NZ613517B2 - Fold-resistance reducing mechanism - Google Patents
Fold-resistance reducing mechanism Download PDFInfo
- Publication number
- NZ613517B2 NZ613517B2 NZ613517A NZ61351712A NZ613517B2 NZ 613517 B2 NZ613517 B2 NZ 613517B2 NZ 613517 A NZ613517 A NZ 613517A NZ 61351712 A NZ61351712 A NZ 61351712A NZ 613517 B2 NZ613517 B2 NZ 613517B2
- Authority
- NZ
- New Zealand
- Prior art keywords
- sheet
- fold
- line
- folding
- location
- Prior art date
Links
- 239000000463 material Substances 0.000 abstract description 27
- 239000011087 paperboard Substances 0.000 abstract description 8
- 238000004806 packaging method and process Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 2
- 230000001070 adhesive Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002365 multiple layer Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
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
- B65D2571/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans, pop bottles; Bales of material
- B65D2571/00123—Bundling wrappers or trays
- B65D2571/00129—Wrapper locking means
- B65D2571/00135—Wrapper locking means integral with the wrapper
- B65D2571/00141—Wrapper locking means integral with the wrapper glued
-
- 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
- B65D2571/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans, pop bottles; Bales of material
- B65D2571/00123—Bundling wrappers or trays
- B65D2571/00432—Handles or suspending means
- B65D2571/00438—Holes
- B65D2571/0045—Holes for hands
-
- 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
- B65D2571/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans, pop bottles; Bales of material
- B65D2571/00123—Bundling wrappers or trays
- B65D2571/00555—Wrapper opening devices
- B65D2571/00561—Lines of weakness
- B65D2571/00574—Lines of weakness whereby contents can still be carried after the line has been torn
-
- 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
- B65D2571/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans, pop bottles; Bales of material
- B65D2571/00123—Bundling wrappers or trays
- B65D2571/00648—Elements used to form the wrapper
- B65D2571/00654—Blanks
- B65D2571/0066—Blanks formed from one single sheet
-
- 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
- B65D2571/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans, pop bottles; Bales of material
- B65D2571/00123—Bundling wrappers or trays
- B65D2571/00709—Shape of the formed wrapper, i.e. shape of each formed element if the wrapper is made from more than one element
- B65D2571/00722—Shape of the formed wrapper, i.e. shape of each formed element if the wrapper is made from more than one element tubular with end walls, e.g. walls not extending on the whole end surface
- B65D2571/00728—Shape of the formed wrapper, i.e. shape of each formed element if the wrapper is made from more than one element tubular with end walls, e.g. walls not extending on the whole end surface the end walls being closed by gluing
-
- 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
- B65D2571/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans, pop bottles; Bales of material
- B65D2571/00123—Bundling wrappers or trays
- B65D2571/00833—Other details of wrappers
-
- 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
- B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
- B65D5/42—Details of containers or of foldable or erectable container blanks
- B65D5/4266—Folding lines, score lines, crease lines
-
- 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
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/02—Wrappers or flexible covers
- B65D65/10—Wrappers or flexible covers rectangular
- B65D65/12—Wrappers or flexible covers rectangular formed with crease lines to facilitate folding
Abstract
sheet of foldable material such as paperboard with a folding mechanism to reduce the resistance of a material to folding. The sheet has a folding mechanism (46b) that is positioned to facilitate folding of the sheet into two parts. The folding mechanism includes two weakened lines (60,62) that diverge from a first location on the sheet and that converge on a second location on the sheet. The first and second locations are spaced apart and are positioned on a notional line defining a primary hinging line between the two parts of the sheet. The two weakened lines are of an arcuate or curved shaped. erge from a first location on the sheet and that converge on a second location on the sheet. The first and second locations are spaced apart and are positioned on a notional line defining a primary hinging line between the two parts of the sheet. The two weakened lines are of an arcuate or curved shaped.
Description
FOLD-RESISTANCE REDUCING MECHANISM
CROSS REFERENCE
This application claims the benefit of U.S. Provisional Application No. 61/441,240, filed February
9, 2011, which is incorporated herein by reference in their entirety.
FIELD OF THE INVENTION
The present invention relates to the folding of sheet material, such as paperboard. More
specifically the invention relates to reducing the resistance of a material to folding. A fold
resistance-reducing mechanism is provided by the present invention that can be used in single-
ply or multiple-ply arrangements.
BACKGROUND OF THE INVENTION
In the field of packaging, paperboard, fibreboard and other foldable sheet materials are used.
Folded sheet material can be constructed into a huge variety of configurations to create
packages for products. Typically, the sheet material is cut, pre-creased or scored, folded and
then glued to form a flat folded part formed blank; these blanks are then fed into machines for
automated assembly, loading of articles and completion. During the packaging process it is
often necessary for multiple layers of material to be folded together or for thick sheet material
to be folded. Sheet material has a resistance to being folded and a natural resilience that causes
the material to want to “springback” into its unfolded state. To create a fold, a folding force of
sufficient strength must be applied to the material. To maintain a folded state a maintaining
force must be applied.
A guide on a packaging machine is often used to create a fold and to maintain the folded state
of the material. For example, a paperboard carton for holding bottles may be assembled into an
5643111_3.doc
open ended form, loaded from one or both ends with bottles and then end closure flaps folded
by a guide to part form an end wall. The guide is used to fold the end flaps and to maintain the
end flaps in their folded state. Adhesive is applied to them and other end flaps are then folded
and adhered to that first folded end flap to create a finished composite end wall. If the
resistance of the material to folding is high and/or if the tendency of the material to return to
its unfolded state (its “springback”) is strong, the guide may not be able to create the fold
and/or may not be able to maintain the folded state of the material. In such a situation an end
flap may be mis-positioned or kicked-back the wrong way. The resulting carton is not a properly
finished carton and is rejected.
