초록 ▼

An ion printing head is provided with a pin array coronde as an ion generation device, a corona controlling electrode and an array of modulation electrodes controlling the flow of ions to an imaging member in imagewise configuration. The pin array coronode provides an efficient and highly directable

An ion printing head is provided with a pin array coronde as an ion generation device, a corona controlling electrode and an array of modulation electrodes controlling the flow of ions to an imaging member in imagewise configuration. The pin array coronode provides an efficient and highly directable source of ions. At least part of the directability of the ions appears to be a result of the highly directionalized ion or corona wind, that tends to flow in a direction defined by the plane of the coronode. The corona wind also serves the purpose of removing corona effluents from the area adjacent the coronode that eventually cause deterioration of the head parts.

대표청구항 ▼

An ionographic imaging device, for depositing charge in imagewise configuration of an imaging surface moving in a process direction, comprising: a support member; a pin array coronode supported on the support member and positioned transverse to the process direction, having an array of projections d

An ionographic imaging device, for depositing charge in imagewise configuration of an imaging surface moving in a process direction, comprising: a support member; a pin array coronode supported on the support member and positioned transverse to the process direction, having an array of projections directed towards the imaging surface, and coupled to a coronode power supply suitable to drive the coronode to a corona producing condition to produce a supply of ions directed toward the imaging surface; a corona controlling grid member, supported on the support member, and arranged between the pin array coronode and the imaging surface, and biased to a selected grid voltage level, the grid member formed to provide an opening therethrough, through which ions generated at the pin array coronode pass; an array of control electrodes supported on an array substrate and positioned transverse to the process direction, in generally parallel opposition to a conductive member, the substrate and the conductive member supported on the support member with respect to each other to form an ion modulation path therebetween, through which ions generated at the pin array coronode pass, each control electrode of the array connected to an imaging control power supply and individually biasable to a selected electrode voltage level with respect to a reference voltage, whereby the passage of ions through the ion modulation path, past the array of control electrodes to the imaging surface, is controlled.