CA2401292A1 - Pail and lid assembly - Google Patents
Pail and lid assembly Download PDFInfo
- Publication number
- CA2401292A1 CA2401292A1 CA 2401292 CA2401292A CA2401292A1 CA 2401292 A1 CA2401292 A1 CA 2401292A1 CA 2401292 CA2401292 CA 2401292 CA 2401292 A CA2401292 A CA 2401292A CA 2401292 A1 CA2401292 A1 CA 2401292A1
- Authority
- CA
- Canada
- Prior art keywords
- pail
- retaining lip
- side wall
- cover portion
- skirt
- 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
Links
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- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 4
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- 238000002372 labelling Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
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- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
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- 238000010102 injection blow moulding Methods 0.000 description 1
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- 238000003860 storage Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- 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
- B65D43/0237—Removable lids or covers with integral tamper element secured by snapping over beads or projections before removal of the tamper element
- B65D43/0256—Removable lids or covers with integral tamper element secured by snapping over beads or projections before removal of the tamper element only on the outside, or a part turned to the outside, 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
- B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
- B65D25/28—Handles
- B65D25/32—Bail handles, i.e. pivoted rigid handles of generally semi-circular shape with pivot points on two opposed sides or wall parts of the conainter
- B65D25/325—Bail handles, i.e. pivoted rigid handles of generally semi-circular shape with pivot points on two opposed sides or wall parts of the conainter integrally formed with 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
- B65D2543/00018—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
- B65D2543/00444—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
- B65D2543/00518—Skirt
-
- 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
-
- 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
- B65D2543/00444—Contact between the container and the lid
- B65D2543/00592—Snapping means
- B65D2543/00601—Snapping means on the container
- B65D2543/00611—Profiles
- B65D2543/00629—Massive bead
-
- 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
- B65D2543/00592—Snapping means
- B65D2543/00601—Snapping means on the container
- B65D2543/00675—Periphery concerned
- B65D2543/00685—Totality
-
- 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
- B65D2543/00592—Snapping means
- B65D2543/00712—Snapping means on the lid
- B65D2543/00722—Profiles
- B65D2543/0074—Massive bead
-
- 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
- B65D2543/00592—Snapping means
- B65D2543/00712—Snapping means on the lid
- B65D2543/00787—Periphery concerned
- B65D2543/00796—Totality
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
Abstract
A pail and lid with an integral handle molded with the lid includes a pail side wall extending upwardly from the pail bottom to an upper peripheral edge.
The lid includes a cover portion shaped to cover the open top and a peripheral skirt depending from said cover portion, said skirt having an upper annular portion and a lower annular portion and both shaped to surround an outer surface of the pail side wall at or adjacent the upper edge and separated by a peripheral tear strip.
The handle is integrally molded with the pail for carrying the pail. The skirt and pail have co-operating upper and lower pairs of retaining lips shaped to snap over each other by downward movement of the cover portion onto the pail to hold the cover portion on the pail. The skirt is sufficiently stiff to allow both snap actions to be effected simultaneously be pressure downwardly from the cover. The lower pair provide greater retaining force such that, prior to pulling the tear strip, co-operation of said lower retaining lip of the peripheral skirt and said lower retaining lip of the pail provides a strong force in maintaining the cover portion on the pail.
The lid includes a cover portion shaped to cover the open top and a peripheral skirt depending from said cover portion, said skirt having an upper annular portion and a lower annular portion and both shaped to surround an outer surface of the pail side wall at or adjacent the upper edge and separated by a peripheral tear strip.
The handle is integrally molded with the pail for carrying the pail. The skirt and pail have co-operating upper and lower pairs of retaining lips shaped to snap over each other by downward movement of the cover portion onto the pail to hold the cover portion on the pail. The skirt is sufficiently stiff to allow both snap actions to be effected simultaneously be pressure downwardly from the cover. The lower pair provide greater retaining force such that, prior to pulling the tear strip, co-operation of said lower retaining lip of the peripheral skirt and said lower retaining lip of the pail provides a strong force in maintaining the cover portion on the pail.
Description
PAIL AND LID ASSEMBLY
This invention relates to a pail and lid assembly which provides a high retention force of the lid on the pail and a tear strip which allows the lid to be removed while providing an indication of tampering.
BACKGROUND OF THE INVENTION
Pails made from polymers such as polyethylene and polypropylene have been used for many years for the transportation and storage of a wide variety of liquid and bulk solid materials. Once filled, these pails are usually fitted with a lid to prevent spillage of the contents and to prevent exposure of the contents to the external environment. It is important that the lid be securely fitted on the pail until the user desires to access the contents. It is also important that the user be able to remove the lid without undue effort and without the aid of any mechanical device or tool. Tear strips are commonly used to facilitate removal of lids which are securely applied to containers.
On example of a pail of this type is shown in US Patent 5,520,306 (Umiker) issued May 28t" 1996 where a tear strip allows the lid to be readily removed and also allows any tampering with the lid to be noted before the lid is removed. In this arrangement also the handle is integrally formed with a separate band which is attached to the top of the pail. However the connection of the lid to the pail does not provide a sufficiently effective engagement which can ensure that the lid is prevented from inadvertent removal. Containers of this type are often required to met UN standards for international shipping which establish minimum levels for resistance to opening of the container in impact damage tests.
This invention relates to a pail and lid assembly which provides a high retention force of the lid on the pail and a tear strip which allows the lid to be removed while providing an indication of tampering.
BACKGROUND OF THE INVENTION
Pails made from polymers such as polyethylene and polypropylene have been used for many years for the transportation and storage of a wide variety of liquid and bulk solid materials. Once filled, these pails are usually fitted with a lid to prevent spillage of the contents and to prevent exposure of the contents to the external environment. It is important that the lid be securely fitted on the pail until the user desires to access the contents. It is also important that the user be able to remove the lid without undue effort and without the aid of any mechanical device or tool. Tear strips are commonly used to facilitate removal of lids which are securely applied to containers.
On example of a pail of this type is shown in US Patent 5,520,306 (Umiker) issued May 28t" 1996 where a tear strip allows the lid to be readily removed and also allows any tampering with the lid to be noted before the lid is removed. In this arrangement also the handle is integrally formed with a separate band which is attached to the top of the pail. However the connection of the lid to the pail does not provide a sufficiently effective engagement which can ensure that the lid is prevented from inadvertent removal. Containers of this type are often required to met UN standards for international shipping which establish minimum levels for resistance to opening of the container in impact damage tests.
SUMMARY OF THE INVENTION
It is one object of the present invention therefore to provide a connection between the lid and the pail which is resistant to opening on impact damage.
