Patent ID: 11958294
Assignee: SEIKO EPSON CORPORATION
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A cartridge that is detachably mounted in a liquid ejecting apparatus including a liquid introduction portion with an introduction portion flow path, comprising:
a liquid accommodating portion for accommodating a liquid;
a liquid supply portion having a central axis and having a supply portion flow path which communicates with the liquid accommodating portion; and
a valve mechanism arranged in the supply portion flow path, closed in an unmounted state in which the cartridge is not mounted in the liquid ejecting apparatus to bring the supply portion flow path into a non-communication state, and opened in a mounted state in which the cartridge is mounted in the liquid ejecting apparatus to bring the supply portion flow path into a communication state, wherein
the valve mechanism has
a valve seat having an insertion port into which the liquid introduction portion is inserted,
a valve body having a closing surface which abuts on the valve seat to close the insertion port and located upstream of the valve seat in a circulating direction of the liquid in the supply portion flow path when the liquid is supplied, and
a biasing member biasing the valve body toward the valve seat,
the valve mechanism is opened by the valve body being pushed by the liquid introduction portion and being separated from the valve seat,
the closing surface has a flat surface portion, and an inclined surface portion formed around the flat surface portion and inclined toward an edge of the closing surface so that the edge is located upstream of the valve seat in the circulating direction, and at least a part of the inclined surface portion faces the introduction portion flow path in the mounted state, and
the inclined surface portion abuts on the valve seat when the liquid is not supplied.