US3879124A - Apparatus for removing remnants of powder images in electrophotographic copying machines - Google Patents

Apparatus for removing remnants of powder images in electrophotographic copying machines Download PDF

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Publication number
US3879124A
US3879124A US397652*[A US39765273A US3879124A US 3879124 A US3879124 A US 3879124A US 39765273 A US39765273 A US 39765273A US 3879124 A US3879124 A US 3879124A
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United States
Prior art keywords
layer
band
combination
bristles
brush
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Expired - Lifetime
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US397652*[A
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English (en)
Inventor
Rudolf Eppe
Georg Fryda
Ludwig Mullritter
Gunther Schnall
Hans-Joachim Schrecke
Josef Pfeifer
Gunther Abbe
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SCHRECKE HANS#JOACHIM
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Individual
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Priority claimed from DE19722245575 external-priority patent/DE2245575C3/de
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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
    • G03G21/0035—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 brush; Details of cleaning brushes, e.g. fibre density
    • 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
    • G03G21/0041—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 band; Details of cleaning bands, e.g. band winding

Definitions

  • the bristles are deformed on contact with the photoconductive layer and propel particles of toner against a travelling toner-retaining band which is collected by a rotary takeup reel and is guided by a wall of an expendable plastic casing for the brush and takeup reel in such a way that an unsupported stretch thereof extends from a point close to the photoconductive layer to a projection of the wall which maintains the band in contact with and causes the band to deform the bristles.
  • the casing carries a supply reel for the band and is installed in a receptacle extending radially of the copying cylinder. The open end of the receptacle can be closed by a lid which thereby causes two clutches to engage the shafts of the brush and takeup reel with the output shafts of two discrete motors.
  • the present invention relates to electrophotographic copying machines wherein powder images containing particles of toner are formed on a photoconductive layer and are transferred onto a carrier while the layer travels along an endless path.
  • the cleaning apparatus for removing remnants of toner comprises a rotary brush having a core which is surrounded by a coating of felt or by discrete bristles consisting of animal hairs or of hairs made from a suitable synthetic plastic material.
  • Certain cleaning apparatus use brushes whose bristles consist of mink or rabbit hairs.
  • the brush is permanently installed adjacent to the path of movement of the photoconductive layer and the cleaning apparatus further comprises a vacuum cleaner which removes toner particles from the bristles and prevents the thus removed toner particles from contaminating the machine.
  • a drawback of such cleaning apparatus is that the provision of a vacuum cleaner contributes excessively to their initial and maintenance cost.
  • toner-collecting bands contribute to the lower cost of the cleaning apparatus; however, the presently known bands (mainly due to the manner in which they are mounted in the copying machine) are incapable of collecting sufficient quantities of toner and/or of properly cleaning the rotating brush so that the copying machine is contaminated after short periods of use and the accumulation of toner in the brush proper is excessive.
  • An object of the invention is to provide an electrophotographic copying machine with a novel and improved apparatus which is capable of collecting large quantities of surplus toner without resorting to vacuum cleaners and/or electrostatic cleaning devices.
  • Another object of the invention is to provide novel and improved means for collecting toner particles which are removed from the photoconductive layer by one or more rotary brushes.
  • a further object of the invention is to provide a cleaning apparatus which is sufficiently inexpensive to warrant the manufacture of the majority of its parts as an expendable assembly which can be discarded after a prolonged period of use.
  • An additional object of the invention is to provide a novel and improved mounting for the toner-collecting band or web in an apparatus for collecting surplus toner in an electrophotographic copying machine.
  • Still another object of the invention is to provide a cleaning apparatus wherein the rotary parts are automatically disengaged from one or more prime movers when the user decides to gain access to the cleaning apparatus.
  • a further object of the invention is to provide a cleaning apparatus which can be installed in existing copying machines with minimal and inexpensive alterations of such machines.
  • Another object of the invention is to provide a cleaning apparatus whose toner-collecting capacity is surprisingly high in spite of the fact that the tonercollecting parts are preferably of the expendable type and that the apparatus does not employ electrostatic and/or vacuum-operated toner collecting devices.
  • the invention is embodied in an electrophotographic copying machine which comprises a photoconductive layer movable in a predetermined direction (the layer may be a cylinder which rotates about its axis) and along an endless path to thereby receive tonercontaining powder images in a first portion and to be relieved of powder images in a second portion of the path whereby at least some toner particles normally adhere or are likely to adhere to the layer in a third portion of the path along which successive portions of the layer travel on their way from the second toward the first path portion.
