Method and device for application of fibres on a surface

Details Method and device for application of fibres on a surface Method and device for application of fibres on a surface

B - Operations, Transporting

05

D

B05D 1/06 (2006.01) B05B 5/047 (2006.01) B05C 19/00 (2006.01)

Patent

CA 2184911

The invention refers to a method and a device for application of fibres on a base. The probelm that is solved by the present invention is to charge and convey fibres to a surface, on which the fibre is going to be applied, without need of using electrically powered units to generate a high voltage. This is carried out by friction charging of the fibre. This is achieved by using differences in electro-negativity between two materials. The application equipment includes a charging tube (8), through which the fibre is driven. The inside of the charging tube (8) consists of a dielectric material (9), for instance PTFE. This material is strongly electro-negative and therefore tears electrons from materials that have less electro-negativity.

Procédé et dispositif d'application de fibres sur une base. La solution proposée par cette invention consiste à charger et transférer des fibres sur une surface sur laquelle ces fibres doivent être appliquées, sans qu'il soit nécessaire de recourir à des appareils électriques pour générer une tension élevée. Le résultat est obtenu en chargeant les fibres par friction. On exploite pour cela les différences d'électro-négativité entre les deux matériaux. L'appareil d'application comporte un tube de charge (8) dans lequel les fibres sont entraînées. L'intérieur du tube de charge (8) est constitué par un matériau diélectrique (9), par exemple du PTFE. Ce matériau est fortement électro-négatif et arrache donc les électrons des matériaux présentant une électro-négativité plus faible.

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