CN1154497A - Device for developing electrostatic latent image - Google Patents
Device for developing electrostatic latent image Download PDFInfo
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- CN1154497A CN1154497A CN 96120518 CN96120518A CN1154497A CN 1154497 A CN1154497 A CN 1154497A CN 96120518 CN96120518 CN 96120518 CN 96120518 A CN96120518 A CN 96120518A CN 1154497 A CN1154497 A CN 1154497A
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Abstract
A device for developing an electrostatic latent image that includes a developing roller which is disposed in a developing housing, holds the developing agent on its peripheral surface, and conveys the developing agent that is held to a developing zone, a feeding roller for feeding the developing agent onto the peripheral surface of the developing roller, and seals that are disposed so as to be opposed to both ends of the developing roller from the downstream side of the developing zone to the upstream side of a developing agent-limiting zone. The device further includes seal lips that are formed in a protruding manner and which extend from one end on the side of the developing zone to an opposite end on the side of the developing agent-limiting zone. The feeding or replenishing roller is positioned so that its end surfaces are in contact with the inner end surfaces of the seals.
Description
The present invention relates to a kind of device for developing electrostatic latent image, this device is used at image forming machine, in Xerox or the laser printer, is last toner image with latent electrostatic image developing for example.
The developer that the device for developing electrostatic latent image use of extensively adopting at present is made up of a kind of last toner of composition is last toner image with the latent electrostatic image developing in the image forming machine.The device for developing electrostatic latent image of this form comprises the housing of a development usefulness, a development roller, a supply roller, a stirring apparatus and a restraint device.The housing of this development usefulness has a development chamber and a stirrer chamber.This development roller is placed in this development chamber, is used for the developer in the developer conservation zone is remained on the circumferential surface of this development roller, and the developer that is kept is delivered to the district of developing, and this developer is coated on this electrostatic latent image.This supply roller is placed in this development chamber, plays a feeder, is used for this developer is delivered to circumferential surface at this development roller of this developer conservation zone.This stirring apparatus is placed in this stirrer chamber, be used to stir by a developer send this developer that mouth is sent here to, and the developer that will stir is delivered to this development chamber.This restraint device acts on the circumferential surface of this development roller, and restriction is kept at a lip-deep developer level in developer restricted area.Develop between the district in this developer conservation zone and this in this developer restricted area.In order to prevent that this developer from infiltrating in the bearing of revolving shaft of this development roller of supporting, from the downstream in this district of developing, promptly the upstream side of downstream to this developer restricted area of the part that contacts with photosensitive material from this development roller also is provided with a sealing.Sealing contacts with the circumferential surface of two end portion of this development roller.The part of this development housing that adapts with this development district is opened wide.
Sealing has sealed lip.The end that this lip makes from the end of this development district one side towards this developer restricted area one side slopes inwardly.When this development roller rotated, the guiding of sealing lip dropped on the developer of sealing lip inner face, with the end feed of this developer towards a side of this developer restricted area.Yet, when sealing lip guiding developer, try hard to rest on the end of this developer restricted area one side towards this developer of this developer restricted area one side end feed, and be bonded on the circumferential surface of this development roller with the form of vertical fillet.As a result, many vertical narrow stripeds appear on image.
Sealing has sealed lip.This lip is to make to the outstanding mode of the end of this developer restricted area one side with the end of this development district one side only.Like this, the developer that has infiltrated in the space in the sealed lip outside of sealing can be scattered, and is bonded on the bearing of this development roller, causes this bearing working undesired.Sealing is on the end of this developer restricted area one side.In addition, this developer can be scattered from the end of this development district side.
In the device for developing electrostatic latent image of this kind form, promptly utilize the developer of forming by a kind of last toner of composition to go up in the device of toner image developing, because developer is to be added on the circumferential surface that remains on this development roller on this development roller by the voltage that will be predetermined, therefore, this developer also can be bonded on some other zone, rather than image generates on the zone.In order to prevent that this developer from infiltrating in the bearing of revolving shaft of this development roller of supporting, from the downstream in this district of developing, promptly the upstream side of downstream to this developer restricted area of the part that contacts with photosensitive material from this development roller also is provided with a plurality of sealings.These a plurality of sealings contact with the circumferential surface of two end portion of this development roller.Yet, still having a problem, the developer that promptly is bonded on the some other zone that is not image generation district rests on the sealing part, and is scattered in the housing of this development usefulness by the opening on this development district side.
First purpose of the present invention is that a kind of device for developing electrostatic latent image will be provided, this device is by making the end-acted on developer of this supply roller, and when this developer begins to become solid, by this developer is ground, can prevent that this developer from resting on the end of this developer restricted area side.When this development roller rotated, this developer was subjected to the sealed lip guiding of sealing, towards the end feed of this developer restricted area side, the part of the developer that is transferred is bonded on the supply roller.
Second purpose of the present invention is that a kind of device for developing electrostatic latent image will be provided, and this device infiltrates the space in a plurality of sealed lips outside of these a plurality of sealings by stoping this developer, can prevent that developer is scattered.These a plurality of sealings are respect to one another, are placed on two ends of this development roller.
The 3rd purpose of the present invention is that a kind of device for developing electrostatic latent image will be provided, and this device can prevent that developer is scattered to the housing of this development usefulness by the opening of this development district side.
In order to reach first purpose of the invention described above, the invention provides a kind of device for developing electrostatic latent image, this device comprises: the housing of a development usefulness, a development roller, a feeding roller and a plurality of sealing.This development roller is placed on this development with in the housing, will remain at the developer in the developer conservation zone on its circumferential surface, and the developer that is kept is delivered to the district of developing, and this developer is coated on the electrostatic latent image.This feeding roller is used for developer is delivered to circumferential surface at the development roller of developer conservation zone.These a plurality of sealings, are placed on two ends of this development roller, and have a plurality of sealed lips towards the upstream side of developer restricted area from the downstream in this district of developing toward each other.These a plurality of sealed lips are from the end of this district's side of developing, end towards this developer restricted area side, make in outstanding mode, wherein, a plurality of sealed lips of these a plurality of sealings make from the outer end of this development district side that the inner towards this developer conservation zone side tilts, and this supply roller is placed like this, even its end face contacts with the inner face of sealing.
