US3660863A - Cleaning apparatus - Google Patents

Cleaning apparatus Download PDF

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Publication number
US3660863A
US3660863A US838984A US3660863DA US3660863A US 3660863 A US3660863 A US 3660863A US 838984 A US838984 A US 838984A US 3660863D A US3660863D A US 3660863DA US 3660863 A US3660863 A US 3660863A
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United States
Prior art keywords
blade
cutting edge
drum
combination
toner
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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.)
Expired - Lifetime
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US838984A
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English (en)
Inventor
Dennis P Gerbasi
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.)
Xerox Corp
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Xerox Corp
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Publication date
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    • 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
    • G03G21/0005—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium
    • G03G21/0011—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium using a blade; Details of cleaning blades, e.g. blade shape, layer forming
    • G03G21/0029—Details relating to the blade support

Definitions

  • An elastomeric blade for removing a dry particulate material from a surface to which the particulate material is electrostatically bonded.
  • An edge of the blade is supported in pressure contact against the surface in a cutting tool fashion and relative motion between the blade and the surface produced wherein the edge of the blade moves between the particulate material and the surface to cut or chisel'the material from the surface.
  • PATENTEBMAY 91912 sum 1 BF 4 INVENTOR. DENNIS P. GERBASI ATTORNEY PATENTEDHAY 9 1972 WE] 2 OF 4 PAIENIEMM 9 I972 SHEET 3 [IF 4 I II 'IIIIIIIIIIIIIIIIIIIIIIIIIIIII NM Wm PATENTEDMAY, 91972 sum u [If 4 can be readily process.
  • this invention relates to apparatus for use in automatic xerographic reproducing apparatus for removing a residual toner material from an image retaining member after a developed image is transferred from the member to a final support material.
  • a xerographic plate which is generally formed of a photoconductive surface placed upon a conductive backing, is charged uniformly and the surface of the plate exposed to a light image ofan original to' be reproduced.
  • the photoconductive coating is'caused to become conductive under the influence of the light image so as to selectively dissipate the electrostatic charge found thereon thus producing an electrostatic latent image.
  • the latent image is made visible by developing the image with any one of a variety of finely divided pigmented resins which have been specifically developed for this purpose.
  • the pigmented resin material, or toner 'is electrostatically attracted to, the latent image on the photoconductive surface in proportion to the amount of charge found thereon. Areas of small' charge concentration become areas of low toner density while areasof greater charge concentration become proportionally more dense.
  • the fully developed image is generally transferred from the .plate surface to a final support material, as for example, paper, and the image affixed thereto to form a permanent record of the original.
  • the blade moves between the toner material and the surface forcing the residual toner to be separated from the surface and directed behind the blade.
  • FIG. 1 illustrates schematically'an automatic xerographic reproducing apparatus employing the cleaning device of the present'invention
  • FIG. 2 is-a side elevation in partial section-showing thedrum cleaning station and associated elements of the toner reclaimingsystemshow'nirrFIG. l; I
  • FIG. 3 is a partial top view of the cleaning apparatus and toner reclaiming system shown in FIG. 2 constructed in accordance with the present invention
  • FIG. 4 is a partial sectional view showing the toner reclaiming bead chain position in relation to the toner'dispensing'apparatus of the automatic xerographic machine shownin FIG.
  • FIG. 5 is" an enlarged partial side elevation showing the cleaning blade of the present invention supported in pressure ductivelayer of a light receiving surface on a conductive backing andformed inthe shapeof a drum, generally designated 10, which isjjournaled in the-frame of the machine by means of shaft" 11.
  • the xerographic plate is rotated in the direction indicated in FIG. 1 to cause the drum surface to pass sequentially through a pluralityof xerographic processing stations.
  • a charging station A in which a uniform electrostatic charge is deposited. on the photoconductive layer of the xero-
  • wiper blade cleaning in which a wiper blade of rubber-like material is dragged or wiped across the plate surface to effect separation of the residual toner from theplate.
