Patent ID: 11885426
Assignee: SEIKO EPSON CORPORATION
Field: Other special machines (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 1:
2. The method for manufacturing a liquid flow path member according to claim 1, the method further comprising:
forming a convex portion protruding around an entire periphery of the liquid flow path at the joining surface of the check valve holding member that is joined to the second flow path member, wherein
the welding step includes,
melting the convex portion by the laser light while pressurizing the convex portion against the second flow path member or while pressurizing the second flow path member against the convex portion, causing the melted convex portion to extend to a region where the check valve holding member and the second flow path member are joined, and a region where the first flow path member and the second flow path member are joined, and thereby welding the joining surface of the check valve holding member to the second flow path member, and welding the joining surface of the first flow path member to the second flow path member.