In order to reach second purpose of the invention described above, the invention provides a kind of device for developing electrostatic latent image, this device comprises the housing of a development usefulness, a development roller, a developer restraint device and a plurality of sealing.This development roller is placed on this development with in the housing, will remain on the circumferential surface of this development roller at the developer in the developer conservation zone, and the developer that keeps is delivered to the district of developing, and this developer is coated on the electrostatic latent image.This developer restraint device is furnished with a scraper plate, is used for being limited in the developer restricted area and remains on developer level on this development roller circumferential surface.Develop between the district in this developer conservation zone and this in this developer restricted area.These a plurality of sealings toward each other, the upstream side from downstream to this developer restricted area in this district of developing is placed on two ends of this development roller, and has sealed lip.The sealing lip develops from this and distinguishes the end of the end of side to this developer restricted area side, makes in outstanding mode, and wherein, the scraper plate lower end that constitutes this developer restraint device contacts with the end face of sealing.
In order to reach the 3rd purpose of the invention described above, the invention provides a kind of device for developing electrostatic latent image, this device comprises the housing of a development usefulness, a development roller, a developer restraint device and a plurality of sealing.This development roller is placed in the housing of this development usefulness, will remain on the circumferential surface of this development roller at the developer in the developer conservation zone, and the developer that is kept is delivered to the district of developing, and developer is coated on the electrostatic latent image.This developer restraint device is used for being limited in the developer restricted area, remains on the developer level on this development roller circumferential surface.Develop between the district in this developer conservation zone and this in this developer restricted area.These a plurality of sealings toward each other, the upstream side from downstream to this developer restricted area in this district of developing is placed on two ends of this development roller, and has a plurality of sealed lips.The sealing lip develops from this and distinguishes the end of the end of side to this developer restricted area side, makes in outstanding mode.This developing apparatus also comprises the seal of a sheet.The sealing part is made by resilient material, and it is to place like this, and promptly an end of seal embeds in the open end of this development district side.This open end is on the bottom wall of the housing of this development usefulness.The other end of sealing part contacts with the circumferential surface of this development roller, and two ends of sealing part, contacts at the inner surface of Width with the sealing lip.
In order to reach the 3rd purpose of the invention described above, the present invention also provides a kind of device for developing electrostatic latent image, and this device comprises the housing of a development usefulness, a development roller, a developer restraint device and a plurality of sealing.This development roller is placed in the housing of this development usefulness, will remain on the circumferential surface of this development roller at the developer in the developer conservation zone, and the developer that is kept is delivered to the district of developing, and developer is coated on the electrostatic latent image.This developer restraint device is used for being limited in the developer restricted area, remains on the developer level on this development roller circumferential surface.Develop between the district in this developer conservation zone and this in this developer restricted area.These a plurality of sealings toward each other, the upstream side from downstream to this developer restricted area in this district of developing is placed on two ends of this development roller, and has a plurality of sealed lips.The sealing lip develops from this and distinguishes the end of the end of side to this developer restricted area side, makes in outstanding mode.This developing apparatus also comprises the seal of a sheet.The sealing part is made by resilient material, and it is to place like this, and promptly an end of seal embeds in the open end of this development district side.This open end is on the bottom wall of the housing of this development usefulness.The other end of sealing part contacts with the circumferential surface of this development roller, and two ends of sealing part are placed on the sealing lip at Width.
In order to reach the 3rd purpose of the invention described above, the present invention also provides a kind of device for developing electrostatic latent image, and this device comprises the housing of a development usefulness, a development roller, a developer restraint device and a plurality of sealing.This development roller is placed in the housing of this development usefulness, will remain on the circumferential surface of this development roller at the developer in the developer conservation zone, and the developer that is kept is delivered to the district of developing, and developer is coated on the electrostatic latent image.This developer restraint device is used for being limited in the developer restricted area, remains on the developer level on this development roller circumferential surface.Develop between the district in this developer conservation zone and this in this developer restricted area.These a plurality of sealings toward each other, the upstream side from downstream to this developer restricted area in this district of developing is placed on two ends of this development roller, and has a plurality of sealed lips.The sealing lip develops from this and distinguishes the end of the end of side to this developer restricted area side, makes in outstanding mode.This developing apparatus also comprises the seal of a sheet and the lid of a sheet.The sealing part is to place like this, and promptly an end of sealing part is packed in the open end of this development district side.This open end is on the bottom wall of the housing of this development usefulness.And the other end of sealing part contacts with this development roller.This sheet lid is to place like this, and promptly an end of this lid is packed in the open end of this development district side.This open end is on the bottom wall of the housing of this development usefulness.And the other end of this sheet lid relatively should the development roller circumferential surface keep a little gap.
Brief description of drawings
Fig. 1 is a sectional view, and it schematically shows the structure of an image forming machine, and this machine is equipped with the device for developing electrostatic latent image that constitutes according to one embodiment of present invention;
Fig. 2 is a side view, each major part of the device for developing electrostatic latent image that its expression is shown in Figure 1;
Fig. 3 is a skeleton view, and it represents to be installed in development roller in the device for developing electrostatic latent image shown in Figure 1, developer restraint device and bearing support in the mode of taking apart;
Fig. 4 is a key diagram, and it represents to be installed in the position relation between the scraper plate of this development roller on the device for developing electrostatic latent image shown in Figure 1 and this developer restraint device with magnification ratio;
Fig. 5 is the planimetric map of each major part, it with magnification ratio represent to be installed on the device for developing electrostatic latent image shown in Figure 1 the supply roller and the sealing between relation;
Fig. 6 is the skeleton view of each major part, it with magnification ratio represent to be installed in scraper plate on the device for developing electrostatic latent image shown in Figure 1, that constitute this developer restraint device and the sealing between relation;
Fig. 7 is a skeleton view, and the mode that it cuts with part represents to be installed in each major part of this developer restraint device on the button device for developing electrostatic latent image shown in Figure 1;
Fig. 8 is a sectional view, and its expression will be installed in the confined state of this developer restraint device on the device for developing electrostatic latent image shown in Figure 1;
Fig. 9 is the planimetric map that is installed in the sheet packing on the device for developing electrostatic latent image shown in Figure 1;
Figure 10 is a key diagram, and it is installed in sheet packing on the device for developing electrostatic latent image shown in Figure 1, sheet lid, the relation between development roller and the sealing with magnification ratio explanation;
Figure 11 is a skeleton view, and it represents to be installed in this sheet packing on the device for developing electrostatic latent image shown in Figure 1 and the part of relation between the sealing with magnification ratio;
Figure 12 is a skeleton view, and it is represented according to the sheet packing of another embodiment with magnification ratio and is installed in the part of the relation between the sealing on the device for developing electrostatic latent image shown in Figure 1;
Figure 13 is the planimetric map that is installed in the sheet lid on the device for developing electrostatic latent image shown in Figure 1;
Figure 14 is a front elevation, it with magnification ratio represent to be installed on the device for developing electrostatic latent image shown in Figure 1 this sheet lid and should the development roller between the part that concerns.
