EP2223879A1 - Vorrichtung und Verfahren zum Falzen eines Blattes - Google Patents

Vorrichtung und Verfahren zum Falzen eines Blattes Download PDF

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Publication number
EP2223879A1
EP2223879A1 EP09154003A EP09154003A EP2223879A1 EP 2223879 A1 EP2223879 A1 EP 2223879A1 EP 09154003 A EP09154003 A EP 09154003A EP 09154003 A EP09154003 A EP 09154003A EP 2223879 A1 EP2223879 A1 EP 2223879A1
Authority
EP
European Patent Office
Prior art keywords
folding
sheet
nip
rollers
folding rollers
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.)
Withdrawn
Application number
EP09154003A
Other languages
English (en)
French (fr)
Inventor
Melle Jonker
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.)
Quadient Technologies France SA
Original Assignee
Neopost Technologies SA
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 Neopost Technologies SA filed Critical Neopost Technologies SA
Priority to EP09154003A priority Critical patent/EP2223879A1/de
Publication of EP2223879A1 publication Critical patent/EP2223879A1/de
Withdrawn legal-status Critical Current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
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/14—Buckling folders
    • B65H45/142—Pocket-type folders
    • B65H45/144—Pockets or stops therefor
    • B65H45/145—Pockets or stops therefor circular pockets
    • 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
    • B65H45/14—Buckling folders

