초록 ▼

A press belt arrangement in which none of the compressive forces on the central drum are transmitted to the supporting frame. It provides a method in which a greater compressive force in relationship to belt tension is applied to the drum. The invention makes it possible to construct the central dru

A press belt arrangement in which none of the compressive forces on the central drum are transmitted to the supporting frame. It provides a method in which a greater compressive force in relationship to belt tension is applied to the drum. The invention makes it possible to construct the central drum so that large quantities of heat can be fluxed through it for purposes of achieving the fast drying rates long sought in the industry.

대표청구항 ▼

A drum and belt-type press for compressing a moving web or mat which comprises: (a) a supporting frame for a drum, belt tensioning rolls, and belt tensioning means; (b) a pair of spaced apart first and second cylindrical belt tensioning rolls having essentially parallel axes of rotation; (c) a centr

A drum and belt-type press for compressing a moving web or mat which comprises: (a) a supporting frame for a drum, belt tensioning rolls, and belt tensioning means; (b) a pair of spaced apart first and second cylindrical belt tensioning rolls having essentially parallel axes of rotation; (c) a central drum adjacent said tensioning rolls, said drum having an axis of rotation essentially parallel to the axis of rotation of the rolls; (d) an endless flexible belt having an inner generally U-shaped course and an outer generally U-shaped course, the inner and outer courses meeting in loops which wrap around the tensioning rolls, the tensioning rolls each being contained within the body of the belt and the drum being outside the body of the belt, the inner course of the belt being wrapped around more than half the circumference of the central drum, the tensioning rolls and drum being sized so that the inner and outer courses of the belt are spaced apart, each tensioning roll and any other rolls within the belt making nip contact with the drum through the interposed belt so that the total compressive forces of the belt and nips on the central drum are balanced and the summation of forces about the drum axis is essentially zero; (e) drive means for moving the belt through its endless path, so that a web or mat may be compressed by interposing it between the moving belt and drum, (f) tensioning means acting on the tensioning rolls to translate them relatively toward or away from each other to control belt tension while maintaining nip contact, and (g) the tensioning rolls being mounted on the supporting frame the drum being free floating with respect to the tensioning rolls for relative radial movement in response to tensioning adjustments, and the press is structured to maintain nip contacts without transmitting significant belt tensioning forces to the supporting frame or significant axial bending forces to the drum.