Abstract: In the heating flow path unit, the entrance-side sealing member has an inflow restriction portion which restricts flow of liquid on a portion corresponding to an individual entrance-side opening of a liquid flow path in which flow rate is relatively high among the liquid flow paths.

Abstract: A liquid ejecting head includes a passage unit made by laminating a plurality of plates including a first plate having a first through-hole with a first size and a second plate having a second through-hole with a second size which is larger than the first size. The first plate and the second plate are bonded with adhesive so that the first through-hole and the second through-hole in communication with each other. The affinity for the adhesive to bond to the inner peripheral surface of the second through-hole is set to be at least higher than the affinity for the adhesive to bond to the area around the opening of the first through-hole. Adhesive that flows out from between the first plate and the second plate at the time of bonding of the first plate and the second plate is guided to the inner peripheral surface of the second through-hole.

Abstract: A liquid ejection head including: a flow channel unit including a nozzle plate, and a flow-channel-containing substrate, the nozzle plate and the flow-channel-containing substrate being laminated, a head case formed with a common liquid flow channel configured to supply the liquid to the reservoir and joined to the flow-channel-containing substrate on the side opposite from the nozzle plate; a heater configured to heat the nozzle plate; a head cover heated by the heater and formed with a bottom surface portion opposing the nozzle plate on the side opposite from the head case, wherein a distal end of the head cover comes into abutment with a portion between an area of the nozzle plate corresponding to the reservoir and an area formed with the nozzle row, and a void is formed between the area of the nozzle plate corresponding to the reservoir and the head cover.

Abstract: A liquid ejecting head includes a plurality of nozzle openings, a first flow path, a supply path, a recovery path, a first filter, a second filter, and a second flow path. The nozzle openings eject a liquid, the first flow path is communicated with the plurality of nozzle openings and the liquid is circulated through the first flow path. The supply path supplies the liquid to the first flow path from the outside, and the recovery path recovers the liquid from the first flow path to the outside. The first filter is provided in the supply path and the second filter is provided in the recovery path. The second flow path connects the supply path provided in the upstream side of the first filter and the recovery path provided in downstream side of the second filter.

Abstract: A liquid ejecting head comprising, a plurality of nozzle openings, a first flow passage, a circulation flow passage, a filter chamber, and a bypass flow passage, an inner diameter of the bypass flow passage is larger than a diameter of the hole of the filter, the inner diameter of the bypass flow passage is larger than a diameter of the nozzle opening, and a flow passage resistance of the bypass flow passage is larger than a flow passage resistance of the circulation flow passage from a branch point where the bypass flow passage branches from the supply passage to a junction point where the bypass flow passage merges into the collection passage.

Abstract: A control apparatus includes a discharge control unit, wherein the discharge control unit controls liquid so that, before a start of printing of which the printing is performed on a printing medium by ejecting a liquid, which is filled and heated within flow passages, from a nozzle opening, the liquid within the flow passages of the liquid ejecting head is discharged from the nozzle opening, and, after the liquid ejecting head is heated to a printing temperature by the heated liquid and the liquid ejecting head reaches the printing temperature, discharging of the liquid from the nozzle opening is stopped.

Abstract: The invention provides a liquid ejecting head which is capable of introducing liquid from a liquid storage member to a pressure chamber through a liquid flow channel and discharging the liquid in the pressure chamber from a nozzle opening as liquid drops by an operation of pressure generating means including: a filter chamber in the middle of the liquid flow channel, the filter chamber having a diameter larger than other portions of the liquid flow channel and having a filter disposed therein for filtering the liquid in the liquid flow channel, wherein the filter chamber includes a liquid repellent area having a static contract angle with respect to liquid larger than that of the inner wall on the downstream side of the filter formed on the inner wall in the vicinity of the filter on the upstream side thereof.

Abstract: A liquid ejecting apparatus includes a first flow path for supplying liquid, a second flow path that communicates with the first flow path, a filter disposed to face communication holes of the first and second flow paths, and an air bubble locking section that locks an air bubble in the communication hole of the second flow path at a time when the air bubble is discharged from the second flow path through the filter.

Abstract: A liquid supply apparatus includes a liquid supply passage that supplies liquid from an upstream liquid supply source side to a downstream side where the liquid is consumed and a filter chamber midway in the liquid supply passage. The filter chamber has a filter that catches air bubbles in the liquid. The liquid supply passage has a pressure chamber upstream of the filter chamber. The pressure chamber is defined by a first movable wall that moves upon receiving pressure in the pressure chamber and by a second movable wall. The second movable wall receives force from the first movable wall upon displacement thereof. The second movable wall displaces toward the side of reducing the volume of the filter chamber by the force transmitted by the first movable wall when the pressure chamber and the filter chamber are pressurized from upstream side of the pressure chamber.

Abstract: A liquid ejecting head includes a passage unit made by laminating a plurality of plates including a first plate having a first through-hole with a first size and a second plate having a second through-hole with a second size which is larger than the first size. The first plate and the second plate are bonded with adhesive so that the first through-hole and the second through-hole in communication with each other. The affinity for the adhesive to bond to the inner peripheral surface of the second through-hole is set to be at least higher than the affinity for the adhesive to bond to the area around the opening of the first through-hole. Adhesive that flows out from between the first plate and the second plate at the time of bonding of the first plate and the second plate is guided to the inner peripheral surface of the second through-hole.

Abstract: The invention provides a liquid ejecting head which is capable of introducing liquid from a liquid storage member to a pressure chamber through a liquid flow channel and discharging the liquid in the pressure chamber from a nozzle opening as liquid drops by an operation of pressure generating means including: a filter chamber in the middle of the liquid flow channel, the filter chamber having a diameter larger than other portions of the liquid flow channel and having a filter disposed therein for filtering the liquid in the liquid flow channel, wherein the filter chamber includes a liquid repellent area having a static contract angle with respect to liquid larger than that of the inner wall on the downstream side of the filter formed on the inner wall in the vicinity of the filter on the upstream side thereof.

Abstract: A liquid ejecting apparatus includes a first flow path for supplying liquid, a second flow path that communicates with the first flow path, a filter disposed to face communication holes of the first and second flow paths, and an air bubble locking section that locks an air bubble in the communication hole of the second flow path at a time when the air bubble is discharged from the second flow path through the filter.