Patent application number | Description | Published |
20080220359 | TONER PROCESSES - Disclosed herein are toner particles generated by emulsion/aggregation processes. The processes are conducted under conditions that shorten the time for coalescence and post-formation washing, thereby increasing efficiency of the processes as compared to conventional processes. | 09-11-2008 |
20080241724 | TONER COMPOSITIONS INCLUDING STYRENE CONTAINING EXTERNAL ADDITIVES - Toner compositions of toner particles including additive particles upon an external surface of the toner particles, wherein the additive particles include crosslinked styrene containing polymer particles, exhibit reduced sensitivity to relative humidity. The crosslinked styrene containing polymer particles have an average particle size of from about 30 nm to about 300 nm, and may include styrene homopolymer particles, styrene copolymer particles or mixtures thereof. A process of reducing the relative humidity sensitivity of toner using such external surface additive is also described. | 10-02-2008 |
20090186287 | PHOTORECEPTOR AND METHOD OF MAKING SAME - Disclosed is an electrophotographic photoreceptor having a protective overcoat layer including a polyol binder; a hole transport material; a curing agent; and a surface-treated tin oxide particle filler. Also disclosed is a process for forming a photoreceptor that includes providing a photoreceptor substrate; applying a charge generating layer; applying a charge transport layer; and applying a protective overcoating layer over the substrate; such that the protective overcoat layer includes a polyol binder; a hole transport material; a curing agent; and a surface-treated tin oxide particle filler. Also included is a method of forming an image, including the disclosed photoreceptor. | 07-23-2009 |
20090233197 | CROSSLINKING OUTER LAYER AND PROCESS FOR PREPARING THE SAME - The presently disclosed embodiments are directed to an improved low wear overcoat for an imaging member having a substrate, a charge transport layer, and an overcoat positioned on the charge transport layer, and a process for preparing the same including combining a binder, a hole transport molecule, a melamine formaldehyde crosslinking agent and an acid catalyst dissolved in an alcohol solvent to form an overcoat solution, and subsequently providing the overcoat solution onto the charge transport layer to form an overcoat layer. | 09-17-2009 |
20090263737 | IMAGING MEMBER AND METHODS OF FORMING THE SAME - The presently disclosed embodiments are directed to an imaging member having an outermost layer formulation that includes wax particles which creates a rough surface morphology for the layer and imparts increased scratch resistance, reduced torque, and improved cleaning performance to the layer. In embodiments, the outermost layer is an overcoat layer used for an improved imaging member having a substrate, a charge transport layer, and an overcoat positioned on the charge transport layer. | 10-22-2009 |
20090326087 | METHOD FOR TREATING MICROCAPSULES FOR USE IN IMAGING MEMBER - The presently disclosed embodiments are directed to a method for treating microcapsules for use in an improved imaging member, namely, in the overcoat layer. The overcoat layer is used for an imaging member having a substrate, a charge transport layer, and an overcoat positioned on the charge transport layer, and a method for making the overcoat layer using the treated microcapsules is provided. | 12-31-2009 |
20100015539 | OVERCOAT LAYER IN PHOTORECEPTIVE DEVICE - The presently disclosed embodiments are directed to an improved low wear overcoat for an imaging member having a substrate, a charge transport layer, and an overcoat layer positioned on the charge transport layer, and a process for preparing the same, where the overcoat layer includes an aromatic polyol binder, a hole transport molecule, and a melamine formaldehyde curing resin. | 01-21-2010 |
20100186624 | METHOD OF MAKING A PIGMENTED PHASE CHANGE INK WITH DISPERSANT AND SYNERGIST - A method of making a phase change ink composition includes adding to a device with a stirring element at least one pigment, at least one dispersant and at least one synergist, processing the device at an elevated temperature and at a stirring rate to wet the at least one pigment to obtain an ink concentrate, and mixing the ink concentrate with an ink vehicle to obtain the ink composition. The device may be an extruder, an attritor or the like. The method allows for the reduction in the amount of dispersant to include in the ink. | 07-29-2010 |
