Abstract: A fluid ejection and circulation apparatus may include a fluid ejection die, the pressure regulator, a first standpipe, a second standpipe and a crossflow passage. The pressure regulator has a fluid chamber. The first standpipe is between the fluid chamber and the fluid ejection die. The first standpipe has a first port above the fluid ejection die. The second standpipe extends alongside the first standpipe. The second standpipe has a second port above the fluid ejection die. The crossflow passage connects the first standpipe and the second standpipe.

Abstract: A print liquid supply apparatus or interface structure to be connected to a print system comprises a liquid channel, liquid interface and integrated circuit contact pads.

Abstract: A rocker valve includes a number of rails to transitionally connect an arm of a spring to the rocker valve such that the arm of the spring transitions across the rocker valve to actuate the rocker valve, a first side of the rocker valve to selectively engage with a valve seat based on a position of the arm of the spring relative to the first side of the rocker valve, and a number of pivot arms to pivot the rocker valve between a closed position and an open position such that the first side of the rocker valve selectively engages with the valve seat to regulate pressure inside a print head assembly.

Abstract: The subject matter discloses a fluid cartridge comprising a container to hold a predetermined volume of fluid, and a lid for closing the container. The lid comprises a valve-recess and an inlet valve in the valve-recess to transfer a volume of a replacement fluid in the container for replacing depleted volume of fluid in the container. A rocker valve is pivoted in the valve-recess to cover the inlet valve during a regulation phase. The rocker valve is to open the inlet valve during an actuation phase to allow the replacement fluid to enter the container. A spring element is movably disposed on the rocker valve to control actuation of the rocker valve for opening and closing the inlet valve. The spring element slides across the rocker valve, from a regulation zone of the rocker valve to an actuation zone of the rocker valve, to open the inlet valve.

Abstract: A surface acoustic wave sensor system for determining environmental conditions on a substrate. The system comprises an interrogator for producing an RF interrogating signal transmitted by an antenna to an interdigital transducer mounted on the substrate for producing an incident surface acoustic wave responsive to the interrogating signal. A plurality of reflector arrays mounted on the substrate produce a like plurality of reflected surface acoustic waves; a spacing between adjacent ones of the plurality of reflector arrays comprising a non-uniform distance. The plurality of reflected surface acoustic waves are responsive to the environmental condition and exhibit a characteristic from which the environmental condition can be determined by a processing component.

Abstract: A rocker valve includes a number of rails to transitionally connect an arm of a spring to the rocker valve such that the arm of the spring transitions across the rocker valve to actuate the rocker valve, a first side of the rocker valve to selectively engage with a valve seat based on a position of the arm of the spring relative to the first side of the rocker valve, and a number of pivot arms to pivot the rocker valve between a closed position and an open position such that the first side of the rocker valve selectively engages with the valve seat to regulate pressure inside a print head assembly.

Abstract: A sensor system for determining deformation of an object subject to forces. The sensor system comprises an object upon which forces are exerted and a cavity within the object, a first substrate for supporting surface acoustic waves in an upper surface of the first substrate, the first substrate disposed in the cavity, a first surface acoustic wave transducer disposed on the upper surface and responsive to an interrogation signal for generating an incident surface acoustic wave in the upper surface, a first reflector array responsive to the incident surface acoustic wave for creating reflected surface acoustic waves on the upper surface, the reflected surface acoustic waves received by the transducer and having characteristics indicative of strain deformation of the object due to a force exerted on the object.

Abstract: A surface acoustic wave sensor system for determining environmental conditions on a substrate. The system comprises an interrogator for producing an RF interrogating signal transmitted by an antenna to an interdigital transducer mounted on the substrate for producing an incident surface acoustic wave responsive to the interrogating signal. A plurality of reflector arrays mounted on the substrate produce a like plurality of reflected surface acoustic waves; a spacing between adjacent ones of the plurality of reflector arrays comprising a non-uniform distance. The plurality of reflected surface acoustic waves are responsive to the environmental condition and exhibit a characteristic from which the environmental condition can be determined by a processing component.

Abstract: A sensor system for determining deformation of an object subject to forces. The sensor system comprises an object upon which forces are exerted and a cavity within the object, a first substrate for supporting surface acoustic waves in an upper surface of the first substrate, the first substrate disposed in the cavity, a first surface acoustic wave transducer disposed on the upper surface and responsive to an interrogation signal for generating an incident surface acoustic wave in the upper surface, a first reflector array responsive to the incident surface acoustic wave for creating reflected surface acoustic waves on the upper surface, the reflected surface acoustic waves received by the transducer and having characteristics indicative of strain deformation of the object due to a force exerted on the object.

Abstract: In one example, an ink supply assembly that may be installed into a printer as a single unit while holding ink includes a first sub-assembly having a primary container to hold ink and a secondary container enclosing the primary container and configured to fit inside the printer. The assembly also includes a a second sub-assembly having an ink supply to receive ink from the primary container through a conduit and to deliver ink to a printhead.

Abstract: In one example, an ink storage unit for an inkjet printer includes multiple bags to hold ink, a single housing enclosing the bags and configured to fit inside the printer, and an outlet from each bag to connect to an ink flow path external to the housing. In another example, a liquid supply unit includes multiple primary containers each holding liquid, a single secondary container enclosing the primary containers, and an outlet from each primary container. In this example, each outlet is positioned at the middle of a vertical column of liquid in the corresponding primary container.

