EP0279402A2 - Blattzuführvorrichtung - Google Patents

Blattzuführvorrichtung Download PDF

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Publication number
EP0279402A2
EP0279402A2 EP88102201A EP88102201A EP0279402A2 EP 0279402 A2 EP0279402 A2 EP 0279402A2 EP 88102201 A EP88102201 A EP 88102201A EP 88102201 A EP88102201 A EP 88102201A EP 0279402 A2 EP0279402 A2 EP 0279402A2
Authority
EP
European Patent Office
Prior art keywords
feeding
rotatable member
sheet
sheet material
transporting
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.)
Granted
Application number
EP88102201A
Other languages
English (en)
French (fr)
Other versions
EP0279402A3 (en
EP0279402B1 (de
Inventor
Ichiro Ohsawa
Yutaka Kikuchi
Masanobu Kanoto
Hideki Sato
Yoshifumi Endo
Hideshi Kawaguchi
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.)
Canon Inc
Original Assignee
Canon Inc
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
Priority claimed from JP62035139A external-priority patent/JP2603238B2/ja
Priority claimed from JP62035136A external-priority patent/JP2632829B2/ja
Application filed by Canon Inc filed Critical Canon Inc
Priority to EP93113438A priority Critical patent/EP0579264B1/de
Publication of EP0279402A2 publication Critical patent/EP0279402A2/de
Publication of EP0279402A3 publication Critical patent/EP0279402A3/en
Application granted granted Critical
Publication of EP0279402B1 publication Critical patent/EP0279402B1/de
Priority to HK98112870A priority patent/HK1011675A1/xx
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/52—Friction retainers acting on under or rear side of article being separated
    • B65H3/5207—Non-driven retainers, e.g. movable retainers being moved by the motion of the article
    • B65H3/5215—Non-driven retainers, e.g. movable retainers being moved by the motion of the article the retainers positioned under articles separated from the top of the pile
    • B65H3/5223—Retainers of the pad-type, e.g. friction pads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/02—Separating articles from piles using friction forces between articles and separator
    • B65H3/06—Rollers or like rotary separators
    • B65H3/0669—Driving devices therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2407/00—Means not provided for in groups B65H2220/00 – B65H2406/00 specially adapted for particular purposes
    • B65H2407/20—Means not provided for in groups B65H2220/00 – B65H2406/00 specially adapted for particular purposes for manual intervention of operator
    • B65H2407/21—Manual feeding

