EP0507528A2 - Arbeitseinheit und damit ausgestattetes Bilderzeugungssystem - Google Patents

Arbeitseinheit und damit ausgestattetes Bilderzeugungssystem Download PDF

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Publication number
EP0507528A2
EP0507528A2 EP92302768A EP92302768A EP0507528A2 EP 0507528 A2 EP0507528 A2 EP 0507528A2 EP 92302768 A EP92302768 A EP 92302768A EP 92302768 A EP92302768 A EP 92302768A EP 0507528 A2 EP0507528 A2 EP 0507528A2
Authority
EP
European Patent Office
Prior art keywords
process cartridge
image bearing
bearing member
image
protection
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.)
Granted
Application number
EP92302768A
Other languages
English (en)
French (fr)
Other versions
EP0507528A3 (en
EP0507528B1 (de
Inventor
Masahiko C/O Canon Kabushiki Kaisha Yashiro
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.)
Canon Inc
Original Assignee
Canon Inc
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
Application filed by Canon Inc filed Critical Canon Inc
Publication of EP0507528A2 publication Critical patent/EP0507528A2/de
Publication of EP0507528A3 publication Critical patent/EP0507528A3/en
Application granted granted Critical
Publication of EP0507528B1 publication Critical patent/EP0507528B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/18—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge, whereby the process cartridge comprises at least two image processing means in a single unit
    • G03G21/1803—Arrangements or disposition of the complete process cartridge or parts thereof
    • G03G21/1828—Prevention of damage or soiling, e.g. mechanical abrasion
    • G03G21/1832—Shielding members, shutter, e.g. light, heat shielding, prevention of toner scattering
    • 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
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/1642—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements for connecting the different parts of the apparatus
    • G03G21/1647—Mechanical connection means
    • 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
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/1661—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements means for handling parts of the apparatus in the apparatus
    • G03G21/1671—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements means for handling parts of the apparatus in the apparatus for the photosensitive element
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1606—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for the photosensitive element
    • G03G2221/1609—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for the photosensitive element protective arrangements for preventing damage
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1651—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for connecting the different parts
    • G03G2221/1654—Locks and means for positioning or alignment
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1651—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for connecting the different parts
    • G03G2221/1657—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for connecting the different parts transmitting mechanical drive power
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/18—Cartridge systems
    • G03G2221/183—Process cartridge

