Abstract: Helmets and methods for manufacturing a helmet are described. An example helmet includes a shell and a shock absorbing liner attached to the shell. The shock absorbing liner includes a cavity. The helmet a shock absorbing insert formed of a material different than the material of the shock absorbing liner. The cavity is configured to retain the shock absorbing insert.

Abstract: In some examples, an apparatus can include a syringe body including an electrical interface at a side surface of the syringe body, an interface at an end of the syringe body including an output at a distal surface of the syringe body, a print material particles reservoir located in the syringe body, and a structure to adapt a volume of the print material particles reservoir to move print material particles out of the print material particles reservoir through the output, where in response to the volume adapting structure moving from a first position to a second position, a signal is transmitted by the electrical interface.

Abstract: Examples described herein relate to a supply valve consistent with the disclosure. For instance, a supply valve to supply print particles to a receptacle, the supply valve may comprise a print particle exit, a print particle entrance perpendicular to the print particle exit, and a liner adjacent to the print particle exit, where the liner is to wipe print particles, when present, from the supply valve responsive to the transition of the supply valve between a closed position and an open position.

Abstract: An example print material replenishment device includes a container to contain print material, a dispensing end to engage a fill port of a printing device, the dispensing end including an opening that is offset from a center axis of the container, and a rotatable cover coupled to the dispensing end, the rotatable cover to expose the opening of the dispensing end based on a rotation of the print material replenishment device.

Abstract: Examples described herein relate to a print particle refill device consistent with the disclosure. For instance, a print particle refill device may comprise a cap disk to form a barrier between the print particle refill device and a receptacle, a first liner adjacent to the cap disk to seal print particles in the print particle refill device, and an actuating liner to wipe print particles, when present, from the receptacle.

Abstract: Examples of a print particle transfer device are described herein. Some examples of the print particle transfer device include a print particle vessel to contain print particles. In some examples, the print particle transfer device also includes a plunger with a fibrous seal element to engage an inside surface of the print particle vessel. The fibrous seal element seals an interface between the plunger and the inside surface of the print particle vessel to prevent escape of the print particles at the interface during movement of the plunger within the print particle vessel.

Abstract: Examples of a print particle replenishment device are described herein. Some examples of the print particle replenishment device may include an interfacing portion. Some examples of the interfacing portion may include a ramp to actuate a hinging door. In some examples, the hinging door may be on a host device receptacle.

Abstract: Examples of a print a print particle replenishment device are described. In some examples, a print particle replenishment device includes a rotating member to rotate about a central axis of the print particle replenishment device. In some examples, the rotating member includes an opening offset from the central axis. In some examples of a print particle replenishment device, a nozzle is offset from the central axis, where the nozzle is to slide with respect to an interior plane of the rotating member to align with the opening to transfer print particles through the nozzle and opening when in an open position. In some examples, a print particle replenishment device includes an extension that protrudes with respect to the opening to engage a port cover of a host device to move the port cover to open a port for replenishment at rotation.

Abstract: An Electrically Switchable Bragg Grating (ESBG) despeckler device comprising at least one ESBG element recorded in a hPDLC sandwiched between transparent substrates to which transparent conductive coatings have been applied. At least one of said coatings is patterned to provide a two-dimensional array of independently switchable ESBG pixels. Each ESBG pixel has a first unique speckle state under said first applied voltage and a second unique speckle state under said second applied voltage.

Abstract: An example print material replenishment device includes a container to contain print material, a dispensing end to engage a fill port of a printing device, the dispensing end including an opening that is offset from a center axis of the container, and a rotatable cover coupled to the dispensing end, the rotatable cover to expose the opening of the dispensing end based on a rotation of the print material replenishment device.

Abstract: A modular audio system which includes an acoustic module configured to be removably engaged with a head-worn peripheral device. In some examples, the head-worn peripheral device is a pair of eyeglass frames and the acoustic module is configured to removably secure to a socket arranged on the inside face of the temples of the eyeglasses. The acoustic module can slidingly, pivotably, and/or magnetically engage with the socket such that, when secured, the acoustic module is configured to generate acoustic energy in the form of audible sound proximate a user's ear while the user is wearing the head-worn peripheral device. In other examples, the temples of the head-worn peripheral device are configured to slidingly engage with a sleeve, where the sleeve includes a pocket configured to slidingly engage with the acoustic module.