Definitions

  • the present invention relates to a sheet feeding apparatus usable with an image forming apparatus such as a copying machine and a printer.
  • a conventional sheet feeding apparatus includes a sheet tray 2, a sheet feeding spring 3 and a feeding roller 4, wherein a transfer material 1 on the sheet tray 2 is urged to the feeding roller 4 by the feeding spring 3.
  • the feeding roller 4 rotates, the leading edge of the transfer material (sheet) 1 is advanced into the space formed between a sheet guide 2 ⁇ and the feeding roller 4 by friction.
  • the coefficients of friction are so set that when plural transfer materials are advanced, the coefficient of friction ⁇ 1 between the transfer materials 1, the coefficient ⁇ 3 between the feeding roller 4 and the transfer material 1 and the coefficient ⁇ 2 between the transfer material 1 and a separation pad 6 which is urged to the feeding roller 4 by a separation spring 5, satisfy ⁇ 1 ⁇ ⁇ 2 ⁇ ⁇ 3.
  • the feeding roller 4 is provided with an unshown one-way clutch, so that the feeding roller 4 follows to rotate by the friction between the transfer material 1a and itself.
  • the rotation of the feeding roller 4 stops, and therefore, the next transfer material 1b is not fed. Since the pressure between the registration rollers 13 and 14 is large enough as compared with the frictional load between the transfer material 1a and the separa­tion pad 6, the conveying speed Vb of the transfer material 1a is stabilized.
  • a light beam 9 produced in the optical scanning means 8 is imaged on the photosensitive member 10 to form a latent image thereon, which is in turn developed with toner by a developing device.
  • the toner image on the photosensitive member 10 is transferred onto the transfer material 1a at point P.
  • the toner image transferred onto the transfer material 1a is fixed by a fixing device 12.
  • the conventional example employs a couple of registration rollers 13 and 14 in order to stabilize the speed of the transfer material at the point P where the image transfer is effected and to provide an accurate image.
  • the employment of the registration roller couple makes the apparatus bulky and expensive.
  • the conventional example relies on the relationship between the frictional forces wherein the frictional coefficient (and therefore force) ⁇ 3 between the feeding roller 4 and the transfer material 1 is larger than the frictional coefficient (and therefore force) ⁇ 2 between the separation pad and the transfer material when the transfer material or materials are between the feeding roller 4 and the separation pad 6 functioning as a separating means. For this reason, there always exists a slipping between the separation pad 6 and the transfer material 1 to be conveyed. This results in a braking force always applied to the feeding action of the feeding roller 4, and the braking force varies in accordance with materials, thickness and surface property of the transfer sheets and also with the number of sheets involved. Those are the reasons why the feeding speed Va of the feeding roller 4 is not stabilized.
  • the conventional example uses a couple of registration rollers 13 and 14 between the feeding roller 4 and the transfer drum 10 so as to stabilize the feeding speed Vb at a position where the stabilized speed is required, for example, the transfer station P where an image is transferred from the photosensitive drum 10 to the transfer material.
  • this makes the apparatus bulky and requires additional means, that is, a driving means for the registration roller couple, with the result that the cost of the apparatus is increased.
  • the feeding speed Va between the feeding roller 4 and the registration roller couple varies depending on the frictional coefficient of the transfer sheets or on the ambient conditions, even to such an extent that the sheet does not reach the registration roller couple in time.
  • a sheet feeding apparatus comprising: a feeding rotatable member for feeding a sheet material from a stack of sheet materials; separation means for cooperating with said feeding rotatable member to allow only one sheet material to be fed; and a transporting rotatable member for cooperat­ing with said feeding rotatable member to transport the sheet material separated by said separating means.
