Liquid supply container and method of manufacturing the same

A liquid supply container comprising:

• a storage portion configured to contain liquid;
• a liquid inlet/outlet portion forming member disposed at an opening end of the storage portion and including a cylindrical portion forming an inlet/outlet portion of the liquid;
• a valve disposed in the inlet/outlet portion and opening/closing communication between the storage portion and an outside;
• a holder member attached to an inside of the cylindrical portion and movably accommodating at least a valve body of the valve;
• and
• a seal member disposed in the liquid inlet/outlet portion forming member and constituting the valve together with the valve body, the valve body configured to be moved away from the seal member to make an opening portion communicating with the outside be in an open state and configured to be seated on the seal member to make the opening portion be in a closed state, wherein
• the cylindrical portion of the liquid inlet/outlet portion forming member forms a void portion surrounding the holder member in a circumferential direction between the cylindrical portion and the holder member, and
• a flange portion is disposed in the void portion and is part of the holder member or formed on an inner wall of the cylindrical portion, and between the valve body and the seal member, configured to perform division of the void portion into at least two portions in a moving direction of the valve body.

A liquid supply container comprising:

• a storage portion configured to contain liquid;
• a liquid inlet/outlet portion forming member disposed at an opening end of the storage portion and including a cylindrical portion forming an inlet/outlet portion of the liquid;
• a valve disposed in the inlet/outlet portion and opening/closing communication between the storage portion and an outside;
• a holder member attached to an inside of the cylindrical portion and movably accommodating at least a valve body of the valve;
• and
• a seal member disposed in the liquid inlet/outlet portion forming member and constituting the valve together with the valve body, the valve body configured to be moved away from the seal member to make an opening portion communicating with the outside be in an open state and configured to be seated on the seal member to make the opening portion be in a closed state, wherein
• the liquid inlet/outlet portion forming member includes a step portion, the step portion configured to form a recessed portion accommodating the seal member on a side axially opposite to an attachment portion that is attached to the storage portion,
• the holder member includes a seal member pressing portion secured to an inner peripheral wall of the recessed portion, the seal member pressing portion configured to press down the seal member accommodated in the recessed portion, and
• when a side closer to the opening portion in a moving direction of the valve body is defined as a tip side and a side closer to the storage portion is defined as a rear end side, a rear end of the seal member pressing portion is positioned further on the rear end side than a rear end of the seal member, and a rear end of the step portion is positioned further on the rear end side than the rear end of the seal member pressing portion.