CA1305943C - Cover for plastic container - Google Patents

Cover for plastic container

Info

Publication number
CA1305943C
CA1305943C CA000575290A CA575290A CA1305943C CA 1305943 C CA1305943 C CA 1305943C CA 000575290 A CA000575290 A CA 000575290A CA 575290 A CA575290 A CA 575290A CA 1305943 C CA1305943 C CA 1305943C
Authority
CA
Canada
Prior art keywords
container
panel
lid according
lip
flange
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.)
Expired - Lifetime
Application number
CA000575290A
Other languages
French (fr)
Inventor
Sheldon Berney
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Larson Manufacturing Co
Original Assignee
Larson Manufacturing Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Larson Manufacturing Co filed Critical Larson Manufacturing Co
Application granted granted Critical
Publication of CA1305943C publication Critical patent/CA1305943C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B65D51/00—Closures not otherwise provided for
    • B65D51/18—Arrangements of closures with protective outer cap-like covers or of two or more co-operating closures
    • B65D51/20—Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing
    • 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
    • B65D21/00—Nestable, stackable or joinable containers; Containers of variable capacity
    • B65D21/02—Containers specially shaped, or provided with fittings or attachments, to facilitate nesting, stacking, or joining together
    • B65D21/0209—Containers specially shaped, or provided with fittings or attachments, to facilitate nesting, stacking, or joining together stackable or joined together one-upon-the-other in the upright or upside-down position
    • B65D21/0217—Containers with a closure presenting stacking elements
    • B65D21/0219—Containers with a closure presenting stacking elements the closure presenting projecting peripheral elements receiving or surrounding the bottom or peripheral elements projecting from the bottom of a superimposed 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
    • B65D43/0202—Removable lids or covers without integral tamper element
    • B65D43/0204—Removable lids or covers without integral tamper element secured by snapping over beads or projections
    • B65D43/0212—Removable lids or covers without integral tamper element secured by snapping over beads or projections only on the outside, or a part turned to the outside, of the mouth
    • 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
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0006—Upper closure
    • B65D2251/0018—Upper closure of the 43-type
    • 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
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0068—Lower closure
    • B65D2251/0093—Membrane
    • 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
    • B65D2543/00527—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
    • B65D2543/00537—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
    • B65D2543/00592—Snapping means
    • B65D2543/00601—Snapping means on the container
    • B65D2543/00611—Profiles
    • B65D2543/00657—U-shaped or inverted U
    • 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

Abstract

COVER FOR PLASTIC CONTAINER
ABSTRACT OF THE DISCLOSURE
A container has a mouth with a peripheral lip and a membrane seal extending across the mouth of the container and sealed to the top of the lip. A lid for the container has a flat central panel positioned above the membrane, an intermediate panel extending upwardly from the periphery of the central panel to an outer panel that slopes downwardly to the outside where it meets a peripheral flange at an inside corner resting on the upper outer corner of the container lip. A snap-on flange is provided on the inside of the peripheral flange at a distance normally providing a gap between the bottom of the lip and the top of the snap-on flange. The lid is useful for large size containers that are intended to be stacked.

Description

131~ 13 COVER FOR PLASTIC CONTAINER
FIELD OF THE INVENTION
The present invention relates to lids for large, stacking plastic containers and to the combination of such lids with containers where the container mouth is sealed with a membrane.

BACKGROUND
It is often useful to be able to stack contain-ers for transportation or storage. This is particularly so wlth large, industrial sized containers, for example 5 gallon pails.
The weight of a large container, when filled, is qulte significant and where filled containers are to be stacked, the lid design must be capable of taking the load of the containers stacked above and transmitting it to the containers below. The difficulties of designing a suitable container lid for this purpose are augmented where the container has a membrane æealed across its mouth before the lid ls installed. The lid cannot be permitted to damage the membrane in any way.
The present invention is concerned with the provision of a container lid for large, stacking contain-ers sealed with membranes.

