US 11,885,426 B2
Liquid flow path member and method for manufacturing liquid flow path member
Takayoshi Mizuno, Shiojiri (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Nov. 18, 2020, as Appl. No. 16/951,468.
Claims priority of application No. 2019-211162 (JP), filed on Nov. 22, 2019.
Prior Publication US 2021/0156488 A1, May 27, 2021
Int. Cl. F16K 27/10 (2006.01); B23K 26/18 (2006.01); B23K 26/21 (2014.01); B23K 26/57 (2014.01); B23K 101/04 (2006.01)
CPC F16K 27/102 (2013.01) [B23K 26/18 (2013.01); B23K 26/21 (2015.10); B23K 26/57 (2015.10); B23K 2101/04 (2018.08)] 3 Claims
OG exemplary drawing
 
1. A method for manufacturing a liquid flow path member including
a first flow path member constituting one side of a liquid flow path,
a second flow path member constituting another side of the liquid flow path, and
a check valve including a valve body configured to stop a backflow of the liquid in the liquid flow path and a check valve holding member configured to hold the valve body, the method comprising:
a welding step for welding the first flow path member or the second flow path member to the check valve holding member, and also welding the first flow path member to the second flow path member;
forming the first flow path member and the check valve holding member using a laser light absorbing material; and
forming the second flow path member using a laser light transmissive material, wherein the welding step includes
welding the first flow path member to the second flow path member by melting a joining surface of the first flow path member that is joined to the second flow path member, with laser light passing through the second flow path member; and
welding the check valve holding member to the second flow path member by melting a joining surface of the check valve holding member that is joined to the second flow path member, with the laser light passing through the second flow path member.