In the staple process and folding process after performing switchback transport of a sheet, there is provided a technique which can be made to the improvement of maintenance in the case where a sheet jam occurs in the vicinity of the switchback position. for at least 60 minutes, and a step of crystallization thereafter. The epoxy resin and the aggregate are present in the grout mixture in an epoxy resin:aggregate weight ratio of about 0. Finally, image information is captured at a lower speed than the calculated relative movement speed to execute image measurement. A ferromagnetic data layer is deposited within the annular slot and a junction stack is then provided upon at least a portion of the data layer. In certain embodiments of the present invention, a stylus body is provided with a spring member and stop with openings having different shaped portions so that when the stop is depressed it can free the stylus arm and allow rotation andor translation and, when released, it can lock the stylus arm from rotating andor translating.