i :L3~S~ 13 SUMMARY
According to one aspect of the present invention there is provided a contalner lid comprising:
a peripheral flange adapted to surround an upper edge of a container;
an outer panel with an outer edge coincident with an upper edge of the peripheral flange and sloping upwardly and inwardly from the outer edge to an inner edge;
a flat centre panel within the outer panel and positioned below the inner edge thereof; and an intermediate panel extending upwardly from the periphery of the centre panel to the inner periphery of the outer panel.
According to another aspect of the present invention there is provided a combined container and lid wherein:
the container comprises a mouth with a peri-pheral lip thereabout, the lip having a bottom edge, and a membrane extending across the mouth of the container and sealed to the top of the peripheral llp; and the lid comprises:
a peripheral flange adapted to surround the lip of the container;
an outer panel having an outer edge 13059'~3 extending along the top edge of the peripheral flange and sloping upwardly and inwardly from the outer edge to an inner edge;
a flat centre panel within the outer panel and positioned below the inner edge of the outer panel;
and an intermediate panel extending upwardly from the periphery of the centre panel to the inner edge of the outer panel.
The flat centre panel serves as the support for containers stacked on the lid. The intermediate panel around the centre panel provides an adequate rim around the centre panel to prevent the stacked container from sliding off the lid. Because the outer panel pro;ects upwardly to the centre, the centre panel may be located above the inside corner between the outer panel and the peripheral flange, so that a membrane across the top of the lid will not be depressed by the centre panel of the lid. In addition, the outer panel is free from engage-ment with the membrane along the top of the peripheral lip of the container and especially at the inside edge of the container mouth so that this area of the membrane is not subjected to a pinching or shearing action that could cause it to lose its lntegrity.

~ .. ..

In preferred embodiments of the lid, the peri-pheral flange carries a coupling flange that is a snap fit over the peripheral lip of the container and that is spaced from the outer edge of the outer panel a distance greater than the vertical size of the peripheral lip.
This allows some vertical play between the lid and the container, so that when the container is sealed hot, any bulging of the membrane can be accommodated.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings which illustrate an exemplary embodiment of the present invention:
Figure 1 is a plan view of a container lid according to the present inventlon;
Figure 2 is a dlametral sectlon of the contain-er of Flgure 1; and Figure 3 ls a detailed radial section showing the manner in which thq lid is mounted on a container.
DETAILED DESCRIPTION
Referring to the accompanying drawings, Figure 3 illustrates a container 10 wlth a generally vertical, cyllndrical wall with a peripheral lip 11 at the upper edge thereof. The lip is a flange with a first portion that extends radiall~ from the upper edge of the contain-er and a second portion pro~ecting downwardly towards the ' .

~ .' 130S9~3 base of the container and defining a lower face llA.
Where the two portions of the flange meet, the upper outer corner 12 is convexly rounded.
When the container is filled, a flexible mem-brane seal 13 is extended across the mouth of the con-tainer and is secured to the top surface 14 of the lip 11. The membrane is a laminated polyester/polyethylene material having a certain flexibility. It ls heat sealed or induction sealed to the lip.
The lid 15 is illustrated in all three figures of the drawings.
The lid 15 has a flat, circular centre panel 16 that ls surrounded by a narrow, annular panel projecting up from the peripheral edge of the centre panel 15 to the lnner edge of an outer panel 18. The outer panel 18 slopes down to lts outside edge 19, where lt meets the top edge of a cylindrical flange 20. The flange 20 surrounds the container lip 11. The inside corner l9A
between the flange 20 and the outer panel 18 is rounded and seats on the outer edge 12 of lip 11.
The flange 20 merges, at its lowermost edge, into an outwardly and downwardly lnclined portlon 21 which terminates ln a substantially vertical lower por-tion 22 directed towards the bottom of the container 10.

131)59'13 Where the peripheral flange 20 meets the flange portion 21, there is an inwardly projecting connecting flange 23 with an upper face 23A that projects centrallY, beneath the lower face llA of the container lip 11. The bottom face of the flange 23 is an upwardly and inwardly sloping camming face continuing the lower face of flange portion 21. This camming face serves to engage the rounded edge 12 of lip 11 when the lid is being pressed onto a container to cam the locking flange 23 outwards to pass the lip 11.
A gap 24 is provided between the upper face 23A
of the coupling flange 23 and the lower face llA of the container llp 11. This allows the natural bulging of the membrane 13 that occurs when the container is sealed hot to raise the lid 15 so as to avoid over-stressing the membrane. On cooling, the membrane assumes the flat con-dltion lllustrated ln Figure 3.
The lid is constructed such that the bottom face of the flat central panel 16 is located vertically above the inside corner l9A between the outer panel 18 and the vertical peripheral flange 20. This prevents any unwanted deformation of the membrane 13 in the normal, at rest state.

