CA1042840A - Concerning plastics material lids for and closing containers - Google Patents
Concerning plastics material lids for and closing containersInfo
- Publication number
- CA1042840A CA1042840A CA207,390A CA207390A CA1042840A CA 1042840 A CA1042840 A CA 1042840A CA 207390 A CA207390 A CA 207390A CA 1042840 A CA1042840 A CA 1042840A
- Authority
- CA
- Canada
- Prior art keywords
- lid
- region
- container
- line
- weakening
- 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
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
- B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
- B65D77/10—Container closures formed after filling
- B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
- B65D77/2004—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being maintained on the container by mechanical means, e.g. crimping, clamping, riveting
- B65D77/2012—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being maintained on the container by mechanical means, e.g. crimping, clamping, riveting the cover being crimped or folded over the container flange
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
- B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
- B65D17/401—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall
- B65D17/4011—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall for opening completely by means of a tearing tab
-
- 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
- B65D17/52—Attachment of opening tools, e.g. slotted keys, to containers
- B65D17/521—Attached can-cutting devices
-
- 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
- B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
- B65D2577/10—Container closures formed after filling
- B65D2577/20—Container closures formed after filling by applying separate lids or covers
- B65D2577/2008—Rigid cutting or tearing devices
-
- 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
- B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
- B65D2577/10—Container closures formed after filling
- B65D2577/20—Container closures formed after filling by applying separate lids or covers
- B65D2577/2041—Pull tabs
- B65D2577/205—Pull tabs integral with the closure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
- B65D2577/10—Container closures formed after filling
- B65D2577/20—Container closures formed after filling by applying separate lids or covers
- B65D2577/2075—Lines of weakness or apertures
- B65D2577/2091—Lines of weakness or apertures in cover
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Closures For Containers (AREA)
- Closing Of Containers (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The present invention relates to a novel type of lid to be attached to containers. This lid is formed of plastic and is securably attached to the top of the container by a rim portion extending over the sides of the container. The panel has a line of weakening thereon which may be broken through use of a means attached to the lid which when moved in a direction at right angles to the lid causes the line of weakening to break and the lid to be opened along the line. Access may then be had to the interior of the container.
The present invention relates to a novel type of lid to be attached to containers. This lid is formed of plastic and is securably attached to the top of the container by a rim portion extending over the sides of the container. The panel has a line of weakening thereon which may be broken through use of a means attached to the lid which when moved in a direction at right angles to the lid causes the line of weakening to break and the lid to be opened along the line. Access may then be had to the interior of the container.
Description
~ \~
1~4Z84~
This invention concerns plastics material lids for containers.
Today, plastics material containers which are thermo- ~-form~d from sheet material are in extensive use, for con-taining foodstuffs such as cream, yoghurt, mousse and ice cream. These containers always have lids, but generally speaking are lidded either with metallic foil or waxed cardboard. The utilization of different materials for lid/lidding and container i8 an inconvenience because this u#ually involves two suppliers This invention i8 concorned with providing plastics material lids whereby at least the said inconvenience, where the lids are u~ed with plastics material containers, can be overcome.
According to the present invention, there i~ provided n lid for a cpntainer, comprising a body which i8 moulded in that it is thermoformed from plastics sheet material and which has a top panel having a rim adapting the body to be s~cured to a container top, said top panel having a region thereof defined by a line of weakening and the lid including means in addition to the body and not moulded integrally therewith for facilitating the application of force to a part of said region and in a direction generally at right angles to the panel, to enable tearing along said line of weakening to permit access to a container closed by the lid, characterised in that the body is of circular form, and ~aid region is of circular form and i8 surrounded by a rim portion for remaining connected to the container when said rogion is removed or flexed back, and said region has a raised horse-shoe shaped portion whose outer edge lieq close -~
to said line of weakening and said means for facilitating fracture comprises a pull tab having a portion which can be gripped by the fingers lying between the limbs of the said hors~-~hoe portion and another portion connected to the said region.
By the expression ~thermoformed from plastics sheet"
as usod herein and in the appended claim is meant forming . ~; ''.
~ ~ .
1~:34284V
the sheet when heated by means of vacuum, fluid under pressure (with or without plug assist) or mechanical forming or a combination of these methods.
An embodiment of the present invention will now be described, by way of example, with reference to the drawings accompanying the provisional specification, wherein:-Figs. 1 and 2 respectively show in perspective andsectional side elevation a lid according to the embodiment of the invention~ and Figs. 3, 4 and S, show in sectional elevation, three ~teps in carrying out a method of applying a lid to a container.
