Abstract: There is provided a device and a method adapted to confirm whether data is completely erased when erasing data in a magnetic recording medium. A recorded data eraser for erasing data recorded in a magnetic recording medium by means of a magnetic field includes an input voltage monitor for monitoring an input voltage of electricity supplied to an excitation controlling part for exciting a coil, a charging voltage monitor for monitoring a charging voltage of a capacitor, and an operation checking part having a warning means for warning an anomaly based on the outputs from the two monitors.

Abstract: A wrapping device for manually operating to package products, particularly of cubic or cuboidal shape, includes a table, an upper side folder, a first heater, second heaters, first adjusters, second adjusters, and side interfolders. A wrapper such as a film is extended on the table and a product is placed on a recess of the table. Then, the film is folded toward the top face of the product, to which the folder is moved to fuse it by the first heater. Then, the first adjusters and the second adjusters are moved, and the table is moved downward to interfold, and fuse the film by the second heaters.

Abstract: A device for wrapping an object of substantially cuboid shape with predetermined width, length and thickness having top and bottom faces opposed in a thickness direction, front and rear end faces opposed in a longitudinal direction, and right and left side faces opposed in a width direction, in a wrapping material fusible by heating. The device has a mounting table, a movable folder, and a front face heater to heat the wrapping material to a fusing temperature. The mounting table has a front bottom step. The movable folder has a front top step movable toward the mounting table. The front top step is adapted to face the front bottom step in the thickness direction when the movable folder is moved to the mounting table. The front face heater is movable between the front bottom step and the front top step to fuse the wrapping material of the front end face.

Abstract: A drive transmission system for a working vehicle for transmitting power of an engine to running devices through a main clutch, a main change speed device and an auxiliary change speed device is disclosed. The main change speed device includes a first group of hydraulic clutches and a group of control valves for operating these clutches. The auxiliary change speed device includes a second group of hydraulic clutches and control valves for operating these clutches. Pressure oil is supplied to selected clutches of the first and second groups of hydraulic clutches to obtain the desired speed.