Thus, in accordance with a first aspect of the present invention there is provided a container comprising:
a pail comprising:
a pail bottom;
a pail side wall extending upwardly from the pail bottom to an upper peripheral edge spaced from the bottom and defining inwardly of the peripheral edge an open top;
an upper outwardly facing retaining lip extending around the pail side wall at or adjacent the upper edge;
and a lower outwardly facing retaining lip disposed about the pail side wall below the upper outwardly facing retaining lip;
and an integrally molded lid assembly for the pail comprising:
a cover portion shaped to cover the open top;
a peripheral skirt depending from said cover portion, said skirt having an upper annular portion and a lower annular portion, the upper annular portion forming an upper ring shaped to fully and completely surround an outer surface of the pail side wall at or adjacent the upper edge and the lower annular portion forming a lower ring shaped to fully and completely surround an outer surface of the pail side wall at or adjacent the upper edge;
It is one object of the present invention therefore to provide a connection between the lid and the pail which is resistant to opening on impact damage.
Thus, in accordance with a first aspect of the present invention there is provided a container comprising:
a pail comprising:
a pail bottom;
a pail side wall extending upwardly from the pail bottom to an upper peripheral edge spaced from the bottom and defining inwardly of the peripheral edge an open top;
an upper outwardly facing retaining lip extending around the pail side wall at or adjacent the upper edge;
and a lower outwardly facing retaining lip disposed about the pail side wall below the upper outwardly facing retaining lip;
and an integrally molded lid assembly for the pail comprising:
a cover portion shaped to cover the open top;
a peripheral skirt depending from said cover portion, said skirt having an upper annular portion and a lower annular portion, the upper annular portion forming an upper ring shaped to fully and completely surround an outer surface of the pail side wall at or adjacent the upper edge and the lower annular portion forming a lower ring shaped to fully and completely surround an outer surface of the pail side wall at or adjacent the upper edge;
an upper inwardly facing retaining lip extending around said upper portion adapted to co-operate with said upper outwardly facing retaining lip of the side wall to retain said cover portion and said upper portion on said pail;
a lower inwardly facing retaining lip extending around said lower portion adapted to co-operate with said lower outwardly facing retaining lip of the side wall to retain said cover portion and said lower portion on said pail;
and an annular tear strip forming substantially a ring surrounding the outer surface of the pail wall and connecting said upper portion to said lower portion which is tearable around the peripheral skirt to separate the lower portion from the upper portion;
the upper retaining lip of the peripheral skirt being shaped to snap over the upper retaining lip of the pail side wall by downward movement of the cover portion onto the pail to hold the cover portion on the pail;
and the lower retaining lip of the peripheral skirt being shaped to snap over the lower retaining lip of the pail side wall by downward movement of the cover portion onto the pail to hold the cover portion on the paili prior to separation of said upper portion from said lower portion, co-operation of said lower retaining lip of the peripheral skirt and said lower retaining lip of the pail assisting in maintaining the cover portion on the pail;
and after separation of said upper portion from said lower portion by tearing of said tear strip, the lower portion defining said lower ring remaining as a ring on the pail side wall at or adjacent the upper edge so that co-operation of said lower retaining lip of the lower ring and said lower retaining tip of the pail substantially prevents upward vertical displacement of said lower portion relative to said pail.
Preferably the upper and lower retaining lips are arranged such that both retaining lips of the lid assembly snap over the respective retaining lip of the pail side wall by downward movement of the cover portion substantially simultaneously.
Preferably the skirt including the tear strip is sufficiently stiff to cause the communication of forces from the cover portion through the skirt and the tear strip to cause the lower retaining lip of the lid assembly to snap over the lower retaining lip of the pail.
Preferably the retaining lips are arranged such that a pulling force necessary to effect separation of the lower retaining lips is greater than a force necessary to effect separation of the upper retaining lips.
Preferably the lower retaining lip of the pail is formed on an outside surface of a beam ring on the outside of the side wall.
Preferably there is provided a series of angled guide surfaces between the outside surface of the pail side wall and the beam ring for guiding downward movement of lower portion of the skirt.
Preferably the pail includes a shoulder which abuts the lower portion forming the lower ring to prevent dropping of the lower ring on the pail when the tear strip is torn.
Preferably the upper retaining lip of each of the lid assembly and the pail is formed by a single ring.
According to a second aspect of the invention there is provided a container comprising:
an integrally molded pail comprising:
a pail bottom;
a lower inwardly facing retaining lip extending around said lower portion adapted to co-operate with said lower outwardly facing retaining lip of the side wall to retain said cover portion and said lower portion on said pail;
and an annular tear strip forming substantially a ring surrounding the outer surface of the pail wall and connecting said upper portion to said lower portion which is tearable around the peripheral skirt to separate the lower portion from the upper portion;
the upper retaining lip of the peripheral skirt being shaped to snap over the upper retaining lip of the pail side wall by downward movement of the cover portion onto the pail to hold the cover portion on the pail;
and the lower retaining lip of the peripheral skirt being shaped to snap over the lower retaining lip of the pail side wall by downward movement of the cover portion onto the pail to hold the cover portion on the paili prior to separation of said upper portion from said lower portion, co-operation of said lower retaining lip of the peripheral skirt and said lower retaining lip of the pail assisting in maintaining the cover portion on the pail;
and after separation of said upper portion from said lower portion by tearing of said tear strip, the lower portion defining said lower ring remaining as a ring on the pail side wall at or adjacent the upper edge so that co-operation of said lower retaining lip of the lower ring and said lower retaining tip of the pail substantially prevents upward vertical displacement of said lower portion relative to said pail.
Preferably the upper and lower retaining lips are arranged such that both retaining lips of the lid assembly snap over the respective retaining lip of the pail side wall by downward movement of the cover portion substantially simultaneously.
Preferably the skirt including the tear strip is sufficiently stiff to cause the communication of forces from the cover portion through the skirt and the tear strip to cause the lower retaining lip of the lid assembly to snap over the lower retaining lip of the pail.
Preferably the retaining lips are arranged such that a pulling force necessary to effect separation of the lower retaining lips is greater than a force necessary to effect separation of the upper retaining lips.
Preferably the lower retaining lip of the pail is formed on an outside surface of a beam ring on the outside of the side wall.
Preferably there is provided a series of angled guide surfaces between the outside surface of the pail side wall and the beam ring for guiding downward movement of lower portion of the skirt.
Preferably the pail includes a shoulder which abuts the lower portion forming the lower ring to prevent dropping of the lower ring on the pail when the tear strip is torn.
Preferably the upper retaining lip of each of the lid assembly and the pail is formed by a single ring.
