EP3473560A1 - Schnappdeckel - Google Patents
Schnappdeckel Download PDFInfo
- Publication number
- EP3473560A1 EP3473560A1 EP18170008.9A EP18170008A EP3473560A1 EP 3473560 A1 EP3473560 A1 EP 3473560A1 EP 18170008 A EP18170008 A EP 18170008A EP 3473560 A1 EP3473560 A1 EP 3473560A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lid
- membrane
- rim
- receptacle
- side wall
- 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.)
- Granted
Links
- 239000000835 fiber Substances 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 21
- 239000012528 membrane Substances 0.000 claims description 95
- 239000000123 paper Substances 0.000 claims description 31
- 238000004806 packaging method and process Methods 0.000 claims description 15
- 239000011101 paper laminate Substances 0.000 claims description 10
- 239000004033 plastic Substances 0.000 description 17
- 229920003023 plastic Polymers 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000003860 storage Methods 0.000 description 8
- 235000013305 food Nutrition 0.000 description 5
- 235000013361 beverage Nutrition 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229920001131 Pulp (paper) Polymers 0.000 description 3
- 239000011324 bead Substances 0.000 description 3
- 241001122767 Theaceae Species 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 235000021056 liquid food Nutrition 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012536 packaging technology Methods 0.000 description 2
- 235000021057 semi-liquid food Nutrition 0.000 description 2
- 235000014214 soft drink Nutrition 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000533950 Leucojum Species 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011111 cardboard Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 235000013410 fast food Nutrition 0.000 description 1
- 230000009975 flexible effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 235000015243 ice cream Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 235000015504 ready meals Nutrition 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 235000021055 solid food Nutrition 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
Images
Classifications
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- 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
- B65D51/00—Closures not otherwise provided for
- B65D51/18—Arrangements of closures with protective outer cap-like covers or of two or more co-operating closures
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B65D51/00—Closures not otherwise provided for
- B65D51/18—Arrangements of closures with protective outer cap-like covers or of two or more co-operating closures
- B65D51/20—Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
- B65D77/10—Container closures formed after filling
- B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
- B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
- B65D77/2028—Means for opening the cover other than, or in addition to, a pull tab
- B65D77/2032—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
- B65D77/2044—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure
- B65D77/2048—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut
- B65D77/2056—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut the cover being weakened
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B65D2251/0003—Two or more closures
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- B65D2543/00092—Shape of the outer periphery curved circular
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- B65D2543/00444—Contact between the container and the lid
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- B65D2543/0049—Contact between the container and the lid on the inside or the outside of the container on the inside, or a part turned to the inside of the mouth of the container
- B65D2543/00527—NO contact
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- B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
- B65D2543/00537—Contact between the container and the lid on the inside or the outside of the container on the outside, or a part turned to the outside of the mouth of the container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
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- B65D2543/00601—Snapping means on the container
- B65D2543/00611—Profiles
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- B65D2543/00—Lids or covers essentially for box-like containers
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- B65D2543/00722—Profiles
- B65D2543/00731—Groove or hollow bead
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B65D2543/00787—Periphery concerned
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Definitions
- the present disclosure relates to packages and packaging technology, and in particular to so called snap-on or clip-on lids for cup-shaped receptacles.
- fibre based packaging materials are widely used for both packaging and serving both solid, semi-liquid and liquid foods. Examples include, but are not limited to cup-shaped and tray-shaped receptacles with removable lids.
- An illustrative example is the paper cup used for serving various beverages, such as coffee, tea and soft drinks. Such cups are frequently closed with a plastic snap-on lid, having an opening through which the beverage can be consumed, eigher directly or through a straw.
- Other examples are found in the convenience food sector, where for example ready meals are served on a fibre-based tray suitable for heating, and covered by a removable plastic lid.
- US 4,589,569 discloses a thermoformed plastic snap-on lid for a drinking cup, having a mounting portion including a resilent annular gripping portion, configured to grip the bead on the lip of the cup and seal thereagainst.
- a thermoformed plastic snap-on lid for a drinking cup having a mounting portion including a resilent annular gripping portion, configured to grip the bead on the lip of the cup and seal thereagainst.
- Such lids as disclosed in US 4,589,569 and similar constructions have become widely used.
