摘要:
An inkjet printhead, that includes a plurality of nozzle bores from which streams of ink droplets having selectable first and second volumes are emitted; a droplet deflector for deflecting the ink droplets having first and second volumes into first and second paths respectively, the droplet deflector producing a corresponding plurality of physically separate streams of gas, each stream of gas directed on a corresponding one of the streams of ink droplets; and an ink gutter positioned to catch the ink droplets moving along one of the first or second paths. In addition to a method for selectively controlling the ink droplets with the aforementioned inkjet printhead.
摘要:
An apparatus for printing an image is provided. The apparatus includes a source of ink. A droplet forming mechanism is operable in a first state to form droplets from the source having a first volume traveling along a first desired path and in a second state to form droplets from the source having a second volume traveling along the first desired path. The droplet forming mechanism is positioned proximate the source. A first system selectively applies a first force to the source such that selected droplets formed from the source by the droplet forming mechanism travel along a second desired path. The first system is positioned proximate the source. A second system applies a second force to the droplets traveling along at least one of the first desired path and the second desired path. The second force is applied in a direction such that the droplets having the first volume diverge from the droplets having the second volume.
摘要:
A continuous ink jet apparatus is provided. The printhead includes a nozzle array with portions of the nozzle array defining a length dimension. A drop forming mechanism is positioned relative to the nozzle array. The drop forming mechanism is operable in a first state to form ink drops having a first volume travelling along a path and in a second state to form ink drops having a second volume travelling along the path. A system applies force to the ink drops travelling along the path. The force is applied in a direction such that the ink drops having the first volume diverge from the path and at least one of the ink drops having the first volume and the ink drops having the second volume are displaced relative to the length dimension.
摘要:
For an inkjet printhead (10) with integral compensation for misdirection of ink drops (37) ejected through at least one nozzle (24) of the printhead (10), a system and method of modifying the nozzle cavity space (32a) so as to compensate for the effects of defects in the printhead (10) by altering the direction the ejected ink drops (37). The inkjet printhead (10) comprises at least one reservoir (28) integrated within the membrane (30). The inkjet printhead (10) also comprises a channel (38) extending from the reservoir (28) and terminating in the nozzle cavity (32). A hardening substance (40) within the reservoir (28) and channel (38) is a plastic material having a high thermal expansion coefficient. An internal heater (48) within the reservoir (28) and adjacent the hardening substance (40) is adapted to cause the plastic material (40) to flow in order to form a protrusion (44) of plastic material (40) within the nozzle cavity space (32a). Alternatively, the plastic material (40) can be recessed within the channel (38). Thus, the hardening substance (40) is adapted to internally alter the nozzle cavity space (32a) and cause ink (34) ejected from the nozzle opening (26) to be deflected with regard to a desired amount of compensation.
摘要:
A method of printing includes associating a pixel area of a recording medium with a nozzle and a time interval during which a fluid drop ejected from the nozzle can impinge the pixel area of the recording medium; dividing the time interval into a plurality of subintervals; grouping some of the plurality of subintervals into blocks; associating one of two labels with each block, the first label defining a printing drop, the second label defining non-printing drops; associating no drop forming pulse between subintervals of each block having the first label; associating a drop forming pulse between each subinterval of each block having the second label; associating a drop forming pulse between other subintervals, the drop forming pulse being between each pair of consecutive blocks; and causing drops to be ejected from the nozzle based on the associated drop forming pulses.
摘要:
An apparatus for printing an image is provided. The apparatus includes an ink droplet forming mechanism operable to selectively create a stream of ink droplets having a plurality of volumes traveling along a first path. A droplet deflector is positioned at an angle with respect to the stream of ink droplets. The droplet deflector includes a gas flow operable to interact with the stream of ink droplets such that ink droplets having one of the plurality of volumes begin traveling along a second path and ink droplets having another of the plurality of volumes begin traveling along a third path. At least a portion of a catcher including a porous material is at least partially positioned in one of the first, second, and third paths.
摘要:
A continuous inkjet printing apparatus is provided. The apparatus includes a printhead having a two dimensional nozzle array. The two dimensional nozzle array includes a first nozzle row being disposed in a first direction and a second nozzle row being disposed displaced and offset relative to the first nozzle row. A drop forming mechanism is positioned relative to the nozzle rows and is operable in a first state to form drops having a first volume travelling along a path and in a second state to form drops having a second volume travelling along the same path. A system applies force to the drops travelling along the path with the force being applied in a direction such that the drops having the first volume diverge from the path.
摘要:
For an inkjet printhead (10) having at least one nozzle (24) and a nozzle opening (26) in the nozzle (24), a disk (28) having an off-center aperture (38) about the disk axis (X, Y) positioned over the nozzle opening (26), a system and method of compensating for the effects of defects in the inkjet printhead (10) to alter the direction of ink drops (37) ejected from the nozzle (24). Initially, the printhead (10) is tested to determine the amount of compensation desired in the direction of ink (34) ejected from the nozzle opening (26). The method comprises the step of applying heat to at least one finger-like actuator (42), causing the thermal actuator (42) to deform semi-permanently. The method further comprises the step of sliding the disk (28) over the nozzle (24) so that the off-center aperture (38) traverses the nozzle opening (26) and causes the ink (34) ejected from the nozzle opening (26) to be deflected with regard to the desired amount of compensation. Once the disk (28) has been adjusted accordingly, the application of heat is ceased, causing the thermal actuator (42) to hold the disk (28) in the desired position.
摘要:
A manner of permanent alteration of an ink jet print head (10) for correction of misdirection of emitted or ejected ink drops. The ink jet print head (10) has a surface (14) defining at least one orifice or nozzle (16) therethrough for emitting or ejecting ink droplets from an ink source onto a printing or recording medium and at least one element (28,30,34,44,48,50) disposed around the orifice or nozzle (16) and selectably removable for altering a directional path of the ejected or emitted ink droplets, correction of misdirection of emitted or ejected ink droplets from the at least one orifice or nozzle (16) involving asymmetrically removing a portion of the element (28,30,34,44,48,50) disposed around the orifice or nozzle (16).
摘要:
Both an inkjet printer and method are provided for controlling inkjet printing on a receiver. The inkjet printer includes a printhead having at least one nozzle for ejecting a stream of ink droplets, a droplet deflector for generating a flow of gas that impinges on the stream of ejected droplets to deflect the trajectories of the droplets, and a controller for varying the velocity of the gas flow in order to vary the degree of trajectory deflection so the droplets intended to print on a particular pixel in the receiver land on top of one another without elongation despite relative movement between the printhead and the receiver. The printer provides improved image quality and productivity while reducing image artifacts.