Abstract: An audio system and methods for detecting proximity between or engagement between a removable open-ear acoustic module and a host device. Upon detection of proximity or engagement, the audio system may adjust at least one device setting of the devices in the system. In some examples, the devices of the audio system are capable of obtaining specific identifying information about the other devices, and can be configured to adjust the at least one device setting based on device identity. For example, adjusting the device settings can include an adjustment to power state of the open-ear acoustic module, an audio equalization (EQ) setting, a volume setting, a bass level setting, a treble level setting, an Active Noise Reduction (ANR) setting, a user profile setting, selection of an algorithm of a plurality of algorithms related to data collection, a sensor calibration setting, and a user interface control setting.

Abstract: In some examples, a print materials container can include a dispense mechanism to dispense print materials directly to an in-situ reservoir of a printing device, a lock feature to engage a fill port during connection of the dispense mechanism to the fill port, and a valve integrated with the dispense mechanism for connecting the dispense mechanism to the fill port of the reservoir and comprising an output opening offset from a center axis of a tip of the dispense mechanism. The valve can open responsive to rotation of the valve opening with respect to the lock feature such that opposite openings align.

Abstract: Examples of a host device that includes an input recess are described. In some examples, the input recess includes a rotating port cover offset from a central axis of the input recess. In some examples, the input recess includes a plurality of contacts disposed on an interfacing surface of the input recess to interface with a print particle replenishment device when the rotating port cover is rotated. In some examples, the plurality of contacts interfaces with a control device to authenticate the print particle replenishment device.

Abstract: In some examples, an apparatus can include a mating interface coupled to a dispense interface to interact with a print particle dispense nozzle, a locking mechanism coupled to the dispense interface to prevent the print particle dispense nozzle from depositing a print particle to the dispense interface, and an authentication mechanism coupled to the locking mechanism to: authenticate the print particle dispense nozzle, and unlock the locking mechanism when the print particle dispense nozzle is authenticated to allow the print particle dispense nozzle to deposit the print particle to the dispense interface.

Abstract: In some examples, an apparatus can include a print substance gauge to indicate a quantity of print particles an imaging device is capable of receiving at a particular time, and an authentication mechanism coupled to a locking mechanism, the authentication mechanism includes instructions to: determine a quantity of print particles within a print particle container, and unlock the locking mechanism when the print substance gauge indicates that the imagining device is capable of receiving the quantity of print particles within the print particle container.

Abstract: Examples of a print particle replenishment device for replenishing a host device are described herein. In some examples, the print particle replenishment device includes an output assembly to output print particles, comprising an interfacing portion. In some examples, the print particle replenishment device includes a plurality of contact pads disposed on an outer portion of the output assembly to rotate with the output assembly when opening a channel of the print particle replenishment device.

Abstract: In some examples, a print material particles dispenser, including: a print material area with an output area that includes an output channel that is positioned away from a central axis of the print material area, and a structure adapted to decrease a volume of the print material area to output print material particles through the output channel of the print material area.

Abstract: In some examples, a print materials container can include a dispense mechanism to dispense print materials directly to an in-situ reservoir of a printing device, a lock feature to engage a fill port during connection of the dispense mechanism to the fill port, and a valve integrated with the dispense mechanism for connecting the dispense mechanism to the fill port of the reservoir and comprising an output opening offset from a center axis of a tip of the dispense mechanism. The valve can open responsive to rotation of the valve opening with respect to the lock feature such that opposite openings align.

Abstract: An audio system and methods for detecting proximity between or engagement between a removable open-ear acoustic module and a host device. Upon detection of proximity or engagement, the audio system may adjust at least one device setting of the devices in the system. In some examples, the devices of the audio system are capable of obtaining specific identifying information about the other devices, and can be configured to adjust the at least one device setting based on device identity. For example, adjusting the device settings can include an adjustment to power state of the open-ear acoustic module, an audio equalization (EQ) setting, a volume setting, a bass level setting, a treble level setting, an Active Noise Reduction (ANR) setting, a user profile setting, selection of an algorithm of a plurality of algorithms related to data collection, a sensor calibration setting, and a user interface control setting.