Abstract: An ion writing unit including an ion generator and an array of electrode nozzles aligned to receive and guide generated ions. The ion writing unit convertibly operates between at least a first mode and a second mode. In the first mode, ions flow from the ion generator through selected nozzles at a first flow rate to cause image formation on an electrically biased passive e-paper spaced apart from the electrode holes. In the second mode, ions flow from the ion generator through at least some electrode nozzles at a second flow rate that does not cause image formation on the electrically biased passive e-paper.

Abstract: An imaging device can include an imaging drum to support a carrier fluid. A roller can remove a portion of the carrier fluid from the imaging drum. A fluid container can collect the carrier fluid from the roller. A fluid remover on the container can be used to remove the carrier fluid from the roller.

Abstract: In one example, a method for calibrating a position of a charge roller is described. The method may include a processor positioning a first end of a charge roller to a first plurality of index positions, determining a capacitance between the charge roller and a photoconductor imaging plate at each of the first plurality of index positions, determining a first index position of the first plurality of index positions with a greatest change in capacitance, and calibrating a position of the charge roller based upon the first index position.

Abstract: Embodiments of the present invention are directed to systems and methods for writing on electronic paper (“e-paper”) and display platforms implemented with e-paper. In one aspect, a system for writing information to electronic paper includes a writing module and an erasing unit connected to the writing module. The erasing unit is configured to erase information stored in the electronic paper. The system also includes a writing unit connected to the writing module and is configured to write information to the electronic paper. Information is written to the electronic paper by orienting the writing module so that the electronic paper passes the erasing unit prior to passing the writing unit.

Abstract: Example systems and methods for writing on electronic paper (“e-paper”) are described. In one example, a system for writing information on electronic paper includes a writing module comprising an array of electrodes. The writing module is configured to selectively operate one or more electrodes in the array of electrodes to write information on the electronic paper. The system also includes a compliant mechanism coupled to the writing module to establish contact between the writing module and the electronic paper.

Abstract: An access medium includes a passive e-paper, display portion to display a first access element and a memory resource to store a second access element. Authentication is determined by evaluation of the first access element and evaluation of the second access element.

Abstract: Provided in one example herein is a three-dimensional (“3D”) printing method, comprising: (A) forming a layer comprising particles comprising a thermoplastic; (B) disposing over at least a portion of the layer a coalescent agent, which is radiation-absorbing and has a thermal decomposition temperature lower than or equal a melting temperature of the thermoplastic; (C) forming an object slice of a 3D object by exposing the coalescent agent to a radiant energy such that at least some of the coalescent agent thermally decomposes while causing at least some of the particles to fuse, wherein the object slice comprises the fused particles, and wherein the thermally decomposed coalescent agent is not radiation-absorbing; and (D) repeating (A) to (C) to form the 3D object comprising multiple object slices bound depth-wise to one another.

Abstract: A transaction medium comprises a non-e-paper portion and a passive e-paper display portion to display a first expression of an authentication element in a secure representation. The first expression is related to a second expression of the authentication element, wherein a comparison of the first expression and the second expression determines authentication.

Abstract: In some examples, an image sensor system comprises a source module including a source housing having a source window and a source shielding member, the source module to emit a detection signal through the source window. the source shielding member surrounding the source window and extending in an outward direction from the source window. The image sensor system further comprises a detection module including a detection housing having a detection window and a detection shielding member, the detection module spaced apart from the source module and to detect the detection signal emitted from the source module and passed through the detection window, the detection shielding member surrounding the detection window and extending in an outward direction from the detection window.

Abstract: Apparatus, printers, and methods to remove material from a printer surface are disclosed. An example apparatus includes a fluid remover to remove printing material from a printer surface, and a coating material reservoir to store coating material and to apply the coating material to the fluid remover to reduce an amount of printing material transferred to the fluid remover from the printer surface.

Abstract: One example of a financial transaction medium includes a passive electronic paper display. A security code is displayed on a portion of the passive electronic paper display.

Abstract: One example provides a display device. The display device includes an electronic paper display imageable by receiving charges on an imaging surface of the electronic paper display. The display device includes a first ground electrode opposite to a first portion of the imaging surface of the electronic paper display and a second ground electrode opposite to a second portion of the imaging surface of the electronic paper display. Writing to the second portion of the electronic paper display is selectively disableable.

Abstract: Print glossing is described. Print glossing can be performed on a glossing drum having a location affixed to a circumferential outer surface thereof, where the location transits from a first position in an apparatus having a first temperature range selected to enable reflow of ink applied to a substrate that is placed at the location to a second position in the apparatus having a second temperature range selected for clean release from the location of the ink applied to the substrate.

Abstract: An ion writing unit includes an ion generator and an array of electrode nozzles aligned to receive and guide generated ions. An air flow source causes an air flow adjacent the ion generator or in an orientation adjacent the electrode nozzles.

Abstract: An ion writing unit including an ion generator and an array of electrode nozzles aligned to receive and guide generated ions. The ion writing unit convertibly operates between at least a first mode and a second mode. In the first mode, ions flow from the ion generator through selected nozzles at a first flow rate to cause image formation on an electrically biased passive e-paper spaced apart from the electrode holes. In the second mode, ions flow from the ion generator through at least some electrode nozzles at a second flow rate that does not cause image formation on the electrically biased passive e-paper.

Abstract: An ion writing unit includes a housing, an electrode assembly, and a heating mechanism. The housing includes a chamber at least partially containing an ion generator. The electrode assembly includes an array of electrode nozzles on one exposed exterior surface of the housing and aligned to receive and guide generated ions. The heating mechanism applies heat to at least one of the chamber and at least a portion of the array of electrode nozzles.

Abstract: In some examples, an image sensor system comprises a source module including a source housing having a source window and a source shielding member, the source module to emit a detection signal through the source window. the source shielding member surrounding the source window and extending in an outward direction from the source window. The image sensor system further comprises a detection module including a detection housing having a detection window and a detection shielding member, the detection module spaced apart from the source module and to detect the detection signal emitted from the source module and passed through the detection window, the detection shielding member surrounding the detection window and extending in an outward direction from the detection window.

Abstract: An electronic paper device includes a ground plane, a charge receiving layer, and a porous stand off layer disposed over the charge receiving layer. An active layer is interposed between the ground plane and the charge receiving layer, the active layer including a plurality of microcapsules containing charged pigments. A system for writing information to electronic paper is also provided.

Abstract: An optical sensor system includes a source module and a detection module. The source module includes a source housing unit having a source window member and a source shielding member. The source module emits a detection signal through the source window member. The detection module includes a detection housing unit having a detection window member and a detection shielding member. The detection module is spaced apart from the source module. The detection module detects the detection signal emitted from the source module at the detection window member.

Abstract: One example includes a display device. The display device includes an electronic paper display imageable by receiving charges on an imaging surface of the electronic paper display. The display device includes an embedded chip to enable writing to the electronic paper display based on a successful authentication.