EP0525796B1 - Paper or cardboard core for winding reels of paper, coardboard, plastic materials or the like - Google Patents

Paper or cardboard core for winding reels of paper, coardboard, plastic materials or the like Download PDF

Info

Publication number
EP0525796B1
EP0525796B1 EP92113097A EP92113097A EP0525796B1 EP 0525796 B1 EP0525796 B1 EP 0525796B1 EP 92113097 A EP92113097 A EP 92113097A EP 92113097 A EP92113097 A EP 92113097A EP 0525796 B1 EP0525796 B1 EP 0525796B1
Authority
EP
European Patent Office
Prior art keywords
core
paper
moisture
cardboard
proof material
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
EP92113097A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0525796A1 (en
Inventor
Rinaldo Ferretti
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.)
CARTIERA DI FERRARA SpA
Original Assignee
CARTIERA DI FERRARA SpA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11337707&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0525796(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by CARTIERA DI FERRARA SpA filed Critical CARTIERA DI FERRARA SpA
Publication of EP0525796A1 publication Critical patent/EP0525796A1/en
Application granted granted Critical
Publication of EP0525796B1 publication Critical patent/EP0525796B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/04—Kinds or types
    • B65H75/08—Kinds or types of circular or polygonal cross-section
    • B65H75/10—Kinds or types of circular or polygonal cross-section without flanges, e.g. cop tubes

Definitions

  • the present invention relates to a paper or cardboard core for winding reels of paper, cardboard, plastic materials or other materials in sheets which are wound in reels.
  • Reel cores which are constituted by a plurality of strips of paper or cardboard which are wound in a spiral, glued together and partially overlapped: said cores have different diameters, thicknesses and lengths according to requirements.
  • the strips constituting the core are glued with various types of adhesive products, both organic (such as for example starches, dextrins, polyvinyl alcohol, latexes, resins of all kinds) and inorganic (such as for example sodium silicate).
  • organic such as for example starches, dextrins, polyvinyl alcohol, latexes, resins of all kinds
  • inorganic such as for example sodium silicate
  • the adhesive products used are usually dispersed in an aqueous solution, and at the end of the core forming operations, a certain amount of residual water remains in said core; in order to allow the adhesive to perform its function and in order to allow the core to have the required strength characteristics, part of this water must be eliminated by evaporation.
  • the core absorbs moisture, but this usually does not create great problems; if instead the storage place is drier than one in which the core would be in equilibrium, said core loses more moisture in the exposed regions than in the regions toward the inside of the bundle, and this will cause the inflection of said core.
  • a core having the features recited in the preamble of claim 1 is known from the prior document DE-U-1 921 536.
  • the technical aim of the present invention is to obviate the above problems, i.e. to provide a paper or cardboard core for winding reels of paper, cardboard, plastic materials or the like which maintains its geometric and mechanical characteristics unchanged and independent of the moisture characteristics of the environment in which it will be placed.
  • an object of the present invention is to achieve the above aim with a simple structure which is relatively easy to produce, safe in use and relatively modest in cost.
  • a method for obtaining the core according to the invention is claimed in claim 10.
  • the core according to the invention in a preferred embodiment, is constituted by a certain number of paper strips (20 to 40) which partially overlap one another, are wound in a spiral and glued together with glues of various kinds, using conventional automatic winding machines.
  • the obtained core has a length which can even exceed three meters and is suitable to support reels which can reach weights in excess of 4.5 tons.
  • At least one of the strips, proximate to the outer surface of the core, is made of an impermeable or moisture-proof material, and in this manner the evaporation or absorption of moisture through the outer surface of the core is prevented; elimination of the glueing water occurs, in this case, through the inner surface of said core.
  • the moisture-proof strip can be constituted by a film of plastic material, or by a film of plastic material coupled to a sheet of paper or cardboard or also coupled between two sheets of paper or cardboard; the film can advantageously be made of polyethylene; the strip can also be made of polythene-reinforced paper.
  • the moisture-proof strip provided in another embodiment is constituted by paper treated so as to be moisture-proof at the source, such as pergamyn, parchment and impregnated paper.
  • glues or adhesives and the machines used for the manufacture of the core they can be of any kind; obviously, preference will be given to adhesives and machines which produce a core with small amounts of residual glueing water to be evaporated.
  • the strip can also be made of paper or cardboard with one or both surfaces treated with spray-on or sprinkle paints or resins or other products.
  • the strip may be constituted by a thin film of metallic material, possibly coupled to paper or cardboard. It is stressed that whereas for conventionally manufactured cores it is difficult to ensure a camber of less than 2 mm/m, cores manufactured according to the invention can ensure cambers of less than 0.5 mm/m, regardless of the ambient conditions in which the core will be stored.

