Method and apparatus for applying particulate

Details Method and apparatus for applying particulate Method and apparatus for applying particulate

B - Operations, Transporting

05

D

B05D 1/12 (2006.01) A61F 13/15 (2006.01) B05C 5/00 (2006.01)

Patent

CA 2706262

The present disclosure relates to a particulate feeding apparatus for applying particulate, such as super-absorbent materials, to a substrate, such as a fibrous web. The apparatus may include a feeder tube for the powder and a rotary gate valve, including one or more holes, which may then intermittently feed particulate to an eductor or venturi nozzle which is located in an air stream. 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.

La présente invention se rapporte à un appareil d'acheminement de matières particulaires destiné à appliquer des matières particulaires, telles que des matières super-absorbantes, sur un substrat, tel qu'une bande fibreuse. L'appareil peut comprendre un tube de distribution pour la poudre et un robinet-vanne rotatif, comprenant un ou plusieurs trous, qui peuvent ensuite acheminer par intermittence les matières particulaires vers un éjecteur ou une buse venturi qui se trouve dans un courant d'air. La vanne rotative permet un envoi intermittent de matières particulaires vers une zone à pression relativement basse sur la buse formée par l'action venturi du courant d'air qui passe et les matières particulaires peuvent être distribuées de manière précise à l'endroit que l'on souhaite. Un processus de distribution de poudre vers un substrat en quantités et selon des modèles de distribution précis est également décrit.

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