US20050133508A1 - Tamper evident lid welded to a container - Google Patents
Tamper evident lid welded to a container Download PDFInfo
- Publication number
- US20050133508A1 US20050133508A1 US10/738,636 US73863603A US2005133508A1 US 20050133508 A1 US20050133508 A1 US 20050133508A1 US 73863603 A US73863603 A US 73863603A US 2005133508 A1 US2005133508 A1 US 2005133508A1
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- US
- United States
- Prior art keywords
- lid
- container
- skirt
- rim
- 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.)
- Abandoned
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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
- B65D43/00—Lids or covers for rigid or semi-rigid containers
- B65D43/02—Removable lids or covers
- B65D43/0235—Removable lids or covers with integral tamper element
- B65D43/0264—Removable lids or covers with integral tamper element secured only by friction or gravity before removal of the tamper element
- B65D43/0272—Removable lids or covers with integral tamper element secured only by friction or gravity before removal of the tamper element only on the inside, or a part turned to the inside, of the mouth of the container
-
- 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
- B65D43/00—Lids or covers for rigid or semi-rigid containers
- B65D43/02—Removable lids or covers
- B65D43/0235—Removable lids or covers with integral tamper element
- B65D43/0264—Removable lids or covers with integral tamper element secured only by friction or gravity before removal of the tamper element
- B65D43/0268—Removable lids or covers with integral tamper element secured only by friction or gravity before removal of the tamper element on both the inside and the outside of the mouth of the container
- B65D43/027—Removable lids or covers with integral tamper element secured only by friction or gravity before removal of the tamper element on both the inside and the outside of the mouth of the container leaving only an inside friction after removal of the tamper element
-
- 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
- B65D2401/00—Tamper-indicating means
- B65D2401/15—Tearable part of the closure
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00018—Overall construction of the lid
- B65D2543/00027—Stackable lids or covers
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00018—Overall construction of the lid
- B65D2543/00064—Shape of the outer periphery
- B65D2543/00074—Shape of the outer periphery curved
- B65D2543/00092—Shape of the outer periphery curved circular
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00018—Overall construction of the lid
- B65D2543/00259—Materials used
- B65D2543/00296—Plastic
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00342—Central part of the lid
- B65D2543/00398—Reinforcing ribs in the central part of the closure
- B65D2543/00407—Reinforcing ribs in the central part of the closure radial
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00425—Lids or covers welded or adhered to the container
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00444—Contact between the container and the lid
- B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
- 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
- B65D2543/00509—Cup
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00444—Contact between the container and the lid
- 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
- B65D2543/00546—NO contact
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00444—Contact between the container and the lid
- B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
- B65D2543/00555—Contact between the container and the lid on the inside or the outside of the container on both the inside and the outside
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00824—Means for facilitating removing of the closure
- B65D2543/00833—Integral tabs, tongues, handles or similar
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00824—Means for facilitating removing of the closure
- B65D2543/00888—Means for facilitating removing of the closure by applying lever forces
- B65D2543/00898—Means for facilitating removing of the closure by applying lever forces by means of a coin or other tool in recesses or similar on container or lid
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00953—Sealing means
- B65D2543/0099—Integral supplemental sealing lips
Definitions
- This invention relates to a tamper-evident plastic lid and to the combination of the lid welded to a rim of a plastic container.
- the present invention is directed to a one-piece plastic lid which is often applied to a plastic container to provide a tamper-evident replaceable lid such that when it is removed it is apparent to the user that the lid has been tampered with.
- the lid is replaceable in the sense that after using some of the contents or accessing the contents, the lid may be repositioned back onto container in a retained or a generally sealed position to protect the contents against contamination or the like.
- Lids of this general type are usually lightweight, inexpensive and stackable such that they can be stacked in lid applying machines which feed the lids and automatically apply them to filled containers.
- the present invention will be described in conjunction with a preferred and illustrated use, which is that of a lid of the so-called recessed central plug kind which fits into the container and is replaceable to have a friction interfit with the container after the lid has been initially removed from the container.
- the illustrated container is that commonly used in dairy applications for dairy products such as cottage cheese and involves a lightweight plastic tub-like container with an annular rim into which is fitted the plug-fit lid.
