EP0645335A1 - Dispositif pour guider le bord avant d'une feuille à plier et machine à plier pourvue d'un tel dispositif - Google Patents

Dispositif pour guider le bord avant d'une feuille à plier et machine à plier pourvue d'un tel dispositif Download PDF

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Publication number
EP0645335A1
EP0645335A1 EP94110513A EP94110513A EP0645335A1 EP 0645335 A1 EP0645335 A1 EP 0645335A1 EP 94110513 A EP94110513 A EP 94110513A EP 94110513 A EP94110513 A EP 94110513A EP 0645335 A1 EP0645335 A1 EP 0645335A1
Authority
EP
European Patent Office
Prior art keywords
sheet
laminae
folding
folded
bent
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
EP94110513A
Other languages
German (de)
English (en)
Other versions
EP0645335B1 (fr
Inventor
Vittorio Rigoli
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.)
Rigoli Fime SpA
Original Assignee
Rigoli Fime SpA
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Filing date
Publication date
Application filed by Rigoli Fime SpA filed Critical Rigoli Fime SpA
Publication of EP0645335A1 publication Critical patent/EP0645335A1/fr
Application granted granted Critical
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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
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/20—Zig-zag folders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/34—Modifying, selecting, changing direction of displacement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2401/00—Materials used for the handling apparatus or parts thereof; Properties thereof
    • B65H2401/10—Materials

