EP2691327B1 - Maschine zum stapeln gefalteter papierblätter, und verfahren zum stapeln gefalteter papierblätter - Google Patents

Maschine zum stapeln gefalteter papierblätter, und verfahren zum stapeln gefalteter papierblätter Download PDF

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Publication number
EP2691327B1
EP2691327B1 EP12742941.3A EP12742941A EP2691327B1 EP 2691327 B1 EP2691327 B1 EP 2691327B1 EP 12742941 A EP12742941 A EP 12742941A EP 2691327 B1 EP2691327 B1 EP 2691327B1
Authority
EP
European Patent Office
Prior art keywords
stack
sheets
folded
folded sheets
conveying
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.)
Active
Application number
EP12742941.3A
Other languages
English (en)
French (fr)
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EP2691327A2 (de
Inventor
Alessandro De Matteis
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.)
MTC Macchine Trasformazione Carta SRL
Original Assignee
MTC Macchine Trasformazione Carta SRL
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 IT000030A external-priority patent/ITPI20110030A1/it
Priority claimed from IT000031A external-priority patent/ITPI20110031A1/it
Application filed by MTC Macchine Trasformazione Carta SRL filed Critical MTC Macchine Trasformazione Carta SRL
Publication of EP2691327A2 publication Critical patent/EP2691327A2/de
Application granted granted Critical
Publication of EP2691327B1 publication Critical patent/EP2691327B1/de
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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
    • B65H31/00—Pile receivers
    • B65H31/30—Arrangements for removing completed piles
    • B65H31/3036—Arrangements for removing completed piles by gripping the pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B35/00—Supplying, feeding, arranging or orientating articles to be packaged
    • B65B35/30—Arranging and feeding articles in groups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/24—Delivering or advancing articles from machines; Advancing articles to or into piles by air blast or suction apparatus
    • B65H29/241—Suction devices
    • B65H29/243—Suction rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/38—Delivering or advancing articles from machines; Advancing articles to or into piles by movable piling or advancing arms, frames, plates, or like members with which the articles are maintained in face contact
    • B65H29/40—Members rotated about an axis perpendicular to direction of article movement, e.g. star-wheels formed by S-shaped members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/58—Article switches or diverters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H31/00—Pile receivers
    • B65H31/04—Pile receivers with movable end support arranged to recede as pile accumulates
    • B65H31/06—Pile receivers with movable end support arranged to recede as pile accumulates the articles being piled on edge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H31/00—Pile receivers
    • B65H31/04—Pile receivers with movable end support arranged to recede as pile accumulates
    • B65H31/08—Pile receivers with movable end support arranged to recede as pile accumulates the articles being piled one above another
    • B65H31/10—Pile receivers with movable end support arranged to recede as pile accumulates the articles being piled one above another and applied at the top of the pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H31/00—Pile receivers
    • B65H31/24—Pile receivers multiple or compartmented, e.d. for alternate, programmed, or selective filling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H31/00—Pile receivers
    • B65H31/30—Arrangements for removing completed piles
    • B65H31/3036—Arrangements for removing completed piles by gripping the pile
    • B65H31/3045—Arrangements for removing completed piles by gripping the pile on the outermost articles of the pile for clamping the pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H31/00—Pile receivers
    • B65H31/30—Arrangements for removing completed piles
    • B65H31/3081—Arrangements for removing completed piles by acting on edge of the pile for moving it along a surface, e.g. by pushing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H31/00—Pile receivers
    • B65H31/32—Auxiliary devices for receiving articles during removal of a completed pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B25/00—Packaging other articles presenting special problems
    • B65B25/14—Packaging paper or like sheets, envelopes, or newspapers, in flat, folded, or rolled form
    • B65B25/145—Packaging paper or like sheets, envelopes, or newspapers, in flat, folded, or rolled form packaging folded articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2220/00—Function indicators
    • B65H2220/09—Function indicators indicating that several of an entity are present
    • 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
    • B65H2301/33—Modifying, selecting, changing orientation
    • B65H2301/332—Turning, overturning
    • B65H2301/3322—Turning, overturning according to a determined angle
    • B65H2301/33222—90°
    • 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
    • B65H2301/40—Type of handling process
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/421—Forming a pile
    • B65H2301/4213—Forming a pile of a limited number of articles, e.g. buffering, forming bundles
    • 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
    • B65H2301/40—Type of handling process
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/421—Forming a pile
    • B65H2301/4217—Forming multiple piles
    • B65H2301/42172—Forming multiple piles simultaneously
    • 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
    • B65H2301/40—Type of handling process
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/422—Handling piles, sets or stacks of articles
    • B65H2301/4223—Pressing piles
    • 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
    • B65H2301/40—Type of handling process
    • B65H2301/44—Moving, forwarding, guiding material
    • B65H2301/447—Moving, forwarding, guiding material transferring material between transport devices
    • B65H2301/4471—Grippers, e.g. moved in paths enclosing an area
    • B65H2301/44716—Grippers, e.g. moved in paths enclosing an area oscillated in arcuate paths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/30—Chains
    • B65H2404/31—Chains with auxiliary handling means
    • B65H2404/311—Blades, lugs, plates, paddles, fingers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/60—Other elements in face contact with handled material
    • B65H2404/63—Oscillating, pivoting around an axis parallel to face of material, e.g. diverting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/60—Other elements in face contact with handled material
    • B65H2404/63—Oscillating, pivoting around an axis parallel to face of material, e.g. diverting means
    • B65H2404/632—Wedge member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/60—Other elements in face contact with handled material
    • B65H2404/65—Other elements in face contact with handled material rotating around an axis parallel to face of material and perpendicular to transport direction, e.g. star wheel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/19—Specific article or web
    • B65H2701/1924—Napkins or tissues, e.g. dressings, toweling, serviettes, kitchen paper and compresses

Definitions

  • the present invention relates to the field of converting paper and similar products for making paper material in packages of folded sheets starting from web material.
  • the invention relates to a machine for making stacks of folded paper sheets, or similar products.
  • the invention relates to a method for making stacks of folded sheets.