- a thin, clear discrete band of clear plastic is wrapped about the container rim and lid skirt and this thin, frangible band must be broken and removed before the lid can be removed from the container. The attaching of this clear band and the cost of this clear band are desired to be eliminated.
- a new, improved lid and container construction is that of a lid of the so-called recessed central plug kind which fits into the container and is replaceable to have a friction interfit with the container after the lid has been initially removed from the container.
- the illustrated container is that commonly used in dairy applications for dairy products such as cottage cheese and involves a
- a new and improved tamper-evident lid for attachment to a plastic container which is welded to the plastic container to provide a permanent interconnection with the container to prevent tampering with the container contents.
- a frangible portion is provided on the lid which can be broken to allow detachment of a replaceable lid portion while leaving a welded portion of the lid welded to the skirt of the container which shows that the lid has been removed.
- a plug-type lid which has a central, recessed panel and an upstanding skirt with a horizontally extending rim portion which is welded to the rim of the container.
- the frangible portion on the skirt is located radially inward of the welded portion and is fractured to allow removal of the replaceable lid from the outer skirt portion of the lid which remains permanently attached to the rim of the container.
- the plug lid may be fitted and pressed back in place, that is replaced to cover the contents after they have been accessed and it is desired to replace the lid.
- This plug lid portion has a friction interfit with the container rim to retain the lid portion on the container.
- the frangible portion is preferably a very thin web of reduced cross-sectional thickness which when is subjected to a pulling force fractures and disconnects the detachable lid from the welded lid portion which remains on the container rim.
- a pull tab may be connected to the detachable lid portion to assist in starting and in fracturing the frangible portion.
- the preferred welding is achieved by the use of a energy director such as a depending bead on the underside of the skirt which is welded to the horizontal portion of the rim of the container.
- a pry slot may be provided on the lid to locate and to indicate where and how the lid portion is detached from the welded portion.
- FIG. 1 is a perspective view of a lid and a container and constructed in accordance with one embodiment of the invention
- FIG. 2 is a plan view of the lid of FIG. 3 ;
- FIG. 3 is another perspective view of another embodiment of a lid and a container
- FIG. 4 is an enlarged cross-sectional view of a lid skirt having an energy director and a frangible portion
- FIG. 5 is a cross-sectional view taken along the line 5 - 5 of FIG. 2 ;
- FIG. 6 is an enlarged cross-sectional view of a skirt portion of the lid
- FIG. 7 is an enlarged cross-sectional view of the lid showing an internal rib in the lid
- FIG. 8 is a cross-sectional view showing the lid welded to a rim of the container.
- FIG. 9 is a side elevational view of a container used with a weldable lid.
- a container and lid assembly 10 is illustrated as comprising a container 11 of plastic material and a lid 12 of plastic such as polypropylene.
- the container may also be made of a suitable plastic.
- Both the lid and the container may be made of various plastic materials, although polypropylene is preferably selected for the lid because it is lightweight and inexpensive and has good properties when subjected to extreme cold as may be the case with various dairy products.
- the lid 12 herein is an injection molded plastic lid that is welded to an injection molded plastic container 11 .
- they are each preferably made of polypropylene plastic.
- the lid and/or container may be made by a thermoforming technique rather than an injection molding technique and still fall within the purview of this invention.
- the present invention is not limited to use of polypropylene as the plastic for either the lid and the container as they made be made of polyethylene or other plastics and still fall within the purview of this invention.
- the illustrated lid 12 is of the plug type in that it has a depending recessed, plug portion 14 which has an outer, encircling upper skirt 16 integrally joined at its lower end to a flat, wide circular central panel portion 18 which is located at the center of the lid.
- the skirt 16 is joined to the central panel 18 by an annular, vertical sidewall 20 .
- the illustrated container 11 has an encircling radially outwardly extending rim portion 22 projecting outwardly from the top of an inclined sidewall 24 which is integrally joined at its lower end to a bottom wall 26 for the container.
- the illustrated container is also injected molded of a plastic material.
- the rim portion 22 has a flat, annular horizontally disposed rim wall 22 a which extends radially outward of the inclined sidewall and terminates in a depending flange 22 b which fits within a depending flange 34 on the skirt of the lid.
