Recording head unit
AssigneeSeiko Epson Corporation
InventorsHiroshige Owaki, Fujio Akahane, Takayuki Iijima, Katsuhiro Okubo
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Abstract
Ink flow paths are formed that corresponds in number to the ink chambers of a mounted ink cartridge, to supply ink from the ink chambers to a recording head. These ink flow paths are constituted by first communication paths (59, 60), which communicate with the ink outlets of corresponding ink chambers, second communication paths (61, 67), which communicate with the corresponding ink inlets of the recording head, and convergent flow paths (65), which connect the first and the second communication paths and converge as they approach the recording head. Filters (56) are located in the second communication paths.
Claims50
A recording unit comprising:
- a cartridge holder adapted to replaceably mount at least one ink cartridge defining a plurality of ink chambers;
- a recording head, for ejecting ink in response to activation of a pressure generating element;
- a plurality of ink flow paths through which ink in the ink chambers is supplied to the recording head, respectively, each of the ink flow paths including a first communication path communicated with an ink outlet of the corresponding ink chamber, a second communication path communicated with a corresponding ink inlet of the recording head, and a convergent flow path communicating the first communication path with the second communication path, convergent flow paths being arranged to converge toward the recording head;
- and
- a filter respectively disposed in each of second communication paths;
- wherein the filter is disposed in only an opening portion of the second communication path connected with an end of the convergent flow path.
A recording head unit comprising:
- a cartridge holder adapted to replaceably mount at least one ink cartridge defining a plurality of ink chambers;
- a recording head for ejecting ink in response to activation of a pressure generating element;
- a plurality of ink flow paths through which ink in the ink chambers is supplied to the recording head, respectively, each of the ink flow paths including a first communication path communicated with an ink outlet of the corresponding ink chamber, a second communication path communicated with a corresponding ink inlet of the recording head, and a convergent flow path communicating the first communication path with the second communication path, convergent flow paths being arranged to converge toward the recording head;
- and
- a filter respectively disposed in each of second communication paths,
- wherein the filter is disposed on a position in the second communication path lower than a bottom of the convergent flow path extended in a substantially horizontal direction.
Dependencies are inferred from the claim text.