摘要:
Apparatus and method for minimizing ghosting defects and process control instabilities for a printing system are disclosed. According to an exemplary embodiment, a controller retrieves uniformity measurements of an interdocument zone (IDZ) and sheet zone (SZ). In response to the uniformity measurements, a transfer current IDZ level is controlled to minimize differences in subsequent charging, photodischarge and/or development associated with the IDZ and SZ.
摘要:
Apparatus and method for minimizing ghost defect are disclosed. Ghosting results in interdocument bands when paper size is changed and process control instability due to using the interdocument zone (IDZ) for voltage and density control. A controller retrieves feedback measurements of the IDZ and sheet zone (SZ) non-uniformity. In response to the measurements, the transfer current IDZ level is controlled to minimize differences in subsequent charging, photodischarge and development.
摘要:
An apparatus, system and method are provided for causing one or more selectable strip radii associated with stripping a substrate from a belt in a fuser after an image has been fused to the substrate during a printing process. The fuser has a first member having a first surface, and a belt having a first portion that contacts the first of the first member. The fuser has a second member having a second surface that contacts a second portion of the belt in a region defining a fusing nip. The fuser has a stripping apparatus, positioned downstream of the fusing nip in a process direction, comprising one or more transducers that cause one or more respective transducer segments to move at a frequency that deflects one or more sections of the first portion of the belt to cause one or more selectable strip radii on demand.
摘要:
An apparatus, system and method are provided for causing one or more selectable strip radii associated with stripping a substrate from a belt in a fuser after an image has been fused to the substrate during a printing process. The fuser has a first member having a first surface, and a belt having a first portion that contacts the first surface of the first member. The fuser has a second member having a second surface that contacts a second portion of the belt in a region defining a fusing nip. The fuser has a stripping apparatus, positioned downstream of the fusing nip in a process direction, comprising one or more transducers that cause one or more respective transducer segments to move at a frequency that deflects one or more sections of the first portion of the belt to cause one or more selectable strip radii on demand.
摘要:
A xerographic printing device, including a charging device having a thick grid that includes a first pattern divided by a second pattern. In some embodiments the first pattern is a hex, the second pattern is a solid band, the first pattern is divided into two sections of equal size, each section corresponds to a two-dimensional array of pins, the first pattern is formed by etching, the second pattern is formed by the absence of etching, and the grid is constructed of stainless steel. The charging device can be a corotron, a dicorotron, a scorotron, a discorotoron, a pin corotron, a pin scorotron, or any other charging device of that type.
摘要:
A transfer assist member comprising a plurality of layers, one of the layers being a check film layer comprised of a thermoplastic layer present on a polymer layer.
摘要:
An electrophotographic marking apparatus and an automatic method for automatically scanning and correcting TAB pressure non-uniformity using a cross-process uniformity controller and a closed loop system. The TAB is contacted with an image on a photoreceptor surface to leave its imprint or footprint on the image, which are analyzed for TAB performance and pressure. This method uses a CPUC full width array in conjunction with a software version for assessing TAB performance. This method continuously monitors the TAB performance during the running of a marking apparatus.
摘要:
Systems and methods are described that facilitate automatically and uniformly depositing a marking material on transfer assist blade (TAB) petals to improve TAB pressure profile accuracy. A TAB liftoff timing value is adjusted in non-volatile memory (NVM) to delay TAB liftoff beyond a trailing edge of a page on which an oversized (in the process direction) image being printed. Toner deposited on a photoreceptor belt beyond the trailing edge of the page is picked up by the TAB petals once the trailing edge of the page has passed the TAB. The TAB is then disengaged and re-engaged against a backside of a next page, where the TAB petals deposit the uniformly acquired toner to generate the TAB pressure profile.
摘要:
A printing apparatus and method include a charging device positioned adjacent a photoreceptor that places a latent image charge on the photoreceptor. A donor device is adjacent the photoreceptor, and transfers marking material to regions of the photoreceptor that have received the latent image charge. In addition, a media path that is adjacent the photoreceptor causes at least one sheet of media to be placed on the photoreceptor and the marking material. A transfer assist blade that is also adjacent the photoreceptor, presses the sheet of media against the photoreceptor to cause the marking material to be transferred to the sheet of media. The apparatus also includes a controller that is operatively connected to the transfer assist blade. The controller causes the transfer assist blade to apply more pressure to leading and trailing portions of the sheet of media relative to the middle portion of the sheet of media.
摘要:
This invention relates to an electrophotographic marking apparatus and provides an automatic method for automatically scanning and correcting TAB pressure non-uniformity using a cross-process uniformity controller and a closed loop system. The TAB is contacted with an image on a photoreceptor surface to leave its imprint or footprint on the image. Sensing said footprint and marking indicated changes in the TAB performance and pressure. This method uses a CPUC full width array in conjunction with a software version for assessing TAB performance. This method continuously monitors the TAB performance during the running of a marking apparatus.