  • the copying machine further comprises a cleaning apparatus which serves to remove toner from the photoconductive layer in the third portion of the endless path and comprises a substantially cylindrical brush having a rotary core and flexible toner-removing bristles which surround the core and contact successive increments of the layer whereby the bristles undergo a certain amount of deformation in response to movement into contact with the layer and reassume their undeformed positions relative to the core in response to termination of contact with the layer, a source (e.g., a supply reel) of bank-like toner-collecting material, rotary takeup means for drawing the band-like material from the source, and guide means for the band-like material.
  • a cleaning apparatus which serves to remove toner from the photoconductive layer in the third portion of the endless path and comprises a substantially cylindrical brush having a rotary core and flexible toner-removing bristles which surround the core and contact successive increments of the layer whereby the bristles undergo a certain amount of deformation in response to movement into contact with the layer and reassume their undeformed positions relative
  • the guide means may constitute a wall member which forms part of an expendable casing or magazine for the brush and takeup means and which comprises a projecting portion (e.g., a rib which is parallel to the axis of the brush) for urging the band-like material against the bristles downstream of the locus where the bristles move away from contact with the layer and a second portion (e.g., a suitably rounded deflector) which is closely adjacent to the layer.
  • a projecting portion e.g., a rib which is parallel to the axis of the brush
  • a second portion e.g., a suitably rounded deflector
  • the band-like material travels from the second portion toward the projecting portion of the guide means so that a stretch of the band-like material between the two portions of the guide means remains unsupported and serves to intercept toner particles which leave the brush as a result of termination of deformation of the bristles and/or under the action of gravity and/or centrifugal force.
  • the projecting portion of the guide means preferably causes the band-like material to penetrate into the brush and to deform the bristles to thereby further enhance the separation of toner particles from the brush before the bristles return into contact with the photoconductive layer.
  • FIG. 1 is a fragmentary sectional view of an electrophotographic copying machine which embodies the improved cleaning apparatus
  • FIG. 2 is a sectional view as seen in the direction of arrows from the line 11-11 of FIG. 1.
  • FIG. 1 there is shown a portion of an electrophotographic copying machine which comprises a housing 1 including two mutually inclined walls v 2, 3 which form part of a channel or receptacle fora magazine or casing 12.
  • the receptacle or channel including the walls 2, 3 has an open inner end which is adjacent to the periphery of a rotary copying cylinder 4 having a cylindrical layer 5 of photoconductive material.
  • the outer end of the receptacle or channel including the walls 2, 3 is also open but can be closed by a cover member or lid which is pivotally secured to the housing 1 by a hinge 6.
  • That portion of the lid 7 which is remote from the hinge 6 is provided with a projection 7a which can be engaged by a retaining lever pivotally mounted in the housing 1, as at 45, and being biased against a stop 46 by a relatively weak helical spring 47.
  • the lid 7 is closed to assume the position which is shown in FIG. l when the copying machine is in use and can be forcibly pivoted to an open position (whereby the projection 7a is automatically disengaged from the lever) when the operator wishes to gain access to the cleaning apparatus or when the operator wishes to remove a used cleaning apparatus prior to in sertion of a fresh cleaning apparatus into'the channel.
  • the copying cylinder 4 is driven to rotate in the direction indicated by an arrow A whereby the layer 5 travels along an endless path in a first portion of which it receives a powder image, in a second portion of. which it is relieved of the powder image, and a third portion of which is adjacent to the inner 'endof the channel including the walls 2 ,and3.
  • FIG. 1 merely shows a charging
  • the present invention provides a novel and improved apparatus whichcan be employed to remove from the layer 5 remnants of toner before the cleaned portions of the layer 5 return into register with theopening in the light conducting shaft 11. Were the particles of toner permitted to adhere to the layer 5, they could' influence the quality of the next powder image and/or contaminate the copying machine.
  • the cleaning or toner removing apparatus comprises the aforementioned magazine or casing 12 which is preferably mass-produced of a suitable synthetic plastic material so that it can be discarded after a certain period of use, together with all such components of the cleaning apparatus which are mounted therein and/or path of the layer 5.