According to a second aspect of the invention there is provided a container comprising:
an integrally molded pail comprising:
a pail bottom;
5 a pail side wall extending upwardly from the pail bottom to an upper peripheral edge spaced from the bottom and defining inwardly of the peripheral edge an open top;
an upper outwardly facing retaining lip extending around the pail side wall at or adjacent the upper edge;
a lower outwardly facing retaining lip disposed about the pail side wall below the upper outwardly facing retaining lip;
and a handle for carrying the pail which is an integral part with the pail wall and which extends around the pail wall from a hinge coupling at one side to a generally opposed hinge coupling at the other side;
and an integrally molded lid assembly for the pail comprising:
a cover portion shaped to cover the open top;
a peripheral skirt depending from said cover portion, said skirt having an upper annular portion and a lower annular portion, the upper annular portion forming an upper ring shaped to fully and completely surround an outer surface of the pail side wall at or adjacent the upper edge and the lower annular portion forming a lower ring shaped to fully and completely surround an outer surface of the pail side wall at or adjacent the upper edge;
an upper inwardly facing retaining lip extending around said upper portion adapted to co-operate with said upper outwardly facing retaining lip of the side wall to retain said cover portion and said upper portion on said pail;
a lower inwardly facing retaining lip extending around said lower portion adapted to co-operate with said lower outwardly facing retaining lip of the side wall to retain said cover portion and said lower portion on said pail;
and an annular tear strip forming substantially a ring surrounding the outer surface of the pail wall and connecting said upper portion to said lower portion which is tearable around the peripheral skirt to separate the lower portion from the upper portion;
the upper retaining lip of the peripheral skirt being shaped to snap over the upper retaining lip of the pail side wall by downward movement of the cover portion onto the pail to hold the cover portion on the pail;
and the lower retaining lip of the peripheral skirt being shaped to snap over the lower retaining lip of the pail side wall by downward movement of the cover portion onto the pail to hold the cover portion on the paili prior to separation of said upper portion from said lower portion, co-operation of said lower retaining lip of the peripheral skirt and said lower retaining lip of the pail assisting in maintaining the cover portion on the pail;
and after separation of said upper portion from said lower portion by tearing of said tear strip, the lower portion defining said lower ring remaining as a ring on the pail side wall at or adjacent the upper edge so that co-operation of said lower retaining lip of the lower ring and said lower retaining lip of the pail substantially prevents upward vertical displacement of said lower portion relative to said pail.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a top plan view of a pail and lid assembly according to the present invention.
Figure 2 is a cross sectional view of the pail and lid assembly of Figure 1 taken along the lines 2-2.
Figure 3 is a cross sectional view of the pail and lid assembly of Figure 1 taken along the lines 3-3.
Figure 4 is a cross sectional view of the pail and lid assembly of Figure 1 taken along the lines 4-4.
Figure 5 is a side elevational view of the pail and lid with the handle in position for use.
Figure 6 is a side elevational view of the lid showing the lead end of the tear strip.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The pail and lid assembly of the present invention includes a pail component 12 and a lid 30. The pail 12 has a beam ring 14 which extends circumferentially around the top of the pail near its upper edge. Beam ring 14 has upper portion 16 which extends outwardly and downwardly from pail 12 and lower portion 18 which is vertical. A plurality of evenly spaced beam ribs 20 are disposed on the underside of beam ring 14 and connect pail side wall 22 to the inwardly facing surface of beam ring 14. Side wall 22 may be tapered or cylindrical. Tapering of side wall 22 from top to bottom facilitates nesting of a plurality of empty pails. Top opening 24 and bottom surface 26 are generally circular.
Beam ring type pails are well known in the container industry. The beam ring provides structural reinforcement to the top of the pail and prevents inward collapse of the pail opening. This, in turn, permits the thickness of the side walls to be reduced relative to the side wall thickness of conventional pails.
Although a beam ring type pail has been described, it should be understood that the present invention can be used with other types of pails. For instance, the invention can be used with pails which have an outwardly projecting rim at the top of the pail side wall and which are known by those in the art as "satellite ring pails" or "open head" pails.
Also, the invention is not limited to pails having circular openings. For example, pails with oval, square, rectangular, or any other polygon or rounded shape can be used.
The lid 30 may incorporate any conventional sealing means including, but not limited to, a gasket system, an internal flange or friction fit. Lid may also incorporate any conventional form of auxiliary opening in cover portion including, but not limited to, flex spouts, vents, threaded closures and tear-outs.
The pail and lid components are preferably made from polyethylene or polypropylene. Other suitable polymeric materials can be used depending on the nature of the materials to be contained.
Pail 12 and lid 30 are molded by injection molding or blow molding in a manner well known to those skilled in the art. As indicated above, handle is molded integrally with the pail.. Once molded, pail 12 is filled with its liquid or bulk solid contents and lid is placed over pail opening 24.
Turning now to the cross section shown in Figure 2, the pail 12 includes the pail bottom 26 and the pail side wall 22. The pail side wall is inclined upwardly and outwardly to the top edge 23 and defines a smooth tapered inner surface which is free from inwardly projecting ribs or other obstructions which would interfere with the pail being stacked inside another pail. The outside surface of the side wall 22 is also smooth and frusto-conical up to the beam ring 14 which projects outwardly from the outside surface so that the stacking of two such pails occurs such that the upper edge 23 sits underneath the bottom of the ribs 20 of the beam ring in the stacked position.
The beam ring 14 is defined by a horizontal top flange 35 which projects outwardly from the outer surface of the side wall to an outer edge 36. The beam ring 14 further includes a generally vertical wall 18 which extends downwardly from the flange 35 to a bottom edge 40. The generally vertical wall 18 is thus spaced outwardly from the side wall 22 and forms an annular band surrounding the side wall of an increased diameter relative to the side wall.
The beam ring 14 includes an integrally molded handle 31 which closely follows the curvature of the beam ring. Thus, where the pail 12 and thus the beam ring is circular, the handle is semicircular, extending from the integral flexing hinge 33 at one end to an identical hinge 34 at the other end. The handle 31 is spaced equidistantly around its periphery from the outside surface of the beam ring 14.
In addition to the coupling between the beam ring 14 and the handle at the hinges 33 and 34, there may be also provided at least two additional couplings 75 and 76 in the form of tabs extending across the space 37 between the beam ring 14 and the handle 31. These couplings 75 and 76 act to hold the handle in a common plane with the beam ring when not in use. In addition these couplings and 76, if provided, act to provide a flow path for the plastics material during the 5 injection moulding of the pail structure including the handle. Thus the plastics material in the mould enters through the center of the base of the pail and then extends into the wall and particularly the beam ring 14 and finally passes through the coupling defined by the hinges 33 and 34 and the tab coupling 75 and 76 into the handle to flow into that portion of the mould defining the handle. It is well known that 10 a weak point of a structure such as the handle is formed at the interconnection where plastics flow from two different directions joins or welds to integrate the structure. Thus plastics material flowing through the couplings from the beam ring 14 into the handle meets primarily at the center section 39 of the handle symmetrically between the hinges and between the couplings 75 and 76. The handle may be increased in volume at the center section 39 so that as shown in figure 4 its depth in the vertical direction is increased thus forming a flat strap surface on the inside for engaging the hand of the user. The thicker portion at the center section 39 thus has the advantages of providing a wider surface for the hand of the user and in addition provide an increased amount of plastics material at this point thus overcoming the weaker section at the joiner by increasing the thickness at this point.
The hinge couplings 33 and 34 extend along a part of the beam ring 14 and are connected at an inner edge to the beam ring 14. The hinge couplings terminate at a position 33C where the handle commences and are integral with a handle band portion 33A which extends around the beam ring 14 spaced outwardly therefrom as shown in Figure 3. A V-groove 33B is provided in the top of the band 33A adjacent each hinge coupling to act as a bending point of the band 33A so it can take up a right angle position as shown in Figure 5.
The center section 39 may also be modified to provide two additional wings extending from the center outwardly in an arcuate path around the handle to increase the amount of material at the center and thus improve the welding action.