  • a reference numeral 1 designates transfer materials (sheets) which are stacked on a feeding tray 2 and which are to be fed from the tray 2.
  • the transfer materials 1 on the feeding tray 2 is urged to a feeding roller 4 by a feeding spring 3.
  • the feeding roller 4 rotates, the leading edge of the transfer material 1 advances to the sheet guide 2 ⁇ by friction.
  • the friction coeffi­cients are such that the friction coefficient ⁇ 1 between plural transfer materials fed out of the tray 2, the friction coefficient ⁇ 3 between the feeding roller 4 and the transfer material 1 and the friction coefficient ⁇ 2 between the transfer material 1 and the separation pad 6 urged to the feeding roller 4 by a separation spring 5 satisfy ⁇ 1 ⁇ ⁇ 2 ⁇ ⁇ 3.
  • a light beam 9 produced in the optical scanning means 8 is projected onto a photosensitive member 10 surface to form a latent image thereon, which is in turn developed with toner by a developing device 11.
  • the toner image on the photo­sensitive member 10 is transferred onto the transfer material 1a at point P shown in the Figure.
  • the feeding roller 4 is equipped with a one-way clutch bearing 4d so that after the driving force to the feeding roller 4 is stopped, the feeding roller 4 follows the transfer material 1a to rotate by friction therebetween.
  • FIG. 7A there is shown a longitudinal sectional view of a feeding roller of the apparatus shown in Figure 4.
  • the rotational force of the feeding roller 4 is transmitted to the roller 7 by pressing the roller 7 to the feeding roller 4 by a station spring 15.
  • the roller 7 is supported on a shaft which is in turn supported by bearings 16 which are supported in side plates 40.
  • a switch SW1 ( Figure 4) is preferable. More particularly, in response to or with a predetermined delay after the leading edge of the sheet actuating the switch SW1, the writing onto the photosensitive member 10 starts. The timing therebetween is determined by one skilled in the art depending on the distance between the switch SW1 or the point Q and the point P and the distance between a point S of the photosensitive member 10 and the point P.
  • the timing may be determined using a timer, rather than the switch SW1, which timer starts the timer period at the start of the sheet feeding.
  • Figure 12 is a longitudinal sectional view around a feeding roller of the feeding apparatus according to this embodiment.
  • This embodiment is similar to the embodiment of Figure 7A, but is additionally provided with gears 17 and 18.
  • the rotation of the feeding roller 4 is transmitted to the roller 7 through the gears 17 and 18.
  • the gear ratio is so determined that the peripheral speed of the feeding roller 4 and the roller 7 are substantially equal.
  • FIG. 13 there is shown a further embodiment.
  • This Figure shows a longitudinal sectional view around a feeding roller of the sheet feeding apparatus according to this embodiment.
  • This embodiment is similar to the embodiment described with Figure 7A but is provided with gears 17, 19, 18 and 20.
  • the rotation of the feeding roller 4 is transmitted from the gear 19 through the gear 17.
  • the rotation of the roller 7 is transmitted from the gear 20 through the gear 18.
  • a number of transfer materials (cut sheets) 201 are stacked on a feeding tray 202, and the leading edge portions of the cut sheets 201 are urged to feeding rollers 214, 214 ⁇ and idler rollers 215 and 215 ⁇ by a supporting plate 213 rotatably supported and spring biased by a compression spring 203.
  • the feeding rollers 214 and 214 ⁇ are provided with portions having smaller diameters, respectively, so that at least one portion of a circumference of each of the feeding rollers 214 and 214 ⁇ has a shape to provide an initializing position wherein it does not in contact with the cut sheet or the feeding roller 216 or 216 ⁇ .
  • the feeding rollers 214 and 214 ⁇ may have a length smaller than the minimum width of the sheet usable with this apparatus, and they are spaced apart longitudinally as shown in Figure 15B.
  • the feeding rollers 214 and 214 ⁇ are fixed on a driving shaft 217 which is controlled by a spring clutch 218 and a solenoid 219 adjacent a longitudinal end thereof which is effective to provide a one turn rotation control.
  • cam plates 220 and 220 ⁇ are mounted to the driving shaft 217 to swing the supporting plate 213.