DETAILED DESCRIPTION OF THE PREFERRED
Now illustrate in greater detail a preferred embodiment of the device for developing electrostatic latent image that constitutes according to the present invention in conjunction with the accompanying drawings.
Fig. 1 represents an image forming machine.This machine is equipped with the device for developing electrostatic latent image that constitutes according to the present invention.Illustrated image forming machine is furnished with a rotary drum 2.Static sensitive material as image-carrier is placed on the circumferential surface of this rotary drum.Rotary drum 2 utilizes revolving shaft 21 to be installed in the machine case, and can freely rotate.This machine case does not illustrate in the drawings.Round according to the rotating rotary drum 2 of the direction of arrow 22, when when rotation direction is seen, arranging 4, one laser opticses 6 of a corona discharger, developing apparatus 8, transfer rollers 10, cleaning device 14 and electric charge are removed lamp 16.This corona discharger 4 is used for the photographic layer of this rotary drum 2 is charged to specific polarity.This laser optics 6 is an exposure device, is used for forming electrostatic latent image on the photographic layer of the rotary drum 2 that is charged to particular polarity by this corona discharger.This developing apparatus 8 is used for latent electrostatic image developing is become to go up the toner image.This electrostatic latent image is by forming from these optical devices 6 emitted laser bundles.
This device for developing electrostatic latent image 8 is equipped with the housing 30 of a development usefulness.This housing 30 can be made by synthetic resin.In the housing 30 of this development usefulness, placing 50, one stirring apparatuss 60 of 40, one supply rollers of a development roller and a developer restraint device 70.A colouring agent box 100 is installed, as the container of depositing developer on the housing 30 of this development usefulness.
The housing 30 of this development usefulness is made by synthetic resin, and is made of 31, two sidewalls 32 of a bottom wall and 33 (see figure 2)s and a top wall 34.This development has a development chamber 35 and a stirrer chamber 36 with housing 30.This development also is provided with an opening 37 with housing 30.This opening 37 is done between this bottom wall 31 and this top wall 34, at the upper right side of Fig. 1.Colouring agent box 100 is installed on this opening 37.In addition, promptly relative with this rotary drum 2, the end of this development district side is made an opening 38 at this left end with housing 30 of developing.
This development roller 40 is placed on this development with in the development chamber 35 of housing 30, and comprises a revolving shaft 41 and a solid synthetic rubber roller 42.This revolving shaft 41 is bearing in this development rotationally with between two sidewall (not shown)s of housing 30.This solid synthetic rubber roller 42 is contained on the external peripheral surface of this revolving shaft 41.This revolving shaft 41 can be made by the proper metal material, for example stainless steel.This solid synthetic rubber roller 42 is for example urinated gastral cavity rubber and is made by the solid synthetic rubber of softer material with electric conductivity or conduction.In the illustrated embodiment, the roughness of the circumferential surface of this solid synthetic rubber roller 42, promptly ten some mean roughness Rz as JIS B0601 regulation are 5.0～12.0.The specific insulation of this solid synthetic rubber roller 42 is about 10
6～10
9Ohmcm (Ω cm).In this development roller 40, the external diameter of revolving shaft 41 for example is 8～10 millimeters, and the external diameter of then solid synthetic rubber roller 42 for example, is 16 millimeters.This development roller 40 is to be made of the solid synthetic rubber roller 42 on metal material revolving shaft of making 41 and the external peripheral surface that is contained in this revolving shaft 41.Therefore, when the external diameter of revolving shaft 41 was 8 millimeters, this solid synthetic rubber roller 42 was 4 millimeters at the thickness of radial direction.And when the external diameter of revolving shaft 41 was 10 millimeters, this solid synthetic rubber roller 42 was 3 millimeters at the thickness of radial direction.Like this, when the rubber that constitutes synthetic rubber roller 42 had identical hardness, this development roller changed as the hardness of an assembly.That is to say that adopting external diameter is that to adopt external diameter be that 10 millimeters the hardness of development roller of revolving shaft is little for the hardness ratio of development roller of 8 millimeters revolving shaft.In the illustrated embodiment, this development roller as the hardness of an assembly, is considered according to A Sike (Asker) C hardness, is 60～80.This development roller is to be made of revolving shaft 41 and the solid synthetic rubber roller 42 that is contained on the external peripheral surface of this revolving shaft 41.The solid rubber roller 42 of the development roller 40 of Gou Chenging develops with the exposure of the opening on the housing 30 at this by work like this, and is placed on the opposite of this rotary drum 2.The circumferential surface that constitutes the roller 42 of this development roller 40 compresses with the circumferential surface of this rotary drum 2 and contacts.And at this compression contact area, the circumferential surface of this roller 42 is a little by elastic compression.Drive unit drives the revolving shaft 41 of this development roller 40, rotates continuously according to Fig. 1 arrow 401 indicated directions.This drive unit does not illustrate.When this revolving shaft 41 rotated, roller 42 also rotated continuously according to the direction of arrow 401.The circumferential surface of roller 42 is successively by developer conservation zone 402, and developer restricted area 403 and development distinguish 404.In the illustrated embodiment, on the revolving shaft 41 of development roller 40, be added with 300 volts fixed voltage.Two ends of the revolving shaft 41 of this development roller 40 are rotated by bearing support 80 and 80 supportings, and with developer restraint device 70, are installed in this development with in the housing 30 as a single structure, and this developer restraint device 70 will be explained below.The back will describe this development roller 40, developer restraint device 70 and the bearing support of forming as a single structure 80,80 in detail.
