EP1974898B1 - Method for forming three-dimensional containers of extensible paper material. - Google Patents

Method for forming three-dimensional containers of extensible paper material. Download PDF

Info

Publication number
EP1974898B1
EP1974898B1 EP08103028.0A EP08103028A EP1974898B1 EP 1974898 B1 EP1974898 B1 EP 1974898B1 EP 08103028 A EP08103028 A EP 08103028A EP 1974898 B1 EP1974898 B1 EP 1974898B1
Authority
EP
European Patent Office
Prior art keywords
paper material
forming
tubular element
mould
extensible paper
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
EP08103028.0A
Other languages
German (de)
French (fr)
Other versions
EP1974898A3 (en
EP1974898A2 (en
Inventor
Giorgio Trani
Marion Sterner
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 EP1974898A2 publication Critical patent/EP1974898A2/en
Publication of EP1974898A3 publication Critical patent/EP1974898A3/en
Application granted granted Critical
Publication of EP1974898B1 publication Critical patent/EP1974898B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING 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
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00Making flexible containers, e.g. envelopes or bags
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING 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
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/59Shaping sheet material under pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING 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
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2105/00Rigid or semi-rigid containers made by assembling separate sheets, blanks or webs
    • B31B2105/002Making boxes characterised by the shape of the blanks from which they are formed
    • B31B2105/0022Making boxes from tubular webs or blanks, e.g. with separate bottoms, including tube or bottom forming operations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING 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
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00Shape of flexible containers
    • B31B2160/10Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING 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
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/59Shaping sheet material under pressure
    • B31B50/592Shaping sheet material under pressure using punches or dies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING 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
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/59Shaping sheet material under pressure
    • B31B50/594Modifying the shape of tubular boxes or of paper bottle necks

Definitions

  • the present invention relates to a method for forming three-dimensional containers of extensible paper material.
  • a drawback of this system is the fact that the container presents a flat surface which to be decorated must be subjected to a printing process.
  • Another method consists of applying a sheet of plastic material over the cavity of a mould the inner surface of which is provided with a three-dimensional design, then making the sheet adhere to the mould walls to obtain for example a plastic cup.
  • Another method consists of forming the container by injection moulding.
  • This method presents the drawback that printing can be carried only after the container has been formed, by special methods which hence require a very costly process.
  • Methods are also known for forming filled and closed three-dimensional containers of substantially parallelepiped shape formed from coupled cardboard, they being produced starting from a tube of a web of material subjected to successive folding and welding for the side regions, and then closed to obtain for example a traditional milk container.
  • a drawback of these known methods is that the container obtained is linked to a geometry determined by folding, and in no way resembles a cup or tub in the traditional sense.
  • An object of the invention is to eliminate these drawbacks by providing a method which enables three-dimensional containers to be obtained the walls of which can be shaped to achieve a better ornamental appearance, improved product-customer communication facilities and an increased volume.
  • the method of the invention in the embodiment illustrated in Figures 1-4 foresees to form a substantially conical tubular element 8 from extensible paper material coupled to a thermoweldable polymer film, the longitudinal edges of which are joined together by thermowelding.
  • the tubular element is preheated and then inserted into a mould 10, comprising two openable half-moulds 12, 12', which is of greater width than the cone and comprises two undercuts 14.
  • the cone is secured at its open ends and is hermetically sealed. An air flow is then fed through an aperture 16 provided in a closure cap 18 so that the cone 8 is deformed by the air and adheres to the mould walls.
  • the two half-moulds 12, 12' are spaced apart so that the mould can be opened to extract the container in order to feed it to subsequent processing steps.

Landscapes

  • Making Paper Articles (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Cartons (AREA)
  • Paper (AREA)

