EP0946353B1 - Method for forming three-dimensional soft shapes and packages of paper material, and package obtained by the method - Google Patents

Method for forming three-dimensional soft shapes and packages of paper material, and package obtained by the method Download PDF

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Publication number
EP0946353B1
EP0946353B1 EP97953743A EP97953743A EP0946353B1 EP 0946353 B1 EP0946353 B1 EP 0946353B1 EP 97953743 A EP97953743 A EP 97953743A EP 97953743 A EP97953743 A EP 97953743A EP 0946353 B1 EP0946353 B1 EP 0946353B1
Authority
EP
European Patent Office
Prior art keywords
sheet
yieldable
aperture
membrane
mould
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97953743A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0946353A1 (en
Inventor
Giorgio Trani
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0946353A1 publication Critical patent/EP0946353A1/en
Application granted granted Critical
Publication of EP0946353B1 publication Critical patent/EP0946353B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B31F1/0077—Shaping by methods analogous to moulding, e.g. deep drawing techniques

Definitions

  • This invention relates to a method for forming three-dimensional soft shapes and packages of paper material, and a package obtained by the method.
  • WO-A-96/03281 discloses a method for forming three-dimensional soft packages of paper material by positioning a composite of yieldable paper sheet and an impermeabiling film to face at least an aperture provided in a support, securing said composite to the surronding edges of said aperture, then stretching said composite to deform it.
  • document WO-A-96/03281 discloses the features of the preamble of claim 1.
  • US-A-2931064 discloses an apparatus for producing a pressed pattern in a paper comprising two frames of rubber cloth lined with sponge rubber and between which the paper to be processed is inserted.
  • EP 0130563 discloses an apparatus and method for forming a multicomponent tray from sheet material.
  • FR-A-654643 discloses an apparatus for forming by vacuum soft materials.
  • An object of the invention is to provide a method for forming three-dimensional soft shapes and packages of paper material.
  • a further object of the invention is to provide a method for forming very lightweight shapes and packages of low cost and able to be reduced to a minimal size after use.
  • a further object of the invention is to provide a method for forming shapes and packages which are biodegradable.
  • a further object of the invention is to provide a method for forming shapes and packages of the most varied configurations.
  • the method of the invention uses a substantially flat frame 2 comprising an aperture 4, the shape of which corresponds to the mouth of the package to be obtained.
  • a sheet 6 of yieldable paper having a degree of yieldability such as to enable it to be permanently extended transversely and longitudinally by at least 8%, and preferably 20%, and of very high ultimate tensile stress to ensure that the final desired configuration is obtained without tearing.
  • the paper material can comprise a number of sheets, or comprise added lacquers, inks or glues, or be formed by joining a number of sheets together with water-based glue.
  • the yieldable paper material is preferably produced by traditional methods which do not in themselves form part of the invention, and are not further described.
  • the sheet of paper material is then applied to the support aperture and secured to the closed edge of this aperture, for example by means of a ring 8.
  • a jet of compressed air is then fed onto said yieldable paper sheet to stretch the sheet and hence cause it to assume a substantially spherical cap shape (see dashed line in Figure 1).
  • an elastic membrane 10 of impermeable material on which a sheet of yieldable paper 12 is rested both being retained along the continuous edge of the aperture.
  • a jet of compressed air is then fed onto said membrane 10 to deform the membrane and stretch the yieldable paper sheet 12 lying against it.
  • the membrane 10 and superposed yieldable paper sheet 12 are again used, but stretching is effected by a punch 14, the head of which is shaped in accordance with the half-shell to be obtained. Again in this case the effect of the mechanical action performed by the punch is to stretch the yieldable paper.
  • This mechanical effect is preferably combined with a pneumatic effect, for which purpose the punch 14 comprises a plurality of channels 15 through which the paper material can be struck by an air jet (see Figure 4).
  • a counter-mould 16 reproducing the final shape of the object to be formed is applied to the frame on the same side as the yieldable paper sheet.
  • the compressed air jet acting on the membrane stretches the yieldable paper against the base of the cavity of the counter-mould 16, to obtain a shape complementary to said base.
  • the yieldable paper sheet is stretched by an air stream with polystyrene chips added.
  • particulate material is added to the air stream.
  • the yieldable paper sheet is stretched by producing a vacuum and hence drawing the yieldable paper sheet into the mould.
  • the frame consists of two half-moulds 2,2' movable relative to each other and each comprising a cavity bounded by an edge 18 having an interruption 20.
  • the half-mould cavities, their bounding edges and the edge interruptions perfectly mate when the two half-moulds are brought together.
  • the cavity of each half-mould is prolonged outwards as a conduit 22 which opens in correspondence with the interruption 20 provided in the edge 18 bounding the cavity, and mates with the adjacent conduit of the other half-mould.
  • a yieldable paper sheet 24 is rested on each half-mould, between the two facing yieldable paper sheets there being inserted an elastic membrane 26 of the balloon form with its mouth 28 positioned substantially in correspondence with the conduit 22.
  • the two half-moulds are then brought together and those parts of the sheets in mutual contact are joined together by known methods.
  • a compressed fluid is fed through the mouth 28 of the membrane 26 to stretch the two sheets of paper material retained by their edges, to cause them to adhere to the surface of the respective cavity.
  • the two half-moulds are spaced apart to allow removal of a paper package with a configuration corresponding to the cavity of the two half-moulds.
  • the compressed fluid is expelled from the balloon membrane, which is then extracted from the paper package.
  • This embodiment is particularly advantageous in obtaining packages having an outer envelope of yieldable paper and an inner container of impermeable material.
  • This embodiment also has the further advantage that when the product contained in the container has been consumed, the yieldable paper envelope can be torn up and disposed of in appropriate containers for paper, while the impermeable bag can be disposed of in a different container for sorted collection.
  • the method consists of inserting into a tunnel-shaped mould 30 with a profiled wall, a yieldable paper sheet 32 having its longitudinally edges joined together to form a tube. After applying two end plugs 34 to the mould, air is blown in through suitable apertures (not shown on the drawings) to obtain the shape 36 shown in Figure 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Paper (AREA)
  • Buffer Packaging (AREA)
  • Making Paper Articles (AREA)
  • Laminated Bodies (AREA)
EP97953743A 1996-12-05 1997-12-04 Method for forming three-dimensional soft shapes and packages of paper material, and package obtained by the method Expired - Lifetime EP0946353B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT96VE000038A ITVE960038A1 (it) 1996-12-05 1996-12-05 Metodo per realizzare forme e confezioni morbide tridimensionali in materiale cartaceo e confezione ottenuta con il metodo.
ITVE960038 1996-12-05
PCT/EP1997/006798 WO1998024617A1 (en) 1996-12-05 1997-12-04 Method for forming three-dimensional soft shapes and packages of paper material, and package obtained by the method