- the lid is sealed and is attached to the rim of the container by a weldable portion 28 which is permanently welded to the container rim 22 as shown in FIG. 8 substantially all the way around the lid and the container to make a sealed connection therewith.
- the preferred welded portion includes an energy director 30 ( FIGS. 4 and 6 ) in the form of an encircling annular, bead 32 of plastic depending from a lower surface of an annular, horizontal skirt wall 33 on the lid, as best seen in FIG. 6 .
- the bead 32 has a pointed lower tip 35 which concentrates the ultrasonic welding energy at the tip to quickly raise its temperature of the pointed bead to a melting temperature to aid in initiating the plastic flow of the bead into softened plastic being melted on the encircling, horizontal flange 34 of the container rim 22 .
- the lid When opening the container to access the contents therein, the lid is lifted and pulled upwardly to fracture a frangible portion 40 which is preferably in the form of a thin web 42 ( FIG. 4 ) having a reduced cross-section from the remainder of the skirt 16 of the lid.
- the horizontal extending flange of the lid carrying the lid may be about 0.018 inch thick with the bead about 0.025 inch thick and with the frangible groove portion 40 being several thousandths of an inch less than 0.018 inch in cross-sectional thickness of the skirt wall 33 .
- the welded portion 28 is radially outward of the frangible groove 42 in the skirt wall 33 so that it remains welded to the rim of a container as the frangible web is broken.
- the central detachable, and replaceable lid portion 50 having an annular outer edge having once been a portion of the groove 42 at the location of the thin web in the skirt wall 33 .
- the breaking and tearing of the frangible web provides a tamper-evident feature to the user so that it is evident when the lid has been removed and the contents of the container accessed by someone.
- the user may reapply the lid merely by setting it back with the central plug having its vertical sidewall 20 ; and then pushing the lid down into frictional engagement with the vertical sidewall 24 of the container.
- the lid vertical sidewall 20 is slightly inclined or tapered by about 0.005 inch from its upper end at the lid skirt to a smaller diameter at its lower end 20 b which is joined to a reduced diameter section 20 a which is integrally joined to the central panel 18 .
- the substantially annular channel or fracturable portion 40 and the thin web 42 are formed to extend and to be located downwardly within the skirt wall 33 and then are attached to a separate pull tab 55 as best seen in FIG. 1 .
- the pull tab By grasping the pull tab and pulling it upward, the frangible web will be fractured and torn continually along the substantially annular thin web 42 so that the replaceable lid portion, after it is detached from the welded portion on the container, has an integral pull portion 55 thereon.
- the pry slot 62 has been formed in the lid skirt 16 . Thereby making it more obvious to the user as to where to start to separate the lid portion from the container.
- the pry slot 62 is formed at the skirt and at the pull strip 55 which can be lifted by placing a screwdriver or finger or some other implement into the pry slot and exerting an upward force until the thin channel frangible portion 40 tears around the perimeter of the lid. Once the tear has been completed, the skirt outer annular portion outward of the frangible groove would be retained and attached to the container while the replaceable central panel lid would be detached. Later the plug central panel lid portion can be reapplied by inserting it back into place and pushing down on it.
- the illustrated lids are stacked and nested, one within another, with a corner 20 e ( FIG. 6 ) at the juncture of the lid sidewall 20 and the central panel resting on stacking ribs 70 formed at spaced locations on the lid sidewall 20 .
- the ribs 70 also serve as an internal venting facilities.
- the preferred venting and stacking ribs 70 are preferably located at 45° spacing about the circumference of the skirt wall 20 and projected radially inwardly about the interior of the lid sidewall 20 , as shown in FIG. 7 .
- the illustrated ribs extend downwardly to the lid central panel 18 and extending upwardly above a radius shoulder 20 c as shown in FIG.
- the smaller diameter central panel 18 of an upper lid is seated on a top edge 76 of the spaced ribs 70 in a nested position.
- the top edge 76 of the venting facility rib 70 is located at a height such that it seats a nested lid thereabove with its lower outer edge 78 on its depending skirt flange 66 spaced from the horizontal skirt wall 33 of a lid therebelow to provide a slot or space to allow the insertion of a finger of a lid removing and lid applying equipment for such lids. It is most desirable and necessary that the lid be machine useable with conventional existing package and machinery.
