Abstract: A sieving device having a mesh screen detachable from a frame body is capable of easily removing particulate material remained on the mesh screen and cleaning of the mesh screen and being installed even in a confined space requiring a sanitary condition. The particulate material sieved through the mesh screen is prevented from getting out of a collecting container or scattering around. With a vibration generating means in the sieving device, sieving vibration can be efficiently produced with a relatively small power with preventing coagulation and agglomeration of the particulate material. By corrugating the bottom of the mesh screen, the efficiency of sieving the particulate material be increased remarkably.

Abstract: The invention is directed to a marine vessel and method of construction, wherein the vessel hull is formed to have a bottom and side portions, and includes a frame comprising a plurality of at least frame and/or stringer members extending crosswise or lengthwise and selectively fixed to the bottom or side portions of the hull. The frame and/or rib members are fixed to the hull to provide structural integrity. The frame and/or rib members are fixed into engagement by an adhesive bond; wherein the adhesive bond provides an amount of resiliency to dampen vibrations and other forces at the location of engagement. The invention is also directed to a method of forming the hull using a plurality of sheet members, each of which is formed with a plurality of complex or differential bends. The sheets are formed by imparting consecutive and sequential bends in the various sheets to form at least a part of the side and bottom portions of the hull, while concomitantly imparting a desired curvature from fore to aft.