EP0279402B1 - Blattzuführvorrichtung - Google Patents

Blattzuführvorrichtung Download PDF

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Publication number
EP0279402B1
EP0279402B1 EP88102201A EP88102201A EP0279402B1 EP 0279402 B1 EP0279402 B1 EP 0279402B1 EP 88102201 A EP88102201 A EP 88102201A EP 88102201 A EP88102201 A EP 88102201A EP 0279402 B1 EP0279402 B1 EP 0279402B1
Authority
EP
European Patent Office
Prior art keywords
feeding
rotatable member
sheet
rollers
roller
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.)
Expired - Lifetime
Application number
EP88102201A
Other languages
English (en)
French (fr)
Other versions
EP0279402A3 (en
EP0279402A2 (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 set such that, when a plurality of transfer materials is 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 towards 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 to 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 an optical scanning means 8 is imaged on a photosensitive member 10 to form a latent image thereon, which, in turn, is developed with toner by a developing device.
  • the toner image on the photosensitive member 10 is transferred onto the transfer material 1a at a 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 13, 14 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 force) ⁇ 2 between the separation pad 6 and the transfer material 1 when the transfer material or materials 1 are located 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 the material, thickness and surface properties of the transfer sheets and also with the number of sheets involved. These are the reasons why the feeding speed Va of the feeding roller 4 is not stabilized.
  • the conventional example uses the 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 the image is transferred from the photosensitive drum 10 to the transfer material 1.
  • this makes the apparatus bulky and requires additional means, that is, a driving means for the registration roller couple 13, 14, with the result that the costs of the apparatus are increased.
  • the feeding speed Va between the feeding roller 4 and the registration roller couple 13, 14 varies depending on the frictional coefficient of the transfer sheets 1 or on the ambient conditions, even to such an extent that the sheet 1 does not reach the registration roller couple 13, 14 in time.
  • the sheet feeding apparatus comprises a feeding roller having a feeding portion for contacting and applying a feeding force to a sheet material of a stack of sheet materials, and a non-feeding portion having the same diameter as the feeding portion, and not applying a feeding force to the sheet material.
  • a separating means cooperates with the feeding roller so as to allow only one sheet to be fed, and additional rollers are disposed co-axially with the feeding roller, wherein conveying rollers cooperate with the additional rollers in order to transport the sheet material separated by the separating means.
  • this sheet feeding apparatus is less bulky as compared to the aforementioned prior art, it suffers from the fact that, during the feeding action of the feeding roller, the load for rotation of the feeding roller is large due to the frictional contact with the separating means even when the feeding apparatus does not apply the feeding force to the sheet. This promotes the wearing of the separating means, which, in turn, may cause an unstable feeding speed.
  • the object of the invention is to provide a sheet feeding apparatus, the functionality of which is increased as compared to that of the known feeding apparatus, and, in particular, by which the feeding of the sheet material can be performed stably and reliably.
  • a second rotatable member which is disposed co-axially with a first rotatable member having a feeding portion and a non-feeding portion, has a diameter smaller than that of the feeding portion and larger than that of the non-feeding portion so that the latter is prevented from contacting a separating means. Accordingly, the load of the first rotatable member is small when the sheet feeding mechanism does not apply the feeding force to the sheet.
  • the second rotatable member contacts the separating means as well as a third rotatable member which cooperates with the second rotatable member so as to transport the sheet material separated by the separating means.
  • the sheet material can be transported by the second and third rotatable members irrespective of the rotation of the first rotatable member, wherein the first rotatable member does not obstruct the sheet transportation and the next sheet material is prevented from being double-fed. As a result, the sheet feeding operation is stabilized.