- European patents 1 367 001 B1 and 2 159 161 B1 disclose an improved plastic clip-on (snap-on) lid especially for a cup-shaped paper or cardboard receptacle having an outwardly projecting bead, especially a curled rim, wherein said lid is formed with a peripheral clamping groove which is open on the lower surface of the lid for receiving therein the bead of said receptacle.
- lids are easily attached and provide a tight seal, and have become popular in the packaging of food and beverages, not only for take-away coffee, tea and soft drinks, although this remains the main use.
- the lids are made of food grade plastics, most frequently polypropylene. Billions of coffee cup lids are used every year, and it is estimated that only a small percentage of them are recycled. Therefore it is desirable to minimize or entirely avoid the use of plastic snap-on lids.
- WO 2015/189130 discloses a new type of paper laminate having stretchable outer layers and an intermediate layer of less stretchability.
- the intermediate layer is designed to at least partly break when the new laminate is provided with folding lines, while the outer layers are designed to stretch and thus hold the laminate together at the folding lines.
- the stretchable outer layers allow formation of reliefs in the laminate, e.g. by embossing, such that it can compete with plastics.
- Fig. 3 of WO 2015/189130 shows a lid, comprising two pairs of opposing side walls and an upper wall, formed in a paper laminate wherein the top portion comprises a bulge or relief formed by stretching a portion of the paper laminate.
- WO 2015/189130 does not address how a lid for a receptacle, e.g. a cup-shaped or tray-shaped receptacle should be formed to allow a releasable attachment and at the same time creating a tight seal.
- the present disclosure aims at solving problems associated with the use of non-renewable plastic snap-on lids, and to replace the plastic with a renewable, fibre based lid while maintaining or improving the functions associated with plastic lids.
- Other problems and solutions may be identified upon a closer study of the present disclosure.
- the present description makes available a snap-on lid 10, 100 for a receptacle 2, 200 having an opening surrounded by a rim 3, 300 wherein said lid 10, 100 has a top portion and a side wall 12, 112 extending from said top portion, wherein said lid 10, 100 is made of a fibre based material and has a distal portion of said side wall which is folded inwards, forming an edge or lip 20, 120 for engaging with said rim 3, 300 removably locking or holding the lid 10, 100 in place on said receptacle 2, 200 when in use.
- said side wall 12, 112 has a circumferential recess 130 for engaging with said rim 3, 300.
- the side wall 12, 112 has an upper circumference proximal to the top portion of the lid 10, 100, and a lower circumference distal to the top portion of the lid 10, 100, wherein the lower circumference is larger than the upper circumference.
- the lid has the shape of a truncated cone, making it possbly to stack the lids during manufacture, transport and storage.
- the present description makes available snap-on lid 10, 100 for a receptacle 2, 200 having an opening surrounded by a rim 3, 300, and a membrane 40 affixed to said opening, wherein the area of said membrane 40 is larger than that of said opening, said membrane 40 extending outward over the rim 3, 300 of said opening, wherein said lid 10, 100 has a top portion and a side wall 12, 112 extending from said top portion, wherein said lid 10, 100 is made of a fibre based material, and in that a distal edge of said side wall 12, 112 is folded inwards, forming an edge or inward lip 20, 120 for engaging at least one of said rim 3, 300 and said membrane 40 to removably hold the lid in place on said receptacle 2, 200 when in use.
- said edge or lip 20, 120 engages said membrane 40 to removably hold the lid 10, 100 in place.
- said edge or lip 130 engages both said rim 3, 300 and said membrane 40 to removably hold the lid 10, 100 in place.
- the side wall 12, 112 has an upper circumference proximal to the top portion of the lid 10, 100, and a lower circumference distal to the top portion of the lid 10, 100, wherein the lower circumference is larger than the upper circumference.
- the present description makes available a receptacle 2, 200 having an opening surrounded by a rim 3, 300, and a membrane 40 affixed to said opening, wherein the area of said membrane 40 is larger than that of said opening and said membrane 40 projects outward over the rim 3, 300 of said opening, wherein said membrane 40 extends at least partially over the rim 3, 300 capable of forming a skirt 41 having a substantially circumferential edge positioned at or below said rim 3 , 300 when a lid 10 , 100 is attached to said receptacle.
- said membrane 40 has an openable portion 50 , which when open provides access to the inside of said receptacle 2 , 200 without removal of the entire membrane 40.
