JPH0269345U

JPH0269345U -

Info

Publication number: JPH0269345U
Application number: JP14939788U
Authority: JP
Priority date: 1988-11-16
Filing date: 1988-11-16
Publication date: 1990-05-25

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例としての液晶シヤツ
タ式プリンタの主要構成を示した模式図、第２図
及び第３図は夫々上記プリンタにおける現像電位
差に対する画像反射濃度と現像トナー量の各関係
を示す各グラフ図、第５図及び第６図は夫々上記
プリンタにおける転写前トナー量と転写後トナー
量及び現像剤電気抵抗値と飽和濃度電位差の各関
係を示す各グラフ図、第７図は従来のリサイクル
式画像形成装置を示す模式図である。１，７１…感光体ドラム、４，７４…クリーナ
兼用現像器、５…可変バイアス電源、６…バイア
ス電圧制御回路、７…抵抗値検出回路、８…抵抗
値検出センサ、１２，７５…転写器、１４…導電
性ブラシ、１５…バイアス電源（導電性ブラシ用
）、ｐ…転写材、ｔ…トナー像、ｔ′…未転写ト
ナー。 FIG. 1 is a schematic diagram showing the main structure of a liquid crystal shutter type printer as an embodiment of the present invention, and FIGS. 2 and 3 are the relationships between the image reflection density and the amount of developed toner with respect to the developing potential difference in the printer described above, respectively. 5 and 6 are graphs showing the relationships between the amount of toner before transfer, the amount of toner after transfer, the developer electrical resistance value, and the saturation density potential difference in the above printer, and FIG. FIG. 1 is a schematic diagram showing a conventional recycling type image forming apparatus. 1, 71... Photosensitive drum, 4, 74... Cleaner/developing device, 5... Variable bias power supply, 6... Bias voltage control circuit, 7... Resistance value detection circuit, 8... Resistance value detection sensor, 12, 75... Transfer device , 14... Conductive brush, 15... Bias power supply (for conductive brush), p... Transfer material, t... Toner image, t'... Untransferred toner.

補正平１．２．２図面の簡単な説明を次のように補正する。明細書の第１９頁第１３行目乃至第１６行目の
「第５図及び第６図は………各グラフ図、」を下
記の様に補正する。「４図及び第５図は夫々上記プリンタにおける
転写前トナー量と転写後トナー量及び現像剤電気
抵抗値と飽和濃度電位差の各関係を示す各グラフ
図、第６図は現像剤抵抗値検出回路を示す模式図
、」Amendment 1.2.2 The brief description of the drawing is amended as follows. The statement "Figures 5 and 6 are each graph diagram" on page 19, line 13 to line 16 of the specification is corrected as follows. "Figures 4 and 5 are graphs showing the relationship between the amount of toner before transfer, the amount of toner after transfer, the developer electric resistance value, and the saturation density potential difference, respectively, in the above printer, and Figure 6 is the developer resistance value detection circuit. Schematic diagram showing

Claims

[Scope of utility model registration request]

an image carrier provided rotatably; a charging means for uniformly charging a surface of the image carrier; and an electrostatic latent image forming device for forming an electrostatic latent image on the uniformly charged surface according to image information. and a cleaning/developing device in which a developing bias voltage of a predetermined polarity is applied, a developer containing hydrophobic silica particles is applied to the electrostatic latent image by electric field force, the image is visualized, and the developer being conveyed is recovered. means, a bias voltage variable means for changing the developing bias voltage to adjust the amount of developer applied to the electrostatic latent image, a transfer means for transferring the developed image onto a transfer material, and a developer after passing through the transfer means; In an image forming apparatus that obtains an image by repeatedly performing the image forming process, the image forming apparatus includes a developer disturbing means that captures the developer remaining on the image carrier and disperses and releases the developer. resistance value detection means for detecting an electrical resistance value;
development bias voltage control for controlling the development bias voltage according to the value detected by the resistance value detection means, and limiting the amount of developer applied to the electrostatic latent image to the amount necessary for the image density to reach an upper limit; An image forming apparatus comprising: means.