  • wiper blade cleaning it has been found that the separated toner rapidly builds up or collects between the wiper blade and plate surface and is, therefore, extremely difficult to remove from the'vicinity of the plate.
  • Elaborate electrostatic and/or pneumatic means are generally utiliied to efiect toner removal.
  • a further object of this invention is to improve apparatus for simply and efficiently removing dry powder from a support surface.
  • a development station C at which'axerographic developing material having tor'rer particles possessing an electrostatic charge opposite to the charge found on the drum surface in the latent image areas are cascaded over the moving drum sur# face whereby the toner particles adhere to the electrostatic latent image to make visible the image in the configuration of the original document to be reproduced;
  • a transfer station D in which the xerographic powder image is electrostatically transferred from the drum surface to 'a final 7 support material;
  • drum cleaning and toner collecting station E wherein the drum surface is first treated with corona and then treated with a doctor blade to remove residual toner particles remaining thereon after image transfer and wherein the removed toner is collected from reuse in the xerographicprocess and in which the drum surface is exposed to an incandescent panel to effect substantially complete discharge of any residual electrostatic charge remaining thereon.
  • the charging station is preferably located at the bottom of y the drum in the position indicated by reference character A in "tained by means of an elastomeric cleaning blade, means to FIG. 1.
  • the charging arrangement consists of a corona charging device. 13 which includes a corona'discharge array of one or more corona discharge electrodes that extend transversely across the drum surface and are energized from a high poten- Q tial source;
  • the corona discharge electrode is substantially enclosed within a shielding member and is adapted to generate a charge confined within this specific area.
  • the optical scanning and projecting assembly comprises a stationary transparent copy board 14 adapted to support the original to be copied: an illuminating means LMP-l to illuminate uniformly the original supported on the copy board; a folded optical system including an object mirror 16 a movable lens system 17, and an image mirror 18 arranged in light projecting relationship with the moving drum surface to project successive, illuminated incremental areas on the original document onto the drum surface to form a flowing light image thereon.
  • the lens element is positioned beneath the copy board and is arranged to move through a path of travel transverse to the plane of the copy board whereby the subject image of the original is scanned in timed relation to the movement of the light receiving surface on the xerographic drum.
  • a fade out panel Positioned adjacent to the exposure station is a fade out panel arranged to discharge or expose the drum surface in the areas between copies to a level below that required for xerographic development so that these charged but non-imaged areas will not be developed as the drum moves through the subsequent developing station.
  • a developing station C in which is positioned developing apparatus 20 including a housing 28 having'a lower sump portion therein capable of supporting a quantity of two component developer material.
  • a bucket type conveyor 27, having any suitable drive means, is employed to carry the developer material from the lower sum area to the upper part of the developer housing where it is deposited in hopper 29.
  • the developer material moves downwardly into contact with the upwardly moving photoconductive drum surface. Toner particles are deposited in the image areas on the drum surface in relation to the charge pattern found thereon to form a developed xerographic image.
  • the unused developer material passes from the development zone back into the lower portion of the developer housing.
  • Fresh xerographic toner material is supplied to the developer mix in proportion to the amount of toner deposited on the drum surface by means of dispensing apparatus positioned in the lower portion of toner dispensing bottle 21, as well as by means of the toner reclaiming apparatus of the present invention which will be explained in greater detail below.
  • the image transfer station D Positioned next and adjacent to the developing station is the image transfer station D. Individual sheets of final support material are fed seriatim into sheet registering and forwarding apparatus 22 from either upperfeed tray 35 or lower feed tray 34, The properly registered sheets are then forwarded into moving contact with the moving drum surface and the developed image electrostatically transferred from the drum to the final support material by means of transfer corotron 24. In operation, the electrostatic field created by the corona discharge device electrostatically tacks the transfer material to the drum surface whereby the transfer material moves synchronously with the drum while in contact therewith.