Definitions

  • the invention relates to an apparatus for folding sheets according to the introductory portion of claim 1 and to a method for folding a sheet according to the introductory portion of claim 4.
  • this object is achieved by providing an apparatus according to claim 1.
  • the invention can also be embodied in a method according to claim 4.
  • the recirculation transport path can also receive the leading end of a sheet as it is fed prior to folding. Accordingly, no separate paths for recirculation and receiving a leading sheet portion prior to folding are required. Moreover, a folded or unfolded sheet may be turned over by an additional passage of the sheet through the recirculation transport path.
  • FIG. 1 An example of a folding apparatus according to the invention is shown.
  • the apparatus has a feeding path 1 bounded by guides 2, 3.
  • a pair of transport rollers 4, 5 defining a nip 6 in the feeding path 1 is provided for controlling the feeding of sheets 7 along the feeding path 1.
  • sheets 7, 8, 9 are shown in portions intersecting portions of rollers adjacent to a nip. In those instances, the sheets are to be considered as extending through the nip.
  • the intersecting representation has been chosen only to allow respective portions of a sheet in a nip to be represented in a clearly distinguishable manner.
  • a pair of folding rollers 10, 11 defines a folding nip 12 between the folding rollers 10, 11.
  • a folding nip extends over substantially the entire width of a paper path, to allow folds of a length of the largest width of sheets transported along the paper path to be made in the sheets passing through the folding nip.
  • a transport nip between transport rollers or between a transport roller and a folding roller may extend over only a small portion of the width of the paper path, since that is sufficient to engage the sheets being transported through the nip or held in the nip.
  • the feeding path 1 extends in a feeding direction 13 (see Figs. 1 , 5 and 9 ) along an input side of the folding rollers 10, 11 for transporting a leading end portion of a sheet 7, 8, 9 in the feeding direction 13 to a position extending along the folding nip 12 and the folding rollers 10, 11 at the input side of the folding rollers 10, 11 (see Figs. 1 and 5 ).
  • a pressing member in the form of a folding knife 14 Adjacent to the folding nip 12 on the input side of the folding nip 12 a pressing member in the form of a folding knife 14 is provided for pressing against a portion of a sheet 7, 8, 9, causing said portion to bend and to be urged into the folding nip 12.
  • a drive system for driving rotation of the folding rollers 10, 11 in senses of rotation 16, 17 in which sections of the folding rollers 10, 11 defining the folding nip 12 move away from the input side of the folding nip 12 to an output side of the folding nip 12 is depicted schematically in Fig. 1 only.
  • the drive system includes a motor unit 15 coupled to the folding roller 11 via a coupling 18.
  • the motor unit 15 is also coupled to a transport roller 4 via a coupling 19 and to a transport roller 21 of a pair of output transport rollers 21, 22, via a coupling 20.
  • a control unit 23 is connected to the motor unit 15 and to the couplings 18-20 for controlling the motor unit 15 and the couplings 18-20.
  • a recirculation transport path 24 extends from the output side of the folding rollers around one of the folding rollers 11 and is bounded by the folding roller 11 on one side and a guide 25 and transport rollers 26, 27 on the opposite side.
  • the folding roller 11 around which the recirculation transport path 24 extends is located downstream in the feeding direction 13 of the other one 10 of the folding rollers 10, 11.
  • the recirculation transport path 24 is connected to the feeding path 1 for transporting a folded sheet 7, 8 from the folding nip 12 to a position extending along the folding nip 12 and the folding rollers 10, 11 at the input side of the folding rollers 10, 11.
  • the transport roller 26 has a circumferential portion opposite a circumferential portion of the downstream one of the folding rollers 11.
  • the transport roller 26 and the downstream one of the folding rollers 11 defining a sheet holding nip 28 for holding a sheet 7, 8 in a position extending along the folding rollers 10, 11 on the input side of the folding nip 12. Traction transferred to a sheet in the sheet holding nip 28 may also be used for displacing a sheet through the sheet holding nip 28, for instance to feed a portion of a sheet back into the feeding path 1.
  • a leading end portion 29 of a sheet 7 is fed in the feeding direction to a first position extending along the folding rollers 10, 11 in the feeding direction 13 at the input side of the folding nip 12.
  • This position is shown in Fig. 1 , the leading portion of the sheet 7 being constituted by approximately the leading three quarter part of the sheet 7 including the position 30 on the sheet where a fold is to be made.
  • the transport rollers 26, 27 and the folding rollers 10, 11 rotate in senses of rotation opposite to the senses of rotation indicated by arrows 16, 17, 31, 32 and the folding knife 14 is still in the retracted position as shown in Fig. 2 .
  • the folding knife 14 is displaced to a slightly projecting bending position shown in Fig. 1 and the senses of rotation of the folding rollers 10, 11 are reversed so that the folding rollers 10, 11 and the transport rollers 26, 27 rotate in the senses of rotation 16, 17, 31, 32 shown in Fig. 1 .
  • the transport rollers 4, 5 defining a transport nip 6 in the feeding path 1 are driven in feeding senses of rotation 33, 34, preferably at the same circumferential speed, so that the sheet 7 buckles in the area around the position 30 where the fold is to be made.
  • the slightly projecting position of the folding knife 14 ensures that the sheet 7 bends towards the folding nip 12 as it is buckles and not away from the folding nip 12.
  • the folding knife 14 may be displaced to a third position projecting further towards the folding nip than the position shown in Fig. 1 .
  • the folding knife 14 is each time retracted briefly after the sheet 7 has been urged into the folding nip.
  • the first bent portion of the sheet 7 is flattened and a first fold 30 (see Fig. 2 ) is formed in the first bent portion of the sheet 7.
  • the folded sheet 7 is subsequently guided into the recirculation transport path 24 by the switch 41 in the recirculation position.
  • the folded sheet 7 is then transported around the downstream one 11 of the folding rollers 10, 11 to a second position extending along the folding nip 12 and the folding rollers 10, 11 at the input side of the folding nip 12 (see Fig. 3 ).
  • the transport rollers 4, 5 defining the transport nip 6 in the feeding path 1 are circulated in a sense 37, 38 (see Fig.
  • the senses of rotation of the transport rollers 4, 5 defining the transport nip 6 in the feeding path 1 are reversed back to the senses of rotation 33, 34 for transport in feeding direction 13 so that the sheet 7 is again bent in essentially the same manner as has been described with regard to the formation of the first fold 30, but now in an area around the position 35 of a second fold to be made in the sheet.
  • This second bent portion of the sheet 7 is subsequently urged into the folding nip 12.
  • the folding knife is preferably displaced to a position projecting to closely adjacent to the folding nip 12, so that the end of a panel of the sheet 7 that has been folded towards the second bent portion around the second folding position 35 is reliably urged into the folding nip.
