Abstract: A method may include etching a number of holes into a carrier wafer layer to form a plurality of filters in the carrier wafer layer, pattering a chamber layer over a first side of the carrier wafer layer to form chambers above each filter formed in the carrier wafer layer, forming a layer over the chamber layer, grinding a second side of the carrier wafer layer to expose the number of holes etched into the carrier wafer layer, and bonding a molded substrate to the carrier wafer layer opposite the chamber layer.

Abstract: Example implementations relate to a frame to removably attach bags. For example, an apparatus includes a frame, at least one frame wheel connected to the frame, and an extender device attachable to the frame. The extender device includes a platform, at least one platform wheel connected to the platform, and a first extender connector device on the platform to removably attach the platform to the frame and to removably attach the platform to a first bag of a first size. The apparatus also includes a frame connector device on the frame to removably attach the first bag to the frame.

Abstract: In a three-dimensional printing method example, a metallic build material is applied. A positive masking agent is selectively applied on at least a portion of the metallic build material. The positive masking agent includes a radiation absorption amplifier that is compatible with the metallic build material. The metallic build material is exposed to radiation from a spatially broad, high energy light source to melt the portion of the metallic build material in contact with the positive masking agent to form a layer. The radiation absorption amplifier i) has an absorbance for the radiation that is higher than an absorbance for the radiation of the metallic build material, or ii) modifies a surface topography of the at least the portion of the metallic build material to reduce specular reflection of the radiation off of the at least the portion of the metallic build material, or both i) and ii).

Abstract: A method is described in which sets of corresponding colorimetric values are obtained. In a set, a colorimetric value is associated with a device color. A number of device colors are selected according to the color differences between colorimetric values associated with the same device color. A color calibration pattern is elaborated for a printer to be calibrated using the selected device colors and calibration is performed using the sets of colorimetric values.

Abstract: A print head monitoring system includes a fly-by spitting station, the fly-by spitting station receiving droplet of printing agent from a print head when the print head passes over the fly-by spitting station, and a drop detector which is located at the fly-by spitting station.

Abstract: A method for additive manufacturing includes: forming a three-dimensional object by: depositing a layer of a powdered build material onto a surface; selectively depositing a liquid comprising a susceptor onto the layer of the powdered build material in a pattern; and heating the object by electromagnetic radiation with a microwave or radio wave frequency, in an atmosphere including oxygen, to a temperature sufficient to sinter the powdered build material.

Abstract: Examples disclosed herein relate to 3D printer fresh and recycled powder supply management. In one implementation, a processor estimates fresh and recycled powder use and recycled powder creation by a 3D printer based on a set of print jobs.

Abstract: A printing device comprises a droplet generator for generating a droplet of printing fluid, a droplet detector for detecting a generated droplet of printing fluid, and a controller. The droplet detector is moveable along an axis. The controller is to cause the droplet detector to be positioned at a known location along the axis, cause the droplet generator to generate a droplet, receive a measurement signal from the droplet detector, and determine a location of the droplet generator based on the received measurement signal and the known location.

Abstract: The present subject matter describes a system for pumping ink. In an example implementation, the system includes a piston assembly having a lower chamber and an upper chamber. The lower chamber has an inlet port to receive ink. The upper chamber has a passage to receive ink from the lower chamber and an outlet port to dispense ink. The upper chamber is enclosed by a bellow. An actuating member is engaged with the piston assembly. The actuating member is configured to linearly move the piston assembly. The piston assembly is configured to compress and relax the bellow by the linear movement to pump ink from the lower chamber to the upper chamber and from the upper chamber to the outlet port.

Abstract: A 3D object is additively formed via arranging non-conductive material relative to a receiving surface. During additive formation of the 3D object, a conductive channel is formed as part of the 3D object. In some instances, non-destructive fracture sensing is performed via measurement of an electrical parameter of the conductive channel.

Abstract: In an example implementation, a method of tracking a mobile device includes determining by a tracked device, that a pairing status between the tracked device and a command device has changed from a paired status to an unpaired status. A timer is started on the tracked device in response to determining the unpaired status, and in response to the timer reaching a threshold time, a distress packet is transmitted from the tracked device that indicates the tracked device is lost.

Abstract: In an example, a printhead maintenance apparatus includes a pump, a current monitor and processing circuitry. The pump may be provided to increase a pressure in a printhead, and the current monitor may monitor a current consumption of the pump. The processing circuitry may determine a rate of change of current consumption of the pump, and compare the rate of change of current consumption to a predetermined threshold.

Abstract: There is disclosed a non-transitory machine-readable medium encoded with instructions executable by a processor and comprising instructions to: control print apparatus to print a test pattern 11 on a test region of a print medium 4; receive test data relating to the test pattern 11 printed on the print medium 4 from a sensor 8; analyse the test data with reference to baseline data to determine if the test pattern 11 satisfies a print quality criterion; output an instruction to operate the print apparatus in a first mode, in which a pre-printing treatment is not applied to the print medium, in response to determining that the test pattern 11 satisfies the print quality criterion, the pre-printing treatment comprising wiping a printing surface of the print medium with a wiper element 10, 20; and output an instruction to operate the print apparatus in a second mode, in which the pre-printing treatment is applied to the print medium 4, in response to determining that the test pattern 11 satisfies the print qualit

Abstract: A housing may include sidewalls and a base extending between and supported by the sidewalls. The base and the sidewalls form a cavity. The housing support they substrate. The substrate supports a surface enhanced luminescence stage between the substrate and the base.

Abstract: A transform wrapper is stored on a memory device and the memory device may be included in a printer cartridge. The transform wrapper may dynamically build a transform map for a printer based on metadata stored at the memory device. The metadata may indicate at least one of a type of depositing material, transform map, print media and printer.

Abstract: An image digitizing apparatus has an image digitizing sensor to read an image from media passing the image digitizing sensor, and a transport to move the media past the image digitizing sensor. The transport includes a first driven transport element, and a second driven transport element biased towards the first driven transport element. The first driven transport element and the second driven transport element receive the media therebetween.

Abstract: An activatable SEL sensor stage may include a substrate, cation metal-based material masses supported by the substrate and isolated from one another and dielectric capping layer over the cation metal-based material masses to inhibit oxidation of the cation metal-based material masses.

Abstract: An apparatus may include a frame layer having a recess, a substrate secured to the frame layer at least partially across the recess and a surface enhanced luminescence (SEL) stage supported by the substrate within the recess.

Abstract: The present disclosure is drawn to image-receiving compositions that can include an aqueous liquid vehicle and solids dispersed in the aqueous liquid vehicle. The solids can include from 60 wt % to 94 wt % pigment filler, from 0.5 wt % to 15 wt % multivalent salt, from 1 wt % to 10 wt % water-soluble polymer, from 2 wt % to 15 wt % latex, and from 2 wt % to 15 wt % synthetic micronized cellulose. The synthetic micronized cellulose can have a bulk density of from 150 grams per liter to 200 grams per liter, and a surface area of 0.1 m2/g to 10 m2/g.

Abstract: Web server based color management hosted by a web server is provided enabling a production device to produce a print job with a similar color appearance as a reference device. The web server receives a production device color management profile and a reference device color management profile. The web server creates an output color management profile based on the color management profile of the production device and the color management profile of the reference device. The output color management profile maps device-independent color values associated in the color management profile of the reference device to device-specific color values for colors reproducible by the production device.