EP0112276B1 - Vorrichtung für die Zuführung einzelner Blätter von einem Blattstapel - Google Patents

Vorrichtung für die Zuführung einzelner Blätter von einem Blattstapel Download PDF

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Publication number
EP0112276B1
EP0112276B1 EP83730101A EP83730101A EP0112276B1 EP 0112276 B1 EP0112276 B1 EP 0112276B1 EP 83730101 A EP83730101 A EP 83730101A EP 83730101 A EP83730101 A EP 83730101A EP 0112276 B1 EP0112276 B1 EP 0112276B1
Authority
EP
European Patent Office
Prior art keywords
sheets
stack
guide
separation
axis
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
EP83730101A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0112276A2 (de
EP0112276A3 (en
Inventor
Gerhard Lohrmann
Kurt Röhrer
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0112276A2 publication Critical patent/EP0112276A2/de
Publication of EP0112276A3 publication Critical patent/EP0112276A3/de
Application granted granted Critical
Publication of EP0112276B1 publication Critical patent/EP0112276B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/10—Sheet holders, retainers, movable guides, or stationary guides
    • B41J13/103—Sheet holders, retainers, movable guides, or stationary guides for the sheet feeding section

Definitions

  • the invention relates to a device for feeding individual sheets from a stack of sheets into the guide channel assigned to a platen roller by means of drivable separating rollers, a stacking base movable against the separating rollers and stops for the stack of sheets, and separating the individual sheets, separating the separating rollers in the lateral edge regions of the stack of sheets opposite assigned locking fingers .
  • Such devices for separating individual sheets from a stack of sheets are used, for example, in typewriters.
  • the known solution also uses a movable stacking base which is continuously pressed against the rollers separating the individual sheets by means of spring force.
  • the stackable floor which can be moved by spring force, pushes up more than just one sheet, so that the separating roller also transports two sheets which are pushed against the locking finger.
  • the locking finger also serves only as a stop and not for the actual separation of individual sheets in the area of the stacking base.
  • the present invention therefore assumes that both side stops for the sheet stack and separating fingers separating the individual sheets are assigned to the stack bottom at the level of the stack of sheets.
  • the locking fingers are arranged in corner areas of the sheet stack, so that a single sheet maintains a transverse position during the separation, as a result of which the separation process is not always favorable.
  • the curvature of the sheet to be pulled in its longitudinal direction is determined by a specially angled stacking base, whereby depending on the height of the stack of sheets, there are considerably different conditions for the position of the angled part of the stacking base, so the angled part of the stacking base is only in a parallel position to the separating fingers if the last sheet of a stack of sheets is below the separating fingers.
  • Such a stacked base proves to be relatively rigid and does not support the curvature of the single sheet to be separated, which makes the separation process easier.
  • the invention is therefore based on the object of developing the device described at the outset with a view to improved disengagement of a single sheet from the region of the laterally arranged locking fingers.
  • the stacking base is formed from one or more guide strips arranged symmetrically to the center of the single sheet, each of which is assigned a drivable separating roller opposite in the area of a front stop, and that the separating rollers at least at the start of the separating process Path overlap by the locking fingers against the feed direction of a single sheet are driven.
  • This solution has several advantages at the same time: the formation of the stacking base from individual guide strips in connection with the opposing arrangement of separating rollers allows the sheet to be arched transversely to the feed direction. Due to the fact that the locking fingers are assigned to the separating rollers in the lateral edge areas of the sheet stack, this transverse bulging of the single sheet is further promoted. Another advantage is that the retraction of the single sheet in a transversely arched shape allows the single sheet to be safely removed from the area of the locking fingers, after which the movement in the feed direction causes a single sheet to slide securely over the locking fingers.
