公开(公告)号：US20200378406A1

公开(公告)日：2020-12-03

申请号：US16884321

申请日：2020-05-27

Applicant: SEIKO EPSON CORPORATION

Inventor： Yukihiro HANAOKA ,  Toshiro MURAYAMA ,  Daiki TATSUTA

IPC: F15B1/26 ,  F16K31/06 ,  F15B7/06

Abstract: A first valve mechanism is a valve mechanism provided in a flow path coupled to a liquid ejecting head that ejects a liquid, and including a valve that opens/closes the flow path, a first communication liquid chamber that communicates with the flow path, and a first pressure receiving body that converts a pressure difference between a pressure of the first communication liquid chamber and a reference pressure into an operating force of the valve, in which a threshold pressure of the first communication liquid chamber for determining opening/closing of the valve is variable.

公开(公告)号：US20200298598A1

公开(公告)日：2020-09-24

申请号：US16821408

申请日：2020-03-17

Applicant: SEIKO EPSON CORPORATION

Inventor： Daiki TATSUTA ,  Masaaki ANDO ,  Junya SUZUKI ,  Takao YAMAMOTO ,  Ken YAMAGISHI

IPC: B41J25/34

Abstract: A liquid ejecting unit includes: a liquid ejecting head; and a coupling member coupled to the liquid ejecting head, in which the liquid ejecting head has a first-coupling portion and a second-coupling portion, the liquid ejecting unit further includes: a first-attachment portion provided in a first-position of the coupling member; a second-attachment portion provided in a second-position of the coupling member, the second position being different from the first position; a first-elastic body; and a second-elastic body, and the first-elastic body biases the first-attachment portion or the first-coupling portion in a state in which the first-attachment portion is in contact with the first-coupling portion and the second-elastic body biases the second-attachment portion or the second-coupling portion in a state in which the second-attachment portion is in contact with the second-coupling portion, so that the coupling member is coupled to the liquid ejecting head.

公开(公告)号：US20200298568A1

公开(公告)日：2020-09-24

申请号：US16821387

申请日：2020-03-17

Applicant: SEIKO EPSON CORPORATION

Inventor： Daiki TATSUTA ,  Osamu MURAYAMA ,  Junya SUZUKI

IPC: B41J2/14

Abstract: A liquid ejecting unit includes: a liquid ejecting head configured to eject a liquid; a flow channel member that is attached to the liquid ejecting head and that supplies the liquid to the liquid ejecting head; and an electric coupling member configured to supply a signal to the liquid ejecting head, in which the electric coupling member has a first electric coupling portion, the liquid ejecting head has a second electric coupling portion electrically coupled to the first electric coupling portion, and the flow channel member restricts the electric coupling member from moving in a direction in which the first electric coupling portion is removed from the second electric coupling portion.

公开(公告)号：US20200338885A1

公开(公告)日：2020-10-29

申请号：US16857639

申请日：2020-04-24

Applicant: SEIKO EPSON CORPORATION

Inventor： Daiki TATSUTA ,  Ken YAMAGISHI ,  Masumi HAYAKAWA

IPC: B41J2/14 ,  B41J2/175

Abstract: A liquid discharge unit includes a liquid discharge head having a first joint portion and configured to discharge a liquid in a first direction, a liquid supply section having a second joint portion joined to the first joint portion to supply the liquid to the liquid discharge head, and disposed in a second direction opposite to the first direction relative to the liquid discharge head, and a support section which is formed together with the liquid discharge head, and to which the liquid discharge head is fixed. With respect to the first direction, a position at which the liquid supply section is fixed to the support section is located in the second direction with respect to a position at which the first joint portion and the second joint portion are joined to each other.

公开(公告)号：US20180215163A1

公开(公告)日：2018-08-02

申请号：US15866298

申请日：2018-01-09

Applicant: SEIKO EPSON CORPORATION

Inventor： Masahiko SATO ,  Hiroyuki HAGIWARA ,  Daiki TATSUTA

IPC: B41J2/175

Abstract: A liquid discharge apparatus includes a filter chamber that is provided in a flow path that supplies liquid to a liquid discharge unit, a filter that partitions the filter chamber into an upstream side chamber to which the liquid is supplied and a downstream side chamber that communicates with the liquid discharge unit, a storage chamber that is arranged vertically above the filter chamber and is connected to a branch of the flow path on the upstream side of the upstream side chamber of the filter chamber, and a pump that supplies the liquid to the flow path.

公开(公告)号：US20210213736A1

公开(公告)日：2021-07-15

申请号：US17143406

申请日：2021-01-07

Applicant: SEIKO EPSON CORPORATION

Inventor： Yoji TAKAHASHI ,  Osamu MURAYAMA ,  Daiki TATSUTA

IPC: B41J2/145 ,  B41J29/393 ,  B41J2/175

Abstract: A printing apparatus includes a head unit having a support portion configured to support a plurality of heads capable of discharging a droplet in a discharge direction, and a carriage on which the head unit is removably mounted from upstream in the discharge direction, wherein the carriage has a bottom formed with an opening from which a nozzle surface of the head for discharging the droplet is exposed, the support portion is provided with at least one protruding portion protruding from a bottom surface of the support portion in the discharge direction, and the bottom is provided with an insertion hole through which the at least one protruding portion is inserted, and a biasing member biasing the support portion in an intersecting direction intersecting with the discharge direction in a state where the at least one protruding portion is inserted through the insertion hole.

公开(公告)号：US20200298580A1

公开(公告)日：2020-09-24

申请号：US16820768

申请日：2020-03-17

Applicant: SEIKO EPSON CORPORATION

Inventor： Daiki TATSUTA ,  Osamu MURAYAMA ,  Yoji TAKAHASHI

IPC: B41J2/175 ,  B41J2/16 ,  B41J2/14

Abstract: A liquid ejecting unit includes: a liquid ejecting head configured to eject a liquid; a holding portion holding the liquid ejecting head; a coupling member; and a first fixing member fixing the liquid ejecting head to the holding portion, in which the coupling member is provided with a first coupling portion and a first through-hole, the liquid ejecting head is provided with a second coupling portion that is configured to be coupled to the first coupling portion, and the first fixing member passes through the first through-hole in a state in which the first coupling portion and the second coupling portion are coupled to each other.

公开(公告)号：US20180207944A1

公开(公告)日：2018-07-26

申请号：US15865876

申请日：2018-01-09

Applicant: SEIKO EPSON CORPORATION

Inventor： Daiki TATSUTA ,  Ryoji FUJIMORI ,  Kaoru KOIKE

IPC: B41J2/19

CPC classification number: B41J2/19 ,  B41J2/175

Abstract: A liquid ejecting apparatus includes a liquid flow path which communicates with a nozzle which ejects liquid; a vacuum degassing chamber for removing air bubbles from liquid by depressurizing a part of the liquid flow path; a gas flow path which communicates with the vacuum degassing chamber; a pressurizing chamber which communicates with the gas flow path; and a pump which communicates with the vacuum degassing chamber and the pressurizing chamber through the gas flow path, in which the pump is driven by a sequence selected from a plurality of sequences, and the plurality of sequences include a plurality of depressurizing sequences in which the vacuum degassing chamber is depressurized so that an average pressure of the vacuum degassing chamber becomes different, and a pressurizing sequence in which the pressurizing chamber is pressurized.