JPS5450319A - Pressure plate device for copying appatatus - Google Patents
Pressure plate device for copying appatatusInfo
- Publication number
- JPS5450319A JPS5450319A JP11708977A JP11708977A JPS5450319A JP S5450319 A JPS5450319 A JP S5450319A JP 11708977 A JP11708977 A JP 11708977A JP 11708977 A JP11708977 A JP 11708977A JP S5450319 A JPS5450319 A JP S5450319A
- Authority
- JP
- Japan
- Prior art keywords
- pressure plate
- cam
- spring
- recess
- leading end
- 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
Landscapes
- Holders For Sensitive Materials And Originals (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Abstract
PURPOSE: To make it possible to stop a pressure plate at a smaller angle than 90 degree by bringing the leading end of a slide pin, which is mounted slidably on the pressure plate, into engagement with a cam member by the action of a spring.
CONSTITUTION: A cam 3 formed with a projection 3a and a recess 3b is fixed to the end of a support shaft 2 which in turn is fixed to the body 1 of a copying apparatus. A pivot pin 9 of a pressure plate 7 is inserted rotatably into the cam 3 and the support shaft 2. A silde pin 5 is inserted slidably into a bearing 12 which is supported on a support member 11 held in contact with a hinge member 6. The slide pin 5 is biased through a link member 15 by a spring 4 so that its leading end having a complementary shape with the recess 3b of the cam 3 is forced into contact with the cam. When the pressure plate 7 is turned and opened at a higher angle than a preset value, the slide pin 5 is made to protrude by the biasing action of the spring until its leading end passes over the projection 3a of the cam and engages with the recess 3b. If the tension of the spring 4 is so adjusted that the pressure plate is prevented from falling down by its own weight, the pressure plate can be stopped at that position
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11708977A JPS5450319A (en) | 1977-09-29 | 1977-09-29 | Pressure plate device for copying appatatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11708977A JPS5450319A (en) | 1977-09-29 | 1977-09-29 | Pressure plate device for copying appatatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5450319A true JPS5450319A (en) | 1979-04-20 |
Family
ID=14703112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11708977A Pending JPS5450319A (en) | 1977-09-29 | 1977-09-29 | Pressure plate device for copying appatatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5450319A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5938734A (en) * | 1982-08-30 | 1984-03-02 | Kato Denki Kk | Opening and closing device of original pressing plate |
| EP1220045A2 (en) * | 2000-12-28 | 2002-07-03 | Canon Kabushiki Kaisha | Automatic original feeding apparatus and image forming apparatus provided with the same |
-
1977
- 1977-09-29 JP JP11708977A patent/JPS5450319A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5938734A (en) * | 1982-08-30 | 1984-03-02 | Kato Denki Kk | Opening and closing device of original pressing plate |
| JPH0374371B2 (en) * | 1982-08-30 | 1991-11-26 | ||
| EP1220045A2 (en) * | 2000-12-28 | 2002-07-03 | Canon Kabushiki Kaisha | Automatic original feeding apparatus and image forming apparatus provided with the same |
| US6615019B2 (en) | 2000-12-28 | 2003-09-02 | Canon Kabushiki Kaisha | Automatic original feeding apparatus and image forming apparatus provided with the same |
| EP1220045A3 (en) * | 2000-12-28 | 2006-03-29 | Canon Kabushiki Kaisha | Automatic original feeding apparatus and image forming apparatus provided with the same |
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