WO2004089767A1 - Can lid with gas discharge hole - Google Patents

Can lid with gas discharge hole Download PDF

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Publication number
WO2004089767A1
WO2004089767A1 PCT/KR2004/000771 KR2004000771W WO2004089767A1 WO 2004089767 A1 WO2004089767 A1 WO 2004089767A1 KR 2004000771 W KR2004000771 W KR 2004000771W WO 2004089767 A1 WO2004089767 A1 WO 2004089767A1
Authority
WO
WIPO (PCT)
Prior art keywords
protruded portion
die
lid
tab
gas discharge
Prior art date
Application number
PCT/KR2004/000771
Other languages
French (fr)
Inventor
Hyeon-Kyu Kim
Sang-Hwa Park
Ho-In Woo
Tae-Il Yang
Original Assignee
Hyeon-Kyu Kim
Sang-Hwa Park
Ho-In Woo
Tae-Il Yang
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
Application filed by Hyeon-Kyu Kim, Sang-Hwa Park, Ho-In Woo, Tae-Il Yang filed Critical Hyeon-Kyu Kim
Publication of WO2004089767A1 publication Critical patent/WO2004089767A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G37/00—Combinations of mechanical conveyors of the same kind, or of different kinds, of interest apart from their application in particular machines or use in particular manufacturing processes
    • 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
    • B65D17/4012—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 partially by means of a tearing tab
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
    • B65G47/52—Devices for transferring articles or materials between conveyors i.e. discharging or feeding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
    • B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
    • B65G47/90—Devices for picking-up and depositing articles or materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G57/00—Stacking of articles
    • B65G57/30—Stacking of articles by adding to the bottom of the stack
    • B65G57/301—Stacking of articles by adding to the bottom of the stack by means of reciprocatory or oscillatory lifting and holding or gripping devices
    • B65G57/302—Stacking of articles by adding to the bottom of the stack by means of reciprocatory or oscillatory lifting and holding or gripping devices added articles being lifted to substantially stationary grippers or holders
    • 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
    • B65D2517/0091—Means for venting upon initial opening
    • B65D2517/0092—Means for venting upon initial opening formed as a partial score line located close to the tab connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
    • B65G2201/02—Articles
    • B65G2201/0214—Articles of special size, shape or weigh
    • B65G2201/022—Flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
    • B65G2201/02—Articles
    • B65G2201/0267—Pallets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2207/00—Indexing codes relating to constructional details, configuration and additional features of a handling device, e.g. Conveyors
    • B65G2207/14—Combination of conveyors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2814/00—Indexing codes relating to loading or unloading articles or bulk materials
    • B65G2814/03—Loading or unloading means
    • B65G2814/0301—General arrangements
    • B65G2814/0304—Stacking devices

