MXPA98008636A - Process cartridge all in one that includes a photographer and procedure components that have regions that act on the quality of the image, relatively criti - Google Patents

Abstract

The present invention relates to a process cartridge that includes a housing having walls defining a process chamber and a photoreceptor mounted to the walls within the process chamber having a closed circuit path or path and an area for forming a images that have a given length. The process cartridge also includes a plurality of process components that act along the path or path of the closed circuit to produce the effects of imaging on the photoreceptor to form on, and to transfer from the photoreceptor an image of organic pigment . The process components include a load component that includes a load-skipping device with a pin array that has a region that acts precisely only along the length of the imaging area, to prevent "dark bands" from occurring. the edges of an organic pigment image formed and transferred. The process components also include a developer roller to apply charged organic pigment particles to the imaging area. The developer roller has a region that tapers centered in relation to, and extending slightly beyond, each end of the length of the imaging area. Importantly, the process components include a cleaning component that includes a cleaning blade to remove organic waste pigment from the imaging area, and an endless conveyor for transporting the organic waste pigment in a pigment flow direction waste organic. The cleaning blade has a region that acts slightly beyond the length of the imaging area, and is spaced in relation to the imaging area in the flow direction of the organic waste pigment, thereby allowing the process cartridge reliably and effectively produce the transfer of high-quality organic pigment images

Description

PROCESS CARTRIDGE ALL IN ONE THAT INCLUDES A PHOTOGRAPHER AND PROCEDURAL COMPONENTS THAT HAVE REGIONS THAT ACT ON THE QUALITY OF THE IMAGE, RELATIVELY CRITICAL RELATED REQUESTS Cross reference is made to the following applications filed at the same time as the present one: x File number of Attorney D / 97267 entitled "Corotrón 3 Bolt Load with Optimal Dimensions for a Very High Ozone Production "by Dhirendra C. Damj et al.

Attorney File D / 97268 entitled '"Connector De Deflection Deviation With Integrated Bearing Bracket "by Dhirendra C. Damji et al., Attorney File Number D / 97329 entitled '' Bolt Load Corotron Module For Use With A Print Cartridge "by Ajay Kumar et al.

'. , Proxy File Number D / 97329Q1 entitled Charging Device That Has a Corotron with Connector Integrated Electric "by Ajay Kumar et al., Number of Attorney File D / 97329Q2 entitled "Charging Device That Has a Shield with an Electrical Connector Integrated "by Ajay Kumar et al., File Number of the Representative D / 97331 entitled "Pigment Deposit Trays Organic Replaceable, Variable Size Cartridges For Printing "by Dhirendra C. Damji et al., Proxy File Number D / 97332 entitled" Support REF: 28294 Fast Shifting Photoreceptor "by Ajay Kumar et al., Attorney Producer Number D / 97333 entitled" Cartridge Flatbed Train Printing "by Ajay Kumar et al., And Proxy File Number D / 97478 entitled" Spring Print Cartridge Separating the Canopy Molded Developer Roll "by Ajay Kumar et al. Cross reference is made to the following applications filed at the same time as the present one: Proxy File Number D / 97330 entitled "Process Cartridge That Includes Process Components That Have Critical Image Quality and Procedure to Lengthen the Life of Regions That Act On The Tour "by Dhirendra C. Damji et al., Attorney File Number D / 97334 entitled" Process Cartridge That Includes a Part That Defines a Handle of a Recorrido o Paper for Machine "by Dhirendra C. Damji et al., Attorney File Number D / 97351 entitled" Electrostatographic Process Cartridge Having a Grounding Pin, Photoreceptor, Non-Metallic "by Daniel A. Chiesa et al. ., Proxy File Number D / 97352 entitled "Limited Life Electrostatic Process Cartridge Having a Sub-assembly of Used Organic Pigment Electrodeposition" by Daniel A. Chiesa et al., Attorney File Number D / 97353 entitled "Cartridge of Process Having a Force Resulting from the Drive Assembly Countering the Member "by Dhirendra C. Damji et al., Attorney File Number D / 97354 entitled" Process Cartridge That Includes a Defect in the Booster Band That Prevents The Used Organic Pigment Move the Endless "by Dhirendra C. Damji et al., Proxy File Number D / 97355 entitled" Process Cartridge That Includes a Developer Reservoir Housing Defining Pa rte Of A Journey Of The Machine Paper "by Dhirendra C. Damji et al., and Attorney File Number D / 97357 entitled" All-in-One Process Cartridge That Includes Photoreceptor and Procedure Components That Have Regions Acting on The Quality of the Image, Relatively Critical "by Ajay Kumar et al.