  • a mechanical stripper finger 25 is pivotally mounted in close proximity to the drum surface immediately adjacent to the transfer corotron.
  • the finger is arranged to move into contact with the drum surface prior to the arrival of the leading edgeof the support material.
  • the arcuate shaped stripper finger moves between the drum surface and the leading edge of the final support material to mechanically break the electrostatic bond holding the material to the drum. surface. Because of the positioning and the shape of the finger, the leading edge portion of the sheet of final support material is directed upwardly into contact with stationary vacuum transport 26.
  • the trailing edge of the support material which at this time is still electrostatically tacked to the drum surface, continues to drive the support material forward so that it moves along the bottom surface of the vacuum transport towards fuser assembly 30.
  • the image bearing support material moving along the stationary vacuum transport moves into the nip between upper fuser roll 31 and lower fuser roll 32 of fuser assembly 30.
  • the two rolls coact to deliver pressure driving force to the sheet of support material positioned therebetween.
  • a radiant heat source of heat energy 33 extends transverse to the lower roll surface and transfers heat energy to the roll.
  • the roll is specifically coated so that the heat energy transferred thereto is stored on the outer surface of the roll. As the roll rotates in the direction indicated,'the heat energy stored there is brought into rubbing contact with the image bearing support material passing through the nip between the two rolls where image fixing is accomplished by delivering a combination of heat and pressure energy to the image bearing support material.
  • the fixed copy After leaving the fuser assembly, the fixed copy is transported through a circular paper path into a movable guide and drive roll assembly 36.
  • the movable guides can be prepositioned to either feed the paper delivered from the fuser into upper feed tray 35 or into discharge catch tray 37.
  • the apparatus can be programmed by means of the machine control logic system to precondition the paper handling equipment to accept simplex copies in upper feed tray 35.
  • the simplex copy is then once again reprocessed through the xerographic transfer station to form a duplex image and then discharged from the machine as described above.
  • the next and final station in the automatic xerographic reproducing apparatus is a drum cleaning and toner recovery station E at which cleaning apparatus constructed in accordance with the present invention removes substantially all residual toner particles remaining on'the xerographic drum surface after image transfer and recovers the residual toner as removed for reuse in the automatic reproducing apparatus in a manner to be described below.
  • a rectangular shaped flexible blade is utilized in the preferred embodiment of the present invention to remove residual toner from the movingdrum surface.
  • the blade is securely mounted in a suitable blade holder 51 formed by a dependent wall of the cleaning housing 40.
  • the blade in a working condition, normally rests transverselyin pressure contact across the entire drum surface as illustrated in FIG. 5.
  • the cutting edge of the blade that is, the edge of the blade formed by the upper face surface, or top surface 47 and the front side surface 48, is positioned slightly below the horizontal center line of the drum and the cutting edge held in a manner to readily cut or chisel toner material from the drum surface much in the same manner as the lathe cutting tool removes material from a work piece.
  • non-metallic flexible cleaning blade material exhibiting high resiliency and high tensile strength may be employed in the cleaning apparatus of the present invention.
  • Typical non-metallicflexible materials include: polysiloxane rubber, polyurethane rubber, polytetrafluoroethylene resin, polytrifluorochloroethylene resin, styrenebutadiene rubber, nitrile rubber, nitro-silicone rubber, flexible polyurethane foam, polyethylene resin, and blends, mixtures and copolymers thereof.
  • the blade should be, however, sufficiently soft enough to minimize abrasion to the support surface and, in particular, abrasion to a selenium type imaging type surface.
  • the blade material should preferably have a Shore hardness of between 55 and 70 durometers, a tensile modulus of between 200 and 300 psi at 100 percent elongation, and have a resiliency giving a 35 percent rebound when tested by ASTM standard test'D-l564. Tests have shown that a relatively wide latitude in the thickness of the blade can be tolerated with no noticeable change in the quality of the cleaning produced.
