Copying machine

摘要

A xerographic copier made up of a machine frame having a suspension mechanism supported in a cabinet so that the frame can be pulled out of the front of the cabinet for servicing. The machine has a drum covered with a removable photo-sensitive sheet of material held in place by double sided adhesive tape and a lens system made up of two lenses. The lenses are swung about an axis passing through the periphery of the drum, and the lenses are maintained at a fixed distance from the document support throughout their movement. A toner dispenser made up of magnetic rubber disposed in the form of a hollow cylinder which moves past a permanent magnet held in fixed position relative to the inner periphery of the cylinder is provided. The magnetic particles in the magnetic rubber are so magnetized that they provide a plurality of spaced magnetic poles, and the permanent magnet cooperates with these poles, causing the particles on the outer side of the hollow cylinder to erect in the form of brush bristles. The permanent magnet can be adjusted so that the brush bristles are formed at the point where the magnetic rubber passes the photoconductor surface. A scanning mechanism is provided for moving the lens frame relative to the document support in synchronism with movement of the photo conductor with the lens frame. This scanning mechanism is made up of a belt running on a pulley the same diameter as the drum, which is synchronized with the drum. A clutch mechanism connects the lens frame to the pulley to move it forward, and a spring is used to move the lens frame backward relative to the document support.