GB1590580A – Containers
– Google Patents
GB1590580A – Containers
– Google Patents
Containers
Download PDF
Info
Publication number
GB1590580A
GB1590580A
GB39877/76A
GB3987776A
GB1590580A
GB 1590580 A
GB1590580 A
GB 1590580A
GB 39877/76 A
GB39877/76 A
GB 39877/76A
GB 3987776 A
GB3987776 A
GB 3987776A
GB 1590580 A
GB1590580 A
GB 1590580A
Authority
GB
United Kingdom
Prior art keywords
openable
score line
sidewall
folded
top panel
Prior art date
1977-09-22
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
Application number
GB39877/76A
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.)
Crown Packaging UK Ltd
Original Assignee
Metal Box PLC
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.)
1977-09-22
Filing date
1977-09-22
Publication date
1981-06-03
1977-09-22
Application filed by Metal Box PLC
filed
Critical
Metal Box PLC
1977-09-22
Priority to GB39877/76A
priority
Critical
patent/GB1590580A/en
1977-09-23
Priority to ES1977230976U
priority
patent/ES230976Y/en
1981-06-03
Publication of GB1590580A
publication
Critical
patent/GB1590580A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
B—PERFORMING OPERATIONS; TRANSPORTING
B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21D51/00—Making hollow objects
B21D51/16—Making hollow objects characterised by the use of the objects
B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
B21D51/383—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures scoring lines, tear strips or pulling tabs
B—PERFORMING OPERATIONS; TRANSPORTING
B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
B65D17/401—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall
Description
(54) CONTAINERS
(71) We, METAL Box LIMITED, of
Queens House, Forbury Road, Reading
RG1 3JH, Berkshire, a British Company, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:- This invention relates to containers having means for providing an aperture therein and methods of making the same.
Cans are known which have a tear tab attached to a removable portion of the can end. However, not only are these tear tabs costly but also the tear tab and removable portion of the end can be an undesirable form of litter and the removable portion, often having a sharp edge, can cause cuts.
With these problems in mind easy opening ends have been developed for beverage cans wherein a portion of the end is pushed inwards to open the can. However, apart from the questionable hygiene of pushing a portion of the outer surface into the contents of the can, such an arrangement also puts the user in danger of cutting his finger on the -thin metal around the opening.
Bntish Patent Specification number 392590 describes can ends having a removable portion defined by.a score line. The removable portion has a ‘continuous upstanding rib extending adjacent the score line. A surface of the rib is inclined to the plane of the can end so that a lever may be inserted under the surface and over the score line so that the removable portion may be prised from the rest of the can end. However, the torn edges around the opening, created during tearing of the score line, are liable to be sharp and possibly dangerous.
This invention provides a can end having a peripheral cover hook, a ohuck wall dependant from -the cover hook, ala ansular central panel within the chuck wall and.an openable portion within the central panel, the openable portion Shaving a tQp -panel -bounded by a folded sidewall joined at a -score -line -to a folded margin ofthe central panel around the openable portion, wherein tthe folded sidewall of the openable portion comprises an upper portion extending downwardly under and away from the top panel and a lower portion extending in a direction away from the inner periphery of the upper portion to the score line so that the upper and lower portions define a cavity into which a lever may be inserted to lever open the openable portion using the chuck wall as a fulcrum.
In one embodiment the folded margin extends under the score line to define an aperture under the openable portion.
In a preferred embodiment the folded margin is located adjacent to and radially outside the score line, ends of the score line being joined by a hinge which, with the score line defines the openable portion. The top panel may if desired have a sloping shape rising in a direction away from the hinge towards a high side wall portion opposite the hinge.
This invention further provides a method of making such a can end, said method comprising the steps of stretching a portion of the central panel to raise an openable portion out of the plane of the panel reshaping the stretched portion to have a top panel, a first side wall portion dependant therefrom,.an annular joining portion extending from the first sidewall portion to a second sidewall portion; collapsing the second sidewall portion to the form of an annular folded margin around the openable portion, scoring the upper surface of the folded margin to define the openable portion substantially within the annular folded margin of the can end; and reforming the first sidewall portion to include upper and lower portions defining a cavity into which an instrument may be inserted to open the openable portion.
