Toner container and toner filling method

1. A toner container which is mountable and removable at a main body of an image forming apparatus, the toner container comprising:

at least one toner filling port provided in a casing body of the toner container;

an air vent port provided adjacent to the toner filling port and venting air from the casing body, the air vent being formed in a shape in which each segment connecting two points on two circles whose dimensions are different from each other are common between the two circles; and

a sealing member which covers the toner filling port, the air vent port, and a predetermined area of surroundings of the toner filling port and the air vent port, from an outer side of the casing body, for sealing toner inside the casing body,

wherein the sealing member includes transparency enabling identification of a color of the toner inside the casing body, and the sealing member includes an adhesive portion at a portion which covers the toner filling port and the air vent port,

wherein the adhesive portion at a portion which covers the toner filling port and the air vent port is provided at an inner side of the casing body, such that the toner in the casing body adheres to the adhesive portion,

wherein the toner filling port and the air vent port are provided in a side surface disposed at one end of a longitudinal direction, wherein the side surface having the longitudinal direction does not have the largest area among all planar sides that compose the toner container.

2. The toner container of claim 1 , wherein an adhesive portion is provided at the surroundings of the toner filling port.

3. The toner container of claim 1 , wherein the sealing member is structured with a base material including flexibility and an adhesive layer.

4. The toner container of claim 1 , wherein the toner filling port and the predetermined area of the surroundings of the toner filling port are recessed as a recess portion relative to an outer surface adjoining the predetermined area,

wherein a step difference between the recess portion and the outer surface of the toner container is equal to or more than a thickness of the sealing member.

5. The toner container of claim 1 , wherein a shape of the toner filling port is a shape other than a circle.

6. An image forming apparatus comprising the toner container of claim 1 .

7. A toner container which is mountable and removable at a main body of an image forming apparatus, the toner container comprising:

at least one toner filling port provided in a casing body of the toner container;

an air vent port provided adjacent to the toner filling port and venting air from the casing body, the air vent being formed in a shape in which each segment connecting two points on two circles whose dimensions are different from each other are common between the two circles; and

a sealing member which covers the toner filling port, the air vent port, and a predetermined area of surroundings of the toner filling port and the air vent port, from an outer side of the casing body, for sealing toner inside the casing body; and

an air vent for releasing air from inside the casing body, the toner filling port and the air vent both being covered with the sealing member,

wherein the sealing member includes transparency enabling identification of a color of the toner inside the casing body, and the sealing member includes an adhesive portion at a portion which covers the toner filling port and the air vent port,

wherein the adhesive portion at a portion which covers the toner filling port and the air vent port is provided at an inner side of the casing body, such that the toner in the casing body adheres to the adhesive portion,

wherein a shape of the toner filling port is a shape other than a circle; or a shape formed by the toner filing port and the air vent being provided so as to be linked to the toner filling port is a shape other than a circle,

wherein the toner filling port and the air vent port are provided in a side surface disposed at one end of a longitudinal direction, wherein the side surface having the longitudinal direction does not have the largest area among all planar sides that compose the toner container.

8. The toner container of claim 7 , wherein the air vent is adjacent to the toner filling port.