D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
D21F 1/50 (2006.01) D21F 1/52 (2006.01) D21F 2/00 (2006.01) D21F 5/14 (2006.01) D21F 11/00 (2006.01)
Patent
CA 2214253
A papermaking vacuum apparatus having a web-facing surface adapted to support a papermaking belt and comprising a head, a body and at least one vacuumslot disposed in the head and defining an aperture on the web-facing surface. The vacuum slot is in fluid communication with the web-facing surface and extends from the web-facing surface to the body which is in further fluid communication with a vacuum source. The web-facing surface has a textured clothing interposed betweenthe web-facing surface of the vacuum apparatus and a backside of the papermakingbelt. The textured clothing creates leakage between the backside of the papermaking belt and the web-facing surface of the vacuum apparatus and effectively eliminates the vacuum seal between these two surfaces. In one preferred embodiment, the textured clothing comprises an endless belt adapted to travel around the vacuum apparatus.
Appareil de mise sous vide, présentant une surface contre-bande, pour la fabrication du papier. Cette surface est adaptée pour supporter une courroie de fabrication du papier et comprend une tête, un corps et au moins une fente de mise sous vide disposée dans la tête et formant une ouverture sur la surface contre-bande. La fente est en contact fluide avec la surface contre-bande, et se prolonge de cette surface au corps, également en contact fluide avec une source de mise sous vide. La surface contre-bande présente un habillage texturé interposé entre la surface contre-bande de l'appareil de mise sous vide et l'envers de la courroie de fabrication du papier. L'habillage texturé crée une fuite entre l'envers de la courroie et la surface contre-bande de l'appareil de mise sous vide, et élimine efficacement le vide entre ces deux surfaces. Selon un modèle préféré de cette invention, l'habillage texturé comprend une courroie sans fin adaptée pour avancer autour de l'appareil de mise sous vide.
Ayers Peter Graves
Buenger Daniel Edward
Ensign Donald Eugene
Trokhan Paul Dennis
Sim & Mcburney
The Procter & Gamble Company
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