The scoring may fully define the openable portion or alternately an unscored portion may be left to serve as a hinge portion connecting the openable portion to the annular portion.
The step of reforming the side ;wall -to define the instrument zeceiving cavity may, if desired be Wlocalised to -only part of the side wall and may-include reforming to arrange the top panel to slope upwardly and outwardly from the hinge.
Various embodiments of the invention will now be described by way of example and with reference to the accompanying drawings in which: Fig. 1 is a side elevation of the top end of a prior art sectioned upon a diameter;
Fig. 2 is a like view of a first embodiment of the invention;
Fig. 3 is a like view of an alternative embodiment of the invention; and
Fig. 4a to 4g show diagrammatically the sequence of operations used to manufacture the embodiment of Figs. 2 and 3.
In Fig. 1, the known can body 1 is joined to a can end 2 by a soldered seam 3. The can end 2 has an openable portion 4 joined at a score line 5 to an annular portion 6 which extends from the score line 5 to the soldered seam 3.
The openable portion 4 comprises a closure panel 7 which is bounded by an upstanding rib 8. The outer peripheral surface 9 of the rib 8 is inclined upwardly and outwardly towards the seam 3. To open the openable portion 4, a lever 10 is inserted to bear upon the outer peripheral surface, so that, using the seam 3 as a fulcrum, downward pressure (as arrowed) upon the lever breaks the score line 5, to separate the openable portion 4 from the annular portion 6.
The can end 12 of Fig. 2 comprises an openable portion 14 joined at a score line 15 to a central panel portion 16. The central panel 16 extends outwardly from the score line 15 to a chuck wall surrounded by a cover hook 13 which is suitable for attachment to a can body by means of a double seam well known in the art.
The openable portion 14 comprises a top panel 17 and a side wall 18 which has an upper portion 19 extending downwardly under and away from the top panel 17, and a lower portion 20 extending outwardly and downwardly to the score line 15.
The annular portion 16 has a folded margin 21, extending around and adjacent to the score line 15. The folded margin 21
comprises an upper portion 22 connecting the score line 15 to a middle portion 23 which
connects the upper portion to a substantially planar lower portion 24. In Fig. 2, the score line 15 in the upper portion 22 is centrally placed over the middle and lower portions
23, 24.
When the can end of Fig. 2 is opened by
means of a lever, in the manner described
with reference to Fig. 1, the score line 15 is
torn open and the torn edge, so created,
therefore lies within the bounds of the middle
portion 23. The folded portions 23, 24 then define a smooth aperture which, in Fig. 2 is
depicted as being nearly equal to the full
diameter of the can end 12. The can end 12 is therefore suitable for containers such as are used for powders which are lifted out by means of a spoon.
The can end 25 of Fig. 3 has an openable portion 26, which is considerably smaller in area than the area of the can end. The openable portion is located near the chuck wall 31 of the can end. Such relatively small openable portions are suitable for cans containing beverages or other fluid products.
The can end 25 of Fig. 3 is particularly characterised by the location of the score line 27 with respect to the folded margin 28 and the sloping shape of the top panel 29 of the openable portion 26.
The openable portion 26 is defined by the score line 27 and an unscored hinge portion 30 which extends between the ends of the score line.
Referring to the left hand side of Fig. 3 it will be seen that the folded margin 28 is close to the chuck wall 31. The score line 27 is located adjacent to but radially inwards from the folded margin 28 and extends around the openable portion to the hinge 30.
The openable portion 26 has high side wall portion 32 near the chuck wall 31 and a collapsible side wall portion 33 diametrically across from the high side wall portion.
The openable portion 26 may be opened by pressing on the top portion 29. During the period of time when the user presses hard to initiate breaking of the score line 27 his finger is spaced away from the score line by the height of the high side wall portion. As the score line breaks the openable portion enters the aperture defined by the folded portion 28.