Stirring apparatus 60 is placed on this development with in the stirrer chamber 36 of housing 30, and is parallel with supply roller 52, and comprises 61, one stirrer parts 62 of a revolving shaft and a flexible stirrer flat parts 63.This revolving shaft 61 is bearing in rotationally and develops with between two sidewall (not shown)s of housing 30.This stirrer part 62 is contained on this revolving shaft 61.This flexible stirrer flat parts 63 is installed on this stirrer part 62.This stirrer part 62 is made by synthetic resin, and at its Width many openings is arranged.This stirrer flat parts 63 for example, is made by tygon terephthalate (PETP) resin, has an opening in an one end portion.This opening adapts with the opening of doing on this stirrer part 62.These flat parts 63 usefulness cementing agents are fixed on this stirrer part 62.The other end of this stirrer flat parts 63 is given prominence to outside this stirrer part 62.The stirring apparatus 60 of Gou Chenging is driven by a drive unit and rotates continuously according to the direction of Fig. 1 arrow 601 like this.This drive unit does not illustrate.
This supporting chuck 76 can be made by a for example aluminium alloy extruded mold pressing.This supporting chuck 76 adapts with the distance between two sidewalls 32,33 of housing 30 in length and this development of Width, and comprises 761, one lower wall surfaces 762 of a upper wall surface and a rear surface 763.This upper wall surface 761 is used to install the upper end of this support plate 72.This lower wall surface 762 makes from 761 1 distances that are predetermined of this upper wall surface.This rear surface 763 is connected the rear end of upper wall surface 761 with lower wall surface 762.A guide rail 764 is arranged on the center section of upper wall surface 761, and it is inwardly outstanding, and extends on whole Width.Between the guide rail 764 of this upper wall surface 761 and rear surface 763, form many pin patchholes (being 35 holes in the illustrated embodiment).Make a gathering sill 766 on lower wall surface 762, the surface of position of this groove is facing to this guide rail 764.This gathering sill 766 extends on whole Width.On the front end surface of this upper wall surface 761, make to have many threaded holes 767 (being 5 holes in the illustrated embodiment) (see figure 3).The supporting chuck 76 of Gou Chenging scraper plate 71 with the following mode clamping that will illustrate like this, support plate 72 and elasticity ejector apparatus 73.To constitute this developer restraint device 70.This developer restraint device 70 is installed in this development with in the housing 30 with development roller 40 as a single structure.The back will describe this development roller 40 and this developer restraint device 70 that makes a single structure in detail.
In the illustrated embodiment, support plate 72 can be with a planar spring spare, and for example Bao steel spring plate or thin stainless steel are made, and its almost the length with this scraper plate 71 is identical in the length of Width.Support plate 72 must have flexible, therefore, wishes that used thickness is about 0.1 millimeter steel plate.As shown in Figure 3, support plate 72 has many slotted eyes 721 (being 5 holes in the illustrated embodiment).These holes are done to separate a predetermined distance in the upper part of this support plate 72 at Width.Slotted eye 721 adapts with many threaded holes 767 (being 5 holes in the illustrated embodiment).These many threaded holes 767 are to do on the front end surface of the upper wall surface 761 that supports chuck 76.In addition, do in locating notch 722 and 722, as locating device in two upper side edge ends of support plate 72.The rear surface of the support plate 72 of Gou Chenging utilizes stationary installation like this, and for example cementing agent is fixed on another surface of this scraper plate 71.When hope is added to desired voltage on the scraper plate 71, when controlling the charged characteristic of toner, the cementing agent that can use conduction is as stationary installation.Therefore, can desired voltage be added on the scraper plate 71 by this support plate 72.As mentioned above, support plate 72 utilizes screw 78 fixing and supportings.The upper end of this support plate is fixed on another surface of scraper plate 71.These a plurality of screws 78 are screwed in the threaded hole 767 by a cover plate 77 and 721.Threaded hole 767 is done on the front end surface of the upper wall surface 761 that constitutes this supporting chuck 76.
Almost the length with scraper plate 71 is the same in the length of Width for ejector 74, and its shape resembles a cap.On the xsect of cap, the rear end is open.This ejector 74 is made of 742, one lower wall surfaces 743 of 741, one upper wall surfaces of a front face and guided bearing part 744 and 745.This wall 741 is relative with support plate 72, and this guided bearing part 744 and 745 is extended up and down from the rear end of upper wall surface 742 and lower wall surface 743 respectively.Outshot (outshot of lengthening) 746 is done on the front surface of front face 741, forms the ejection part of an above-below direction therebetween on Bu Fen whole width.In addition, between upper wall surface 742 and lower wall surface 743,, form many spring installation cavitys (being 6 chambeies in the illustrated embodiment) by separating the wall 747 and 748 of on Width, making with the distance that equates.Compression coil spring 731 is installed in each chamber.This compression coil spring 731 just constitutes elasticity ejector apparatus 73.For example, utilize synthetic resin ejector 74 mold pressings that constitute like this can be made a single structure.Importantly, this ejector 74 should have flexible.
This elasticity ejector 73 comprises many compression coil springs 731 (being 6 compression coil springs in the illustrated embodiment).The end of this compression coil spring one side is contained in many spring installation cavitys, and the end of this spring opposite side contacts with the front surface of the rear surface 763 that constitutes supporting chuck 76.These many spring installation cavitys are done on this ejector 74.When adopting said structure,, act on the scraper plate 71 by this ejector 74 and support plate 72 in the thrust of ejector 74 Widths with many compression coil springs 731 of equidistantly distributing.Like this, the surface pressure close contact of scraper plate 71 and surface and the roller 42 that constitutes the development roller.Because this ejector 74, support plate 72 and scraper plate 71 have flexible, and therefore, even the skew a little of the axle of development roller 40, a surface of scraper plate 71 also can be on whole width, equably with the surface pressure close contact of the roller 42 that constitutes development roller 40.The support plate 72 that is contained on the scraper plate 71 by jut 746 ejections, and on whole width, stably bears uniform ejection force, because jut 746 is little with the contact area of support plate 72.This jut 746 is done on the front surface of the front face 741 that constitutes ejector 74.The snap-in force that acts on the scraper plate 71 on the circumferential surface of the roller 42 that constitutes development roller 40 can suitably be set according to the thickness of developer layer.This developer layer is to form on the circumferential surface of roller 42.Along with the increase of snap-in force, the thickness of the developer layer that forms on roller 42 circumferential surfaces reduces.On the other hand, when snap-in force was excessive, the smooth rotation of roller 42 may be destroyed.In the toning system of illustrated embodiment, generally the thickness of colorant layer is approximately 20～35 microns (μ m) on forming on the circumferential surface of roller 42.In order suitably to form the developer layer with this thickness, scraper plate 71 should compress with the circumferential surface of roller 42 with the linear pressure (pressure of unit length on the Width) of 4.0～12.0 gram/millimeters (g/mm) and contact.