Definitions

  • the present invention relates to a device suitable for guiding in sure way in a desired direction, in a paper sheet folding machine, the front edge of a sheet to be multi-folded accordion-like on itself, during the initial sheet folding phase, and to a folding machine provided with such a device.
  • Folding sheet machines for sheets having a considerable length and width, suitable to fold said sheets more times on themselves in one or both directions so as to obtain an accordion-like, or zigzag, folded sheet, such as for instance the folding machine described and illustrated in Italian Patent N.2.083.484 and in the corresponding European Patent N.0.171.486 of the same applicant, are already known.
  • the main problem in folding machines is to provide a means which may assure that the front edge of the sheet to be multi-folded on itself be surely directed towards an element of the folding unit during the initial phase of forming the first fold and that said fold, as well as the subsequent folds, be perfect, namely that it does not show dog eared corners, wrinkles or other defects due to the front edge of the sheet to be folded which, in the initial phase, could possibly hit against an element of the folding unit or other unwanted obstacle, be it fixed or movable, in that said front edge is not guided in a sure and reliable manner in the desired direction and along the pre-established path.
  • the purpose of this invention is therefore to solve such problem in a simpler, less expensive, and most of all more reliable manner.
  • This is achieved by providing a shaped guiding assembly which directs in a sure way the front edge of the sheet to be folded in the desired direction and in the required position during the initial phase of forming the first fold, without any possibility of unwanted deviations and without encountering hindrances that might result in the formation of the so-called dog eared corners in the sheet front edge, whereupon said guiding assembly is retracted to a non-operative position, outside the sheet stacking area for the formation of folds, and the folding operation goes on in the usual way, imparting to the sheet, in succession, different folds as required.
  • an assembly of guiding laminae for the sheet to be folded, said laminae being made of a suitably shaped elastically flexible material which is endowed with shape memory, and being moved forward parallel to the sheet to be folded in a continuous advancing phase, from a retracted position in a suitable stationary slide housing, which slide is suitably provided parallel to the sheet advancing path, until the laminae reach an area between the folding means where the sheet is to be accumulated in order to form in it bends that are preliminary to forming folds, said elastically flexible laminae having their ends protruding from the slide in a curved or bent shape, said ends having moreover been imparted a shape memory in respect of said bending, said bent shape of the laminae allowing a reliable guide action for the front edge of the sheet to be folded which is directed towards one of the two folding stations so that, after the sheet front edge has reached the first folding station, the assembly of laminae is moved backwards and returned into its slide housing, while the remaining
  • the forward and backward movements of the elastically flexible laminae assembly may be carried out by means of various drives of a known type and an embodiment of this invention may consist of a T-shaped, fixed geometry rocker lever, the control rod of which, corresponding to the T stem, is articulated on a slider bar to which is connected the end of each one of the flexible laminae which is opposite in respect of the elastically bent operative end of the laminae which end acts as a guide element for the front edge of the sheet to be folded, the opposite end of said control rod being pivoted, similarly to a first class lever fulcrum, on the central part of a cross-arm of the rocker lever, one end of said cross-arm of the rocker lever being actuated by a drive system for the advancement of the flexible laminae assembly, and the other one being biosed upon by an antagonistic means moving the laminae assembly to the retracted position into the slide housing for the laminae.
  • Figures 1, 2 and 3 are schematic vertical elevation views, respectively showing three different operational phases of a folding machine, namely an initial phase of an of a cross-arm 14.
  • the opposite end of said laminae 6, indicated by 15, is bent upward in a permanent way, which is to say with a memory of such bent shape, in the direction towards the upper folding roller 10, passing through a suitable slide housing consisting of said lower plate 3 and by a further plate 16 below plate 3.
  • the cross arm 14 is articulated on a rocker lever member 17 consisting of a rod 18 and a cross-arm 19 which is pivoted in 20.
  • One end of the cross-arm 19 of the rocker lever 17 is connected to a traction-type drive means, such as for instance an electromagnet 21, while the other end of arm 19 of the rocker lever 17 is joined to a return member, such as for instance a spring 22.
  • a traction-type drive means such as for instance an electromagnet 21
  • a return member such as for instance a spring 22.
  • the electromagnet 21 is energized, so that the rod 18 of the rocker lever 17 swings in clockwise direction, reaching the position indicated in this Figure.
  • the laminae 6 are caused to move forward to the slide housing consisting of plates 3 and 16, whereby their end 15, which is elastically bent, is situated in the space between the folding rollers 10 and 11 and the tape 7, namely in the position in which the sheet front edge exits from its slide housing consisting of plates 2 and 3 and is directed in a sure way upwards before engaging tape 7.
  • said left tape section 7' has an upward movement, and therefore the tape front edge, as a consequence of the upward movement of continuous tape 7 left section 7', tends to be directed upwards as shown in Figure 1, subsequently being compressed and then held between the first upper folding roller 10 and the left section 7' of the continuous tape 7 of folding system 7, 10, 11.
  • a set of laminae 6 ( Figure 4), made from an elastically flexible material susceptible to be shaped in a permanent way, namely with shape memory, such as for instance armonic steel or suitable synthetic resins, are mutually connected by means operative cycle, after a first reversal condition of the folding unit, and after a second reversal condition of the folding unit, to obtain an accordion-like or zizag- folded sheet, respectively; and
  • Figure 4 is a schematic top plan view of the plurality of laminae made of an elastically flexible material, as seen from above, in combination with a sheet feeding or advancing roller means consisting of a plurality of separate small rollers.
  • a folding machine of the known type (as known from the aforecited patents) will first be described in a schematic form, to which the elastically flexible laminae means according to the present invention is provided for surely guiding the feeding, in the desired direction, of the front edge of the sheet to be folded.
  • the sheet to be accordion-like folded is indicated in Figures 1-3 by the reference numeral 1 while wound on itself like a roll.
  • a first section of said sheet is passed within a slide housing consisting of an upper plate 2 and a lower plate 3.
  • Said sheet, passing between the upper cylinder 4 and the lower cylinder 5, one of which is the driving cylinder, proceeds until it exits through the output end 2' of the sheet-guiding means consisting of said elements 2 and 3.
  • the laminae means 6 is caused to be retracted, provisionally straightening, into the straight slide housing consisting of plates 3 and 16 due to the de-energization of the electromagnet 21, whereby spring 22, acting on the other end of arm 19 of the rocker lever 17, causes the latter's rod 18 to swing towards the left side ( Figure 2), thereby causing the backward movement of laminae 6 to a retracted position inside the slide housing 3, 16, in a temporarily straightened condition.
  • laminae 6 owing to their flexibility, can easily revert to a straight shape when they are retracted into their housing and, owing to their shape memory, they shall be ready to take again their shape, curved at their free operating end, as soon as they will be pushed again out of their housing as a consequence of electromagnet 21 being energized, at the initial phase of insertion of a new sheet to be accordion-like folded.
  • tape 7 consists of a series of belts arranged side by side and, as it may be understood observing Figure 4, the various blades 6 pass through a series of small rollers 23, that in their whole constitute the roller 5, said rollers 23 being spaced apart from one another and mounted on a common shaft 24, that can be for instance a driving shaft.
  • rocker arm 17 The structure of the forward and backward movement element of the blade means, herein exemplified as rocker arm 17, may be replaced by any device that is suitable for this purpose, and the same applies to the rocker lever control system, here consisting of an electromagnet and a spring, that may be replaced by any other known control system suitable for the purpose.

