Abstract: A method includes ejecting a plurality of drops of a build material from a nozzle of a 3D printer. The build material cools and solidifies after being ejected to form a 3D object. The method also includes controlling an oxidation of the drops, the 3D object or both to create different oxidation levels in first and second portions of the 3D object.

Abstract: A method includes ejecting a plurality of drops of a build material from a nozzle of a 3D printer. The build material cools and solidifies after being ejected to form a 3D object. The method also includes controlling an oxidation of the drops, the 3D object or both to create different oxidation levels in first and second portions of the 3D object.

Abstract: A three-dimensional (3D) metal object manufacturing apparatus is configured to eject melted metal drops from an ejector head at different velocities to form different portions of metal object layers with different measurable values of a same physical property. The different velocities are achieved by operating the ejector head with two different electrical voltages. The greater voltage that achieves the higher velocity is about 25% greater than the voltage used to achieve the lesser velocity. By operating the ejector head with the two different voltages different portions of the object can be formed with different physical property characteristics.

Abstract: A three-dimensional (3D) printer includes an ejector and a heating element configured to heat a solid printing material in the ejector, thereby causing the solid printing material to change to a liquid printing material within the ejector. The 3D printer also includes a coil wrapped at least partially around the ejector. The 3D printer also includes a power source configured to supply one or more pulses of power to the coil, which cause one or more drops of the liquid printing material to flow out of the ejector through a nozzle of the ejector. The 3D printer also includes a gas-controlling device configured to control a gas in the 3D printer.

Abstract: A three-dimensional (3D) printer includes an ejector and a heating element configured to heat a solid printing material in the ejector, thereby causing the solid printing material to change to a liquid printing material within the ejector. The 3D printer also includes a coil wrapped at least partially around the ejector. The 3D printer also includes a power source configured to supply one or more pulses of power to the coil, which cause one or more drops of the liquid printing material to flow out of the ejector through a nozzle of the ejector. The 3D printer also includes a gas-controlling device configured to control a gas in the 3D printer.

Abstract: A system for printing at least one stretchable ink on a thermoformable substrate including an unwinder arranged to feed the thermoformable substrate from a first roll into a web drive subsystem, a surface energy modification device arranged to alter a substrate surface energy to enhance wetting and adhesion of the at least one stretchable ink to the thermoformable substrate, at least one printhead array arranged to deposit the at least one stretchable ink on the thermoformable substrate, at least one radiation curing device arranged to cure the at least one stretchable ink on the thermoformable substrate, a sensor array arranged to monitor the at least one stretchable ink on the thermoformable substrate, and a rewinder arranged to receive the thermoformable substrate and to form the thermoformable substrate into a second roll.

Abstract: A system and method are provided for implementing a process by which printed rolls of substrate material web have additional material layers interleaved between the rolled material web layers to substantially eliminate back transfer or roll offset of printed images on the back sides of the rolled material substrates. In a process for pre-printing thermoforming grade plastic materials to produce rolls of substrate material for use in a thermoforming process, ink compositions, particularly adapted for the thermoforming process, are deposited on substantially continuous webs of substrate material. The webs of substrate material are then re-rolled with separate layers of low surface energy substrate material interleaved between the layers of the printed substrate material in order to substantially eliminate imaging defects produced by back transfer of printed images on to the backs of layers of the printed substrate material stored in rolls.

Abstract: A method for applying flame treatments to a print surface on an object in an inkjet printer includes activating a hydrogen torch within the inkjet printer to generate a flame through a nozzle of the hydrogen torch and operating an actuator to move at least one of the print surface or the nozzle in a predetermined direction to apply the flame from the nozzle to the print surface. The method further includes adjusting a rate of fuel flow to the nozzle of the hydrogen torch to change a thermal output level of the flame with reference to a change in distance between the nozzle of the hydrogen torch and the print surface during the operating of the actuator.

Abstract: A system for printing at least one stretchable ink on a thermoformable substrate having a first surface and a second surface opposite the first surface, the system including an unwinder arranged to feed the thermoformable substrate from a first roll into a web drive subsystem, a surface energy modification device arranged to alter a substrate surface energy of the first surface to enhance wetting and adhesion of the at least one stretchable ink to the thermoformable substrate, at least one first full width printhead array arranged to deposit a first portion of the at least one stretchable ink on the first surface of the thermoformable substrate, at least one second full width printhead array arranged to deposit a second portion of the at least one stretchable ink on the first surface of the thermoformable substrate, at least one radiation pinning device positioned proximate the second surface and arranged to partially cure the first portion of the at least one stretchable ink on the thermoformable substrate p

Abstract: A real-time surface energy treatment system for a printable substrate including a surface energy modification device arranged to alter a substrate surface energy of the printable substrate to enhance wetting and adhesion of an ink to the printable substrate, a full width array sensor arranged to measure at least one print quality characteristic of the ink on the substrate, and a system control in communication with the surface energy modification device and the full width array sensor and arranged to adjust an input power to the surface energy modification device based on the at least one print quality characteristic.