BACKGROUND This invention relates to electrostatic reproduction machines, and more particularly to an all-in-one process cartridge that is extensible in its capacity and economical to be easily adapted for use in a family of compact electrostatic reproduction machines having different capacities of volume and life cycles of consumer materials. Specifically, the present invention relates to a process cartridge that includes a photoreceptor and process components that have critical regions that act on the quality of the image relative to the photoreceptor and to each other. In general, the electrostatic reproduction process, as practiced in the electrostatic reproduction machines, includes charging a photoconductive member to a substantially uniform potential to sensitize the surface thereof. A charged portion of the photoconductive surface is exposed in an exposure station to a luminous image of an original document to be reproduced. Typically, an original document to be reproduced is placed in register, either manually or by means of an automatic document manipulator, on an exposure glass for such an exhibition. Exposing an image of an original document as such in the exposure station records a latent electrostatic image of the original image on the photoconductor member. The recorded latent image is subsequently revealed using a developing apparatus by contacting a dry developer material or charged liquid in contact with the latent image. Commonly used are two component and one component developer materials. A typical two component dry developer material has magnetic carrier granules with fusible organic pigment particles adhered triboelectrically thereto. A single component dry developer material typically comprising only organic pigment particles can also be used. The organic pigment image formed by such development is subsequently transferred in a transfer station onto a copy sheet fed to such a transfer station, and over which the image of organic pigment particles is subsequently heated and fixed permanently to form a " original on paper "of the original image. It is well known how to provide a number of elements and components, of an electrostatic reproduction machine, in the form of a unit replaceable by the consumer or user (CRU). Typically such units are each formed as a cartridge that can be inserted or removed from the frame of the machine by a consumer or user. Reprocessing machines such as copiers and printers commonly include consumer materials such as organic pigment, volume limiting components such as an organic waste pigment container and life cycle limiting components such as a photoreceptor and a cleaning device. Because these elements of the copier or printer must be replaced frequently, it is very likely that they will be incorporated into a replaceable cartridge like the previous one.

Therefore, there are several types and sizes of cartridges, ranging from cartridges of a single machine element such as an organic pigment cartridge, to electrostatic cartridges for transfer process and organic pigment imaging all in one. The design, particularly of an all-in-one cartridge, can be very expensive and complicated due to the need to optimize the life cycles of the different elements, as well as to integrate all the included elements, without deteriorating the quality of the image at the same time. This is particularly true for all-in-one process cartridges to be used in a family of compact electrostatic reproduction machines that have different volume capacities and elements that have different life cycles. There is therefore a need for an all-in-one process cartridge of extendable and economical capacity, which produces quality images, which is easily adapted for use on several machines in a family of compact electrostatic reproduction machines having different capacities of volume and elements with different life cycles.

BRIEF DESCRIPTION OF THE INVENTION In accordance with the present invention, a process cartridge is provided which includes a housing having walls defining a process chamber and a photoreceptor mounted to the walls within the process chamber having a path or path closed loop and an image forming area having a given length. The process cartridge also includes a plurality of process components that act along the path or path of the closed circuit to produce the effects of imaging on the photoreceptor to form on, and to transfer from the photoreceptor an image of organic pigment . The process components include a load component that includes a device that issues charge with an array of pins that has a region that acts precisely only along the length of the image forming area, to prevent "dark bands" from occurring. towards the edges of an organic pigment image formed and transferred. The process components also include a developer roller, to apply charged organic pigment particles to the imaging area. The developer roller has a region that acts centered in relation to, and extending slightly beyond, each end of the length of the imaging area. Importantly, the process components include a cleaning component that includes a cleaning blade for removing organic waste pigment from the imaging area, and an endless conveyor for transporting the organic waste pigment in a direction of flow. organic waste pigment. The cleaning blade has a region that acts slightly beyond the length of the imaging area, and which is offset relative to the imaging area in the direction of the flow of the organic waste pigment, thereby allowing The process cartridge reliably and effectively produces the transfer of high quality organic pigment images.

