JPS5637937A - Paper feeder for photocopier or the like - Google Patents
Paper feeder for photocopier or the likeInfo
- Publication number
- JPS5637937A JPS5637937A JP11026079A JP11026079A JPS5637937A JP S5637937 A JPS5637937 A JP S5637937A JP 11026079 A JP11026079 A JP 11026079A JP 11026079 A JP11026079 A JP 11026079A JP S5637937 A JPS5637937 A JP S5637937A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- paper feed
- paper
- constant
- bottom plate
- 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
Abstract
PURPOSE: To keep the thrusting force of a paper feed roller at a constant level independently of paper feed conditions and the progress in paper feed, by setting the weight and gravity center of a movable auxiliary bottom plate provided in a cassette and the stiffness constant of a spring for swinging a bottom plate push-up arm, so that the weight, gravity position and stiffness constant meet prescribed conditions.
CONSTITUTION: The torque T and stiffness constant (a) of a spring 11 are determined in accordance with formulae 1, 4 to optimize the thrusting force of a paper feed roller 3 for copying papers of one kind in size, thickness and weight. The weight P3 of an auxiliary bottom plate 7, the position l5 of a pin 7a, the gravity center l3 of the plate 7, the gravity center l2 of a copying paper stack 5, etc. are adjusted in combination so that the thrusting force P1 of the paper feed roller 3 remains constant even if the weight of the copying paper stack 5 alters due to the change in the size and weight of each copy paper. The constant (b) of the formula 4 is determined by the unit weight and gravity center of the copying paper and the fulcrum of the auxiliary bottom plate 7. The thrusting force of the paper feed roller is thus kept constant despite the change in the properties of the copying paper and the fluctuation due to the progress in paper feed.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11026079A JPS5637937A (en) | 1979-08-31 | 1979-08-31 | Paper feeder for photocopier or the like |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11026079A JPS5637937A (en) | 1979-08-31 | 1979-08-31 | Paper feeder for photocopier or the like |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5637937A true JPS5637937A (en) | 1981-04-11 |
Family
ID=14531175
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11026079A Pending JPS5637937A (en) | 1979-08-31 | 1979-08-31 | Paper feeder for photocopier or the like |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5637937A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4623137A (en) * | 1982-09-28 | 1986-11-18 | Mita Industrial Co., Ltd. | Paper feeder equipped with copying paper cassettes |
JPS62153228U (en) * | 1986-03-20 | 1987-09-29 | ||
US5005820A (en) * | 1989-06-23 | 1991-04-09 | International Business Machines Corporation | Paper tray with leaf spring |
US5106073A (en) * | 1981-08-21 | 1992-04-21 | Hitachi, Ltd. | Sheet feeding device |
US6182940B1 (en) | 1996-11-18 | 2001-02-06 | Central Glass Co., Ltd. | Spacer for stacking glass plates, method for attaching the spacer to the glass plate and apparatus for attaching the spacer to the glass plate |
US6217019B1 (en) * | 1998-10-23 | 2001-04-17 | Fuji Photo Film Co. Ltd. | Recording sheet package |
JP2007176670A (en) * | 2005-12-28 | 2007-07-12 | Seiko Epson Corp | Stabilizer of feeding plunge angle of material to be recorded, recorder and liquid injector |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5010002U (en) * | 1973-05-23 | 1975-02-01 | ||
JPS5417230A (en) * | 1977-06-11 | 1979-02-08 | Bendiberica Sa | Control valve |
JPS5515531A (en) * | 1978-07-17 | 1980-02-02 | Matsushita Electric Ind Co Ltd | Malfunction prevention circuit of microcomputer |
JPS55151440A (en) * | 1979-05-11 | 1980-11-26 | Fujitsu Ltd | Automatic paper-feeding device |
JPS55161735A (en) * | 1979-06-05 | 1980-12-16 | Canon Inc | Paper sheet feeder |
-
1979
- 1979-08-31 JP JP11026079A patent/JPS5637937A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5010002U (en) * | 1973-05-23 | 1975-02-01 | ||
JPS5417230A (en) * | 1977-06-11 | 1979-02-08 | Bendiberica Sa | Control valve |
JPS5515531A (en) * | 1978-07-17 | 1980-02-02 | Matsushita Electric Ind Co Ltd | Malfunction prevention circuit of microcomputer |
JPS55151440A (en) * | 1979-05-11 | 1980-11-26 | Fujitsu Ltd | Automatic paper-feeding device |
JPS55161735A (en) * | 1979-06-05 | 1980-12-16 | Canon Inc | Paper sheet feeder |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5106073A (en) * | 1981-08-21 | 1992-04-21 | Hitachi, Ltd. | Sheet feeding device |
US4623137A (en) * | 1982-09-28 | 1986-11-18 | Mita Industrial Co., Ltd. | Paper feeder equipped with copying paper cassettes |
JPS62153228U (en) * | 1986-03-20 | 1987-09-29 | ||
US5005820A (en) * | 1989-06-23 | 1991-04-09 | International Business Machines Corporation | Paper tray with leaf spring |
US6182940B1 (en) | 1996-11-18 | 2001-02-06 | Central Glass Co., Ltd. | Spacer for stacking glass plates, method for attaching the spacer to the glass plate and apparatus for attaching the spacer to the glass plate |
US6217019B1 (en) * | 1998-10-23 | 2001-04-17 | Fuji Photo Film Co. Ltd. | Recording sheet package |
JP2007176670A (en) * | 2005-12-28 | 2007-07-12 | Seiko Epson Corp | Stabilizer of feeding plunge angle of material to be recorded, recorder and liquid injector |
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