JPS5637937A - Paper feeder for photocopier or the like - Google Patents

Paper feeder for photocopier or the like

Info

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
Application number
JP11026079A
Other languages
Japanese (ja)
Inventor
Yasuaki Ishii
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP11026079A priority Critical patent/JPS5637937A/en
Publication of JPS5637937A publication Critical patent/JPS5637937A/en
Pending legal-status Critical Current

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
JP11026079A 1979-08-31 1979-08-31 Paper feeder for photocopier or the like Pending JPS5637937A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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