Development apparatus and method using selectively applied AC voltages

A development apparatus comprising:

• a developer carrier member opposing an image bearing member across a development region;
• a recovery member adjoining said developer carrier member and opposing the image bearing member;
• and
• an AC voltage applying device for selectively applying AC voltages to said developer carrier member and said recovery member, the AC voltage applying device controlled so as not apply the AC voltage to the recovery member when applying the AC voltage to the developer carrier member.

A development apparatus comprising:

• a developer carrier member opposing an image bearing member across a development region;
• an electrode member disposed in said development region as interposed between the image bearing member and the developer carrier member;
• and
• an AC voltage applying device for selectively applying AC voltages to said developer carrier member and said recovery member, the AC voltage applying device controlled so as not to apply the AC voltage to the recovery member when applying the AC voltage to the developer carrier member.

A development method comprising the steps of:

• applying an AC voltage to a developer carrier member opposing an image bearing member across a development region;
• applying an AC voltage to a recovery member adjoining the developer carrier member and opposing the image bearing member;
• and
• controlling the application of the AC voltages in a manner that when the AC voltage is applied to the developer carrier member, no AC voltage is applied to the recovery member.

A development method comprising the steps of:

• applying an AC voltage to a developer carrier member opposing an image bearing member across a development region;
• applying an AC voltage to an electrode member disposed in the development region as interposed between the image bearing member and the developer carrier member;
• and
• controlling the application of the AC voltages in a manner that when the AC voltage is applied to the developer carrier member, no AC voltage is applied to the electrode member.