The folded margin 28 serves to mask the torn edge around the aperture so making it safe for the user to push the openable portion 26 into a can to which it has been fitted.
Preferably however, the user opens the can end 25 of Fig. 3 by means of a lever using the chuck wall 31 as a fulcrum to lever against the concave high side wall portion 32.
The method of manufacturing the embodiments of Figs. 2 and 3 comprises the following steps which are described with reference to
Fig. 4. A can end blank 34, as shown in Fig.
4(a), is placed between tools 37, 38 and the tools are brought to engage with a portion of the centre panel 35 to raise a portion 36 by stretching, as shown in Fig. 4(b). The stretched portion 36 is reshaped by tools 39, 40, to have a top panel, a first side wall portion, an annular joining portion which extends radially outwards to join a second side wall portion to the first side wall portion as shown in Fig. 4(c). The second side wall portion is flattened by tools 41, 42 to become a folded margin lying radially in and substantially parallel to the plane of the blank. An optional tool member 43 serves to locate the blank and prevent any inward collapse of the second side wall portion, as shown in Fig.
4(d). The annular joining portion is therefore the upper surface portion of the folded margin which is scored as shown in diagrammatically in Fig. 4(e), the detailed location of the scoring tool 44 and the location of the support tool 45 being chosen to correspond with the embodiments of Figs. 2 or 3.
If the embodiment of Fig. 2 is to be made, then the first side wall portion is deformed to a concave shape. This may be achieved either by compressing the top panel surface of the raised portion to extrude the material and draw the top of the first side wall portion outwards. Alternatively axial pressure from flat tools 46, 47 may be used to compress the first side wall portion to a concave shape as shown in Fig. 4(f).
The embodiment of Fig. 3 is made by using a contoured tool 48 working against a suitable anvil 49 as shown in Fig. 4(g).
Can ends according to the invention may be made from aluminium or tinplate or other suitable sheet metals.
WHAT WE CLAIM IS:
1. A can end having a peripheral cover hook, a chuck wall dependant from the cover hook, an annular central panel within the chuck wall and an openable portion within the central panel, the openable portion having a top panel bounded by a folded sidewall joined at a score line to a folded margin of the central panel around the openable portion, wherein the folded sidewall of the openable portion comprises an upper portion extending downwardly under and away from the top panel and a lower portion extending in a direction away from the inner periphery of the upper portion to the score line so that the upper and lower portions define a cavity into which a lever may be inserted to lever open the openable portion using the chuck wall as a fulcrum.
2. A can end according to claim 1 wherein the folded margin extends under the score line to define an aperture under the openable portion.
3. A can end according to claim 1 wherein the folded margin is located adjacent to and radially outside the score line.
4. A can end according to claim 3 claim wherein the openable portion is defined by a score line and a hinge portion extending between the ends of the score line.
5. A can end according to claim 4 wherein the top panel has a sloping shape rising in a direction away from the hinge towards a high sidewall portion opposite the hinge.
6. A method of making a can end according to any preceding claim, said method comprising the steps of stretching a portion of the central panel to raise an openable portion out of the plane of the panel; reshaping the stretched portion to have a top panel, a first sidewall portion dependant therefrom, an annular joining portion extending from the first sidewall portion to a second sidewall portion; collapsing the second sidewall portion to the form of an annular folded margin around the openable portion, scoring the upper surface of the folded margin to define the openable portion substantially within the annular folded margin of the can end; and reforming the first sidewall portion to include the upper and lower portions defining a cavity into which an instrument may be inserted to open the openable portion.
7. A method according to claim 6 wherein the upper surface of the folded portion is scored leaving an unscored hinge portion.
8. A method according to claim 7 wherein the first sidewall is only locally deformed to an instrument receiving cavity and the top panel is reformed to slope upwardly and outwardly from the hinge.
