EP0065306B1 - Papierzuführeinrichtung einer Kopiermaschine - Google Patents

Papierzuführeinrichtung einer Kopiermaschine Download PDF

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Publication number
EP0065306B1
EP0065306B1 EP19820104313 EP82104313A EP0065306B1 EP 0065306 B1 EP0065306 B1 EP 0065306B1 EP 19820104313 EP19820104313 EP 19820104313 EP 82104313 A EP82104313 A EP 82104313A EP 0065306 B1 EP0065306 B1 EP 0065306B1
Authority
EP
European Patent Office
Prior art keywords
copy sheet
copy
control disc
pair
storage cassette
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
Application number
EP19820104313
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0065306A3 (en
EP0065306A2 (de
Inventor
Lajos Szekely
Gábor Bereck
László Dipl.-Masch.-Ing. Bernath
György Dipl.-Masch.-Ing. Neumann
Jószef Kiss
Lajos Szilveszter
Károly Toth
Jószef Jaszter
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.)
Irodagepipari Es Finommechanikai Vallalat
Original Assignee
Irodagepipari Es Finommechanikai Vallalat
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 Irodagepipari Es Finommechanikai Vallalat filed Critical Irodagepipari Es Finommechanikai Vallalat
Publication of EP0065306A2 publication Critical patent/EP0065306A2/de
Publication of EP0065306A3 publication Critical patent/EP0065306A3/de
Application granted granted Critical
Publication of EP0065306B1 publication Critical patent/EP0065306B1/de
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6502—Supplying of sheet copy material; Cassettes 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
    • 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