  • the casing l2tapers in a direction toward the inner end of the receptacle or channel including the walls 2, 3 so that it can be automatically arrested at or close to an optimum distance from the layer 5 on the copying cylinder 4.
  • the side walls 12f, 123 see HO. 2
  • the casing 12 are provided with aligned openings for two stub shafts 13a, 13b at the respective axial ends of a cylindrical core 13 forming part of a substantially cylindrical brush further having a sleevebody consisting of bristles or hairs 14.
  • the core 13 may have a diameter of 30 millimeters and each bristle [4 may have a length of ll millimeters.
  • the bristles 14 may consist of flexible synthetic plastic material such I as is used for the making of artificial furs and are glued I mined optimum speed, for. example, at 600-800 RPM.
  • the distance between the axis of the core 13' and the axis of the copying cylinder 4 is preferably such that the minimum distance between the peripheral surface of the core 13 and the layer 5 is slightly less than the length of a bristle 14, e.g., 9-10 millimeters.
  • the bristles are deformed at M and are permitted to reassume their normal positions relative to the core 13 as soon as they move beyond the locus N.
  • the side walls 12f, 12g of the casing 12 are further provided with aligned openings for stub shafts 15a, 15b at the respective axial ends of a second core 15 which forms part of or constitutes a simple takeup reel for band-like, toner-collecting material 16 (hereinafter called the band for short).
  • the source of band 16 is a supply reel having a'core 18 provided with stub shafts 18a, 18b which extend with at least some friction into complementary openings or slots provided therefor in bearing brackets 17 which are integral with and are located externally of the casing 12. As shown in FIG. 1, the bearing brackets 17 extend toward the lid 7.
  • the surfaces 17A bounding the openings or slots in the bearing brackets 17 can be said to constitute a rudimentary braking means which insures that the supply reel including the core 18 offers a certain resistance to rotation when the takeup reel (core 15) is rotated counterclockwise, as viewed in FIG. '1, in order to collect the band 16.
  • the bearing brackets 17 with suitable friction pads which bear against one or both stub shafts 18a, 18b and/or against the core 18 to thereby offer a certain resistance to clockwise rotation of the supply reel.
  • the guide means for that portion of the band 16 which extends between the supply and takeup reels includes a section or wall member 12a of the casing 12.
  • the wall member 12a has an external surface 12A which faces away from the brush 13, 14 and an internal surface 128 which faces the adjacent bristles 14. During travel from the core 18 toward the core 15, successive increments of the band 16 travel along the external surface 12A and thereupon along the internal surface 128.
  • the wall member 120 has an end portion or deflector 12b which is closely adjacent to and defines with the layer 5 a narrow gap G through which the band 16 passes on its way toward the core 15 of the takeup reel.
  • the width of the gap G is preferably constant, i.e., the portion 12b of the wall member 12a is preferably parallel to the axis of the cylinder 4 and hence also to the axis of the core 13.
  • the wall member 12a further comprises a substantially triangular projecting portion 12c which extends from the surface 12B and deforms the adjacent bristles 14. That stretch (16a) of the band 16 which extends between the portion 12b and the projecting portion 12c is unsupported because the wall member 120 is provided with a depression or recess 12d.
  • the band 16 contacts the bristles 14 in a region ahead of the projecting portion 12c, as considered in the direction of rotation of the brush 13, 14.
  • the width of the gap G between the portion 12b of the wall member 12a and the layer 5 on the copying cylinder 4 need not substantially exceed 1 millimeter and is preferably between 0.5-1 millimeter.
  • the core 15 of the takeup reel is driven by a second prime mover (e.g., an electric motor 39 shown in FIG. 2) at such a speed that the lengthwisemovement of band 16 in the direction indicated by the arrow C is very slow, e.g., l millimeter per copy.
  • the projecting portion 120 can penetrate into the annulus of bristles 14 to a depth of 2-3 millimeters, i.e., the distance between the tip of the projecting portion 12c and the periphery of the core 13 is preferably 8-9 millimeters.
  • the stretch 16a of the band 16 is under tension due to the provision of aforementioned braking means on the bearing brackets 17 for the core 18 of the supply reel.
  • a further wall member or portion 12e of the casing 12 defines with the layer 5 a second gap GG which is adjacent to the locus MM.