Abstract: A system for printing at least one stretchable ink on a thermoformable substrate having a first surface and a second surface opposite the first surface, the system including an unwinder arranged to feed the thermoformable substrate from a first roll into a web drive subsystem, a surface energy modification device arranged to alter a substrate surface energy of the first surface to enhance wetting and adhesion of the at least one stretchable ink to the thermoformable substrate, at least one first full width printhead array arranged to deposit a first portion of the at least one stretchable ink on the first surface of the thermoformable substrate, at least one second full width printhead array arranged to deposit a second portion of the at least one stretchable ink on the first surface of the thermoformable substrate, at least one radiation pinning device positioned proximate the first surface and arranged to partially cure the first portion of the at least one stretchable ink on the thermoformable substrate pr

Abstract: A system and method are provided for implementing a process by which printed rolls of substrate material web have additional material layers interleaved between the rolled material web layers to substantially eliminate back transfer or roll offset of printed images on the back sides of the rolled material substrates. In a process for pre-printing thermoforming grade plastic materials to produce rolls of substrate material for use in a thermoforming process, ink compositions, particularly adapted for the thermoforming process, are deposited on substantially continuous webs of substrate material. The webs of substrate material are then re-rolled with separate layers of low surface energy substrate material interleaved between the layers of the printed substrate material in order to substantially eliminate imaging defects produced by back transfer of printed images on to the backs of layers of the printed substrate material stored in rolls.

Abstract: A process and device for removing a solid ink mask printed onto a substrate is disclosed. The substrate is bent around a bar set perpendicular to the substrate, causing the mask to flake off the substrate. The process permits fast removal of solid ink masks.

Abstract: A process and device for removing a solid ink mask printed onto a substrate is disclosed. The substrate is bent around a bar set perpendicular to the substrate, causing the mask to flake off the substrate. The process permits fast removal of solid ink masks.

Abstract: A printing device is configured to adjust the angle of a metering blade within a predetermined range of angles to compensate for wear in the blade over time or for other causes of inconsistency. The angle of the metering blade is selected by a controller which operates an actuator to move a moveable member to adjust the angle of the metering blade and regulate the thickness of a release agent layer on a moving imaging member.

Abstract: A drum maintenance system for use in an imaging device includes a reservoir having a supply of release agent. An applicator is configured to receive release agent from the reservoir and to apply the release agent to an imaging surface of an imaging device. A metering blade is positioned to meter the release agent on the imaging surface applied by the applicator. The metering blade is arranged in doctor mode with respect to the imaging surface and includes a tip positioned adjacent the imaging surface. The tip has a square portion positioned proximate the imaging surface and a beveled portion opposite the imaging surface.

Abstract: A printing device is configured to adjust the angle of a metering blade within a predetermined range of angles to compensate for wear in the blade over time or for other causes of inconsistency. The angle of the metering blade is selected by a controller which operates an actuator to move a moveable member to adjust the angle of the metering blade and regulate the thickness of a release agent layer on a moving imaging member.

Abstract: A drum maintenance system for use in an imaging device includes a reservoir having a supply of release agent, and an applicator configured to receive release agent from the reservoir and to apply the release agent to an intermediate imaging surface of an imaging device. A first metering blade is positioned in wiper mode at a first position adjacent the intermediate imaging surface and configured to meter the release agent on the intermediate imaging surface applied by the applicator. A second metering blade is positioned in wiper mode at a second position adjacent the intermediate imaging surface.

Abstract: A drum assembly in a printing machine comprises a rotating drum having a surface and an applicator assembly for applying oil onto the surface. The applicator assembly includes a liquid supply containing a supply of oil, a distributor connected to the liquid supply for distributing the oil, and an applicator having an area for receiving oil from the distributor and an application edge. The distributor and the applicator are configured so that oil distributed on the area of the applicator forms a meniscus at the application edge. The application edge is positioned closely adjacent but not in contact with the surface of the drum at a distance sufficiently close to the surface so that the surface contacts the meniscus to withdraw oil from the applicator onto the surface.

Abstract: A release agent applicator applies release agent to an imaging drum and absorbs release agent metered from the drum to extend the operational life of an image drum maintenance unit. The applicator includes a reservoir for storing release agent, the reservoir having a plurality of perforations for enabling release agent to seep from the reservoir, a containment membrane for wicking release agent from the perforations of the reservoir, and a delivery layer for delivering release agent from the containment membrane to an imaging drum, the delivery layer having pores in a range of about 50 ?m to about 200 ?m.