Abstract: A method for printing a three-dimensional tissue scaffold. An embodiment can include printing a first layer of scaffold fiber with a printer onto a base gel substrate; and disposing a first gel layer over the printed first layer. Another embodiment can include printing a first and second sacrificial fiber with a printer onto a base gel substrate; printing a first scaffold fiber between the first and second sacrificial fiber to form a printed first layer; and disposing a first gel layer over the printed first layer.

Abstract: A mixing method and device are disclosed. The mixing method includes providing a drop generating device including a first drop ejector, a second drop ejector and a collector. The mixing method also includes ejecting a plurality of drops of a first reactant from the first drop ejector and ejecting a plurality of drops of a second reactant from the second drop ejector and collecting the drops with the collector.

Abstract: A method of forming a lenticle on a substrate includes operating a plurality of inkjets to eject a plurality of ink drops of an optically transparent ink onto a surface of a substrate between a first printed line of an optically opaque ink and a second printed line of the optically opaque ink to form a lenticle from the optically transparent ink, the first printed line being formed substantially parallel to the second printed line with a separation between the first printed line and the second printed line corresponding to a predetermined width of a lenticle to be formed on the substrate.

Abstract: The present embodiments relate to methods of increasing ink crystallization.

Abstract: A method for image correction preserves edges in image data stored in a printing system. The method identifies edge image data values within a plurality of image data values and excludes the identified edge image data values from the dithering of the image data values.

Abstract: A method for printing a three-dimensional crystalline structure such as a chocolate layer wherein, after printing, the material has a desired crystal structure. An embodiment can include printing a liquid first layer of material with a printer onto a second layer of material having a crystal structure. Subsequently, the printed liquid first layer is processed to solidify the first layer. During the processing of the printed liquid first layer, the second layer functions as a crystal seed layer through physical contact with the printed liquid first layer and the second layer crystallizes with the crystal structure.

Abstract: A method comprises selecting a first and second datum stored in an array of image data and corresponding to a first and second defective inkjet ejector, the second defective inkjet ejector being within a search pattern positioned about the first datum, modifying the search pattern positioned about the first datum in response to detection of the second datum being within the search pattern positioned about the first datum, identifying a third datum stored in the array of image data and being within the modified search pattern positioned about the first datum, the third datum corresponding to a first functional inkjet ejector, modifying the third datum with reference to the first datum, and operating the first functional inkjet ejector with reference to the modified third datum to compensate for the first defective inkjet ejector being unable to eject ink corresponding to the first datum.

Abstract: A method for printing including preparing an image at a first resolution in a first direction, selecting pixels from the prepared image, reordering the selected pixels to create a translated image having a second resolution in the first direction, where the second resolution is different from the first resolution, and printing the translated image. Also included are a printing system and an article of computer readable code.

Abstract: A method and system for processing image data in an image processing device for a plurality of pixel positions within a plurality of scanlines. The method and system includes storing a starting stamp value and a plurality of delta stamp values for the scanline. The stored values being used to generate a pixel stamp value for an input pixel in the scanline, by adding a starting value or previous pixel stamp value and the stored delta stamp value for the input pixel. Further includes receiving an input pixel intensity value for the input pixel and determining an output pixel intensity value. Subsequently, if the output pixel intensity value for the input pixel is equal to a value for a dot or hole the delta stamp values for at least one pixel having a location previous or subsequent to the input pixel can be updated.

Abstract: A method processes image data for a color separation to reduce visible perception of misalignment of printheads in a plurality of serially arranged printheads. The method includes detecting cross-process edges in image values for objects in a color separation to be printed by a plurality of serially arranged printheads, and disproportionately mapping image values corresponding to the object in the color separation to one of the printheads in the plurality of serially arranged printheads.

Abstract: A mixing method is disclosed. The mixing method includes providing a drop generating device including a first drop ejector, a second drop ejector and a collector. The mixing method also includes ejecting a plurality of drops of a first reactant from the first drop ejector and ejecting a plurality of drops of a second reactant from the second drop ejector and collecting the drops with the collector.