  • the folding rollers 10, 11 are then again rotated further in the senses of rotation 16, 17 such that also the second bent portion of the sheet is flattened and a second fold 35 is formed in the second bent portion of the sheet 7.
  • the position of the switch 41 has been changed into the discharging position shown in Fig. 4 , so that, as the folded sheet 7 is transported out of the folding nip 12, the sheet 7 is discharged away from the output side of the folding rollers 10, 11. According to the present example, the sheet 7 is then transported further by driving rotation of the discharge rollers 21, 22 in the discharge sense of rotation 39, 40.
  • the recirculation transport path 24 serves both for recirculating a sheet 7 to the input side of the folding nip 12 ( Fig. 2 ) and for receiving a portion of a sheet prior to folding ( Figs. 1 and 3 ). A separate path for receiving a portion of a sheet prior to folding is therefore omitted.
  • the sheet in the first and second position is held in a sheet holding nip 28 between the downstream one of the folding rollers 11 and a transport roller 26.
  • This provides the advantage, that the sheet 7 can be held in different positions for causing the fold to be made in different positions. Therefore, changing the setting of the position of the fold does not require a stop to be displaced.
  • the sheet can be driven from two sides of the area where the fold is to be made simultaneously. This is advantageous for the accuracy with which the position of the fold can be controlled.
  • the sheet 8 is transported by the transport rollers 4, 5 defining a nip 6 in the feeding path 1, but less far than in the example shown in Fig. 1 .
  • the letter "A" in Figs. 5-8 indicates the position and orientation of an address on the sheet 8 which is to end up face down with a bottom and leading in discharge direction, so that the address will appear in the proper orientation in an envelope in which the folded sheet 8 will be inserted.
  • the senses of rotation of the folding rollers 10, 11 are reversed to the senses of rotation shown in Fig. 5 and the folding knife 14 pushes the sheet to the folding nip 12 so that the sheet 8 is folded in a folding position 50.
  • the folding knife 14 is each time retracted briefly after the sheet has been urged into the folding nip.
  • the switch 41 is in recirculation position and guides the folded sheet 8 around the folding roller 11 through the recirculation transport path 24.
  • the senses of rotation of the transport rollers 4, 5 defining a nip 6 in the feeding path 1 are reversed to the senses of rotation 37, 38 shown in Fig. 6 for transporting the sheet 8 in upstream direction.
  • the senses of rotation of the transport rollers 4, 5 defining a nip 6 in the feeding path 1 are reversed again to the senses of rotation 33, 34 shown in Figs. 5 , 7 and 8 , while the folding knife 14 pushes the buckle formed in sheet 8 around the position 55 for a second fold into the folding nip 12.
  • the address A would be facing upwardly and, accordingly, would not appear behind a downward facing window of an envelope into which the folded sheet would be inserted.
  • the Z-folded sheet is again guided into the recirculation transport path by the switch 41 as is shown in Fig. 7 and the senses of rotation of the transport rollers 4, 5 defining a nip 6 in the feeding path 1 are again reversed to the senses of rotation 37, 38 shown in Fig. 6 . This causes the folded sheet 8 to be transported upstream into the feeding path 1.
  • the senses of rotation of the transport rollers 4, 5 defining a nip 6 in the feeding path 1 are reversed again to the senses of rotation 33, 34 shown in Figs. 5 , 7 and 8 , when the trailing fold 50 in sheet 8 has been transported past the folding knife 14 or at least to a position close enough to the folding knife 14 for the trailing fold 50 to be diverted into the folding nip as a leading fold 50 when the folding knife 14 is displaced to a position projecting to close to the folding nip 12.
  • the folding knife 14 operates as a guide.
  • the z-folded sheet 8 is now transported through the folding nip with the address "A" face down and with the bottom side of the address "A" leading, so that the address can appear behind the window in a panel of an envelope facing down after the sheet 8 has been inserted into that envelope.
  • the sheet 8 is inverted to bring the address side of the sheet to the opposite side.
  • the position of the sheet 8 each time when folding of the sheet is initiated is controlled in a simple manner by a sheet presence detector 52 along the feeding path 1.
  • the reversal of the folding rollers 10, 11 is initiated in response to a predetermined amount of rotation of the transport rollers 4, 5 after detection of the leading edge of the sheet being fed.
  • the reversal of the transport rollers 4, 5 is initiated in response to a predetermined amount of rotation of the transport rollers 4, 5 after detection of the leading edge of the sheet being displaced upstream.
  • the turning function can also be applied without folding a sheet.
  • This is achieved by holding a folding knife 14 in the fully projecting position as a new sheet 9 is fed in the feeding direction by the transport rollers 4, 5 defining a nip 6 in the feeding path.
  • This causes the leading end of the sheet 9 to be guided into the folding nip 12 and the sheet 9 to be transported through the folding nip 12 without folding.
  • the folding knife 14 operates as a guide as during turning of a folded sheet shown in Fig. 8 .
  • the folding knife 14 is each time retracted briefly after the sheet has been urged into the folding nip 12.
  • the switch 41 causes the sheet 9 to be guided into the recirculation transport path 24.
  • the senses of rotation of the transport rollers 4, 5 defining the transport nip 6 in the feeding path 1 are reversed to the upstream direction 37, 38 shown in Fig. 10 .
  • the returned sheet 9 is transported upstream until the trailing edge 56 passed the folding knife 14 or at least has approached the folding knife 14 close enough to be urged into the folding nip.
  • the senses of rotation of the transport rollers 4, 5 defining the transport nip 6 in the feeding path 1 are reversed again to the feeding sense 33, 34 shown in Fig.
  • the sheet 9 has been turned about an axis parallel to the leading and trailing edges.
  • buckling of a sheet may also be induced by causing a leading end of the sheet arriving from the feeding path to abut against an abutment in the recirculation transport path, which then constitutes the pressing member, while a trailing part of the sheet is still driven in the feeding path.
  • the advantage is achieved that the recirculation transport path can also be used for receiving a leading part of a sheet prior to bending the sheet into the folding nip.
  • the folded sheets are discharged in upstream direction via the feeding path.
  • a switch for guiding sheets either into the discharge path or into the recirculation path can then be omitted. If a folded sheet is to be discharged via the feeding path, the folded sheet has to be passed through the recirculation transport path after folding has been completed. If the sheet is then to be turned over, the sheet has to be passed through the folding nip without folding and then again through the recirculation transport path. It is also possible to provide that a sheet is first turned over, for instance as described with reference to Figs. 9-11 and then folded instead of being directly discharged via the output transport path or the feeding path.

