Inkjet head, filter plate for inkjet head, and method of manufacturing filter plate
AssigneeBrother Kogyo Kabushiki Kaisha
InventorTadanobu Chikamoto
Life of this patent
Estimating the term…
Abstract
An ink channel is formed in an inkjet head, so that ink introduced through an ink inlet passes through a pressure chamber and is ejected out of a nozzle. A filter for filtering the ink is disposed in the ink channel. The filter includes a depression formed in a plate, and a plurality of through-holes formed in the bottom of the depression. The filter has small channel resistance and is easy to handle.
Claims23
An inkjet head, comprising:
- a plurality of laminated plates, the plates having holes that are arranged in communication with one another to form an ink channel,
- at least one of the plurality of plates including a filter portion disposed in the ink channel, the filter portion including a bottom wall portion defining a depression thereon, a plurality of filter through-holes being formed through the bottom wall portion, wherein an area of an opening in each filter through-hole on an upstream side of the ink channel in an ink flowing direction through the filter portion is smaller than an area of another opening in the subject filter through-hole on a downstream side of the ink channel.
A filter plate for an inkjet head, the inkjet head including a plurality of laminated plates, the plurality of plates including the filter plate, the plurality of laminated plates having holes that are arranged to form an ink channel, the filter plate comprising:
- a filter portion, which is disposed in the ink channel which is formed when the plurality of plates are laminated together, the filter portion including a bottom wall portion defining a depression thereon, a plurality of filter through-holes being formed through the bottom wall portion, wherein an area of an opening in each filter through-hole on an upstream side of the ink channel in an ink flowing direction through the filter portion is smaller than an area of another opening in the subject filter through-hole on a downstream side of the ink channel.
A method of manufacturing a filter plate serving as a component of an inkjet head including a plurality of laminated plates, the plates having holes that are arranged to form an ink channel, the filter plate having a filter portion that traps foreign matter in ink in the ink channel, the method comprising:
- forming a plurality of holes within a predetermined region on one surface of a metal plate, the holes having a depth smaller than the thickness of the metal plate;
- and
- forming filter through-holes penetrating the metal plate by etching a depression across the entire predetermined region on the opposite surface of the metal plate, the depression connecting the holes, thereby forming through-holes.
A filter plate for an inkjet head, the inkjet head including a plurality of laminated plates including the filter plate, the plurality of laminated plates having holes that are arranged to form an ink channel, the filter plate being formed with a depression that is to be located in the ink channel when the plurality of plates are laminated together, a plurality of filter through-holes being formed through a bottom portion of the depression, wherein an area of an opening in each filter through-hole on an upstream side of the ink channel in an ink flowing direction through the filter portion is smaller than an area of another opening in the subject filter through-hole on a downstream side of the ink channel.
An inkjet head, comprising:
- a plurality of laminated plates, the plates having holes that are arranged in communication with one another to form an ink channel, at least one of the plurality of plates being formed with a depression at a location in the ink channel, a plurality of filter through-holes being formed through a bottom of the depression, wherein an area of an opening in each filter through-hole on an upstream side of the ink channel in an ink flowing direction through the filter portion is smaller than an area of another opening in the subject filter through-hole on a downstream side of the ink channel.
Dependencies are inferred from the claim text.