Abstract: Disclosed is a plate type of heating device for melting solid oils comprising a sheathed heater, a plate-like metal covering for enclosing the major part of the sheathed heater in thermal conducting relation with the metal covering, an external cladding body joining with the opposite ends of the sheathed heater, a handle integrally connected to the external cladding body and a connector for connecting the sheathed heater to an electric power source through the external cladding body.

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: A clamshell griddle is designed so that the rising, lowering and rotating motions of the platen and the setting of distance between the griddle and the platen main body can be effected automatically and in one stroke by the operation of a single motor, thereby resulting in simple structure and low price.