Abstract: A three-dimensional printing system for fabricating a three-dimensional article includes a resin vessel, a motorized build plate, an imaging bar, and a movement mechanism. The resin vessel is for containing a photocurable resin, the photocurable resin having an upper resin surface. The motorized build plate is for supporting the three-dimensional article in the photocurable resin. The imaging bar includes a plurality of light emitting devices arranged along a transverse axis for emitting light generally downwardly and a transparent sheet disposed below the plurality of light emitting devices. The transparent sheet has a lower surface to contact the resin and define a build plane below the upper surface of the resin. The movement mechanism is for imparting movement of the imaging bar along a scan axis.

Abstract: Methods of creating additive manufactured parts include providing a first composition in a vat, where the first composition is a liquid with a first viscosity. A build platform is placed adjacent to and submerged under a top surface of the first composition. A second composition is dispensed on the top surface, the second composition having a second viscosity and being dispensed in a shape area according to a part to be created. The top surface is illuminated to expose the first composition and second composition to light having a polymerization wavelength, thereby causing polymerization of at least one of the first composition or second composition. In some embodiments, the first composition is a base resin that is absent of a photoinitiator, and the second composition is a photoinitiator solution. The photoinitiator solution may have a second viscosity that is less than the first viscosity of the base resin.

Abstract: A three dimensional printing system includes a resin vessel, a light engine, a movement mechanism, a fixture, and a controller. The resin vessel is for containing a photocurable resin and has a lower portion with a transparent sheet. The light engine is configured to selectively project radiation up through the transparent sheet and over a build plane. The fixture is coupled to the movement mechanism and has a lower face that faces the transparent sheet. The controller is configured to operate the light engine to solidify a particle trapping sheet proximate to the build plane thereby trapping particles that extend upwardly from the transparent sheet into the build plane.

Abstract: A three-dimensional printing system for fabricating a three-dimensional article includes a resin vessel, a motorized build plate, an imaging bar, and a movement mechanism. The resin vessel is for containing a photocurable resin, the photocurable resin having an upper resin surface. The motorized build plate is for supporting the three-dimensional article in the photocurable resin. The imaging bar includes a plurality of light emitting devices arranged along a transverse axis for emitting light generally downwardly and a transparent sheet disposed below the plurality of light emitting devices. The transparent sheet has a lower surface to contact the resin and define a build plane below the upper surface of the resin. The movement mechanism is for imparting movement of the imaging bar along a scan axis.

Abstract: An example device, for sealing an ink developer unit in accordance with aspects of the present disclosure includes a rigid plate. The device also includes a first compliant sealing member disposed on a first side of the rigid plate to form a seal between the number of rollers of the ink developer unit and the rigid plate. The device also includes a second compliant sealing member disposed on a second side of the rigid plate to form a seal between the rigid plate and an end cap of the ink developer unit. The first compliant sealing member, the second compliant sealing member, or combinations thereof include a developer roller arm aligned with an interior portion of a developer roller face and to allow ink to contact the developer roller face.

Abstract: A three dimensional printing system includes a resin vessel, a light engine, a movement mechanism, a fixture, and a controller. The resin vessel is for containing a photocurable resin and has a lower portion with a transparent sheet. The light engine is configured to selectively project radiation up through the transparent sheet and over a build plane. The fixture is coupled to the movement mechanism and has a lower face that faces the transparent sheet. The controller is configured to operate the light engine to solidify a particle trapping sheet proximate to the build plane thereby trapping particles that extend upwardly from the transparent sheet into the build plane.

Abstract: A three dimensional printing system includes a print engine, a fixture, and a controller. The print engine further includes a vessel, a light engine, and a movement mechanism. The vessel is for containing a photocurable resin and has a lower portion with a transparent sheet defining a lower surface of the vessel. The light engine is configured to project radiation up through the transparent sheet over a lateral build plane which defines a maximum addressable lateral range of the light engine. The fixture has a lower face that faces downwardly. The controller is configured to: (1) position the lower face of the fixture at the build plane, and (2) operate the light engine and movement mechanism to solidify a particle trapping sheet proximate to the transparent sheet and substantially spanning the build plane and to thereby trap particles that are present along the build plane.

Abstract: Apparatus and methods are provided. A supply of ink within a flexible bag is located apart from a printer. A fluid conduit couples the supply of ink to the printer by way of a connecting head. The connecting head includes a pump driven by a mechanical actuator of the printer. Operation of the pump causes a flow of ink from the flexible bag to a printhead of the printer. Pump failure is detected and interpreted as an out-of-ink condition, and user notification and/or cessation of printing operations are automatically performed.