The following describes the linkage editor of this developer restraint device 70.When assembling developer restraint device 70, at first the end with compression coil spring 731 is contained in the spring installation cavity 749 of ejector 74, as shown in Figure 7.In this spring of compression, with the end of compression coil spring 731, towards the other end insertion of this chuck 76 from supporting chuck 76.At this moment, the guided bearing part 744 of the upper end of ejector 74 is between rear surface 763 and the guide rail 764, and the guided bearing part 745 in the lower end is arranged in gathering sill 766, like this, just ejector 74 can be inserted in the preposition of this supporting chuck 76, to form elasticity ejector apparatus 73.In the time of on elasticity ejector apparatus 73 being installed in supporting chuck 76, overcome the power of compression coil spring 731 as mentioned above, the front face 741 of this ejector 74 is pushed away towards rear surface 763, the result, guided bearing part 744 towards rear surface 763, moves to outside this pin patchhole 765.When this state, backing pin 79 is inserted in the pin patchhole 765, and as shown in Figure 7, thereby backing pin 79 acts on the front surface of the guided bearing part 764 that constitutes ejector 74, can limit travelling forward of this ejector 74.Like this, the thrust of compression coil spring 731 no longer acts on the back side of support plate 72.Be assembled into thrust and be cancelled the developer restraint device 70 of state and development roller 40 together, be installed in as a single structure in the housing 30 of this development usefulness.
Illustrate how development roller 40 and developer restraint device 70 are assembled into a single structure below with reference to Fig. 3.For according to the present invention, development roller 40 and developer restraint device 70 are assembled into a single structure, used two bearing supports 80 and 80.On this bearing support 80 and 80 bearing 81 and 81 are installed, ball bearing for example is in order to the revolving shaft 41 that supports this development roller 40 rotationally.On the part of the circumference of bearing 81 and 81, on the inner surface of bearing support 80 and 80, promptly the upstream side from downstream to the developer restricted area 403 in the district 404 of developing is provided with sealing mounting portion 82 and 82.On sealing mounting portion 82 and 82, sealing 90 and 90 is installed.Sealing is placed on two ends of the roller 42 that constitutes development roller 40 toward each other.Each sealing 90 and 90 that is installed on the sealing mounting portion 82 and 82 has 91, one sealed lips 92 of a seal and an outer side surface 93.Sealing lip 92 is done on seal 91 and upper surface, developer restricted area 403 1 sides from district's 404 1 side direction of developing, and slopes inwardly.This outer side surface 93 is erected at the outer end of seal 91.The sealed lip 92 of work on seal 91 upper surfaces makes from development and distinguishes the inner inclination of the outer end of a side towards developer restricted area one side.Sealed lip 92 is to constitute like this, and promptly the end of developer restricted area 403 1 sides is placed on the inner face of the inner face of seal 91.Under the revolving shaft 41 of development roller 40 was installed in state on bearing 81 and 81, the two ends of roller 42 were to place like this, i.e. compression seal 90 and 90 sealed lip 92 and 92 slightly.Therefore, when development roller 40 rotated, the developer that rests on the seal 91 and 91 that is positioned at sealed lip 92 and 92 inboards was inside by sealed lip 92 and 92 guiding, and is delivered to developer restricted area 403 1 sides.On the upper inner lateral surface of bearing support 80 and 80, be provided with locator protrusions part 83 and 83.This jut 83 and 83 plays the locating device effect, with locating notch 722 and 722 engagements done on support plate 72.Three screw insertion holes 84,85 and 86 are done respectively on the top of bearing support 80 and 80, and make to have a threaded hole 87 in the bottom of bearing support 80 and 80.Three threaded hole 768a, 768b and 768c do on two end portion of the supporting chuck 76 that constitutes developer restraint device 70.Notched recessed part 88 and 88 are done to have in bottom in bearing support 80 and 80, be used for preventing when the parts with developer restraint device 70 and development roller 40 are installed in the housing 30 of development usefulness, interfere with the revolving shaft 51 that is installed in the supply roller 50 on the usefulness housing 30 that develops.On the outside surface of bearing 81, do to have support projection part 89 and 89.These juts have the hole, and revolving shaft 41 is inserted in this hole.
After the revolving shaft 41 with development roller 40 inserts in the bearing 81 and 81 of two bearing supports 80 constituting like this and 80, the supporting chuck 76 of the developer restraint device 70 that assembles as described above can be installed, but except support plate 72 and the scraper plate 71.For mounting support chuck 76, with three threaded hole 768a, 768b and 768c are placed on and three positions that screw insertion hole 84,86 is relative with 86, and screw 841 is inserted in the screw insertion hole 84 from the outside of bearing support 80,80, and are screwed among the threaded hole 768a.These three threaded hole 768a, 768b and 768c make two ends at supporting chuck 76.These three screw insertion holes 84,85 and 86 are done in bearing support 80 and 80.This threaded hole 768a does in supporting chuck 76.Then, as shown in Figure 4, locating notch 722 and 722 engages with locator protrusions part 83 and 83.This locating notch 722 and 722 is done at the two ends of support plate 72, and this support plate 72 is fixed on another surface of scraper plate 71.This locator protrusions part 83 and 83 is done on bearing support 80 and 80.Then, as shown in Figure 1, utilize screw 78 that the upper end of support plate 72 is fixed with the front end surface of the upper wall surface 761 that constitutes supporting chuck 76.This screw 78 is by cover plate 77 and hole 721 and threaded hole 767 engagements.As mentioned above, by development roller 40 and developer restraint device 70 are installed on two bearing supports 80 and 80, they can be constituted a single structure.Support plate 72 has locating notch 722 and 722.This support plate 72 is fixed on the scraper plate 71 and another surface of developer restraint device 70, and it forms a single structure with development roller 40.These two locating notches 722 and 722 two ends of doing at support plate 72, and with locator protrusions part 83 and 83 engagements done on bearing support 80 and 80, by control bearing 81,81 and locator protrusions part 83, position relation between 83, can adjust the circumferential surface of this scraper plate 71, the overhang (S) of scraper plate 71 from the contact center to these development roller 40 lower ends with respect to development roller 40.These two bearings 81,81 are installed on the bearing support 80,80.This locator protrusions part 83,83 is done on bearing support 80,80.For example, the projection amount of scraper plate 71 (S) can be set to 0.5～2.0 millimeter.When overhang (S) during less than 0.5 millimeter, the restriction of scraper plate 71 is too big, so that the developer layer that can not form.On the other hand, when overhang (S) during greater than 2.0 millimeters, the thickness of developer layer increases excessive.
