Charge-eliminating apparatus, image forming system, and charge adjusting apparatus

A charge adjusting apparatus comprising:

• a charge applying member configured to be in contact with a sheet and apply charges to the sheet while the charge applying member, together with an opposing charge applying member disposed at a position where the opposing charge applying member faces the charge applying member, nips and conveys the sheet;
• a power supply configured to apply a voltage to the charge applying member;
• a current detection circuit configured to detect a current flowing through the charge applying member;
• and
• a control unit configured to control a value of the voltage applied to the charge applying member by the power supply, based on a detection result obtained by the current detection circuit while the charge applying member nips and conveys the sheet, such that the current flowing through the charge applying member while the charge applying member nips and conveys the sheet represents a value within a predetermined range with respect to a target value,
• wherein the control unit acquires a detection result of an environment detection sensor that detects an environmental condition, and
• wherein the control unit changes the target value based on the detection result of the environment detection sensor during execution of a job that adjusts charges on a plurality of sheets while continuously conveying the plurality of sheets.

An image forming system comprising:

• an image forming section configured to form an image on a sheet;
• a charge-eliminating member configured to be in contact with a sheet and eliminate static charges from the sheet while the charge-eliminating member, together with an opposing charge-eliminating member disposed at a position where the opposing charge-eliminating member faces the charge-eliminating member, nips and conveys the sheet;
• a power supply configured to apply a voltage to the charge-eliminating member;
• a current detection circuit configured to detect a current flowing through the charge-eliminating member;
• a control unit configured to control a value of the voltage applied to the charge-eliminating member by the power supply, based on a detection result obtained by the current detection circuit while the charge-eliminating member nips and conveys the sheet, such that the current flowing through the charge-eliminating member while the charge-eliminating member nips and conveys the sheet falls within a predetermined range with respect to a target value;
• and
• an environment detection sensor configured to detect an environmental condition,
• wherein the control unit acquires a detection result of the environment detection sensor that detects an environmental condition, and
• wherein the control unit changes the target value based on the detection result of the environment detection sensor during execution of a job that eliminates static charges from a plurality of sheets while continuously conveying the plurality of sheets.