Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
  • B65D85/66—Containers, packaging elements or packages, specially adapted for particular articles or materials for jumbo rolls; for rolls of floor covering
• • 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
• • 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
  • B65H2701/50—Storage means for webs, tapes, or filamentary material
  • B65H2701/53—Adaptations of cores or reels for special purposes
  • B65H2701/532—Tearable or frangible cores or reels

Definitions

• the present invention relates to a protective board forming part of a packing for cylindrical rolls of wound webs of material, especially paper webs, the packing com ⁇ prising a sheet- or web-shaped wrapping to be arranged round the circumferential surface of the roll, and said protective board which is adapted to be arranged on at least one of the two opposite end surfaces of the roll in order to absorb blows and impacts and reduce the risk of deforming the web of material, for instance when placing the roll end surface on a rough or uneven surface.
• the finished web of material is generally wound onto a tubular core of e.g. board and is thus shaped as a cylindrical roll containing a considerable amount of web.
• each roll may vary within wide limits; for example in case of paper rolls, the roll generally has a length of 1-2 m and a diameter of 1-1.5 m, and the weight may vary between about 1.5 and 5 tonnes.
• each roll is of great economic value, and it is therefore important to try to protect the rolls as much as possible during storage and transport to the consumers. It is particularly important to protect the end surfaces of the rolls since even rela ⁇ tively limited damage to the end surfaces may necessitate discarding large amounts of paper, perhaps even the entire roll, owing to the lateral edges of the web being damaged, which in turn results in the web not fitting into subse ⁇ quent processing machines, e.g. a printing machine, or being torn therein.
• the packing after being removed by the receiver, can be burnt in local solid fuel furnaces to make it possible to recover the calorific value of the packing and avoid any costs of dis ⁇ posal.
• the protective boards must be divided into small pieces to be supplied to the furnaces, which, at least for comparatively rigid protective boards, can only be effected with great difficulty.
• burning of board and other products having long fibres, such as paper and cardboard should preferably be recycled, thereby contributing to the supply of raw material. Such recycling involves great expenses, and the costs are generally higher than the payment for the recycled material.
• the inventive protective board should efficiently be able to protect the end surfaces of rolls of wound webs of material, on the one hand against blows and impacts and, on the other hand, against pressing-in when the rolls are placed on an uneven surface.
• one object of the invention is to provide a protective board which after use, for transport and storage, and removal at the consumer's place can be directly disposed of or, preferably, be burnt, without the national laws which exist in many countries and which stipulate that products containing a certain minimum amount of long fibres of a given minimum length are not allowed to be destroyed or burnt, but that the products must be reused or the fibres be recovered.
• one object of the invention is to provide such protective boards which are so inexpensive to manufacture that they may be disposed of or burnt without any real loss, i.e. the manufacturing cost should be lower than the cost of hand ⁇ ling and returning the boards to the supplier. At least these main objects are achieved by means of a protective board according to the characterising clause of claim 1.
• a further object of the invention is to facilitate the dividing of the protective board into small pieces after removal of the packing. This object is achieved by means of a protective board according to any one of claims 3-7. Further description of the Prior Art
• US 3,669,255 discloses the use of thick protective boards of various materials to protect the end surfaces of rolls, mentioning materials such as wood, composite card- board, foamed plastic, metal and cermets.
• the first object of the invention can of course be achieved by means of all the materials enumerated if the protective boards are made sufficiently thick.
• the second object of the invention cannot be achieved by means of protective boards of wood, composite cardboard or cardboard of recycled newsprint since these materials con ⁇ tain too large amounts of long fibres. Both because of the expense and for environmental reasons, none of the other materials is suited for disposable packings which are disposed of or burnt after use.
• this cannot be achieved by means of pro ⁇ tective boards of any of the materials mentioned in the US patent specification and having the thicknesses which are necessary to prevent pressing-in of the end surface of a roll when placed on a small stone or the like.
• Fig. 1 is a perspective view of a roll of paper and the associated packing
• Fig. 2 is a perspective view of one end surface of the roll of paper, the packing being attached
• Fig. 3 is a top plan view of a preferred embodiment of the inventive protective board
• Fig. 4 shows the protective board in Fig. 3 divided into pieces
• Fig. 5 is a cross-sectional view of the protective board in Fig. 3.
• Fig. 1 illustrates a paper roll 1 which comprises a web of paper wound on a central tubular core 2 of e.g. board, and a packing consisting of a paper wrapping 3 for protecting the circumferential surface of the roll, and two protective boards 4, 4' for protecting the end surfaces of the roll.