20100201612 | PHOTORECEPTOR WITH A TFT BACKPLANE FOR XEROGRAPHY WITHOUT A ROS SYSTEM - Systems and methods are described that facilitate eliminating a need for a raster output scanner (ROS) or laser when generating a latent image on a photoreceptor. An addressable backplane is employed, comprising an array of field effect transistors (e.g., silicon or organic thin film transistors, or TFTs), wherein each TFT corresponds to a single pixel on a charge transport layer on the photoreceptor surface. Latent image formation is performed by forming a surface potential using corona charging, and then directing free charge carriers toward the photoreceptor surface to reduce electrostatic potential in areas that need to be toned. TFTs in the array are individually addressed, or selected, to connect to a common ground, which allows photodischarge to occur only in selected areas (e.g., pixels associated with the selected TFTs). Once the array of TFTs is addressed, an LED light source emits light over the surface of the photoreceptor, and only the selected (grounded) TFTs permit their associated pixels to discharge. In this manner, a latent image is formed without a need for a bulky and expensive ROS. | 08-12-2010 |
20100201777 | IMAGE FORMING APPARATUS WITH A TFT BACKPLANE FOR XEROGRAPHY WITHOUT A LIGHT SOURCE - Systems and methods are described that facilitate using TFT control of electronic discharge for surface potential reduction and latent image formation on an imaging member. Corona charging is performed to first create a background surface potential, followed by selective discharge of individual pixels using an array of TFTs to supply free charge carriers to reduce the electrostatic surface potential to nearly zero. This is followed by discharged area development (DAD) to develop the latent image on a print medium (e.g., paper). The described systems and methods do not require a HVPS to drive the backplane; therefore, the TFT matrix is electrostatically decoupled from the developer and other system components in direct contact with the imaging member. Accordingly, known addressing systems may be used to address the TFT array. | 08-12-2010 |
20110033798 | PHOTORECEPTOR OUTER LAYER AND METHODS OF MAKING THE SAME - The presently disclosed embodiments relate generally to layers that are useful in imaging apparatus members and components, for use in electrophotographic, including digital, apparatuses. Embodiments pertain to an improved electrophotographic imaging member comprising a very thin outer layer on the imaging member surface, where the outer layer comprises healing materials that act as a barrier against moisture and/or surface contaminants. The improved imaging member exhibits improved xerographic performance, such as reduced wear and deletions in high humidity conditions. Embodiments also pertain to methods for making the improved electrophotographic imaging member. | 02-10-2011 |
20110086299 | LIGHT SHOCK RESISTANT PROTECTIVE LAYER - Embodiments pertain to a novel imaging member, namely, an imaging member or photoreceptor comprising a removable protective outer layer which comprises light-absorbing material which substantially prevents any light absorption by the overcoat layer. Thus, the light-absorbing material reduces the intrinsic light shock suffered by conventional overcoat layers without negatively impacting electrical properties of the overcoat layer while improving print quality. | 04-14-2011 |
20110086300 | PHOTORECEPTOR SURFACE LAYER COMPRISING SECONDARY ELECTRON EMITTING MATERIAL - Presently disclosed embodiments relate to an improved electrophotographic imaging member or photoreceptor comprising a surface layer on the photoreceptor, where the surface layer comprises secondary electron emitting materials that act as a robust electrically active layer. Photoreceptors incorporating such materials into or on the surface will exhibit an increase photoreceptor life and also a reduction the operating voltage of bias charge roll (BCR) charging systems while maintaining excellent charge uniformity. | 04-14-2011 |
20120028178 | PHOTORECEPTOR OUTER LAYER AND METHODS OF MAKING THE SAME - The presently disclosed embodiments relate generally to layers that are useful in imaging apparatus members and components, for use in electrophotographic, including digital apparatuses. Embodiments pertain to an improved electrophotographic imaging member used in customer replaceable units (CRU) comprising a very thin outer layer on the imaging member surface, where the outer layer comprises healing materials that act as a barrier against moisture and/or surface contaminants. The improved imaging member exhibits improved xerographic performance, such as reduced wear and deletions in high humidity conditions. | 02-02-2012 |
20120069122 | ELECTROSTATIC IMAGING MEMBER AND METHODS FOR USING THE SAME - Embodiments pertain to a novel imaging member, namely, an electrostatic latent image generating member, and methods for using the same, that can generate an electrostatic latent image digitally with fewer steps and without using a raster output scanner (ROS) or free charge carriers. Embodiments provide a novel way of generating an electrostatic latent image without the shortfalls suffered by current photoreceptors, such as for example, charge mobility issues, unstable cycling, surface wear, lateral charge migration and sensitivity to light shock. | 03-22-2012 |