BRIEF DESCRIPTION OF THE DRAWINGS In the detailed description of the invention presented above, reference is made to the drawings, in which: FIGURE 1 is a vertical, front illustration of an exemplary compact electrostatic reproduction machine, comprising modules that they are aligned mutually armed separately in accordance with the present invention; FIGURE 2 is a plan perspective view of the housing of the CRU module or process cartridge module of the machine of FIGURE 1; FIGURE 3 is a perspective view of the bottom of the developer sub-assembly of the process cartridge module of the machine of FIGURE 1 with the bottom of the unattached developer housing; FIGURE 4 is a perspective view of the open bottom of the process cartridge module of the machine of FIGURE 1; FIGURE 5 is an exploded view of the different sub-assemblies of the process cartridge module of the machine of FIGURE 1; FIGURE 6 is a vertical section (front to back) of the process cartridge module of the machine of FIGURE 1; and FIGURE 7 is an illustration of an open plane by sliding the photoreceptor of the process cartridge showing the relative regions of action of the process components according to the present invention.

DETAILED DESCRIPTION OF THE INVENTION Although the present invention has been described in relation to a preferred embodiment thereof, it should be understood that it is not intended to limit the invention to that embodiment. On the contrary, it is intended to cover all alternatives, modifications and equivalents that may be included within the spirit and scope of the invention as defined in the appended claims. Referring now to FIGURE 1, there is illustrated an exemplary compact electrostatic reproduction machine, without frame, comprising mutually aligned modules, assembled separately, according to the present invention. The compact machine 20 has no frame, which means that it does not have a separate machine frame to which to mount the process electrostatic subsystems, aligned with the frame, and consequently aligned in mutual relation, as is typically the case in conventional machines. . Instead, the architecture of the compact machine 20 is comprised of a number of mutually aligned, individually aligned machine modules that include several active, pre-aligned electrostatic process subsystems. As shown, the frameless machine 20 comprises at least one reinforced copy sheet feed module (CIM) 22. Preferably, the machine 20 comprises a pair of copy sheet feed modules, a primary or primary module. , the CIM 22, and an auxiliary module, the (ACIM) 24, each of which has a set of legs 23 that can support the machine 20 on a surface, thereby allowing, appropriately, that each CIM 22 , 24 forms a base of the machine 20. As also shown, each copy sheet feed module (CIM, ACIM) includes a modular frame 26 and a stacking tray assembly and a copy sheet lifting cassette 28 which it moves by sliding inwards and outwards in relation to the frame of the module 26. When, as is preferred here, the machine 20 includes two modules for feeding the copy sheets, the most basic module is considered the auxiliary module (the ACIM) , ye The uppermost module, which mounts and aligns with each other against the base module is considered the primary module (the CIM). The machine 20 then comprises an armed electronic control and a power supply module (ECS / PS) 30, which as shown, is mounted on, and aligned against, the CIM 22 (which is preferably, the top or only the copy-sheet feed module). An armed imaging module forming the latent image 32 is then mounted on and aligned against the ECS / PS module. The ECS / PS 30 module includes all controls and power supplies (not shown) for all modules and procedures of the machine 20. It also includes an image processing line unit (IPP) 34 for handling and processing digitized images of a Frame Input Scanner (RIS) 36, and generate processed digital images from a Frame Output Scanner (ROS) 38. As shown, the RIS 36, the ROS 38, and a light source 33, armed by separated in a frame of the imaging module 35, comprise the imaging module 32. The ECS / PS 30 module also includes interconnecting boards without frame and intermodular connectors (not shown), which provide all the energy and logic routes to the rest of the modules of the machine. The interconnection board (PWB) (not shown) connects the boards of the ECS controller and the power supply (not shown) to the intermodular connectors, which also locates all the connectors of the other modules in such a way that their connectors coupling could be automatically plugged into the ECS / PS module during the final assembly of the machine 20. Importantly, the ECS / PS module 30 includes a modular frame 40 to which the active components of the module are mounted as mentioned above, and forming a covered portion of the machine 20, which is also located, aligns with each other, and mounts to the adjacent armed modules, such as the CIM 22 and the imaging module 32. The reinforced copy-sheet feed modules 22, 24, the ECS / PS module 30, and the image forming module 32, mounted as mentioned above, define a cavity 42. The machine 20 includes, in an important way, an all-in-one process cartridge module or CRU 44, which can be removably inserted and mounted within the cavity 42, and which is mutually aligned with, and operatively connected to the CIM frame, the ECS / PS and the image formation modules 20, 30, 32.