  • the entire cleaning housing 40 is mounted upon a pivot arm 58 which is, in turn, pivotally supported upon shaft 59 securely affixed to the machine frame. To facilitate the removal of the drum from the machine, the entire housing 40 is capable of being swung downwardly about shaft 59 moving the blade out of interference with the drum surface. As can be seen, open side channel 53 (FIG. 2) pivots downwardly to form a trough capable of containing any loose toner particles which may be within the housing at the time of drum removal.
  • a spring biased latch 86 is locked into supporting engagement with a latch pin assembly 87 and the latch locked in place by means of locking mechanism 88. With the assembly in operative position, the cutting edge of the flexible blade is supported in pressure contact with the drumsurface as illustrated in FIG. 5.
  • the blade is constructed of a polyurethane material having the physical properties herein disclosed and being supported in a cantilever fashion within housing 40 with the blade extending a length (L) beyond the support holder 51.
  • the cutting edge of the blade is placed in pressurecontact against the drum surface causing the blade to be deflected a distance (d).
  • the blade will exert a pressure upon the surface and adjust itself to any irregularities found in the drum surface thereby maintaining edge contact across the drum surface. It has beenfound that a deflection which is equal to the unsupported length raised to the third power (L will give optimum cleaning with a minimum amount of blade chatter for blade lengths between 0.35 and 0.50 inch.
  • a back rake angle, angle (a) in FIG. 5, of about 95 and a edge relief ang'le (b) of approximately 25 reduces blade chatter to a minimum while at the same time, supporting the blade in a position to provide excellent cutting action.
  • a bead chain drive sprocket 63 is rotatably mounted on shaft 82 which is journaled for rotation in drive housing 61.
  • the drive sprocket is driven directly from the main machine drive through screw conveyor shaft 54.
  • Driven gear 84 mounted on the bottom end of shaft 54, as shown in FIG. 3, turns intermediate gear 83 which, in turn, drives sprocket drive gear 81 in the desired direction.
  • Passing over the rim of the drive sprocket 63 is endless bead chain 64.
  • the drive sprocket is arranged to engage and guide the bead and link members of the chain to move the chain in the direction indicated.
  • the residual toner which is collected in reservoir area 57 of the drive housing 61 is transported back to the developer housing by means of a conveyor system made up of supply and return tubing 66, 67; developer housing connector 70; and toner metering and return loop 71.
  • the various parts making up the conveyor system are mated together so that a continuous substantially closed circuit conduit 68 having a uniform inside diameter runs from reservoir area 57 across the width of the developer housing and returns once again to said reservoir.
  • the endless bead chain-passes over drive sprocket 63 and is arranged to move through conduit 68 along a circular path of travel extending from the reservoir area through the developer housing and back.
  • the inside diameter of conduit 60 is slightly larger than the diameter of the chain beads so that the beads will move freely, through the conduit but yet be capable of pushing particulate toner material therethrough.
  • the endless chain moves downwardly through the collected toner material in reservoir area 57.
  • the chain beads mechanically force the particulate toner material downwardly into supply tubing 66.
  • the tubing is secured in operative relation with the drive housing by pressingthe tubing firmly into the receiving adapter positioned in the bottom of the drive housing plate 65.
  • the housing support shaft 59 is best located upon the tangent line (t) wherein impact and frictional forces generated by the moving drum are absorbed by the support shaft.
  • the open side channel 53 is closed at one end by means of end plate 56 while the opposite end of the channel is securely mounted in drive housing 61.
  • the channel communicates with a reservoir or collecting area, generally referred to as 57, within the housing.
  • a top portion of shaft 54 as seen in FIG. 3, extends through end plate 56 and has rigidly affixed thereto driving gear 85.
  • driving gear 85 is driven from the machine main drive system to rotate the conveyor in a direction whereby the screw transports toner material laterally behind the blade into reservoir area 57 wherein the residual toner is collected.
  • tubing 66 is similarly connected in developer housing connector 70.
  • Supply tubing 66 and the return tubing 67 are preferably constructed of a flexible plastic material which, as shown in FIG. 1, is conveniently routed from the toner cleaning and collecting apparatus 40-to the developer housing 20 through the machine so as to avoid the stationary machine components.
