US3667840A - Electrophotographic copier with removable drum - Google Patents

Electrophotographic copier with removable drum Download PDF

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Publication number
US3667840A
US3667840A US96939A US3667840DA US3667840A US 3667840 A US3667840 A US 3667840A US 96939 A US96939 A US 96939A US 3667840D A US3667840D A US 3667840DA US 3667840 A US3667840 A US 3667840A
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US
United States
Prior art keywords
drum
housing
layer
carrier
withdrawn
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.)
Expired - Lifetime
Application number
US96939A
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English (en)
Inventor
Herbert Engel
Karl Hartwig
Gunther Schnall
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.)
Agfa Gevaert AG
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Agfa Gevaert AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19691961836 external-priority patent/DE1961836C3/de
Application filed by Agfa Gevaert AG filed Critical Agfa Gevaert AG
Application granted granted Critical
Publication of US3667840A publication Critical patent/US3667840A/en
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
    • G03G21/1661—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
    • 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
    • G03G21/1604—Arrangement or disposition of the entire apparatus
    • G03G21/1623—Means to access the interior of the apparatus
    • 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
    • G03G2221/1618—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for the cleaning unit
    • 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
    • G03G2221/163—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for the developer unit
    • 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

Definitions

  • a xerographic carrier is mounted in a housing for travel in a predetermined direction and has an exposed photoconductive layer which is adapted to be uniformly charged in preparation for transfer of latent images to the layer.
  • the carrier can be withdrawn from the housing in a predetermined path.
  • a drum mounted on a stationary shaft in the housing.
  • a developer device is mounted in the housing and can move substantially radially of the drum between a position engaging the drum for discharging onto the same electroscopic developer material which forms on the charged layer powder images, and a withdrawn position remote from the carrier.
  • a cleaning device is also provided which can similarly be moved radially of the drum between a position engaging the latter and removing residual electroscopic developer material from the layer and a radially withdrawn position.
  • a moving arrangement is provided for moving one or both of these devices between their respective positions.
  • the moving arrangement includes a pivoting crank and a lever for pivoting it located adjacent to the accessible end of the drum. When the moving arrangement is in a location in which the one or both devices are in their operating positions, the lever will block Withdrawal of the drum from the housing.
  • the present invention relates generally to electrophotographic copiers, and in particular to improvements in xerographic copiers.
  • Xerographic copiers usually utilize a xerographic plate in form of a drum provided on its outer periphery with a layer of photoconductive material.
  • the drum is rotated and in so doing the layer sequentially passes past certain operating stations where it is first charged, whereupon a latent image is transferred to the layer which is subsequently developed by dusting pulverulent electroscopic developer material onto the layersuch material also being known as a tonerwhere it adheres at selected portions depending upon the charging and the previously transferred latent images.
  • the powder images which are thus formed on the layer are transferred to a copy sheet and the layer is then cleaned of residually adhering electroscopic material before it is recharged for the next copying process.
  • the xerographic drum in such devices is removable from the housing for certain purposes, namely inspection, repair, replacement and/or such cleaning which is not effected by the cleaning device. If this removal is carried out while the developer device supplying pulverulent electroscopic developer material to the layer, and/ or the cleaning device cleaning the layer of residual developer material, are in their respective operating positions, the
  • devices or components thereof may be damaged, and damage may also occur to the 'very delicate photoconductive layer on the xerographic drum and with which layer the devices are in contact when in their operating position.
  • a concomitant object of the invention is to provide such an improved xerographic copier which has novel and very simple means for blocking the withdrawal of the xerographic carrier from the housing while the developer device and/or the cleaning device are in their respective operating positions.
  • one feature of the invention resides, in an electrophotographic copier, in a combination comprising a housing and a xerographic carrier mounted in the housing for travel in a predetermined direction and having an exposed photoconductive layer adapted to be uniformly charged precedent to transfer of latent images to the layer, with the carrier being withdrawn from the housing in a predetermined path.
  • a developer device is mounted in the housing for movement between a first withdrawn position remote from the carrier and a first operating position in which it engages the travelling carrier for the purpose of applying pulverulent electroscopic developer material to the layer with resultant formation of powder images on the latter.
  • Transfer means transfers such powder images onto a copy sheet.
