessary to set the threshold to a lower setting so that the state of the temporary reservoir 225 being filled to capacity is recognized earlier.
  • the effects similar to those attained by the above-described embodiment are available by changing the threshold, the conveyance speed, or both when used of specific developer is recognized.
  • the "threshold" in FIG. 10 is reduced, that is, set to a smaller setting to bring forward the determination of the temporary reservoir 225 being filled to capacity.
  • the "threshold" in FIG. 10 is increased, that is, set to a larger setting to delay the determination of the temporary reservoir 225 being filled to capacity.
  • both of the driving time and the image area may be counted so that the determination of the temporary reservoir 225 being filled to capacity is made based on both of them.
  • This configuration can improve the accuracy of determination or reliably inhibit transport of waste toner to the temporary reservoir 225 exceeding the capacity of the temporary reservoir 225.
  • any one of the above-described and other example features of the present invention may be embodied in the form of an apparatus, method, system, computer program and computer program product.
  • the aforementioned methods may be embodied in the form of a system or device, including, but not limited to, any of the structure for performing the methodology illustrated in the drawings.
  • any of the aforementioned methods may be embodied in the form of a program.
  • the program may be stored on a computer readable media and is adapted to perform any one of the aforementioned methods when run on a computer device (a device including a processor).
  • a computer device a device including a processor
  • the storage medium or computer readable medium is adapted to store information and is adapted to interact with a data processing facility or computer device to perform the method of any of the above mentioned embodiments.

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Claims (14)