Referring to the drawings, Figs. 1 and 2 show a circular lid for an appropriately shaped circular sectioned container (not shown). The lid basically comprises a body having a top panel and a downwardly directed peripheral flange. The body is thermoformed from plastics material sheet.
The body panel is indicated by numeral 22 and the body has a flange 24 and has a line of weakening 26 which is circular and concentric with the circular form of the panel ; 22. Within the region defined by the line 26 there is moulded a raised horse shoe shaped portion 28 the centre of which lies centrally of the panel 22, and the outer ledge lies close to line 26. A snap 30 is adhered to the top panel 22 within the region defined by line 26 such that an edge thereof lies between the arms of the horse shoe shaped portion 28 and such that the thumb can be slipped under this edge in order to grasp the tab 30 which has a pointed end 32 lying adjacent the line 26, and pivot it so that it acts as a lever in order to form an initial fracture in the line 26 adjacent the point 32 whereby the whole of the section within line 26 can subsequently be removed. The tab 30 may be applied to the panel 22 by any suitable means such a~ adhesive or ultrasonic welding or a combination of such means. If reference is made to Fig. 2, it will be seen that the line 26 is in fact defined by a cutting through the i,~ ,~ .
.. .. ~,, . : . ,............. ~
1(~4Z840 thicknes~ of the sheet material from which the lid is formed.
After the formation of the bodies of the lids, the line of weakening subsequently is put into the top panels and then the tabs 30 are applied and then the lids are 5 removed from the sheet stock in which they are formed.
It will be noticed that the body is fractured along the line of weakening by the application of force, through the means 30 which is in a direction substantially at right angles to panel 22.
It is not necessary that the lid 3 be provided with the flange 24. This flange could be omitted and the lid could be applied where appropriate, and where the materials permit, to the container by the use of adhesive or by the use of wolding or by a combination of both techniques.
The lid as described can be crimped or clinched onto a top peripheral flange of an appropriate containers. An example of such application is illustrated in Figs. 3, 4 and 5. In these Figs., a container is indicated by numeral 48 whilst the lid is indicated by numeral 50. ~ach of these drawings is a sectional drawing showing only part of the container and lid but it is sufficient to show the method of operation. It will be seen that the lid 50 is placed over the container 48, which has a top peripheral and out~
w~rdly extending flange 52, such that the downwardly ext-ending flange 54 of the lid surrounds flange 52. The flanges 54 and 52 lie within a forming ring 56 having a circumfer-~ ential shoulder 58 of which the bottom is curved as shown.
- Overhead there is provided a pressing die 60 having a peripheral face 62 which is adapted to press the outer surface of the lid 50 onto the flange 52. A heater 64 is attached to the ring 56 so as to cause the transfer to heat ; through the ring to the flange 54 which is deformed during the subsequent operation.
; With the flange heated to appropriate temperature the ~ ~
die 60 is lowered as indic ted by arrow 66 in Fig. 3 thereby .. ..
. .
. - - - : - - - ~ . . .
... . . ~ .... . . , - . .
1~4Z840 pressing the flange 54 axially towards the rounded bottom of shoulder 58. This causes the flange, now reasonably soft, to turn inwards as shown in Fig. 4 and eventually, when downward movement of die 60 is complete, to be clinched under and round the flange 52 thereby securing the lid 50 firmly to the container.
. ' .;
' '
1~4Z84~
This invention concerns plastics material lids for containers.
Today, plastics material containers which are thermo- ~-form~d from sheet material are in extensive use, for con-taining foodstuffs such as cream, yoghurt, mousse and ice cream. These containers always have lids, but generally speaking are lidded either with metallic foil or waxed cardboard. The utilization of different materials for lid/lidding and container i8 an inconvenience because this u#ually involves two suppliers This invention i8 concorned with providing plastics material lids whereby at least the said inconvenience, where the lids are u~ed with plastics material containers, can be overcome.