  • a type of such machines has a transfer roller capable of rotating about an axis and peripherally provided with a predetermined number of curved blades.
  • the blades extend starting from the roller in a direction which is opposite to the roller rotation direction and impart to the roller same a particular "star" shape from which the common name of "starwheel” derives.
  • the transfer roller is, therefore, equipped with a groove in which a feeding mechanism introduces in turn a sheet of a plurality of sheets already folded and fed in quick succession.
  • the rotating transfer roller transfers the fed folded sheets into the grooves from a feeding position to an discharge position.
  • a barrier is provided that causes the sheets to exit from the respective grooves, in such a way to accumulate the sheets on a formation table where a stack of overlapped sheets is formed.
  • the different arrangement of the barrier can cause the products to be stacked along a vertical axis, onto one another, or along a horizontal axis, with the napkins leaning at an edge one after the other.
  • separators operate for separating the last sheet of the already finished stack from the first sheet of the successive stack.
  • the table translates leaving the axis of the stack, which is located on it, substantially vertical up to arrange the stack on a conveyor belt.
  • the products can be directly released on a conveyor belt or other conveyor.
  • each starwheel unit is associated to a conveyor belt to it dedicated on which the production of the stack of sheets is made. More precisely, each of parallel conveyors, one for each starwheel unit and having a conveying direction that is orthogonal to the axis of the starwheel unit, works discontinuously, i.e. during the transfer of the formed stack of sheets it remains still, whereas once transferred the stack, while the successive stack is forming, it shifts to a position for receiving a successive stack.
  • each stack of sheets has to be conveyed forward up to a banding station, or packaging station, where the stack is pressed and wound by a film of plastic material forming a pack.
  • a banding station or packaging station
  • the conveying direction of the stack is subjected to many variations, even sudden variations, which can damage the product and oblige to complicated technical solutions.
  • a relevant and known drawback of the stacking machines of sheets of known type is a low flexibility.
  • starwheel units of known type are capable of making both large-sized stacks, also called “bulk” stacks, for sale to restaurants, cafeterias, communities, or alternatively, smaller stacks, also known as “flat” stacks, for household or personal use. Therefore, in order to switch from a production to the other it is necessary to use two different machines.
  • the folded sheets are stacked vertically and released overlapped on the formation table. So, the growth of the stack occurs vertically up to a predetermined height, rather low, and once completed its formation, the table withdraws from below of the stack for releasing it on a conveyor belt.
  • the folded sheets are released with the stack that grows horizontally, until it reaches a relevant length, and brought to the banding in a horizontal direction, as in the above cited application ITBO2006A000801.
  • the machine for making stacks of folded sheets of paper, or similar material, such as napkins, or paper tissues comprising:
  • the first predetermined stack direction can be selected from the group consisting of:
  • the second predetermined stack direction is selected from the group consisting of:
  • the transfer means may comprise, furthermore, a translation means that is arranged to translate said stack of folded sheets from said table to said conveying means.
  • a means for selectively operating said translation means and said rotation means for transferring said stack of folded sheets from said table to said conveying means so that said stack of folded sheets lays on said conveying means with vertical or horizontal axis.
  • the means for selectively operating is arranged to operate the translation means.
  • the "flat" stack of folded sheets has a substantially vertical axis both when it is located on the table and when it is located on the conveying means once it has been transferred to it.
  • the means for selectively operating is arranged to operate the rotation means.
  • the "bulk" stack of folded sheets turns from a configuration with substantially vertical axis when it is arranged on the table to a configuration with a substantially horizontal axis when it is located on the conveying means.
  • a banding section in which to said folded sheet stacks a banding film is applied, for example a film of plastic material, said banding section arranged along said conveying direction, such that once arranged on said conveying means, said folded sheet stacks are carried along a single conveying direction substantially rectilinear up to entering said banding section.
  • the rotation means is arranged to rotate a stack of folded sheets of an angle set between 80° and 110°, in particular equal to 90°.
  • the transfer means can be adapted to transfer the stack of folded sheets from the table to the conveying means through a combination of movements that comprise the above described rotation and at least one translation.
  • the conveying direction is substantially parallel to the rotation axis of said starwheel unit.
  • the table is substantially "comb-shaped", which comprises a plurality of portions alternated to a plurality of empty spaces, said transfer means configured pass through said empty spaces for picking up said stack of folded sheets from said table and transferring it onto said conveying means.
  • the rotation means comprises a first and a second grip portions that, in use, are arranged at opposite sides with respect to said stack, in order to form substantially a gripper, said first and second grip portions arranged to move towards/away from each other between a release configuration for said stack of folded sheets and a gripping configuration for said stack of folded sheets, and vice-versa.
  • the feeding means is arranged to feed a plurality of parallel rows of sheets to the starwheel unit, said starwheel unit comprising a plurality of coaxial starwheel elements each of which is arranged to process a respective row of sheets of said plurality of rows of sheets arranging in turn said sheets on said table, in order to obtain a respective stack of folded sheets for each row according to an axis oriented in a predetermined stack direction.
  • said plurality of starwheel units are configured to raise stacks of sheets at the same time on respective formation tables.
  • the transfer means and, in particular, the rotation means, can transfer at the same time a plurality of folded sheet stacks from said formation table to said conveying means.
  • This allows achieving a high production rate without the need of complex technical solutions for handling the stacks from the point of releasing the same onto the conveying means up to the banding section.
  • the first and second grip portions of the transfer means has a length suitable for picking up at a same time all the formed stacks of sheets, for example vertically, by said starwheel and put them, for example horizontally, onto said conveying means.
  • the rotation means comprises a first plurality of gripping portions and a second plurality of gripping portions, said first and said second plurality of gripping portions arranged in use at opposite sides with respect to said plurality of stacks of sheets and being movable towards/away from each other between a gripping configuration for said folded sheet stacks and a release configuration for said folded sheet stacks, and vice-versa.
  • the conveying means comprises a conveyor belt.
  • the conveying means comprises a plane fixed support and a smooth surface on which a plurality of handling rods movable with respect to said plane support are arranged to push slidingly said stack of folded sheets along said conveying direction. It is also possible a combination of the two systems.
