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Title:
IMAGE FORMING DEVICE AND HEAD
Document Type and Number:
WIPO Patent Application WO/2000/029220
Kind Code:
A1
Abstract:
An image forming device which is used for a printer for a computer or the like, and which is provided with an image forming head (7) between a developing sleeve (2) and a counter electrode (6) and with a control electrode (19) formed around the opening (16) of the head (7) to thereby open/close the opening (16) electrostatically by controlling voltage applied to the control electrode (19). In order to prevent the clogging of the opening (16) in the head (7) by toner (5), a ratio (percentage) of an area of the opening (16) to a sum of an area spreading around the opening (16) in the control electrode (19) and an area of the opening (16) is set to at least 8%.

More Like This:
JP3159940PRINT HEAD STRUCTURE HAVING SPECIAL SHIELD ELECTRODE
JPH05210337PRINTING SYSTEM
JPH09141920ELECTRODE BODY FOR IMAGE FORMING APPARATUS
Inventors:
KUMON AKIRA (JP)
FUKANO AKIRA (JP)
KITAOKA YOSHITAKA (JP)
RYOJI AKIRA (JP)
Application Number:
PCT/JP1999/006239
Publication Date:
May 25, 2000
Filing Date:
November 10, 1999
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
ARRAY PRINTERS AB (SE)
KUMON AKIRA (JP)
FUKANO AKIRA (JP)
KITAOKA YOSHITAKA (JP)
RYOJI AKIRA (JP)
International Classes:
B41J2/415; G03G15/34; (IPC1-7): B41J2/385
Foreign References:
EP0710898A11996-05-08
EP0754557A11997-01-22
EP0860753A21998-08-26
JPH10235923A1998-09-08
JPH08324017A1996-12-10
JPH1191153A1999-04-06
Attorney, Agent or Firm:
Maeda, Hiroshi (Utsubohonmachi 1-chome Nishi-ku Osaka-shi Osaka, JP)
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