- said lid 10, 100 has a top portion and a side wall 12, 112 extending from said top portion, wherein said lid is made of a fibre based material, and wherein a distal edge of said side wall is folded inwards, forming an edge or lip 20, 120 for engaging with said membrane 40, preferably also for engaging with an edge of the skirt 41 which is formed when the lid is placed in position on said receptacle.
- said lid 10, 100 has a top portion and a side wall 12, 112 extending from said top portion, wherein said lid is made of a fibre based material, and wherein a distal edge of said side wall is folded inwards, forming an edge or lip 20, 120 for engaging with said membrane 40, and wherein said side wall has a circumferential recess 130 for engaging with said rim 3, 300 and optionally with said membrane 40.
- the lip 20, 120 and/or recess 130 is/are preferably also engaging with the edge of a skirt 41 formed by the membrane 40 when the lid is placed in position on said receptacle.
- the desription also discloses a snap-on lid according to any one of the above aspects and embodiments, made substantially of a paper laminate comprising at least a first stretchable paper layer and a second stretchable paper layer, wherein the first and the second stretchable paper layer preferably have a stretchability (ISO 1924/3) of at least 5 % in both the machine direction (MD) and the cross direction (CD).
- the stretchability is at least 10 % in both the MD and CD, more preferably at least about 15 % the MD and at least about 10 % in the CD.
- the laminate preferably also comprises an intermediate paper layer arranged between the first and the second stretchable paper layer, wherein the stretchability (ISO 1924/3) of said intermediate paper layer is less than 3 % in the MD and/or the CD.
- the description further makes available a snap-on lid according to any one of the aspects and embodiments herein, further comprising an embossed shape or pattern 70 in the top portion of said lid.
- the description also makes available a packaging comprising a lid according to any one of the aspects and embodiments.
- description also makes available a packaging comprising a receptacle having a membrane and a lid according to any one of the above aspects and embodiments.
- the description also concerns a method for closing a receptacle having an opening surrounded by a rim 3, 300 using a lid 10, 100 according to any one of the aspects and embodiments above.
- the present description makes available a snap-on lid 10, 100 for a receptacle 2 , 200 having an opening surrounded by a rim 3, 300 wherein said lid 10, 100 has a top portion and a side wall 12, 112 extending from said top portion, wherein said lid is made of a fibre based material and has a distal portion of said side wall which is folded inwards, forming an inward lip 20 for engaging with said rim 3, 300 removably holding the lid 10, 100 in place on said receptacle 2, 200 when in use.
- the expression "folded inwards" as used in the different aspects and embodiments, and thus freely combinable with any one of them, is used to describe how the fiber based material forming the side wall 12, 112 of a lid 10, 100 is folded about 180° towards the interior of the lid, forming a double-walled portion of the side wall.
- This double walled portion is however shorter than the total height of the side wall, in other words, it does not extend all the way to the top of the lid.
- the side wall is therefore thicker at the lower end thereof, and above the double-walled portion and the top of the lid, a space is formed, suitable for receiving and releasably holding a rim 3, 300 of a receptacle 2, 200.
- the inward folded part of the side wall both reinforces the lower part of the side wall, and creates the above mentioned space for receiving a rim of a receptacle.
- the upper edge of the folded material forms a shelf or abutment for engaging with a rim and/or a membrane of a receptacle, and releasably holding the lid in place on said receptacle. It is possible to vary the height of the double-walled portion as well as the finish of the edge.
- the space for receiving a rim can be made smaller or larger, thus influencing the thightness of the fit of the lid to the receptable. A sharp edge will also provide a stronger hold, in particular in combination with a membrane.
- the inward folded, double-walled portion of the side wall extends for about half the height of the side wall, prefereably ending about 3 mm below the top of the lid, forming the space for receiving a rim of a receptacle.
- the diameter of this rim is usually 3 mm +/- 0.25 mm.
- the space for receiving a rim of a receptacle should be at least 3 mm, meaning that the double-walled portion of the side wall ends at least 3 mm below the top of the lid.
- the space for receiving the rim is adapted to the height of said rim.
- said side wall 12, 112 also has a circumferential recess 130 for engaging with said rim 3, 300.
- This recess is preferably substantially semicircular in cross-section, having a radius of about 3 mm.
- the double-walled portion can extend into about half the height of said circumferential recess (as shown e.g. in Figs. 4, 6 , 8, 10 ) or end at or below said circumferential recess (not shown).