  • a cleaning device is arranged downstream of the transfer means mounted in the housing for movement between a second withdrawn position remote from the carrier and a second operating position in which it engages the carrier for cleaning residual pulverulent developer material from the layer.
  • moving means for moving at least one of these devices between the aforementioned positions thereof, and this moving means is displaceable between one location in which the one device is in its withdrawn position and another location in which the one device is in the aforementioned operating position thereof and in which the moving means blocks withdrawal of the carrier from the housing.
  • the moving means will move both of the devices in the above-indicated manner and in that case the withdrawal (and, of course, the insertion) of the xerographic drum is naturally greatly simplified because a simple operation of the moving means is sufficient to displace both devices to 7 their withdrawn positions to permit withdrawal of the xerographic drum, and subsequently after insertion of the xerographic drum, to place them into their respective operating positions.
  • both the developer device and the cleaning device are shiftable substantially radially of the xerographic drum and connected with leakage rods which are pivoted to the moving means so that upon operation of the moving means, the devices are displaced via the respective linkage rods.
  • the cleaning device may in conventional manner comprise a cleaning tape or paper or another suitable material which is convoluted about a supply roller from which it is withdrawn incrementally and taken up on a take-up roller.
  • a spring-biased or otherwise biased pressure roller incrementally presses the cleaning tape into engagement with the photoconductive layer on the xerographic drum when the cleaning device is in its operating position.
  • the pressure roller is connected with the moving means so that upon operation of the latter, the pressure roller is moved out of position in which it presses the cleaning tape against the layer on the xerographic drum.
  • the developer device is completely removable from the housing of the novel copier, for instance for inspection or replenishment of the electroscopic developer material a supply of which is accommodated in the developer device.
  • the removal of the developer device is particularly simple if the device is provided with supporting rollers which in the operating position of the developer device engage the peripheral surface of the Xerographic drum so that when the developer device is moved to operating position it will automatically be properly located with respect to the drum.
  • the linkage rod which serves to displace the developer device radially with reference to the drum between its operating position and withdrawn position advantageously is provided with biasing means which acts via the linkage rod upon the developer device "in a sense biasing the supporting rollers into engagement with the peripheral surface of the drum when the developer device is in operating position.
  • a slot which is elongated and inclined with reference to the direction of radial displacement of the developer device, and to provide a pin or analogous projection on the linkage rod which is guided in this slot and which, when the developer device approaches its operating position, cooperates with an abutment on the developer device preventing withdrawal of the latter from the housing, whereas when the developer device is in its withdrawn position, the projection disengages from the abutment and permits withdrawal of the developer device from the housing.
  • This is a particularly simple construction because the developer device is thus freed for entire withdrawal from the housing by operation of the moving means which moves it from its operating position to its withdrawn position.
  • this moving means may as already pointed out above, also be the instrumentality by means of which the cleaning device is displaced from operating position to withdrawn position and which blocks or permits withdrawal of the xerographic drum from the copier.
  • FIG. 1 is ta vertical somewhat diagrammatic sectional view of a copier emodying the present invention with the developer device and the cleaning device in operating position;
  • FIG. 2 is a view similar to FIG. 1 but illustrating the apparatus of FIG. 1 with the developer device and the cleaning device in withdrawn .position preparatory for withdrawal of the xerographic drum from the housing.
  • reference numeral 1 generally identifies a housing of an electrophotographic copier whose overall configuration is of no importance for purposes of the invention.
  • a shaft 2 onto which a xerographic drum 3 can be placed so as to be removably journalled thereon for rotation.
  • the drum 3 is provided in known manner with a photoconductive layer on its outer peripheral surface.
  • the drum 3 is driven in rotation in suitable manner also known to those skilled in the art, for instance by interengagement of gears provided on the drum and on the housing 1 which in turn are driven by a non-illustrated drive, and turns in the illustrated embodiment in counterclockwise direction. It is retained in position on the shaft 2 against axial displacement thereon by a nut 57 which is threaded onto an end portion of the shaft 2 provided for this purpose.
  • reference numeral 11 identifies a known corona charging device which charges the photoconductive layer on the travelling drum 3. Downstream of the device 11-as seen in the direction of rotation of the drum 3there is arranged an exposure device which serves to transfer latent images to the photoconductive layer.
  • the exposure device comprises a lens or objective 4, a stationary reflector 5 and movable refiectors 6, 7 and 8. It further comprises light sources 9 and a transparent supporting plate 10 on top of which an original to be copied (not shown) is to be supported with the side to be copied facing downwardly.