- the frangible portion is described and illustrated as a thin web in the skirt wall, but is to be understood that a scored portion or other weakened portion on the lid may be the frangible portion and that the frangible portion could be repositioned to a location other than that on the horizontally extending skirt wall as illustrated in the embodiments herein described.
Abstract
Description
- This invention relates to a tamper-evident plastic lid and to the combination of the lid welded to a rim of a plastic container.
- The present invention is directed to a one-piece plastic lid which is often applied to a plastic container to provide a tamper-evident replaceable lid such that when it is removed it is apparent to the user that the lid has been tampered with. The lid is replaceable in the sense that after using some of the contents or accessing the contents, the lid may be repositioned back onto container in a retained or a generally sealed position to protect the contents against contamination or the like.
- Lids of this general type are usually lightweight, inexpensive and stackable such that they can be stacked in lid applying machines which feed the lids and automatically apply them to filled containers.
- The present invention will be described in conjunction with a preferred and illustrated use, which is that of a lid of the so-called recessed central plug kind which fits into the container and is replaceable to have a friction interfit with the container after the lid has been initially removed from the container. The illustrated container is that commonly used in dairy applications for dairy products such as cottage cheese and involves a lightweight plastic tub-like container with an annular rim into which is fitted the plug-fit lid. To provide a tamper-evident feature to this plug-fit lid and container, a thin, clear discrete band of clear plastic is wrapped about the container rim and lid skirt and this thin, frangible band must be broken and removed before the lid can be removed from the container. The attaching of this clear band and the cost of this clear band are desired to be eliminated. Thus, there is a need for a new, improved lid and container construction.
- In accordance with the preferred embodiment, there is provided a new and improved tamper-evident lid for attachment to a plastic container which is welded to the plastic container to provide a permanent interconnection with the container to prevent tampering with the container contents. A frangible portion is provided on the lid which can be broken to allow detachment of a replaceable lid portion while leaving a welded portion of the lid welded to the skirt of the container which shows that the lid has been removed.
- In accordance with the preferred embodiment, there is provided a plug-type lid which has a central, recessed panel and an upstanding skirt with a horizontally extending rim portion which is welded to the rim of the container. The frangible portion on the skirt is located radially inward of the welded portion and is fractured to allow removal of the replaceable lid from the outer skirt portion of the lid which remains permanently attached to the rim of the container. The plug lid may be fitted and pressed back in place, that is replaced to cover the contents after they have been accessed and it is desired to replace the lid. This plug lid portion has a friction interfit with the container rim to retain the lid portion on the container. The frangible portion is preferably a very thin web of reduced cross-sectional thickness which when is subjected to a pulling force fractures and disconnects the detachable lid from the welded lid portion which remains on the container rim.
- A pull tab may be connected to the detachable lid portion to assist in starting and in fracturing the frangible portion. The preferred welding is achieved by the use of a energy director such as a depending bead on the underside of the skirt which is welded to the horizontal portion of the rim of the container. Also, a pry slot may be provided on the lid to locate and to indicate where and how the lid portion is detached from the welded portion.