Description

  • The present invention relates to a method for forming three-dimensional containers of extensible paper material.
  • Methods for forming three-dimensional containers of paper material are known. see for example EP-A-1588853 . One of these methods consists of wrapping about a tube a paper sheet with its surface corresponding to the lateral surface of the container, joining the superposed edges together and inserting a base to obtain for example an ice cream tub.
  • A drawback of this system is the fact that the container presents a flat surface which to be decorated must be subjected to a printing process.
  • Another method consists of applying a sheet of plastic material over the cavity of a mould the inner surface of which is provided with a three-dimensional design, then making the sheet adhere to the mould walls to obtain for example a plastic cup.
  • The drawback of this method is the fact that it can be used only to form plastic containers which are not of ecological materials and which also require costly and sophisticated processes for their formation.
  • Another method consists of forming the container by injection moulding.
  • This method presents the drawback that printing can be carried only after the container has been formed, by special methods which hence require a very costly process.
  • Methods are also known for forming filled and closed three-dimensional containers of substantially parallelepiped shape formed from coupled cardboard, they being produced starting from a tube of a web of material subjected to successive folding and welding for the side regions, and then closed to obtain for example a traditional milk container.
  • A drawback of these known methods is that the container obtained is linked to a geometry determined by folding, and in no way resembles a cup or tub in the traditional sense.
  • An object of the invention is to eliminate these drawbacks by providing a method which enables three-dimensional containers to be obtained the walls of which can be shaped to achieve a better ornamental appearance, improved product-customer communication facilities and an increased volume.
  • This and other objects which will be apparent from the ensuing description are attained according to the invention by a method for forming three-dimensional containers of extensible paper material as described in claim 1.
  • Some preferred embodiments of the present invention are further clarified hereinafter with reference to the accompanying drawings, in which:
  • Figures 1-4
    represent schematically a method for forming containers with undercuts,
  • As can be seen from the figures, the method of the invention in the embodiment illustrated in Figures 1-4 foresees to form a substantially conical tubular element 8 from extensible paper material coupled to a thermoweldable polymer film, the longitudinal edges of which are joined together by thermowelding. The tubular element is preheated and then inserted into a mould 10, comprising two openable half-moulds 12, 12', which is of greater width than the cone and comprises two undercuts 14.
  • The cone is secured at its open ends and is hermetically sealed. An air flow is then fed through an aperture 16 provided in a closure cap 18 so that the cone 8 is deformed by the air and adheres to the mould walls.
  • When the cone has adhered to the walls of the cooled mould the two half-moulds 12, 12' are spaced apart so that the mould can be opened to extract the container in order to feed it to subsequent processing steps.

Claims (1)

  1. A method for forming three-dimensional containers of extensible paper material, comprising:
    - forming a substantially truncated conical tubular element (8) from extensible paper material coupled to a thermoweldable polymer film, the longitudinal edges of which are joined together by thermowelding,
    - preheating said tubular element (8),
    - associating the tubular element obtained (8) in this manner with a mould (10) negatively reproducing at least the side wall of the container to be obtained,
    - feeding air flow into the mould (10) causing the tubular element (8) to deform and to adhere to the mould walls by utilizing the extensibility characteristics of the paper material,
    - closing said tubular element at at least one end.
EP08103028.0A 2007-03-29 2008-03-27 Method for forming three-dimensional containers of extensible paper material. Active EP1974898B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000019A ITVE20070019A1 (en) 2007-03-29 2007-03-29 METHOD FOR REALIZING THREE-DIMENSIONAL CONTAINERS IN EXTENDIBLE PAPER MATERIAL.-

Publications (3)

Publication Number Publication Date
EP1974898A2 EP1974898A2 (en) 2008-10-01
EP1974898A3 EP1974898A3 (en) 2014-03-19
EP1974898B1 true EP1974898B1 (en) 2017-05-24

Family

ID=39619198

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08103028.0A Active EP1974898B1 (en) 2007-03-29 2008-03-27 Method for forming three-dimensional containers of extensible paper material.

Country Status (3)

Country Link
EP (1) EP1974898B1 (en)
ES (1) ES2636619T3 (en)
IT (1) ITVE20070019A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5326774B2 (en) * 2009-04-24 2013-10-30 有限会社ホクオーパック Paper container
JP5515441B2 (en) * 2009-06-15 2014-06-11 有限会社ホクオーパック Paper container
JP7042131B2 (en) * 2018-03-28 2022-03-25 日清食品ホールディングス株式会社 How to make a paper container

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU171756B (en) * 1976-03-30 1978-03-28 Koho Es Gepipari Miniszterium Method and apparatus for producing conical tubes
JP2002274522A (en) * 2001-03-16 2002-09-25 Maruzen Group:Kk Safety cup and method for manufacturing safety cup
WO2003004256A1 (en) * 2001-07-06 2003-01-16 Innovative Packaging Corp. Method of thermoforming a container of corrugated material and container container formed thereby
ITBO20040235A1 (en) * 2004-04-21 2004-07-21 Luigi Fioretti EQUIPMENT FOR THE FORMATION OF A CONTAINER AND THE SHAPING OF ITS PROFILE, STARTING FROM A FILM MATERIAL

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP1974898A3 (en) 2014-03-19
EP1974898A2 (en) 2008-10-01
ES2636619T3 (en) 2017-10-06
ITVE20070019A1 (en) 2008-09-30

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