Referring now to Fig. 5 illustrate the sealing 90 and supply roller 50 between relation.The end face that constitutes the roller 52 of supply roller 50 contacts with the inner face of the seal 91 that constitutes sealing 90.Therefore, when development roller 40 rotated, developer was directed inwardly along the inboard of sealed lip 92.And be delivered to developer restricted area 402 1 sides, and in carrying the way, developer is subjected to constituting roller 52 end-acted of supply roller 50.Like this, developer partly is bonded on the supply roller.The developer that begins to become solid is ground.Therefore, in developer restricted area one side, can prevent that developer from resting on the end of sealing
Then, with reference to Fig. 4 and Fig. 6 scraper plate 71 is described and seals relation between 90.The lower end of scraper plate 71 contacts at the end face of developer restricted area 403 1 sides with sealing 90.The lower end of scraper plate 71 also with seal 91, sealed lip 92 contacts with the end face of outer side surface 93.Therefore, can prevent the developer in development chamber 35, infiltrate by seal 91, in the space that sealed lip 92 and outer side surface 93 are formed from the end of developer restricted area 403 1 sides.
The development roller 40 that assembles up like this and the parts of developer restraint device 70 are installed in the usefulness housing 30 that develops from opening 38 1 sides of development with housing 30, and in this case, support projection part 89 and 89 is packed in notched recessed part 321 and 331.These two support projection parts 89 and 89 are done on the outside surface of bearing support 80 and 80.These two notched recessed parts 321 and 331 are done on two sidewalls 32 and 33 that develop with housing 30.Being installed in revolving shaft 51 loose grounds that develop with the supply roller 50 on the housing 30 cooperates with notched recessed part 88 and 88.This recessed part 88 and 88 is done in bearing support 80 and 80.Like this, development roller 40, the parts of developer restraint device 70 and bearing support 80 and 80 are installed on the position that is predetermined of developing with housing 30.Then, screw 851 and 861 is inserted the screw insertion hole of doing on bearing support 80 85 and 86 with two walls 32 of housing 30 and 33 the outside from constitute developing, and be screwed among threaded hole 768b and the 768c, like this, supporting chuck 76 and bearing support 80,80 are fixed on to constitute and develop with on the sidewall 32 and 33 of housing 30.This threaded hole 768b and 768c do the two ends at the supporting chuck 76 that constitutes developer restraint device 70.In addition, for bearing support 80 and 80 being fixed on two sidewalls 32 and 33 that develop with housing 30, screw 871 and 871 is screwed in screw hole 87 and 87 with two walls 32 of housing 30 and 33 the outside from developing, and this screw hole 87 and 87 works are in bearing support 80 and 80.When as previously mentioned, the parts of development roller 40 and developer restraint device 70 are installed in when developing with the position that is predetermined in the housing 30, backing pin 79 is extracted from pin patchhole 765, thereby ejector 74 is travelled forward, promptly move, and compression spring 731 will be done in 746 ejections of the jut on the front surface of ejector 74 on the back side of support plate 72 towards support plate 72.As mentioned above, because the developer restraint device 70 according to illustrated embodiment is assembled into a kind of like this state, the thrust that promptly acts on support plate 72 back sides is cancelled, therefore, in the time of in developer restraint device 70 being installed in the usefulness housing 30 that develops, the circumferential surface of development roller 40 can not damaged by scraper plate 71.Scraper plate 71 is installed on the support plate 72.
In the device for developing electrostatic latent image according to illustrated embodiment, the seal 110 of a sheet is placed on the end of development with the opening 38 of development district one side in the housing 30.This sheet packing 110 is made by rubber-like sheet material spare, tygon terephthalate (PETP) resin for example, and as shown in Figure 9, shorter than the length of roller 42 axial directions that constitute development roller 40 a little in the length of Width.One end of sheet packing 110 makes a mounting portion 111.This mounting portion 111 is by stationary installation, and for example cementing agent is fixed on the sealing mounting portion 381.This mounting portion 381 is done at the end (see Figure 10 and 11) of development with the opening 38 of development district one side in the housing 30.Shown in Figure 10 and 11, the other end of this sheet packing 110 is crooked, and with the circumferential surface Elastic Contact of the roller 42 that constitutes development roller 40.This sheet packing 110 is installed on the end of development with the opening 38 of development district one side in the housing 30.The two ends of this sheet packing 110 are placed in the sealing 90 and 90, and contact with 92 inner surface with the sealed lip of doing in sealing 90 and 90 92, as shown in figure 11.Therefore,, can prevent to rest on the developer on the seal of sealing 90 and 90, by hanging down with the opening 38 on development district one side in the housing 30 developing by the effect of this sheet packing 110.
Another embodiment of this sheet packing 110 is described referring now to Figure 12.Almost the length with roller 42 axial directions that constitute development roller 40 is identical according to the width of the sheet packing 110 of this embodiment, and has two ends.These two ends are placed on the sealed lip 92 and 92 of sealing 90 and 90, as shown in figure 12.This can prevent reliably that developer from hanging down between the inner surface of the two ends of this sheet packing 110 and sealing lip 92 and 92.
In the device for developing electrostatic latent image according to illustrated embodiment, sheet lid 120 is placed on the end of development with the opening 38 of development district one side in the housing 30.Sheet lid 120 is made by rubber-like sheet material spare, for example tygon terephthalate (PETP) resin.As shown in figure 13, this sheet lid 120 has mounting portion 121,122 and 122.This mounting portion 121,122 and 122 is done on end portion of sheet lid 120 and two lateral parts.The width of sheet lid 120 adapts with constituting the length of developing with between the outside surface of two sidewalls 32 of housing 30 and 32, and the length of work between the mounting portion 122 and 122 on two lateral parts almost the axial direction length with the roller 42 of formation development roller 40 is identical.Shown in Figure 10 and 14, the sheet lid 120 that constitutes like this has mounting portion 121 and has mounting portion 122 and 122.This mounting portion 121 utilizes stationary installation, and for example cementing agent is fixed on the end face mounting portion 382 of the bottom wall 31 that constituting develops uses housing 30.And mounting portion 122 and 122, by stationary installation, for example cementing agent is fixed on the end face of the end face of two sidewalls 32 and 33 and bearing support 80 and 80.As shown in figure 14, an other end of this sheet lid 120 keeps a little gap with respect to the circumferential surface of the roller 42 that constitutes development roller 40.This sheet lid 120 is installed on the end of development with the opening 38 of development district one side of housing 30.Therefore, the developer that is bonded on roller 42 circumferential surfaces that constitute development roller 40 can not hang down.Even work as because sheet lid 120 is being installed in the process of development with the open end of development district one side of housing 30, this sheet packing 110 is scattered the cementing agent that is glued on roller 42 circumferential surfaces that constitute development roller 40 a little and comes, this developer of coming of being scattered is limited in the space between this sheet lid 120 and the sheet packing 110, can prevent from that this developer is scattering into to develop to go with housing 30 outsides.