Definitions

  • the present invention relates to a process cartridge and an image forming system within which such process cartridge can be mounted.
  • the image forming system may be an electrophotographic copying machine, a laser beam printer (LBP), a facsimile system, a word processor or the like.
  • an image forming system having a removable process cartridge including a desired process means necessary for forming an image, thereby permitting the easy replacement of the cartridge due to the expiration of the service life of the cartridge or the like has been proposed (refer to U.S. Patent No. 3,985,436).
  • a plurality of process cartridges having developer of different colors therein can be used to form a color image, and, thus, have high frequency in exchange, and, in some cases, the process cartridge alone is disposed outside the image forming system.
  • the process cartridge is provided with a cover member for protecting the photosensitive member and shielding the interior of the cartridge from ambient light.
  • the inventors invented the particularly effective techniques in this technical field and disclosed them in U.S. Patent Nos. 4,470,689 and 4,462,677.
  • the present invention relates to the inprovement in the above invented techniques.
  • Fig. 1 shows a process cartridge 3.
  • a photosensitive drum 4 disposed in the process cartridge 3 is easily overcome by shock and frictional wear.
  • a drum shutter 20 is provided at a transfer opening 3a of the cartridge 3 and the photosensitive drum 4 is protected by the drum shutter 20.
  • the drum shutter 20 is shifted from a closed position to an open position (shown by the broken line 20a), thus permitting the transferring of an image formed on the photosensitive drum.
  • the closed position of the drum shutter is limited or regulated by abutting a projection 20b of the drum shutter against an end 7a of a cleaner 7.
  • the reference numeral 21 denotes a shutter arm.
  • a width of the drum shutter 20 is long (for example, in a process cartridge 3 capable of forming an image on a sheet of A4 size, the width L is about 270 mm, and, in a process cartridge 3 capable of forming an image on a sheet of A3 size, the width L is about 350 mm).
  • the drum shutter 20 is generally formed from the engineering plastics.
  • a protection sheet as a drum guard 23 for protecting the drum is adhered to an inner surface of the drum shutter 20 to protect the drum.
  • a protection sheet as a drum guard 23 for protecting the drum is adhered to an inner surface of the drum shutter 20 to protect the drum.
  • An object of the present invention is to provide a process cartridge and an image forming system within which such process cartridge can be mounted which can maintain the image quality.
  • Another object of the present invention is to provide a process cartridge and an image forming system which can prevent an image bearing member from being damaged by a protection member for protecting the image bearing member.
  • a further object of the present invention is to provide a process cartridge and an image forming system wherein, even if a cover of a drum shutter is deformed by an operator's hand, an image bearing member such as a photosensitive drum is not contacted with the cover, thus protecting the image bearing member.
  • the other object of the present invention is to provide a process cartridge and an image forming system which comprises a cover shiftable between a first position where it covers an exposed surface of an image bearing member and a second position where it is retarded from the first position, wherein, when the cover is positioned in the first position, the cover is abutted against a non-imaging area of the image bearing member (including a flange fixed to the image bearing member), thus regulating the position of the cover.
  • the present invention is applicable to an image forming system such as an electrophotographic system, an electrostatic recording system and the like which utilizes electrophotographic technique and which can be embodied as an electrophotographic copying machine, a laser beam printer and the like.
  • a laser beam printer 1 includes a process cartridge 3 removably mounted within a frame 2 of the printer.
  • the process cartridge 3 has a frame 3a within which there are arranged a photosensitive drum 4 acting as an image bearing member, and a conventional process means comprising a charger 5, a developing device 6 (including a toner containing portion 6a and a developing sleeve 6b) and a cleaner 7 (including a cleaning blade 7a and a waste toner reservoir 7b) which are disposed around the photosensitive drum.
  • the reference numerals 33a and 33b denote cartridge mounting means on which the process cartridge 3 can be mounted from a direction shown by the arrow A.
  • a scanner unit 8 for illuminating a laser beam 8a on a photosensitive member 4a of the drum and scanning the drum, and a reflection mirror 9.
  • the scanner unit 8 receives image information from an information processing system (not shown) such as a computer or a word processor and emits the laser beam 8a in correspondence to the information.
  • a latent image corresponding the image information is formed on the drum.
  • the latent image is developed by the developing device 6 to form a toner image.
  • a sheet supply cassette 10 containing sheets (recording media) S therein.
  • a sheet supply roller 11 is arranged above the sheet supply cassette 10. The sheet S contained in the sheet supply cassette 10 is supplied one by one by means of the sheet supply roller 11 to reach a pair of regist rollers 12 which in turn send the sheet between the photosensitive drum 4 and a transfer charger 13 in registration with the toner image formed on the photosensitive drum 4.
  • the toner image on the photosensitive drum 4 is transferred onto the sheet S at a transfer station.
  • the sheet to which the image was transferred is sent, by a convey belt unit 14, to a fixing device 15 (including a heat roller 15a and a pressure roller 15b), where the toner image is permanently fixed to the sheet. Thereafter, the sheet is ejected out of the frame 2.
  • the frame 3a of the cartridge has an exposure opening 3b and a transfer opening 3c and supports the photosensitive drum 4, developing device 6 and cleaner 7.