The lid 30 includes a cover portion 38 and a surrounding skirt 29 having a band 32.
Underneath the flange 35 of the beam ring 14 at the outer edge 36 is provided an annular shoulder 41 which is located outside the vertical wall 18 and underneath the flange 35 against which the band 32 of the skirt 29 abuts. At the bottom edge 40 is provided a rib 42 which projects outwardly and thus provides a horizontal shoulder 43 on which the band 32 sits to prevent the band 32 from dropping downwardly when the tear strip is torn away. This shoulder 43 can also be provided at the top of the beam ring to co-operate with an upper portion of the band 32.
The band 32 at its upper edge has an inwardly turned lip or projection 32A which forms a retaining lip for co-operating with the flange 35. The shoulder 41 also defines with the outer edge 36 and outwardly extending retaining lip 36A
of the pail wall. Thus the retaining lips 32A and 36A co-operate in the closed position to locate the lower band 32 in position on the side wall to hold the band in place against upward vertical movement.
The lower band 32 in connected to an upper band 44 by the tear strip 45. The upper band 44 includes and inwardly turned retaining lip 44A which engages an outwardly turned retaining lip 23A at the upper edge 23. Thus the retaining lips 23A and 44A form an upper retaining element surrounding the periphery of the pail for locating the skirt on the pail. The retaining lip 44A can be continuous or intermittent and can be designed to provide an amount of retention force sufficient for the end use required.
It will be noted that the lip 23A provides a bottom surface which is inclined upwardly and outwardly so that the force necessary to pull the lip 44A over the lip 23A to remove the engagement therebetween is relatively small. To the contrary the lips 32A and 36A provide butting surfaces at or close to right angles to the upward movement necessary to separate those elements so that the force necessary to pull the lip 32A over the lip 36A in the upward direction is significantly greater.
Underneath the lip 23A, the wall 22 has its outer surface 22A recessed from the lip 23A and recessed relative to the outer edge 46 of the band 44 thus defining an open area underneath the lip 23A and above the flange 35. The upper surface of the flange 35 is horizontal. At spaced positions around the periphery there may be provided a plurality of inclined ramp surfaces 46 which connect the outside surface 22A to the outer edge 36 of the flange 35. These act, if provided, as centring elements so as to ramp the bottom edge of the band 32 into position when the band is applied onto the pail in a vertically downward movement as described hereinafter.
From the lip 44A, the upper band 44 is inclined downwardly and outwardly to a bottom edge 44B which is spaced outwardly from the outer surface 22A and spaced upwardly from the flange 35. Between the bottom edge 44B and the top edge 32B of the band 32 is provided the tear strip 45. The thickness of the tear strip is reduced at the side edges of the tear strip that is at its connection with the edges 44B and 32B. The tear strip 45 is inclined outwardly and downwardly from the edge 44B to the edge 32B.
The skirt including the upper band 44, the tear strip 45 and the lower band 32 is shaped and arranged so that the lid can be applied onto the pail by vertically downward movement onto the pail and by pressure applied at the top of the skirt, that is at the junction between the skirt and the cover portion 38.
Thus the skirt is stiff and allows forces to be communicated from a point P downwardly through the skirt 29 to the bottom edge of the lower band 32. In operation, therefore, with the pail filled, the lid is applied onto the pail and the band 32 surrounds the edge 23 and is pushed downwardly around the outside surface 22A of the pail until the bottom edge of the lower band 32 engages the ramps 46. These ramps 46 guide the lower edge of the band 32 onto the outer edge 36 of the flange 35 so that the lower band 32 passes over the outer edge 36 and can be pushed downwardly.
During this pressure at the point P, the skirt is sufficiently stiff to communicate the necessary forces from the point P, through the skirt 29 into the lower band to force the lower band downwardly until the lip 32A sits on top of the lip 36A. At this point the lip 44A sits on top of the lip 23A. Further downward pressure at the point P
therefore acts to simultaneously snap the lip 32A over the lip 36A into the retaining engagement and also to force or snap the lip 44A over the lip 23A to provide its retaining engagement.
The high retaining force of the lower retaining element defined by the lips 32A and 36A ensures that the lid remains in place on the pail until the tear strip 45 is pulled away.
The cover 38 is generally horizontal but includes a downwardly depending surrounding skirt 38A which extends downwardly along the inside surface 22C of the pail side wall. The skirt 38A includes a lower blade portion 38B
which is inclined outwardly so as to provide pressure against the inside surface 22C in a sealing action.
The connecting tabs 75 and 76 can be broken simply by manually grasping the handle section at the center portion 39 and pulling upwardly.
Thus the handle can be pulled upwardly, as shown in Figure 5, to a position in which it extends generally vertically upwardly from the hinges 33 and 34 so that the pail and handle can be manually carried by the user.
When the user requires access to the contents, the tear strip 45 is grasped at its moulded end location or pull tab 45A (Figure 6) and is torn around the skirt to separate the upper band 44 from the lower band 32. The tearing action occurs at the thinner sections at the edges 32B and 44B.
When torn away, the lower band 32 remains in place and is fixed by the high retention forces underneath the lip 36A on the beam ring 14. The bottom edge 44B is exposed and spaced outwardly from the outside surface 22A and above the beam ring 14 so that it can be manually grasped by the fingers of the user. The relatively low retention force at the upper retaining lips allows the upper band 44 and the cover portion to be pulled upwardly releasing the lid from the pail. The lid however can be replaced on the pail simply by pushing back onto the pail so that the 5 snap action of the upper lips retains the upper band 44 in place and the sealing skirt 38A in place around the upper part of the side wall of the pail.
Although the pail and the lid are preferably circular at the open top of the pail, other shapes can also be used including oval and square. In a square pail, the corners will necessarily be relatively rounded to avoid sharp changes in direction 10 which can generate high forces at the junction. In a square pail arrangement, the hinges of the handle are located at the comers and the handle generally follows the outside surface of the pail so that it is also generally rectangular providing a manually graspable section at the corner in between the hinges.
The pails can conveniently be nested. Two or more beam ribs may 15 have beam rib extensions (not shown) which are sized to maintain sufficient space between the pails necessary to avoid too close a fit and the associated difficulty in de-nesting.
The pail and lid assembly of the present invention provides a number of important advantages to pail producers, printers and labellers, fillers and end users. The production of the handle is integrated with the production of the pail.
Thus, the requirement for a separate process to produce handles or the requirement for pail producers to purchase wire handles is eliminated. The need to store and manage a separate inventory of handles for application to the pails is also eliminated. Further, there is no need to install handles on the pails. Because the integration of the handle on the pail does not add appreciably to the cost of producing the pail or to the efficiency of the pail production process, the production of the pail and lid assembly of the present invention is significantly simpler and less costly than the production of prior art assemblies.
As mentioned above, empty pails are often stored by nesting them.
When wire-handled pails are nested, the handle of one pail often drops below the top of the pail below. When the pails are separated, the wire handle catches on the pail below. The pail of the present invention avoids this problem.