  • the conveying means has an end arranged at a predetermined distance from the banding section, such that between the conveying means and the banding section a predetermined distance is present.
  • the conveying means is associated with a pushing means that is arranged to push said folded sheet stacks to provide a predetermined acceleration to said folded sheet stacks, said push being applied by said pushing means when said folded sheet stacks have to reach a correct position directly into the banding machine. More precisely, said push is enough to cause the movement of said stacks of sheets directly from said conveying means into said banding section.
  • the distance between two successive handling rods is higher than the width of the stack of folded sheets of a predetermined pitch, so that this pitch is travelled by the transfer means during the time necessary to the transfer means to reach the path of the conveying means, discharge the stack on the conveying means, and come avoid an interference with the path of the incoming conveying means.
  • the table is movable with respect to said starwheel unit, in order to follow the growth of said stack of folded sheets.
  • the transfer means is arranged to transfer alternatively, said first and second sheet stacks, or series of folded sheet stacks, on said conveying means.
  • first and second starwheel units operate in an alternated way, in such a way that, whereas the first starwheel unit is creating a stack of sheets, the second starwheel unit is not supplied of folded sheets and the stack of folded sheets that has been just formed by the latter is transferred by said transfer means onto said conveying means, and vice-versa.
  • first and second starwheel units can be specular with respect to a midplane of the conveying means.
  • a method for making stacks of folded paper sheets, or similar material, such as napkins, or paper tissues comprises the steps of:
  • a step is provided of banding said folded sheet stacks, said step of banding carried out by a banding section by applying a banding film, for example a sheet of plastic material, about said stack of folded sheets.
  • a banding film for example a sheet of plastic material
  • the conveying step of said plurality of folded sheet stacks to said banding section is made along a single conveying direction. Therefore, once transferred on said conveying means, the folded sheet stacks are conveyed to the banding section along a single direction substantially rectilinear.
  • the step of transferring comprises the further steps of:
  • a deviation means is arranged to deviate alternatively the plurality of sheets towards the first, or towards the second starwheel unit.
  • either of the first and second starwheel units has a plurality of protruding portions, between two following protruding portions a groove being obtained arranged to receive a sheet of the above described plurality of sheets.
  • the first starwheel unit is associated with a first introduction means arranged to put a sheet in a groove along a first introduction direction and the second starwheel unit is associated with a second introduction means arranged to put a sheet in a groove along a second introduction direction.
  • the deviation means is adapted to deviate alternatively said plurality of sheets towards said first and towards said second introduction means.
  • the deviation means comprises a deviation element having at least one guide surface arranged alternatively along the first introduction direction of the sheets in the first starwheel unit, or along the second introduction direction of the sheets in the second starwheel unit.
  • the deviation means comprises a deviation element having a first and a second guide surface arranged to be alternatively, and respectively, put along the first introduction direction of the sheets at the first starwheel unit and along the second introduction direction of the sheets at the second starwheel unit.
  • an actuating rod can be provided operatively connected to said deviation means, said actuating rod arranged to move selectively said deviation means along the first, or the second, introduction direction respectively.
  • the deviation means comprises at least one deviation roller equipped with:
  • the transfer means is arranged to transfer alternatively, said first and second sheet stacks, or series of stacks, of folded sheets on said conveying means.
  • a conveying means comprising a conveying unit for bringing a plurality of stacks, or packs, of sheets from a stacking section to a banding section, said conveying unit comprising a pushing means that is arranged to apply, during the movement of said conveying unit, an additional push on said folded sheet stacks to provide a predetermined acceleration to said folded sheet stacks, said additional push applied by said pushing means when said folded sheet stacks are approaching said banding section. More precisely, the above described additional push is enough to cause the movement of the stack of folded sheets towards said banding section, in a predetermined position of said banding section.
  • the pushing means applies a push on the folded sheet stacks through a resilient means loaded by a cam means arranged close to said banding section. This way, additional drives are not necessary on board of the conveying means.
  • a paper converting machine 1 comprises a starwheel unit 10 with at least one cylindrical body having a plurality of grooves 15, each of which is configured to receive a respective sheet 11 of a plurality of folded sheets 11. More in detail, the above described plurality of folded sheets 11 are carried in turn, for example between two transmission belts 200 and 201, along a feeding direction 101, for example a direction substantially tangential to starwheel unit 10. The latter rotates about a rotation axis 110, in the figure in a counterclockwise direction, and discharges in turn sheets 11 from grooves 15 onto formation table 20, 120.
  • the folded sheets are discharged to achieve a predetermined angular release position, in order to form a stack 50 of folded sheets 11. More in detail, the release of sheets 11 onto table 20, 120 is carried out, for example, by an extraction rod 18 arranged in the above described angular release position.
  • a cutting means can be provided, for example a cutting roller, not shown in the figures, arranged to divide longitudinally a sheet, or web, of paper into a predetermined number of strips that are then folded according to a predetermined configuration by folding means, also these not shown.
  • the strips of folded paper thus obtained can be then divided into folded strip portions, by a transversal cut and then folded further to form napkins.
  • Such process is of known type and then not shown in the figures .
  • a stack being formed While on a table 120 a stack being formed is present, on the other table 20 the stack already formed 50 is brought towards an outlet zone and then transferred by a transfer means 60, or 65, to said conveying means 30.
  • the latter move stack 50 of folded sheets 11 along a conveying direction 102 ( Fig. 9 ).
  • Table 20, or 120 is provided movable towards/away from starwheel unit 10, in order to follow the growth of stack 50 of folded sheets and to return eventually to a position of minimum distance from starwheel unit 10 once rotation means 60 have drawn stack 50.
  • Each table, 20, 120 can work as separator, which separates the last sheet 11 of a formed stack 50, from the first sheet 11' of the following stack 50'. More in detail, the following stack 50' starts to grow on a table, in the figure table 120, whereas the formed stack 50 is transferred from the other table 20.
  • a separator means can be provided, and a single formation table is used, in a way not described in detail since of known type in transfer systems of packages of folded sheets.
