Invention Grant
- Patent Title: Liquid ejection head, liquid-droplet ejection device, and image forming apparatus
- Patent Title (中): 液体喷射头,液滴喷射装置和图像形成装置
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Application No.: US12822522Application Date: 2010-06-24
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Publication No.: US08348407B2Publication Date: 2013-01-08
- Inventor: Ryouta Matsufuji , Hideyuki Makita , Tadashi Mimura , Satoru Tobita , Tomohiko Koda
- Applicant: Ryouta Matsufuji , Hideyuki Makita , Tadashi Mimura , Satoru Tobita , Tomohiko Koda
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Cooper & Dunham LLP
- Priority: JP2009-154180 20090629; JP2010-042389 20100226
- Main IPC: B41J2/175
- IPC: B41J2/175

Abstract:
A liquid ejection head includes nozzles, separate chambers, a common chamber, inlet portions, a filter unit, and ribs. Droplets of liquid are ejected from the nozzles. The separate chambers are communicated with the nozzles. The inlet portions are communicated with the corresponding separate chambers. Liquid is supplied from the common chamber to the separate chambers through the inlet portions. The filter unit is disposed between the inlet portions and the common chamber to filter liquid in an area across the separate chambers in a first direction in which the nozzles are arrayed. The ribs are disposed in the filter unit at intervals corresponding in size to at least two of the separate chambers in the first direction to partition the filter unit. The inlet portions are communicated in the first direction with each other in at least one portion of each of the inlet portions facing the filter unit.
Public/Granted literature
- US20100328409A1 LIQUID EJECTION HEAD, LIQUID-DROPLET EJECTION DEVICE, AND IMAGE FORMING APPARATUS Public/Granted day:2010-12-30
Information query
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