If printing and labelling take place before the lid is applied to the pail, the pail and lid assembly of the present invention is advantageous because there is no need to hold the handle away from the side wall of the pail. Similarly, in situations where the pails are printed or labelled after the lid has been applied, the need to position the handle away from the side wall of the pail is eliminated.
This significantly improves the efficiency of the printing and labelling processes and obviates the need to provide mechanisms to retain the handle away from the pail side wall, which mechanisms add to the cost and complexity of the printing and labelling procedures.
Numerous modifications can be made to the pail and lid assembly described herein without departing from the spirit or scope of the invention as defined in the following claims.
an upper outwardly facing retaining lip extending around the pail side wall at or adjacent the upper edge;
a lower outwardly facing retaining lip disposed about the pail side wall below the upper outwardly facing retaining lip;
and a handle for carrying the pail which is an integral part with the pail wall and which extends around the pail wall from a hinge coupling at one side to a generally opposed hinge coupling at the other side;
and an integrally molded lid assembly for the pail comprising:
a cover portion shaped to cover the open top;
a peripheral skirt depending from said cover portion, said skirt having an upper annular portion and a lower annular portion, the upper annular portion forming an upper ring shaped to fully and completely surround an outer surface of the pail side wall at or adjacent the upper edge and the lower annular portion forming a lower ring shaped to fully and completely surround an outer surface of the pail side wall at or adjacent the upper edge;
an upper inwardly facing retaining lip extending around said upper portion adapted to co-operate with said upper outwardly facing retaining lip of the side wall to retain said cover portion and said upper portion on said pail;
a lower inwardly facing retaining lip extending around said lower portion adapted to co-operate with said lower outwardly facing retaining lip of the side wall to retain said cover portion and said lower portion on said pail;
and an annular tear strip forming substantially a ring surrounding the outer surface of the pail wall and connecting said upper portion to said lower portion which is tearable around the peripheral skirt to separate the lower portion from the upper portion;
the upper retaining lip of the peripheral skirt being shaped to snap over the upper retaining lip of the pail side wall by downward movement of the cover portion onto the pail to hold the cover portion on the pail;
and the lower retaining lip of the peripheral skirt being shaped to snap over the lower retaining lip of the pail side wall by downward movement of the cover portion onto the pail to hold the cover portion on the paili prior to separation of said upper portion from said lower portion, co-operation of said lower retaining lip of the peripheral skirt and said lower retaining lip of the pail assisting in maintaining the cover portion on the pail;
and after separation of said upper portion from said lower portion by tearing of said tear strip, the lower portion defining said lower ring remaining as a ring on the pail side wall at or adjacent the upper edge so that co-operation of said lower retaining lip of the lower ring and said lower retaining lip of the pail substantially prevents upward vertical displacement of said lower portion relative to said pail.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a top plan view of a pail and lid assembly according to the present invention.
Figure 2 is a cross sectional view of the pail and lid assembly of Figure 1 taken along the lines 2-2.
Figure 3 is a cross sectional view of the pail and lid assembly of Figure 1 taken along the lines 3-3.
Figure 4 is a cross sectional view of the pail and lid assembly of Figure 1 taken along the lines 4-4.
Figure 5 is a side elevational view of the pail and lid with the handle in position for use.
Figure 6 is a side elevational view of the lid showing the lead end of the tear strip.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The pail and lid assembly of the present invention includes a pail component 12 and a lid 30. The pail 12 has a beam ring 14 which extends circumferentially around the top of the pail near its upper edge. Beam ring 14 has upper portion 16 which extends outwardly and downwardly from pail 12 and lower portion 18 which is vertical. A plurality of evenly spaced beam ribs 20 are disposed on the underside of beam ring 14 and connect pail side wall 22 to the inwardly facing surface of beam ring 14. Side wall 22 may be tapered or cylindrical. Tapering of side wall 22 from top to bottom facilitates nesting of a plurality of empty pails. Top opening 24 and bottom surface 26 are generally circular.
Beam ring type pails are well known in the container industry. The beam ring provides structural reinforcement to the top of the pail and prevents inward collapse of the pail opening. This, in turn, permits the thickness of the side walls to be reduced relative to the side wall thickness of conventional pails.
Although a beam ring type pail has been described, it should be understood that the present invention can be used with other types of pails. For instance, the invention can be used with pails which have an outwardly projecting rim at the top of the pail side wall and which are known by those in the art as "satellite ring pails" or "open head" pails.
Also, the invention is not limited to pails having circular openings. For example, pails with oval, square, rectangular, or any other polygon or rounded shape can be used.
The lid 30 may incorporate any conventional sealing means including, but not limited to, a gasket system, an internal flange or friction fit. Lid may also incorporate any conventional form of auxiliary opening in cover portion including, but not limited to, flex spouts, vents, threaded closures and tear-outs.
The pail and lid components are preferably made from polyethylene or polypropylene. Other suitable polymeric materials can be used depending on the nature of the materials to be contained.
Pail 12 and lid 30 are molded by injection molding or blow molding in a manner well known to those skilled in the art. As indicated above, handle is molded integrally with the pail.. Once molded, pail 12 is filled with its liquid or bulk solid contents and lid is placed over pail opening 24.
Turning now to the cross section shown in Figure 2, the pail 12 includes the pail bottom 26 and the pail side wall 22. The pail side wall is inclined upwardly and outwardly to the top edge 23 and defines a smooth tapered inner surface which is free from inwardly projecting ribs or other obstructions which would interfere with the pail being stacked inside another pail. The outside surface of the side wall 22 is also smooth and frusto-conical up to the beam ring 14 which projects outwardly from the outside surface so that the stacking of two such pails occurs such that the upper edge 23 sits underneath the bottom of the ribs 20 of the beam ring in the stacked position.
The beam ring 14 is defined by a horizontal top flange 35 which projects outwardly from the outer surface of the side wall to an outer edge 36. The beam ring 14 further includes a generally vertical wall 18 which extends downwardly from the flange 35 to a bottom edge 40. The generally vertical wall 18 is thus spaced outwardly from the side wall 22 and forms an annular band surrounding the side wall of an increased diameter relative to the side wall.
The beam ring 14 includes an integrally molded handle 31 which closely follows the curvature of the beam ring. Thus, where the pail 12 and thus the beam ring is circular, the handle is semicircular, extending from the integral flexing hinge 33 at one end to an identical hinge 34 at the other end. The handle 31 is spaced equidistantly around its periphery from the outside surface of the beam ring 14.