In addition, as shown, the machine 20 includes an armed fuser module 46, which is mounted on top of the process cartridge module 44, as well as adjacent one end of the imaging module 32. The module of the melter 46 comprises a pair of fuser rollers 48, 50, and at least one output roller 52 for moving a sheet containing an image through, and out of, the fuser module 46 toward an output or output tray 54. The melter module also includes a heating lamp 56, temperature sensing means (not shown), paper path handling baffles (not shown), and a module frame 58 to which the active components of the paper path are mounted. module, as mentioned above, and forming a covered portion of the machine 20, which is located, mutually aligned and mounted to the adjacent armed modules, such as the image recording module 32 and the module process cartridge 44. The machine then includes a reinforced door module of the active component 60 which is rotatably mounted at a pivot point or pivot 62 at one end of the CIM 22. The door module 60 as mounted , rotates from a substantially closed vertical position to an almost horizontal open position to provide access to the process cartridge module 44, as well as undoing the jammed sheets being fed from the CIM 22. The door module 60 comprises the active components that they include a diverter feeder assembly 64, sheet registration rollers 66, organic pigment image transfer and detachment devices 68, and the outlet or output tray of the merged image 54. The door module 60 also includes the coupling components for the drive and electrical connectors (not shown), and importantly, a module frame 70 to which the active components of the module are assembled as described above, and which forms a covered portion of the machine 20, and is also located, mutually aligned and mounted to the adjacent armed modules, such as the CIM 22, the cartridge module process 44 and the melter module 46. More specifically, the machine 20 is a desktop digital copier, and each of the modules 22, 24, 30, 32, 44, 48, 60 is a high-level assembly comprising an autonomous framework and active electrostatic process components specified for such resource, and enabled as a complete and transportable product. It is believed that some of the existing digital and lighting lens reproducing machines may contain selective electrostatic modules distributed for mounting to the machine frame, such that they could be designed and manufactured by a distributor. However, there are no such machines that do not have a separate machine frame, but are comprised of armed modules that are designed and distributed each as autonomous, specifiable modular units (ie, specified separately with interface inputs and outputs). ), probable and transportable, and that are shipped and distributed specifically to allow all critical electrostatic functions after a simple assembly. A unique advantage of the machine 20 of the present invention is that its autonomous, specifiable, probable and transportable modular units allow a high level of availability to a small set of dedicated specialized module production distributors. Such a high level of availability greatly optimizes the quality, the total cost and the delivery time of the final product, the machine 20. Referring to FIGS. 1-6, the CRU or process cartridge module 44 comprises, in general , a module housing sub-assembly 72, a photoreceptor sub-subassembly 74, a load sub-assembly 76, a sub-assembly of developer 78 that includes a source of new developer material, a cleaning sub-assembly 80 for removing the residual organic pigment as organic waste pigment from a photoreceptor surface, and a deposit sub-assembly of the waste organic pigment 82 for storing the waste organic pigment. The housing subassembly of the CRU module 72 or process cartridge module 44 provides, importantly, and includes support, locating and aligning structures, as well as drive components for the process cartridge module 44. Referring still to FIGURE 1, the operation of an image forming cycle of the machine 20 using the all-in-one process cartridge module 44, can generally be described briefly as follows. Initially, a photoreceptor in the form of a photoconducting cylinder 84 of the user replaceable unit (CRU) or a process cartridge module 44, which rotates in the direction of the arrow 86, is loaded by the load sub-assembly 76. The The loaded portion of the cylinder is then transported to an imaging / exposure light 88 of the ROS 38 which forms a latent image on the cylinder 84, which corresponds to an image of a document placed on an exposure glass 90, via the module of imaging 32. It should also be understood that the image-forming module 32 can be easily changed from a digital scanning module to an image forming module with illumination lenses. The portion of the cylinder 84 containing a latent image is then rotated toward the developer sub-assembly 78, wherein the latent image is developed with a developer material such as with a single-component magnetic organic pigment loaded, using a magnetic developer roller. 92 of the process cartridge module 44. The image developed on the cylinder 84 is then rotated to an almost vertical transfer point 94 where the organic pigment image is transferred to a copy sheet substrate 96 fed from the CIM 22 or the ACIM 24 along a path of the copy sheet or substrate 98. In this case, the release device 68 of the door module 60 is provided for loading the backside of the copy sheet substrate (not shown). ) at the transfer point 94, to attract the organic pigment image charged from the photoconducting cylinder 84 onto the copy sheet substrate. The copy sheet substrate with the image of organic pigment transferred thereon is then directed towards the melter module 46, wherein the hot melter roll 48 and the pressure roller 50 rotationally cooperate to heat, melt and fix the organic pigment image on the copy sheet substrate. The copy sheet substrate can then, as is well known, be selectively transported to the output tray 54 or other subsequent fusing operation. The portion of the cylinder 84 from which the revealed organic pigment image was transferred is then advanced to the cleaning sub-assembly 80 where the organic pigment and the residual charge on the cylinder 84 are removed therefrom. The image forming cycle of the machine 20 using the cylinder 84 can then be