  • Figure 1 is a sectional view of a conventional sheet feeding apparatus.
  • Figure 2 is an enlarged sectional view around a feeding roller of the conventional sheet feeding apparatus.
  • Figure 3 is an enlarged sectional view around the feeding roller of Fig. 2, wherein a sheet is fed.
  • Figure 4 is a sectional view of an image forming apparatus incorporating a sheet feeding apparatus according to an embodiment of the present invention.
  • Figure 5A illustrates a driving system for the sheet feeding apparatus of Figure 4.
  • Figure 5B is a sectional view taken along B-B of Figure 5A.
  • Figure 5C is a sectional view taken along C-C of Figure 5A.
  • Figures 6A,B are sectional views taken along D-D of Figure 5A.
  • Figure 7A shows a driving system for a sheet feeding apparatus according to a further embodiment of the present invention.
  • Figure 7B shows a driving system for a sheet feeding apparatus according to a further embodiment of the present invention.
  • Figure 8A is a cross-sectional view of a feeding roller of a sheet feeding apparatus according to a further embodiment of the present invention.
  • Figure 8B is a cross-sectional view of a feeding roller of a sheet feeding apparatus according to a further embodiment of the present invention.
  • Figure 8C is a cross-sectional view of a feeding roller of a sheet feeding apparatus according to a further embodiment of the present invention.
  • a plurality 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 towards feeding rollers 214, 214' and idler rollers 215 and 215' by a supporting plate 213 rotatably supported and 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 circumferential portion of each of the feeding rollers 214 and 214' has a shape to provide an initial position in which it does not contact the cut sheet 201 or conveying rollers 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 in a longitudinal direction as shown in Figure 5B.
  • 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 so as 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 201 towards the feeding rollers 214 and 214' and the idler rollers 215 and 215'. Because of this structure, when the operator loads the cut sheets 201 into this apparatus, the supporting plate 213 takes a lower position as shown in Figure 4 and Figure 6A, thus allowing smooth loading of the cut sheets 201.
  • the operator is not required to perform an action of lowering the supporting plate 213.
  • the idler rollers 215 and 215' Adjacent outside longitudinal end of the feeding rollers 214 and 214', the 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 are 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 224' fixedly mounted to the drive input shaft 224 and a conveying gear 225 fixedly mounted to the conveying rollers 216 and 216'.
  • the driving and conveying gears 224', 225 are preferably disposed between the conveying rollers 216 and 216' as in this embodiment, since, then, the application of the driving force does not result in an unbalanced pressing force of the conveying rollers 216, 216', and, therefore, the pressing force is stabilized.
  • a friction member is press-contacted to separate the cut sheets 201.
  • the friction member is supported at its longitudinal center with a spring 226 for equalizing and pressing it.
  • the separation member according to this embodiment consists of separation pads 227 and 227' which are formed from rubber material containing cork. The separation pads may be separated into two pads 227 and 227', as shown in Figure 5B, corresponding to the feeding rollers 214 and 214' and the idler rollers 215 and 215'. In this case, the portion not provided with the separation pad functions as a sheet guide 228 for guiding the cut sheets 201 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 may be disposed below the apparatus so as to feed the sheets from the feeding means to the second cut sheet inlet, and, therefore, the apparatus is ready for expansion.
  • an optional feeding means such as a sheet deck capable of accommodating a great number of cut sheets may be disposed below the apparatus so as to feed the sheets from the feeding means to the second cut sheet inlet, and, therefore, the apparatus is ready for expansion.
  • 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 the swingable arm 222 to detect the leading edge of the cut sheets 201 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 230 and the photointerruptor 231.
  • the cut sheet 201 After the cut sheet 201 has actuated the sensor lever 230 by its leading edge, it is guided by a guiding portion 232 having a radius of curvature which is slightly larger than that of the feeding rollers 214 and 214', and is introduced into a nip formed between a photosensitive drum 301 and a transfer roller 233.
