Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D51/00—Making hollow objects
  • B21D51/16—Making hollow objects characterised by the use of the objects
  • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
  • B21D51/383—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures scoring lines, tear strips or pulling tabs
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D51/00—Making hollow objects
  • B21D51/16—Making hollow objects characterised by the use of the objects
  • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
• • 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
  • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
• • 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
  • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
  • B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
  • B65D17/401—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall
  • B65D17/4011—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall for opening completely by means of a tearing tab
• • 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
  • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
  • B65D2517/0001—Details
  • B65D2517/001—Action for opening container
  • B65D2517/0016—Action for opening container pivot tab, push-down and pull-out tear panel
• • 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
  • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
  • B65D2517/0001—Details
  • B65D2517/0058—Other details of container end panel
  • B65D2517/0059—General cross-sectional shape of container end panel
  • B65D2517/0061—U-shaped
  • B65D2517/0062—U-shaped and provided with an additional U-shaped peripheral channel

Definitions

• the present invention relates to a tab for a closure, to a closure comprising such a tab connected to the closure, to a container comprising a closure provided with such tab, and to a process for making such tab.
• Containers such as food and beverage cans are provided with a closure which may be opened with a tab connected to the closure.
• the tab is grasped by the users finger and due to a lever action exerted with the tab, the closure is popped open. Subsequently, part of the closure is pushed in or torn off, thereby making the content of the container available to the user.
• An example of such a closure is an easy opening end.
• the force required for popping open the closure, the push in force or the tear force are not experienced by the user as excessive and do not interfere with the objective of easy opening the container.
• the initial lifting of the tab out of the plane of the closure over the first millimetres may be considered problematic.
• several closures are disclosed in order to improve the initial lifting and subsequent popping and tearing of the closure by the tab.
• EP 1,205,392 discloses a tab which is provided with a tab lever formed by a separate flexible operating part such as a plastic strand.
• US 5,916,337 discloses a closure of which the tab is provided with an additional pull ring which extends through the tab opening.
• JP 2000-128167 discloses a closure having a tab of which the tab body is provided with a crease line around which the lever part of the tab may be articulated thereby improving the grasping of the tab.
• the pop force and tear force will be increased due to the location of the crease line near the center of the tab.
• the present invention has for its object to provide a tab for a closure of which the lifting force and lifting action will be appreciated by the user as elegant and for popping and/or tearing off the closure the user will not be confronted with required excessive forces to be applied. Still, such tab is to be produced using traditional manufacturing methods. Finally, failure during production and during use is generally to be avoided. With such tab the function of lifting the tab is decoupled from the popping and tearing function of the tab.
• a tab for a closure comprising a tab body having at one side a tab nose for opening the closure, and at the other side a tab lever having a finger opening for activating the tab lever, which finger opening is surrounded by a distal lever part connected by lateral lever legs to the tab body, wherein in the lever legs are formed aligned hinge parts in the form of lateral lever leg parts of reduced bending strength.
• the integral distal lever part is easy to lift out of the plane of the closure thereby facilitating the lifting of the tab for subsequent use by the user.
• the hingable lever leg parts are integral and formed in the lever legs which formation can be implemented in the standard tab formation process without interference. Due to the positioning of the hingable lever leg part in the tab lever an optimal torque is maintained due to the relatively large distance towards the rivet (or other connecting means) and relative to the small distance of the rivet to the tab nose.
• the reduction in bending strength in the lateral lever leg parts could be accomplished by reducing the cross sectional area by height and/or width. It is preferred that in the lateral lever leg parts the width is reduced such that sheet metal for producing the tab of the same thickness could be used. Reduction in width can be accomplished by cutting off material during other cutting operations in the method for producing the tab. According to a preferred embodiment the aligned lateral lever leg parts reside in the zones of the lever legs remote of the tab body. It will be appreciated that the more remote the lever leg parts reside in the lever legs, the larger the lever and thereby the torque force. Accordingly, at the same pop force the user is to exert a lower lever force.
• the bending strength or width of the lateral lever leg parts increases towards the tab body.
• the to and fro movement of the distal lever part will result in a bending in the lever leg parts.
• the bending which takes place first in the most remote zone will result in a strengthening in this zone.
