EP0144102B1 - A top end for a tin - Google Patents

A top end for a tin Download PDF

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Publication number
EP0144102B1
EP0144102B1 EP84201620A EP84201620A EP0144102B1 EP 0144102 B1 EP0144102 B1 EP 0144102B1 EP 84201620 A EP84201620 A EP 84201620A EP 84201620 A EP84201620 A EP 84201620A EP 0144102 B1 EP0144102 B1 EP 0144102B1
Authority
EP
European Patent Office
Prior art keywords
substantially flat
top end
tin
shaped portion
ring
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
Application number
EP84201620A
Other languages
German (de)
French (fr)
Other versions
EP0144102A1 (en
Inventor
Klaas Martens
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.)
Cooperatieve Condensfabriek "friesland" Wa
Original Assignee
Cooperatieve Condensfabriek "friesland" Wa
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=19842720&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0144102(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Cooperatieve Condensfabriek "friesland" Wa filed Critical Cooperatieve Condensfabriek "friesland" Wa
Priority to AT84201620T priority Critical patent/ATE43550T1/en
Publication of EP0144102A1 publication Critical patent/EP0144102A1/en
Application granted granted Critical
Publication of EP0144102B1 publication Critical patent/EP0144102B1/en
Expired legal-status Critical Current

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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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/06—Integral, or permanently secured, end or side closures
    • B65D17/08—Closures secured by folding or rolling and pressing
    • 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
    • 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
    • B65D7/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal
    • B65D7/12—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls
    • B65D7/34—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls with permanent connections between walls

