Image forming apparatus having developing apparatus with filter covering vent opening and shutter to shield opening

An image forming system comprising:

• (i) a toner container including a first storage unit configured to store toner, and a discharge unit provided with a discharge port through which the toner is discharged from the first storage unit out of the toner container;
• and
• (ii) an image forming apparatus including:
• (u-i) a development unit including:
• (ii-i-i) a developing roller;
• (ii-i-ii) a second storage unit configured to store toner to be carried by the developing roller;
• (ii-i-iii) an attachment unit to and from which the toner container is attachable and detachable, and provided with a reception port configured to receive toner from the toner container to the second storage unit;
• (ii-i-iv) an opening through which an inside of the second storage unit and an outside of the second storage unit communicate with each other;
• (ii-i-v) a filter configured to cover the opening, permit a passage of air and a passage of toner;
• and
• (ii-i-vi) a main unit shutter movable between a non-communication position where the discharge port of the discharge unit does not communicate with the reception port and a communication position where the discharge port of the discharge unit communicates with the reception port, and configured to shield the opening when the main unit shutter is located at the non-communication position and open the opening when the main unit shutter is located at the communication position.

A development apparatus to and from which a toner container is attachable and detachable, the development apparatus comprising:

• a developing roller;
• a storage unit configured to store toner to be carried by the developing roller;
• an attachment unit to and from which the toner container is attachable and detachable, and provided with a reception port configured to receive toner from the toner container to the storage unit;
• an opening through which an inside of the storage unit and an outside of the storage unit communicate with each other,
• a filter configured to cover the opening;
• and
• a moving member configured to rotate between a shielding position where the opening is shielded and an open position where the opening is opened, and is located at the shielding position in a case where the toner container is not attached to the attachment unit, and is located at the open position at least when toner is receivable from the toner container to the storage unit via the reception port in a case where the toner container is attached to the attachment unit.

An image forming system comprising:

• (i) a toner container including a first storage unit configured to store toner, and a discharge unit provided with a discharge port configured to discharge the toner from the first storage unit out of the toner container;
• and
• (ii) an image forming apparatus including:
• (u-i) a development unit including:
• (ii-i-i) a developing roller;
• (ii-i-ii) a second storage unit configured to store toner to be carried by the developing roller;
• (ii-i-iii) an attachment unit to and from which the toner container is attachable and detachable, and provided with a reception port configured to receive toner from the toner container to the second storage unit;
• (ii-i-iv) an opening through which an inside of the second storage unit and an outside of the second storage unit communicate with each other;
• (ii-i-v) a filter configured to cover the opening, permit a passage of air and disturb a passage of toner;
• and
• (ii-i-vi) a moving member configured to rotate between a shielding position where the opening is shielded and an open position where the opening is opened, and is located at the shielding position in a case where the toner container is not attached to the attachment unit, and is located at the open position at least when toner is receivable from the toner container to the storage unit via the reception port in a case where the toner container is attached to the attachment unit.