  • the left-hand end portion of the wall member 122 is connected with an elastic sealing element or lip 19 which contacts the layer 5 and the bristles 14 in the region of the locus M.
  • the angle between the left-hand surface of the lip 19 and the adjacent portion of the layer 5 is a relatively small acute angle.
  • the lip 19 may be made ofa strip of polyester foil having a thickness of 0.25 millimeter.
  • the width of the lip 19 (as considered in the circumferential direction of the layer 5) is preferably such that the free lower edge of the lip contacts the bristles 14 at or immediately adjacent to the locus M.
  • the main purpose of the lip 19 is to prevent escape of toner particles from the casing 12 along the wall member 12e; such particles could contaminate the corona discharge device including the electrode 9.
  • the copying machine is provided with two clutches which can be engaged to respectively connect the output shafts 42, 43 of the motors 38, 39 with the cores 13, 15. Furthermore, the copying machine comprises means (including the lip 7) for engaging or disengaging the two clutches.
  • the arrangement is preferably such that, when the casing 12 is properly inserted into the channel or receptacle including the walls, 2, 3, a movement of the lid 7 to closed position automatically entails an engagement of the two clutches so that the motor 38 can drive the core 13 and the motor 39 can drive the core 15, and that a movement of the lid 7 to open position automatically results in disengagement of the two clutches so that the casing 12 can be withdrawn through that (outer) open end of the channel which is normally closed by lid 7.
  • the actuating means for the two clutches comprises a first rod 22 which is articulately connected to the lid 7, as at 22a and is further articulately connected to a lever 23 in the housing 1.
  • the lever 23 is coupled with a similar lever 25 by means of a second rod 24 (see also FIG. 2).
  • the levers 23, 25 are respectively connected to and can turn two sleeves 27, 26 which are respectively rotatable on fixed cylindrical bearing elements 41, 40.
  • the sleeves 26, 27 are respectively provided with suitable inclined (substantially helical) cam faces 26a, 27a which can cooperate with complementary cam faces 28a, 29a of two sleeves 28, 29 in the housing 1.
  • the sleeves 28, 29 are movable axially of the respective bearing elements 40, 41 and are rigidly connected to each other by a web or rib 30 which is biased upwardly, as viewed in FIG. 2, by a helical spring 31 so that the cam faces 28a, 29a respectively bear against the cam faces 26a, 27a.
  • the bearing elements 40, 41 respectively receive axially movable clutch elements in the form of bolts 32, 33 which are respectively aligned with the stub shafts 13a, 15a of the cores 13, 15.
  • the bolt 32 has an enlarged portion or head 32a which is outwardly adjacent to the bearing element 40 and sleeve 28, and the bolt 33 has a similar head 33a which is outwardly adjacent to the bearing element 41 and and sleeve 29.
  • the inner end portions of the bolts 32, 33 are rounded and can enter suitable (preferably conical) sockets or recesses 13c, in the stub shafts 13a, 150 when the bolts 32, 33 are caused or allowed to move toward the cores 13, 15.
  • the bolts 32, 33 are respectively biased toward the cores 13, 15 by helical springs 34 and 35 which react against the housing 1 and respectively bear against collars 32b, 33b.
  • the stub shafts 13b, 15b are respectively provided with recesses or sockets 13d, 15d for conical centering projections 36, 37 of the output shafts 42, 43.
  • the centering projections 36, 37 cooperate with the rounded inner end portions of the bolts 32, 33 to respectively maintain the cores 13, 15 in exact parallelism with each other and with the axis of the cylinder 4 when the lid 7 is closed.
  • the conical centering projections 36, 37 preferably consist or carry coats of friction generating material so that they can rotate the cores 13, 15 by friction when the motors 38, 39 are on.
  • the rods 22, 24 turn the sleeves 27, 26 by way tions indicated by arrow D so that the rounded inner end portions of the bolts 32, 33 respectively penetrate into the sockets 13c, 15c and cause the sockets 13d. 15d to receive the conical centering projections 36, 37.
  • the cleaning apparatus is then ready for use and begins to accumulate toner'particles as soon asthe motors 38, 39 are started.
  • the closing of the .lid 7' not only results in establishment of a driving'connection between the output shafts 42, 43 andthe cores 13, 15 but that such closing also resultsin automatic centering of the cores 13, 15 with respect to the bolts 32, 33 and projections 36, 37 and hence in a movement of the brush and takeup reel to optimum positions with respect to the layer on the copying cylinder 4.