In addition to the coupling between the beam ring 14 and the handle at the hinges 33 and 34, there may be also provided at least two additional couplings 75 and 76 in the form of tabs extending across the space 37 between the beam ring 14 and the handle 31. These couplings 75 and 76 act to hold the handle in a common plane with the beam ring when not in use. In addition these couplings and 76, if provided, act to provide a flow path for the plastics material during the 5 injection moulding of the pail structure including the handle. Thus the plastics material in the mould enters through the center of the base of the pail and then extends into the wall and particularly the beam ring 14 and finally passes through the coupling defined by the hinges 33 and 34 and the tab coupling 75 and 76 into the handle to flow into that portion of the mould defining the handle. It is well known that 10 a weak point of a structure such as the handle is formed at the interconnection where plastics flow from two different directions joins or welds to integrate the structure. Thus plastics material flowing through the couplings from the beam ring 14 into the handle meets primarily at the center section 39 of the handle symmetrically between the hinges and between the couplings 75 and 76. The handle may be increased in volume at the center section 39 so that as shown in figure 4 its depth in the vertical direction is increased thus forming a flat strap surface on the inside for engaging the hand of the user. The thicker portion at the center section 39 thus has the advantages of providing a wider surface for the hand of the user and in addition provide an increased amount of plastics material at this point thus overcoming the weaker section at the joiner by increasing the thickness at this point.
The hinge couplings 33 and 34 extend along a part of the beam ring 14 and are connected at an inner edge to the beam ring 14. The hinge couplings terminate at a position 33C where the handle commences and are integral with a handle band portion 33A which extends around the beam ring 14 spaced outwardly therefrom as shown in Figure 3. A V-groove 33B is provided in the top of the band 33A adjacent each hinge coupling to act as a bending point of the band 33A so it can take up a right angle position as shown in Figure 5.
The center section 39 may also be modified to provide two additional wings extending from the center outwardly in an arcuate path around the handle to increase the amount of material at the center and thus improve the welding action.
The lid 30 includes a cover portion 38 and a surrounding skirt 29 having a band 32.
Underneath the flange 35 of the beam ring 14 at the outer edge 36 is provided an annular shoulder 41 which is located outside the vertical wall 18 and underneath the flange 35 against which the band 32 of the skirt 29 abuts. At the bottom edge 40 is provided a rib 42 which projects outwardly and thus provides a horizontal shoulder 43 on which the band 32 sits to prevent the band 32 from dropping downwardly when the tear strip is torn away. This shoulder 43 can also be provided at the top of the beam ring to co-operate with an upper portion of the band 32.
The band 32 at its upper edge has an inwardly turned lip or projection 32A which forms a retaining lip for co-operating with the flange 35. The shoulder 41 also defines with the outer edge 36 and outwardly extending retaining lip 36A
of the pail wall. Thus the retaining lips 32A and 36A co-operate in the closed position to locate the lower band 32 in position on the side wall to hold the band in place against upward vertical movement.
The lower band 32 in connected to an upper band 44 by the tear strip 45. The upper band 44 includes and inwardly turned retaining lip 44A which engages an outwardly turned retaining lip 23A at the upper edge 23. Thus the retaining lips 23A and 44A form an upper retaining element surrounding the periphery of the pail for locating the skirt on the pail. The retaining lip 44A can be continuous or intermittent and can be designed to provide an amount of retention force sufficient for the end use required.
It will be noted that the lip 23A provides a bottom surface which is inclined upwardly and outwardly so that the force necessary to pull the lip 44A over the lip 23A to remove the engagement therebetween is relatively small. To the contrary the lips 32A and 36A provide butting surfaces at or close to right angles to the upward movement necessary to separate those elements so that the force necessary to pull the lip 32A over the lip 36A in the upward direction is significantly greater.
Underneath the lip 23A, the wall 22 has its outer surface 22A recessed from the lip 23A and recessed relative to the outer edge 46 of the band 44 thus defining an open area underneath the lip 23A and above the flange 35. The upper surface of the flange 35 is horizontal. At spaced positions around the periphery there may be provided a plurality of inclined ramp surfaces 46 which connect the outside surface 22A to the outer edge 36 of the flange 35. These act, if provided, as centring elements so as to ramp the bottom edge of the band 32 into position when the band is applied onto the pail in a vertically downward movement as described hereinafter.
From the lip 44A, the upper band 44 is inclined downwardly and outwardly to a bottom edge 44B which is spaced outwardly from the outer surface 22A and spaced upwardly from the flange 35. Between the bottom edge 44B and the top edge 32B of the band 32 is provided the tear strip 45. The thickness of the tear strip is reduced at the side edges of the tear strip that is at its connection with the edges 44B and 32B. The tear strip 45 is inclined outwardly and downwardly from the edge 44B to the edge 32B.
The skirt including the upper band 44, the tear strip 45 and the lower band 32 is shaped and arranged so that the lid can be applied onto the pail by vertically downward movement onto the pail and by pressure applied at the top of the skirt, that is at the junction between the skirt and the cover portion 38.
Thus the skirt is stiff and allows forces to be communicated from a point P downwardly through the skirt 29 to the bottom edge of the lower band 32. In operation, therefore, with the pail filled, the lid is applied onto the pail and the band 32 surrounds the edge 23 and is pushed downwardly around the outside surface 22A of the pail until the bottom edge of the lower band 32 engages the ramps 46. These ramps 46 guide the lower edge of the band 32 onto the outer edge 36 of the flange 35 so that the lower band 32 passes over the outer edge 36 and can be pushed downwardly.
During this pressure at the point P, the skirt is sufficiently stiff to communicate the necessary forces from the point P, through the skirt 29 into the lower band to force the lower band downwardly until the lip 32A sits on top of the lip 36A. At this point the lip 44A sits on top of the lip 23A. Further downward pressure at the point P
therefore acts to simultaneously snap the lip 32A over the lip 36A into the retaining engagement and also to force or snap the lip 44A over the lip 23A to provide its retaining engagement.
The high retaining force of the lower retaining element defined by the lips 32A and 36A ensures that the lid remains in place on the pail until the tear strip 45 is pulled away.
The cover 38 is generally horizontal but includes a downwardly depending surrounding skirt 38A which extends downwardly along the inside surface 22C of the pail side wall. The skirt 38A includes a lower blade portion 38B
which is inclined outwardly so as to provide pressure against the inside surface 22C in a sealing action.
The connecting tabs 75 and 76 can be broken simply by manually grasping the handle section at the center portion 39 and pulling upwardly.
Thus the handle can be pulled upwardly, as shown in Figure 5, to a position in which it extends generally vertically upwardly from the hinges 33 and 34 so that the pail and handle can be manually carried by the user.
When the user requires access to the contents, the tear strip 45 is grasped at its moulded end location or pull tab 45A (Figure 6) and is torn around the skirt to separate the upper band 44 from the lower band 32. The tearing action occurs at the thinner sections at the edges 32B and 44B.
When torn away, the lower band 32 remains in place and is fixed by the high retention forces underneath the lip 36A on the beam ring 14. The bottom edge 44B is exposed and spaced outwardly from the outside surface 22A and above the beam ring 14 so that it can be manually grasped by the fingers of the user. The relatively low retention force at the upper retaining lips allows the upper band 44 and the cover portion to be pulled upwardly releasing the lid from the pail. The lid however can be replaced on the pail simply by pushing back onto the pail so that the 5 snap action of the upper lips retains the upper band 44 in place and the sealing skirt 38A in place around the upper part of the side wall of the pail.