Abstract: An ink set including at least two inks. A first ink includes an optional colorant, a first multi-functional monomer, a second multi-functional monomer that is different from the first multi-functional monomer, and a peroxide initiator comprising a thermal free radical initiator. A second ink includes an optional colorant, a first multi-functional monomer, a second multi-functional monomer that is different from the first multi-functional monomer, and an amine activator having a catalyst which catalyzes the homolytic cleavage of the thermal free-radical initiator at low temperatures into radicals. The first ink is free of the amine activator and the second ink is free of the peroxide initiator. The first multi-functional monomer and the second multi-functional monomer accelerate reaction kinetics through a Trommsdorff effect.

Abstract: A system provides an operator of a solid ink stick printer method with information regarding solid ink stick exception conditions detected in a solid ink printer. The system includes a solid ink stick identifier that obtains identification data from a solid ink stick and that generates an ink stick ejection signal in response to detection of a solid ink stick exception condition, and a solid ink stick exception controller configured to generate a message for display in response to the ink stick ejection signal. obtaining solid ink stick identification data from a solid ink stick inserted into a solid ink printer, detecting a solid ink stick exception condition, generating an ink stick ejection signal in response to the detected solid ink stick exception condition, and generating a message for display in response to the ink stick ejection signal.

Abstract: A method for image correction preserves edges in image data stored in a printing system. The method identifies edge image data values within a plurality of image data values and excludes the identified edge image data values from the dithering of the image data values.

Abstract: A method comprises selecting a first and second datum stored in an array of image data and corresponding to a first and second defective inkjet ejector, the second defective inkjet ejector being within a search pattern positioned about the first datum, modifying the search pattern positioned about the first datum in response to detection of the second datum being within the search pattern positioned about the first datum, identifying a third datum stored in the array of image data and being within the modified search pattern positioned about the first datum, the third datum corresponding to a first functional inkjet ejector, modifying the third datum with reference to the first datum, and operating the first functional inkjet ejector with reference to the modified third datum to compensate for the first defective inkjet ejector being unable to eject ink corresponding to the first datum.

Abstract: A method processes image data in a color separation to attenuate printing defects arising from misalignment of serially arranged printheads that eject ink for the color separation. The method includes processing image values of the color separation with a first rendering process that corresponds to one printhead in a plurality of serially arranged printheads for printing the color separation, processing the image values of the color separation with a second rendering process that differs from the first rendering process for at least one other printhead in the plurality of serially arranged printheads for printing the color separation, generating firing signals for the one printhead from the rendered image values generated by the first rendering process, and generating firing signals for the at least one other printhead from the rendered image values generated by the second rendering process.

Abstract: An ink set comprising at least two inks. A first ink includes an optional colorant, a first multi-functional monomer, a second multi-functional monomer that is different from the first multi-functional monomer, and a peroxide initiator comprising a thermal free radical initiator. A second ink includes an optional colorant, a first multi-functional monomer, a second multi-functional monomer that is different from the first multi-functional monomer, and an amine activator comprising a catalyst which catalyzes the homolytic cleavage of the thermal free-radical initiator at low temperatures into radicals. The first ink is free of the amine activator and the second ink is free of the peroxide initiator. The first multi-functional monomer and the second multi-functional monomer accelerate reaction kinetics through a Trommsdorff effect.

Abstract: A method identifies ink supplied to a printer. The method includes generating an image of an ink supply installed in a printer, comparing the image of the ink supply to a stored reference image of at least one ink supply, and activating an indicator in response to the generated image corresponding to the stored reference image.

Abstract: A method is implemented to deliver a solid ink stick from a single insertion port to a corresponding feed channel to help ensure that each feed channel in a plurality of feed channels contains only ink sticks corresponding to the feed channel. The method includes receiving solid ink sticks in a single insertion port, identifying each ink stick received in the single insertion port, and transporting each identified ink stick from the single insertion port to one feed channel in a plurality of feed channels to enable delivery of the identified ink stick to the melting assembly appropriate for the identified ink stick.

Abstract: A device and method is provided for breaking up undesirable patterns in vector error diffusion when the sum of inputs is near fraction values of the total input range. In the method, the value of the sum is calculated modulo the maximum input value. The mod value tendency to produce limit cycles is then determined for multiple planes in a manner similar to that for an individual plane. The threshold process for the vector calculation can then be modified to break up the cycles that occur in the combinations of the multiple colors. Typically, the largest of the individual plane modifications and the vector sum mod value is used for threshold modification. At least two different types of threshold modifications are possible: (1) random or psuedo-random noise address to the threshold; and (2) non-contiguous regions of threshold.