초록 ▼

A powder dispenser includes a resilient container for storing a powder and a volume of air therein. The powder has properties which enable a portion of the volume of air to fluidize a portion of the powder when the resilient container is sufficiently deformed. The dispenser has a substantially rigid

A powder dispenser includes a resilient container for storing a powder and a volume of air therein. The powder has properties which enable a portion of the volume of air to fluidize a portion of the powder when the resilient container is sufficiently deformed. The dispenser has a substantially rigid conduit connected to its discharge end. The conduit provides the only fluid communication between the inside of the container and an ambient outside environment. The dispenser also has a resilient flat member connected to the outer end of the conduit. The flat member has a slit that is normally closed such that the container is substantially sealed in a fluid-tight manner until the container is sufficiently deformed to generate a pressure in the volume of air. When a pressure differential exists that is greater than a threshold value, the pressure differential causes the slit to open to discharge a portion of the powder mixed with a portion of the volume of air. The dispenser may also have an apertured member in the conduit that has at least one aperture therethrough having a total cross-sectional area smaller than a cross-sectional area of the conduit. The at least one aperture provides increased air velocity and turbulence to improve mixing of powder and air.

대표청구항 ▼

[ What is claimed is:] [1.] A powder dispenser comprising:a) a resilient container having an inside for storing a powder and a volume of air therein, said resilient container also having a discharge end;b) a substantially rigid conduit connected to said discharge end of said resilient container, sai

[ What is claimed is:] [1.] A powder dispenser comprising:a) a resilient container having an inside for storing a powder and a volume of air therein, said resilient container also having a discharge end;b) a substantially rigid conduit connected to said discharge end of said resilient container, said conduit having an inside end and an outside end, said conduit providing the only fluid communication between said inside of said resilient container and an ambient environment outside said resilient container; andc) a resilient flat member connected to said outside end of said conduit, said resilient flat member having a slit therein, said slit being normally closed such that said resilient container is substantially sealed in a fluid-tight manner until said resilient container is sufficiently deformed to generate a pressure in said volume of air such that a pressure differential exists between said volume of air and said ambient environment and said pressure differential is greater than a threshold value, said pressure differential causing said slit to open.