• the figure is merely schematic, and as a rule use is made of a wrapping 3 of essentially greater length to permit winding a number of turns round the roll of paper.
• the wrapping has been wound on the roll of paper and fixed, for example by gluing, the wrapping is in the form of a tube extending a distance beyond the end surfaces of the roll of paper.
• a protective board is inserted in this tube from each end so as to engage with the end surfaces of the roll of paper, and the end portions of the wrapping are folded and each fixed to one of the protective boards, as illustrated in Fig. 2, the wrapping thereby ensuring that the protective boards are kept in engagement with the end surfaces of the roll of paper.
• a fur ⁇ ther protective layer in the form of a paper wrapping provided with e.g. the manufacturer's trademarks and de ⁇ scriptions of quality, can be attached to the end surfaces on the outside of the packing, thereby covering the protec- tive boards and the folded wrapping.
• the protective board 4, 4' is made of a per se known porous or medium hard fibreboard having a density in the range of 100-750 kg/m 3 and a thick ⁇ ness of 5-12 mm.
• the density amounts to 150-350 Kg/m 3 and the thickness to 5-8 mm.
• Such fibreboards are made by short wood fibres, which are suitably obtained from sawdust which is heated or boiled in water and ground so as to release the individual fibres, being mixed with long wood fibres which may derive from e.g. waste paper or papermaking pulp, and water to a stock or pulp.
• the amount of short fibres in relation to long fibres preferably is in the range of 70-90%, suitably 75-85%, and thus constitutes the main ingredient of the finished fibreboard.
• the long fibres serve as reinforcement and contribute to holding the material of the board to ⁇ gether and make the board stronger.
• some sort of binding agent is general ⁇ ly added to the pulp, e.g. rosin size.
• the actual forming of the boards is done by collecting the pulp on a wire and pressing it during simultaneous drainage between a pair or a number of pairs of press rolls. The degree of compressing the pulp determines the density of the finished boards. After forming, the web is dried and cut to boards of any desired size.
• a fibreboard manufactured as described above and having the composition and dimension as stated has a plurality of important properties which make it suitable for use as protective board for rolls of paper or other web-shaped materials according to the present invention. Since the main ingredient of the fibreboard is short fibres which can be obtained from sawdust, which normally is a waste material without any particular commercial value and which normally is disposed of or burnt, the boards are inexpensive to manufacture and, regarding the price, they are on a level with the corresponding protective pieces of board or cardboard.
• the protective board is formed with fracture lines in the form of shallow grooves 5 on one side of the board.
• the grooves are oriented in parallel with each other, and preferably the distance between two neighbouring grooves is 10-30 cm, or suitably about 20 cm.
• the grooves are preferably 5-15 mm wide and of a depth corresponding to approximately half the thickness of the board, preferably in the range of 35-65% of the thickness of the board.
• Fig. 4 illustrates how a protective board of the type shown in Figs 3 and 5 has, after use, been broken along the grooves into relatively long and narrow pieces which may easily be burnt in a solid fuel furnace.
• the possibility of manually dividing the protective boards in a simple manner along the grooves serving as fracture lines is, of course, advantageous not only when the boards should be burnt in a solid fuel furnace.
• the large protective boards which as mentioned above may have a dia ⁇ meter of 1-1.5 m and in some cases even greater, into elon- gate pieces, it is possible to supply them to a disinteg ⁇ rating machine, for instance a cutting machine or a mill, so as to further disintegrate the material and, for in ⁇ stance, burn it in a furnace intended for sawdust or chips.
• a disinteg ⁇ rating machine for instance a cutting machine or a mill
• the preferred embodiment of the protective board according to the present invention is formed with fracture-indicating grooves on one side, it is, of course, quite possible to form fracture lines in some other op ⁇ tional manner, for example as perforations, i.e.
• the boards can be manufactured in other ways than by the wet-forming process described above, e.g. by a dry-forming process in which the fibre material is distributed over a moving web together with a binding agent and is hardened during simultaneous compressing and supply of heat.
• the wrapping need not be made of precise ⁇ ly paper, but any other flexible sheet- or web-shaped mate ⁇ rial may be used.
• plastic can be wound round the roll in the axial direction thereof.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Buffer Packaging (AREA)
• Storage Of Web-Like Or Filamentary Materials (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20387603

Family Applications (1)

Country Status (7)

Cited By (3)

Citations (6)

• 1992
  • 1992-10-28 SE SE9203170A patent/SE500816C2/sv not_active IP Right Cessation
• 1993
  • 1993-10-28 CA CA 2148123 patent/CA2148123A1/en not_active Abandoned
  • 1993-10-28 WO PCT/SE1993/000894 patent/WO1994010066A1/en not_active Application Discontinuation
  • 1993-10-28 AU AU54015/94A patent/AU5401594A/en not_active Abandoned
  • 1993-10-28 EP EP93924272A patent/EP0666825A1/en not_active Withdrawn
• 1995
  • 1995-04-27 FI FI952016A patent/FI952016A/fi not_active IP Right Cessation
  • 1995-04-28 NO NO951625A patent/NO951625L/no unknown

Patent Citations (6)

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