Image forming device and image forming apparatus

An image forming device, comprising:

• a toner bearer, comprising:
• plural linear electrodes aligned at a first regular pitch in a crosswise direction of the toner bearer;
• a surface electrode disposed in a longitudinal direction;
• and
• an insulative layer located between the linear electrodes and the surface electrode,
• the toner bearer configured to cause toner to fly along the surface thereof upon application of pulse voltages having phases opposite to each other to the linear electrodes and the surface electrode to form a floating toner layer;
• and
• a substrate comprising plural hole-electrode combinations, each formed of a through-hole and a hole-adjacent electrode located close to the through-hole,
• wherein the floating toner layer is formed in an area facing the through-hole, and toner passes through only the through-holes facing a desired image from the floating toner layer upon application of a record-on voltage for recording a dot or a record-off voltage for not recording a dot, and
• wherein the plural hole-electrode combinations arranged in a longitudinal direction of the linear electrodes are lined at a second regular pitch in a crosswise direction of the toner bearer, and the second regular pitch is an integral multiple of the first regular pitch.

An image forming apparatus, comprising:

• a feeder configured to feed a recording medium;
• a transporter configured to transport the recording medium;
• an image forming device configured to form a tone image on an intermediate transferer or the recording medium;
• and
• a fixer configured to fix the toner image on the recording medium,
• wherein the image forming device comprises:
• a toner bearer, comprising:
• plural linear electrodes located at a first regular pitch in a crosswise direction of the toner bearer;
• and
• a surface electrode in a longitudinal direction;
• and
• an insulative layer located between the linear electrodes and the surface electrode,
• the toner bearer configured to cause toner to fly along the surface thereof upon application of pulse voltages having phases opposite to each other to the linear electrodes and the surface electrode to form a floating toner layer;
• and
• a substrate comprising plural hole-electrode combinations, each formed of a through-hole and a hole-adjacent electrode located close to the through-hole,
• wherein the floating toner layer is formed in an area facing the through-hole, and a toner passes through only the through-holes facing a desired image from the floating toner layer upon application of a record-on voltage for recording a dot or a record-off voltage for not recording a dot, and
• wherein the plural hole-electrode combinations arranged in a longitudinal direction of the linear electrodes are lined at a second regular pitch in a crosswise direction of the toner bearer, and the second regular pitch is an integral multiple of the first regular pitch.