  • the inclination of the cam faces 26a, 27a, 28a, 29a is selected in such a way that the heads 32a, 33a move away from the, sleeves 28, 29 when the rounded inner end portions of the bolts 32, 33 extend into the sockets 130, 150.
  • the bolts 32, 33 are then free to per- I form limited axial movements. This is desirable to insure that the cores 13, are properly centered in spite of eventual deviations of the dimensions of sockets 13c, 13d, 15c, 15d from optimum dimensions and in spite of eventual substantial clearances with which the stub which are removed from the layer 5 by the bristles 14 are propelled against the stretch 16a of the band 16 between the portions 12b and 12c of the wall member l2a.
  • the material of the band 16 is such that it retains the toner particles and transportsthe intercepted particlestoward the core 15 of the takeup reel. This insures that the particles of toner cannot enter the copying machine proper where they could contaminate the parts at various stations surrounding the copying cylinder 4. Thus, the contamination of copying machine is avoided in spite of the fact that the cleaning apparatus does not employ a vacuum cleaner or an electrostatic toner collecting device. Moreover, the bristles l4 cooperate with the band 16 to insure a thorough and reliable cleaning of the layer 5 because the particles of'toner which reach the stretch 16a adhere to the band and are transported away from the layer 5.
  • the band 16 prevent a premature saturation of the brush with particles of toner, not only because the particles whichare propelled by the bristles 14 from the locus N toward the stretch 16a adhere to the band 16 but also because the stretch 16a contacts the bristles 14 immediately upstream of the projecting portion 120 which results in removal of substantial quantities of toner particle sfrom' the bristles 14. Since the stretch 16a travels v.jna di rection away from the gap G, the band 16 effectively prevents even minor accumulations of toner particles in the region of this gap when the copying machine is in use.
  • Accumulations of toner in the region of the gap G are highly undesirable because such toner could be entrained by the layer 5 beyond the cleaning 16a, i.e., which continue to adhere to the bristles 14 while the bristles move-from the locus N toward the projecting portion 120, are separated from the bristles 14 during'contact with the band 16 upstream of the portion 120.
  • the stretch 16a is in a highly satisfactory wiping contact with the bristles which also contributes to more reliable transfer of toner particles onto the stretch 16a before this stretch advances beyond theregion of direct contact with the bristles.
  • The'recess or depression 12d in the surface 128 of the wall member 12a preferably extends all the way from the portion 12b to the portion 1200f the wall member 120. This enables the stretch 16a to flex and to overlie a substantial portion of the brush 13, 14 (FIG. 1 shows that the stretch 16a contacts the bristles 14 along an arc of approximately 45). 7
  • the open side of the casing 12 (such open side faces the layer on the copying cylinder 4) is completely closed by the lip l9,bristles l4 and band 16 so that the particles of toner cannot escape from the casing 12 even if the latter is practically filled with toner. i.e., even when the major part of the band 16 is already convoluted on the core 15 of the takeup reel.
  • the lid 7 When the supply of clean band 16 on the core 18 is exhausted, the lid 7 is moved to its open position to thereby automatically disengage the motors 38, 39 from the cores l3, l5, and the operator simply withdraws the casing 12 with the empty core 18 from the receptacle including the walls 2, 3 prior to inserting a new casing with a full supply of fresh band 16 on the core 18. The lid 7 is thereupon returned to its closed position and the copying machine is ready for use.
  • the lip 19 is inclined and dimensioned in such a way that it properly engages the layer 5 and the bristles 14 of the respective brush even if the dimensions of one casing 12 deviate substantially from the dimensions of the next-following or preceding casing. This is attributed to the fact that the lip 19 makes an acute angle with the adjacent portion of the layer 5 and also that the width of the lip suffices to invariably insure the establishment of contact with the bristles 14 in the region of the locus M where the bristles undergo deformation in response to movement into contact with the layer 5.
  • the entire casing 12 preferably consists of a suitable synthetic plastic material which is sufficiently inexpensive to justify its disposal together with the cores 13, 15 and 18.
  • the major parts of the two clutches, the motors 38, 39 and the means for actuating the clutches are mounted in the housing 1 so that they can be used again and again even if the dimensions of successively inserted casings deviate substantially from each other.