Definitions

  • the invention relates to a closure end for a tin, can or similar container, provided with a circumferential rolled seaming edge surrounding an annular groove defining the perimeter of an end wall, said end wall being provided with a substantially flat, central, circular disc-shaped portion and at least one substantially flat, ring-shaped portion at the circumference of said disc-shaped portion, said substantially flat portions lying in planes at different levels, wherein the substantially flat, ring-shaped portion vicinal to the annular groove lies at a lower level than the rolled seaming edge and at a higher level than the adjacent inwards situated, substantially flat portion.
  • the closure end is only preferably provided with said outwardly directed bead, the inwardly directed bead is always there, the difference in height between the central parts of the closure end and the seaming edge thus being extremely large.
  • Such a strongly profiled closure end requires a lot of material and great pressure to press the closure end into said material.
  • little surface remains for captions, codes and/or information, while pressing the many deformations require complicated dies. Creating great pressing force, using extra material for the closure ends and the need for complicated dies increase the costs, which is an important disadvantage in a disposable product.
  • NL-C-72920 describes a closure end for a tin, can or similar container with a bead provided with undulations in order to attain extra stiffening of the bead, both bead and undulations serving to stiffen the closure end.
  • a bead with undulations requires complicated dies plus great pressing force and extra material for pressing the closure end, which results in increased costs, which is an important disadvantage in a disposable product.
  • closure end that can be manufactured at lower costs, which is an important asset for a disposable product.
  • the closure end should be sufficiently rigid to avoid bulging of the closure end when the closed tin, can or similar container is under such high pressure as would e.g. occur while sterilizing this container and its contents.
  • the invented closure end is characterized in that said annular groove lies directly adjacent to said vicinal, substantially flat, ring-shaped portion without bead between said groove and said portion, wherein said closure end may or may not have a tear line.
  • a flat portion of the top end wall a flat or nearly flat (slightly conical) surface is meant that is parallel to or nearly parallel to the surface in which the seaming edge is situated.
  • the top end according to the present invention has been especially designed for a tin with content which has to undergo a sterilization process.
  • the product with which the tin has to be filled is either at room temperature or cold, and will have about the same pressure after sterilizing as during the filling of the tin.
  • sterilizing pressures up to 2.5 atmospheres above atmospheric pressure arise inside the tin, so the top end has to be flexible, otherwise the seaming edge is overloaded, which may cause leakages.
  • the present invention covers a flexible top end which, with the same thickness of sheet metal as with the known top ends, offers a larger resistance against bulging out and lasting deformation than the known top ends. By selecting a smaller material thickness, material can be saved whereas the resistance against bulging out and lasting deformation is as with known top ends.
  • top end according to the invention can be made from a piece of material having a smaller surface, because it has less profiling than the top ends known.
  • the present top end may be used for tins containing all kinds of sterilized or non-sterilized products which cause no or little underpressure in the tin when the product is cooled down to at least-room temperature.
  • the top end according to fig. 1 and 2 has been provided with a circumfering groove 3 all round a ring-shaped flat surface 6 which is situated higher than the bottom of the circumfering groove 3, but lower than the top surface 4 of the seaming edge all round the circumfering groove.
  • the distance (e) between the back side of surface 6 and the bottom surface of the circumfering groove 3 amounts to at least one-sixth. five-sixth at the most and preferably between one-third and two- third of the total height of the lid (h).
  • a disc-shaped flat surface 2 is centrally situated within the ring-shaped surface 6 at a lower level with respect to said ring-shaped surface.
  • the width of the circumfering groove 3 has to be at least sufficient for receiving seaming implements in order to seam the seaming edge 5 onto a cylinder wall to, in this way, attach the top end to the cylinder wall for manufacturing a tin, can or similar container.
  • FIG. 3 and 4 another modification of the top end according to the present invention is shown, in which the only difference with respect to the modification according to figures 1 and 2 is that between the central surface 2 and the ring-shaped surface 6 adjacent to the circumfering groove a third flat surface 7 is present.
  • This third surface 7 is situated lower than the ring-shaped surface 6 adjacent to the circumfering groove 3, whereas the central surface 2 may be situated higher than the third surface 7 as is indicated in fig. 4 with a line drawn, but the central surface 2 may also be situated lower than the third surface 7 as is indicated by a dotted line in fig. 4.
  • top ends according to the present invention may be made of thin sheet metal, such as tin plate, electrolytically chromium coated steel (ECCS) or aluminium.
  • thin sheet metal such as tin plate, electrolytically chromium coated steel (ECCS) or aluminium.
  • the flat surfaces 2, 6 and 7 may also be slightly cone-shaped and/or may be provided with pouring indents, impressed inscriptions, rupture lines, pull tabs and/or pull rings which are known per se and therefore have not been indicated in the drawing.
  • top end may be used as a bottom end as well for manufacturing a tin, can or similar container.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)

Abstract

A top end for a tin, can or similar container, provided witn a seaming edge (5) all round a circumfering groove (3) surrounding the actual wall of the top end, the improvement being that the actual wall of the top end is provided with a central, at least substantially flat portion (2), and with at least one circumfering, at least substantially flat portion (6, 7) all around the central flat portion (2), said flat portion being all situated at mutually different levels.