  • the transfer roller 233 is of a semiconductor rubber to which a bias voltage of about 1 KV DC is applied, and contacts the photosensitive drum 301 to rotate therewith.
  • the guiding portion 232 may preferably be constructed using a casing for a developing device 302 disposed below the photosensitive drum 301, since then the accuracy relative to the photosensitive drum 301 can easily be achieved, and since the number of parts is decreased.
  • an exposure station A for exposing the photosensitive drum 301 to a laser beam 402 emitted from a laser scanning optical system 401 disposed at a left hand side of the apparatus in Figure 4, 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 the transfer roller 233, a cleaning station D provided with a means 304 for cleaning the photosensitive drum 301 after a developed image has been transferred from the photosensitive drum 301 to the transfer sheet 201, and a primary charging station E provided with charging means such as a corona charger 306 for uniformly charging the photosensitive drum 301 before exposure.
  • a corona charger 306 for uniformly charging the photosensitive drum 301 before exposure.
  • the cut sheet 201 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 roller 236 made of a heat-resistive elastic member such as silicone rubber, which form a nip into which the sheet 201 is inserted. When the sheet 201 passes through the nip, the image is fixed on the sheet 201.
  • the sheet 201 is discharged to the outside of the image forming apparatus by a roller 237 disposed downstream of the fixing device, made of an elastic material such as rubber and NORSOREX (tradename, available from CDF CHIMIE, France) and having fins.
  • a roller 237 disposed downstream of the fixing device, 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 201 does not contact the idler rollers 215 and 215'.
  • a sheet feed driving gear 239 rotates which is connected via the 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 means (control ring) 240, so that a one turn drive transmission is performed in response to the on/off pulse of the solenoid 219.
  • the cut sheet 201 reaches the rotating conveying rollers 216 and 216', and thereafter, the conveying speed of the cut sheet 201 is stabilized by the conveying rollers 216 and 216'. Then, the cut sheet 201 reaches a detecting station H at which the leading edge of the sheet 201 is detected, in response to which the image light is emited onto the photosensitive members 301. By doing so, the cut sheet 201 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 leading edge of the sheet 201 reaches the roller 233, it is detected by a detecting sensor or by a timer starting with the output of the sensor 230.
  • the solenoid 219 is operated to stop the roller 214.
  • the roller 216 continues to rotate, whereas the roller 215 rotates idly, and therefore, the roller 215 does not interfere with the sheet feeding by the roller 214.
  • the sheet sensing position by the sensor lever 230 of the sheet leading edge sensor H is located 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.
  • a sheet having a width smaller than the minimum width cannot reach the photosensitive drum 301.
  • the image writing on the photosensitive drum 301 can be prevented, so that damage and contamination to the drum 301 can be minimized.
  • the sheet reference position is disposed at a lateral end, and on the basis thereof 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 an integral separation pad 527 is opposed to the feeding rollers 514 and 514'.
  • the conveying roller 516 is an integral single roller.
  • the conveying roller 516 is not swingable to be pressed against the idler roller 515, but it is urged via 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 via a swingable arm 543.
  • the structure is such that the conveying roller 516 contacts only the idler roller 515.
  • the sheet is prevented from being conveyed while being gripped between the feeding rollers 514 and 514' and the conveying roller 516 which provide a strong conveying force, and, therefore, the 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 524 to the shaft 617.
  • Figure 7B is a modification of the structure shown in Figure 7A.
  • 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 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 a 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 this structure, the contact between the cut sheet and the pad or the like is smooth.
  • the control of the feeding roller 914 is not an one-rotation control, but it is a half-turn control.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)