  • the transfer means can comprise translation means 65, shown advantageously only in Fig. 1 , that is arranged to translate stack 50 of folded sheets from table 20 to conveying means 30, and can comprise a rotation means 60 arranged to transfer stack 50 of folded sheets 11 from table 20 to conveying means 30 through a rotation ( Figs. 2-6 ) .
  • translation means 65 and rotation means 60 are provided both.
  • translation means 65 and rotation means 60 are selectively operated, in particular by a means for selectively operating not shown in the figures, for transferring stack 50 from table 20 to conveying means 30.
  • Rotation means 60 can be adapted to rotate formed stack 50 from a position in which it has the axis 55 arranged along a substantially vertical direction, when it is located on table 20, or 120, to a position in which the axis 55 is arranged along a substantially horizontal direction, at conveying means 30 ( Figs. 1 to 6 ).
  • stack 50 grows along a substantially horizontal direction.
  • table 20, or 120 in order to follow the growth of stack 50, are arranged movable along a horizontal direction 220, in order to contain laterally stack 50 that, during the growth, is supported by a plane support 255.
  • rotation means 60 is configured to cause the rotation of stack 50 from a position in which the axis 55 is arranged along a substantially horizontal direction, when it is located on table 20, or 120, to a position in which the axis 55 is arranged along a substantially vertical direction.
  • the translation means 65 is operated, so that the axis 55 of the "flat” stack of folded sheets remains substantially vertical also once transferred onto conveying means 30.
  • the rotation means 60 is operated, which brings the "bulk” stack 50 from a configuration with axis 55 substantially vertical, when it is arranged on table 20, to a configuration with axis 55 substantially horizontal, when it is arranged onto conveying means 30. Therefore, according to the kind of product, "bulk", or "flat”, the corresponding transfer means is selectively operated.
  • the step of conveying stack 50 from table 20 to conveying means 30 is made through a combination of movements, comprising the above described rotation of stack 50 of a predetermined angle, set between about 80° and about 110°, and at least one translation of rotation means 60.
  • the rotation of the stacks 50 made by rotation means 60 avoids the stacks 50 to move abruptly along conveying means 30 with a sudden variation of direction, in particular for bringing the sheet stacks 50 at a banding section, or packaging section 80.
  • the axis 55 of the stacks 50 remains horizontal and is substantially orthogonal to conveying direction 102 ( Fig. 9 ).
  • table 20 has a "comb" shape comprising a plurality of support portions 21 alternated to a plurality of empty spaces 22. Therefore, the transfer means 60, which is also "comb-shaped", is arranged to match the empty spaces 22 for picking up stack 50 of folded sheets and transferring it onto conveying means 30.
  • Rotation means 60 can comprise a first grip portion 61 and a second grip portion 62 that, in use, are arranged at opposite sides with respect to stack 50 and form substantially a gripper. More in detail, the first and second grip portions 61 and 62 of the gripper are provided that can be brought towards/away from each other between a gripping configuration of stack 50 and a release configuration of stack 50, and vice-versa. In particular, in the release configuration the gripping portions 61 and 62 can approach laterally stack 50 and pass from an external position, in which stack 50 is arranged between them ( Fig. 8A ), and a compression configuration in which the gripping portions 61 and 62 compress stack 50 between them for transferring it onto conveying means 30 through the above described rotation ( Fig. 8 ). After having rotated stack 50, the gripping portions 61 and 62 move away from each other to release stack 50 onto conveying means 30 ( Fig. 5 ).
  • the rotation means 60 transfer stack 50 of folded sheets from table 20 to conveying means 30 through the following combination of movements:
  • machine 1 provides a first starwheel unit 10 and a second starwheel unit 10'. More precisely, the first starwheel unit 10 is configured to receive a first plurality of folded sheets 11 that are carried in turn along a first feeding direction 101 and to overlap them on a first table 20, in order to form a first stack or series of stacks 50 of folded sheets, whereas the second starwheel unit 10' is configured to receive a second plurality of folded sheets 11' that are carried in turn along a second feeding direction 101' and to overlap them on a second table 20', in order to form a second stack 50' of folded sheets.
  • rotation means 60 is configured to transfer alternatively the stacks 50 and 50' of folded sheets from the respective tables 20 and 20' onto conveying means 30.
  • the first and second starwheel units 10 and 10' operate with a phase shift from each other for a predetermined time. Therefore, when stack 50 being formed on table 20 has achieved about the half of its final height, the transfer means 60 operate the conveying stack 50' from table 20' to conveying means 30, and vice-versa.
  • Such technical solution allows, in particular, to increase remarkably production rate and to limit in the meantime the size of machine 1.
  • Starwheel units 10 and 10' are mounted specularly to the midplane 130 of conveying means 30 and have the respective rotation axes 110 and 110' parallel to conveying direction 102.
  • starwheel unit 10 can comprise a plurality of starwheel elements, for example four coaxial starwheel elements 10a-10d.
  • the starwheel machine 10 is capable of making at the same time a plurality of stacks 50 of folded sheets, for example four stacks 50a-50d, which grow at the same time on respective formation tables 20a-20d.
  • rotation means 60 rotate at the same time the stacks 50a-50d during their transfer from the respective formation table 20a-20d to conveying means 30.
  • the gripping portions 61 and 62 have been indicated with a same length equal to the width of a package or stack 50. However, the gripping portions 61 and 62 may have a length suitable for picking up at a same time all the sheet stacks 50a-50d.
  • a banding section 80 is provided downstream of starwheel unit 10 in which to the stacks 50 of folded sheets a banding film is applied 81, for example of plastic material, obtaining banded stacks 85.
  • the banding section 80 is arranged along conveying direction 102 at the end of conveying means 30, which move the stacks 50 from when they are discharged from the transfer means 60 up to banding section 80.
  • Conveying means 30 can comprise a plane support 35, having low friction smooth surface, on which the stacks 50 of folded sheets are arranged, and a plurality of handling rods 36 movable with respect to the plane support 35 for pushing the stacks 50 of folded sheets along the above described conveying direction 102.
  • the sheet stacks 50 are transferred from plane support 35 on a platform 82.