According to the present invention, there i~ provided n lid for a cpntainer, comprising a body which i8 moulded in that it is thermoformed from plastics sheet material and which has a top panel having a rim adapting the body to be s~cured to a container top, said top panel having a region thereof defined by a line of weakening and the lid including means in addition to the body and not moulded integrally therewith for facilitating the application of force to a part of said region and in a direction generally at right angles to the panel, to enable tearing along said line of weakening to permit access to a container closed by the lid, characterised in that the body is of circular form, and ~aid region is of circular form and i8 surrounded by a rim portion for remaining connected to the container when said rogion is removed or flexed back, and said region has a raised horse-shoe shaped portion whose outer edge lieq close -~
to said line of weakening and said means for facilitating fracture comprises a pull tab having a portion which can be gripped by the fingers lying between the limbs of the said hors~-~hoe portion and another portion connected to the said region.
By the expression ~thermoformed from plastics sheet"
as usod herein and in the appended claim is meant forming . ~; ''.
~ ~ .
1~:34284V
the sheet when heated by means of vacuum, fluid under pressure (with or without plug assist) or mechanical forming or a combination of these methods.
An embodiment of the present invention will now be described, by way of example, with reference to the drawings accompanying the provisional specification, wherein:-Figs. 1 and 2 respectively show in perspective andsectional side elevation a lid according to the embodiment of the invention~ and Figs. 3, 4 and S, show in sectional elevation, three ~teps in carrying out a method of applying a lid to a container.
Referring to the drawings, Figs. 1 and 2 show a circular lid for an appropriately shaped circular sectioned container (not shown). The lid basically comprises a body having a top panel and a downwardly directed peripheral flange. The body is thermoformed from plastics material sheet.
The body panel is indicated by numeral 22 and the body has a flange 24 and has a line of weakening 26 which is circular and concentric with the circular form of the panel ; 22. Within the region defined by the line 26 there is moulded a raised horse shoe shaped portion 28 the centre of which lies centrally of the panel 22, and the outer ledge lies close to line 26. A snap 30 is adhered to the top panel 22 within the region defined by line 26 such that an edge thereof lies between the arms of the horse shoe shaped portion 28 and such that the thumb can be slipped under this edge in order to grasp the tab 30 which has a pointed end 32 lying adjacent the line 26, and pivot it so that it acts as a lever in order to form an initial fracture in the line 26 adjacent the point 32 whereby the whole of the section within line 26 can subsequently be removed. The tab 30 may be applied to the panel 22 by any suitable means such a~ adhesive or ultrasonic welding or a combination of such means. If reference is made to Fig. 2, it will be seen that the line 26 is in fact defined by a cutting through the i,~ ,~ .
.. .. ~,, . : . ,............. ~
1(~4Z840 thicknes~ of the sheet material from which the lid is formed.
After the formation of the bodies of the lids, the line of weakening subsequently is put into the top panels and then the tabs 30 are applied and then the lids are 5 removed from the sheet stock in which they are formed.
It will be noticed that the body is fractured along the line of weakening by the application of force, through the means 30 which is in a direction substantially at right angles to panel 22.
It is not necessary that the lid 3 be provided with the flange 24. This flange could be omitted and the lid could be applied where appropriate, and where the materials permit, to the container by the use of adhesive or by the use of wolding or by a combination of both techniques.
The lid as described can be crimped or clinched onto a top peripheral flange of an appropriate containers. An example of such application is illustrated in Figs. 3, 4 and 5. In these Figs., a container is indicated by numeral 48 whilst the lid is indicated by numeral 50. ~ach of these drawings is a sectional drawing showing only part of the container and lid but it is sufficient to show the method of operation. It will be seen that the lid 50 is placed over the container 48, which has a top peripheral and out~
w~rdly extending flange 52, such that the downwardly ext-ending flange 54 of the lid surrounds flange 52. The flanges 54 and 52 lie within a forming ring 56 having a circumfer-~ ential shoulder 58 of which the bottom is curved as shown.
- Overhead there is provided a pressing die 60 having a peripheral face 62 which is adapted to press the outer surface of the lid 50 onto the flange 52. A heater 64 is attached to the ring 56 so as to cause the transfer to heat ; through the ring to the flange 54 which is deformed during the subsequent operation.
; With the flange heated to appropriate temperature the ~ ~
die 60 is lowered as indic ted by arrow 66 in Fig. 3 thereby .. ..
. .
. - - - : - - - ~ . . .
... . . ~ .... . . , - . .
1~4Z840 pressing the flange 54 axially towards the rounded bottom of shoulder 58. This causes the flange, now reasonably soft, to turn inwards as shown in Fig. 4 and eventually, when downward movement of die 60 is complete, to be clinched under and round the flange 52 thereby securing the lid 50 firmly to the container.
