A composite structure formation method includes the steps of storing a plurality of pre-formed controlled particles in a storage mechanism, supplying the controlled particles from the storage mechanism to an aerosolation mechanism constantly, disaggregating the supplied controlled particles into a plurality of the fine particles in the aerosolation mechanism to form an aerosol in which an entire contents of the controlled particles including the fine particles are dispersed in the gas; and spraying all of the fine particles in the aerosol toward the substrate to form a composite structure of the structure and the substrate. The controlled particles are controlled so that bonding strength between the fine particles includes a mean compressive fracture strength sufficient to substantially avoid disaggregation during the supply step, but which permits the controlled particles to be substantially completely disaggregated in the disaggregation step.

A particulate feeding apparatus for applying particulate, such as super-absorbent materials, to a substrate, such as a fibrous web. A feeder tube for the powder and a rotary gate valve, including one or more holes is provided. This structure may then intermittently feed particulate to an eductor or venturi nozzle. The rotary valve provides an intermittent supply of particulate to a relatively low-pressure zone at the nozzle formed by the venturi action of the passing air stream and the particulate may be distributed precisely where desired. A process for delivering powder to a substrate in precise amounts and distribution patterns is also disclosed.

A powder feeder according to one aspect of the present disclosure is a powder feeding device that feeds powder from a feeder to a nozzle. The powder feeding device includes a cartridge configured to store the powder in an airtight condition, and includes the feeder. The cartridge includes a port from which the powder is stored and withdrawn, and an open/close valve for opening and closing the port. The feeder includes a connection portion to which the cartridge is removably connected, a supply port configured to supply the powder in the cartridge connected to the connection portion into the feeder, and an opening/closing valve for opening and closing the supply port. The feeder is configured to insert the powder supplied from the supply port to the feeder into the nozzle, and the cartridge and the feeder are configured to form an enclosed space between the port and the supply port in response to the cartridge being connected to the connection portion.

An arrangement is disclosed for the preferably automatic coating of objects with a coating material, in particular coating powder. The arrangement includes at least one spray device having a spray nozzle via which the coating material is dispensable in a main spraying direction. An extension is further provided, wherein an end region of the extension facing the spray device is preferably detachably connected to an end region of the spray device associated with the extension opposite from the spray nozzle. The arrangement further includes a preferably horizontally extending guide via which the extension with the spray device connected thereto can be longitudinally moved in the direction of extension of the guide relative to the object to be coated. The main spraying direction of the spray nozzle may be implemented so as to deviate from the direction of extension of the guide by a predefined or definable angle.

Apparatus and methods are provided for the manufacture of filtration articles. The apparatus and methods include a separate first chamber for dispersion of the inorganic particles and a larger second chamber for deposition of the inorganic particles on a single honeycomb body or multiple honeycomb bodies.