Liquid jet head
AssigneeSeiko Epson Corporation
InventorNoriaki Okazawa
Life of this patent
Estimating the term…
Abstract
A liquid jet head and apparatus prevent an increase in the viscosity of liquid in the liquid path during long term storage. The recording head has a liquid path unit 1 with nozzle openings 8, pressure generation chambers 7, liquid reservoirs 9, and a diaphragm 5, and a head case 2 bonded to the liquid path unit 1. A damper chamber 12 for releasing pressure change inside the liquid reservoir is formed at a part of the head case or seal plate 5 corresponding to the liquid reservoir 9. A release path 14B for releasing pressure in the damper chamber to the air is formed in the head case. A control path 14A communicating with the damper chamber and release path and having a specific flow resistance restricting dispersion of moisture vapor from the liquid is formed in the head case and/or seal plate.
Claims23
A liquid jet head comprising:
- a nozzle opening;
- a pressure generation chamber communicating with the nozzle opening;
- a liquid reservoir operable to store liquid supplied to the pressure generation chamber;
- a liquid path unit including the pressure generation chamber and a seal plate operable to cover an opening of the liquid reservoir;
- a head case connected to a liquid path;
- a damper chamber operable to accommodate a pressure change in the liquid reservoir formed proximate to the liquid reservoir in the head case or seal plate:
- a release path formed in the head case operable to release pressure in the damper chamber;
- and
- a control path formed in the head case or seal plate with flow resistance imparted thereto operable to restrict moisture dispersion while communicating the damper chamber to the release path.
A liquid jet head comprising:
- a damper chamber operable to ease pressure generated when liquid is supplied from a liquid cartridge to said liquid jet head, said damper chamber comprising two sub-chambers separated by a film, wherein one of the sub-chambers is a liquid reservoir operable to store the liquid and the second sub-chamber is an air chamber operable to retain air, and
- a control path operatively associated with the air chamber and operable to restrict moisture dispersion.
Dependencies are inferred from the claim text.