Definitions

  • the present invention relates to a can lid, which forms thereon a gas discharge hole when it is desired to drink a beverage containing gases from a sealed can, thus preventing rapid discharge of the beverage with gas bubbles from the can through an aperture when opening the can to form the aperture to permit the consumption of the beverage .
  • Sealed cans to contain effervescent beverages charged with gases therein have been typically made of aluminum or steel.
  • a die-cut part 7 provided on an upper surface 2 of the can is levered by a tab 3 mounted by a rivet 4 to the upper surface 2 of the can.
  • a drive end 5 of the tab 3 forcibly pushes downward the die-cut part 7, so that a part of the die-cut part 7 is driven into the can while an edge of the part of the die-cut part 7 is broken along a die-cut line 6.
  • an aperture 7a is formed on the upper surface 2 of the can through a push-open-type manner so that the consuming of the beverage from the aperture 7a is permitted.
  • the gases such as carbon dioxide
  • the gases are typically charged in a liquefied phase in the effervescent beverage contained in the sealed can.
  • the liquefied carbon dioxide may be gasified in the can to thrust the can lid outward under a predetermined high pressure.
  • the can in the above state is opened to form an aperture on the can lid by a levering action of the tab 3 to drive the die-cut part 7 into the can, there occurs a water hammer phenomenon in the can to cause the effervescent beverage with gas bubbles including the carbon dioxide to be rapidly discharged from the can through the aperture. Therefore, the rapid discharge of the beverage makes an outer surface of the can as well as surroundings of the can dirty, and causes a user to feel unpleasant.
  • an object of the present invention is to provide a can lid which prevents any water hammer phenomenon from occurring in a can containing an effervescent beverage charged with gases when a die-cut part of the can is opened, thus preventing rapid discharge of the beverage with gas bubbles from the can.
  • the present invention provides a can lid with a gas discharge hole, which is provided on an upper surface of a sealed can containing therein a beverage charged with gases, thus permitting the consumption of the beverage from an aperture
  • the can lid comprising: a tab hinged to the upper surface of the can by a rivet, with a depressing hole of a predetermined width provided on a drive end of the tab; and a die-cut part defined by a die-cut line on a predetermined portion of the upper surface of the can, thus forming the aperture, with a protruded portion provided on a predetermined portion of the die-cut part to be placed in the depressing hole of the tab and gradually inclined upward on an upper surface thereof in a predetermined direction to provide a predetermined height at an end of the protruded portion, and a die-cut line formed along the end and both sides of a lower edge of the protruded portion to form the gas discharge hole.
  • the protruded portion has an upper edge of which a length is a same as a length of the lower edge of the protruded portion, with an end surface of the protruded portion being shaped at a constant radius of curvature.
  • the protruded portion may have a semicircular shape.
  • the protruded portion may comprise two protruded portions which are arranged to be symmetric with each other in a predetermined direction.
  • the present invention also provides a can lid with a gas discharge hole, which is provided on an upper surface of a sealed can containing therein a beverage charged with gases, thus permitting the consumption of the beverage from an aperture
  • the can lid comprising: a tab hinged to the upper surface of the can by a rivet, with a depressing protrusion of a predetermined size provided on a lower surface of a drive end of the tab; and a die-cut part defined by a die-cut line on a predetermined portion of the upper surface of the can, thus forming the aperture, with a protruded portion provided on the die-cut part to be placed in a depressing hole of the tab and gradually inclined upward on an upper surface thereof in a predetermined direction to provide a predetermined height at an end of the protruded portion, and a die-cut line formed along the end and both sides of a lower edge of the protruded portion to form the gas discharge hole.
  • FIG. 1 is a perspective view of a can according to the present invention
  • FIG. 2 is a sectional view of a part of the can according to the present invention
  • FIG. 3 is a plan view and a sectional view taken along the line A-A' , showing a can lid according to the present invention
  • FIG. 4 is views respectively showing examples of a shape of a protruded portion provided on the can lid according to the present invention.
  • FIG. 5 is a plan view and a sectional view taken along the line B-B' , showing an action of depressing the protruded portion by rotating a tab of the can lid according to the present invention
  • FIG. 6 is a plan view and a sectional view taken along the line C-C , showing a can lid having two protruded portions according to the present invention
  • FIG- 7 is a sectional view of a part of a can according to another embodiment of the present invention
  • FIG. 8 is a plan view and a sectional view taken along the line D-D' , showing a can lid according to the other embodiment of the present invention.
  • FIG. 9 is a plan view and a sectional view taken along the line E-E' , showing an action of depressing a protruded portion by rotating a tab of the can lid according to the other embodiment of the present invention.
  • the can according to the present invention comprises a can body 1 made of a conventional material, such as aluminum, with a tab 3 hinged to an upper surface 2 of the can body 1 by a rivet 4.