  • the supporting plate 213 is provided with cam followers 221 and 221 ⁇ corresponding to the cam plates 220 and 220 ⁇ . Therefore, by the control of the rotation of the driving shaft 217, the supporting plate 213 moves substantially vertically so as to selectively urge the stacked cut sheets to the feeding rollers 214 and 214 ⁇ and the idler rollers 215 and 215 ⁇ . Because of this structure, when the operator loads the cut sheet into this apparatus, the supporting plate 213 takes a lower position as shown in Figure 14 and Figure 16A, thus allowing smooth loading of the cut sheets. Additionally, the operator is not required to perform an action of lowering the supporting plate 213.
  • idler rollers 215 and 215 ⁇ Adjacent outside longitudinal end of the feeding rollers 214 and 214 ⁇ , idler rollers 215 and 215 ⁇ are mounted to the driving shaft 217 for smooth rotation relative to the driving shaft 217.
  • the idler rollers 215 and 215 ⁇ have a diameter which is slightly smaller than that of the feeding rollers 214 and 214 ⁇ , for example, by 0.5 - 1 mm.
  • the conveying rollers 216 and 216 ⁇ are swingable about a drive input shaft 224 by a swinging arm 222, and is press-contacted to the idler rollers 215 and 215 ⁇ by a spring 223 stretched between a frame of the apparatus and the conveying roller assembly.
  • the driving force is applied to the conveying rollers 216 and 216 ⁇ through a driving gear 225 fixedly mounted to the drive input shaft 224 and conveying gear fixedly mounted to the conveying rollers 216 and 216 ⁇ .
  • the driving and conveying gears are preferably disposed between conveying rollers 216 and 216 ⁇ as in this embodiment, since then the application of the driving force does not result in an unbaranced pressing force of the conveying rollers, and therefore, the pressing force is stabilized.
  • a friction member is press-­contacted to separate the cut sheet 201.
  • the friction member is supported at its longitudinal center with a spring 226 for equalizing and pressing it to them.
  • the separation member is in this embodiment separation pads 227 and 227 ⁇ which is rubber material containing cork.
  • the separation pads may be separated into two pads 227 and 227 ⁇ , as shown in Figure 15B, if they exist corre­sponding to the feeding rollers 214 and 214 ⁇ and idler rollers 215 and 215 ⁇ .
  • the portion not provided with the separation pad functions as a sheet guide 228 to guide the cut sheet to the conveying rollers 216 and 216 ⁇ .
  • the sheet feeding apparatus is provided with an additional or second cut sheet inlet 229 which is effective to introduce a cut sheet into the nips formed between the conveying rollers 216 and 216 ⁇ and the idler rollers 215 and 215 ⁇ from other than the feeding tray 202. Therefore, it is possible that an optional feeding means such as a sheet deck capable of accommodating a great number of cut sheets is disposed below the apparatus so as to feed the sheet from the feeding means to the second cut sheet inlet, and therefore, the apparatus is ready for expansion.
  • the feeding roller 214 and the roller 215 are not necessarily coaxial, but may be parallel.
  • the roller 214 and the roller 215 may have the same diameter.
  • a sensor lever 230 Downstream of the nips formed between the conveying rollers 216 and 216 ⁇ and the idler rollers 215 and 215 ⁇ , a sensor lever 230 is disposed, which is supported on a swingable arm 222 to detect the leading edge of the cut sheet with the aid of a photointer­ruptor 231.
  • the sensor may otherwise be constructed by a transparent type or reflection type sensor other than the combination of the sensor lever 231 and the photo­interruptor 239.
  • the transfer roller 233 is of a semiconductor rubber to which a bias voltage of about 1 KV DC is applied, and is in contact with the photosensitive drum 301 to rotate therewith.
  • the guiding portion 232 may preferably be constructed using a casing for the developing device 302 disposed below the photosensitive drum 301, since then the accuracy relative to the photosensitive drum 301 can be easily achieved, also since the number of parts is decreased with easiness of construction and with lower cost.