- the lid When extending into about half the height of said circumferential recess, the lid can receive and releasably hold both receptacles having a rolled rim 3 and receptacles having a straight, non-rolled rim 300, which is an advantage of this embodiment.
- the side wall 12, 112 has an upper circumference proximal to the top portion of the lid 10, 100, and a lower circumference distal to the top portion of the lid 10, 100, wherein the lower circumference is larger than the upper circumference.
- the lid 10, 100 has the shape of a truncated cone, making it possbly to stack the lids during manufacture, transport and storage.
- the present description makes available snap-on lid 10 , 100 for a receptacle 2 , 200 having an opening surrounded by a rim 3, 300, and a membrane 40 affixed to said opening, wherein the area of said membrane 40 is larger than that of said opening, said membrane 40 extending outward over the rim 3 , 300 of said opening, wherein said lid 10 , 100 has a top portion and a side wall 12 , 112 extending from said top portion, wherein said lid 10 , 100 is made of a fibre based material, and in that a distal edge of said side wall is folded inwards, forming an inward lip 20, 120 for engaging at least one of said rim 3, 300 and said membrane 40 to removably lock or hold the lid in place on said receptacle 2, 200 when in use.
- said inward lip 20, 120 engages said membrane 40 to removably lock or hold the lid in place.
- said inward lip 20, 120 engages both said rim 3, 300 and said membrane 40, preferably an overhang or skirt 41 formed by said membrane, to removably lock or hold the lid in place.
- the side wall 12, 112 has an upper circumference proximal to the top portion of the lid 10, 100, and a lower circumference distal to the top portion of the lid, wherein the lower circumference is larger than the upper circumference.
- the present description makes available a receptacle 2 , 200 having an opening surrounded by a rim 3, 300, and a membrane 40 affixed to said opening, wherein the area of said membrane 40 is larger than that of said opening and said membrane 40 projects outward over the rim 3, 300 of said opening, wherein said membrane 40 extends at least partially over the rim 3, 300 forming a an overhang or skirt 41 having a substantially circumferential edge positioned at or below said rim 3, 300.
- Membranes for sealing receptacles are well known in the art, and can be made of metal foil, plastic foil, paper, or laminates of two or more of the materials metal, plastic and paper.
- a membrane can be glued, heat sealed or welded to the rim of the receptacle.
- an overhang is formed.
- this overhang is pressed down at least partially over the rim 3, pinched between the rim 3 and the lid snap-on lid 10, 100. This improves the attachment of the lid to the receptacle, which is an advantage of this embodiment.
- the combination of a membrane and a lid has other advantages.
- a membrane which is glued or heat sealed to a receptacle create thight seal, and can be used to seal liquid or semi-liquid foods and protect them from the environment.
- a membrane can however be punctured or torn durign the transport and handling of the packages, for example when the packages are stacked in the shop, or when transported by the end-user from the shop to the home.
- a fibre based snap-on lid offers a mechanical protection for the membrane.
- said membrane 40 has an openable portion 50, which when open provides access to the inside of said receptacle without removal the entire membrane 40.
- This can be formed as a tab 60, where a portion of the membrane is delimited by indented lines, perforations or similar.
- the membrane can be removed totally or in part, the contents accessed and the receptacle closed again, using the fibre based snap-on lid 10, 100.
- said lid 10, 100 has a top portion and a side wall 12, 112 extending from said top portion, wherein said lid is made of a fibre based material, and wherein a distal edge of said side wall is folded inwards, forming an inward lip 20 , 120 for engaging with said membrane 40 , preferably also for engaging with the edge of said skirt 41 which is formed when the lid is placed in position on said receptacle.
- said lid 10 , 100 has a top portion and a side wall 12 , 112 extending from said top portion, wherein said lid is made of a fibre based material, and wherein a distal edge of said side wall is folded inwards, forming an inward lip 20 , 120 for engaging with said membrane 40 , and wherein said side wall also has a circumferential recess 130 for engaging with said rim 3 , 300 and optionally with said membrane 40.
- the lip 20 , 120 and/or recess 130 preferably also engage with the edge of a skirt 41 formed by the membrane 40 when the lid is placed in position on said receptacle.