Landscapes

  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
EP94110513A 1993-09-24 1994-07-06 Dispositif pour guider le bord avant d'une feuille à plier dans une machine à plier Expired - Lifetime EP0645335B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI932050A IT1272680B (it) 1993-09-24 1993-09-24 Dispositivo atto a guidare in modo sicuro nella direzione desiderata, in una macchina piegatrice di fogli, il lembo anteriore di un foglio da ripiegare piu' volte su se' stesso a fisarmonica, nella fase iniziale di piegatura, e macchina piegatrice dotata di tale dispositivo
ITMI932050 1993-09-24

Publications (2)

Publication Number Publication Date
EP0645335A1 true EP0645335A1 (fr) 1995-03-29
EP0645335B1 EP0645335B1 (fr) 1997-09-17

Family

ID=11366944

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94110513A Expired - Lifetime EP0645335B1 (fr) 1993-09-24 1994-07-06 Dispositif pour guider le bord avant d'une feuille à plier dans une machine à plier

Country Status (3)

Country Link
EP (1) EP0645335B1 (fr)
DE (1) DE69405669T2 (fr)
IT (1) IT1272680B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2003078A1 (fr) * 2007-06-15 2008-12-17 Océ-Technologies B.V. Appareil pliable
US8506465B2 (en) 2006-04-07 2013-08-13 Oce-Technologies B.V. Method and an apparatus for folding a medium

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR842423A (fr) * 1938-02-16 1939-06-12 Dispositif de guidage des feuilles de papier dans les plieuses à poches
DE2110964A1 (de) * 1970-05-29 1971-12-09 Polygraph Leipzig Falzwerk fuer Taschenfalzmaschinen
EP0037650A1 (fr) * 1980-03-31 1981-10-14 HARPER & TUNSTALL LIMITED Machines à plier en accordéon
EP0171486A1 (fr) * 1984-05-08 1986-02-19 RIGOLI F.I.M.E. S.p.A. Plieuse pour plier en accordéon des matériaux en feuilles
DE3738496A1 (de) * 1987-03-31 1988-10-13 Fuji Xerox Co Ltd Verfahren und vorrichtung zum falten von papier

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR842423A (fr) * 1938-02-16 1939-06-12 Dispositif de guidage des feuilles de papier dans les plieuses à poches
DE2110964A1 (de) * 1970-05-29 1971-12-09 Polygraph Leipzig Falzwerk fuer Taschenfalzmaschinen
EP0037650A1 (fr) * 1980-03-31 1981-10-14 HARPER & TUNSTALL LIMITED Machines à plier en accordéon
EP0171486A1 (fr) * 1984-05-08 1986-02-19 RIGOLI F.I.M.E. S.p.A. Plieuse pour plier en accordéon des matériaux en feuilles
DE3738496A1 (de) * 1987-03-31 1988-10-13 Fuji Xerox Co Ltd Verfahren und vorrichtung zum falten von papier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8506465B2 (en) 2006-04-07 2013-08-13 Oce-Technologies B.V. Method and an apparatus for folding a medium
EP2003078A1 (fr) * 2007-06-15 2008-12-17 Océ-Technologies B.V. Appareil pliable

Also Published As

Publication number Publication date
ITMI932050A0 (it) 1993-09-24
DE69405669T2 (de) 1998-01-22
DE69405669D1 (de) 1997-10-23
IT1272680B (it) 1997-06-26
EP0645335B1 (fr) 1997-09-17
ITMI932050A1 (it) 1995-03-24

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