  • an exposure station A for exposing the photosensitive drum 301 to a laser beam 402 from a laser scanning optical system 401 disposed at a left hand side of the apparatus as viewed in Figure 14, a developing station B provided with a developing sleeve 303 for developing a latent image formed on said photosensitive drum 301 by the image exposure at the exposure station A, a transfer station C provided with a transfer roller 233, a cleaning station D provided with a cleaner 304 for cleaning the photosensitive drum 301 after a developed image has been transferred from the photosensitive drum 301 to the transfer sheet, and a primary charging station E provided with charging means such as a corona charger 306 for uniformly charging the photosensitive drum 301 before the imagewise exposure.
  • a corona charger 306 for uniformly charging the photosensitive drum 301 before the imagewise exposure.
  • the cut sheet having received the toner image transferred thereonto at the transfer station C is introduced along a transportation guide which also functions as an inlet guide for an image fixing device.
  • the image fixing device is provided with a heating roller 235 containing therein a heater and a pressing roll 236 made of a heat-resistive elastic member such as silicone rubber, which form a nip, into which the sheet is inserted.
  • a heating roller 235 containing therein a heater and a pressing roll 236 made of a heat-resistive elastic member such as silicone rubber, which form a nip, into which the sheet is inserted.
  • the image is fixed on the sheet.
  • the sheet is discharged outside the image forming apparatus by a roller 237 disposed downstream of the fixing device and made of an elastic material such as rubber and NORSOREX (tradename, available from CDF CHIMIE, France) and having fins.
  • an unshown motor which is a driving source starts to rotate prior to the start of the sheet feeding operation.
  • the cutting sheet 201 is not fed since the frictional force between the cut sheet 201 and the separation pads 227 and 227 ⁇ is larger than the frictional force between the idler rollers 215 and 215 ⁇ and the cut sheet 201.
  • the supporting plate 213 takes a lower position by the cam plates 220 and 220 ⁇ and the cam followers 221 and 221 ⁇ so that the cut sheet does not contact the idler rollers 215 and 215 ⁇ .
  • a sheet feed driving gear 239 rotates which is connected through a spring clutch 218 to the driving shaft 217 for the feeding rollers 214 and 214 ⁇ .
  • the spring clutch 218 is provided with a one turn controlling 240, so that a one turn drive transmission is performed in response to of/off pulse of the solenoid 219.
  • the solenoid 219 is energized in response to a feed start signal, the pawl of the control ring 240 is moved away, with the result that the driving force is transmitted from the feed driving gear 239 to the driving shaft 217 through the spring clutch 218.
  • the driving shaft 217 starts to rotate, and the cam plate 220 rotates so that the supporting plate 213 is urged upwardly by the spring 3, as shown in Figure 16B.
  • the cut sheets stacked on the tray are urged to the feeding rollers 214 and 214 ⁇ and to the idler rollers 215 and 215 ⁇ . Even if the sheet is contacted to the rotating idler roller, the sheet is not fed out because the frictional force between the sheets is larger than the frictional force between the idler roller and the sheet.
  • the cut sheet reaches the detecting station H, where the leading edge of the sheet is detected, in response to which the image light starts onto the photosensitive member.
  • the cut sheet is continuously conveyed by the conveying rollers 216 and 216 ⁇ without interruption. Therefore, it can be avoided that a shock resulting from actuation or deactuation of the registration roller is imposed on an image.
  • the length L1 of the sheet passage from the leading edge detecting position H to the transfer station C is longer than the peripheral length L2 of the photosensitive drum 301 from the image exposure station A to the transfer station C (L2 ⁇ L1).
  • the roller 233 When the leading edge of the sheet reaches the roller 233, it is detected by a detecting sensor or by a timer starting from the output of the sensor 230. Then, the solenoid 219 is operated to stop the roller 214. However, the roller 216 continues to rotate, whereas the roller 215 rotates idly, and therefore, the roller 215 does not put any burden to the sheet feeding by the roller 214.