  • the tab 3 has a drive end 5 to drive a die-cut part 7 into the can body 1.
  • a depressing hole 10 having a predetermined width is provided on the drive end 5 of the tab 3.
  • the die-cut part 7 is defined by a die-cut line 6 on the upper surface 2 of the can body 1 at a predetermined position around the drive end 5 of the tab 3. Furthermore, a protruded portion 20 is provided on the die-cut part 7 at a predetermined position where the protruded portion 20 is placed in the depressing hole 10 of the tab 3. The protruded portion 20 is gradually inclined upward in a predetermined direction on an upper surface thereof, with a die-cut line 21 formed along a predetermined part of an edge of the protruded portion 20.
  • the protruded portion 20, which is inclined on the upper surface thereof may be constructed to define a rectangular shape when showing it from the top.
  • the protruded portion 20, which is inclined on the upper surface thereof may be constructed to define a semicircular shape at an end thereof when showing it from the top.
  • the protruded portion 20 is constructed in that a length of an upper edge 20b thereof, which is determined based on a reference point 0, is the same as a length of the die-cut line 21 formed along an end and both sides of a lower edge of the protruded portion 20.
  • An end surface 20a which is defined at the end of the protruded portion 20 between the upper and lower edges of the portion 20, is preferably shaped at a constant radius of curvature. Furthermore, the protruded portion 20 is preferably constructed such that the end surface 20a is almost perpendicular to the upper surface 2 of the die-cut part 7. Thus, even when a depressing force applied to the protruded portion 20 varies while the protruded portion 20 is depressed to form a gas discharge hole 21a on the upper surface 2 of the can, the gas discharge hole 21a maintains a predetermined gap t.
  • the protruded portion 20 may comprise two protruded portions, which have the same shape and are provided on the die-cut part to be symmetrically placed in the depressing hole 10 of the tab 3. In the above state, the tab 3 can effectively depress the protruded portion 20 even when a user rotates the tab 3 in either direction.
  • the can lid of the present invention comprises a die-cut part 7 which has a protruded portion 20, with a die-cut line 21 provided along an end and both sides of a lower edge of the protruded portion 20.
  • a depressing protrusion 30 of a predetermined size is provided on a lower surface of a tab 3 at a predetermined position to depress the protruded portion 20 into the can when the tab 3 is .rotated in a predetermined direction.
  • the position of the depressing protrusion 30 on the lower surface of the tab 3 is determined such that, when the tab 3 is rotated in either direction around a rivet 4, the depressing protrusion 30 forms a curve of a predetermined radius of rotation, on which the inclined upper surface of the depressing protrusion 30 is placed.
  • the depressing protrusion 30 effectively depresses and drives the inclined upper surface of the protruded portion 20 into the can to form a gas discharge hole.
  • two protruded portions 20 having the same shape may be preferably provided on the die-cut part to be symmetrically placed on opposite sides of the depressing protrusion 30.
  • the operation of the can lid according to the present invention will be described herein below.
  • a user rotates the tab 3 in a predetermined direction toward the protruded portion 20 of the die-cut part 7 provided on the can lid of the present invention.
  • an edge of the depressing hole 10 of the tab 3 moves along the inclined upper surface of the protruded portion 20 while depressing the protruded portion 20 downward.
  • the die-cut line 21 formed along the end and both sides of the lower edge of the protruded portion 20 is broken.
  • the protruded portion 20 comprises two protruded portions which are provided on the upper surface 2 of the die-cut part 7, the tab 3 effectively depresses the protruded portion 20 even when the user rotates the tab 3 in either direction.
  • the tab 3 is forced upward at its rotated position or after the tab 3 is returned to its original position.
  • the drive end 5 of the tab 3 drives downward the die-cut part 7, so that the die-cut part 7 is driven into the can while being broken along the die-cut line 6 thereof.
  • an aperture 7a is formed on the upper surface of the can to permit the consumption of the beverage from the can.
  • the depressing protrusion 30 provided on the lower surface of the tab 3 moves along the inclined upper surface of the protruded portion 20 while depressing the protruded portion 20 downward.
  • the die-cut line 21 formed along the lower edge of the protruded portion 20 is broken, so that a gas discharge hole 21a is formed between the protruded portion 20 and the upper surface 2 of the die-cut part 7.
  • the tab 3 is returned to its original position and is forced upward.
  • the drive end 5 of the tab 3 drives downward the die-cut part 7, so that the die- cut part 7 is driven into the can while being broken along the die-cut line 6, thus forming an aperture 7a on the upper surface of the can.
  • the protruded portion 20 comprises two protruded portions which are provided on the upper surface of the die-cut part to be symmetric with each other, the tab 3 effectively depresses the protruded portion even when the user rotates the tab 3 in either direction.
  • the present invention provides a can lid which forms thereon a gas discharge hole by a simple structure, thus preventing rapid discharge of the beverage with gas bubbles from the can through an aperture caused by a water hammer phenomenon when opening the can to form the aperture to permit the consumption of the beverage.
  • the can is maintained in a clean state, and allows a user to be pleased with the can.