Claims (7)

  1. Blattzuführvorrichtung, die aufweist:
       ein erstes drehbares Element (214, 214'; 514, 514'; 614; 714; 814; 914), das einen Zuführabschnitt zum Berühren eines Blattmaterials (201) eines Stapels von Blattmaterialien und Aufbringen einer Zuführkraft auf dieses und einen Nichtzuführabschnitt zum Nichtaufbringen der Zuführkraft auf dieses hat,
       ein zweites frei drehbares Element (215, 215'; 515; 615, 615'), das zum ersten drehbaren Element koaxial angeordnet ist,
       eine Trenneinrichtung (227, 227'; 527; 627) zum Zusammenwirken mit dem ersten drehbaren Element, um das Zuführen eines Blattmaterials zu gestatten, und
       ein drittes drehbares Element (216, 216'; 516; 616, 616') zum Zusammenwirken mit dem zweiten drehbaren Element, um das Blattmaterial zu transportieren, das durch die Trenneinrichtung getrennt wurde,
       dadurch gekennzeichnet, daß
       das zweite drehbare Element (215, 215'; 515; 615, 615') einen Durchmesser hat, der geringer als der des Zuführabschnitts und größer als der des Nichtzuführabschnitt des ersten drehbaren Elements (214, 214'; 514, 514', 614; 714; 814; 914) ist, und
       das zweite drehbare Element in einem wartezustand vor dem Zuführvorgang die Trenneinrichtung (227, 227'; 527; 627) und das dritte drehbare Element (216, 216'; 516; 616, 616') berührt.
  2. Vorrichtung nach Anspruch 1, bei der das zweite drehbare Element (215, 215'; 515; 615, 615') im Wartezustand vor dem Zuführvorgang die Trenneinrichtung (227, 227'; 527; 627) und das dritte drehbare Element (216, 216'; 516; 616, 616') federnd berührt.
  3. Vorrichtung nach Anspruch 1, die ferner eine Antriebsquelle zum Antrieb des dritten drehbaren Elements (216, 216') und eine Kupplungseinrichtung (218) aufweist, die zwischen der Antriebsquelle und dem ersten drehbaren Element (214, 214') vorgesehen ist, wobei nach dem Anhalten des ersten drehbaren Elements das Blattmaterial (201) durch Zusammenwirken zwischen dem dritten drehbaren Element (216, 216') und dem zweiten drehbaren Element (215, 215') transportiert wird.
  4. Vorrichtung nach Anspruch 1, die ferner eine Einrichtung (202) zum Stapeln der Blattmaterialien (201) aufweist, wobei das erste drehbare Element (214, 214') am obersten Blattmaterial des Stapels in Bewegung setzbar ist.
  5. Vorrichtung nach Anspruch 1, bei der das zweite drehbare Element in zwei Walzen (215, 215'; 615, 615') unterteilt ist, wobei das erste drehbare Element (214, 214'; 614) zwischen diese eingefügt ist.
  6. Vorrichtung nach Anspruch 1, bei der das erste drehbare Element in zwei Walzen (514, 514') unterteilt ist, wobei das zweite drehbare Element (515) zwischen diese eingefügt ist.
  7. Bilderzeugungsgerät, das aufweist:
       eine Blattzuführvorrichtung nach einem der vorhergehenden Ansprüche, und
       eine Bilderzeugungseinrichtung (233, 235, 236, 301 - 304, 306, 401, 402) zum Erzeugen eines Bildes auf dem Blattmaterial (201), das durch die Blattzuführvorrichtung zugeführt wurde.
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 EP0279402A2 (de) 1988-08-24
EP0279402A3 EP0279402A3 (en) 1989-12-20
EP0279402B1 true EP0279402B1 (de) 1994-11-02

Family

ID=26374066

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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)

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

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EP0386737B1 (de) * 1989-03-08 1994-07-13 Canon Kabushiki Kaisha Bogenzuführvorrichtung
JP2963723B2 (ja) * 1990-04-20 1999-10-18 キヤノン株式会社 カットシート分離装置
DE69116749T2 (de) * 1990-07-06 1996-09-19 Canon Kk Blattzuführer
JP2943415B2 (ja) * 1991-03-19 1999-08-30 キヤノン株式会社 給紙装置及びそれを用いた画像形成装置
KR0131009Y1 (ko) * 1995-08-10 1999-03-20 김광호 전자사진 프로세서의 원고 자동 급지 장치
US5934664A (en) * 1996-06-25 1999-08-10 Seiko Epson Corporation Paper feeding apparatus and printer
DE60113075T2 (de) 2000-02-24 2006-06-22 Seiko Epson Corp. Papierförderer und Aufzeichnungsgerät derselben enthaltend

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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
EP0279402A2 (de) 1988-08-24

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