  • the laser beam printer 1 there are two methods for ejecting the sheet S after the image formation, one of which is a method for ejecting the sheet S with face-up, i.e., with facing an imaged surface upside.
  • the sheet S is sent by face-up ejector rollers 16 toward a face-up ejection tray 17.
  • the other method for ejecting the sheet is a method for ejecting the sheet S with face-down, i.e., with facing the imaged surface downside at the page order.
  • the sheet S fed from the face-up ejector rollers 16 is guided upwardly via a switching means 31 such as a flapper and a sheet guide member 32 to invert the sheet, and then is ejected onto a face-down ejection tray 19 via face-down ejector rollers 18.
  • the switching means 31 may be automatically switched by the activation of a plunger (not shown) when an operator turns a switch button (not shown) ON or may be manually switched by manipulating a manual lever (not shown).
  • the maintenance of the laser beam printer 1 according to the illustrated embodiment is effected from a direction shown by the arrow A after an upper portion 2a of the frame 2 is rotated upwardly with respect to a lower portion 2b around a pivot P to expose the interior of the printer.
  • the process cartridge 3 is mounted on the upper portion 2a.
  • Figs. 5A and 5B show the process cartridge according to the first embodiment of the present invention, where Fig. 1 is a perspective view of the process cartridge and Fig. 5B is a side view of the cartridge.
  • two ribs 20c are formed on an inner surface 20e of a drum shutter 20 as a cover (surface facing a photosensitive drum 4 when the shutter is in a closed position) near both ends thereof along a width thereof (i.e., along an opening/closing direction of the shutter), so that the ribs are abutted against the photosensitive drum (image bearing member) 4 when the shutter is closed.
  • the position of the ribs 20c is so selected that they are abutted against non-imaging areas or non-photosensitive surfaces (cylindrical peripheral surfaces) 4b disposed on both ends of the drum, thus preventing the ribs from contacting with a photosensitive surface (imaging area) 4a of the drum.
  • the ribs 20c are protruded from the drum shutter 20 toward the drum at areas out of the photosensitive surface or imaging area 4a.
  • the ribs 20c have semi-cylindrical surfaces 20d adapted to be smoothly abutted against the photosensitive drum 4.
  • the areas of the photosensitive drum 4 against which the ribs 20c are abutted are not limited to the non-photosensitive surfaces, but may be photosensitive surfaces on which an image is formed.
  • the ribs 20c are protruded from the inner surface 20e of the drum shutter 20 by about 3 - 7 mm, preferably about 4 - 6 mm and most preferably about 5.5 mm.
  • the height d of each rib 20c may be selected so that the height d becomes greater than the flexed amount ⁇ (d > ⁇ ).
  • the ribs 20c on both ends of the drum shutter 20 are abutted against the non- photosensitive surfaces 4b, since such surfaces are out of the image forming area, if such surfaces are damaged, the image to be formed is not influenced upon such damage. Furthermore, the ribs 20c may be abutted against the portions of the photosensitive surface 4a so long as such portions are non-imaging areas. Also in this case, the image to be formed is not influenced badly.
  • any protection sheet is not required, thus reducing the cost of the cartridge. Furthermore, since the drum shutter are directly positioned with respect to the photosensitive drum 4, the positioning accuracy of the drum shutter is improved, thus enhancing the protecting ability of the drum shutter 20 regarding the photosensitive drum 4.
  • FIGs. 6A and 6B show a process cartridge according to a second embodiment of the present invention, where Fig. 6A is a perspective view of the process cartridge and Fig. 6B is a side view of the cartridge.
  • flanges 24a, 25a having drum gear portions 24, 25 are adhered to or pressfitted into an inner cylindrical surface of the sylinder 4b and each has an outer diameter sufficiently larger than on outer diameter of the photosensitive drum 4 and tip circles of the drum gear portions 24, 25. Outer surfaces of the flanges 24a, 25a are adapted to be abutted against an inner surface 20e of a drum shutter 20.
  • the gear portion 24 serves to receive a driving force for driving the photosensitive drum 4 from the printer 1 and the gear portion 25 serves to drive the developing sleeve 6b and the like.
  • such flanges 24a, 25a serves to prevent the toner adhered to the photosensitive drum 4 from scattering on and adhering to surfaces of teeth or grooves of the drum gear portions 24, 25, thus reducing the discrepancy in the gearing. Further, when any lublicant is applied to the gearing portions to obtain the smooth gearing, the flanges 24a, 25a can prevent the lublicant from flowing from the gear portions onto the photosensitive drum 4.
  • the drum shutter 20 covers the exposed area (transfer area) of the photosensitive drum 4; whereas, when the process cartridge 3 is inserted into the printer, the drum shutter 20 is retarded from this position.
  • the drum shutter 20 is integrally formed from high impact plastic resin such as polystyrol, and a thickness thereof is about 0.5 - 3 mm, preferably about 1 - 2 mm and most preferably about 1.5 mm.
  • Figs. 7A and 7B show a condition that the process cartridge 3 is started to be inserted into the frame 2 of the printer, where Fig. 7A is a perspective view of the process cartridge and Fig. 7B is a side view of the cartridge.
  • Figs. 8A and 8B show a condition that the process cartridge 3 is completely inserted into the frame 2 of the printer, where Fig. 8A is a perspective view of the process cartridge and Fig. 8B is a side view of the cartridge.
  • the reference numeral 3b denotes an exposure opening through which the light corresponding to the image information is illuminated onto the photosensitive member 4a.
  • the frame 3a of the process cartridge 3 is inserted from the position shown in Figs. 7A and 7B toward a direction shown by the arrow V.
  • a projection 40c of a movable link 40 for releasing the drum shutter (protection member) 20 is abutted against a fixed member 41 formed on the frame 2 of the printer.
  • the link 40 is rotated around a pivot 40a, with the result that the drum shutter 20 is opened while being guided by links 42a, 42b disposed on both sides of the shutter.