  • the sheet sensing position by the sensor lever 230 of the sheet leading edge sensor H is disposed adjacent an inside end of the minimum sheet width which is opposite to the reference position, a warning or prohibition can be performed when a user erroneously uses a sheet having a width smaller than the minimum usable width. As a result, it does not occur that the sheet having a width smaller than the minimum width reaches to the photosensitive drum. Also, the image writing on the photosensitive drum can be prevented, so that the damage and contamination to the drum can be minimized.
  • the sheet reference position is disposed at a lateral end, and on the basis of which the minimum width range and the maximum width range are determined.
  • the present invention is not limited to this, and applicable to a central reference position feeding system.
  • the feeding rollers 514 and 514 ⁇ , idler rollers 515 and 515 ⁇ and conveying rollers 516 and 516 ⁇ may not be divided but may be continuous rollers.
  • an idler roller 515 is disposed in the middle, whereas the feeding rollers 514 and 514 ⁇ are disposed adjacent opposite ends of the idler roller 515, and a separation pad 527 is integral and is opposed both to the feeding rollers 514 and 514 ⁇ .
  • the conveying roller 516 is an integral one roller.
  • the conveying roller 516 is not swingable to be pressed to the idler roller 515, but it is urged through bearings 542 and 542 ⁇ which are spring-biased by compression springs 541 and 541 ⁇ .
  • the conveying roller 516 receives a driving force from a driving gear 538.
  • the separation pad 527 may be urged through a swingable arm 543.
  • the structure is such that the conveying roller 516 is contacted only to the idler roller.
  • the sheet is prevented from being conveyed while being gripped between the feeding rollers 514 and 514 ⁇ and a conveying roller 516 which provide a strong conveying force, and therefore, production of paper dust can be prevented, and the conveying load can be decreased.
  • the rotation of the gear 538 is transmitted from the shaft 624 to the shaft 617, similarly to the described above.
  • Figure 17B is a modification of Figure 17A structure.
  • the feeding roller 614 is disposed in the middle, whereas the idler rollers 615 and 615 ⁇ are disposed adjacent the opposite ends of the feeding roller 614.
  • An integral separation pad 627 is contacted to both to the idler rollers 615 and 615 ⁇ .
  • the conveying rollers 616 and 616 ⁇ are disposed opposed to the idler rollers 615 and 615 ⁇ . In this structure, the driving force and the pressure are applied in the middle position.
  • a circular rubber member 714 is eccentrically fixed on the driving shaft 717. With this structure, the manufacturing is easy, and the contact between the cut sheet and the pad or the like is continuous and smooth.
  • a cam member 814 made of rubber material is employed which has a continuously increasing diameter. Also, with the structure, the contact between the cut sheet and the pad or the like is smooth.
  • the control of the feeding roller 914 is not one-rotation control, but is a half-­turn control.
  • Figures 19 and 20 show a yet further embodiments.
  • an auxiliary roller 700 is used in addition to the roller 4.
  • each two or three sheet materials are separated from the stack on the feeding tray 2, and subsequently one sheet is separated out by the cooperation between the roller 4 and the pad 6.
  • An inclined guide 2 ⁇ is coated with friction resistance member.
  • separation pawls 802 ⁇ is provided in the feeding tray 802, and by the cooperation between the roller 4 and the separation pawl 802 ⁇ , the sheet materials are separated one by one from the tray 802.
  • a belt is usable, and the stacked sheets may be separated from the bottom.
  • a sheet feeding apparatus includes a feeding roller for feeding a sheet material from a stack of sheet materials, a separation device for cooperating with the feeding roller to allow only one sheet material to be fed, a transportation roller for cooperating with the feeding roller to transport the sheet material separated by the separating device.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
EP88102201A 1987-02-17 1988-02-15 Blattzuführvorrichtung Expired - Lifetime EP0279402B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP93113438A EP0579264B1 (de) 1987-02-17 1988-02-15 Blattzuführvorrichtung
HK98112870A HK1011675A1 (en) 1987-02-17 1998-12-05 A sheet feeding apparatus