- the description also discloses a snap-on lid according to any one of the above aspects and embodiments, made substantially of a paper laminate comprising a first stretchable paper layer and a second stretchable paper layer, wherein the first and the second stretchable paper layer preferably have a stretchability (ISO 1924/3) of at least 5 % in both the machine direction (MD) and the cross direction (CD)
- the laminate also comprises an intermediate paper layer arranged between the first and the second stretchable paper layer, wherein the stretchability (ISO 1924/3) of the intermediate paper layer is less than 3 % in the MD and/or the CD.
- the stretchability of the first and the second stretchable paper layer is at least 6 or 7 % in both the MD and the CD, more preferably at least 10 %.
- the stretchability of the first and the second stretchable paper layer is at least 10 % in both the MD and the CD, more preferably at least about 15 % the MD and at least about 10 % in the CD.
- the density (ISO 534) of the intermediate paper layer is less than 0.8 g/cm 3 .
- the grammage (ISO 536) of the intermediate paper layer is between 75 and 500 g/m 2 , such as between 100 and 400 g/m 2 , such as between 150 and 350 g/m 2 .
- FibreForm® the trademark is property of BillerudKorsnäs, Sweden.
- An account of the manufacture and the proprties of FibreForm® is given in WO 2015/189130 the contents of which is incorporated herein by reference.
- Different qualities can be used, for example different grammage (ISO 536) such as 80, 100, 150, 200, 250, and 300 g/m 2 and combinations thereof.
- the intermediate layer is at least partly formed from pulp comprising mechanical pulp, thermomechanical pulp (TMP) or chemithermomechanical pulp (CTMP).
- TMP thermomechanical pulp
- CMP chemithermomechanical pulp
- the internal bond strength (TAPPI 569) the first and the second stretchable paper layer is at least 400 J/m 2 , such as at least 500 J/m 2 , such as at least 600 J/m 2 .
- the paper laminate has a thickness (ISO 534) of about 200 to about 800 ⁇ m, preferably 220 - 520 ⁇ m and/or a grammage (ISO 536) of about 50 to about 700 g/m 2 , preferably 80 - 400 g/m 2 .
- the paper laminate has a thickness (ISO 534) of 380 ⁇ m and/or a grammage (ISO 536) of about 300 g/m 2 .
- the description also makes available a packaging comprising a lid according to any one of the aspects and embodiments.
- description also makes available a packaging comprising a receptacle having a membrane and a lid according to any one of the above aspects and embodiments.
- the description also concerns a method for closing a receptacle having an opening surrounded by a rim (3) using a lid according to any one of the aspects and embodiments above.
- a fibre based snap-on lid can replace plastic lids in numerous applications, providing an environmentally more friendly packaging solution, as the fibre based snap-on lid can be made from entirely renewable resources.
- a fibre based lid can also be recycled and the fibres used in the production of new products, in different blends of both recycled and fresh fibers.
- the flexibility of the fibre based material allows the lid to be removed and replaced without loss of function.
- the lid When used in combination with a membrane, the lid functions as an overcap, protecting the membrane during transport and storage.
- the fibre based lid can be printed and embossed, providing tactile information, and making it esthetically appealing and interesting to the customer.
- the lid is preferably embossed creating a raised shape or pattern 70, for example a purely decorative pattern, or a pattern conwaying information about content, use, or storage of the content of the packaging for which the lid is intended.
- a lid indended for food packaging could be provided with an embossed symbol associated with the type of food the packaging will contain, for example an organge for a packaging containg organge marmelade, or a snowflake for a packaging containing icecream.
- the fibre based snap-on lid can be replaced, closing the receptacle.
- the consumer does not have to use the entire content at once, but can instead close the receptacle after removing one or more servings, and store the remaining content.
- the fibre based snap-on lid offers a light-weight yet strong and stable protection for the contents of the receptacle, or when a membrane is used, protection also for the membrane.
- the inner and/or outer surface of the laminate forming the snap-on lid can be treated to increase the water resistance, to make it impermeable or selectively permeable to gases, to improve printabilty etc.
- the laminate can for example be waxed in order to improve water resistance in an environmentally friendly fashion. It is of course also possible to add thin polymer or metal laminates to the material forming the lid.
- the shape and flexible properties of the lid make it possible to stack the lids durign manufacture, storage and transport.
- a round fibre based snap-on lid for a round paper-based receptacle e.g. a regular single wall paper cup
- a round blank of a paper laminate (FibreForm® from BillerudKorsnäs, Sweden).
- the laminate comprised two layers of paper (FF150), each having a grammage (ISO 536) of 150 g/m 2 and a stretchability of 10 % in both MD and CD.
