A liquid discharge head for controlling discharging of liquid, the liquid discharge head including a valve body configured to be movable, and to be pressed towards a discharge port from which the liquid is discharged; and a recessed portion provided in the valve body at a position facing the discharge port.

A quantitative essential oil dripping device which includes: N sealed essential oil containers for containing essential oil, wherein N is a positive integer greater than or equal to 1; N gas inlet tubes and N oil outlet tubes, which are all inserted into the N essential oil containers respectively, wherein in each of the essential oil containers, a gas outlet of the gas inlet tube is located above an inlet of the oil outlet tube; a gas pump arranged at gas inlets of the N gas inlet tubes; a throttle valve communicating the gas pump with the essential oil container; and a drip number detection module configured to detect the drip number of the essential oil dripped from an oil outlet of the oil outlet tube. During use, the gas pump is started, pressure is applied to the essential oil container through the gas pump, and the essential oil is driven to be dripped from the oil outlet tube under the combined action of the gas pump and the throttle valve, thereby achieving the dripping of the essential oil. The drip number of the essential oil dripped from the oil outlet of the oil outlet tube is detected through the drip number detection module, and the amount of the dripped essential oil is measured by recording the drip number, thereby accurately controlling the dripping of the essential oil. After the dripping of the essential oil is completed, the gas pump is stopped.

A system for dispensing chemical deterrents is used to disperse atomized liquid chemicals into an area in order to deter trespassers. The system is configured to respond to existing security systems. The system includes a plurality of dispensing units, a controller, and a wireless communication device. The plurality of dispensing units is a set of components that provide the storage and dispersal means for contained chemicals and deterrents. The controller is a unit which accepts electrical inputs and outputs appropriate electrical outputs throughout the plurality of dispensing units. The wireless communication device is a remote transceiver capable of receiving signals from security systems or mobile devices, such as personal computing (PC) devices, smartphones, laptops, and more. Further, the wireless communication device may also be capable of collecting and subsequently relaying data to appropriate devices. Together, these components allow the system to activate in response to an emergency.

A liquid droplet ejection device includes at least one first liquid droplet ejection unit including a first liquid holding unit and a first tip, the first tip to eject the first liquid in the first liquid holding unit as a first liquid droplet onto an object; at least one second liquid droplet ejection unit including a second liquid holding unit and a second tip, the second tip to eject the second liquid in the second liquid holding unit as a second liquid droplet onto the object; an object holding unit to hold the object; and a driving unit to move the first tip and the second tip in a first direction. An inner diameter of the second tip is larger than an inner diameter of the first tip. The first tip and the second tip are arranged along the first direction. The second tip is arranged behind the first tip.

A system for applying a first, a second, and a third coating composition. The system includes a first high transfer efficiency applicator defining a first nozzle orifice. The system further includes a second high transfer efficiency applicator defining a second nozzle orifice. The system further includes a third high transfer efficiency applicator defining a third nozzle orifice. The system further includes a substrate defining a target area. The first, the second, and the third high transfer efficiency applicators are configured to expel the first coating composition through the first nozzle orifice to the target area of the substrate, through the second nozzle orifice to the target area of the substrate, and through the third nozzle orifice to the target area of the substrate.

An electrostatic sprayer system for dispensing and dispersing a liquid containing a spray compound includes a spray cloud dispersal feature that reduces the time that a residual spray cloud containing droplets including the spray compound remains suspended after spraying. A method of dispersing the residual spray cloud is implemented by a control system that causes a flow control system to deliver a non-active gas or liquid in conjunction with stopping delivery of the liquid containing the spray agent and charged with the same polarity, so that a charged cloud of the non-active gas or liquid, which may be air, displaces the suspended active fluid particles. The non-active gas or liquid may be dispensed for a predetermined time interval as determined by the control system, or the operator may control the time interval during which that the non-active fluid is dispensed.

An agricultural vehicle includes a frame, a first reservoir coupled to the frame with the first reservoir configured to hold a solvent, a second reservoir coupled to the frame with the second reservoir configured to hold a first solute, and a third reservoir coupled to the frame with the third reservoir configured to hold a second solute different than the first solute. The agricultural vehicle also includes a spray boom coupled to the frame. The spray boom includes a first spray nozzle and a second spray nozzle. The first spray nozzle is independently operable relative to the second spray nozzle such that the first spray nozzle is configured to dispense a first solution comprising the solvent and the first solute onto an agricultural surface and the second spray nozzle is configured to dispense a second solution comprising the solvent and the second solute onto the agricultural surface.

The present invention relates to a method for coating, optionally with specific colouring, an exposed surface of a body with simultaneous formation of a structured surface, including projecting formations, via a device for depositing one or more liquid substances in droplets, in particular by a jet, said method consisting, for each affected site (1) of the surface to be printed (1), of consecutively depositing at least two vertically adjacent layers (6, 6) of a first substance selected from the group made up of a size, a varnish, an adhesion or attachment agent and a coating agent, preferably white or transparent and at least one second substance such as a colouring substance or a mixture of colouring substances, each of the consecutive layers (6, 6) being formed by depositing droplets (4, 4; 5). The method is characterised in that it consists of consecutively depositing at least three vertically adjacent layers (6, 6) which are made up, alternatively, of a first substance and a second substance, each layer (6, 6) being made up of separate individual droplets (4, 4; 5), arranged in each layer according to a predetermined pattern.

A method of forming a coating composition for application to a substrate utilizing a high efficiency transfer applicator. The method includes identifying at least one of an Ohnesorge number (Oh) for the coating composition, a Reynolds number (Re) for the coating composition, or a Deborah number (De) for the coating composition. The method includes obtaining at least one of a viscosity () of the coating composition, a surface tension () of the coating composition, a density () of the coating composition, a relaxation time () of the coating composition, a nozzle diameter (D) of the high efficiency transfer applicator, or an impact velocity (v) of the high efficiency transfer applicator. The method includes forming the coating composition having at least one of the viscosity (), the surface tension (), or the density (). The coating composition is configured to be applied to the substrate utilizing the high efficiency transfer applicator having at least one of the nozzle diameter (D) or the impact velocity (v).

Systems apply a material (e.g., adhesive) to an article (e.g., a component in an article of footwear) with a multiple-nozzle tool. A first nozzle of the multiple-nozzle tool is effective to provide an edge application of the material that is consistent in application of the material. A second nozzle of the multiple-nozzle tool is effective to provide a greater material coverage application than the first nozzle. The second nozzle may be implemented to apply the material at an interior area from the edge at which the first nozzle applies the material, in an exemplary aspect.