repeated to form and transfer another image of organic pigment, when the cleaned portion is again under the load sub-assembly 76. The aspects of the detailed and specific advantages of the structure and operation of the CRU or all-in-one process cartridge module 44 will now be described with particular reference to FIGS. 1 to 6. As shown, the all-in-one process cartridge module CRU 44 generally includes six sub-assemblies comprising a housing sub-assembly in module 72 (FIGURE 2); the cleaning sub-assembly 80; the sub-mounting of the photoreceptor 74; the load sub-assembly 76; the sub-assembly of developer 78 (FIGURE 3); and the scrap organic pigment deposit sub-assembly 82. Generally, the function of the CRU or all-in-one process cartridge module 44 in the machine 20 is to electrostatically form a latent image, reveal such a latent image in an image. of organic pigment through the development of the organic pigment, and transfer of the image of organic pigment without fusing on a printing medium, such as a sheet of paper. The CRU or process cartridge module is accessible from the left side to an operator facing the CIM 22 by opening the door module 60 (FIGURE 1). Once the door module is opened, an operator or user can remove or insert the CRU or the process cartridge module 44 with one hand. Referring now to FIGS. 1-6, the housing sub-assembly of module 72 is illustrated therein (FIGURE 2). As shown, it comprises a module housing of generally rectangular shape and inverted channel 100 having a first side wall 102, a second side and opposite wall 104, an upper wall 106 including a substantially horizontal portion 108 and a nearly vertical portion 110 defining a rear end in relief 112 (further considered in relation to the process cartridge 44 that is inserted in the cavity 42). There is no rear wall, thereby resulting in an open rear end 114 for mounting the sub-mounting of the photoreceptor 74. The channel-shaped module housing also includes a front end wall 116 that is connected at an angle to the top wall 106. The housing of the channel-shaped module 100 of course does not have a bottom wall, and consequently when inverted, it defines a grooved region or partially closed process chamber 118 that opens wide to mount the sub-assembly of developer 78 (FIGURE 3). The upper wall 106 and the front end wall 116 each include a first cut 120 formed through its joining corner to partially define a first light path 122 (FIGURE 1) for the exposure light 88 of the ROS 38 of the module. image forming 32. The upper wall 106 also includes a second cut 124 formed therein at the junction angle between the horizontal 108 and the nearly vertical portions 110 thereof for mounting the load sub-assembly 76 (FIGURE 5), and to partially define a second light path 126 (FIGURES 1 and 6) for a deletion light 128 that is focused towards the area of the photoreceptor at the embossed rear end 112 of the module housing 100. Importantly, the module housing 100 includes two cross-sectional surfaces of the upper wall 130, 132 defining the second cut 124, and one 130, of those surfaces of the cross-sectional wall, has an angle desired 134 (in relation to the surface of the photoreceptor) for mounting and fixing a cleaning blade 138 (FIGURE 6) of the cleaning sub-assembly 80. Connecting or joining members 140, 142 are provided at the rearward end in relief 112 and extend from the first and second side walls 102, 104 respectively, for attaching a: handle of the module 144 to the housing of the module 100. As indicated above, the housing of the module 100 is the main structure of the CRU or process cartridge module all in one ^ 44, and substantially supports all other sub-subassemblies (cleaning sub-assembly 80, load sub-assembly 76, developer sub-assembly 78 and storage sub-assembly 82) of the all-in-one process cartridge module 44. As such, was designed to withstand stresses due to the different dynamic forces of the subassemblies, for example, to provide the reaction force required for the sub-assembly of developer 78. Because it was located only about 3 mm below the melter module 46, it is made, therefore, of a suitable plastic material to withstand the relatively high heat generated by the melter module. Mounts (not shown) of the developer sub-assembly within the grooved portion of the module housing sub-assembly are located such that the upper wall 106 of the module housing defines a desired separation comprising the first light path 122 between it and the upper wall 146 of the sub-assembly of the developer. Similarly, the rear end of the relief 112 of the upper wall 106 of the module housing is also such that it defines a desired separation between the load sub-assembly 76 and the photoreceptor or cylinder 84, when both are mounted to the rear end in relief 112 of the module housing 100. Additionally, the housing of the module 100 provides rigidity and support to the entire module of the process cartridge 44, and then the assembly auto-aligns the CRU or process cartridge module 44 relative to the contact modules. such as the CIM 22 and the ECS / PS module 30. Referring in particular to FIGURE 2, the first side wall 102 includes the electrical connectors 148, 150 for supplying power from the ECS / PS 30 module (FIGURE 1) via the sub-assembly from reservoir 82 to load sub-assembly 76. It also includes an electrical connector 152 for supplying an electrical deviation to the sub-assembly of the developer 78, as well as a member of a lineage 154 for aligning the detachment device 68 (FIGURE 1) to the photoreceptor. Also as shown, the first side wall 102 further includes an open retention device 156 for receiving an electrical grounding pin 160 for the photoreceptor 84. Importantly, the first side wall 102 further includes mounting members 162, 164 , 166 for mounting the tank subassembly 82 to the housing of the module 100, and an opening 168 for mounting an endless 170 of the cleaning sub-assembly 80 (FIGURE 6). The aperture 168 also passes the waste organic pigment received from the photoreceptor 84 at the rear end of the relief 112, towards the reservoir assembly 82, when mounted as mentioned above. Referring now to FIGURE 3, there is illustrated the sub-assembly of developer 78 of the process cartridge module 44 with an expandable bottom member 172 not attached for the internal development of the developer