Abstract

A can lid which forms a gas discharge hole when a user opens the can lid to drink a beverage from a sealed beverage can, thus preventing rapid discharge of the beverage with gas bubbles from the can through an aperture. The can lid includes a tab hinged to an upper surface of the can by a rivet, with a depressing hole provided on a drive end of the tab. A die-cut part is defined by a die-cut line on a predetermined portion of the upper surface of the can, thus forming the aperture. The die-cut part includes thereon a protruded portion placed in the depressing hole of the tab and gradually inclined upward on an upper surface thereof in a predetermined direction, with a die-cut line formed along an end and both sides of a lower edge of the protruded portion, thus forming the gas discharge hole.

Description

CAN LID WITH GAS DISCHARGE HOLE
Technical Field
The present invention relates to a can lid, which forms thereon a gas discharge hole when it is desired to drink a beverage containing gases from a sealed can, thus preventing rapid discharge of the beverage with gas bubbles from the can through an aperture when opening the can to form the aperture to permit the consumption of the beverage .
Background Art
Sealed cans to contain effervescent beverages charged with gases therein have been typically made of aluminum or steel. To drink an effervescent beverage from such a sealed can, a die-cut part 7 provided on an upper surface 2 of the can is levered by a tab 3 mounted by a rivet 4 to the upper surface 2 of the can. In the above state, a drive end 5 of the tab 3 forcibly pushes downward the die-cut part 7, so that a part of the die-cut part 7 is driven into the can while an edge of the part of the die-cut part 7 is broken along a die-cut line 6. Thus, an aperture 7a is formed on the upper surface 2 of the can through a push-open-type manner so that the consuming of the beverage from the aperture 7a is permitted.
However, the gases, such as carbon dioxide, are typically charged in a liquefied phase in the effervescent beverage contained in the sealed can. Thus, when the can is shaken or the temperature of the can rises, the liquefied carbon dioxide may be gasified in the can to thrust the can lid outward under a predetermined high pressure. Thus, when the can in the above state is opened to form an aperture on the can lid by a levering action of the tab 3 to drive the die-cut part 7 into the can, there occurs a water hammer phenomenon in the can to cause the effervescent beverage with gas bubbles including the carbon dioxide to be rapidly discharged from the can through the aperture. Therefore, the rapid discharge of the beverage makes an outer surface of the can as well as surroundings of the can dirty, and causes a user to feel unpleasant.
Disclosure of the Invention
Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a can lid which prevents any water hammer phenomenon from occurring in a can containing an effervescent beverage charged with gases when a die-cut part of the can is opened, thus preventing rapid discharge of the beverage with gas bubbles from the can.
In order to accomplish the above object, the present invention provides a can lid with a gas discharge hole, which is provided on an upper surface of a sealed can containing therein a beverage charged with gases, thus permitting the consumption of the beverage from an aperture, the can lid comprising: a tab hinged to the upper surface of the can by a rivet, with a depressing hole of a predetermined width provided on a drive end of the tab; and a die-cut part defined by a die-cut line on a predetermined portion of the upper surface of the can, thus forming the aperture, with a protruded portion provided on a predetermined portion of the die-cut part to be placed in the depressing hole of the tab and gradually inclined upward on an upper surface thereof in a predetermined direction to provide a predetermined height at an end of the protruded portion, and a die-cut line formed along the end and both sides of a lower edge of the protruded portion to form the gas discharge hole. In the can lid of the present invention, the protruded portion has an upper edge of which a length is a same as a length of the lower edge of the protruded portion, with an end surface of the protruded portion being shaped at a constant radius of curvature. The protruded portion may have a semicircular shape. Furthermore, the protruded portion may comprise two protruded portions which are arranged to be symmetric with each other in a predetermined direction.
