Apparatus for the continuous pressure treatment of a web
AssigneeEdward Kusters
InventorValentin Appenzeller
Life of this patent
Estimating the term…
Abstract
Pressure treatment apparatus for continuous web treatment includes a drum and a belt surrounding the drum almost completely with both drum and belt being movable with the web disposed in between. A pair of essentially semi-cylindrical sleeves are disposed about the belt as a supporting surface with a friction-reducing means, such as interconnected rollers, between the sleeves and belt to transfer force. The sleeve ends are spaced apart at two sides to permit passage of the web and belt while at the same time being urged together of both sides to impart a tensile force in the sleeve. This tensile force serves to exert a uniform pressure on the moving web substantially over the entire surface of the drum with the forces contained in a closed system and not loading the drum bearings.
Claims19
An apparatus for the continuous pressure treatment of a web comprising a rotatable drum supported for rotation on an axle, said drum having a surface for engaging the web;
- first and second sleeves in the shape of sections of a cylinder forming a supporting surface about said drum, said sleeves being disposed around said drum surface for substantially more than 180.degree. forming two gaps at the opposed ends of said sleeves;
- first and second movable pressure belts looped about said drum for concurrent movement therewith, each belt being associated with one of said sleeves, said belts entering between the drum and sleeve through one of said gaps and exiting through the other;
- friction-reducing means between said sleeves and said belts;
- means for feeding said web between said drum and one of said belts;
- means for removing said web from between the other of said belts and said drum;
- and
- means interconnecting the ends of said sleeves at both of said gaps to impart a tensile stress in said sleeves with said tensile stress applied equally at both of said gaps.
Dependencies are inferred from the claim text.