  • an electrophotographic copying machine a combination comprising a photoconductive layer m0vable in a predetermined direction along an endless path to thereby receive toner-containing powder images in a first portion of said path and to be relieved of powder images in a second portion of said path whereby at least some toner particles normally adhere to said layer in a third portion of said path along which said layer advances toward said first portion; and apparatus for removing toner from said layer in said third portion of said path, comprising a substantially cylindrical brush including a rotary core and flexible toner-removing bristles surrounding said core and arranged to contact successive increments of said layer whereby said bristles undergo deformation in response to movement into contact with said layer and reassume their undeformed positions relative to said core in response to termination of contact with said layer, a source of band-like toner-collecting material, rotary takeup means for drawing said band-like material from said source, and guide means having a projecting portion for urging said band-like material against said bristles downstream of the locus
  • said source comprises a rotary supply reel for band-like material and said projecting portion of said guide means is spaced apart from said locus and extends into the path of movement of said bristles so that the bristles are flexed by the band-like material in the region of said projecting portion.
  • said guide means comprises a wall member having a first surface facing away from said brush and a second surface facing said brush, said band-like material being arranged to travel from said source toward said second portion of said guide means along said first surface and to travel from said second portion of said guide means toward said projecting portion of said guide means along said second surface of said wall member.
  • said second portion of said guide means constitutes a deflector which changes the direction of movement of said band-like material through an obtuse angle.
  • said apparatus further comprises a casing including said guide means and having an open end adjacent to said layer in the region of said third portion of said path.
  • said source comprises a rotary supply j reel for said band-like material and said bearing means comprises means for braking said supply reel while said takeup means rotates to collect said band-like material so that the band-like material is tensioned between said supply reel and said takeup means.
  • said casing includes a portion adjacent to said layer and located in the region of the locus where said bristles move into contact with said layer, and further'compris- I ing elastic sealing means provided on said portion of 'said casing and engagingsaid layer.
  • sealing means comprises a flexible lip making an acute angle with the adjacent portion of said layer.
  • said clutch means comprises reciprocable first and sec- 0nd clutch elements which are respectively coaxial ment relative to said motion transmitting means.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Cleaning In Electrography (AREA)
  • Brushes (AREA)
US397652*[A 1972-09-16 1973-12-05 Apparatus for removing remnants of powder images in electrophotographic copying machines Expired - Lifetime US3879124A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722245575 DE2245575C3 (de) 1972-09-16 Reinigungseinrichtung für elektrofotografische Kopiergeräte

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US3879124A true US3879124A (en) 1975-04-22

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US (1) US3879124A (sv)
JP (2) JPS49134336A (sv)
BE (1) BE804751A (sv)
CA (1) CA990340A (sv)
FR (1) FR2200555B1 (sv)
GB (1) GB1449225A (sv)
IT (1) IT994256B (sv)
NL (1) NL7312451A (sv)

Cited By (16)

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US3966316A (en) * 1974-07-27 1976-06-29 Agfa-Gevaert, A.G. Electrostatic copying machine with removable copying drum
US4021113A (en) * 1975-02-19 1977-05-03 Agfa-Gevaert, A.G. Cleaning device for electrostatic copiers
US4071296A (en) * 1975-02-19 1978-01-31 Agfa-Gevaert, Ag Electrostatic-copier cleaning device
US4151094A (en) * 1972-12-29 1979-04-24 Thermo Kinetics, Inc. Apparatus for removing solids from filter media
