A check valve system includes a housing, a blocking element, and a biasing member. The housing has a passageway therethrough, the passageway including a first portion and a second portion, the first portion having a diameter that is less than a diameter of the second portion so as to form a stepped portion. The blocking element is disposed within the second portion of the passageway. The biasing member is disposed within the second portion of the passageway and configured to maintain the blocking element in contact with the stepped portion when under compression. The housing, the blocking element and the biasing member being obtainable by substantially simultaneously 3D printing, so as to be formed from one or more 3D printable materials.

A cosmetic portioning machine is provided having a mixing chamber, with a plurality of radially-disposed inlets, each of which provides an ingredient. A piston disposed in the mixing chamber defines a mixing volume. A dasher may be disposed in the mixing chamber to mix the ingredients together in the mixing volume so as to form a cosmetic. When the cosmetic product is thoroughly mixed, the piston urges the product out of the mixing chamber and through an outlet. A moveable sealing member is configured to pass through the outlet so as to seal off fluid communication between the mixing chamber and the outlet and to urge any remaining cosmetic product through the outlet.

Methods, apparatus, devices and systems for mixing and dispensing multi-component materials. The mixing and dispensing may be performed using a mobile, enclosed dispenser that can be used to supply a mixed multi-component material at the point of use. In some embodiments, the components to be mixed into the multi-component material may be supplied in cartridges.

The disclosure relates to an application device for multi-component substances, in particular multi-component adhesives or multi-component sealants, including: at least two cartridge receiving devices for receiving replaceable cartridges with substance components that are to be mixed; a discharging device for discharging the substance components from the cartridges; a mixing device for mixing the substance components, wherein the mixing device includes a rotary mixer which is driven via a drive shaft, the drive shaft having at least one flexible portion with a first end and a second end.

The mixing device of cell printing composition according to the present disclosure comprises a first syringe comprising a first container for containing first liquid, a first moving element discharging the first liquid contained in the first container; a second syringe comprising a second container for containing second liquid, a second moving element discharging the second liquid contained in the second container; a mixing container which comprises a rotating mixing unit and receives the discharged first liquid and the discharged second liquids; a power transmission unit for driving the first moving element, the second moving element and the mixing unit; a first threaded guide where the first moving element is movably connected; a second threaded guide where the second moving element is movably connected; and a rod for rotating the mixing unit.

A dispenser assembly includes a rod, a plunger and a stopper. The rod has a plunger receiving end with a clip receiving recess. The plunger has a rod receiving structure with a rod engaging clip biased to fit to the clip receiving recess of the rod for movement therewith. The stopper has a plunger receiving space that defines an aperture extending through the plunger receiving space with the rod extending through the aperture. The plunger receiving space is dimensioned such that with the rod receiving structure of the plunger located within the plunger receiving space, movement of the rod engaging clip is restricted by contact with surfaces of the plunger receiving space preventing release of the rod from the plunger.

Self-venting nozzles and nozzle attachments adapted to vent a gas entrained in a fluid to an atmosphere are described. The nozzles or attachments comprise a nozzle inlet end, a nozzle outlet end, a nozzle wall extending between the nozzle inlet end and nozzle outlet end and having an interior surface defining a fluid channel surrounding a nozzle flow axis, and one or more vent passageways providing fluid communication between the fluid channel and the atmosphere. Nozzle systems comprising the self-venting nozzle and a dispenser, as well as methods of dispensing a fluid having a gas entrained therein are also described.

A dispenser for mixing and dispensing a multi-component adhesive or sealant includes a first motor operably coupled to two or more plungers, each plunger being slidably disposed in a respective one of two or more barrels and configured to apply a dispensing pressure to respective materials to be dispensed, a second motor operably coupled to an output drive shaft having a mating end, and a coupling plate removably attached to a front end of the dispenser, the coupling plate configured to attach to a disposable mixer attachment configured to mix and dispense the multi-component adhesive or sealant, the disposable mixer attachment having a drive shaft driving a mixing component and configured to selectively couple with the mating end of the output drive shaft of the second motor, thereby enabling dynamic mixing of the respective materials to be dispensed.

A cosmetic portioning machine is provided having a mixing chamber, with a plurality of inlets each of which provides an ingredient. A piston disposed in the mixing chamber to define a mixing volume. A dasher is disposed in the mixing chamber and mixes the ingredients together in the mixing volume so as to form a cosmetic. When the cosmetic product is thoroughly mixed, the piston urges the product out of the mixing chamber and through an outlet. A moveable sealing member is configured to pass through the outlet so as to seal off fluid communication between the mixing chamber and the outlet and to urge any remaining cosmetic product through the outlet.

An application system is disclosed for two-component materials, and can include a moisture-reactive composition accommodated in a first packaging unit, a hardener component accommodated in a second packaging unit and a dynamic mixer configured for insertion into an applicator and to be driven by the applicator.