The problem of addressing a material’s fold resistance can occur in a number of situations, one
common situation is in the packaging of heavy loads, for example 12 or 24 bottle packs that are
provided with handles. Because the package contents are heavy, the handle needs to be strong.
To form a strong handle, multiple-plies of material are used to provide a reinforcement. This
can result in the folding of multiple plies of material around a common corner. In such
arrangements the fold-resistance is often high. Mechanisms to reduce the fold-resistance
and/or avoid bunching of the material in the corner region are already available. For example,
in US 6968992, an insert (see Figure 4) is provided to reinforce the carton. Apertures (184) are
provided along fold lines (182A and 182B) to facilitate the folding of the fold lines (182A and
182B) without the bunching of the paperboard. Similarly in US5072876 to Wilson cut-out
portions (72) are provided along a fold line (56) to facilitate folding an end panel flap (58).
The present invention seeks to provide an improvement in technologies where folded material
is used, specifically but not exclusively in the field of packaging and even more specifically, but
not exclusively in the field of paperboard packaging, by providing a mechanism and method of
reducing a material’s resistance to folding, and/or to at least provide the public with a useful
choice.
5643111_3.doc
SUMMARY OF INVENTION
According to a first aspect, the invention provides a sheet of foldable material comprising a
folding mechanism, the folding mechanism positioned to facilitate folding of the sheet into two
parts, the folding mechanism comprising two fold lines that diverge from a first location on the
sheet and that converge on a second location on the sheet, the first and second locations being
spaced apart and being positioned on a notional line defining a primary hinging line between
the two parts of the sheet , each of the fold lines being formed in the sheet such that an
enclosed area of the sheet is defined by the two fold lines, the maximum distance between the
two fold lines being greater than the width of each fold line, wherein the two fold lines are
arcuate in shape.
The term ‘comprising’ as used in this specification and claims means ‘consisting at least in part
of’. When interpreting statements in this specification and claims which include the term
‘comprising’, other features besides the features prefaced by this term in each statement can
also be present. Related terms such as ‘comprise’ and ‘comprised’ are to be interpreted in a
similar manner.
Preferably, the first and second locations are positioned on opposite edges of the sheet.
Preferably, the two weakened lines are arcuate in shape and have a similar radius and have a
similar maximum width as measured from said notional line. Alternatively, the two weakened
lines are arcuate in shape and have a different radius and have a different maximum width as
measured from said notional line and/or each arcuate line has a peak which is not positioned
immediately opposite to the peak of the other arcuate line.
Preferably, the folding mechanism further comprises a weakened aspect at least in part
extending between the two weakened lines. Optionally, the weakened aspect comprises an
embossed region between the two weakened lines and/or the weakened aspect comprises one
or more weakened lines positioned in parallel to said notional line.
5643111_3.doc
Preferably, when present, the one or more weakened lines positioned in parallel to said
notional line are formed by one or more, or a combination of: a full depth cut and crease line, a
half depth cut and crease line, a score line, an embossed line, a perforation and a fold line.
Even more preferably, the one or more weakened lines positioned in parallel to said notional
line consists of two weakened lines, a first of said weakened lines is a half depth cut and crease
line with each half-depth cut and crease having a length of about 0.13 inches (about 0.32cm)
and wherein the second of said weakened lines is a half depth cut and crease line with each
half-depth cut and crease having a length of about 0.25 inches (about 0.64cm). Even more
preferably said one or more weakened lines positioned in parallel to said notional line have
about 80% or more of their length positioned within the area defined by the two weakened
lines.
Optionally, the two weakened lines are formed by one or more or a combination of: a full
depth cut and crease line, a half depth cut and crease line, an embossed line, a score line, a
perforation and a fold line and preferably, said two weakened lines are each a half depth cut
and crease line with each half-depth cut and crease having a length of about 0.13 inches (about
0.32cm).
Preferably, the folding mechanism further comprises one or more linear hinge lines extending
between the first location and an edge of the sheet of material.
Preferably, the sheet of foldable material comprises more than one folding mechanism and at
least one of the folding mechanisms further comprises a linear hinge line extending between
the first location of that folding mechanism and the second location of the other folding
mechanism.
According to a second aspect, the invention provides a blank for forming a carton, the blank
formed from a sheet of foldable material according to the first aspect.
According to a second aspect, the invention provides a carton comprising a sheet of foldable
material according to the first aspect.
5643111_3.doc
BRIEF DESCRIPTION OF THE DRAWINGS
Exemplary embodiments of the invention will now be described with reference to the
accompanying drawings, in which:
FIGURE 1. is a plan view of a sheet of paperboard, cut and scored to form a blank for
forming a carton, having a mechanism of reducing the paperboard’s resistance to being folded
according to a first embodiment of the invention;
FIGURE 2. is a perspective view from the top, side and front end of a carton formed from
the blank of Figure 1;
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201161441240P | 2011-02-09 | 2011-02-09 | |
US61/441,240 | 2011-02-09 | ||
PCT/US2012/023711 WO2012109096A1 (en) | 2011-02-09 | 2012-02-03 | Fold-resistance reducing mechanism |
Publications (2)
Publication Number | Publication Date |
---|---|
NZ613517A NZ613517A (en) | 2016-01-29 |
NZ613517B2 true NZ613517B2 (en) | 2016-05-03 |
Family
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