Abstract: An intermediate belt made of an endless belt is provided by 45 degrees inclined horizontally and looped over two rollers at both its ends, and four photosensitive drums are provided in contact with the top surface of this intermediate belt. A reflection mirror is provided over each photosensitive drum, and a single polygon mirror is provided on almost the same level as these reflection mirrors. The polygon mirror is provided on the side of the reflection mirror of which optical path to the corresponding photosensitive drum is the longest so that the optical path lengths from the polygon mirror to the respective photosensitive drums are equal to each other.

Abstract: An electrostatic imaging device such as copying machine includes a photoreceptor, a corona electrifier for the photoreceptor, a developer and a ventilation system. The ventilation system includes a suction duct having a suction port for absorbing ozone generated by the corona electrifier, an exhaust duct having a pair of air nozzle for blasting air to the developer for prevention of ink leakage, an ozone remover for removing ozone from the air inside the duct to provide clean air to the air nozzle.

Abstract: The present invention provides an enzyme-containing granulated product containing, in a uniformly dispersed state, an enzyme and one or more stabilizers selected from the group consisting of reducing agents and antioxidants. The invention also discloses a method for the production of the granulated product, as well as bleaching agents and detergent compositions containing the granulated product. The granulated product loses only a minimal level of enzyme activity even in the copresence of a bleaching agent, and exhibits excellent solubility. Therefore, bleach compositions and detergent compositions prepared by incorporating the granulated product fully exhibit the enzyme activity and bleaching activity.