Process and apparatus for high-speed filling of composite...

A - Human Necessities – 24 – D

Patent

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A24D 3/02 (2006.01)

Patent

CA 2510186

A process of manufacturing composite filter stock (14)rovided that includes several steps. In a first step, a paper carrier strip (50) feeds along a conveyor (30). Along one edge of the carrier strip, the paper is folded back against itself. Fibrous filter segments (22) are then deposited on the carrying strip in spaced apart intervals. The spacing defines cavities (16) between adjacent filter segments. The carrier strip with the deposited filter segments is fed along a path (110) of travel into an elongated guide (26) or support chamber that substantially surrounds the circumference of the paper- enveloped segments (22) and which leaves a narrow fill opening (62)opposite an elongated particulate filling opening (112) that is elongated in the direction of motion of the carrying strip. Suction or a vacuum is concurrently applied adjacent the narrow opening (62), the suction increasing a downward momentum of a gravity feed stream of particulate matter (20) and concurrently vacuums away loose particulate matter. The cavities are concurrently filled with the particulate matter over a length (L) corresponding to a predetermined path of travel of the carrying strip. The folded over edge (104) is then unfolded and adhered to seal the fill opening. The filter stock is then cut to length, the cutting being registered to create discrete composite filter segments.

L'invention concerne un procédé de fabrication de filtre composite (14) comprenant plusieurs étapes. Dans une première étape, une bande de support papier (50) est alimentée le long d'un convoyeur (30). Le long d'un bord de la bande support, le papier est plié en arrière contre lui-même. Des segments fibreux de filtre (22) sont alors déposés sur la bande porteuse selon des intervalles distants. L'espacement définit des cavités (16) entre les segments adjacents de filtre. La bande support avec les segments déposés de filtre suit un trajet (110) dans un guide oblong (26), ou bien une chambre support, qui entoure sensiblement la circonférence des segments enveloppés de papier (22) et qui part d'une ouverture étroite de remplissage (62), opposée à une ouverture de remplissage de particules oblongues (112), prolongée dans la direction du mouvement de la bande porteuse. Une aspiration, ou un vide, est concurremment appliqué à l'ouverture étroite (62), l'aspiration augmentant un flux d'alimentation par gravité de la matière particulaire (20) et nettoyant aussi par le vide des débris particulaires. Les cavités sont concurremment remplies de matière particulaire sur une longueur (L) correspondant à une distance déterminée de déplacement de la bande porteuse. Le bord replié (104) est alors déplié et collé pour sceller l'ouverture de remplissage. Le filtre est alors coupé à la longueur, le découpage étant fixé pour créer des segments discrets de filtre composite.

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