  • toner cleaning and collecting apparatus 40 is conveniently routed from the toner cleaning and collecting apparatus 40-to the developer housing 20 through the machine so as to avoid the stationary machine components.
  • New toner is dispensed in the present apparatus by means of a roll'dispenser 77 positionedin the bottom portion of toner dispensing bottle 75.
  • the bottle isseated between rails 73, 74 (FIG. 4) extending laterally across'the dispensing opening provided in the developer housing.
  • the bottle is adapted to dispense toner at a predetermined rate directly into the developer housing as dispensing roll 77 is rotated in the direction indicated.
  • Developer housing connector 70 is secured to the developer housing by affixing embossed sections 72 thereon to rails 73, 74 as for example, by screws.
  • the head chain which has transported toner material through supply tubing 66, is guided through approximately a 90 turn as the chain passes through connector 70 so that the chain leaves the connector along a path of travel substantially parallel to rail 73.
  • Loop 71 which is also fabricated ofa relatively rigid plastic material, is supported in the connector 70 so that the loop is suspended just below the toner dispenser bottle in substantially parallel relation to the support rails.
  • the bead chain entering the dispensing area of the developer housing first passesthrough a portion of tubing having a series of steplike cut-outs 90 formed in one side wall of the U-shaped tubing. As illustrated in FIG. 5, the elevation of each cut-out istoner is distributed equally across the width of the housing.
  • the bead chain continues around the loop and once again makes a 90 turn through connector 70 and returns once again to drive housing 61 through return tube 67.
  • seals are provided between the top of the open side channel 53 and the rotating drum surface to prevent residual toner material from escaping from the toner cleaning and collecting apparatus 40. As can be seen, because a close system is thus provided, little or no free toner material is permitted to escape to the surrounding machine areas.
  • the toner cleaning and recovery system as herein disclosed is not only extremely clean to operate but also protects the surrounding machine components from being contaminated by loose or free toner particles.
  • an elongated blade constructed of a resilient elastomeric material, said blade having a top surface and one side surface meeting at an acute angle to from an extended cutting edge at one end of said blade, the acute angle facing at a first direction,
  • an image retaining member having a surface capable of electrostatically supporting dry toner powder particles thereon
  • an elongated blade constructed of a resilient elastomeric material, said blade having a top surface and at least one other side surface meeting at an acute angle to from an extended cutting edge at one end of said blade, the acute angle facing in a first direction,
  • an image retaining member formed in a closed loop configuration having a surface capable of electrostatically supporting dry toner particles thereon, means positioned adjacent said member to securely mount the opposite end of said blade therein and being arranged to position the cutting edge of the blade in pressure contact with the member, and means to move the surface of said member in a path of movement in a direction generally opposite said first mentioned direction whereby the dry toner powder particles on said member are caused to move over the top surface of said blade.
  • said mounting means is pivotable about a line which lies substantially in a plane tangent to the line on said member where said member is contacted by said blade.
  • an image retaining member in an endless configuration and having a surface capable of electrostatically supporting dry toner powder particles thereon, an elongated generally rectangular shaped blade constructed of a resilient, elastomeric material, said blade having a top surface and one side surface meeting at an acute angle to from an extended cutting edge at the upper end of said blade, mounting means positioned adjacent said member to securely mount the lower end of the blade therein and being arranged to position the cutting edge of the blade in pressure contact with the member wherein the blade is deflected over the unsupported length thereof, means to produce relative motion between the blade and 7.
  • the combination as set forth in claim 6 wherein the cutting edge of said blade is supported transversely across the drum surface in contact with a downwardly moving portion of the drum below the horizontal center line thereof.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Cleaning In Electrography (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
US838984A 1969-07-03 1969-07-03 Cleaning apparatus Expired - Lifetime US3660863A (en)