Definitions

  • the invention relates to a paper feed device of a copying machine, which has a rotatably driven photo drum, with a copy sheet magazine receiving a copy sheet stack, with a pair of feed rollers arranged at a distance from the discharge opening thereof, which, in adaptation to the copying cycle, is controlled to feed a copy sheet fed from the copy sheet magazine to the photo drum intermittently is drivable, and with a arranged above the copy sheet magazine, under pressure with the top copy sheet of the copy sheet stack for advancing this copy sheet with its leading edge in the roller gap of the (still stationary) feed roller pair interacting feed roller, which intermittently and by means of a rotating control disc drive device is drivable in time before the pair of feed rollers.
  • This known paper feed device is structurally very complex and, moreover, difficult to set, since a very precise adjustment of cam disks and levers is required for exact copy sheet guidance.
  • the components used for the control are very susceptible to wear due to their design, so that maintenance-free operation of the paper feed device over longer operating times is generally not to be expected.
  • Another disadvantage of the known paper feed device is that the switching on of the feed roller pair must be carried out separately not only in coordination with the rotation of the photo drum, but also in coordination with the driving of the feed roller by means of additional switching elements. Seen overall, a large number of precision parts are required for the known paper feed device, as a result of which the entire construction of the paper feed device is not only very complex to manufacture, but also in maintenance.
  • the object of the invention is to improve a paper feed device of the type mentioned at the outset in such a way that a long operating time and a control system which is less susceptible to faults are created, which nevertheless enable high control accuracy with a simple and robust construction.
  • toothed arc segments are arranged on the control disk, offset from one another on the circumference thereof, of which one dental arch segment interacts with a drive pinion of the feed roller and the other toothed arc segment interacts with a drive pinion of the feed roller pair, and in that the stack of copy sheets in the sheet magazine according to the respective height of the copy sheet stack is pressed against the feed roller from below.
  • the complicated and very difficult to adjust lever arrangements used in the known paper feed device are thus eliminated.
  • the invention makes it possible to control the movement cycle of the feed roller and the pair of feed rollers by means of a single control disk which rotates once for each paper feed cycle in chronological coordination with the rotation of the photo drum.
  • the drive times of these two conveying devices can be determined in a simple manner by the respective location of the dental arch segments on the control disk and the length of the dental arch segments.
  • the dental arch segments and the associated drive pinions must be arranged such that each dental arch segment engages with only one of the drive pinions and passes the other drive pinion without engagement. This can be achieved, for example, by different pitch circle diameters of the dental arch segments and the formation of one dental arch segment as an internally toothed segment and the other as an externally toothed segment. Depending on the direction of rotation of the control disk and the selection of the roller of the pair of feed rollers that has the drive pinion, the one gear segment then interacts with the drive pinion assigned to it via a reversing wheel.
  • both internally or externally toothed dental arch segments and correspondingly the drive pinions can be formed on the circumference of the control disk and the other dental arch segment protrude from an end face of the control disk.
  • both dental arch segments are preferably on the same axis side the control disc is arranged offset so that they both protrude axially therefrom, a circumferential groove for the non-contact passage of the control disc on the drive pinion interacting with the other dental arch segment being formed between the further projecting dental arch segment and the control disc.
  • the copy sheet magazine can be articulated at its end facing away from the feed roller and can be held by the pressure of a spring which is supported on the frame of the copying machine in such a way that the top copy sheet always rests on the feed roller with a certain pressure regardless of the height of the copy sheet stack. It is also possible to use a fixed copy sheet magazine which has a movable base plate which is pressed upwards in a resilient manner. However, the copy sheet magazine is preferably supported so as to be freely pivotable about an axis running parallel to the axis of the feed roller and arranged between it and the center of gravity of the copy sheet magazine for pressing the copy sheet stack under the feed roller. Alternatively or additionally, it is also possible to arrange a weight at the end of the pivotally supported copy sheet magazine facing away from the feed roller, by means of which the contact of the top sheet of the stack in each case with the feed roller is ensured.
  • FIG. 1 shows a control disk 1 which is driven via a shaft (not shown) of a copying machine for one revolution per copying operation.
  • the arc length 1 3 of the dental arch segment 3 is smaller than the arc length 1 4 of the dental arch segment 4.
  • the dental arch segments 3, 4 are axially offset from one another, the dental arch segment 3 of the end face of the control disc 1 is axially closer than the dental arch segment 4.
  • the control disc 1 facing part of the tooth arch segment 4 is provided with a circumferential groove 20, the width and depth of which is dimensioned such that the drive pinion 5 during the rotation of the control disc 1 this part of Dental arch segment can pass without contact.
  • the feed roller 8 can - as shown in FIG. 1 - be designed as a conveyor roller or in the form of several individual rollers arranged parallel to each other.
  • the copy sheet magazine 2 is designed in the form of a box open at the top, which is provided with so-called separators 11 and 12 at its end facing the feed roller 8.
  • the separators 11 and 12 are arranged such that they cover the upwardly open opening of the box in the region of the front corners by triangular plates 19.
  • the plates 19 cause the uppermost copy sheet to bulge during operation of the feed roller 8, thereby ensuring the separation of the top copy sheet from the copy sheet underneath.
  • the copy sheet magazine 2 is pivotally mounted on the longitudinal side of the box, from which projecting axis parts A and B, which are supported with their free end in the housing of the copying machine.
  • the axis parts A, B are arranged parallel to the axis of the feed roller 8 between the latter and the center of gravity of the copy sheet magazine 2. This ensures that the copy sheet magazine is swiveled clockwise without additional device under the force of gravity, as a result of which the top copy sheet is pressed against the feed roller 8 from below, regardless of the height of the copy sheet stack.
  • an additional counterweight 10 can be provided on the end of the copy sheet magazine 2 facing away from the feed roller 8 in order to ensure a sufficiently strong pressure between the top copy sheet and the feed roller 8 even when the copy sheet magazine 2 is almost empty.
  • two steering plates 13, 14 are arranged such that their ends facing a pair of feed rollers 15, 16 form a discharge slot.
  • the end of the lower steering plate 13 pointing towards the feed roller 8 is bent in the clockwise direction, so that even an incorrectly running copy sheet is caught with its leading edge and directed in the direction of the pair of feed rollers 15, 16.
  • control disk 1 When the copying process is started, the control disk 1 is rotated counterclockwise in the direction of the arrow by a drive device (not shown in detail here). Due to the engagement of the drive pinion 5 with the dental arch segment 3, the drive shaft le 7 the feed roller 8 rotated clockwise. As a result, the uppermost copy sheet of the copy sheet stack 9 is withdrawn from the copy sheet stack 9 and the leading edge of the copy sheet reaches the guide delimited by the two steering plates 13 and 14 and runs through the output slot in the roller gap delimited by the as yet non-driven feed roller pair 15, 16 on the feed rollers 15, 16.
  • the copy sheet is puffed up in the guide delimited by the steering plates 13 and 14, as a result of which the copy sheet is aligned with the feed rollers 15, 16 and is provided at the correct position for synchronous operation with the photo drum.
  • the copy sheet remains in this position until the drive pinion 6 engages with the dental arch segment 4. If this happens, the copy sheet engaging with its leading edge in the nip is conveyed away by the pair of feed rollers 15, 16.
  • the length 1 3 of the toothing of the dental arch segment 3 is dimensioned such that, taking into account the transmission ratio between the dental arch segment 3 and drive pinion 5 or feed roller 8, the top copy sheet with its leading edge reaches the roller gap delimited by the pair of feed rollers 15, 16 and also the top addressed supply loop of the copy sheet is formed in the guide formed by the steering plates 13, 14.
  • the length 1 4 of the dental arch segment 4 is dimensioned taking into account the individual gear ratios of the dental arch segment 4, drive pinion 6 and feed roller pair 15, 16 such that the copying sheet lying with its leading edge against the nip is conveyed to its full length.
  • Known sensors are provided on the bottom of the copy sheet magazine 2 which, when the copy sheet magazine is empty, ensure that the drive of the control disk 1 is switched off by means of corresponding switching devices.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
EP19820104313 1981-05-18 1982-05-17 Papierzuführeinrichtung einer Kopiermaschine Expired EP0065306B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HU139181A HU181330B (en) 1981-05-18 1981-05-18 Sheet feeding device particularly for electrophotographic duplicator
HU139181 1981-05-18