  • the process cartridge 3 is mounted in a predetermined mounting position, the shutter 20 is maintained in the open condition in the vicinity of the frame 3a near the cleaner 7.
  • the cartridge 3 when the cartridge 3 is dismounted from the frame 2 of the printer, the cartridge is drawn in a direction opposite to the direction V. Meanwhile, when the movable link 40 is disengaged from the fixed member 41, the drum shutter 20 is returned to the closed position covering the transfer opening 3b of the frame 3a, by a biasing force of a spring 43 disposed on the pivot 40a. In this position, the shutter 20 is maintained in the closed position by abutting a portion 40d of the movable link 40 against the frame 3a by the biasing force of the spring 43.
  • the movable link 40 is rotatably mounted on the frame 3a via the pivot 40a, and the other end of the movable link is rotatably connected to a lateral edge 20f of the shutter 20 via a pin 40b.
  • the links 42a, 42b are rotatably mounted at their one end 42c on the frame 3a, and are also rotatably connected at their other end 42d to the lateral edge 20f of the shutter 20.
  • Fig. 9 As a side view. Incidentally, in Fig. 9, several positions of the drum shutter 20 transited from the closed position to the open position are also illustrated.
  • the reference numeral 50 denotes a guide disposed outside the frame 3a for guiding the cartridge 3 in the mounting direction during the insertion of the cartridge.
  • the movable link 40 has a "convex" shape so that it encircles a right half of the photosensitive drum 4 and is pivotally mounted on the frame 3a via the pivot 40a, and the end of the link is rotatably connected to a central portion of the lateral edge 20f of the shutter 20 via the pin 40b.
  • the link 42a has an end portion bent at a right angle, and a distal end of the bent portion is rotatably connected to the lateral edge 20f of the shutter 20 at a corner 20g of the end thereof to be opened.
  • the end 42c of this link is pivotally mounted on the frame 3a.
  • the attachment end 42c of the link 42a is disposed between the photosensitive drum 4 and the pin 40a for the movable link 40c in the vertical direction. Further, in the horizontal direction, the end 42c is disposed on the frame 3a outside the peripheral surface of the photosensitive drum 4 and the pivot 40a for the movable link 40.
  • the drum shutter 20 is opened along the proximity of the frame 3a near the cleaner 7.
  • the opening/closing movement of the shutter 20 is effected along the proximity of the frame 3a, it is possible to further reduce the cartridge mounting space in the frame 2 of the printer in comparison with the conventional case.
  • Figs. 10A and 10B are perspective view of the above-mentioned shutter 20 (Figs. 7, 8, 9).
  • Fig. 10B is a perspective view of the shutter to which the links are attached.
  • vertical projections 20h are formed on lateral edges of a cover portion 20a of the shtuter 20.
  • Each projection 20h has a semi-cylindrical surface 201 which is adapted to be abutted against the drum 4, and a flat surface 20j.
  • the flat surfaces 20j of the projections 20h are firstly abutted against the peripheral surface of the drum 4.
  • the drum shutter 20 is molded from polystyrol resin similar to the frame 3a.
  • the drum shutter 20, when closed, is positioned with respect to the peripheral surface of the drum 4 with high accuracy, and, thus, when the operator grasps the cartridge 3, even if the shutter 20 is flexed (normally, the shutter is subjected to the load of about 2 Kg), it is possible to prevent the surface of the photosensitive member 4a from being damaged by the flexed shutter 20. Further, when the shutter 20 is closed, since the projections 20h mate with the peripheral surface of the drum, the protection ability for the photosensitive member 4a can be further improved.
  • the concrete dimension of the shutter will be described hereinbelow.
  • the following example is a case where the shutter 20 is used with a process cartridge capable of recording an image on a sheet having A4 size:
  • the process cartridges of the aforementioned embodiments had the charger, developing device and cleaner, as well as the photosensitive drum as the image bearing member
  • the process cartridge according to this embodiment may have at least image bearing member, and preferably has at least one of a charger, developing device and cleaner. That is to say, the above-mentioned process cartridge incorporates therein an image bearing member (for example, electrophotographic photosensitive member and the like), and at least one of a charger means, developing means and cleaning means (as action means) as a unit which can be removably mounted within a image forming system.
  • the process cartridge incorporates therein a charger means, developing means or cleaning means, and an electrophotographic photosensitive member as a unit which can be removably mounted within an image forming system (for example, a copying machine, laser beam printer or the like); or incorporates therein at least one of a charger means, developing means and cleaning means, and an electrophotographic photosensitive member as a unit which can be removably mounted within an image forming system (for example, a copying machine, laser beam printer or the like); or incorporates therein at least a developing means and an electrophotographic photosensitive member as a unit which can be removably mounted within an image forming system (for example, a copying machine, laser beam printer or the like).
  • the cover portion of the drum shutter for protecting the image bearing member such as the photosensitive drum is abutted against the non-imaging area of the photosensitive drum or the flanges formed on the photosensitive drum to position the former, even if the drum shutter is subjected to the excessive load, the image bearing surface of the photosensitive drum can be protected effectively.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Electrophotography Configuration And Component (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
EP92302768A 1991-04-01 1992-03-30 Arbeitseinheit und damit ausgestattetes Bilderzeugungssystem Expired - Lifetime EP0507528B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP6848491 1991-04-01
JP68484/91 1991-04-01
JP06230592A JP3200139B2 (ja) 1991-04-01 1992-03-18 プロセスカートリッジ及び前記プロセスカートリッジを装着可能な画像形成装置
JP62305/92 1992-03-18