  • the light sources 9 may be mounted in a carriage which can move along and underneath the component 10.
  • the thus-charged increments thereupon travel past the exposure station or device at which an image of the original supported on the support 10 is projected via the reflectors 8, 7, 6, the lens 4 and the reflector 5 onto the successive increments of the photoconductive layer.
  • the thus-projected light produces a latent image of the original, which image is developed as the photoconductive layer travels past another operating station, a developing station or device 12.
  • the developing device 12 comprises a container 25 containing a quantity of pulverulent electroscopic developer material, also known as toner, with the container 25 being provided in its lower portion with apertures 26a through which a revolving dispensing device 26 dispenses controlled quantities of the toner powder, as it will hereafter be called for the sake of convenience so that they fall in the illustrated manner onto the scoops of a scoop conveyor 24.
  • the conveyor 24 as well as the device 26 are driven in non-illustrated manner, for instance by individual drives or by connection with the main drive of the copier, and the toner on the scoops of the scoop conveyor 24 is conveyed in clockwise direction upwardly for discharge from the upper end of the conveyor 24 onto the surface of the layer on the rotating drum 3.
  • the thus-discharged electroscopic material or toner powder adheres to selected portions of the photoconductive layer to form thereon a powder image. Excess toner powder falls onto the inclined casing portion 12a of the device 12 and slides to the lowermost point where it can be engaged by the advancing scoops of the scoop conveyor 24 as illustrated.
  • the powder image produced on the photoconductive layer moves past a transfer corona device 13 of known construction where it is transferred onto a copy sheet 17 supplied from a stack 20 resting on a pivoted spring-loaded supporting table 19 and supplied to the space between the device 13 and the photoconductive layer on the rotating drum 3 by transport rollers 21 and 22.
  • a transfer corona device 13 of known construction where it is transferred onto a copy sheet 17 supplied from a stack 20 resting on a pivoted spring-loaded supporting table 19 and supplied to the space between the device 13 and the photoconductive layer on the rotating drum 3 by transport rollers 21 and 22.
  • the discharge corona device 15 which permits release of the sheet from the drum.
  • a precise predetermined location of the upper discharge end of the scoop conveyor 24 with reference to the photoconductive layer on the peripheral surface of the xerographic drum 3 is automatically obtained without having to provide any adjustments.
  • the device 12 can further be withdrawn beyond the position shown in FIG. 2, by continuing to move it along the guide rails 29 so that it can be withdrawn to the exterior of the housing 1 for replenishment of the toner powder in the container 25, for inspection purposes, for cleaning purposes or the like.
  • the cleaning device 16 This device, also, can be withdrawn in analogous manner from the housing 1 after a nonillustrated locking arrangement is released, simply by gripping the handle 33 and exerting pull thereon. This is for the purpose of inspecting the device 16 if necessary, and also for replacing the soiled cleaning tape 32 with a new one, or for correcting a malfunction.
  • the cleaning tape may consist in known manner of paper or the like and is supplied on a supply roller 35 about which it is convoluted and from which it is incrementally withdrawn to be wound onto a take-up roller 34. The latter is driven in non-illustrated manner, for instance by connection in a suitable way with the main drive of the electro-photographic copier.
  • the tape 32 is maintained taut by being trained about guide rollers 37 and 38 and by being pressed against-the periphery of the rotating drum 3-and thereby against the photoconductive layer thereon-by a biased pressure roller 36 which is mounted on an arm 39 pivotable about the axis of the guide roller 37.
  • a tension spring 40 has one end connected to the housing 1 or another stationary component of the copier and other other end secured to the portion 39a of the arm 39 to thereby act upon the same in a sense pressing the pressure roller 36 against respective increments of the tape 32 whereby these increments are pressed against the photoconductive layer on the travelling drum 3.
  • a pin or projection 42 is provided on a linkage rod 33 and is guided in an elongated slot 41 of the housing 1.
  • the portion 39a of the arm 39 engages with the pin 42 and the linkage rod 43 is pivoted to a crank 44 which is mounted for turning movement on 'an axis 45 secured to a stationary component of the copier, for instance the housing'l.
  • a moving or operating lever 46 is mounted on the shaft 45 and located exteriorly of the housing '1, being provided with a handle 47. Turning of the lever 46 and thereby of the crank 44 elfects displacement of the arm 39 in clockwise direction counter to the action of the spring 40, so that the pressure roller 36 is thereby withdrawn from engagement with the drum 3. According to the invntion the lever 46 is so mounted that at least portions thereof extend into the path which the drum 3 or portions thereof must traverse when the drum 3 is to be withdrawn from the housing 1 and from the shaft 2. Evidently, this path is parallel to the shaft 2.
  • drum 3 can be withdrawn from the shaft 2 only when the lever 46 has been operated in a sense causing the pressure roller 36 to be withdrawn from contact with the drum 3 so that it no longer presses increments of the cleaning tape 32 against the drum 3. This makes it impossible to withdraw the drum 3 while such engagement exists, and avoids the danger of damage to the cleaning tape 32 and, even worse, of damage to the highly delicate photoconductive layer on the peripheral surface of the drum 3.
