Air clamp stabilizer for continuous web materials

Details Air clamp stabilizer for continuous web materials Air clamp stabilizer for continuous web materials

D - Textiles, Paper

21

F

D21F 1/42 (2006.01) B65H 20/14 (2006.01) B65H 23/24 (2006.01) D21F 5/18 (2006.01)

Patent

CA 2464704

A device (10) for non-contact support of a continuous moving web (38) of . material employs an air clamp stabilizer (10) that includes a Coanda slot (18) and a backstep (16) that is located downstream of the direction of the airflow extending from the Coanda slot (18). This configuration permits a Coanda jet to expand and to create an additional suction force. Vortex formation may also occur which further contributes to the strength of the suction force. As the web (38) passes the stabilizer, an area of the web material rides on an air bearing that is maintained above the stabilizer surface (12A,12B,14) and downstream of the backstep (16).

L'invention se rapporte à un dispositif (10) de support sans contact d'une bande (38) à déplacement continu de matériaux. Ce dispositif comprend un stabilisateur (10) à serrage pneumatique qui comporte une fente Coanda (18) et un décrochement (16) situé en aval de la direction du flux d'air qui s'étend depuis la fente Coanda (18). Cette configuration permet à un jet Coanda de se répandre et de créer une force d'aspiration supplémentaire. Une formation de vortex peut également se produire, ce qui renforce la puissance de la force d'aspiration. Alors que la bande (38) traverse le stabilisateur, une zone de la bande de matériaux passe sur un palier à air qui est maintenu au-dessus de la surface du stabilisateur (12A, 12B, 14) et en aval du décrochement (16).

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