-
FIG. 1 is a perspective view of a lid and a container and constructed in accordance with one embodiment of the invention; -
FIG. 2 is a plan view of the lid ofFIG. 3 ; -
FIG. 3 is another perspective view of another embodiment of a lid and a container; -
FIG. 4 is an enlarged cross-sectional view of a lid skirt having an energy director and a frangible portion; -
FIG. 5 is a cross-sectional view taken along the line 5-5 ofFIG. 2 ; -
FIG. 6 is an enlarged cross-sectional view of a skirt portion of the lid; -
FIG. 7 is an enlarged cross-sectional view of the lid showing an internal rib in the lid; -
FIG. 8 is a cross-sectional view showing the lid welded to a rim of the container; and -
FIG. 9 is a side elevational view of a container used with a weldable lid. - As shown in the drawings for purposes of illustration, a container and
lid assembly 10 is illustrated as comprising acontainer 11 of plastic material and alid 12 of plastic such as polypropylene. The container may also be made of a suitable plastic. Both the lid and the container may be made of various plastic materials, although polypropylene is preferably selected for the lid because it is lightweight and inexpensive and has good properties when subjected to extreme cold as may be the case with various dairy products. - The
lid 12 herein is an injection molded plastic lid that is welded to an injection moldedplastic container 11. To provide a lightweight and low cost injection molded lid and container, they are each preferably made of polypropylene plastic. It is to be understood that the lid and/or container may be made by a thermoforming technique rather than an injection molding technique and still fall within the purview of this invention. Also, the present invention is not limited to use of polypropylene as the plastic for either the lid and the container as they made be made of polyethylene or other plastics and still fall within the purview of this invention. - The illustrated
lid 12 is of the plug type in that it has a depending recessed,plug portion 14 which has an outer, encirclingupper skirt 16 integrally joined at its lower end to a flat, wide circularcentral panel portion 18 which is located at the center of the lid. Theskirt 16 is joined to thecentral panel 18 by an annular,vertical sidewall 20. Although the invention is described herein as a tamper-evident plug-fit lid that is welded to the container, it is to be understood that the invention is not limited to a plug kind of lid. Manifestly, the lid could have a replaceable portion that is not in the shape of a plug and falls within the purview of the claims defining this invention. - The illustrated
container 11, as shown inFIGS. 1 and 8 , has an encircling radially outwardly extendingrim portion 22 projecting outwardly from the top of aninclined sidewall 24 which is integrally joined at its lower end to abottom wall 26 for the container. The illustrated container is also injected molded of a plastic material. Therim portion 22 has a flat, annular horizontally disposed rim wall 22 a which extends radially outward of the inclined sidewall and terminates in a depending flange 22 b which fits within a depending flange 34 on the skirt of the lid. - In accordance with the illustrated embodiment, the lid is sealed and is attached to the rim of the container by a
weldable portion 28 which is permanently welded to thecontainer rim 22 as shown inFIG. 8 substantially all the way around the lid and the container to make a sealed connection therewith. The preferred welded portion includes an energy director 30 (FIGS. 4 and 6 ) in the form of an encircling annular,bead 32 of plastic depending from a lower surface of an annular,horizontal skirt wall 33 on the lid, as best seen inFIG. 6 . Thebead 32 has a pointedlower tip 35 which concentrates the ultrasonic welding energy at the tip to quickly raise its temperature of the pointed bead to a melting temperature to aid in initiating the plastic flow of the bead into softened plastic being melted on the encircling, horizontal flange 34 of thecontainer rim 22. - When opening the container to access the contents therein, the lid is lifted and pulled upwardly to fracture a