Abstract: An example device, for sealing an ink developer unit in accordance with aspects of the present disclosure includes a rigid plate. The device also includes a first compliant sealing member disposed on a first side of the rigid plate to form a seal between the number of rollers of the ink developer unit and the rigid plate. The device also includes a second compliant sealing member disposed on a second side of the rigid plate to form a seal between the rigid plate and an end cap of the ink developer unit. The first compliant sealing member, the second compliant sealing member, or combinations thereof include a developer roller arm aligned with an interior portion of a developer roller face and to allow ink to contact the developer roller face.

Abstract: A sealing device includes a base member configured to attach to an ink developer unit, a sealing member having a sealing surface configured to at least one of limit an unwanted flow of ink outside of the ink developer unit and conform to an outer surface of a respective roller, and a compliant member disposed between the base member and the sealing member such that the compliant member is configured to vary a sealing force along the sealing surface of the sealing member.

Abstract: A sealing device usable with an ink developer unit including a plurality of rollers and a plurality of end cap members includes a first replaceable compliant sealing member and a latch member. The first replaceable compliant sealing member has a plurality of replaceable seal exterior surfaces to form a seal between a first set of rollers of the plurality of rollers and one of the end cap members. The latch member has a closed state to maintain a sealing force on the first replaceable compliant sealing member and an open state to remove the sealing force on the first replaceable complaint sealing member.

Abstract: A sealing device usable with an ink developer unit including a plurality of rollers and a plurality of end cap members includes a first replaceable compliant sealing member and a latch member. The first replaceable compliant sealing member has a plurality of replaceable seal exterior surfaces to form a seal between a first set of rollers of the plurality of rollers and one of the end cap members. The latch member has a closed state to maintain a sealing force on the first replaceable compliant sealing member and an open state to remove the sealing force on the first replaceable complaint sealing member.

Abstract: A sealing device includes a base member configured to attach to an ink developer unit, a sealing member having a sealing surface configured to at least one of limit an unwanted flow of ink outside of the ink developer unit and conform to an outer surface of a respective roller, and a compliant member disposed between the base member and the sealing member such that the compliant member is configured to vary a sealing force along the sealing surface of the sealing member.

Abstract: Apparatus and methods are provided. A supply of ink within a flexible bag is located apart from a printer. A fluid conduit couples the supply of ink to the printer by way of a connecting head. The connecting head includes a pump driven by a mechanical actuator of the printer. Operation of the pump causes a flow of ink from the flexible bag to a printhead of the printer. Pump failure is detected and interpreted as an out-of-ink condition, and user notification and/or cessation of printing operations are automatically performed.

Abstract: A fluid ejection device includes a fluid chamber, a fluid restriction communicated with the fluid chamber, and a fluid channel communicated with the fluid restriction. The fluid restriction has a fluid restriction parameter defined as (2*W+2*H)*L/(H*W), wherein W is a width of the fluid restriction, H is a height of the fluid restriction, and L is a length of the fluid restriction. As such, the fluid restriction parameter is in a range of 1.5 to 5.75.

Abstract: Disclosed herein are method and systems for printing a reactive ink and a fixer or second reactive ink onto a substrate from a single orifice plate, wherein orifice plate comprising at least two orifices; wherein at least one orifice prints a first reactive ink, and other orifice prints a fixer or second reactive ink. The reactive inks and the fixer reacts to form a precipitate which soluble in at least one of the fixer or the inks.

Abstract: An inkjet ink comprising polymeric fluoro-polymeric additives providing enhanced pen and print quality performance.

Abstract: A fluid ejection device includes a fluid chamber, a fluid restriction communicated with the fluid chamber, and a fluid channel communicated with the fluid restriction. The fluid restriction has a fluid restriction parameter defined as (2*W+2*H)*L/(H*W), wherein W is a width of the fluid restriction, H is a height of the fluid restriction, and L is a length of the fluid restriction. As such, the fluid restriction parameter is in a range of 1.5 to 5.75.

Abstract: Disclosed herein are methods and systems for printing a reactive ink and a fixer or a second reactive ink onto a substrate from a single orifice plate. The reactive ink(s) and the fixer react to form a precipitate which is soluble in at least one of the fixer or the ink(s).