• subsequent to and fro bending will result in a bending in a zone more proximal and thus at a higher bending strength.
• the lateral lever leg parts are flat and adjacent lever leg parts are provided with inner and/or outer bended edges. Risk of injury of the finger of the user in the lateral lever leg parts of reduced bending size, it is preferred that the length of the lateral lever leg parts of reduced bending strength is such that contact with a users finger at the outer edge is substantially avoided. Due to an avoidance of contact injuries of the users finger is substantially avoided.
• the tab is characterized by the features as discussed above.
• Another aspect of the present invention relates to a container provided with a closure having a tab according to the invention.
• a final aspect of the present invention relates to a process for making a tab according to the present invention.
• This process is characterized in that it comprises the forming of a tab from sheet metal which tab comprises a tab body having at one side a tab nose and at the other side a tab lever having a dinger opening which is surrounded by a distal lever part connected by lateral lever legs to the tab body, and forming of aligned lateral lever leg parts of reduced bending strength in the lever legs.
• the formation of the lateral lever parts with reduced bending sides can take place within the traditional tab making process without interference .
• FIG. 1 shows a perspective view of a container provided with a closure having a tab according to the present invention
• FIG 2 shows at larger scale detail II of figure 1
• figure 3 shows a cross section according to line III-III of figure 2 also showing the positions of the tab in figure 7 and 8
• figure 4 and 5 show a top view respectively- bottom view of the tab shown in figure 2
• figures 6 and 7 show alternative embodiments of detail V of figure 4
• figures 8 and 9 show respective views of the use of the tab shown in figure 2
• figure 10 is an alternative of detail IX of figure 8.
• Figure 1 shows a container 1 provided with a closure 2 having a tab 3. The tab is connected to the closure 2 via a rivet 4.
• the tab comprises a tab body 5.
• the tab body 5 is provided with an opening 6 for the rivet 4.
• the opening 6 is partially surrounded by a narrow slot 7 ending in small apertures 8.
• Around a line 9 the tab may be tilted. Near this line 9 the tab body 5 is connected to the tab nose 10.
• the tab lever 11 is provided with a finger opening 12 which is surrounded by a distal lever part 13, lateral lever legs 14 and a proximal lever part 15.
• the lever legs 14 are provided with hinge parts 16 in the form of lever leg parts 17 of reduced bending strength. As shown in figures 2-5, the thickness of the sheet metal of the distal lever part 13, the lateral lever legs and the proximal lever legs is substantially the same. It is m the lever leg parts 17 of reduced bending strength that the width is reduced. The lever leg parts of reduced bending strength are aligned along the line 18 which is substantially parallel to the line 9 and perpendicular to the line 19 passing through the opening 6 and the ultimate part of the tab nose 10.
• the distal lever part has an outer bended edge 20 and an inner bended edge 21.
• the lever legs are provided with similar outer bended edges 22 and inner bended edges 23.
• the bended edge 23 continues m the proximal lever part.
• the bended edge 22 continues over substantially the whole circumference of the tab body 5 and tab nose 10.
• Figure 6 shows an alternative for the lever leg 24 provided with a lever leg part 25 of reduced bending strength.
• the width of the lever leg part of reduced bending strength is substantially the same over its length Accordingly, when to and fro bending forces are applied there may be a risk for failure due to breakage after several bending cycles.
• Figure 7 shows an other alternative.
• the lever leg 26 is provided with a lever leg part 27 of which the width increases towards the tab body which is m the direction of the arrow 28.
• Figures 1, 8 and 9 and in particular fig. 3 illustrate the use of a tab 3 according to the invention for opening the closure 2 of a container 1.
• the finger of the user (not shown) slides via an initial opening of about lmm into the space between the distal lever part 13 of the tab 3 and the closure 2.
• Figure 9 shows that levering the tab 3 by the user, preferably with his finger inserted in the opening 6 will result in a popping of the closure along the score line and a subsequently tearing off.
• the bended outer edge 20 and inner edge 21 allow largest access of the users finger into the space beneath the distal lever part. At the same time these bended regions avoid users finger injuries.
• Figure 10 shows an alternative tab 29.
• the outer edge 20 of the distal lever part 30 is plied whereas the inner edge 31 is not plied but curled as are the inner edges 32 of the tab body and tab nose.
• This tab 30 provides maximum finger access and optimal use and avoidance of injuries.
• the tab according to the invention is suitable for use with any container closure requiring a partial tearing off or pushing inside of a closure part, thereby making access to the content of the container.
• the tab nose pops the container closure at a score line 33 where the opening is formed.
• a tab preform is formed by partially cutting out parts of a strip of sheet metal material. Subsequently, openings and apertures are formed and plied and curled edges are formed by operations carried out in the plane through the sheet of material out of which the tab is formed. It is in this type of operations that in the lever legs aligned lever leg parts are formed, preferably by cutting off material, thereby forming the parts of reduced bending strength. Clearly, the formation of the lateral lever leg parts can take place at the same time as the tab finger opening, the rivet opening and the apertures of the lever bending slots .