- the laminate had a thickness of about of 380 ⁇ m, and/or a grammage (ISO 536) of 300g/m 2 .
- the outermost edge of the blank is folded inwards, towards the center of the blank.
- the blank is then press formed to form a lid in the shape of a low cylinder, wherein the inner diameter of the cylinder is about 89 mm, which is substantially the same as the outer diameter of the paper based receptacle, with a top portion and a side wall, wherein the side wall has an inward lip.
- the rim of the receptacle is about 2 mm high
- the height of the side wall is at least 2 mm in addition to the height of the inward lip, so that the upper edge of the inward lip will be positioned below the lower edge of the rim, when the lid is in place on the receptacle.
- the prototype lids exhibited a good locking function, and could be removed and replaced on the cups a few times without the loss of function thanks to the flexibility of the fibre based lid.
- a round blank of a paper laminate two layers of FF150, i.e. FibreForm® from BillerudKorsnäs, Sweden
- the outermost edge of the blank is folded inwards, towards the center of the blank, whereupon a circumferential recess is embossed into the blank.
- the blank is then pressed to form a lid in the shape of a low cylinder, having an embossed bulge on the outside of the sidewall of the lid, and corresponding recess on the inside of the sidewall.
- the dimension of this recess is such, that it can receive and hold the rim.
- the edge of the inward fold is now positioned in the middle or the lower part of the recess, as shown for example in Figs. 4 and 8 , where 130 is the circumferential recess, and 120 is the inward folded part of the laminate.
- the lid snaps in place on a receptacle having a rolled rim, as well as on a receptacle having a straight, non-rolled rim.
- the recess and the edge formed by the inward folded portion of the side wall interact to grip and hold the rim.
- the flexibility of the fibre based lid allows the lid to conform to different shapes and sizes of rims, achieving a releasable locking function.
- the lid from Example 2 is placed on a round receptacle closed with a plastic membrane.
- the membrane is slightly larger than the opening of the receptacle, forming an overhang of about 1 - 3 mm.
- the lid is pressed down, and in turn folds the overhang of the membrane, forming a skirt wedged or pinched between the rim and the side wall of the lid.
- the edge of the skirt at least partially engages with the inward folded edge of the lid.
- the lid is firmly attached to the receptacle, but still easily removable. The firm grip indicates that the recess and the edge formed by the inward folded portion of the side wall, interact and engage both the rim and the membrane.
- the lid is removed, and the membrane peeled off.
- the lid is then replaced on the receptacle, and lightly pressed to fit over the rim. Even without the membrane, the lid is securely attached to the receptacle, yet easily removable. A snap-on function is achieved both with and without the membrane.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL18170008T PL3473560T3 (pl) | 2018-04-30 | 2018-04-30 | Zatrzaskowe wieczko typu snap-on |
EP18170008.9A EP3473560B1 (de) | 2018-04-30 | 2018-04-30 | Schnappdeckel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18170008.9A EP3473560B1 (de) | 2018-04-30 | 2018-04-30 | Schnappdeckel |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3473560A1 true EP3473560A1 (de) | 2019-04-24 |
EP3473560B1 EP3473560B1 (de) | 2021-03-03 |
Family
ID=62104115
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18170008.9A Active EP3473560B1 (de) | 2018-04-30 | 2018-04-30 | Schnappdeckel |
Country Status (2)
Country | Link |
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EP (1) | EP3473560B1 (de) |
PL (1) | PL3473560T3 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021237300A1 (en) * | 2020-05-28 | 2021-12-02 | Zipform Packaging Pty Ltd | Container and seal assembly |
WO2024083306A1 (en) * | 2022-10-17 | 2024-04-25 | N.V. Nutricia | Card based package for sensitive materials |
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WO2021237300A1 (en) * | 2020-05-28 | 2021-12-02 | Zipform Packaging Pty Ltd | Container and seal assembly |
WO2024083306A1 (en) * | 2022-10-17 | 2024-04-25 | N.V. Nutricia | Card based package for sensitive materials |
WO2024083814A1 (en) * | 2022-10-17 | 2024-04-25 | N.V. Nutricia | Card based package for sensitive materials |
Also Published As
Publication number | Publication date |
---|---|
PL3473560T3 (pl) | 2021-10-18 |
EP3473560B1 (de) | 2021-03-03 |
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