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP62035139A JP2603238B2 (ja) 1987-02-17 1987-02-17 給紙装置
JP35139/87 1987-02-17
JP62035136A JP2632829B2 (ja) 1987-02-17 1987-02-17 給紙装置
JP35136/87 1987-02-17

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP93113438A Division EP0579264B1 (de) 1987-02-17 1988-02-15 Blattzuführvorrichtung
EP93113438.1 Division-Into 1993-08-23

Publications (3)

Publication Number Publication Date
EP0279402A2 true EP0279402A2 (de) 1988-08-24
EP0279402A3 EP0279402A3 (en) 1989-12-20
EP0279402B1 EP0279402B1 (de) 1994-11-02

Family

ID=26374066

Family Applications (2)

Application Number Title Priority Date Filing Date
EP93113438A Expired - Lifetime EP0579264B1 (de) 1987-02-17 1988-02-15 Blattzuführvorrichtung
EP88102201A Expired - Lifetime EP0279402B1 (de) 1987-02-17 1988-02-15 Blattzuführvorrichtung

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP93113438A Expired - Lifetime EP0579264B1 (de) 1987-02-17 1988-02-15 Blattzuführvorrichtung

Country Status (2)

Country Link
EP (2) EP0579264B1 (de)
DE (2) DE3856271T2 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0386737A2 (de) * 1989-03-08 1990-09-12 Canon Kabushiki Kaisha Bogenzuführvorrichtung
EP0452961A2 (de) * 1990-04-20 1991-10-23 Canon Kabushiki Kaisha Blattzuführapparat
EP0464851A2 (de) * 1990-07-06 1992-01-08 Canon Kabushiki Kaisha Blattzuführer
EP0504833A1 (de) * 1991-03-19 1992-09-23 Canon Kabushiki Kaisha Blattzuführvorrichtung
GB2304696A (en) * 1995-08-10 1997-03-26 Samsung Electronics Co Ltd Automatic document feeders
EP0816107A3 (de) * 1996-06-25 1998-10-14 Seiko Epson Corporation Papiervorschubapparat und Drucker
EP1132215A2 (de) * 2000-02-24 2001-09-12 Seiko Epson Corporation Papierförderer, Hilfsrolle, Papierzuführverfahren unter Verwendung derselben, und Aufzeichnungsgerät derselben enthaltend

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Publication number Priority date Publication date Assignee Title
GB2029377A (en) * 1978-09-05 1980-03-19 Laurel Bank Machine Co Disbursing device in machine for counting paper sheets
EP0060596A1 (de) * 1981-03-13 1982-09-22 ELETTRONICA SAN GIORGIO- ELSAG S.p.A. Einrichtung zum Vereinzeln und auf gleichmässige Abstände bringen von flachen Gegenständen, insbesondere Briefpost und dgl.
JPS5863974A (ja) * 1981-10-12 1983-04-16 Hitachi Koki Co Ltd プリンタ露光開始制御装置
JPS5931225A (ja) * 1982-08-12 1984-02-20 Glory Ltd 紙葉繰出し装置
US4496145A (en) * 1981-03-14 1985-01-29 Minolta Camera Kabushiki Kaisha Sheet feeding apparatus
US4565361A (en) * 1983-04-11 1986-01-21 Fuji Giken Kabushiki Kaisha Bank note dispenser
US4638987A (en) * 1984-12-20 1987-01-27 Ricoh Company, Ltd. Automatic document feeder

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NL8102551A (nl) * 1981-05-25 1982-12-16 Oce Helioprint As Transportinrichting voor vellen.
US4627607A (en) * 1982-10-15 1986-12-09 Ricoh Company, Ltd. Sheet feeding system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2029377A (en) * 1978-09-05 1980-03-19 Laurel Bank Machine Co Disbursing device in machine for counting paper sheets
EP0060596A1 (de) * 1981-03-13 1982-09-22 ELETTRONICA SAN GIORGIO- ELSAG S.p.A. Einrichtung zum Vereinzeln und auf gleichmässige Abstände bringen von flachen Gegenständen, insbesondere Briefpost und dgl.
US4496145A (en) * 1981-03-14 1985-01-29 Minolta Camera Kabushiki Kaisha Sheet feeding apparatus
JPS5863974A (ja) * 1981-10-12 1983-04-16 Hitachi Koki Co Ltd プリンタ露光開始制御装置
JPS5931225A (ja) * 1982-08-12 1984-02-20 Glory Ltd 紙葉繰出し装置
US4565361A (en) * 1983-04-11 1986-01-21 Fuji Giken Kabushiki Kaisha Bank note dispenser
US4638987A (en) * 1984-12-20 1987-01-27 Ricoh Company, Ltd. Automatic document feeder

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Vol. 7, No. 152 (P-208)(1297), July 5, 1983; & JP-A-58 063 974 (HITACHI KOKI K.K.) 16-04-1983 *
PATENT ABSTRACTS OF JAPAN, Vol. 8, No. 128 (M-302)(1565), June 14, 1984; & JP-A-59 031 225 (GUROORII KOGYO K.K.) 20-02-1984 *
PATENT ABSTRACTS OF JAPAN, vol.7, no. 152 (P-208) (1297); July 5, 1983 & JP-A-5963974 *

