JPH0221665U - - Google Patents
Info
- Publication number
- JPH0221665U JPH0221665U JP9929988U JP9929988U JPH0221665U JP H0221665 U JPH0221665 U JP H0221665U JP 9929988 U JP9929988 U JP 9929988U JP 9929988 U JP9929988 U JP 9929988U JP H0221665 U JPH0221665 U JP H0221665U
- Authority
- JP
- Japan
- Prior art keywords
- heater
- area
- temperature
- roller
- heats
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 6
Landscapes
- Fixing For Electrophotography (AREA)
- Control Of Resistance Heating (AREA)
- Control Of Temperature (AREA)
Description
第１図ａ，ｂは本考案に係るトナー像熱定着装
置の一実施例の温度制御系を示す構成図及びその
等価回路図、第２図は従来の熱定着装置の概略を
示す斜視図、第３図ａ，ｂは第２図の熱定着装置
の温度制御系を示す構成図及びその等価回路図、
第４図ａ，ｂは従来の他の熱定着装置の温度制御
系を示す構成図及びその等価回路図である。
２１……ヒートローラ（ローラ）、２２ａ……
第一ヒータ、２２ｂ……第二ヒータ、２５……温
度センサ（温度検知手段）、２６……温度スイツ
チ、２７……温度制御回路（制御回路）、Ａ……
領域（第一の領域）、Ｂ……領域（第二の領域）
。
1A and 1B are block diagrams showing a temperature control system of an embodiment of a toner image thermal fixing device according to the present invention and its equivalent circuit diagram; FIG. 2 is a perspective view schematically showing a conventional thermal fixing device; 3a and 3b are block diagrams showing the temperature control system of the heat fixing device of FIG. 2 and their equivalent circuit diagrams,
FIGS. 4a and 4b are a block diagram and an equivalent circuit diagram showing a temperature control system of another conventional heat fixing device. 21... Heat roller (roller), 22a...
First heater, 22b... Second heater, 25... Temperature sensor (temperature detection means), 26... Temperature switch, 27... Temperature control circuit (control circuit), A...
Area (first area), B...area (second area)
.
Claims (1)
転し、像記録媒体にトナー像を定着させるローラ
と、 上記ローラの軸方向の全長より短い第一の領域
を加熱する第一ヒータと、 上記ローラの軸方向の上記第一の領域以外の第
二の領域を加熱する第二ヒータと、 上記ローラの第一の領域に備えられ、この領域
の表面温度を検知する温度検知手段と、 上記温度検知手段の検知温度に基づいて上記第
一ヒータと第二ヒータとをオン・オフ制御する制
御回路と、 上記ローラの第二の領域に備えられ、この領域
の温度が所定温度以上になつた時に上記第二ヒー
タをオフにする温度スイツチとを有することを特
徴とするトナー像熱定着装置。[Claims for Utility Model Registration] A roller that rotates in contact with an image recording medium carrying a toner image to fix the toner image on the image recording medium, and a first area that is shorter than the total length of the roller in the axial direction. a first heater that heats; a second heater that heats a second area other than the first area in the axial direction of the roller; and a second heater that is provided in the first area of the roller and detects the surface temperature of this area. a control circuit that controls on/off the first heater and the second heater based on the temperature detected by the temperature detection means; a temperature switch that turns off the second heater when the temperature reaches a predetermined temperature or higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9929988U JPH0221665U (en) | 1988-07-26 | 1988-07-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9929988U JPH0221665U (en) | 1988-07-26 | 1988-07-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0221665U true JPH0221665U (en) | 1990-02-14 |
Family
ID=31326332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9929988U Pending JPH0221665U (en) | 1988-07-26 | 1988-07-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0221665U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05135848A (en) * | 1991-11-13 | 1993-06-01 | Canon Inc | Heating device |
-
1988
- 1988-07-26 JP JP9929988U patent/JPH0221665U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05135848A (en) * | 1991-11-13 | 1993-06-01 | Canon Inc | Heating device |
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