Although the pail and the lid are preferably circular at the open top of the pail, other shapes can also be used including oval and square. In a square pail, the corners will necessarily be relatively rounded to avoid sharp changes in direction 10 which can generate high forces at the junction. In a square pail arrangement, the hinges of the handle are located at the comers and the handle generally follows the outside surface of the pail so that it is also generally rectangular providing a manually graspable section at the corner in between the hinges.
The pails can conveniently be nested. Two or more beam ribs may 15 have beam rib extensions (not shown) which are sized to maintain sufficient space between the pails necessary to avoid too close a fit and the associated difficulty in de-nesting.
The pail and lid assembly of the present invention provides a number of important advantages to pail producers, printers and labellers, fillers and end users. The production of the handle is integrated with the production of the pail.
Thus, the requirement for a separate process to produce handles or the requirement for pail producers to purchase wire handles is eliminated. The need to store and manage a separate inventory of handles for application to the pails is also eliminated. Further, there is no need to install handles on the pails. Because the integration of the handle on the pail does not add appreciably to the cost of producing the pail or to the efficiency of the pail production process, the production of the pail and lid assembly of the present invention is significantly simpler and less costly than the production of prior art assemblies.
As mentioned above, empty pails are often stored by nesting them.
When wire-handled pails are nested, the handle of one pail often drops below the top of the pail below. When the pails are separated, the wire handle catches on the pail below. The pail of the present invention avoids this problem.
If printing and labelling take place before the lid is applied to the pail, the pail and lid assembly of the present invention is advantageous because there is no need to hold the handle away from the side wall of the pail. Similarly, in situations where the pails are printed or labelled after the lid has been applied, the need to position the handle away from the side wall of the pail is eliminated.
This significantly improves the efficiency of the printing and labelling processes and obviates the need to provide mechanisms to retain the handle away from the pail side wall, which mechanisms add to the cost and complexity of the printing and labelling procedures.
Numerous modifications can be made to the pail and lid assembly described herein without departing from the spirit or scope of the invention as defined in the following claims.
Claims (16)
1. A container comprising:
a pail comprising:
a pail bottom;
a pail side wall extending upwardly from the pail bottom to an upper peripheral edge spaced from the bottom and defining inwardly of the peripheral edge an open top;
an upper outwardly facing retaining lip extending around the pail side wall at or adjacent the upper edge;
and a lower outwardly facing retaining lip disposed about the pail side wall below the upper outwardly facing retaining lip;
and an integrally molded lid assembly for the pail comprising:
a cover portion shaped to cover the open top;
a peripheral skirt depending from said cover portion, said skirt having an upper annular portion and a lower annular portion, the upper annular portion forming an upper ring shaped to fully and completely surround an outer surface of the pail side wall at or adjacent the upper edge and the lower annular portion forming a lower ring shaped to fully and completely surround an outer surface of the pail side wall at or adjacent the upper edge;
an upper inwardly facing retaining lip extending around said upper portion adapted to co-operate with said upper outwardly facing retaining lip of the side wall to retain said cover portion and said upper portion on said pail;
a lower inwardly facing retaining lip extending around said lower portion adapted to co-operate with said lower outwardly facing retaining lip of the side wall to retain said cover portion and said lower portion on said pail;
and an annular tear strip forming substantially a ring surrounding the outer surface of the pail wall and connecting said upper portion to said lower portion which is tearable around the peripheral skirt to separate the lower portion from the upper portion;
the upper retaining lip of the peripheral skirt being shaped to snap over the upper retaining lip of the pail side wall by downward movement of the cover portion onto the pail to hold the cover portion on the pail;
and the lower retaining lip of the peripheral skirt being shaped to snap over the lower retaining lip of the pail side wall by downward movement of the cover portion onto the pail to hold the cover portion on the pail;
prior to separation of said upper portion from said lower portion, co-operation of said lower retaining lip of the peripheral skirt and said lower retaining lip of the pail assisting in maintaining the cover portion on the pail;
and after separation of said upper portion from said lower portion by tearing of said tear strip, the lower portion defining said lower ring remaining as a ring on the pail side wall at or adjacent the upper edge so that co-operation of said lower retaining lip of the lower ring and said lower retaining lip of the pail substantially prevents upward vertical displacement of said lower portion relative to said pail.
a pail comprising:
a pail bottom;
a pail side wall extending upwardly from the pail bottom to an upper peripheral edge spaced from the bottom and defining inwardly of the peripheral edge an open top;
an upper outwardly facing retaining lip extending around the pail side wall at or adjacent the upper edge;
and a lower outwardly facing retaining lip disposed about the pail side wall below the upper outwardly facing retaining lip;
and an integrally molded lid assembly for the pail comprising:
a cover portion shaped to cover the open top;
a peripheral skirt depending from said cover portion, said skirt having an upper annular portion and a lower annular portion, the upper annular portion forming an upper ring shaped to fully and completely surround an outer surface of the pail side wall at or adjacent the upper edge and the lower annular portion forming a lower ring shaped to fully and completely surround an outer surface of the pail side wall at or adjacent the upper edge;
an upper inwardly facing retaining lip extending around said upper portion adapted to co-operate with said upper outwardly facing retaining lip of the side wall to retain said cover portion and said upper portion on said pail;
a lower inwardly facing retaining lip extending around said lower portion adapted to co-operate with said lower outwardly facing retaining lip of the side wall to retain said cover portion and said lower portion on said pail;
and an annular tear strip forming substantially a ring surrounding the outer surface of the pail wall and connecting said upper portion to said lower portion which is tearable around the peripheral skirt to separate the lower portion from the upper portion;
the upper retaining lip of the peripheral skirt being shaped to snap over the upper retaining lip of the pail side wall by downward movement of the cover portion onto the pail to hold the cover portion on the pail;
and the lower retaining lip of the peripheral skirt being shaped to snap over the lower retaining lip of the pail side wall by downward movement of the cover portion onto the pail to hold the cover portion on the pail;
prior to separation of said upper portion from said lower portion, co-operation of said lower retaining lip of the peripheral skirt and said lower retaining lip of the pail assisting in maintaining the cover portion on the pail;
and after separation of said upper portion from said lower portion by tearing of said tear strip, the lower portion defining said lower ring remaining as a ring on the pail side wall at or adjacent the upper edge so that co-operation of said lower retaining lip of the lower ring and said lower retaining lip of the pail substantially prevents upward vertical displacement of said lower portion relative to said pail.
2. The container according to Claim 1 wherein the upper and lower retaining lips are arranged such that both retaining lips of the lid assembly snap over the respective retaining lip of the pail side wall by downward movement of the cover portion substantially simultaneously.
3. The container according to Claim 1 or 2 wherein the skirt including the tear strip is sufficiently stiff to cause the communication of forces from the cover portion through the skirt and the tear strip to cause the lower retaining lip of the lid assembly to snap over the lower retaining lip of the pail.
4. The container according to Claim 1, 2 or 3 wherein the retaining lips are arranged such that a pulling force necessary to effect separation of the lower retaining lips is greater than a force necessary to effect separation of the upper retaining lips.
5. The container according to Claim 1, 2, 3 or 4 wherein the lower retaining lip of the pail is formed on an outside surface of a beam ring on the outside of the side wall.