Publications (3)

Publication Number Publication Date
EP0507528A2 true EP0507528A2 (de) 1992-10-07
EP0507528A3 EP0507528A3 (en) 1993-03-17
EP0507528B1 EP0507528B1 (de) 1996-09-11

Family

ID=26403377

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92302768A Expired - Lifetime EP0507528B1 (de) 1991-04-01 1992-03-30 Arbeitseinheit und damit ausgestattetes Bilderzeugungssystem

Country Status (4)

Country Link
EP (1) EP0507528B1 (de)
JP (1) JP3200139B2 (de)
DE (1) DE69213525T2 (de)
HK (1) HK121297A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0736820A1 (de) * 1995-04-03 1996-10-09 Matsushita Electric Industrial Co., Ltd. Bilderzeugungsgerät
EP0764893B1 (de) * 1991-12-20 1999-07-28 Canon Kabushiki Kaisha Arbeitseinheit und Bilderzeugungsgerät
CN115917440A (zh) * 2020-07-06 2023-04-04 惠普发展公司， 有限责任合伙企业 具有前盖的调色剂盒

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1898274B1 (de) 2002-09-24 2011-04-20 Ricoh Company, Ltd. Bilderzeugungsvorrichtung mit einem Bildträgerelement und einem Schutzverschluss
JP2004170904A (ja) 2002-11-08 2004-06-17 Ricoh Co Ltd 像担持体ユニット及び画像形成装置
US7039340B1 (en) * 2002-12-13 2006-05-02 Tonerhead, Inc. Universal drum cover for xerographic device cartridges
JP2006078840A (ja) * 2004-09-10 2006-03-23 Fuji Xerox Co Ltd ウォームギアユニットおよび画像形成装置
JP5091543B2 (ja) * 2006-05-29 2012-12-05 京セラドキュメントソリューションズ株式会社 着脱ユニット及び画像形成装置
JP5754578B2 (ja) * 2010-03-08 2015-07-29 富士ゼロックス株式会社 画像形成装置の感光体ユニット

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3220538C2 (de) * 1981-06-02 1987-05-07 Canon K.K., Tokio/Tokyo Prozeßeinheit für ein elektrografisches Bilderzeugungsgerät
EP0351894B1 (de) * 1986-05-28 1993-09-01 Mita Industrial Co., Ltd. Bildaufzeichnungsmaschine
GB8719545D0 (en) * 1987-08-19 1987-09-23 Xerox Corp Process unit
JPH02251869A (ja) * 1989-03-24 1990-10-09 Toshiba Corp 電子写真記録装置
JP3126340U (ja) 2006-08-10 2006-10-19 有限会社ヒロモト 鮮度保持容器

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0764893B1 (de) * 1991-12-20 1999-07-28 Canon Kabushiki Kaisha Arbeitseinheit und Bilderzeugungsgerät
EP0736820A1 (de) * 1995-04-03 1996-10-09 Matsushita Electric Industrial Co., Ltd. Bilderzeugungsgerät
US5787326A (en) * 1995-04-03 1998-07-28 Matsushita Electric Industrial Co., Ltd. Image forming apparatus having a cover for protecting a transfer region of an intermediate transfer member when a door is opened
CN115917440A (zh) * 2020-07-06 2023-04-04 惠普发展公司， 有限责任合伙企业 具有前盖的调色剂盒

Also Published As

Publication number Publication date
DE69213525D1 (de) 1996-10-17
DE69213525T2 (de) 1997-02-06
HK121297A (en) 1997-09-12
EP0507528A3 (en) 1993-03-17
JPH0580600A (ja) 1993-04-02
EP0507528B1 (de) 1996-09-11
JP3200139B2 (ja) 2001-08-20

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