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Containers Opened By Tearing Frangible Portions (AREA)
• Closures For Containers (AREA)
• Adornments (AREA)
• Cartons (AREA)
• Making Paper Articles (AREA)

Priority Applications (11)

Applications Claiming Priority (2)

Publications (1)

Family

ID=37467613

Family Applications (1)

Country Status (20)

Cited By (2)

Families Citing this family (19)

Citations (5)

Family Cites Families (25)

• 2006
  • 2006-07-24 EP EP06076465.1A patent/EP1882640B1/en not_active Not-in-force
  • 2006-07-24 ES ES06076465.1T patent/ES2574558T3/es active Active
  • 2006-07-24 HU HUE06076465A patent/HUE027796T2/en unknown
• 2007
  • 2007-07-16 MY MYPI20090341A patent/MY165394A/en unknown
  • 2007-07-16 NZ NZ574291A patent/NZ574291A/en not_active IP Right Cessation
  • 2007-07-16 US US12/374,758 patent/US9511411B2/en not_active Expired - Fee Related
  • 2007-07-16 CN CN2007800282665A patent/CN101522534B/zh not_active Expired - Fee Related
  • 2007-07-16 RU RU2009106082/12A patent/RU2425786C2/ru not_active IP Right Cessation
  • 2007-07-16 CA CA002658448A patent/CA2658448A1/en not_active Abandoned
  • 2007-07-16 AU AU2007278520A patent/AU2007278520B2/en not_active Ceased
  • 2007-07-16 WO PCT/EP2007/006357 patent/WO2008012014A1/en not_active Ceased
  • 2007-07-16 BR BRPI0714674-4A patent/BRPI0714674A2/pt active Search and Examination
  • 2007-07-16 MX MX2009000841A patent/MX2009000841A/es unknown
  • 2007-07-16 JP JP2009521142A patent/JP5495225B2/ja not_active Expired - Fee Related
  • 2007-07-16 ZA ZA200903572A patent/ZA200903572B/xx unknown
  • 2007-07-16 UA UAA200900441A patent/UA96949C2/ru unknown
  • 2007-07-16 KR KR1020097001570A patent/KR101435227B1/ko not_active Expired - Fee Related
• 2009
  • 2009-01-20 NO NO20090306A patent/NO20090306L/no not_active Application Discontinuation
  • 2009-01-20 TN TN2009000019A patent/TN2009000019A1/fr unknown
  • 2009-02-13 MA MA31634A patent/MA30642B1/fr unknown

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