Inkjet recording apparatus and inkjet recording method
AssigneeToshiba Tec Kabushiki Kaisha
InventorNoboru NITTA
Life of this patent
Estimating the term…
Abstract
According to embodiments, an inkjet recording apparatus includes an ink tank which contains ink, a printing head which is connected to the ink tank through an ink channel and ejects the ink from a nozzle surface, and a channel member which is provided in the ink channel and has a clearance gap that connects the ink channel to the outside. The channel member is provided in a part of the ink channel, which has a positive pressure with respect to the atmospheric pressure at least during a period in which the printing head is capable of printing.
Claims17
1-15. (canceled)
An inkjet recording apparatus comprising:
- an upstream ink tank which contains ink;
- a printing head where a static pressure of ink close to a nozzle opening being set to negative pressure and ejects the ink from a nozzle for printing;
- an upstream ink channel which supplies ink contained in the upstream ink tank to the printing head;
- and
- an upstream coupling comprising a sliding portion which slides at attachment/detachment of head where an inner side contacts an ink and an outer side contacts atmospheric pressure, the upstream coupling being disposed in a part with a pressure of the inner side being a pressure of zero or more with respect to atmospheric pressure at least during a period in which the printing head is capable of printing and not disposed in a part with a pressure of an inner side being negative pressure.
An inkjet recording method comprising:
- connecting an upstream ink tank which contains ink to a printing head through an upstream ink channel and an upstream coupling for attachment/detachment of head;
- supplying ink contained in the upstream ink tank to the printing head;
- ejecting the ink from nozzle surface of the printing head for printing;
- and
- setting a static pressure of the ink close to a nozzle opening to negative pressure at least during a period in which the printing head is capable of printing;
- wherein an outer side of a sliding portion at attachment/detachment of the upstream coupling for attachment/detachment contacts atmospheric pressure and an ink of an inner side maintains a pressure of zero or more with respect to atmospheric pressure and an upstream ink channel with negative pressure is not provided with a coupling having the sliding portion at attachment/detachment.
Dependencies are inferred from the claim text.