Abstract: A SAW sensor disposed in on a material. The sensor comprises an antenna having a sacrificial link in at least one antenna element, wherein the sacrificial link is exposed to degrading elements within or on a surface of the material, a SAW transducer responsive to an interrogation signal for generating an incident acoustic wave, a reflector responsive to the incident SAW for creating a reflected SAW, the reflected SAW received by the transducer, the transducer for creating a response signal responsive to the reflected SAW, and the response signal transmitted from the antenna, characteristics of the response signal dependent on a condition of the sacrificial link.

Abstract: In one example, an ink storage unit for an inkjet printer includes multiple bags to hold ink, a single housing enclosing the bags and configured to fit inside the printer, and an outlet from each bag to connect to an ink flow path external to the housing. In another example, a liquid supply unit includes multiple primary containers each holding liquid, a single secondary container enclosing the primary containers, and an outlet from each primary container. In this example, each outlet is positioned at the middle of a vertical column of liquid in the corresponding primary container.

Abstract: A pressure regulator apparatus usable with an aerosol supply device containing a fluid includes an inflatable diaphragm unit including an upper surface member, a lower surface member, and a diaphragm chamber formed between the upper surface member and the lower surface member, an output port member having an output cavity and an output port, at least a portion of the output port member is disposed within and in fluid communication with the diaphragm chamber, a valve actuator including an actuator cavity and one or more actuator openings in fluid communication with the output port, at least a portion of the valve actuator is moveably disposed within the output cavity, an input port member having an input port configured to allow the fluid to enter the actuator cavity, at least a portion of the input port member is disposed proximate to the actuator cavity, and an axial flow path extending between the input port and the output port, and configured to allow the fluid to selectively pass in a substantially axial

Abstract: Embodiments are directed towards providing a user of a remote device access to the capabilities of an imaging device by employing preview images. An image of a document may be generated at the imaging device, wherein the imaging device is enabled to print, fax, project, display, or otherwise present a representation of the image. A preview image of the image may be generated at the imaging device. The preview image may be provided to the remote control device. The preview image may be displayed at the remote device. Available imaging device commands, based on an attribute of the document may be provided to and displayed at the remote device. A user of the remote device may be enabled to selectively activate an available imaging device command. An imaging device command activated at the remote device may be provided to the imaging device. The imaging device may perform the provided imaging device command. The image may be updated.

Abstract: In one example, an ink supply assembly that may be installed into a printer as a single unit while holding ink includes A first sub-assembly having a primary container to hold ink and a secondary container enclosing the primary container and configured to fit inside the printer. The assembly also includes a a second sub-assembly having an ink supply to receive ink from the primary container through a conduit and to deliver ink to a printhead.

Abstract: A surface acoustic wave device responsive to an interrogation signal for producing a return signal. The surface acoustic wave device comprises an antenna for receiving the interrogation signal, a piezoelectric substrate, one or more frequency-selective reflective arrays disposed on the piezoelectric substrate, an interdigital transducer for launching an incident surface acoustic wave on the substrate in response to the interrogation signal, the incident surface acoustic wave propagating to the one or more frequency-selective reflective arrays, a reflected surface acoustic wave reflected from each one of the reflective arrays, the interdigital transducer receiving the reflected surface acoustic waves, and the return signal, responsive to each reflected surface acoustic waves.

Abstract: A removable ink supply comprises an ink container including a coupler configured to removably engage a receiver of an ink supply station of an image forming apparatus. The coupler includes an end portion including an array of key holes with each key hole configured to removably receive a respective one key of an array of at least partially conductive keys of the receiver of the ink supply station. A conductive component of the coupler is positioned within the coupler and spaced apart from the end portion. The conductive component is in axial alignment with at least some of the respective key holes to be positioned for selective, removable contact with at least some of the respective keys of the receiver. An absence or a presence of removable contact between the conductive component and the key indicates an out-of-ink status of the image forming apparatus.

Abstract: An ink container for an inkjet print head includes a substantially rigid body of polymer material, the body including a base and a side wall integrally formed with the base at a perimeter of the base, the body containing ink in a low pressure chamber, and the polymer material having moderate to high air permeability. A flexible film is sealed over the low pressure chamber, inwardly flexible in response to a decrease in pressure and ink volume in the low pressure chamber, and outwardly flexible in response to an increase in pressure and ink volume in the low pressure chamber. A metal is coated on a perimeter of the polymer body and on an outer exposed surface of the flexible film, the metal to form a metal coating configured to decrease the air permeability of the polymer body, the metal coating being formed from at least copper.

Abstract: A surface acoustic wave device responsive to an interrogation signal for producing a return signal. The surface acoustic wave device comprises an antenna for receiving the interrogation signal, a piezoelectric substrate, one or more frequency-selective reflective arrays disposed on the piezoelectric substrate, an interdigital transducer for launching an incident surface acoustic wave on the substrate in response to the interrogation signal, the incident surface acoustic wave propagating to the one or more frequency-selective reflective arrays, a reflected surface acoustic wave reflected from each one of the reflective arrays, the interdigital transducer receiving the reflected surface acoustic waves, and the return signal, responsive to each reflected surface acoustic waves.