  • the cleaning device 16 can be removed at any time and irrespective of the position of the lever 46 or of the pressure roller 36, simply due to the fact that there is the contact between the portion 39a of the arm 39 and the pin 42, so that whenever it is desired to withdraw the device 16 for inseptction, replacement of the tape 32 or for other reasons, this can be carried out Without having to consider any other components of the copier and without having to accept the danger that harm might come to such components.
  • an additional linkage rod composed of a portion 53 which is pivoted to the crank 44 and a portion 50 which is provided with a pro jection or pin 49.
  • the adjacent end portions of the por-- tions 50 and 53 are connected in that the portion 50 is provided with a slot 50a extending longitudinally thereof and the portion 53 is provided with two pins 51 and 52 received in the slot.
  • a tension spring 55 is connected to the pin 51 and an additional pin 54 provided for this purpose on the portion 50.
  • the pin 49 is guided in an inclined slot 48 formed in the housing 1 for this purpose and engages with an abutment 12b provided on the device 12.
  • the device 12 will always assume an exactly predetermined position with reference to the drum 3 whenever the device 12 is moved to operating position, this predetermined position being determined by the engagement of the rollers 30 and 31 with the drum 3.
  • the arrangement and inclination of the slot 48 is such that when the device 12 approaches its right-hand end position shown in FIG. 1, the pin 49 will extend into the path of the abutment 12b which is determined by the guide rails 29, whereas in the left-hand end position shown in FIG. 2 the pin 49 will be located above the path of the abutment 12c and will not contact the same.
  • the device 12 when the device 12 has been moved to the withdrawn position shown in FIG. 2 by means of the lever 46, it can be further withdrawn out of the housing 1 without having to be decoupled or without having to be disconnected in any further way.
  • This means that movement of the device 12 from the position of FIG. 1 to the position of FIG. 2 by means of the lever 46 automatically releases the device 12 for further withdrawal beyond the position of FIG. 2 outwardly of the housing 1 and thus greatly simplifies the access to the device 12.
  • an electrophotographic copier in combination, a housing; a xerographic carrier mounted in said housing for travel in a predetermined direction and having an exposed photoconductive layer adapted to be uniformly charged precedent to transfer of latent images to said layer, said carrier being withdrawable from said housing in a predetermined path; a developer device mounted in said housing for movement between a first withdrawn position remote from said carrier, and a first operating position engaging the travelling carrier for applying pulverulent electroscopic developer material to said layer with resultant formation of powder images on the latter; transfer means for transferring such powder images onto a copy sheet; a cleaning device downstream of said transfer means and being mounted in said housing for movement between a second withdrawn position remote from said carrier, and a second operating position engaging said carrier for cleaning residual pulverulent developer material from said layer; and moving means operatively associated with at least one of said devices for moving the same between said positions thereof, said moving means being displaceable from a first position in which it extends into said path and blocks removal of said carrier and in which said at least one device is
  • said moving means in said one location being spaced in said path, and in said other location extending at least in part across said path.
  • said developer device comprising support rollers arranged to engage the peripheral surface of said drum when said developer device is in said first operating position thereof so as to steady said developer device and predetermine the spacing thereof from said layer.
  • said cleaning device comprising support rollers, a cleaning tape trained about said support rollers, and a springloaded pressure roller for pressing said cleaning tape incrementally against said layers; and wherein said moving means comprises a displaceable actuating portion and a linkage rod between the same and said pressure roller for moving the same and said cleaning tape away from said layer in response to displacement of said actuating portion.
  • said cleaning device further comprising a pivot arm mounting said pressure roller for biased engagement with said tape in a sense pressing increments thereof against said layer; and wherein said linkage rod is connected with said pivot arm for pivoting the same in response to displacement of said actuating portion.
  • said linkage portion being elongated substantially in the direction of movement of said developer device and comprising a projection; said developer device comprising an abutment positioned for engaging said projection in a sense preventing withdrawal of said de veloper device from said copier when said developer device approaches said first operating position, and for disengaging said projection in a sense permitting withdrawal of said developer device .whenthe latter approaches said first withdrawn position; and further comprising a slot in a stationary component of said copier inclined to the direction of movement of said developer device and guiding said projection.
US96939A 1969-12-10 1970-12-10 Electrophotographic copier with removable drum Expired - Lifetime US3667840A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691961836 DE1961836C3 (de) 1969-12-10 Elektrostatisches Kopiergerät