9. A can end substantially as hereinbefore described with reference to Fig. 2 of the accompanying drawings.
10. A can end substantially as hereinbefore described with reference to Fig. 3 of the accompanying drawings.
11. A method of making a can end substantially as hereinbefore described with reference to Figs. 2 to 4 of the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (11)
**WARNING** start of CLMS field may overlap end of DESC **. 4(d). The annular joining portion is therefore the upper surface portion of the folded margin which is scored as shown in diagrammatically in Fig. 4(e), the detailed location of the scoring tool 44 and the location of the support tool 45 being chosen to correspond with the embodiments of Figs. 2 or 3. If the embodiment of Fig. 2 is to be made, then the first side wall portion is deformed to a concave shape. This may be achieved either by compressing the top panel surface of the raised portion to extrude the material and draw the top of the first side wall portion outwards. Alternatively axial pressure from flat tools 46, 47 may be used to compress the first side wall portion to a concave shape as shown in Fig. 4(f). The embodiment of Fig. 3 is made by using a contoured tool 48 working against a suitable anvil 49 as shown in Fig. 4(g). Can ends according to the invention may be made from aluminium or tinplate or other suitable sheet metals. WHAT WE CLAIM IS:
1. A can end having a peripheral cover hook, a chuck wall dependant from the cover hook, an annular central panel within the chuck wall and an openable portion within the central panel, the openable portion having a top panel bounded by a folded sidewall joined at a score line to a folded margin of the central panel around the openable portion, wherein the folded sidewall of the openable portion comprises an upper portion extending downwardly under and away from the top panel and a lower portion extending in a direction away from the inner periphery of the upper portion to the score line so that the upper and lower portions define a cavity into which a lever may be inserted to lever open the openable portion using the chuck wall as a fulcrum.
2. A can end according to claim 1 wherein the folded margin extends under the score line to define an aperture under the openable portion.
3. A can end according to claim 1 wherein the folded margin is located adjacent to and radially outside the score line.
4. A can end according to claim 3 claim wherein the openable portion is defined by a score line and a hinge portion extending between the ends of the score line.
5. A can end according to claim 4 wherein the top panel has a sloping shape rising in a direction away from the hinge towards a high sidewall portion opposite the hinge.
6. A method of making a can end according to any preceding claim, said method comprising the steps of stretching a portion of the central panel to raise an openable portion out of the plane of the panel; reshaping the stretched portion to have a top panel, a first sidewall portion dependant therefrom, an annular joining portion extending from the first sidewall portion to a second sidewall portion; collapsing the second sidewall portion to the form of an annular folded margin around the openable portion, scoring the upper surface of the folded margin to define the openable portion substantially within the annular folded margin of the can end; and reforming the first sidewall portion to include the upper and lower portions defining a cavity into which an instrument may be inserted to open the openable portion.
7. A method according to claim 6 wherein the upper surface of the folded portion is scored leaving an unscored hinge portion.
8. A method according to claim 7 wherein the first sidewall is only locally deformed to an instrument receiving cavity and the top panel is reformed to slope upwardly and outwardly from the hinge.
9. A can end substantially as hereinbefore described with reference to Fig. 2 of the accompanying drawings.
10. A can end substantially as hereinbefore described with reference to Fig. 3 of the accompanying drawings.
11. A method of making a can end substantially as hereinbefore described with reference to Figs. 2 to 4 of the accompanying drawings.
GB39877/76A
1977-09-22
1977-09-22
Containers
Expired
GB1590580A
(en)
Priority Applications (2)
Application Number
Priority Date
Filing Date
Title
GB39877/76A
GB1590580A
(en)
1977-09-22
1977-09-22
Containers
ES1977230976U
ES230976Y
(en)
1977-09-22
1977-09-23
BOAT.
