Patent ID: 8672588

Claim:
A high pressure transfer device comprising adapted for feeding cellulosic fibrous material: a pocketed rotor containing a plurality of through flow pockets, said rotor rotatable about an axis of rotation and said pockets having opposite end openings which function as both inlets and outlets depending upon an angular position of the rotor within the device, and said pockets are provided in at least first and second sets, wherein the second set of pockets is orthogonal to the first set; a housing enclosing said rotor, said housing having a low pressure inlet port configured to receive the cellulosic material and the low pressure inlet port is aligned with a low pressure outlet port including an opening, and a high pressure inlet port aligned with a high pressure outlet port wherein the high pressure outlet port is configured to discharge the cellulosic material from the housing, wherein said ports are arranged for registry with the inlets to and outlets from said through going pockets and said rotor being mounted in said housing for rotation with respect to said ports about said given axis of rotation; a screen grid seated in or adjacent to the low pressure outlet port wherein the screen grid has an array of screen slots and bars wherein a regular pattern of the slots and bars covers entirely the opening in the low pressure outlet port, and a divider wall traverses the low pressure outlet port, wherein the divider wall is separated from the screen grid by a gap.