PURPOSE: To reduce a transportation space, facilitate fixing of accessory parts, facilitate a fine adjustment of a bending angle of a cartridge guide plate for dividing and forming a cartridge tank storing part.

CONSTITUTION: A bending part near a central portion of a cartridge tank guiding plate 8 is provided with many slits to enable a manual bending of it to be performed and the bending of it near the central portion is carried out later. With such an arrangement, it is possible to transport the plate to an assemblying factory with its state being approximate to its flat state and at the same time a fixing of the accessory parts to the cartridge guiding plate 8 can be carried out in the same plane. As it is fixed to the main body case, the plate is bent manually along the slit 8e to enable a fine adjustment to be carried out.