  • the guide strips, laterally parallel guide walls and spacer rods are combined to form a rocker, which by means of a Axis of rotation is pivotally mounted in the side parts of the device frame.
  • the design of the seesaw and the swivel mounting enable the entire stack to be swiveled in the direction of the separating rollers.
  • rocker is assigned a control bridge, which consists of one or more spring-loaded levers pivoted by means of an axle in the side parts of the device frame. Regardless of the height of the stack of sheets, the rocker is therefore always pivoted in the direction of the separating rollers, the contact pressure being kept almost constant.
  • rocker serves as a guide for a guide wall adjustable to paper width.
  • the drive transmission for the separating rollers is carried out according to further features of the invention in that the separating rollers are arranged on an axis that can be driven by the platen roller and that the drive movement can be transmitted in the two directions of rotation by means of an electromagnetic clutch or by means of a drive train.
  • a front stop and the locking fingers are arranged on superposed axes.
  • the axes 3, 4, 5 are rotatably mounted in the side parts 1 and 2.
  • rocker 31 On the axis 3 there is a rocker 31 which consists of the guide walls 6 and 7 and the spacer rods 8 which are firmly pressed or loosely inserted therein.
  • Another guide wall 9 can be laterally displaced on the axis 3 or the spacer bar 8 according to the desired paper width and locked on the axis 3 by means of a locking lever (not described in more detail).
  • stop angles 10 and 11 are provided in the rear position, which can be shifted into locking positions or steplessly and are adjusted according to the respective length of the single sheet or a single form.
  • the separating rollers 17 and further drive parts to be described are located on the axis 4.
  • a control bridge 32 is formed, which is formed from the outer levers 12, which are fixedly connected to the axis 5, and an axis 13.
  • the axis 13 is in engagement with the guide walls 6, 7 and 9 of the rocker 31 via the elongated holes 6a.
  • the control bridge 32 is pivoted clockwise by two tension springs 14 and takes the rocker 31 supported thereon by the axis 13.
  • the stack of forms 16 supported on the guide strips 15 comes to rest against the separating rollers 17 located on the axis 4.
  • the contact pressure remains constant, even if the height of the stack of forms 16 changes.
  • the one limitation for the stack of forms 16 is formed by two front stops 18 which are mounted on the axis 19.
  • the device is u. a. driven by the clutch wheel 20, which is in engagement via a gear train 21 with a gear 23 which is fixedly connected to the platen roller 22.
  • the clutch wheel 20 is part of the electromagnetic clutch 24 which, when energized, transmits the rotary movement emanating from the platen roller 22 to the axis 4 in the same direction of rotation.
  • the upper sheet from the overlap area of the locking fingers 25 is used as paper hold-down removed and forced by the surface curvature of the guide strips 15 to an even larger belly formation in the longitudinal direction.
  • the side sheet corners held down can bend back at the same time, after having previously been displaced by the height offset of the separating rollers to the locking fingers 25 were curved.
  • the axis 4 with the separating rollers 17 are turned clockwise, ie. H. rotated in the feed direction for the single sheets.
  • the separating rollers 17 push the sheet into the effective range of the platen roller 22, after which the electromagnetic clutch 24 switches off.
  • the top form which bends back at the corners, is transported over the blocking fingers 25 and fed to the friction rollers 27 through a guide plate 26.
  • a sensor 29 is arranged, which senses the front edge of the single sheet and thus initiates a preprogrammed reversing movement which conveys the single sheet into the desired printing position.
  • the printed single sheet or form is ejected into a fold-away storage compartment 30, the advantage of which is that when the stack of forms 16 is inserted, one has full view of the stack of forms.
  • multilayer form sets can also be fed.