. ' .;
' '
Claims
1. A lid for a container, comprising a body which is moulded in that it is thermoformed from plastics sheet material and which has a top panel having a rim adapting the body to be secured to a container top, said top panel having a region thereof defined by a line of weakening and the lid including means in addition to the body and not mounted integrally therewith for facilitating the application of force to a part of said region and in a direction generally at right angles to the panel, to enable tearing along said line of weakening to permit access to a container closed by the lid, characterised in that the body is of circular form, and said region is of circular form and is surrounded by a rim portion for remaining connected to the container when said region is removed or flexed back, and said region has a raised horse-shoe shaped portion whose outer edge lies close to said line of weakening and said means for facilitating fracture comprises a pull tab having a portion which can be gripped by the fingers lying between the limbs of the said horse-shoe portion and another portion connected to the said region.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3945573A GB1477828A (en) | 1973-08-21 | 1973-08-21 | Plastics material lids for and closing containers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1042840A true CA1042840A (en) | 1978-11-21 |
Family
ID=10409645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA207,390A Expired CA1042840A (en) | 1973-08-21 | 1974-08-20 | Concerning plastics material lids for and closing containers |
Country Status (10)
| Country | Link |
|---|---|
| BE (1) | BE819064A (en) |
| BR (1) | BR7406927D0 (en) |
| CA (1) | CA1042840A (en) |
| DE (1) | DE7428180U (en) |
| DK (2) | DK445074A (en) |
| FR (1) | FR2241466A1 (en) |
| GB (2) | GB1477828A (en) |
| IT (1) | IT1018471B (en) |
| SE (1) | SE7410548L (en) |
| ZA (1) | ZA745327B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES527304A0 (en) * | 1981-03-27 | 1984-07-16 | Erca Holding | A PROCEDURE FOR PREPARING PIRIMIDONE DERIVATIVES. |
| FR2502590A1 (en) * | 1981-03-27 | 1982-10-01 | Erca | Pull-tab opening for container lid - has piercing end and lifting end with interposed fulcrum axis fixed to lid |
| DE29509207U1 (en) * | 1995-06-03 | 1995-08-24 | Carnaudmetalbox S.A., Paris | Sheet metal packaging container and manufacturing tool |
| DE202007004211U1 (en) * | 2007-03-19 | 2007-06-28 | Teekanne Gmbh & Co. Kg | Portion packaging, for brewing tea and the like, has an initial sealed container to hold the tea fitting into a surrounding packaging which can be dispensed from a magazine |
| GB2576928B (en) * | 2018-09-07 | 2020-12-16 | Mcnicholas Sean | A pressurized beverage container with a releasable section and a removable lid |
-
1973
- 1973-08-21 GB GB3945573A patent/GB1477828A/en not_active Expired
- 1973-08-21 GB GB42376A patent/GB1477829A/en not_active Expired
-
1974
- 1974-08-20 DK DK445074A patent/DK445074A/da not_active Application Discontinuation
- 1974-08-20 SE SE7410548A patent/SE7410548L/xx unknown
- 1974-08-20 ZA ZA00745327A patent/ZA745327B/en unknown
- 1974-08-20 CA CA207,390A patent/CA1042840A/en not_active Expired
- 1974-08-20 DE DE7428180U patent/DE7428180U/en not_active Expired
- 1974-08-21 BR BR6927/74A patent/BR7406927D0/en unknown
- 1974-08-21 IT IT83388/74A patent/IT1018471B/en active
- 1974-08-21 FR FR7428662A patent/FR2241466A1/fr not_active Withdrawn
- 1974-08-21 BE BE147801A patent/BE819064A/en unknown
-
1975
- 1975-12-10 DK DK561975A patent/DK561975A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| IT1018471B (en) | 1977-09-30 |
| GB1477829A (en) | 1977-06-29 |
| FR2241466A1 (en) | 1975-03-21 |
| DK561975A (en) | 1975-12-10 |
| BE819064A (en) | 1974-12-16 |
| GB1477828A (en) | 1977-06-29 |
| BR7406927D0 (en) | 1975-08-26 |
| AU7251774A (en) | 1976-02-26 |
| DK445074A (en) | 1975-04-28 |
| ZA745327B (en) | 1976-03-31 |
| DE7428180U (en) | 1974-12-05 |
| SE7410548L (en) | 1975-02-24 |
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