Abstract: A servo control apparatus which can accurately control the head with a simplified structure has a voltage controlled oscillator which is controlled in accordance with servo information stored in a servo data region of the disk, and a reversible counter which counts an output signal of the voltage controlled oscillator to convert it to a digital signal corresponding to the amount of deviation of the head from a target track. The digital signal is used for position control for accurate positioning of the head.

Abstract: An economical touch system coordinates input apparatus having high mechanical strength is disclosed. The coordinates input apparatus comprises a panel to which a push force is to be applied, a plurality of straining portions where component forces of the push force applied to the panel develop, detectors for detecting the strain developing at the straining portions, respectively, and calculation means for calculating the push point on the panel by means of the outputs of the detectors, wherein the panel is integral with the straining portions.

Abstract: A sheet transportation and separation apparatus separates a sheet, which is moved in close contact with the surface of a member moving in synchronization with the sheet, from the surface of the moving member by deforming the corner of a leading edge of the sheet by a member operated by the edge of the sheet.