摘要:
Ink jet printers, ink stream modulators, and methods to generate droplets from an ink stream are disclosed. An example method to generate droplets from an ink stream includes generating a stream of ink with an inkjet nozzle and modulating the stream of ink into a plurality of droplets by generating an alternating electrical field having a frequency based on a permittivity of the ink to cause a dielectrophoretic effect.
摘要:
Ink jet printers, ink stream modulators, and methods to generate droplets from an ink stream are disclosed. An example method to generate droplets from an ink stream includes generating a stream of ink with an inkjet nozzle and modulating the stream of ink into a plurality of droplets by generating an alternating electrical field having a frequency based on a permittivity of the ink to cause a dielectrophoretic effect.
摘要:
Printers, methods, and apparatus to reduce aerosol are disclosed. An example apparatus to reduce aerosol includes a print head (102) to generate droplets (314-320) and aerosol (322-326), and to direct the droplets (314-320) toward a print substrate (104), a first corona wire (108) to generate first ions (340, 344) having a first electrical polarity to direct the aerosol (322-326) toward the print substrate (104), and a second corona wire (110) to generate second ions (340, 344) to direct the aerosol (322-326) toward the print substrate (104), wherein the second ions (340, 344) have a second electrical polarity that is opposite the first electrical polarity.
摘要:
Measurement devices, systems, and methods to measure a high field conductivity of a fluid are provided herein. The measurement device includes a fluid cell, a pair of electrodes, a voltage switch, and a measurement unit. The fluid cell is on an inclined plane to receive the fluid. The pair of electrodes are connected to the fluid cell. The pair of electrodes are spaced apart from one another to receive the fluid therebetween and positioned parallel to one another to pass an electrical current therethrough. The power unit provides a high voltage power supply to one electrode of the pair of electrodes. The measurement unit measures the electrical current that passes between the pair of electrodes through the fluid.
摘要:
An ink composition has controlled conductivity, and a digital printing system and a method of printing an ink employ an offset inkjet printing platform. The ink composition includes pigment particles dispersed in an oil-based dielectric carrier fluid with an oil-soluble dispersant. A concentration of dispersant is a fraction of a concentration of the pigment particles sufficient to render an electrical conductivity of the ink composition less than 100 pico Siemens per centimeter (pS/cm). The printing system includes an ink having an electrical conductivity less than or equal to about 300 pS/cm, an inkjet print head, a transfer medium, a developer, a remover and an image transferer. In the method of printing, the ink is nonelectrostatically jetted to the transfer medium, and developed into a fixed image. A portion of a supernatant is removed from the fixed image, and the fixed image is transferred to a media substrate.
摘要:
An ink composition has controlled conductivity, and a digital printing system and a method of printing an ink employ an offset inkjet printing platform. The ink composition includes pigment particles dispersed in an oil-based dielectric carrier fluid with an oil-soluble dispersant. A concentration of dispersant is a fraction of a concentration of the pigment particles sufficient to render an electrical conductivity of the ink composition less than 100 pico Siemens per centimeter (pS/cm). The printing system includes an ink having an electrical conductivity less than or equal to about 300 pS/cm, an inkjet print head, a transfer medium, a developer, a remover and an image transferer. In the method of printing, the ink is nonelectrostatically jetted to the transfer medium, and developed into a fixed image. A portion of a supernatant is removed from the fixed image, and the fixed image is transferred to a media substrate.
摘要:
Apparatus for capturing aerosols are disclosed. An example apparatus described herein includes a corona wire, and a nonconductive housing comprising a first cavity to expose a first portion of the corona wire, a second cavity to expose a second portion of the corona wire, and a chamber between the first and second cavities. A third portion of the corona wire is located within the chamber between the first and second portions of the corona wire.
摘要:
Apparatus for capturing aerosols are disclosed. An example apparatus described herein includes a corona wire, and a nonconductive housing comprising a first cavity to expose a first portion of the corona wire, a second cavity to expose a second portion of the corona wire, and a chamber between the first and second cavities. A third portion of the corona wire is located within the chamber between the first and second portions of the corona wire.
摘要:
Printers, methods, and apparatus to form an image on a substrate are disclosed. An example disclosed charge roller includes a dielectric outer layer (104) comprising an inner surface (106) and an outer surface (108), the outer surface (108) to be charged by a first external surface and to discharge onto a second external surface, and the dielectric outer layer (104) to substantially prevent charge transfer between the inner surface (106) and the outer surface (108), and an electrically conductive inner layer (102) to direct electrical charge toward and away from the inner surface (106) of the outer layer (104), and to be coupled to an electrical source to control a transfer of the electrical charge.
摘要:
Printers, methods, and apparatus to form an image on a substrate are disclosed. An example disclosed charge roller includes a dielectric outer layer (104) comprising an inner surface (106) and an outer surface (108), the outer surface (108) to be charged by a first external surface and to discharge onto a second external surface, and the dielectric outer layer (104) to substantially prevent charge transfer between the inner surface (106) and the outer surface (108), and an electrically conductive inner layer (102) to direct electrical charge toward and away from the inner surface (106) of the outer layer (104), and to be coupled to an electrical source to control a transfer of the electrical charge.