Landscapes

  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Paper (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
EP92113097A 1991-08-02 1992-07-31 Paper or cardboard core for winding reels of paper, coardboard, plastic materials or the like Expired - Lifetime EP0525796B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO910302A IT1252919B (it) 1991-08-02 1991-08-02 Anima di carta o cartone per l'avvolgimento di bobine di carta, cartone, materie plastiche o simili
ITBO910302 1991-08-02

Publications (2)

Publication Number Publication Date
EP0525796A1 EP0525796A1 (en) 1993-02-03
EP0525796B1 true EP0525796B1 (en) 1996-10-09

Family

ID=11337707

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92113097A Expired - Lifetime EP0525796B1 (en) 1991-08-02 1992-07-31 Paper or cardboard core for winding reels of paper, coardboard, plastic materials or the like

Country Status (5)

Country Link
EP (1) EP0525796B1 (it)
AT (1) ATE143910T1 (it)
DE (1) DE69214379T2 (it)
ES (1) ES2095365T3 (it)
IT (1) IT1252919B (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013003340A3 (en) * 2011-06-29 2013-03-14 Invista Technologies S.A R.L. Tube core for humid environment

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2292369A (en) * 1994-08-17 1996-02-21 Newark Group Ind Inc Paper core for rolled thin film
US7007887B2 (en) 2003-11-11 2006-03-07 Sonoco Development, Inc. Tubular core with polymer plies
EP2497736A1 (en) * 2011-03-10 2012-09-12 Cartiera di Ferrara S.P.A. Core for winding reels

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1921536U (de) * 1964-05-07 1965-08-19 Canadian Ind Rohrtraeger fuer textilien.
DE7338060U (de) * 1975-05-22 Maiworm & Co Hartpapierhülse für Garne, Fäden oder dergleichen
DE7529197U (de) * 1975-09-16 1976-01-08 Fa. Emil Adolff, 7410 Reutlingen Huelse als garn- oder fadentraeger

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3170489A (en) * 1961-01-27 1965-02-23 Sonoco Products Co Method of making plastic impregnated paper tubes and resulting product
DE3413619A1 (de) * 1984-04-11 1985-10-24 DVG Deutsche Verpackungsmittel GmbH, 8505 Röthenbach Verfahren zur herstellung einer verpackungshuelse und verpackungshuelse
DE8705042U1 (de) * 1987-04-04 1987-07-09 Paul & Co Inh. K. Kunert & Söhne GmbH & Co, 97772 Wildflecken Hülsenförmiger Wickelkern für dünnes bahnförmiges Wickelgut

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7338060U (de) * 1975-05-22 Maiworm & Co Hartpapierhülse für Garne, Fäden oder dergleichen
DE1921536U (de) * 1964-05-07 1965-08-19 Canadian Ind Rohrtraeger fuer textilien.
DE7529197U (de) * 1975-09-16 1976-01-08 Fa. Emil Adolff, 7410 Reutlingen Huelse als garn- oder fadentraeger

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan, Vol.8, No.54 [M-282] 10/03/1984 & JP-A-57 89816 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013003340A3 (en) * 2011-06-29 2013-03-14 Invista Technologies S.A R.L. Tube core for humid environment

Also Published As

Publication number Publication date
DE69214379D1 (de) 1996-11-14
IT1252919B (it) 1995-07-05
ITBO910302A0 (it) 1991-08-02
ATE143910T1 (de) 1996-10-15
ITBO910302A1 (it) 1993-02-02
ES2095365T3 (es) 1997-02-16
DE69214379T2 (de) 1997-03-06
EP0525796A1 (en) 1993-02-03

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