frangible portion 40 which is preferably in the form of a thin web 42 (FIG. 4 ) having a reduced cross-section from the remainder of theskirt 16 of the lid. By way of example only, the horizontal extending flange of the lid carrying the lid may be about 0.018 inch thick with the bead about 0.025 inch thick and with thefrangible groove portion 40 being several thousandths of an inch less than 0.018 inch in cross-sectional thickness of theskirt wall 33. Thewelded portion 28 is radially outward of thefrangible groove 42 in theskirt wall 33 so that it remains welded to the rim of a container as the frangible web is broken. This leaves the central detachable, andreplaceable lid portion 50 having an annular outer edge having once been a portion of thegroove 42 at the location of the thin web in theskirt wall 33. Manifestly, the breaking and tearing of the frangible web provides a tamper-evident feature to the user so that it is evident when the lid has been removed and the contents of the container accessed by someone. After accessing the contents, the user may reapply the lid merely by setting it back with the central plug having itsvertical sidewall 20; and then pushing the lid down into frictional engagement with thevertical sidewall 24 of the container. Herein, the lidvertical sidewall 20 is slightly inclined or tapered by about 0.005 inch from its upper end at the lid skirt to a smaller diameter at itslower end 20 b which is joined to a reduceddiameter section 20 a which is integrally joined to thecentral panel 18. - In the embodiment illustrated in
FIG. 1 , the substantially annular channel orfracturable portion 40 and thethin web 42 are formed to extend and to be located downwardly within theskirt wall 33 and then are attached to aseparate pull tab 55 as best seen inFIG. 1 . By grasping the pull tab and pulling it upward, the frangible web will be fractured and torn continually along the substantially annularthin web 42 so that the replaceable lid portion, after it is detached from the welded portion on the container, has anintegral pull portion 55 thereon. - In the embodiment shown in
FIGS. 2 and 3 , thepry slot 62 has been formed in thelid skirt 16. Thereby making it more obvious to the user as to where to start to separate the lid portion from the container. As shown inFIGS. 2 and 3 , thepry slot 62 is formed at the skirt and at thepull strip 55 which can be lifted by placing a screwdriver or finger or some other implement into the pry slot and exerting an upward force until the thin channelfrangible portion 40 tears around the perimeter of the lid. Once the tear has been completed, the skirt outer annular portion outward of the frangible groove would be retained and attached to the container while the replaceable central panel lid would be detached. Later the plug central panel lid portion can be reapplied by inserting it back into place and pushing down on it. - The illustrated lids are stacked and nested, one within another, with a
corner 20 e (FIG. 6 ) at the juncture of thelid sidewall 20 and the central panel resting on stackingribs 70 formed at spaced locations on thelid sidewall 20. In order to prevent a vacuum from forming between adjacent stacked lids as interferes with feeding automatically, theribs 70 also serve as an internal venting facilities. The preferred venting and stackingribs 70 are preferably located at 45° spacing about the circumference of theskirt wall 20 and projected radially inwardly about the interior of thelid sidewall 20, as shown inFIG. 7 . The illustrated ribs extend downwardly to the lidcentral panel 18 and extending upwardly above aradius shoulder 20 c as shown inFIG. 7 between theupper portion 20 b of thelid sidewall 20 and thelower portion 20 a of thelid sidewall 20 as shown inFIGS. 5 and 7 . With the lids nested for feeding by an automatic lid applying machine, the smaller diametercentral panel 18 of an upper lid is seated on atop edge 76 of the spacedribs 70 in a nested position. Thetop edge 76 of theventing facility rib 70 is located at a height such that it seats a nested lid thereabove with its lowerouter edge 78 on its dependingskirt flange 66 spaced from thehorizontal skirt wall 33 of a lid therebelow to provide a slot or space to allow the insertion of a finger of a lid removing and lid applying equipment for such lids. It is most desirable and necessary that the lid be machine useable with conventional existing package and machinery. - Although the energy direction has been shown and described as being on the lid, it is to be understood that the energy director could be on the container rim and still fall within the purview of the claims of the invention. The frangible portion is described and illustrated as a thin web in the skirt wall, but is to be understood that a scored portion or other weakened portion on the lid may be the frangible portion and that the frangible portion could be repositioned to a location other than that on the horizontally extending skirt wall as illustrated in the embodiments herein described.