subassembly. As shown, the developer sub-assembly 78 comprises a generally rectangular developer housing 174 having the lower member 172, the upper portion 146, a first side 176, a second opposing side 178, a front end 180 (in relation to the insert of the cartridge), and a rear end 182. The developer housing 174 is for containing the developer material, such as, the single component magnetic organic pigment (not shown), and additionally houses the magnetic developer roller 92 ( FIGURE 1), a device of. developer deflection application 184, and a pair of agitators of developer material or organic pigment 186, 188. As shown in FIGURE 4, the developer sub-assembly 78 is mounted to the housing of the module 100, and within the grooved region 118. With the lower member 172 of the developer housing removed (for illustration purposes only), the agitators 186, 188 can be clearly seen. Also in FIGURE 4, the photoreceptor or cylinder 84 mounted within the embossed rear end 112 of the housing of the module 100, as well as, the handle of the module 144 attached to the side walls 102, 104 at the rear end in relief 112. All the tank sub-assembly 82 is further shown with an external surface 190 of its inner wall 192, mounted to the first side wall 102 of the module housing 100. The outer surface 194 of the outer wall 196 of the reservoir assembly is also clearly seen. The inner wall 192 and the outer wall 196 partially define the reservoir cavity (not shown) to contain the organic waste pigment received., as mentioned earlier. Referring now to FIGURE 5, there is presented an exploded perspective view of the different sub-assemblies, as mentioned above, of the CRU or process cartridge module 44. As shown, the handle of the module 144 can be attached to the mounting members 140, 142 at the embossed rear end 112 of the module housing 100, and the reservoir sub-assembly 82 can be mounted to the first side wall 102 of the cartridge housing. The developer sub-assembly 78 is mounted within the grooved region 118 of the housing of the module 100, and is partially seen through the first cut 120. Advantageously, the sub-assembly of the developer is placed in the grooved region 118 so that the upper part 146 (FIGURE 3) of the developer sub-assembly and the inner side of the side wall 106 of the module housing define the first light path 122 for the exposure light 88 of the ROS 38 (FIGURE 1). As also shown, the load sub-assembly 76 can be mounted, in the second cut 124, to the housing of the module 100, and includes a slot 198, through the load sub-assembly, which defines the part of the second light path 126 for The deletion light 128 passes to the photoreceptor 84. Referring next to FIGURE 6, it shows a vertical section (from back to front) of the CRU or process cartridge module 44 as seen along the plane 6-6 of FIGURE 5. As shown, the developer sub-assembly 78 is mounted within the ribbed region 118 of the housing sub-assembly of the module 72 as defined in part by the front end wall 116, the second side wall 104 and the upper wall 106 of the module housing sub-assembly. The handle of the module 144 as it is attached to the mounting members 140, 142, (only one of which is visible), forms a portion of the path of the sheet or paper 98 of the machine 20 (FIGURE 1) by being separated from one another. distance 200 of the photoreceptor 84 at the embossed rear end 112 of the housing of the module 100. The photoreceptor or cylinder 84 is mounted to the side walls 102, 104, (only one of which is visible), and as shown is located inside the rear end in relief 112 and rotates in the direction of arrow 86. The load sub-assembly 76 is mounted within the second cut 124 in the upper wall 106 and includes the slot 198 defining part of the second light path 126 for the deletion light 128 to pass to the photoreceptor 84. Upstream of the load sub-assembly 76, the cleaning sub-assembly 80, which includes the cleaning blade 138 and the worm that removes the organic waste pigment 170, it is mounted inside the embossed rear end 112, and in contact with the photoreceptor 84 for cleaning. As further shown, the upper wall 106 of the housing of the module 100 is separated from the upper part 146 in the sub-assembly of the developer 78, thereby defining the part of the first light path 122 for the exposure light 88 of ROS 38. (FIGURE 1) . The first light path 122 is located as if it were incident on the photoreceptor at a point downstream of the load sub-assembly 76. The front part 180, the upper part 146 and the lower member 176 of the sub-assembly of the developer define a chamber 202, which has an opening 204, for containing the developer material (not shown). The first and second agitators 186, 188 are shown within the chamber 202 to mix and move the developer material toward the opening 204. The developer material biasing device 184 and a loading molding and doctor blade 206 are mounted in the opening 204 As shown, the magnetic developing roller 92 is mounted in the aperture 204 to receive the loaded and measured developer material from such aperture, and to transport such developer material toward a developing ratio with the photoreceptor 84. In a cartridge electrostatic process for developing the unloaded area (DAD), all in one, it has been found that to have a development and transfer of a consistent high quality organic pigment image, the components of the included electrostatic process must have regions of critical action in relation to a region of image formation on the photoreceptor , and in mutual relation. Referring now to FIGURE 7, the photoreceptor or cylindrical or common drum-shaped photoreceptor member 84 of the process cartridge 44 is illustrated as a cut plane 84"having a total axial length LT and an image forming length Li for substrates or sheets fed from the short edge For reasons of optimum image quality in a DAD process, it has been found that an action region 210 in the load metering blade 206 (see also FIGURE 6) for loading and dosing organic pigment for the development, should be focused, and as precisely as the length of the image Li of the photoreceptor 84 as shown, the same is also true for the filter action region 212 of the load-emitting device of the bolt array 214 of the load sub-assembly 76 (FIGURE 5) to prevent "dark bands" from occurring towards the edges of a formed and transferred image.