The present invention also provides a can lid with a gas discharge hole, which is provided on an upper surface of a sealed can containing therein a beverage charged with gases, thus permitting the consumption of the beverage from an aperture, the can lid comprising: a tab hinged to the upper surface of the can by a rivet, with a depressing protrusion of a predetermined size provided on a lower surface of a drive end of the tab; and a die-cut part defined by a die-cut line on a predetermined portion of the upper surface of the can, thus forming the aperture, with a protruded portion provided on the die-cut part to be placed in a depressing hole of the tab and gradually inclined upward on an upper surface thereof in a predetermined direction to provide a predetermined height at an end of the protruded portion, and a die-cut line formed along the end and both sides of a lower edge of the protruded portion to form the gas discharge hole.
Brief Description of the Drawings
The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. 1 is a perspective view of a can according to the present invention;
FIG. 2 is a sectional view of a part of the can according to the present invention; FIG. 3 is a plan view and a sectional view taken along the line A-A' , showing a can lid according to the present invention;
FIG. 4 is views respectively showing examples of a shape of a protruded portion provided on the can lid according to the present invention;
FIG. 5 is a plan view and a sectional view taken along the line B-B' , showing an action of depressing the protruded portion by rotating a tab of the can lid according to the present invention; FIG. 6 is a plan view and a sectional view taken along the line C-C , showing a can lid having two protruded portions according to the present invention;
FIG- 7 is a sectional view of a part of a can according to another embodiment of the present invention; FIG. 8 is a plan view and a sectional view taken along the line D-D' , showing a can lid according to the other embodiment of the present invention; and
FIG. 9 is a plan view and a sectional view taken along the line E-E' , showing an action of depressing a protruded portion by rotating a tab of the can lid according to the other embodiment of the present invention. Best Mode for Carrying Out the Invention
The can according to the present invention comprises a can body 1 made of a conventional material, such as aluminum, with a tab 3 hinged to an upper surface 2 of the can body 1 by a rivet 4. The tab 3 has a drive end 5 to drive a die-cut part 7 into the can body 1. A depressing hole 10 having a predetermined width is provided on the drive end 5 of the tab 3.
The die-cut part 7 is defined by a die-cut line 6 on the upper surface 2 of the can body 1 at a predetermined position around the drive end 5 of the tab 3. Furthermore, a protruded portion 20 is provided on the die-cut part 7 at a predetermined position where the protruded portion 20 is placed in the depressing hole 10 of the tab 3. The protruded portion 20 is gradually inclined upward in a predetermined direction on an upper surface thereof, with a die-cut line 21 formed along a predetermined part of an edge of the protruded portion 20.
In the present invention, the protruded portion 20, which is inclined on the upper surface thereof, may be constructed to define a rectangular shape when showing it from the top. Alternatively, the protruded portion 20, which is inclined on the upper surface thereof, may be constructed to define a semicircular shape at an end thereof when showing it from the top. Furthermore, the protruded portion 20 is constructed in that a length of an upper edge 20b thereof, which is determined based on a reference point 0, is the same as a length of the die-cut line 21 formed along an end and both sides of a lower edge of the protruded portion 20. An end surface 20a, which is defined at the end of the protruded portion 20 between the upper and lower edges of the portion 20, is preferably shaped at a constant radius of curvature. Furthermore, the protruded portion 20 is preferably constructed such that the end surface 20a is almost perpendicular to the upper surface 2 of the die-cut part 7. Thus, even when a depressing force applied to the protruded portion 20 varies while the protruded portion 20 is depressed to form a gas discharge hole 21a on the upper surface 2 of the can, the gas discharge hole 21a maintains a predetermined gap t.
Furthermore, the protruded portion 20 may comprise two protruded portions, which have the same shape and are provided on the die-cut part to be symmetrically placed in the depressing hole 10 of the tab 3. In the above state, the tab 3 can effectively depress the protruded portion 20 even when a user rotates the tab 3 in either direction.