US4265705A (en) * 1978-06-16 1981-05-05 Valmet Oy Apparatus for cleaning doctor blades in paper machines
US4304026A (en) * 1979-10-01 1981-12-08 Xerox Corporation Cleaning apparatus for a xerographic reproduction machine
US4329044A (en) * 1977-12-28 1982-05-11 Canon Kabushiki Kaisha Cleaning apparatus
US4422750A (en) * 1981-03-25 1983-12-27 Konishiroku Photo Industry Co., Ltd. Developer replenishing device
US4734741A (en) * 1987-08-13 1988-03-29 Eastman Kodak Company Particulate material cleaning apparatus
WO1992021070A1 (en) * 1991-05-13 1992-11-26 Eastman Kodak Company Cleaning apparatus having a surface-conforming blade
US5416572A (en) * 1994-01-03 1995-05-16 Xerox Corporation Cleaning apparatus for an electrophotographic printing machine
WO1996035151A1 (de) * 1995-05-03 1996-11-07 Oce Printing Systems Gmbh Reinigungsvorrichtung für die fotoleitertrommel eines druck- oder kopiergerätes
US5689768A (en) * 1994-12-07 1997-11-18 Canon Kabushiki Kaisha Electrophotographing apparatus for collecting toner from a photosensitive member and conveying it to developing means
US20060002736A1 (en) * 2004-06-30 2006-01-05 Nobuo Kikuchi Method and apparatus for image forming capable of effectively replacing a facing mechanism used in the image forming
US20070036595A1 (en) * 2003-08-20 2007-02-15 Ken Amemiya Cleaning unit, process cartridge, image forming apparatus, and toner
US9075351B2 (en) 2012-07-03 2015-07-07 Konica Minolta, Inc. Cleaning device

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US3190198A (en) * 1960-12-23 1965-06-22 Xerox Corp Xerographic cleaning apparatus
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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4151094A (en) * 1972-12-29 1979-04-24 Thermo Kinetics, Inc. Apparatus for removing solids from filter media
US3966316A (en) * 1974-07-27 1976-06-29 Agfa-Gevaert, A.G. Electrostatic copying machine with removable copying drum
US4021113A (en) * 1975-02-19 1977-05-03 Agfa-Gevaert, A.G. Cleaning device for electrostatic copiers
US4071296A (en) * 1975-02-19 1978-01-31 Agfa-Gevaert, Ag Electrostatic-copier cleaning device
US4329044A (en) * 1977-12-28 1982-05-11 Canon Kabushiki Kaisha Cleaning apparatus
US4265705A (en) * 1978-06-16 1981-05-05 Valmet Oy Apparatus for cleaning doctor blades in paper machines
US4304026A (en) * 1979-10-01 1981-12-08 Xerox Corporation Cleaning apparatus for a xerographic reproduction machine
US4422750A (en) * 1981-03-25 1983-12-27 Konishiroku Photo Industry Co., Ltd. Developer replenishing device
US4734741A (en) * 1987-08-13 1988-03-29 Eastman Kodak Company Particulate material cleaning apparatus
WO1992021070A1 (en) * 1991-05-13 1992-11-26 Eastman Kodak Company Cleaning apparatus having a surface-conforming blade
US5416572A (en) * 1994-01-03 1995-05-16 Xerox Corporation Cleaning apparatus for an electrophotographic printing machine
US5689768A (en) * 1994-12-07 1997-11-18 Canon Kabushiki Kaisha Electrophotographing apparatus for collecting toner from a photosensitive member and conveying it to developing means
WO1996035151A1 (de) * 1995-05-03 1996-11-07 Oce Printing Systems Gmbh Reinigungsvorrichtung für die fotoleitertrommel eines druck- oder kopiergerätes
US5832355A (en) * 1995-05-03 1998-11-03 Siemens Nixdorf Informationssysteme Aktiengesellschaft Cleaning mechanism for the photoconductive drum of a printer or copier device
US20070036595A1 (en) * 2003-08-20 2007-02-15 Ken Amemiya Cleaning unit, process cartridge, image forming apparatus, and toner
US20060002736A1 (en) * 2004-06-30 2006-01-05 Nobuo Kikuchi Method and apparatus for image forming capable of effectively replacing a facing mechanism used in the image forming
US7359657B2 (en) * 2004-06-30 2008-04-15 Ricoh Company, Ltd. Method and apparatus for image forming capable of effectively replacing a facing mechanism used in the image forming
US9075351B2 (en) 2012-07-03 2015-07-07 Konica Minolta, Inc. Cleaning device

Also Published As

Publication number Publication date
GB1449225A (en) 1976-09-15
IT994256B (it) 1975-10-20
FR2200555B1 (sv) 1976-05-14
FR2200555A1 (sv) 1974-04-19
JPS5539412Y2 (sv) 1980-09-13
DE2245575A1 (de) 1974-03-21
JPS49134336A (sv) 1974-12-24
DE2245575B2 (de) 1976-08-19
JPS53142045U (sv) 1978-11-09
CA990340A (en) 1976-06-01
NL7312451A (sv) 1974-02-25
BE804751A (nl) 1974-03-12

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