Applications Claiming Priority (1)

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US83898469A 1969-07-03 1969-07-03

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US3660863A true US3660863A (en) 1972-05-09

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US (1) US3660863A (en, 2012)
JP (1) JPS5437503B1 (en, 2012)
AT (1) AT324838B (en, 2012)
BE (1) BE752937A (en, 2012)
CA (1) CA925659A (en, 2012)
CH (1) CH514165A (en, 2012)
DE (1) DE2032370C3 (en, 2012)
DK (1) DK129483B (en, 2012)
ES (1) ES381388A1 (en, 2012)
FI (1) FI55589C (en, 2012)
FR (1) FR2054087A5 (en, 2012)
GB (1) GB1259446A (en, 2012)
NL (1) NL160099C (en, 2012)
NO (1) NO133164C (en, 2012)
PL (1) PL81341B1 (en, 2012)
SE (1) SE359942B (en, 2012)
SU (1) SU384250A3 (en, 2012)
ZA (1) ZA704533B (en, 2012)

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US20160324692A1 (en) * 2014-01-10 2016-11-10 3M Innovative Properties Company Molded Foam Push-To-Fit Earplug, Method And Devices

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USRE30924E (en) * 1970-03-10 1982-05-11 Canon Kabushiki Kaisha Cleaning apparatus for electrophotography
USRE28568E (en) * 1970-03-30 1975-10-14 Electrophotographic copying machine
US3901146A (en) * 1971-02-15 1975-08-26 Alsacienne Constr Meca Squeegee mount for independent pressure and angle adjustments
US3822642A (en) * 1971-08-02 1974-07-09 G Grindeland Apparatus for removing foreign particles from a lithographic press
US3838472A (en) * 1971-09-27 1974-10-01 Xerox Corp Toner cleaning apparatus
US4026648A (en) * 1971-12-17 1977-05-31 Canon Kabushiki Kaisha Cleaning device for use in electrophotographic copying apparatus
US3927936A (en) * 1972-07-18 1975-12-23 Canon Kk Blade type cleaning device in an electrophotographic copying machine of the image transfer type
US3918808A (en) * 1972-12-21 1975-11-11 Ricoh Kk Photoreceptor cleaning device for electrophotographic copying apparatus of the dry cleaning agent type
US3936183A (en) * 1973-03-09 1976-02-03 Fuji Xerox Co., Ltd. Electrophotographic copying machine with improved cleaning blade
US3848993A (en) * 1973-05-03 1974-11-19 Xerox Corp Supported developer blade cleaning
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US3917398A (en) * 1973-07-20 1975-11-04 Canon Kk Cleaning device
US3881859A (en) * 1973-11-23 1975-05-06 Xerox Corp Stripper finger design to prevent {37 oil-on-the-copy{38
US3918809A (en) * 1974-06-24 1975-11-11 Xerox Corp Apparatus for cleaning a surface support
US3913521A (en) * 1974-06-24 1975-10-21 Xerox Corp Composite doctoring blade for a heated fuser roll utilized for fixing toner
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JPS516936U (en, 2012) * 1974-06-29 1976-01-19
US4076564A (en) * 1974-09-16 1978-02-28 Xerox Corporation Roughened imaging surface for cleaning
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US3973845A (en) * 1975-01-15 1976-08-10 Xerox Corporation Method of reducing friction in blade cleaning of imaging surfaces
US4111545A (en) * 1975-02-06 1978-09-05 Xerox Corporation Vibrating blade cleaner
US4030824A (en) * 1975-11-03 1977-06-21 Xerox Corporation Reproducing apparatus having an improved imaging surface cleaning system
JPS5376934U (en, 2012) * 1976-11-30 1978-06-27
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JPS5481853A (en) * 1977-12-13 1979-06-29 Ricoh Co Ltd Developer treating method in recording apparatus
JPS54116932A (en) * 1978-03-03 1979-09-11 Ricoh Co Ltd Powder toner conveyor
US4284345A (en) * 1978-09-19 1981-08-18 Minolta Camera Kabushiki Kaisha Blade-type cleaning device for electrophotographic copying machine
US4334766A (en) * 1978-09-19 1982-06-15 Minolta Camera Kabushiki Kaisha Blade-type cleaning device for electrophotograhic copying machine
JPS5545012A (en) * 1978-09-25 1980-03-29 Canon Inc Toner circulating and reusing device
US4325628A (en) * 1978-11-30 1982-04-20 Canon Kabushiki Kaisha Cleaning device for an image forming apparatus
US4373798A (en) * 1979-04-23 1983-02-15 Canon Kabushiki Kaisha Developing device with shutter blade
US4264191A (en) * 1979-10-22 1981-04-28 Xerox Corporation Electrophotographic imaging system including a laminated cleaning and/or doctor blade
US4406039A (en) * 1980-08-04 1983-09-27 Hotz Hans R Device for cleaning the rolls of draft rolling mills of textile machines