"
, 13~)5~

When the containers are stacked, the base of an upper container will be seated on the flat centre panel 16. The annular panel 17 surrounding the centre panel serves to restrain lateral movements of the upper con-tainer. While the flat central panel 16 rests on the top surface of the membrane 13, it will be observed that the upwardly sloping outer panel 18 is entirely out of con-tact with the membrane in the area near the inside edge of the container wall and lip 11. Any stresses on the membrane 13 are thus minimized and are insufficient to cause the membrane to lose its integrity.
While one embodiment of the invention has been described in the foregoing, it is to be understood that other embodiments are possible within the scope of the present invention. Thus, while a circular container has been described, other embodiments may be non-clrcular in outllne. Although the membrane 13 has been described as a polyester/polyethylene laminate, other materials may well be sultable, including laminates of metal foil and thermoplastics.
The centre panel has been described as "flat".
It is to be understood however, that low ridges, for example of 0.075 lnches in height may be provlded on the centre panel in order to restrict the movement of a 130~ 3 stacked container when the stacked container base is somewhat less than the inside diameter of the panel 17.
It is therefore to be understood that the present invention is to be construed as limited solely by the scope of the appended claims.

Claims (19)

1. A container lid comprising:
a peripheral flange adapted to surround an upper edge of a container;
an outer panel with an outer edge coincident with an upper edge of the peripheral flange and sloping upwardly and inwardly from the outer edge to an inner edge;
a flat centre panel within the outer panel and positioned below the inner edge thereof; and an intermediate panel extending upwardly from the periphery of the centre panel to the inner periphery of the outer panel.
2. A container lid according to Claim 1 wherein the flat centre panel is positioned above the inside corner between the peripheral flange and the outer pan-el.
3. A container lid according to Claim 2 wherein the lid is circular.
4. A container lid according to Claim 3 wherein the outer panel is a circular ring.
5. A container lid according to Claim 4 wherein the centre panel is circular.
6. A container lid according to Claim 5 wherein the peripheral flange is cylindrical.
7. A container lid according to Claim 6 including a coupling flange projecting inwardly from the peripheral flange, below the upper edge thereof.
8. A container lid according to Claim 7 including a cam face on the bottom of the coupling flange, sloping upwardly towards the inside.
9. A container lid according to Claim 8 including an outer lip on the peripheral flange, including a down-wardly and outwardly sloping section and a terminal down-wardly projecting section.
10. A combined container and lid wherein:
the container comprises a mouth with a peri-pheral lip thereabout, the lip having a bottom edge, and a membrane extending across the mouth of the container and sealed to the top of the peripheral lip; and the lid comprises:
a peripheral flange adapted to surround the lip of the container;
an outer panel having an outer edge extending along the top edge of the peripheral flange and sloping upwardly and inwardly from the outer edge to an inner edge;
a flat centre panel within the outer panel and positioned below the inner edge of the outer panel;
and an intermediate panel extending upwardly from the periphery of the centre panel to the inner edge of the outer panel.
11. A combined container and lid according to Claim 10 wherein the flat centre panel is positioned above the inside corner between the peripheral flange and the outer panel.
12. A combined container and lid according to Claim 11 wherein the lid is circular.
13. A combined container and lid according to Claim 12 wherein the outer panel is a circular ring.
14. A combined container and lid according to Claim 13 wherein the centre panel is circular.
15. A combined container and lid according to Claim 14 wherein the peripheral flange is cylindrical.
16. A combined container and lid according to Claim 15 including a coupling flange projecting inwardly from the peripheral flange.
17. A combined container and lid according to Claim 16 including a cam face on the bottom of the coupling flange sloping upwardly to the centre, for engagement with the top of the peripheral lip of the container.
18. A combined container and lid according to Claim 17 wherein the coupling flange has an upper face spaced from the inside corner between the peripheral flange and the outer top panel a distance greater than the vertical height of the peripheral lip of the container.
19. A combined container and lid according to Claim 18 wherein the container lip comprises a flange with a first portion extending radially from the upper edge of the container and a second portion projecting towards the base of the container.
CA000575290A 1987-11-03 1988-08-19 Cover for plastic container Expired - Lifetime CA1305943C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8725738 1987-11-03
GB878725738A GB8725738D0 (en) 1987-11-03 1987-11-03 Cover for plastic containers

Publications (1)

Publication Number Publication Date
CA1305943C true CA1305943C (en) 1992-08-04

Family

ID=10626365

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000575290A Expired - Lifetime CA1305943C (en) 1987-11-03 1988-08-19 Cover for plastic container

Country Status (3)

Country Link
US (1) US4856674A (en)
CA (1) CA1305943C (en)
GB (1) GB8725738D0 (en)

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US4856674A (en) 1989-08-15

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