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0386737A3 (de) * 1989-03-08 1991-01-09 Canon Kabushiki Kaisha Bogenzuführvorrichtung
EP0386737A2 (de) * 1989-03-08 1990-09-12 Canon Kabushiki Kaisha Bogenzuführvorrichtung
US5443251A (en) * 1989-03-08 1995-08-22 Canon Kabushiki Kaisha Sheet feeding apparatus
US5377970A (en) * 1990-04-20 1995-01-03 Canon Kabushiki Kaisha Sheet feeding apparatus with reduced vibration separator
EP0452961A2 (de) * 1990-04-20 1991-10-23 Canon Kabushiki Kaisha Blattzuführapparat
EP0452961A3 (en) * 1990-04-20 1992-12-09 Canon Kabushiki Kaisha Sheet feeding apparatus
EP0464851A2 (de) * 1990-07-06 1992-01-08 Canon Kabushiki Kaisha Blattzuführer
EP0464851A3 (en) * 1990-07-06 1992-03-04 Canon Kabushiki Kaisha Sheet feeding apparatus
US5273269A (en) * 1990-07-06 1993-12-28 Canon Kabushiki Kaisha Sheet feeding apparatus
EP0504833A1 (de) * 1991-03-19 1992-09-23 Canon Kabushiki Kaisha Blattzuführvorrichtung
US5253854A (en) * 1991-03-19 1993-10-19 Canon Kabushiki Kaisha Sheet feeding apparatus
GB2304696A (en) * 1995-08-10 1997-03-26 Samsung Electronics Co Ltd Automatic document feeders
GB2304696B (en) * 1995-08-10 1997-10-08 Samsung Electronics Co Ltd Automatic document feeders
EP0816107A3 (de) * 1996-06-25 1998-10-14 Seiko Epson Corporation Papiervorschubapparat und Drucker
US5934664A (en) * 1996-06-25 1999-08-10 Seiko Epson Corporation Paper feeding apparatus and printer
EP1132215A3 (de) * 2000-02-24 2001-11-28 Seiko Epson Corporation Papierförderer, Hilfsrolle, Papierzuführverfahren unter Verwendung derselben, und Aufzeichnungsgerät derselben enthaltend
EP1132215A2 (de) * 2000-02-24 2001-09-12 Seiko Epson Corporation Papierförderer, Hilfsrolle, Papierzuführverfahren unter Verwendung derselben, und Aufzeichnungsgerät derselben enthaltend
EP1264700A2 (de) * 2000-02-24 2002-12-11 Seiko Epson Corporation Papierförderer und Aufzeichnungsgerät derselben enthaltend
EP1264699A2 (de) * 2000-02-24 2002-12-11 Seiko Epson Corporation Papierförderer und Aufzeichnungsgerät derselben enthaltend
EP1264701A1 (de) * 2000-02-24 2002-12-11 Seiko Epson Corporation Papierförderer und Aufzeichnungsgerät derselben enthaltend
EP1264699A3 (de) * 2000-02-24 2003-01-15 Seiko Epson Corporation Papierförderer und Aufzeichnungsgerät derselben enthaltend
EP1264700A3 (de) * 2000-02-24 2003-01-15 Seiko Epson Corporation Papierförderer und Aufzeichnungsgerät derselben enthaltend
US6550759B2 (en) 2000-02-24 2003-04-22 Seiko Epson Corporation Paper feeder, auxiliary roller, paper feeding method using the same, and recording apparatus incorporating the same

Also Published As

Publication number Publication date
EP0579264B1 (de) 1998-11-25
DE3851963D1 (de) 1994-12-08
DE3856271D1 (de) 1999-01-07
EP0279402A3 (en) 1989-12-20
EP0579264A1 (de) 1994-01-19
DE3851963T2 (de) 1995-03-16
DE3856271T2 (de) 1999-06-02
EP0279402B1 (de) 1994-11-02

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