Landscapes

  • Sheets, Magazines, And Separation Thereof (AREA)
EP83730101A 1982-12-17 1983-10-24 Vorrichtung für die Zuführung einzelner Blätter von einem Blattstapel Expired EP0112276B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3247341 1982-12-17
DE19823247341 DE3247341A1 (de) 1982-12-17 1982-12-17 Vorrichtung fuer die zufuehrung einzelner blaetter von einem blattstapel

Publications (3)

Publication Number Publication Date
EP0112276A2 EP0112276A2 (de) 1984-06-27
EP0112276A3 EP0112276A3 (en) 1985-07-17
EP0112276B1 true EP0112276B1 (de) 1987-11-25

Family

ID=6181309

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83730101A Expired EP0112276B1 (de) 1982-12-17 1983-10-24 Vorrichtung für die Zuführung einzelner Blätter von einem Blattstapel

Country Status (3)

Country Link
US (1) US4613124A (enrdf_load_stackoverflow)
EP (1) EP0112276B1 (enrdf_load_stackoverflow)
DE (2) DE3247341A1 (enrdf_load_stackoverflow)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3568732D1 (en) * 1984-07-09 1989-04-20 Siemens Ag Paper supply holder for printing mechanisms having distance elements arranged on the depositing surface
US4795145A (en) * 1986-09-22 1989-01-03 Centronics Data Computer Corporation Cut sheet paper mechanism
DE3844325A1 (de) * 1988-12-27 1990-06-28 Mannesmann Ag Vorrichtung fuer die zufuehrung von einzelblaettern in bueromaschinen, insbesondere in matrixdruckern
JPH06164854A (ja) * 1992-11-19 1994-06-10 Canon Inc 複写装置及びその方法
US6357740B1 (en) 1998-11-30 2002-03-19 Canon Kabushiki Kaisha Sheet feeding apparatus and image forming apparatus
JP2008280162A (ja) * 2007-05-14 2008-11-20 Seiko Epson Corp 給紙装置
JP6115431B2 (ja) 2013-09-27 2017-04-19 ブラザー工業株式会社 シート搬送装置、及び画像読取装置
JP2023122273A (ja) * 2022-02-22 2023-09-01 株式会社リコー シート給送装置及びラミネート処理装置及び画像形成装置及び画像形成システム

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3599972A (en) * 1969-07-23 1971-08-17 Pitney Bowes Inc Paper tray for photocopy machine
US4023792A (en) * 1971-12-08 1977-05-17 Xerox Corporation Sheet feeding apparatus
US3857558A (en) * 1973-06-21 1974-12-31 Xerox Corp Paper cassette design with irregular bottom
US3883133A (en) * 1973-09-17 1975-05-13 Xerox Corp Movable pack advancer
US3866901A (en) * 1973-10-01 1975-02-18 Xerox Corp Reverse buckle feeder
CH611577A5 (en) * 1976-04-05 1979-06-15 Kurt Ruenzi Device on an office machine for the automatic feeding thereof with sheets
US4089402A (en) * 1976-07-01 1978-05-16 Hy Grip Products Co. Sheet feeding mechanism for an automatic typewriter
DE2735223C2 (de) * 1977-08-04 1981-09-17 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zum Bewegen blattförmiger Aufzeichnungsträger von bzw. zu Blattstapeln
CH620652A5 (enrdf_load_stackoverflow) * 1978-01-23 1980-12-15 Rutishauser Data Ag
DE2816448C3 (de) * 1978-04-15 1981-01-08 Helmut 7210 Rottweil Steinhilber Vorrichtung zum Zuführen von Papierblättern für eine schreibende Büromaschine
CH637899A5 (en) * 1979-05-29 1983-08-31 Albert Rutishauser Transport device for sheet-like recording media
JPS55160613A (en) * 1979-06-01 1980-12-13 Nec Corp Paper feeding mechanism
CH639345A5 (de) * 1979-09-07 1983-11-15 Kurt Ruenzi Zufuhrvorrichtung fuer papierblaetter fuer ein kopiergeraet.
US4492371A (en) * 1980-02-22 1985-01-08 Canon Kabushiki Kaisha Feeding device

Also Published As

Publication number Publication date
DE3247341C2 (enrdf_load_stackoverflow) 1988-08-25
DE3374674D1 (en) 1988-01-07
EP0112276A2 (de) 1984-06-27
US4613124A (en) 1986-09-23
DE3247341A1 (de) 1984-06-20
EP0112276A3 (en) 1985-07-17

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