20120099897 | SURFACE-PATTERNED PHOTORECEPTOR - Presently disclosed embodiments relate generally to layers that are useful in imaging apparatus members and components, for use in electrophotographic, including digital, apparatuses. More particularly, the embodiments pertain to an electrophotographic imaging member having its outer surface patterned such that friction with the cleaning blade is significantly reduced. | 04-26-2012 |
20120201585 | APPARATUS AND METHODS FOR DELIVERY OF A FUNCTIONAL MATERIAL TO AN IMAGE FORMING MEMBER - The presently disclosed embodiments relate generally to an image forming apparatus comprising: a) an imaging member, and b) a delivery member in contact with the surface of the imaging member, wherein the delivery member has a surface layer comprised of an elastic material impregnated with a functional healing material, and the functional healing material is transferred onto the imaging member by diffusion through the elastic material to the surface of the imaging member. Embodiments also pertain to an improved electrophotographic imaging member comprising a very thin outer layer on the imaging member surface, where the outer layer comprises functional healing materials that act as a lubricant and or a barrier against moisture and/or surface contaminants. The improved imaging member exhibits improved xerographic performance, such as reduced friction and deletions in high humidity conditions. | 08-09-2012 |
20130028636 | APPARATUS AND METHODS FOR DELIVERY OF A FUNCTIONAL MATERIAL TO AN IMAGE FORMING MEMBER - The presently disclosed embodiments relate generally to an image forming apparatus comprising: a) an imaging member, b) a bias charging roller in contact with the surface of the imaging member, and c) a delivery unit in contact with the surface of the bias charge roller, wherein the delivery unit is fabricated as a polymer matrix impregnated with functional materials, such that the functional material is transferred onto the imaging member from the delivery unit via the bias charging roller. Embodiments also pertain to an improved electrophotographic imaging member comprising a very thin outer layer on the imaging member surface, where the outer layer comprises functional materials, such as paraffin, that act as a lubricant and or a barrier against moisture and/or surface contaminants. The improved imaging member exhibits improved xerographic performance, such as reduced friction and deletions in high humidity conditions. | 01-31-2013 |
20130108312 | APPARATUS AND METHODS FOR DELIVERY OF A FUNCTIONAL MATERIAL TO AN IMAGE FORMING MEMBER | 05-02-2013 |
20130280647 | CROSS-LINKED CHARGE TRANSPORT MATERIALS MADE BY LOW ENERGY HYDROGEN BOMBARDMENT - This application discloses a photoreceptor comprising a surface layer that is comprised of an organic composition cured by neutral molecular hydrogen bombardment. Methods for forming a photoreceptor having a cured surface are disclosed. | 10-24-2013 |
20140141361 | Surface Control Apparatuses Reducing Print Defects and Methods of Using Same - Surface control apparatuses including an imaging member having a charge retentive surface for developing an electrostatic latent image thereon. The imaging member including a substrate, a photoconductive layer disposed on the substrate, and a surface control (SC) layer disposed on the outer surface of the imaging member. Image forming apparatuses having such surface control apparatuses installed and methods of reducing print defects using such image forming apparatuses. | 05-22-2014 |
20140294424 | SEMI-CONTACT BIAS CHARGE ROLLER - There is described an image forming apparatus including an imaging member having a charge retentive-surface for developing an electrostatic latent image thereon, a substrate and a photoconductive member disposed on the substrate. A bias charge roller for applying an electrostatic charge on the charge retentive surface to a predetermined electric potential is included in the image forming apparatus. The bias charge roller includes a first circumferential area in contact with the photoconductive member (CC | 10-02-2014 |
20140295333 | IMAGE FORMING SYSTEM - The presently disclosed embodiments relate generally to image forming systems comprising imaging apparatus members and toner compositions. More specifically, the present embodiments relate to specific toner compositions for use with electrophotographic imaging members comprising an overcoat layer protecting the imaging member surface and a contact type charging device, such as a “bias charge roll” (BCR). The toner compositions comprise a combination of additives that provide an image forming system that does not suffer from the commonly observed deletion and imaging member wear issues. | 10-02-2014 |