On the other hand, the regions of action of the developer roller 92, as well as those of a grid member 216 and of a shielding member 218 both also of the load subassembly 76, may extend slightly towards either end beyond the length of Li image formation, as shown. Importantly, in accordance with an aspect of the present invention, wherein the direction of flow of the organic waste pigment is indicated by the arrow 220, the cleaning blade 138 of the cleaning sub-assembly 80 is not centered, but deflected as shown in FIG. shows a distance 224 in relation to the length of formation of the image Li, and in the direction of flow of the organic waste pigment 220. The region of action of the release device 68 (FIGURE 1) although not shown in FIGURE 7 , was made, advantageously, precisely equal to that of the charge-emitting device of the pin array 212 to avoid recharging the photoreceptor areas outside the image-forming length Li, thereby causing subsequent contamination of the organic pigment . As can be seen, a process cartridge is provided which includes a housing having walls defining a process chamber and a photoreceptor mounted to the walls within the process chamber and having a closed circuit path or path and an area of image formation that has a given length. The process cartridge also includes a plurality of process components that act along the path or path of the closed circuit to produce the effects of imaging on the photoreceptor to form on, and to transfer from, the photoreceptor, an image of organic pigment The process components include a load component that includes a device that issues charge with an array of pins that has a region that acts precisely only along the length of the image forming area, to prevent "dark bands" from occurring. towards the edges of an organic pigment image formed and transferred. The process components also include a developer roller, to apply charged organic pigment particles to the imaging area. The developer roller has a region that acts centered in relation to, and extending slightly beyond, each end of the length of the imaging area. Importantly, the process components include a cleaning component that includes a cleaning blade for removing organic waste pigment from the imaging area, and an endless conveyor for transporting the organic waste pigment in a direction of flow. organic waste pigment. The cleaning blade has a region that acts slightly beyond the length of the imaging area, and which is offset relative to the imaging area in the direction of the flow of the organic waste pigment, thereby allowing The process cartridge reliably and effectively produces the transfer of high quality organic pigment images. Although the embodiment of the present invention described herein is preferred, it should be appreciated from the teachings herein that various alternatives, modifications, variations or improvements may be made to it by those skilled in the art, with which it is intended to be covered by the following claims: It is noted that in relation to this date, the best method known by the applicant to carry out the aforementioned invention, is the conventional one for the manufacture of the objects to which it relates. Having described the invention as above, property is claimed as contained in the following:

Claims (3)

1. An electrostatic process cartridge that can be removably mounted in a cavity defined by the coupled modules of the machine that are part of an electrostatic reproduction machine, the process cartridge is characterized in that it comprises: (a) a housing having walls that define a process chamber; (b) a rotating cylindrical photoreceptor mounted to the walls inside and horizontally within the process chamber, the cylindrical photoreceptor includes an image forming area, an image forming length and a fixed rotational closed circuit path or path within the process chamber; and (c) a plurality of process components that act along the path or path of the closed circuit to produce the effects of image formation on the photoreceptor to form on, and to transfer from the photoreceptor, an image of organic pigment; The process components include (i) a load component that includes a device that issues charge with an array of pins that has a region that acts precisely only along the length of the imaging area, to prevent them from occurring " dark bands "towards the edges of an organic pigment image formed and transferred; (ii) a developer roller, for applying charged organic pigment particles to the imaging area, the developer roller has a region that acts centered in relation to, and extending slightly beyond, each end of the length from the area of image formation; and (iii) a cleaning component that includes a cleaning blade for removing organic waste pigment from the imaging area, and an endless conveyor for transporting the organic waste pigment in a flow direction of the organic waste pigment, the cleaning blade has a region that acts slightly beyond the length of the imaging area, and which is offset relative to the imaging area in the direction of the flow of the organic waste pigment, thereby allowing The process cartridge reliably and effectively produces and transfers high quality organic pigment images. The process cartridge according to claim 1, characterized in that the process components also include a charge metering blade to load and measure the organic pigment particles, the load metering blade is centered in relation to, and has a region that acts only precisely along the length of the imaging area. The process cartridge according to claim 1, characterized in that the charging component also includes a lattice member and a shielding member, each of which has a region that acts slightly beyond the length of the lattice area. image formation SUMMARY OF THE INVENTION A process cartridge including a housing having walls defining a process chamber and a photoreceptor mounted to the walls within the process chamber having a closed circuit path or path and an image forming area having a length Dadaist. The process cartridge also includes a plurality of process components that act along the path or path of the closed circuit to produce the effects of imaging on the photoreceptor to form on, and to transfer from the photoreceptor an image of organic pigment . The process components include a load component that includes a device that issues charge with a bolt array that has a region that acts precisely only along the length of the imaging area, to prevent * dark bands from occurring. "towards the edges of an organic pigment image formed and transferred. The process components also include a developer roller, to apply charged organic pigment particles to the imaging area. The developer roller has a region that acts centered in relation to, and extending slightly beyond, each end of the length of the imaging area. Importantly, the process components include a cleaning component that includes a cleaning blade for removing organic waste pigment from the imaging area, and an endless conveyor for transporting the organic waste pigment in a direction of flow. organic waste pigment. The cleaning blade has a region that acts slightly beyond the length of the imaging area, and which is offset relative to the imaging area in the direction of the flow of the organic waste pigment, thereby allowing The process cartridge reliably and effectively produces the transfer of high quality organic pigment images.