- From the foregoing, it will be seen that there has been provided a new and improved lid and container which have a welded portion retained while the reapplied, tamper-evident lid portion is free to be reapplied after the contents of the container accessed to protect the container contents until it is desired to access again the contents.
Claims (23)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/738,636 US20050133508A1 (en) | 2003-12-17 | 2003-12-17 | Tamper evident lid welded to a container |
PCT/US2004/042183 WO2005058721A1 (en) | 2003-12-17 | 2004-12-15 | Tamper evident lid welded to a container |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/738,636 US20050133508A1 (en) | 2003-12-17 | 2003-12-17 | Tamper evident lid welded to a container |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050133508A1 true US20050133508A1 (en) | 2005-06-23 |
Family
ID=34677423
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/738,636 Abandoned US20050133508A1 (en) | 2003-12-17 | 2003-12-17 | Tamper evident lid welded to a container |
Country Status (2)
Country | Link |
---|---|
US (1) | US20050133508A1 (en) |
WO (1) | WO2005058721A1 (en) |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080035641A1 (en) * | 2006-08-14 | 2008-02-14 | Steve Foldesi | Dual tab lid |
WO2008021262A2 (en) * | 2006-08-14 | 2008-02-21 | Nestech Machine Systems, Inc. | Dual and single tab lids |
US20080302798A1 (en) * | 2007-06-08 | 2008-12-11 | Foldesi Sr Steve | Single tab lid |
US20090020530A1 (en) * | 2007-07-17 | 2009-01-22 | Baughman Gary M | Plastic plug with overcap |
DE202007015072U1 (en) * | 2007-10-30 | 2009-03-12 | Jokey Plastik Wipperfürth GmbH | Container with lid |
US20100155289A1 (en) * | 2008-12-24 | 2010-06-24 | Darryl Nazareth | Resealable food container with lid having a tamper evident tear away band |
US20100181323A1 (en) * | 2009-01-20 | 2010-07-22 | Anchor Packaging, Inc. | Food container having improved tamper evident features |
US20100314391A1 (en) * | 2008-02-08 | 2010-12-16 | Baughman Gary M | Plastic plug with overcap, including wrench and method |
US20110239597A1 (en) * | 2007-10-18 | 2011-10-06 | Mccormick & Company, Incorporated | Tamper Resistant Container with Locking Rim |
WO2013126328A1 (en) * | 2012-02-23 | 2013-08-29 | Amcor Limited | Container with reinforced upper portion for receiving welded closure |
US8584887B2 (en) | 2010-10-27 | 2013-11-19 | Alexander Segal | Tamper evident container utilizing sealed interface between container and lid |
US8701919B2 (en) | 2010-07-16 | 2014-04-22 | Cascades Canada Ulc | Plastic container |
US20140246109A1 (en) * | 2012-01-20 | 2014-09-04 | Aerazur | Protective sheath, in particular for electrical cables, and method for manufacturing same |
USD742222S1 (en) | 2013-11-27 | 2015-11-03 | Scott P. Liu | Packaging device |
CN106005727A (en) * | 2016-07-19 | 2016-10-12 | 常州胜威塑料有限公司 | Antifake plastic container |
US9745106B2 (en) | 2013-03-15 | 2017-08-29 | Sabert Corporation | Tamper-evident containers |
US20190144171A1 (en) * | 2017-11-15 | 2019-05-16 | Douglas Stephen Plastics, Inc. | Tamper-evident lock for one-piece thermoformed container |
US20190351129A1 (en) * | 2014-06-09 | 2019-11-21 | Becton, Dickinson And Company | Tamper-Evident Pen Needle Outer Cover |
USD928566S1 (en) * | 2019-09-30 | 2021-08-24 | Pacotrade Ag | Food container |
USD930476S1 (en) * | 2019-10-28 | 2021-09-14 | Zume, Inc. | Cap for a beverage keg |
USD963477S1 (en) * | 2019-10-02 | 2022-09-13 | Pizza Hut, Llc | Pizza container cover |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10723523B2 (en) | 2017-01-10 | 2020-07-28 | Fabri-Kal Corporation | Tamper evident container having bonded tab |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008021262A2 (en) * | 2006-08-14 | 2008-02-21 | Nestech Machine Systems, Inc. | Dual and single tab lids |
WO2008021262A3 (en) * | 2006-08-14 | 2008-06-26 | Nestech Machine Systems Inc | Dual and single tab lids |
US20080035641A1 (en) * | 2006-08-14 | 2008-02-14 | Steve Foldesi | Dual tab lid |
