Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
  • B31F1/08—Creasing
  • B31F1/10—Creasing by rotary tools
• • 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

Definitions

• sheet here and hereafter, we mean a single sheet, either a strip, or a roll or a reel, from which a plurality of sheets is made, having a thickness comprised between some tenths of a millimeter and some millimeters.
• these plants are suitable to continuously receive a strip of the material, and are provided with creasing units able to perform on the strip transverse and longitudinal creasings distanced from each other by a determinate pitch.
• the Applicant has devised, tested and embodied the present invention to overcome the shortcomings of the state of the art and to obtain these and other purposes and advantages.
• a creasing device is used in a longitudinal or transverse work unit of a machine for at least longitudinal or transverse creasing and possible cutting operations on a sheet of relatively rigid material, such as for example corrugated cardboard for packaging, fed in a determinate work direction.
• the first creasing member is a first creasing disc and the second pre-creasing member is a second pre-creasing disc.
• the first creasing disc has a larger diameter than the second pre-creasing disc and the axis of rotation of the first disc is aligned and parallel on the same plane with the axis of rotation of the second pre-creasing disc, at the same height with respect to the plane on which the sheet being worked lies.
• - fig. 2 is a section from II to II of fig. 1 ;
• a creasing device 10 is included in a work unit 1 1, in this case longitudinal, of a machine 12 for at least creasing and possibly cutting a sheet of relatively rigid material, in this case corrugated cardboard for packaging, fed in determinate direction and sense of working indicated by the arrow F.
• a machine 12 Downstream of the work unit 1 1, the machine 12 provides an introduction unit, not shown in the drawings, and downstream of this a unit 13 for extracting the worked sheet.
• the work unit 1 1 is configured to perform the creasing and cutting of the sheet fed, in this case in a longitudinal direction, that is, parallel to the work direction F.
• the creasing device 10 also comprises pre-creasing means 41 disposed upstream of the first disc 32 in the work direction F, and configured to perform a pre-creasing operation that progressively deforms the material of the sheet to be worked before it is subjected to creasing proper, therefore preventing the material from exploding during the creasing operation.
• the lead-in surface 43 is shaped according to a profile with a desired geometry, advantageously a curvilinear segment, preferably a circular segment, which simulates and on the whole reproduces a segment of a much larger creasing disc normally used in industrial machines, generally with a diameter that can reach as much as 900 mm, thus obtaining the desired effect as described above, but without the weight, cost and bulk of discs used in industrial machines.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Making Paper Articles (AREA)
• Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Related Child Applications (2)

Publications (1)

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Cited By (2)

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Citations (4)

Family Cites Families (19)

• 2011
  • 2011-03-30 IT IT000047A patent/ITUD20110047A1/it unknown
• 2012
  • 2012-03-30 ES ES12717838.2T patent/ES2601822T3/es active Active
  • 2012-03-30 US US14/008,834 patent/US20140018225A1/en not_active Abandoned
  • 2012-03-30 PL PL12717838T patent/PL2691230T3/pl unknown
  • 2012-03-30 PT PT127178382T patent/PT2691230T/pt unknown
  • 2012-03-30 WO PCT/IB2012/000638 patent/WO2012131482A1/en active Application Filing
  • 2012-03-30 EP EP12717838.2A patent/EP2691230B1/en active Active

Patent Citations (4)

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