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB39877/76A
GB1590580A
(en)
1977-09-22
1977-09-22
Containers
Publications (1)
Publication Number
Publication Date
GB1590580A
true
GB1590580A
(en)
1981-06-03
Family
ID=10411978
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB39877/76A
Expired
GB1590580A
(en)
1977-09-22
1977-09-22
Containers
Country Status (2)
Country
Link
ES
(1)
ES230976Y
(en)
GB
(1)
GB1590580A
(en)
Cited By (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2125761A
(en)
*
1982-06-22
1984-03-14
Schmalbach Lubeca
Tear-open end closures for beverage cans
EP0377788A1
(en)
*
1989-01-12
1990-07-18
QUAKER.CHIARI & FORTI S.P.A.
An easy-opening closure for the sheet metal lids of cans and the like
WO1993002932A1
(en)
*
1991-08-08
1993-02-18
The Broken Hill Proprietary Company Limited
Full open can end closure
WO1997043185A1
(en)
*
1996-05-10
1997-11-20
Pack-Tec International S.R.L.
Lid for containers such as tins and the like, having a double line of weakness
1977
1977-09-22
GB
GB39877/76A
patent/GB1590580A/en
not_active
Expired
1977-09-23
ES
ES1977230976U
patent/ES230976Y/en
not_active
Expired
Cited By (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2125761A
(en)
*
1982-06-22
1984-03-14
Schmalbach Lubeca
Tear-open end closures for beverage cans
EP0377788A1
(en)
*
1989-01-12
1990-07-18
QUAKER.CHIARI & FORTI S.P.A.
An easy-opening closure for the sheet metal lids of cans and the like
WO1993002932A1
(en)
*
1991-08-08
1993-02-18
The Broken Hill Proprietary Company Limited
Full open can end closure
WO1997043185A1
(en)
*
1996-05-10
1997-11-20
Pack-Tec International S.R.L.
Lid for containers such as tins and the like, having a double line of weakness
US6010025A
(en)
*
1996-05-10
2000-01-04
Pack-Tec International S.R.L.
Lid for containers such as tins and the like, having a double line of weakness
Also Published As
Publication number
Publication date
ES230976U
(en)
1978-03-01
ES230976Y
(en)
1978-07-01
Similar Documents
Publication
Publication Date
Title
US3765352A
(en)
1973-10-16
Combined can and end with means for protecting against severed score
US3924777A
(en)
1975-12-09
Non-detachable easy open flap and tab assembly
US4084721A
(en)
1978-04-18
Container with attached closure
US3307737A
(en)
1967-03-07
Attachment of an opener to the wall of a can
US3451367A
(en)
1969-06-24
Method of fabricating container-opening device
US3618815A
(en)
1971-11-09
Easy-opening device for a container end
US3938693A
(en)
1976-02-17
Non-detachable easy open flap and tab assembly
US3338463A
(en)
1967-08-29
Pull tab container opener
US2017460A
(en)
1935-10-15
Container and method of manufacture
US3303958A
(en)
1967-02-14
Container construction
US3295715A
(en)
1967-01-03
Metal container with central plastic straw
WO1988005405A1
(en)
1988-07-28
Disc removal end wall structure with safety features
US4052949A
(en)
1977-10-11
Method for making easy open container end with protective edges for its severed score
US4132328A
(en)
1979-01-02
Panel with opening means
US5875914A
(en)
1999-03-02
Container with integral endpiece and sealing member
US4258859A
(en)
1981-03-31
No-fin scored metal ends for containers
US3880316A
(en)
1975-04-29
Easy open push button ecology end
US3837524A
(en)
1974-09-24
Easy opening container wall
US3195764A
(en)
1965-07-20
Receptacle and opening means therefor
KR880000920B1
(en)
1988-05-31
Pull tab in a container
GB1590580A
(en)
1981-06-03
Containers
US5875911A
(en)
1999-03-02
Easy open container end with method of manufacture, and tooling
US3450300A
(en)
1969-06-17
Easy-open structure for containers
US3848557A
(en)
1974-11-19
Method for forming protective edge on easy opening container
US3220599A
(en)
1965-11-30
Receptacle and combined quick opening means
Legal Events
Date
Code
Title
Description
1981-09-03
PS
Patent sealed
1984-05-31
PCNP
Patent ceased through non-payment of renewal fee