According to the formation of the device for developing electrostatic latent image of illustrated embodiment as mentioned above.The operation of this developing apparatus is described below.When starting this device for developing electrostatic latent image work, drive unit drives roller 42, the roller 52 of supply roller 50 and stirring apparatus 60 revolutions of development roller 40 according to the arrow indicated direction.This drive unit does not illustrate.When according to arrow 601 indicated direction rotating stirring devices 60, the developer that is contained in the stirrer chamber 32 is stirred and delivers in the development chamber 31.Simultaneously, on the circumferential surface that developer is remained on the roller 42 that constitutes development roller 40, and by after the district 404 of developing, with the developer of crossing, contact with each other at development roller 40 and supply roller 50, and the part place that is mixed of the developer of in development chamber 31, sending here with stirring apparatus 60, be transferred on the surface of this supply roller 50.The developer that mixes in development chamber 31 remains on the circumferential surface of roller 52.This roller 52 is made by foamed material, and constitutes supply roller 50, and transmits towards development roller 40.
Remain on the circumferential surface of supply roller 50, and the developer replenishing of carrying towards development roller 40 extremely, and remain on the circumferential surface of roller 42, but also 403 transmit towards the developer restricted area.This roller 42 is 402 formation development rollers 40 in the developer conservation zone.In developer restricted area 403, the scraper plate 71 of developer restraint device 70 acts on the developer, and the developer that will remain on the circumferential surface of roller 42 is limited to an amount that is predetermined, so that form a thin layer.This developer is to remain on the circumferential surface of roller 42 of development roller 40.Here, because scraper plate 71, support plate 72 and ejector 74 have flexible, therefore, even the axle of development roller 40 deflection a little, a surface of scraper plate 71 can be on whole width equably with the roller 42 surface pressure close contact of development roller 40.
In the district 404 of developing, developer is painted on the electrostatic latent image, and like this, electrostatic latent image can develop to the toner image.This electrostatic latent image is on the static sensitive material.This static sensitive material then is placed on the circumferential surface of rotary drum 2.For example, electrostatic latent image has a non-image district and an image area.This non-image district charges to approximately+600 volt, and this image area charges to about 120 volts.Last toner just is bonded in (what is called is oppositely developed) in the image area.Should go up toner is exactly developer.Rotary drum 2 rotates continuously according to the direction of Fig. 1 arrow 22 indications, and therefore, in the district 404 of developing, the circumferential surface of the roller 42 of the circumferential surface of rotary drum 2 and formation development roller 40 moves according to same direction.The movement velocity V2 of the circumferential surface of roller 42 sets greatlyyer a little than the movement velocity V1 of the circumferential surface of rotary drum 2.Preferably the pass between V1 and the V2 is 1.2V1≤V2≤2.2V1.In this case, the roller 42 of development roller 40 is delivered to the district 404 of developing with the developer of q.s.Circumferential surface by roller 42 can suitably be peeled off the developer that is bonded in the non-image district of electrostatic latent image for the rubbing action of the circumferential surface of rotary drum 2.Like this, can obtain a good last toner image.Should go up the toner image has suitable development density and does not have fuzzy place.Wish, developer includes only a kind of toner of going up, the volume averaging particle diameter (50% volume: upward size equals the last toner volume of size greater than the volume averaging particle diameter less than the last toner volume of volume averaging particle diameter) that should go up toner is about 8.0～12.0 microns (μ m), and specific insulation is not less than 10
8Ohmcm (Ω cm).
As mentioned above, in device for developing electrostatic latent image according to the present invention, the sealed lip of sealing makes from the outer end of district's one side of developing, and towards the inner inclination of developer restricted area one side, and the end face of supply roller contacts with the inner face of sealing.The sealed lip of sealing is placed to the two ends of development roller.Therefore, along with the rotation of development roller, developer inwardly is directed along the inboard of sealed lip, and is sent to developer restricted area one side.In transmitting road, this developer is subjected to the effect of supply roller end face, and a part of developer is bonded on this supply roller.The developer that begins to become solid is ground.Like this, can prevent that developer from resting on the end of developer restricted area.Thereby, can prevent that developer from resting on the hermetic terminal of developer restricted area one side, and further prevent to be bonded on the circumferential surface of development roller with the form of vertical narrow strip.
In addition, in device for developing electrostatic latent image according to the present invention, the scraper plate lower end of formation developer restraint device contacts with the seal face on one side of developer restricted area.Sealing with sealed lip is placed on the two ends of development roller toward each other, and from the end of district's one side of developing, outstanding to the end of developer restricted area one side.Therefore, can prevent that developer from entering work the space in the sealed lip outside from the end of developer restricted area one side.Thereby, can prevent that developer from entering work in the space in the sealed lip outside, prevent to be bonded on the bearing of development roller and prevent to disseminate away from the end of district's one side of developing.
In addition, in device for developing electrostatic latent image according to the present invention, prepared a sheet packing of making by resilient material.This sheet packing is to place like this, and promptly the one end is contained in the open end of district's one side of developing, and the other end contacts with the circumferential surface of development roller, and at its two ends, contacts with the inner surface of sealed lip on Width.This open end of developing district's one side is done developing with on the bottom wall of housing.Therefore,, can prevent to rest on the developer on the hermetic unit, be scattered away by the opening of development with development district one side in the housing by the effect of sheet packing
In addition, according to the present invention, prepared a sheet packing made from resilient material.The sealing part is placed like this, and promptly the one end is contained in the open end of district's one side of developing, and the other end contacts with the circumferential surface of development roller, and at its two ends, is being placed on the Width on the sealing sealed lip.The open end of this district's one side of developing is being developed with on the bottom wall of housing.Therefore, effect by sheet packing, can prevent to rest on developer on the hermetic unit by hanging down at the opening that develops with development district one side in the housing, can also prevent reliably developer by sealed lip inner surface and two ends of sheet packing between hang down.
