摘要:
An apparatus for applying an electrical charge to a charge retentive surface, wherein a bias charge roll member is situated proximately to a surface to be charged such as, a photoreceptor having a cleaning system which includes a web material in contact with the bias charge roll to remove containments thereform.
摘要:
In accordance with the invention, there is an electrophotographic charging device including a first electrode, a second electrode adjacent the first electrode, a plurality of nanostructures adhering to the first electrode, and voltage supplies electrically connected to the first electrode and the second electrode, wherein the voltage difference between the first electrode and the second electrode creates a high electric field at the nanostructures to cause charge species generation that is deposited on a receptor.
摘要:
Electrophotographic charging devices and methods for charging a receptor with a solid state charging device are disclosed. In an exemplary embodiment, the solid state charging device can include a dielectric layer, a first electrode disposed adjacent to a first surface of the dielectric layer, and a second electrode having a first surface disposed adjacent to a second surface of the dielectric layer. The solid state charging device can further include a plurality of nanostructures each having an end in electrical contact with a second surface of the second electrode. The exemplary solid state charging devices including the nanostructures can use less voltage than conventional charging devices, produce a reduced amount of oxidizing agents, such as, ozone and NOx, and/or operate at a lower temperature.
摘要:
Electrophotographic charging devices that can be used to charge or discharge, for example, a receptor in the electrophotographic process are provided. According to various embodiments, the exemplary charging devices can include a coronode disposed opposing and spaced apart from a receptor, and a plurality of nanostructures, wherein each of the plurality of nanostructures has an end, edge, or side in electrical contact with the coronode. The exemplary charging devices including the nanostructures can use less power, i.e. voltage and/or current than conventional charging devices and produce a reduced amount of oxidizing agents, such as, ozone and NOx. The nanostructures can serve to increase the intensity of the local electric fields for more efficient charge generation at reduced voltages.
摘要:
Apparatus for charging a substrate, including: an elongated charging member having a crowned surface; an elongated pressure member having the pressure member being supported for pressure engagement with the charging member to form a nip therebetween adapted to receive the substrate. There is also disclosed a method for making the apparatus.
摘要:
A method for making a developer roll sleeve in which a core substrate roll is spray coated with a conductive composition including a host resin composition and a wear-resistance imparting additive. Preferably, the host resin composition includes a phenolic thermosetting resin and a conductivity additive such as a carbon black, graphite and the like. Further, the wear resistance imparting additive is preferably selected from the group consisting of a polytetrafluoroethylene resin (e.g., Teflon), graphite, ultra-high molecular weight polyethylene having a molecular weight from about 3,000 to about 4,500 grams, molybedenum disulfide, silicone and mixtures thereof. The wear resistance imparting additive is preferably provided in an amount sufficient to obtain a thickness wear rate of less than about 0.00047 percent per printing cycle.
摘要:
An apparatus which cleans particles from a tracking region on a photoconductive drum. A spacer maintains the spacing between the photoconductive drum and a developer roller substantially constant. The spacer contacts the photoconductive drum in the tracking region. The cleaning member, mounted on a transfer roller, removes particles adhering to the tracking region so as to ensure that there is no build up of particles in the tracking region changing the spacing between the photoconductive drum and the developer roller.
摘要:
Systems and methods of determining a predicted usable life of components, such as a photoreceptor, associated with an imaging device. The systems and methods include a power source configured to increase an electric field across the photoreceptor. A sensor or array is configured to detect charge deficient spots (CDS) in a charge transport layer (CTL) of the photoreceptor as a result of increasing the electric field. The systems and methods are configured to determine the predicted useable life of the photoreceptor based on the detected CDS. The systems and methods are further configured to output a report of the estimation. The estimation is conducted at fixed or variable intervals throughout the life of the photoreceptor and/or imaging device.
摘要:
A printing device includes at least one printing engine that has actuators and sensors. At least one engine controller is operatively connected to the printing engine, the engine controller uses software to control operations of the printing engine. At least one non-volatile memory is operatively connected to the engine controller. The non-volatile memory stores values used by the engine controller to control operations of the printing engine. Further, at least one adapter card is operatively connected to the non-volatile memory and to the actuators and sensors. The adapter card stores data and receives sensor feedback from the sensors. The adapter card uses the data and the sensor feedback to control the actuators by bypassing the engine controller when communicating with the actuators. The adapter card provides adapter card feedback to the non-volatile memory.
摘要:
A toner composition with a novel surface additive package for developing images. The additive package includes sol-gel silica, a PDMS silica, an organic spacer such as PMMA and two HMDS silicas. The toner composition exhibits improved control of voltage, higher print density, lower toner amount remaining on the roll, lower toner usage, and reduced drum contamination. The toner composition also exhibits improved dry rheological properties and improved fix properties. These improved properties make this toner composition useful for higher speed printing while using less toner.