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  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
EP09154003A 2009-02-27 2009-02-27 Vorrichtung und Verfahren zum Falzen eines Blattes Withdrawn EP2223879A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09154003A EP2223879A1 (de) 2009-02-27 2009-02-27 Vorrichtung und Verfahren zum Falzen eines Blattes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09154003A EP2223879A1 (de) 2009-02-27 2009-02-27 Vorrichtung und Verfahren zum Falzen eines Blattes

Publications (1)

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EP2223879A1 true EP2223879A1 (de) 2010-09-01

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EP09154003A Withdrawn EP2223879A1 (de) 2009-02-27 2009-02-27 Vorrichtung und Verfahren zum Falzen eines Blattes

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2746205A1 (de) * 2012-12-18 2014-06-25 Neopost Technologies Schleifenfaltsystem zur Bereitstellung von C-, Z- oder halbgefalteten Blättern

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61183055A (ja) * 1985-02-07 1986-08-15 Fuji Xerox Co Ltd 紙折り装置
EP0469867A2 (de) * 1990-07-31 1992-02-05 Xerox Corporation Kompakte einzelne Faltplatte, Doppelrollenfalter mit z-Faltemöglichkeit
US5769774A (en) 1996-04-22 1998-06-23 Pitney Bowes Inc. Folder with recycling feed path

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61183055A (ja) * 1985-02-07 1986-08-15 Fuji Xerox Co Ltd 紙折り装置
EP0469867A2 (de) * 1990-07-31 1992-02-05 Xerox Corporation Kompakte einzelne Faltplatte, Doppelrollenfalter mit z-Faltemöglichkeit
US5769774A (en) 1996-04-22 1998-06-23 Pitney Bowes Inc. Folder with recycling feed path

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2746205A1 (de) * 2012-12-18 2014-06-25 Neopost Technologies Schleifenfaltsystem zur Bereitstellung von C-, Z- oder halbgefalteten Blättern
US9643811B2 (en) 2012-12-18 2017-05-09 Neopost Technologies Loop folding system for providing C, Z or half-fold sheets

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