According to the present invention, a sheet packing and a sheet lid have been prepared.This sheet packing is placed like this, and promptly the one end is placed in the open end of district's one side of developing, and this open end is being developed with on the lip wall of housing, and the other end contacts with the development roller.This sheet lid placement like this, promptly the one end is contained in the open end of district's one side of developing, and this open end is being developed with on the bottom wall of housing, and its other end is with respect to little gap of circumferential surface maintenance of development roller.Even will be bonded in developer on the development roller circumferential surface when scraping off a little when this sheet packing, the developer that is scraped is limited in the space between this sheet lid and the sheet packing, can prevent from that developer is scattering into to develop to go with outside the housing.
Claims (5)
1. device for developing electrostatic latent image, it comprises the housing of a development usefulness, a development roller, feeding roller and sealing; This development roller is placed on described development with in the housing, will remain on the circumferential surface of development roller at the developer in the developer conservation zone, and the developer that is kept is delivered to the district of developing, so that developer is coated on the electrostatic latent image; This feeding roller is used for developer is delivered to the circumferential surface of the described development roller of developer conservation zone; Sealing is placed on two ends of the development roller of downstream to the developer restricted area upstream side of distinguishing from developing, and has sealed lip toward each other; The sealing lip makes from the end of district's one side of developing outstanding to the end of developer restricted area one side; Wherein, the sealed lip of described sealing makes from the inboard inclination of outer end to developer conservation zone one side of district's one side of developing; And described supply roller is placed like this, and promptly its end face contacts with the inner face of described sealing.
2. device for developing electrostatic latent image, it comprises the housing of a development usefulness, a development roller, developer restraint device and sealing; This development roller is placed on described development with in the housing, the developer in the developer conservation zone is remained on the circumferential surface of development roller, and the developer that is kept is delivered to the district of developing, so that developer is coated on the electrostatic latent image; This developer restraint device is equipped with a scraper plate, is used to limit the developer level that remains on the described development roller circumferential surface, and this development roller is in the developer restricted area, and this developer restricted area is between developer conservation zone and development district; Sealing toward each other, downstream to the developer restricted area upstream side from the district of developing is placed on two ends of described development roller, and has sealed lip; The sealing lip makes from the end of district's one side of developing outstanding to the end of developer restricted area one side; Wherein, the lower end that constitutes the scraper plate of described developer restraint device contacts with the end face of described sealing.
3. device for developing electrostatic latent image, it comprises the housing of a development usefulness, a development roller, developer restraint device and sealing; This development roller is placed on described development with in the housing, the developer in the developer conservation zone is remained on the circumferential surface of development roller, and the developer that is kept is delivered to the district of developing, so that developer is coated on the electrostatic latent image; This developer restraint device is used to limit the developer level that remains on the described development roller circumferential surface, and this development roller is in the developer restricted area, and this developer restricted area is between developer conservation zone and development district; Sealing toward each other, downstream to the developer restricted area upstream side from the district of developing is placed on two ends of described development roller, and has sealed lip; The sealing lip makes from the end of district's one side of developing outstanding to the end of developer restricted area one side; Wherein, a sheet packing of being made by resilient material is provided, the sealing part is placed like this, be that the one end is contained in the open end of district's one side of developing, this open end is used on the bottom wall of housing in described development, and its other end contacts with the circumferential surface of described development roller, and its two ends contact with the inner surface of described sealed lip on Width.
4. device for developing electrostatic latent image, it comprises the housing of a development usefulness, a development roller, developer restraint device and sealing; This development roller is placed on described development with in the housing, the developer in the developer conservation zone is remained on the circumferential surface of development roller, and the developer that is kept is delivered to the district of developing, so that developer is coated on the electrostatic latent image; This developer restraint device is used to limit the developer level that remains on the described development roller circumferential surface, and this development roller is in the developer restricted area, and this developer restricted area is between developer conservation zone and development district; Sealing toward each other, downstream to the developer restricted area upstream side from the district of developing is placed on two ends of described development roller, and has sealed lip; The sealing lip makes from the end of district's one side of developing outstanding to the end of developer restricted area one side; Wherein, a kind of sheet packing of being made by resilient material is provided, the sealing part is placed like this, be that the one end is contained in the open end of district's one side of developing, this open end is being developed with on the bottom wall of housing, its other end contacts with the circumferential surface of development roller, and its two ends are being placed on the sealed lip on the Width.
5 one kinds of device for developing electrostatic latent image, it comprises the housing of a development usefulness, a development roller, developer restraint device and sealing; This development roller is placed on described development with in the housing, the developer in the developer conservation zone is remained on the circumferential surface of development roller, and the developer that is kept is delivered to the district of developing, so that developer is coated on the electrostatic latent image; This developer restraint device is used to limit the developer level that remains on the described development roller circumferential surface, and this development roller is in the developer restricted area, and this developer restricted area is between developer conservation zone and development district; Sealing toward each other, downstream to the developer restricted area upstream side from the district of developing is placed on two ends of described development roller, and has sealed lip; The sealing lip makes from the end of district's one side of developing outstanding to the end of developer restricted area one side; Wherein, provide a sheet packing and a sheet lid, this sheet packing is placed like this, and promptly the one end is contained in the open end of district's one side of developing, and this open end is being developed with on the bottom wall of housing, and its other end contacts with the development roller; This sheet lid is placed like this, and promptly the one end is contained in the open end of district's one side of developing, and this open end is being developed with on the bottom wall of housing, and develop the relatively circumferential surface of roller of its other end keeps a little gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96120518 CN1154497A (en) | 1995-11-10 | 1996-11-08 | Device for developing electrostatic latent image |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP317190/95 | 1995-11-10 | ||
| JP317191/95 | 1995-11-10 | ||
| JP317193/95 | 1995-11-10 | ||
| CN 96120518 CN1154497A (en) | 1995-11-10 | 1996-11-08 | Device for developing electrostatic latent image |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1154497A true CN1154497A (en) | 1997-07-16 |
Family
ID=5126389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96120518 Pending CN1154497A (en) | 1995-11-10 | 1996-11-08 | Device for developing electrostatic latent image |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1154497A (en) |
-
1996
- 1996-11-08 CN CN 96120518 patent/CN1154497A/en active Pending
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