Publications (2)

Publication Number Publication Date
EP0946353A1 EP0946353A1 (en) 1999-10-06
EP0946353B1 true EP0946353B1 (en) 2003-04-23

Family

ID=11424224

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97953743A Expired - Lifetime EP0946353B1 (en) 1996-12-05 1997-12-04 Method for forming three-dimensional soft shapes and packages of paper material, and package obtained by the method

Country Status (7)

Country Link
EP (1) EP0946353B1 (it)
AT (1) ATE238165T1 (it)
AU (1) AU5754098A (it)
DE (1) DE69721300T2 (it)
ES (1) ES2197383T3 (it)
IT (1) ITVE960038A1 (it)
WO (1) WO1998024617A1 (it)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7150724B2 (en) 2002-06-05 2006-12-19 Cardinal Health 303, Inc. Syringe plunger driver system
ITVE20110063A1 (it) 2011-09-19 2013-03-20 Giorgio Trani Metodo di compensazione dimensionale di nastri di materiale fibroso.
ITVE20110071A1 (it) 2011-10-27 2013-04-28 Giorgio Trani Metodo per modificare le caratteristiche fisiche e/o chimiche di un nastro fibroso ed apparecchiatura per attuare il metodo.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR654643A (fr) * 1928-05-24 1929-04-09 Façonnage des feuilles souples ou malléables par le vide
US2800945A (en) * 1952-02-20 1957-07-30 Paul K Schilling Cup-shaped articles, and method and apparatus for making them
US2931064A (en) * 1957-09-10 1960-04-05 Matoba Hisashi Apparatus for producing a pressed pattern in paper
US4514353A (en) * 1983-06-29 1985-04-30 International Paper Company Apparatus and method for forming a multi-compartmented tray from a sheet material
IT1268987B1 (it) * 1994-07-22 1997-03-18 Giorgio Trani Metodo per confezionare in dosi e secondo una forma tridimensionale prodotti allo stato liquido, eventualmente solidificabili
ITVE960001A1 (it) * 1996-01-22 1997-07-22 Giorgio Trani Materiale cartaceo per realizzare confzioni morbide tridimensionali per prodotti allo stato solido, liquido, eventualmente solidificabili

Also Published As

Publication number Publication date
EP0946353A1 (en) 1999-10-06
DE69721300D1 (de) 2003-05-28
ITVE960038A1 (it) 1998-06-05
ATE238165T1 (de) 2003-05-15
DE69721300T2 (de) 2004-02-12
AU5754098A (en) 1998-06-29
WO1998024617A1 (en) 1998-06-11
ES2197383T3 (es) 2004-01-01

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