  • the latter is provided movable along a direction substantially orthogonal to conveying direction 102, i.e. along a vertical direction, for example, by at least one actuator 83 for bringing stack 50 from a first height to a second height between which banding film 81 extends.
  • stack 50 when passing from the first to the second height encounters banding film 81 that is wound about stack 50 obtaining a banded stack, or package 85, that is transferred to an exit conveyor belt 86.
  • the means for banding the packages of folded sheets are indicated diagrammatically, and are well known to a skilled person, and then a detailed description thereof is not necessary.
  • a handling system is provided formed by handling rods 36 that are integral to a carriage 150 moved by a chain mechanism 40 along a loop comprising two substantially horizontal portions 40a and 40b and two substantially vertical portions 40c and 40d ( Fig. 13 ).
  • the conveying means 30 is arranged at a minimum distance from the banding section 80, but sufficient, to make it possible a movement of the rod inbetween.
  • conveying means 30 end at a minimum distance 200 from a lifting platform 81 of banding section 80 and therefore, between conveying means 30 and lifting platform 81 a distance is present 200 of minimum amplitude, enough to permit the passage of rod 36.
  • the lifting platform 82 is movable by an actuator 83, for example a hydraulic actuator, along a direction 122 substantially vertical between a first height ( Fig. 14 ) and a second height at which a banding film 81 is arranged that is wound about stack 50 ( Fig. 12 ).
  • an actuator 83 for example a hydraulic actuator
  • each carriage 150 has a pushing element 38 integral to handling rod 36. More precisely, at the distance 200 the pushing element 38 is adapted to push the sheet stacks 50 to provide a predetermined acceleration to the stacks 50 same. The above described push is enough for causing the stacks 50 of folded sheets to travel the distance 200 and, then to pass directly from conveying means 30 to platform 81 of banding section 80. More precisely, pusher 38 is adapted to push stack 50 to a position substantially centred with respect to the banding film 82, in order to ensure that the step of banding is made correctly.
  • the pushing element 38 Upon reaching a desired position the pushing element 38 translates forward with respect to carriage 150 operated by a mechanism comprising a fixed cam means 161 arranged at a predetermined position and cooperating with a mobile cam means 151 integral to carriage 150. More in detail, mobile cam means 151 is integral to a chain 45 mounted to carriage 150. Until it reaches the position at which the fixed cam means 161 is arranged, chain 45 and mobile cam means 151 to it integral remain still ( Fig. 14 ). When the mobile cam means 151 reaches an interference with fixed cam means 161, chain 45 starts to move ( Fig. 15 ) causing a forward translation of the pushing element 38 and, then, of handling rod 36 that pushes stack 50 forward. This produces an acceleration of stack 50 suitable for travelling all the distance 200 ( Figs.
  • the stacks 50 are contained laterally by side containing walls 32 and 33 ( Fig. 10 ).
  • conveying means 30 can comprise a conveyor belt, not shown in the figures.
  • machine 1 for making packages, or stacks 50 of folded sheets 11 of paper, or similar material, such as napkins, or paper tissues.
  • machine 1 comprises a feeding means 121 for feeding a plurality of sheets 11 along a predetermined feeding direction 101'.
  • machine 1 comprises a first starwheel unit 10 that is mounted rotatable about a first rotation axis 110 and a second starwheel unit 10' mounted rotatable about a second rotation axis 110' parallel to the axis 110.
  • each starwheel is configured to receive selectively the above described plurality of folded sheets 11 and to put them in turn onto a first table 20 and a second table 20', respectively.
  • the first and second starwheel units 10 and 10' form respectively a first and a second stack of folded overlapped sheets 50, and 50' ( Figs. 20 and 21 ).
  • a deviation means 250 is arranged to deviate alternatively the above described plurality of sheets 11 towards first starwheel 10 ( Fig. 20 ), or towards second starwheel 10' ( Fig. 21 ).
  • second starwheel 10' has a plurality of grooves 15', each of which is arranged to receive a sheet 11 of the above described plurality of sheets.
  • Each starwheel unit 10, or 10' is associated with respective introduction means 210, or 210', for example two conveyor belts 200 and 201, or 200' and 201', arranged to put a sheet 11 in a respective groove 15, or 15'. More precisely, the introduction means 200 supply sheets 11 to the starwheel 10 along a first introduction direction 101, whereas the introduction means 210' supply sheets 11 to the starwheel 10' along a second introduction direction 101'.
  • the deviation means 250 can comprise a deviation element 250 having at least one guide surface 251 arranged alternatively along the first introduction direction 101 for feeding sheets 11 towards first starwheel unit 10 ( Fig. 22 ), or along the second introduction direction 101' for feeding sheets 11 towards second starwheel unit 10' ( Fig. 23 ).
  • the deviation element 250 can be mounted rotatable about a rotation axis 255.
  • the deviation means 250 can comprise a deviation element 250', for example substantially wedge shaped, having a first guide surface 251a and of a second guide surface 251b which can be alternatively, and respectively, put along the first introduction direction 101 for feeding starwheel 10 ( Fig. 24 ) and along second introduction direction 101' for feeding starwheel 10' ( Fig. 25 ).
  • a deviation element 250' for example substantially wedge shaped, having a first guide surface 251a and of a second guide surface 251b which can be alternatively, and respectively, put along the first introduction direction 101 for feeding starwheel 10 ( Fig. 24 ) and along second introduction direction 101' for feeding starwheel 10' ( Fig. 25 ).
  • an actuating rod is provided 70 operatively connected to one end to deviation element 250' and at the other end to an cam 75. Therefore, the actuating rod 70 is arranged between an advanced position in which the deviation element 250' has the guide surface 251a arranged along the first introduction direction 101 and therefore sheets 11 are fed to the first starwheel unit 10 ( Fig. 24 ), and a withdrawn position, in which the deviation element 250' moves with the guide surface 251b along introduction direction 101' and therefore sheets 11 are fed to starwheel unit 10' ( Fig. 25 ).
  • handling rod 70 translates, thus withdrawing, or advancing, and causing the rotation of deviation element 250' about a rotation axis 255' in a rotation direction, or in the opposite direction.
  • the deviation means 250 comprises at least one deviation roller 25 having a first holding means, for example a suction means not shown in the figure, and for example as described in WO2011015893 in the name of the same applicant, for keeping sheets 11 at a first angular portion 26 of its surface, i.e. that correspond to centre angle ⁇ .
  • the first angular portion 26 ends at the first introduction means 210 comprises for example a second deviation roller 35, which also has a holding means, for example means suction, and arranged to transfer sheets 11 from the deviation roller 25 towards the introduction direction 101 to starwheel 10.
  • the deviation roller 25 also comprises a second holding means, also not shown in the figures, for holding, alternatively to the first holding means, sheets 11 on a second angular portion 27 of the surface of said deviation roller 25, i.e. that correspond to centre angle ⁇ . More in detail, the second angular portion 27 ends at second introduction means 210' comprising a third deviation roller 36, which also has a holding means, for example a suction means, and arranged lead sheets 11 from the deviation roller 25 towards introduction direction 101' of the starwheel 10'.
  • Other configurations are possible for deviating the sheets by means of vacuum transfer rollers. For example conveyor belts 200 and 200'a can contact directly the vacuum roller 11.
  • the introduction means 200 and 200' can be movable, in particular alternatively, towards/away from the deviation roller for transferring sheets 11 from the deviation roller 25 to starwheel 10, or 10'.
  • a conveying means is provided 30 arranged to bring the stacks 50 along a conveying direction 105 substantially parallel to rotation axes 110 and 110' of starwheel units 10 and 10'.
  • the first and second starwheel units 10 and 10' are arranged in symmetrical positions with respect to an axis of symmetry 130 orthogonal to conveying direction 105. In this way the same rotation means 60 can be used for transferring the stacks 50 and 50' from the respective formation tables 20 and 20' onto conveying means 30.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Discharge By Other Means (AREA)

Claims (13)

  1. Maschine (1) zum Erstellen von Stapeln (50) gefalteter Papierblätter oder eines ähnlichen Materials, wie etwa Servietten, Papiertüchern, umfassend:
    - ein Zuführmittel (121) zum Zuführen einer Vielzahl von Blättern (11) entlang einer vorbestimmten Zuführrichtung (101, 101');
    - einen Tisch (20, 20');
    - eine Sternradeinheit (10, 10'), die drehbar um eine Drehachse (110, 110') montiert ist, wobei die Sternradeinheit (10, 10') dazu angeordnet ist, eine Vielzahl von gefalteten Blättern aufzunehmen und sie wiederum auf den Tisch (20, 20') zu legen, um einen Stapel (50) gefalteter, sich überlappender Blätter gemäß einer ersten vorbestimmten Stapelrichtung zu bilden;
    - ein Fördermittel (30);
    - ein Transfermittel, das dazu angeordnet ist, einen fertigen Stapel (50) gefalteter Blätter von dem Tisch (20, 20') zu dem Fördermittel (30) zu transferieren, wobei das Fördermittel (30) dazu angeordnet ist, den Stapel (50) gefalteter Blätter entlang einer Förderrichtung (102) zu befördern;
    dadurch gekennzeichnet, dass das Transfermittel ein Drehmittel (60) umfasst, das dazu angeordnet ist, den Stapel (50) gefalteter Blätter zum Transferieren des Stapels (50) von dem Tisch (20, 20') zu dem Fördermittel (30) zu drehen, wobei das Drehmittel (60) dazu konfiguriert ist, die Achse des Stapels (50) aus der ersten vorbestimmten Stapelrichtung, wenn sich der gebildete Stapel (50) auf dem Bildungstisch (20, 20') befindet, in eine zweite vorbestimmte Stapelrichtung, wenn der sich der gebildete Stapel (50) auf dem Fördermittel (30) befindet, zu bringen, wobei das Transfermittel dazu angeordnet ist, den Stapel (50) gefalteter Blätter von dem Tisch (20, 20') zu dem Fördermittel (30) durch eine Kombination an Bewegungen zu transferieren, welche die Drehung des Stapels (50) gefalteter Blätter um einen Winkel zwischen 80° und 110° umfassen, wobei der Tisch im Wesentlichen "Kamm"-förmig ist und eine Vielzahl von Trägerabschnitten (21) umfasst, die im Wechsel mit einer Vielzahl von Leerräumen (22) stehen, wobei das Transfermittel dazu konfiguriert ist, an den Leerräumen positioniert zu werden, um den Stapel (50) gefalteter Blätter von dem Tisch (20, 20') aufzunehmen und den Stapel (50) auf das Fördermittel (30) zu transferieren, und wobei das Drehmittel (60) einen ersten Greifabschnitt (61) und einen zweiten Greifabschnitt (62) umfasst, die dazu angeordnet sind, sich zwischen einer Greifkonfiguration der gefalteten Blätterstapel (50) und einer Freigabekonfiguration der gefalteten Blätterstapel (50) und umgekehrt aufeinander zu und voneinander weg zu bewegen.
  2. Maschine (1) nach Anspruch 1, wobei die erste Stapelrichtung ausgewählt ist aus der Gruppe bestehend aus:
    - einer im Wesentlichen horizontalen Richtung;
    - einer im Wesentlichen vertikalen Richtung;
    - einer Richtung in einem vorbestimmten Winkel in Bezug auf eine horizontale Ebene, und wobei
    eine zweite vorbestimmte Stapelrichtung ausgewählt ist aus der Gruppe bestehend aus:
    - einer im Wesentlichen vertikalen Richtung, wenn die erste vorbestimmte Stapelrichtung im Wesentlichen horizontal ist;
    - einer im Wesentlichen horizontalen Richtung, wenn die erste vorbestimmte Stapelrichtung im Wesentlichen vertikal ist.
  3. Maschine (1) nach Anspruch 1, wobei das Transfermittel ferner ein Umsetzmittel umfasst, das dazu angeordnet ist, den Stapel (50) gefalteter Blätter von dem Tisch (20) zu dem Fördermittel (30) umzusetzen, und wobei ein Mittel zum selektiven Betreiben des Umsetzmittels und des Drehmittels (60) bereitgestellt ist, um den Stapel (50) gefalteter Blätter von dem Tisch (20) zu dem Fördermittel (30) zu transferieren, wobei das Mittel zum selektiven Betreiben dazu angeordnet ist, das Umsetzmittel während der Herstellung von Stapeln (50) gefalteter Blätter vom "flachen" Typ zu betreiben, sodass ein "flacher" Stapel (50) gefalteter Blätter im Wesentlichen mit der vertikalen Achse sowohl auf dem Tisch (20) als auch auf dem Fördermittel (30) nach dem Transfer bleibt; und wobei das Mittel zum selektiven Betreiben dazu angeordnet ist, das Drehmittel (60) während der Herstellung von Stapeln (50) gefalteter Blätter vom "Großmengen"-Typ in einer solchen Weise zu betreiben, dass der "Großmengen"-Stapel (50) gefalteter Blätter aus einer Konfiguration mit einer im Wesentlichen vertikalen Achse, wenn er auf dem Tisch (20) angeordnet ist, in eine Konfiguration mit einer im Wesentlichen horizontalen Achse, wenn er sich auf dem Fördermittel (30) befindet, gebracht wird.
  4. Maschine (1) nach Anspruch 1, wobei der Sternradeinheit (10, 10') nachgelagert ein Banderolierungsabschnitt (80) bereitgestellt ist, in dem eine Banderolierungsfolie (82) auf den Stapel (50) gefalteter Blätter aufgebracht wird, wobei der Banderolierungsabschnitt (80) entlang der Förderrichtung (102) angeordnet ist, sodass sich der Stapel (50) gefalteter Blätter nach der Anordnung auf dem Fördermittel (30) entlang einer einzelnen Förderrichtung (102) bewegt, die im Wesentlichen geradlinig bis zum Eingang des Banderolierungsabschnitts (80) verläuft, wobei insbesondere die Förderrichtung (102) im Wesentlichen parallel zu der Drehachse (110, 110') der Sternradeinheit (10, 10') verläuft.
  5. Maschine (1) nach Anspruch 1, wobei das Drehmittel (60) dazu angeordnet ist, den Stapel (50) gefalteter Blätter um einen Winkel zu drehen, der gleich 90° ist.
  6. Maschine (1) nach Anspruch 1, wobei das Zuführmittel (121) dazu angeordnet ist, eine Vielzahl von parallelen Reihen von Blättern der Sternradeinheit (10, 10') zuzuführen, wobei die Sternradeinheit (10, 10') eine Vielzahl von koaxialen Sternradelementen umfasst, von denen jedes dazu angeordnet ist, eine jeweilige Reihe von Blättern der Vielzahl von Reihen von Blättern zu verarbeiten, wobei die Blätter wiederum auf dem Tisch (20, 20') angeordnet werden, um einen jeweiligen Stapel (50) gefalteter Blätter für jede Reihe gemäß einer Achse zu erstellen, die in eine vorbestimmte Stapelrichtung ausgerichtet ist.
  7. Maschine (1) nach Anspruch 1, wobei das Drehmittel (60) dazu ausgelegt ist, zur gleichen Zeit die Vielzahl von gefalteten Blätterstapeln (50) von dem Bildungstisch (20, 20') zu dem Fördermittel (30) zu transferieren.
  8. Maschine (1) nach Anspruch 1, wobei das Fördermittel (30) ein Ende nahe einem Banderolierungsabschnitt (80) aufweist, wobei das Fördermittel (30) einem Schiebemittel (38) zugeordnet ist, das dazu angeordnet ist, die gefalteten Blätterstapel (50) zu schieben, um eine vorbestimmte Beschleunigung an die gefalteten Blätterstapel (50) bereitzustellen, wobei das Schiebemittel (38) dazu konfiguriert ist, den Schub in der Förderrichtung (102) aufzubringen, um den Stapel (50) direkt zu dem Banderolierungsabschnitt (80) zu verschieben.
  9. Maschine (1) nach Anspruch 8, wobei das Fördermittel (30) einen ebenen Träger (35) umfasst, auf dem eine Vielzahl von Handhabungsstangen (36), die in Bezug auf den flachen Träger (35) bewegbar sind, den Stapel (50) gefalteter Blätter entlang der Förderrichtung (102) bewegt, wobei insbesondere der Abstand zwischen zwei aufeinanderfolgenden Handhabungsstangen (36) größer als die Breite des Stapels (50) gefalteter Blätter ist, um das Fördermittels (30) zu veranlassen, kontinuierlich zu funktionieren.
  10. Maschine (1) nach Anspruch 1, umfassend:
    - eine erste Sternradeinheit (10), die dazu angeordnet ist, von einem ersten Zuführmittel eine Vielzahl von gefalteten Blättern aufzunehmen, die wiederum entlang einer ersten Zuführrichtung (101) getragen werden, und diese auf einem ersten Tisch (20) zu überlappen, um einen ersten Stapel (50) gefalteter Blätterstapel (50) zu bilden;
    - eine zweite Sternradeinheit (10'), die dazu angeordnet ist, von einem zweiten Zuführmittel eine zweite Vielzahl von gefalteten Blättern aufzunehmen, die wiederum entlang einer zweiten Zuführrichtung (101') getragen werden, und diese auf einem zweiten Tisch (20') zu überlappen, um einen zweiten Stapel (50') gefalteter Blätter zu bilden, wobei insbesondere die erste und die zweite Sternradeinheit (10, 10') dazu konfiguriert sind, in einer abwechselnden Weise zu funktionieren, und zwar in einer solchen Weise, dass, während die erste Sternradeinheit (10) einen Stapel (50) von Blättern erzeugt, die zweite Sternradeinheit (10') nicht mit gefalteten Blättern versorgt wird und der Stapel (50) gefalteter Blätter, der soeben durch letztere gebildet wurde, auf das Fördermittel (30) transferiert wird, um umgekehrt.
  11. Maschine (1) nach Anspruch 1, umfassend:
    - eine erste Sternradeinheit (10), die drehbar um eine erste Drehachse (110) montiert ist, wobei die erste Sternradeinheit (10) dazu angeordnet ist, die Vielzahl von gefalteten Blättern aufzunehmen und sie wiederum auf einen ersten Tisch (20) zu legen, um einen ersten Stapel (50) sich überlappender gefalteter Blätter bereitzustellen;
    - eine zweite Sternradeinheit (10'), die drehbar um eine zweite Drehachse (110') montiert ist, welche parallel zu der ersten Drehachse (110) verläuft, wobei die zweite Sternradeinheit (10') dazu angeordnet ist, die Vielzahl von gefalteten Blättern aufzunehmen und sie wiederum auf einen zweiten Tisch (20') zu legen, um einen zweiten Stapel (50') sich überlappender gefalteter Blätter bereitzustellen;
    wobei jede Sternradeinheit (10, 10') unter der ersten und der zweiten Sternradeinheit (10, 10') eine Vielzahl von vorstehenden Abschnitten aufweist, wobei zwischen zwei aufeinanderfolgenden vorstehenden Abschnitten eine Rille (15, 15') erlangt wird, die dazu angeordnet ist, ein Blatt (11) der Vielzahl von Blättern aufzunehmen;
    und wobei zwischen dem Zuführmittel und der ersten und der zweiten Sternradeinheit (10, 10') ein Umlenkmittel (250, 250') angeordnet ist, um die Vielzahl von Blättern abwechselnd in Richtung der ersten oder der zweiten Sternradeinheit (10, 10') umzulenken.
  12. Maschine (1) nach Anspruch 11, wobei die erste Sternradeinheit (10) einem ersten Einführungsmittel (210) zugeordnet ist, wobei das erste Einführungsmittel (210) dazu angeordnet ist, ein Blatt (11) in eine Rille (15) entlang einer ersten Einführungsrichtung zu legen, und wobei die zweite Sternradeinheit (10') einem zweiten Einführungsmittel (210') zugeordnet ist, wobei das zweite Einführungsmittel (210') dazu angeordnet ist, ein Blatt (11) in eine Rille (15') entlang einer zweiten Einführungsrichtung zu legen, wobei das Umlenkmittel (250, 250') dazu angeordnet ist, die Vielzahl von Blättern (11) abwechselnd in Richtung des ersten und in Richtung des zweiten Einführungsmittels (210, 210') umzulenken.
  13. Verfahren zum Erstellen von Stapeln (50, 50') gefalteter Papierblätter oder eines ähnlichen Materials, wie etwa Servietten, Papiertüchern, umfassend die Schritte:
    - Zuführen einer Vielzahl von gefalteten Blättern (11) durch ein Zuführmittel (121) an eine Sternradeinheit (10, 10') entlang einer Zuführrichtung (101, 101');
    - Freigeben der Vielzahl von gefalteten Blättern durch die Sternradeinheit (10, 10') auf einen Tisch (20), um einen Stapel (50, 50') sich überlappender Blätter zu bilden;
    - Transferieren des Stapels (50, 50') gefalteter Blätter durch ein Transfermittel von dem Tisch (20) zu einem Fördermittel (30), das dazu angeordnet ist, den Stapel (50, 50') gefalteter Blätter entlang einer Förderrichtung (102) zu befördern;
    - Handhaben des Stapels (50, 50') gefalteter Blätter entlang einer Förderrichtung (102);
    dadurch gekennzeichnet, dass der Transferschritt von dem Tisch (20) zu dem Fördermittel (30) durch eine Kombination von Bewegungen ausgeführt wird, die eine Drehung des Stapels (50, 50') gefalteter Blätter um einen Winkel zwischen 80° und 110° umfasst, wobei die Drehung durch ein Drehmittel (60) dazu konfiguriert ist, die Achse des Stapels aus einer ersten vorbestimmten Stapelrichtung, wenn sich der gebildete Stapel auf dem Bildungstisch (20) befindet, in eine zweite vorbestimmte Stapelrichtung, wenn sich der Stapel auf dem Fördermittel (30) befindet, zu bringen;
    wobei der Tisch (20) im Wesentlichen "Kamm"-förmig ist und eine Vielzahl von Trägerabschnitten (21) umfasst, die sich mit einer Vielzahl von Leerräumen (22) abwechseln, wobei das Transfermittel dazu konfiguriert ist, an den Leerräumen (22) positioniert zu werden, um den Stapel (50) gefalteter Blätter von dem Tisch (20, 20') aufzunehmen und den Stapel (50) auf das Fördermittel (30) zu transferieren, und wobei das Drehmittel (60) einen ersten Greifabschnitt (61) und einen zweiten Greifabschnitt (62) umfasst, die dazu angeordnet sind, sich zwischen einer Greifkonfiguration der gefalteten Blätterstapel (50) und einer Freigabekonfiguration der gefalteten Blätterstapel (50) und umgekehrt aufeinander zu und voneinander weg zu bewegen.
EP12742941.3A 2011-03-29 2012-03-23 Maschine zum stapeln gefalteter papierblätter, und verfahren zum stapeln gefalteter papierblätter Active EP2691327B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT000030A ITPI20110030A1 (it) 2011-03-29 2011-03-29 Macchina per la produzione di pacchi di fogli piegati in carta e relativo metodo di produzione
IT000031A ITPI20110031A1 (it) 2011-03-29 2011-03-29 Macchina perfezionata per la produzione di pacchi di fogli piegati in carta e relativo metodo di produzione
PCT/IB2012/051413 WO2012131557A2 (en) 2011-03-29 2012-03-23 Machine for producing stacks of folded sheets of paper and method therefor

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EP2691327A2 EP2691327A2 (de) 2014-02-05
EP2691327B1 true EP2691327B1 (de) 2019-05-08

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US (1) US20140190132A1 (de)
EP (1) EP2691327B1 (de)
ES (1) ES2733642T3 (de)
WO (1) WO2012131557A2 (de)

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WO2012131557A3 (en) 2013-07-04
US20140190132A1 (en) 2014-07-10
WO2012131557A2 (en) 2012-10-04
EP2691327A2 (de) 2014-02-05

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