  1. Bilderzeugungsvorrichtung (1), in der mehrere unterschiedliche Entwickler verwendbar sind, wobei die Bilderzeugungsvorrichtung (1) Folgendes umfasst:
    eine Bilderzeugungseinheit (206), die konfiguriert ist, ein Bild auf einem Bildträger (209; 205) mit Entwickler zu erzeugen;
    eine Reinigungseinrichtung (213; 218), die konfiguriert ist, Entwickler von dem Bildträger (209; 205) zu sammeln;
    einen gesammelten Entwicklerdurchgang (220), durch den gesammelter Entwickler, der durch die Reinigungseinrichtung (213; 218) gesammelt wurde, transportiert wird;
    einen drehbaren Entwicklerförderer (92), der in dem gesammelten Entwicklerdurchgang (220) angeordnet ist und konfiguriert ist, den gesammelten Entwickler darin zu transportieren;
    einen vorübergehenden Entwicklerbehälter (225), der mit dem gesammelten Entwicklerdurchgang (220) verbunden ist und konfiguriert ist, den gesammelten Entwickler vorübergehend zu speichern;
    einen Abfallentwicklerbehälter (226), der mit dem vorübergehenden Entwicklerbehälter (225) abnehmbar verbunden ist; und
    eine Steuerung (100), die konfiguriert ist, Förderung des gesammelten Entwicklers von der Reinigungseinrichtung (213; 218) zu steuern,
    dadurch gekennzeichnet, dass:
    die Steuerung (100) ferner zu Folgendem konfiguriert ist:
    Bezugnehmen auf eine Entwicklertypdatenbank, in der jeder der mehreren unterschiedlichen Entwickler mit einer Förderbedingung korreliert ist, um den gesammelten Entwickler zu transportieren,
    Einstellen eines der mehreren unterschiedlichen Entwickler als einen Zielentwickler und
    Ändern der Förderbedingung gemäß der Entwicklertypdatenbank, wenn ein Inhalt eines Bildausgabeauftrags angibt, dass der Zielentwickler verwendet wird;
    die Steuerung ferner Folgendes umfasst:
    einen Auftragsprüfer (112), der konfiguriert ist, sich auf einen Inhalt des Bildausgabeauftrags zu beziehen und zu prüfen, ob der Zielentwickler in dem Bildausgabeauftrag verwendet wird.
  2. Bilderzeugungsvorrichtung (1) nach Anspruch 1, ferner umfassend:
    einen Detektor (123), der konfiguriert ist, zu detektieren, dass der Abfallentwicklerbehälter (226) mit dem vorübergehenden Entwicklerbehälter (225) verbunden ist; und
    einen Zähler (122), der konfiguriert ist, einen Zeitraum, während dessen Bildausgabe ausgeführt wird, in einem Zustand, in dem der Abfallentwicklerbehälter (226) gemäß einer Ausgabe von dem Detektor (123) nicht mit dem vorübergehenden Entwicklerbehälter (225) verbunden ist, zu zählen,
    wobei die Förderbedingung einen Schwellenwert eines Zählwerts des Zeitraums, der durch den Zähler (122) gezählt wurde, beinhaltet,
    die Steuerung (100) ferner konfiguriert ist, Bilderzeugung durch die Bilderzeugungseinheit (206) zu stoppen, wenn der Zählwert den Schwellenwert erreicht, und
    die Steuerung (100) ferner konfiguriert ist, den Schwellenwert zu ändern, wenn der Inhalt des Bildaufgabeauftrags angibt, dass der Zielentwickler verwendet wird.
  3. Bilderzeugungsvorrichtung (1) nach Anspruch 2, wobei die Entwicklertypdatenbank einen ersten Entwickler und einen zweiten Entwickler, der schlechtere Fließeigenschaften als der erste Entwickler hat, beinhaltet, wobei der zweite Entwickler als der Zielentwickler eingestellt ist, und
    die Steuerung (100) konfiguriert ist, den Schwellenwert auf einen erhöhten Wert zu ändern, wenn der zweite Entwickler verwendet wird.
  4. Bilderzeugungsvorrichtung (1) nach Anspruch 2, wobei die Entwicklertypdatenbank einen ersten Entwickler, der als der Zielentwickler eingestellt ist, und einen zweiten Entwickler, der schlechtere Fließeigenschaften als der erste Entwickler hat, beinhaltet und die Steuerung (100) konfiguriert ist, den Schwellenwert auf einen verringerten Wert zu ändern, wenn der erste Entwickler verwendet wird.
  5. Bilderzeugungsvorrichtung (1) nach Anspruch 1, ferner umfassend:
    einen Detektor (123), der konfiguriert ist, zu detektieren, dass der Abfallentwicklerbehälter (226) mit dem vorübergehenden Entwicklerbehälter (225) verbunden ist; und
    einen Zähler (122), der konfiguriert ist, einen Bereich einer Bildausgabe in einem Zustand, in dem der Abfallentwicklerbehälter (226) gemäß einer Ausgabe von dem Detektor (123) nicht mit dem vorübergehenden Entwicklerbehälter (225) verbunden ist, zu zählen,
    wobei die Förderbedingung einen Schwellenwert eines Zählwerts des Bereichs, der durch den Zähler (122) gezählt wurde, beinhaltet,
    die Steuerung (100) konfiguriert ist, Bilderzeugung durch die Bilderzeugungseinheit (206) zu stoppen, wenn der Zählwert des Bereichs, der durch den Zähler (122) gezählt wurde, den Schwellenwert erreicht, und
    die Steuerung (100) ferner konfiguriert ist, den Schwellenwert zu ändern, wenn der Inhalt des Bildaufgabeauftrags angibt, dass der Zielentwickler verwendet wird.