6. The container according to Claim 5 wherein there is provided a series of angled guide surfaces between the outside surface of the pail side wall and the beam ring for guiding downward movement of lower portion of the skirt.
7. The container according to any one of Claims 1 to 6 wherein the pail includes a shoulder which abuts the lower portion forming the lower ring to prevent dropping of the lower ring on the pail when the tear strip is torn.
8. The container according to any one of Claims 1 to 7 wherein the upper retaining lip of each of the lid assembly and the pail is formed by a single ring.
9. A container comprising:
an integrally molded pail comprising:
a pail bottom;
a pail side wall extending upwardly from the pail bottom to an upper peripheral edge spaced from the bottom and defining inwardly of the peripheral edge an open top;
an upper outwardly facing retaining lip extending around the pail side wall at or adjacent the upper edge;
a lower outwardly facing retaining lip disposed about the pail side wall below the upper outwardly facing retaining lip;
and a handle for carrying the pail which is an integral part with the pail wall and which extends around the pail wall from a hinge coupling at one side to a generally opposed hinge coupling at the other side;
and an integrally molded lid assembly for the pail comprising:
a cover portion shaped to cover the open top;
a peripheral skirt depending from said cover portion, said skirt having an upper annular portion and a lower annular portion, the upper annular portion forming an upper ring shaped to fully and completely surround an outer surface of the pail side wall at or adjacent the upper edge and the lower annular portion forming a lower ring shaped to fully and completely surround an outer surface of the pail side wall at or adjacent the upper edge;
an upper inwardly facing retaining lip extending around said upper portion adapted to co-operate with said upper outwardly facing retaining lip of the side wall to retain said cover portion and said upper portion on said pail;
a lower inwardly facing retaining lip extending around said lower portion adapted to co-operate with said lower outwardly facing retaining lip of the side wall to retain said cover portion and said lower portion on said pail;
and an annular tear strip forming substantially a ring surrounding the outer surface of the pail wall and connecting said upper portion to said lower portion which is tearable around the peripheral skirt to separate the lower portion from the upper portion;
the upper retaining lip of the peripheral skirt being shaped to snap over the upper retaining lip of the pail side wall by downward movement of the cover portion onto the pail to hold the cover portion on the pail;
and the lower retaining lip of the peripheral skirt being shaped to snap over the lower retaining lip of the pail side wall by downward movement of the cover portion onto the pail to hold the cover portion on the pail;
prior to separation of said upper portion from said lower portion, co-operation of said lower retaining lip of the peripheral skirt and said lower retaining lip of the pail assisting in maintaining the cover portion on the pail;
and after separation of said upper portion from said lower portion by tearing of said tear strip, the lower portion defining said lower ring remaining as a ring on the pail side wall at or adjacent the upper edge so that co-operation of said lower retaining lip of the lower ring and said lower retaining lip of the pail substantially prevents upward vertical displacement of said lower portion relative to said pail.
an integrally molded pail comprising:
a pail bottom;
a pail side wall extending upwardly from the pail bottom to an upper peripheral edge spaced from the bottom and defining inwardly of the peripheral edge an open top;
an upper outwardly facing retaining lip extending around the pail side wall at or adjacent the upper edge;
a lower outwardly facing retaining lip disposed about the pail side wall below the upper outwardly facing retaining lip;
and a handle for carrying the pail which is an integral part with the pail wall and which extends around the pail wall from a hinge coupling at one side to a generally opposed hinge coupling at the other side;
and an integrally molded lid assembly for the pail comprising:
a cover portion shaped to cover the open top;
a peripheral skirt depending from said cover portion, said skirt having an upper annular portion and a lower annular portion, the upper annular portion forming an upper ring shaped to fully and completely surround an outer surface of the pail side wall at or adjacent the upper edge and the lower annular portion forming a lower ring shaped to fully and completely surround an outer surface of the pail side wall at or adjacent the upper edge;
an upper inwardly facing retaining lip extending around said upper portion adapted to co-operate with said upper outwardly facing retaining lip of the side wall to retain said cover portion and said upper portion on said pail;
a lower inwardly facing retaining lip extending around said lower portion adapted to co-operate with said lower outwardly facing retaining lip of the side wall to retain said cover portion and said lower portion on said pail;
and an annular tear strip forming substantially a ring surrounding the outer surface of the pail wall and connecting said upper portion to said lower portion which is tearable around the peripheral skirt to separate the lower portion from the upper portion;
the upper retaining lip of the peripheral skirt being shaped to snap over the upper retaining lip of the pail side wall by downward movement of the cover portion onto the pail to hold the cover portion on the pail;
and the lower retaining lip of the peripheral skirt being shaped to snap over the lower retaining lip of the pail side wall by downward movement of the cover portion onto the pail to hold the cover portion on the pail;
prior to separation of said upper portion from said lower portion, co-operation of said lower retaining lip of the peripheral skirt and said lower retaining lip of the pail assisting in maintaining the cover portion on the pail;
and after separation of said upper portion from said lower portion by tearing of said tear strip, the lower portion defining said lower ring remaining as a ring on the pail side wall at or adjacent the upper edge so that co-operation of said lower retaining lip of the lower ring and said lower retaining lip of the pail substantially prevents upward vertical displacement of said lower portion relative to said pail.
10. The container according to Claim 9 wherein the upper and lower retaining lips are arranged such that both retaining lips of the lid assembly snap over the respective retaining lip of the pail side wall by downward movement of the cover portion substantially simultaneously.
11. The container according to Claim 9 or 10 wherein the skirt including the tear strip is sufficiently stiff to cause the communication of forces from the cover portion through the skirt and the tear strip to cause the lower retaining lip of the lid assembly to snap over the lower retaining lip of the pail.
12. The container according to Claim 9, 10 or 11 wherein the retaining lips are arranged such that a pulling force necessary to effect separation of the lower retaining lips is greater than a force necessary to effect separation of the upper retaining lips.
13. The container according to Claim 9, 10, 11 or 12 wherein the lower retaining lip of the pail is formed on an outside surface of a beam ring on the outside of the side wall.
14. The container according to Claim 13 wherein there is provided a series of angled guide surfaces between the outside surface of the pail side wall and the beam ring for guiding downward movement of lower portion of the skirt.
15. The container according to any one of Claims 9 to 14 wherein the pail includes a shoulder which abuts the lower portion forming the lower ring to prevent dropping of the lower ring on the pail when the tear strip is torn.
16. The container according to any one of Claims 9 to 15 wherein the upper retaining lip of each of the lid assembly and the pail is formed by a single ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2401292 CA2401292A1 (en) | 2002-09-05 | 2002-09-05 | Pail and lid assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2401292 CA2401292A1 (en) | 2002-09-05 | 2002-09-05 | Pail and lid assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2401292A1 true CA2401292A1 (en) | 2004-03-05 |
Family
ID=32046525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2401292 Abandoned CA2401292A1 (en) | 2002-09-05 | 2002-09-05 | Pail and lid assembly |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2401292A1 (en) |
-
2002
- 2002-09-05 CA CA 2401292 patent/CA2401292A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |