Invention Grant
US08135313B2 Powder transport screw, and development device, process unit and image-forming apparatus comprising this powder transport screw
有权
粉末输送螺杆，显影装置，处理单元和包含该粉末输送螺杆的图像形成装置
- Patent Title: Powder transport screw, and development device, process unit and image-forming apparatus comprising this powder transport screw
- Patent Title (中): 粉末输送螺杆，显影装置，处理单元和包含该粉末输送螺杆的图像形成装置
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Application No.: US12338366Application Date: 2008-12-18
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Publication No.: US08135313B2Publication Date: 2012-03-13
- Inventor: Tomofumi Yoshida , Hirobumi Ooyoshi , Kenzo Tatsumi , Tomohiro Kubota , Yoshiyuki Shimizu , Yoshihiro Kawakami , Osamu Saito , Manabu Hamada
- Applicant: Tomofumi Yoshida , Hirobumi Ooyoshi , Kenzo Tatsumi , Tomohiro Kubota , Yoshiyuki Shimizu , Yoshihiro Kawakami , Osamu Saito , Manabu Hamada
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2007-339835 20071228
- Main IPC: G03G15/08
- IPC: G03G15/08
Abstract:
A toner transport screw that is capable of maintaining a smooth and stable transport function. The toner transport screw, in which a helical blade is disposed on the circumference of a rotating shaft, has at least one spiral direction reversal part formed by connecting the respective ends of a first blade part and a second blade part, the directions of spiral of the first blade part and the second blade part being in opposite directions. A passage, which allows the toner to pass through the blades in the circumferential direction of the rotating shaft, is formed in the spiral direction reversal part.
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