US8720727B2 (en) | 2006-08-14 | 2014-05-13 | Nestech Machine Systems, Inc. | Dual tab lid |
US8491738B2 (en) | 2007-06-08 | 2013-07-23 | Nestech Machine Systems, Inc. | Single tab lid |
US20080302798A1 (en) * | 2007-06-08 | 2008-12-11 | Foldesi Sr Steve | Single tab lid |
US20090020530A1 (en) * | 2007-07-17 | 2009-01-22 | Baughman Gary M | Plastic plug with overcap |
US20110239597A1 (en) * | 2007-10-18 | 2011-10-06 | Mccormick & Company, Incorporated | Tamper Resistant Container with Locking Rim |
DE202007015072U1 (en) * | 2007-10-30 | 2009-03-12 | Jokey Plastik Wipperfürth GmbH | Container with lid |
US20100314391A1 (en) * | 2008-02-08 | 2010-12-16 | Baughman Gary M | Plastic plug with overcap, including wrench and method |
US8061543B2 (en) | 2008-02-08 | 2011-11-22 | Rieke Corporation | Plastic plug with overcap, including wrench and method |
US8066139B2 (en) | 2008-02-08 | 2011-11-29 | Rieke Corporation | Plastic plug with overcap, including wrench and method |
US20100155289A1 (en) * | 2008-12-24 | 2010-06-24 | Darryl Nazareth | Resealable food container with lid having a tamper evident tear away band |
US8672166B2 (en) | 2008-12-24 | 2014-03-18 | Sabert Corporation | Resealable food container with lid having a tamper evident tear away band |
US20100181323A1 (en) * | 2009-01-20 | 2010-07-22 | Anchor Packaging, Inc. | Food container having improved tamper evident features |
US8701919B2 (en) | 2010-07-16 | 2014-04-22 | Cascades Canada Ulc | Plastic container |
US8584887B2 (en) | 2010-10-27 | 2013-11-19 | Alexander Segal | Tamper evident container utilizing sealed interface between container and lid |
US20140246109A1 (en) * | 2012-01-20 | 2014-09-04 | Aerazur | Protective sheath, in particular for electrical cables, and method for manufacturing same |
US9428297B2 (en) | 2012-02-23 | 2016-08-30 | Amcor Limited | Container with reinforced upper portion for receiving welded closure |
WO2013126328A1 (en) * | 2012-02-23 | 2013-08-29 | Amcor Limited | Container with reinforced upper portion for receiving welded closure |
US9745106B2 (en) | 2013-03-15 | 2017-08-29 | Sabert Corporation | Tamper-evident containers |
US10427842B2 (en) | 2013-03-15 | 2019-10-01 | Sabert Corporation | Tamper-evident containers |
USD742222S1 (en) | 2013-11-27 | 2015-11-03 | Scott P. Liu | Packaging device |
US10912880B2 (en) * | 2014-06-09 | 2021-02-09 | Becton, Dickinson And Company | Tamper-evident pen needle outer cover |
US20190351129A1 (en) * | 2014-06-09 | 2019-11-21 | Becton, Dickinson And Company | Tamper-Evident Pen Needle Outer Cover |
CN106005727A (en) * | 2016-07-19 | 2016-10-12 | 常州胜威塑料有限公司 | Antifake plastic container |
US20190144171A1 (en) * | 2017-11-15 | 2019-05-16 | Douglas Stephen Plastics, Inc. | Tamper-evident lock for one-piece thermoformed container |
US10723524B2 (en) * | 2017-11-15 | 2020-07-28 | Easypak Dsp, Llc | Tamper-evident lock for thermoformed container |
USD928566S1 (en) * | 2019-09-30 | 2021-08-24 | Pacotrade Ag | Food container |
USD963477S1 (en) * | 2019-10-02 | 2022-09-13 | Pizza Hut, Llc | Pizza container cover |
USD930476S1 (en) * | 2019-10-28 | 2021-09-14 | Zume, Inc. | Cap for a beverage keg |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: FLEET NATIONAL BANK, AS COLLATERAL AGENT, MASSACHU Free format text: SECURITY AGREEMENT;ASSIGNOR:BERRY PLASTICS CORPORATION;REEL/FRAME:016164/0241 Effective date: 20050603 |
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AS | Assignment |
Owner name: CREDIT SUISSE, AS ADMINISTRATIVE AGENT,NEW YORK Free format text: SECURITY AGREEMENT;ASSIGNOR:BERRY PLASTICS CORPORATION;REEL/FRAME:018291/0155 Effective date: 20060920 Owner name: CREDIT SUISSE, AS ADMINISTRATIVE AGENT, NEW YORK Free format text: SECURITY AGREEMENT;ASSIGNOR:BERRY PLASTICS CORPORATION;REEL/FRAME:018291/0155 Effective date: 20060920 |
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AS | Assignment |
Owner name: WELLS FARGO BANK, N.A., AS COLLATERAL AGENT,CONNEC Free format text: SECOND LIEN PATENT SECURITY AGREEMENT;ASSIGNORS:BERRY PLASTICS CORPORATION;BERRY STERLING CORPORATION;KERR GROUP, INC.;AND OTHERS;REEL/FRAME:018407/0074 Effective date: 20060920 Owner name: WELLS FARGO BANK, N.A., AS COLLATERAL AGENT, CONNE Free format text: SECOND LIEN PATENT SECURITY AGREEMENT;ASSIGNORS:BERRY PLASTICS CORPORATION;BERRY STERLING CORPORATION;KERR GROUP, INC.;AND OTHERS;REEL/FRAME:018407/0074 Effective date: 20060920 |
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