Seiko Epson Corporation

Satoshi Inomata

Akihiro Toya

Hiroyuki Nakamura

Hiroyuki Motoyama

Kiyomi Kuroda

Shunichi Hizawa

Takanori Matsuda

A liquid discharge apparatus includes a liquid discharge head configured to discharge liquid. The liquid discharge apparatus includes a reservoir configured to store liquid to be supplied to the liquid discharge head. The reservoir is provided at a position lower than the liquid discharge head. The liquid discharge apparatus includes a supply flow path configured to communicate with the liquid discharge head and the reservoir. The supply flow path is provided with a joint detachable from the liquid discharge head. The liquid discharge apparatus includes a retainer configured to retain the joint detached from the liquid discharge head. The joint has a coupler to be coupled to the liquid discharge head. The retainer is configured to retain the joint with the coupler facing up.

Liquid discharge apparatus

A tank unit is configured to introduce liquid supplied from a container and to lead out liquid toward a head configured to eject the liquid. The tank unit includes a storage section that stores the liquid supplied from the container, an introduction section that introduces the liquid supplied from the container into the storage section, an atmosphere opening section configured to open inside of the storage section to atmosphere, and an outlet section that leads out the liquid stored in the storage section. The introduction section is connected to the storage section, extends in a vertical direction in the storage section, and has an open end located within the storage section. The storage section includes a blocking section including a first protruding section located at a position in the vertical direction facing the open end and a second protruding section extending upward from the first protruding section.

Tank unit and liquid ejection apparatus

A liquid circulating device has: a supply flow path through which a liquid is supplied from a liquid supply source that stores the liquid to a liquid ejecting head that ejects the liquid; a collection flow path through which the liquid collected from the liquid ejecting head is returned to the supply flow path; and a liquid flowing portion that causes the liquid to flow in a circulation flow path including the supply flow path, the liquid ejecting head, and the collection flow path. An air capturing portion can capture bubbles and is provided in at least one of the supply flow path and collection flow path. The air capturing portion is disposed at a position higher than the position of the liquid ejecting head.

Liquid circulating device, liquid discharging apparatus, and bubble exhausting method in liquid discharging apparatus

A liquid ejecting apparatus includes a liquid ejecting portion that performs printing by ejecting a liquid to a medium from a plurality of nozzles, a first mounting portion that is configured to mount a first liquid container that contains the liquid, a second mounting portion that is configured to mount a second liquid container having a liquid containing amount smaller than a liquid containing amount of the first liquid container, a detecting portion that detects a remaining amount of the liquid contained in the first liquid container mounted in the first mounting portion, and a control portion that calculates a remaining amount of the liquid contained in the second liquid container, based on a standard value representing an amount of the liquid contained in the second liquid container and a standard value representing an ejection amount of the liquid ejected from the liquid ejecting portion.

Liquid ejecting apparatus

An inkjet printer can appropriately flush two inkjet heads disposed to a carriage. The inkjet printerflushes the first inkjet headA before printing starts when print data is received (step ST), and flushes a second inkjet headB while the carriagereturns from the printing area C to the home position A after printing ends (steps ST, ST). As a result, because the carriageis not moved from the home position A before printing starts, the start of printing is not delayed. Furthermore, because the direction of carriagemovement does not change after the second inkjet headB is flushed, the carriagereturns to the home position A quickly. Starting printing the next print data is therefore not delayed.

Flushing control method for an inkjet printer, and an inkjet printer

A control method for a fluid ejection device and a fluid ejection device reliably eliminate dropped dots while reducing consumption of ink droplets ejected from the nozzles. A fluid ejection device that performs at least one of a cleaning operation that suctions fluid from the nozzles and a wiping operation that wipes the nozzle surface when dropped dots occur determines if an elimination history of removing dropped dots by the wiping operation is stored when dropped dots are detected as a result of testing for dropped dots and determining if dropped dots occur. When a history of eliminating dropped dots by means of a wiping operation is not stored, the fluid ejection device performs the wiping operation. When a history of eliminating dropped dots by means of a wiping operation remains in memory, the cleaning operation is performed without the wiping operation.

Control method for a fluid ejection device, and a fluid ejection device

A method of inspecting a discharge state of a nozzle prevents wrongly determining that discharge is normal even though fluid droplets are not discharged normally. In a fluid droplet discharge device such as an inkjet printer, a momentary induced current is produced when a charged ink dropletlands on a head capwith a potential difference. A voltage change detection unitdetects the induced current as a voltage change. A decision unitdetermines that the ink discharge state is normal if the maximum amplitude L of the voltage change detected by the voltage change detection unitin a first period S is greater than or equal to a first threshold value Q. If the amplitude of voltage change detected in a third period U after the specific period has passed goes to a second threshold value R, a decision cancellation unitdetermines that noise is contained in the voltage change. If the ink discharge state is determined to be normal and noise is determined to be contained in the voltage change, inspection is repeated and the normal discharge decision is cancelled.

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Shiojiri, Japan

Satoshi Inomata