Publications (3)

Publication Number Publication Date
EP0065306A2 EP0065306A2 (de) 1982-11-24
EP0065306A3 EP0065306A3 (en) 1983-06-15
EP0065306B1 true EP0065306B1 (de) 1984-03-14

Family

ID=10954254

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820104313 Expired EP0065306B1 (de) 1981-05-18 1982-05-17 Papierzuführeinrichtung einer Kopiermaschine

Country Status (6)

Country Link
EP (1) EP0065306B1 (cs)
CS (1) CS235015B2 (cs)
DD (1) DD202408A5 (cs)
DE (1) DE3260067D1 (cs)
HU (1) HU181330B (cs)
PL (1) PL129959B1 (cs)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3335181A1 (de) * 1982-09-29 1984-03-29 Canon K.K., Tokyo Blattzufuhrvorrichtung
JPH04313528A (ja) * 1990-07-24 1992-11-05 Canon Inc 自動給紙装置
JPH0473554U (cs) * 1990-11-08 1992-06-29

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE791064A (fr) * 1971-11-08 1973-05-08 Xerox Corp Appareil d'avancement de feuilles
US3871763A (en) * 1973-08-02 1975-03-18 Pitney Bowes Inc Photo-conductive material handling device
US4025178A (en) * 1974-03-01 1977-05-24 Iwatsu Electric Co., Ltd. Electrophotographic copying apparatus having a dual cam synchronizing mechanism
JPS5911905B2 (ja) * 1975-12-18 1984-03-19 キヤノン株式会社 カヘンバイフクシヤキ

Also Published As

Publication number Publication date
DE3260067D1 (en) 1984-04-19
CS235015B2 (en) 1985-04-16
HU181330B (en) 1983-07-28
PL129959B1 (en) 1984-06-30
DD202408A5 (de) 1983-09-14
PL236489A1 (cs) 1982-12-06
EP0065306A3 (en) 1983-06-15
EP0065306A2 (de) 1982-11-24

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