In another embodiment, the can lid of the present invention comprises a die-cut part 7 which has a protruded portion 20, with a die-cut line 21 provided along an end and both sides of a lower edge of the protruded portion 20. A depressing protrusion 30 of a predetermined size is provided on a lower surface of a tab 3 at a predetermined position to depress the protruded portion 20 into the can when the tab 3 is .rotated in a predetermined direction. In the above state, the position of the depressing protrusion 30 on the lower surface of the tab 3 is determined such that, when the tab 3 is rotated in either direction around a rivet 4, the depressing protrusion 30 forms a curve of a predetermined radius of rotation, on which the inclined upper surface of the depressing protrusion 30 is placed. Thus, the depressing protrusion 30 effectively depresses and drives the inclined upper surface of the protruded portion 20 into the can to form a gas discharge hole. In this embodiment, two protruded portions 20 having the same shape may be preferably provided on the die-cut part to be symmetrically placed on opposite sides of the depressing protrusion 30.
The operation of the can lid according to the present invention will be described herein below. To drink the beverage containing gases from the sealed can, a user rotates the tab 3 in a predetermined direction toward the protruded portion 20 of the die-cut part 7 provided on the can lid of the present invention. In the above state, an edge of the depressing hole 10 of the tab 3 moves along the inclined upper surface of the protruded portion 20 while depressing the protruded portion 20 downward. Thus, the die-cut line 21 formed along the end and both sides of the lower edge of the protruded portion 20 is broken. When the protruded portion 20 comprises two protruded portions which are provided on the upper surface 2 of the die-cut part 7, the tab 3 effectively depresses the protruded portion 20 even when the user rotates the tab 3 in either direction.
When the protruded portion 20 is broken along the die-cut line as described above, a gas discharge hole 21a of a fine size is formed between the protruded portion 20 and the upper surface 2 of the die-cut part 7. Thus, the carbon dioxide charged in the beverage is first discharged from the can through the gas discharge hole 21a.
When the tab 3 having the depressing hole 10 is further rotated in the same direction after the gas discharge hole 21a is formed by the breakage of the protruded portion 20, the end surface 20a of the protruded portion 20 moves downward below the upper surface 2 of the die-cut part 7. In the above state, because the length of the upper edge 20b of the protruded portion 20 is the same as the length of the die-cut line 21 which is formed along the lower edge of the protruded portion 20, the depressed protruded portion 20 smoothly moves downward while maintaining the predetermined gap t of the gas discharge hole 21a.
After the gas discharge hole 21a is formed as described above, the tab 3 is forced upward at its rotated position or after the tab 3 is returned to its original position. Thus, the drive end 5 of the tab 3 drives downward the die-cut part 7, so that the die-cut part 7 is driven into the can while being broken along the die-cut line 6 thereof. When the die-cut part 7 is driven into the can as described above, an aperture 7a is formed on the upper surface of the can to permit the consumption of the beverage from the can. In the above state, because the carbon dioxide charged in the beverage has been discharged from the can through the gas discharge hole 21a, any water hammer phenomenon is prevented from occurring in the can while the aperture 7a is formed on the upper surface of the can. When a user rotates the tab 3 according to the other embodiment in a predetermined direction toward the protruded portion 20 of the die-cut part, the depressing protrusion 30 provided on the lower surface of the tab 3 moves along the inclined upper surface of the protruded portion 20 while depressing the protruded portion 20 downward. Thus, the die-cut line 21 formed along the lower edge of the protruded portion 20 is broken, so that a gas discharge hole 21a is formed between the protruded portion 20 and the upper surface 2 of the die-cut part 7. Thereafter, the tab 3 is returned to its original position and is forced upward. Thus, the drive end 5 of the tab 3 drives downward the die-cut part 7, so that the die- cut part 7 is driven into the can while being broken along the die-cut line 6, thus forming an aperture 7a on the upper surface of the can. When the protruded portion 20 comprises two protruded portions which are provided on the upper surface of the die-cut part to be symmetric with each other, the tab 3 effectively depresses the protruded portion even when the user rotates the tab 3 in either direction.
Industrial Applicability
As described above, the present invention provides a can lid which forms thereon a gas discharge hole by a simple structure, thus preventing rapid discharge of the beverage with gas bubbles from the can through an aperture caused by a water hammer phenomenon when opening the can to form the aperture to permit the consumption of the beverage. Thus, the can is maintained in a clean state, and allows a user to be pleased with the can.