US4469434A (en) * 1981-01-27 1984-09-04 Konishiroku Photo Industry Co., Ltd. Cleaning apparatus for electrophotography
US4440488A (en) * 1981-09-03 1984-04-03 Mita Industrial Company Limited Cleaning device for an image-carrying member
US4488802A (en) * 1982-01-14 1984-12-18 Fuji Xerox Co., Ltd. Electrophotographic device with single stations serving multiple functions
US4520917A (en) * 1982-03-03 1985-06-04 Thomas J. Wright Conveyor belt cleaning methods and apparatuses therefor
GB2135937A (en) * 1983-01-11 1984-09-12 Canon Kk Improved doctor blade
US4619523A (en) * 1983-07-27 1986-10-28 Mita Industrial Co., Ltd. Toner cleaning apparatus in electrophotography
US4802928A (en) * 1984-08-13 1989-02-07 Thermo Electron-Web Systems, Inc. Doctoring apparatus and method employing prestressed doctor blade
US4796057A (en) * 1986-07-25 1989-01-03 Xerox Corporation Toner cleaning apparatus
US4724459A (en) * 1986-12-29 1988-02-09 Eastman Kodak Company Apparatus for selectively recycling used toner or delivering such toner to a container
US4958197A (en) * 1987-10-30 1990-09-18 Sharp Kabushiki Kaisha Cleaning blade with a surface active antistatic agent
USRE35528E (en) * 1989-12-05 1997-06-10 Ricoh Company, Ltd. Image recording apparatus having a toner supply tank and a toner recovery tank configured into a unitary, disposable magazine
US5081505A (en) * 1990-08-01 1992-01-14 Eastman Kodak Company Cleaning apparatus having indexable wiper blades
US5315357A (en) * 1991-07-15 1994-05-24 Ricoh Company, Ltd. Cleaning unit provided in xerographic image forming apparatus for removing residual toner from an image carrier
US5321483A (en) * 1991-07-20 1994-06-14 Ricoh Company, Ltd. Cleaning device for image forming equipment
US5329646A (en) * 1991-09-27 1994-07-19 Cherne Industries Incorporated Drain flusher device
US5470635A (en) * 1992-04-16 1995-11-28 Canon Kabushiki Kaisha Blade member having a flat-surface side and an angled-surface side
US5608509A (en) * 1992-04-16 1997-03-04 Canon Kabushiki Kaisha Process cartridge with blade member having a flat-surface side and an angled-surface side
US5319431A (en) * 1993-06-30 1994-06-07 Xerox Corporation Apparatus for increased toner storage capacity
US6044241A (en) * 1998-08-28 2000-03-28 Xerox Corporation Dual charging and metering of development member
US6134405A (en) * 1999-02-26 2000-10-17 Xerox Corporation Combined charging and cleaning blade
US20070242991A1 (en) * 2006-04-14 2007-10-18 Konica Minolta Business Technologies, Inc. Cleaning member and image forming apparatus
US7907884B2 (en) * 2006-04-14 2011-03-15 Konica Minolta Business Technologies, Inc. Cleaning member and image forming apparatus
US8380116B2 (en) 2010-07-21 2013-02-19 Xerox Corporation Cleaning edge modification for improved cleaning blade life and reliability
US8428481B2 (en) 2010-07-21 2013-04-23 Xerox Corporation Long life cleaning system with reduced stress for start of cleaning blade operation
US8543048B2 (en) 2010-07-21 2013-09-24 Xerox Corporation Electrophotographic marking system with blade cut angles for longer blade life
US20120243925A1 (en) * 2011-03-25 2012-09-27 Canon Kabushiki Kaisha Cleaning unit and image forming apparatus
US8750749B2 (en) * 2011-03-25 2014-06-10 Canon Kabushiki Kaisha Cleaning unit and image forming apparatus
US20160324692A1 (en) * 2014-01-10 2016-11-10 3M Innovative Properties Company Molded Foam Push-To-Fit Earplug, Method And Devices

Also Published As

Publication number Publication date
DE2032370B2 (de) 1979-05-23
ZA704533B (en) 1971-03-31
FR2054087A5 (en, 2012) 1971-04-16
DK129483C (en, 2012) 1975-03-03
NL160099C (nl) 1979-09-17
DE2032370A1 (de) 1971-01-14
NO133164C (en, 2012) 1976-03-17
FI55589C (fi) 1979-08-10
SU384250A3 (en, 2012) 1973-05-23
GB1259446A (en, 2012) 1972-01-05
NL160099B (nl) 1979-04-17
BE752937A (fr) 1971-01-04
JPS5437503B1 (en, 2012) 1979-11-15
DK129483B (da) 1974-10-14
SE359942B (en, 2012) 1973-09-10
NL7009830A (en, 2012) 1971-01-05
ES381388A1 (es) 1972-12-01
AT324838B (de) 1975-09-25
FI55589B (fi) 1979-04-30
CH514165A (de) 1971-10-15
DE2032370C3 (de) 1983-05-26
CA925659A (en) 1973-05-08
NO133164B (en, 2012) 1975-12-08
PL81341B1 (en, 2012) 1975-08-30

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