  6. Bilderzeugungsvorrichtung (1) nach Anspruch 5, wobei die Entwicklertypdatenbank einen ersten Entwickler und einen zweiten Entwickler, der eine größere Masse als der erste Entwickler hat, wenn er in dem vorübergehenden Entwicklerbehälter (225) gespeichert ist, beinhaltet, wobei der zweite Entwickler als der Zielentwickler eingestellt ist, und
    die Steuerung (100) konfiguriert ist, den Schwellenwert auf einen verringerten Wert zu ändern, wenn der zweite Entwickler verwendet wird.
  7. Bilderzeugungsvorrichtung (1) nach Anspruch 5, wobei die Entwicklertypdatenbank einen ersten Entwickler, der als der Zielentwickler eingestellt ist, und einen zweiten Entwickler, der eine größere Masse als der erste Entwickler hat, wenn er in dem vorübergehenden Entwicklerbehälter (225) gespeichert ist, beinhaltet und
    die Steuerung (100) konfiguriert ist, den Schwellenwert auf einen erhöhten Wert zu ändern, wenn der erste Entwickler verwendet wird.
  8. Bilderzeugungsvorrichtung (1) nach Anspruch 1 oder 2, wobei die Förderbedingung eine Fördergeschwindigkeit beinhaltet, mit der der drehbare Entwicklerförderer (92) den gesammelten Entwickler transportiert, und
    die Steuerung (100) konfiguriert ist, die Fördergeschwindigkeit zu ändern, wenn der Inhalt des Bildausgabeauftrags angibt, dass der Zielentwickler verwendet wird.
  9. Bilderzeugungsvorrichtung (1) nach Anspruch 8, wobei die Entwicklertypdatenbank einen ersten Entwickler und einen zweiten Entwickler, der schlechtere Fließeigenschaften als der erste Entwickler hat, beinhaltet, wobei der zweite Entwickler als der Zielentwickler eingestellt ist, und
    die Steuerung (100) konfiguriert ist, die Fördergeschwindigkeit auf eine erhöhte Geschwindigkeit zu ändern, wenn der zweite Entwickler verwendet wird.
  10. Bilderzeugungsvorrichtung (1) nach Anspruch 8, wobei die Entwicklertypdatenbank einen ersten Entwickler, der als der Zielentwickler eingestellt ist, und einen zweiten Entwickler, der schlechtere Fließeigenschaften als der erste Entwickler hat, beinhaltet und
    die Steuerung (100) konfiguriert ist, die Fördergeschwindigkeit auf eine verringerte Geschwindigkeit zu ändern, wenn der erste Entwickler verwendet wird.
  11. Bilderzeugungsvorrichtung (1) nach einem der Ansprüche 1 bis 10, wobei die Steuerung (100) einen Speicher (114) umfasst, der konfiguriert ist, die Entwicklertypdatenbank zu speichern; und
    die Bilderzeugungseinheit (206) eine Entwicklungseinrichtung (212) umfasst, die konfiguriert ist, den Entwickler zu enthalten,
    wobei die Entwicklertypdatenbank eine Einstellung der Förderbedingung beinhaltet, die mit dem Entwickler, der in der Entwicklungseinrichtung (212) enthalten ist, korreliert ist, und
    wenn der Inhalt des Bildausgabeauftrags angibt, dass der Zielentwickler verwendet wird, die Steuerung (100) konfiguriert ist, die Förderbedingung gemäß der Einstellung in der Entwicklertypdatenbank, die in dem Speicher gespeichert ist, zu ändern.
  12. Bilderzeugungsvorrichtung (1) nach einem der Ansprüche 1 bis 11, wobei die Steuerung (100) konfiguriert ist, die Förderbedingung zu ändern, wenn eine Verbrauchsmenge des Zielentwicklers gleich oder größer als eine vorbestimmte Menge ist.
  13. Bilderzeugungsvorrichtung (1) nach Anspruch 12, wobei die Steuerung (100) konfiguriert ist, zu bestimmen, dass die Verbrauchsmenge des Zielentwicklers gleich oder größer als die vorbestimmte Menge ist, wenn der Inhalt des Bildausgabeauftrags angibt, dass ein Bereich eines Bilds, der mit dem Zielentwickler entwickelt wird, gleich oder größer als ein vorbestimmter Bereich ist.
  14. Bilderzeugungsvorrichtung (1) nach Anspruch 12, wobei die Steuerung (100) konfiguriert ist, zu bestimmen, dass die Verbrauchsmenge des Zielentwicklers gleich oder größer als die vorbestimmte Menge ist, wenn der Inhalt des Bildausgabeauftrags angibt, dass ein Bild, das mit dem Zielentwickler entwickelt wird, eine Bilddichte, die gleich oder größer als eine Schwellenwertdichte ist, hat.
EP15173498.5A 2014-06-30 2015-06-24 Bilderzeugungsvorrichtung Active EP2963502B1 (de)

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JP2014134416 2014-06-30
JP2014199207 2014-09-29
JP2015010418A JP2016066040A (ja) 2014-06-30 2015-01-22 画像形成装置

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JP2004198891A (ja) * 2002-12-20 2004-07-15 Fuji Xerox Co Ltd 廃棄粉体搬送装置および画像形成装置
JP2009204679A (ja) * 2008-02-26 2009-09-10 Canon Inc 画像形成装置
JP2009223062A (ja) * 2008-03-17 2009-10-01 Ricoh Co Ltd カラー画像形成装置
JP5743183B2 (ja) 2010-03-17 2015-07-01 株式会社リコー 画像形成装置
JP2013080158A (ja) * 2011-10-05 2013-05-02 Konica Minolta Business Technologies Inc 廃トナー回収装置及び画像形成装置
JP2014095819A (ja) * 2012-11-09 2014-05-22 Fuji Xerox Co Ltd 画像形成装置

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