Claims

Claims
1. A can lid with a gas discharge hole, which is provided on an upper surface of a sealed can containing therein a beverage charged with gases, thus permitting the consumption of the beverage from an aperture, the can lid comprising: a tab hinged to the upper surface of the can by a rivet, with a depressing hole of a predetermined width provided on a drive end of the tab; and a die-cut part defined by a die-cut line on a predetermined portion of the upper surface of the can, thus forming the aperture, with a protruded portion provided on a predetermined portion of the die-cut part to be placed in the depressing hole of the tab and gradually inclined upward on an upper surface thereof in a predetermined direction to provide a predetermined height at an end of the protruded portion, and a die-cut line formed along the end and both sides of a lower edge of the protruded portion to form the gas discharge hole.
2. The can lid with the gas discharge hole according to claim 1, wherein the protruded portion has an upper edge of which a length is a same as a length of the lower edge of the protruded portion, with an end surface of the protruded portion being shaped at a constant radius of curvature.
3. The can lid with the gas discharge hole according to claim 1 or 2, wherein the protruded portion has a semicircular shape.
4. The can lid with the gas discharge hole according to claim 3, wherein the protruded portion comprises two protruded portions which are arranged to be symmetric with each other in a predetermined direction.
5. A can lid with a gas discharge hole, which is provided on an upper surface of a sealed can containing therein a beverage charged with gases, thus permitting the consumption of the beverage from an aperture, the can lid comprising: a tab hinged to the upper surface of the can by a rivet, with a depressing protrusion of a predetermined size provided on a lower surface of a drive end of the tab; and a die-cut part defined by a die-cut line on a predetermined portion of the upper surface of the can, thus forming the aperture, with a protruded portion provided on the die-cut part to be depressed by the depressing protrusion of the tab when the tab is rotated around the rivet and gradually inclined upward on an upper surface thereof in a predetermined direction to provide a predetermined height at an end of the protruded portion, and a die-cut line formed along the end and both sides of a lower edge of the protruded portion to form the gas discharge hole.
β. The can lid with the gas discharge hole according to claim 5, wherein the protruded portion has an upper edge of which a length is a same as a length of the lower edge of the protruded portion, with an end surface of the protruded portion being shaped at a constant radius of curvature.
7. The can lid with the gas discharge hole according to claim 5 or 6, wherein the protruded portion has a semicircular shape.
8. The can lid with the gas discharge hole according to claim 7, wherein the protruded portion comprises two protruded portions which are arranged to be symmetric with each other in a predetermined direction.
PCT/KR2004/000771 2003-04-07 2004-04-02 Can lid with gas discharge hole WO2004089767A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2003-0021744 2003-04-07
KR10-2003-0021744A KR100513263B1 (en) 2003-04-07 2003-04-07 Can lid equipped with a gas discharge hole

Publications (1)

Publication Number Publication Date
WO2004089767A1 true WO2004089767A1 (en) 2004-10-21

Family

ID=33157272

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2004/000771 WO2004089767A1 (en) 2003-04-07 2004-04-02 Can lid with gas discharge hole

Country Status (2)

Country Link
KR (1) KR100513263B1 (en)
WO (1) WO2004089767A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09226762A (en) * 1996-02-27 1997-09-02 Hokkai Can Co Ltd Easily openable can lid
JPH09301364A (en) * 1996-05-08 1997-11-25 Yoji Asahi Device for opening liquid containing can
JPH1035662A (en) * 1996-07-23 1998-02-10 Takaaki Kuga Easy-to-open deaerating hole in easy-to-open can lid
KR19980027611U (en) * 1996-11-18 1998-08-05 이상배 Metal beverage container
JP2001018960A (en) * 1999-07-01 2001-01-23 Hokkai Can Co Ltd Stay-on tab type can lid

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09226762A (en) * 1996-02-27 1997-09-02 Hokkai Can Co Ltd Easily openable can lid
JPH09301364A (en) * 1996-05-08 1997-11-25 Yoji Asahi Device for opening liquid containing can
JPH1035662A (en) * 1996-07-23 1998-02-10 Takaaki Kuga Easy-to-open deaerating hole in easy-to-open can lid
KR19980027611U (en) * 1996-11-18 1998-08-05 이상배 Metal beverage container
JP2001018960A (en) * 1999-07-01 2001-01-23 Hokkai Can Co Ltd Stay-on tab type can lid

Also Published As

Publication number Publication date
KR100513263B1 (en) 2005-09-07
KR20040087710A (en) 2004-10-15

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