Publications (1)

Publication Number Publication Date
US3667840A true US3667840A (en) 1972-06-06

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Application Number Title Priority Date Filing Date
US96939A Expired - Lifetime US3667840A (en) 1969-12-10 1970-12-10 Electrophotographic copier with removable drum

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US (1) US3667840A (de)
JP (1) JPS4920549B1 (de)
BE (1) BE759792A (de)
CH (1) CH526802A (de)
FR (1) FR2072902A5 (de)
GB (1) GB1337747A (de)
NL (1) NL7017714A (de)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4955049U (de) * 1972-08-21 1974-05-15
US3827801A (en) * 1972-03-16 1974-08-06 Minolta Camera Kk Electrophotographic copier of image transfer type
US3834804A (en) * 1972-12-06 1974-09-10 Xerox Corp Copying machine with means for mounting carrier bead pickoff roller therein
US3879123A (en) * 1973-01-26 1975-04-22 Powell B J Copy machine
US3966316A (en) * 1974-07-27 1976-06-29 Agfa-Gevaert, A.G. Electrostatic copying machine with removable copying drum
US3975096A (en) * 1973-06-28 1976-08-17 Lumoprint Zindler Kg Electrophotographic copying machines
US3985436A (en) * 1974-06-25 1976-10-12 Minolta Camera Kabushiki Kaisha Electrophotographic copying apparatus
US3998548A (en) * 1974-08-14 1976-12-21 Fuji Xerox Co., Ltd. Sensitive drum receiving device for use in electrophotographic reproducing machine
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
US4095980A (en) * 1975-06-11 1978-06-20 Ricoh Company, Ltd. Drum cleaning method and apparatus for electrostatography
US4110035A (en) * 1975-09-29 1978-08-29 Rank Xerox, Ltd. Cleaning system for an electrophotographic printing machine
FR2396340A1 (fr) * 1977-06-29 1979-01-26 Agfa Gevaert Ag Copieur electrostatique
US4470690A (en) * 1981-10-22 1984-09-11 Tetras, S.A. Removably mounted electrophotographic belt assembly for electrophotographic copier
US4598993A (en) * 1981-12-22 1986-07-08 Canon Kabushiki Kaisha Process unit and image formation apparatus provided with the process unit
US4598992A (en) * 1984-07-06 1986-07-08 Savin Corporation Electrophotographic copier having readily removable drum and improved drive system therefor
US5099280A (en) * 1987-10-30 1992-03-24 Mita Industrial Co., Ltd. Cleaning unit of a copying apparatus
US5142322A (en) * 1988-04-05 1992-08-25 Surti Tyrone N Electrophotographic copier process kit having support brackets for providing disassembly of internal process components
US5168308A (en) * 1989-07-29 1992-12-01 Konica Corporation Clamshell-type electrophotographic image forming apparatus
US5177542A (en) * 1991-10-07 1993-01-05 Eastman Kodak Company Method of xeroprinting
US5999771A (en) * 1998-03-19 1999-12-07 Fujitsu Limited Electrophotographic apparatus with removable photosensitive drum

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2564612B1 (fr) * 1984-05-16 1987-03-20 Mecilec Sa Ensemble de chargement pour copieur electrostatique

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3827801A (en) * 1972-03-16 1974-08-06 Minolta Camera Kk Electrophotographic copier of image transfer type
JPS5519936Y2 (de) * 1972-08-21 1980-05-13
JPS4955049U (de) * 1972-08-21 1974-05-15
US3834804A (en) * 1972-12-06 1974-09-10 Xerox Corp Copying machine with means for mounting carrier bead pickoff roller therein
US3879123A (en) * 1973-01-26 1975-04-22 Powell B J Copy machine
US3975096A (en) * 1973-06-28 1976-08-17 Lumoprint Zindler Kg Electrophotographic copying machines
US3985436A (en) * 1974-06-25 1976-10-12 Minolta Camera Kabushiki Kaisha Electrophotographic copying apparatus
US3966316A (en) * 1974-07-27 1976-06-29 Agfa-Gevaert, A.G. Electrostatic copying machine with removable copying drum
US3998548A (en) * 1974-08-14 1976-12-21 Fuji Xerox Co., Ltd. Sensitive drum receiving device for use in electrophotographic reproducing machine
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
US4095980A (en) * 1975-06-11 1978-06-20 Ricoh Company, Ltd. Drum cleaning method and apparatus for electrostatography
US4110035A (en) * 1975-09-29 1978-08-29 Rank Xerox, Ltd. Cleaning system for an electrophotographic printing machine
FR2396340A1 (fr) * 1977-06-29 1979-01-26 Agfa Gevaert Ag Copieur electrostatique
US4470690A (en) * 1981-10-22 1984-09-11 Tetras, S.A. Removably mounted electrophotographic belt assembly for electrophotographic copier
US4598993A (en) * 1981-12-22 1986-07-08 Canon Kabushiki Kaisha Process unit and image formation apparatus provided with the process unit
US4598992A (en) * 1984-07-06 1986-07-08 Savin Corporation Electrophotographic copier having readily removable drum and improved drive system therefor
US5099280A (en) * 1987-10-30 1992-03-24 Mita Industrial Co., Ltd. Cleaning unit of a copying apparatus
US5142322A (en) * 1988-04-05 1992-08-25 Surti Tyrone N Electrophotographic copier process kit having support brackets for providing disassembly of internal process components
US5168308A (en) * 1989-07-29 1992-12-01 Konica Corporation Clamshell-type electrophotographic image forming apparatus
US5177542A (en) * 1991-10-07 1993-01-05 Eastman Kodak Company Method of xeroprinting
US5999771A (en) * 1998-03-19 1999-12-07 Fujitsu Limited Electrophotographic apparatus with removable photosensitive drum

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Publication number Publication date
DE1961836A1 (de) 1971-06-16
GB1337747A (en) 1973-11-21
NL7017714A (de) 1971-05-25
FR2072902A5 (de) 1971-09-24
DE1961836B2 (de) 1977-01-27
JPS4920549B1 (de) 1974-05-25
BE759792A (nl) 1971-06-03
CH526802A (de) 1972-08-15

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