Description

  • The invention relates to a closure end for a tin, can or similar container, provided with a circumferential rolled seaming edge surrounding an annular groove defining the perimeter of an end wall, said end wall being provided with a substantially flat, central, circular disc-shaped portion and at least one substantially flat, ring-shaped portion at the circumference of said disc-shaped portion, said substantially flat portions lying in planes at different levels, wherein the substantially flat, ring-shaped portion vicinal to the annular groove lies at a lower level than the rolled seaming edge and at a higher level than the adjacent inwards situated, substantially flat portion.
  • This closure end for a tin is disclosed in US-A--2 119 533 and for that reason the preamble of the pertaining claim reflects the features known from that publication. However, this known closure end is provided with an annular groove that is deeper than usual, so that US-A-2 119 533 provides an annular groove deepened by an inwardly directed bead, which bead connects direct and around to an outwardly directed bead at the circumference of a flat, ringshaped portion surrounding a flat, central, circular disc-shaped portion at a lower level than the ring-shaped portion. Both said beads serve to provide rigidity to the closure end. Although the closure end is only preferably provided with said outwardly directed bead, the inwardly directed bead is always there, the difference in height between the central parts of the closure end and the seaming edge thus being extremely large. Such a strongly profiled closure end requires a lot of material and great pressure to press the closure end into said material. Moreover, due to the many deformations in the closure end, little surface remains for captions, codes and/or information, while pressing the many deformations require complicated dies. Creating great pressing force, using extra material for the closure ends and the need for complicated dies increase the costs, which is an important disadvantage in a disposable product.
  • Furthermore NL-C-72920 describes a closure end for a tin, can or similar container with a bead provided with undulations in order to attain extra stiffening of the bead, both bead and undulations serving to stiffen the closure end. Such a bead with undulations requires complicated dies plus great pressing force and extra material for pressing the closure end, which results in increased costs, which is an important disadvantage in a disposable product.
  • It is the aim of the invention to provide a closure end that can be manufactured at lower costs, which is an important asset for a disposable product. However, the closure end should be sufficiently rigid to avoid bulging of the closure end when the closed tin, can or similar container is under such high pressure as would e.g. occur while sterilizing this container and its contents.
  • While the above-mentioned US-A-2 119 533 and NL-C-72 920 propose complicated beads so as to avoid bulging, it has now been invented that bulging can be avoided without these cost- increasing beads.
  • For that purpose the invented closure end is characterized in that said annular groove lies directly adjacent to said vicinal, substantially flat, ring-shaped portion without bead between said groove and said portion, wherein said closure end may or may not have a tear line.
  • By a flat portion of the top end wall a flat or nearly flat (slightly conical) surface is meant that is parallel to or nearly parallel to the surface in which the seaming edge is situated.
  • The top end according to the present invention has been especially designed for a tin with content which has to undergo a sterilization process. The product with which the tin has to be filled, is either at room temperature or cold, and will have about the same pressure after sterilizing as during the filling of the tin. During sterilizing pressures up to 2.5 atmospheres above atmospheric pressure arise inside the tin, so the top end has to be flexible, otherwise the seaming edge is overloaded, which may cause leakages.
  • The present invention covers a flexible top end which, with the same thickness of sheet metal as with the known top ends, offers a larger resistance against bulging out and lasting deformation than the known top ends. By selecting a smaller material thickness, material can be saved whereas the resistance against bulging out and lasting deformation is as with known top ends.
  • Further saving of material is obtained because the top end according to the invention can be made from a piece of material having a smaller surface, because it has less profiling than the top ends known.
  • Moreover, on the top end invented there are flat surfaces of sufficient size for applying information, such as batch codes, dates etc., for example by diepressing, imprinting and the like.
  • Other small unevenesses, such as prepressed indents for the sake of opening the tin (pouring indents), impressed logos and the like can be present on these flat surfaces. Furthermore, means known per se for opening tins without tools such as a pull ring and a pull tab, can be present in these flat surfaces.
  • The present top end may be used for tins containing all kinds of sterilized or non-sterilized products which cause no or little underpressure in the tin when the product is cooled down to at least-room temperature.
  • And, finally, the ring-shaped and disc-shaped flat surfaces of the top end give the tin a nice appearance.
  • The invention will now be elucidated with the help of the appended drawing.
    • Fig. 1 is plan view of a top end according to the present invention in a modification having two concentric flat surfaces.
    • Fig. 2 is a cross section of the top end along the line II-II in fig. 1.
    • Fig. 3 is a plan view of a top end according to the present invention in a modification having three concentric flat surfaces.
    • Fig. 4 is a cross section of the top end according to the line IV-IV in fig. 3.
  • The top end according to fig. 1 and 2 has been provided with a circumfering groove 3 all round a ring-shaped flat surface 6 which is situated higher than the bottom of the circumfering groove 3, but lower than the top surface 4 of the seaming edge all round the circumfering groove. The distance (e) between the back side of surface 6 and the bottom surface of the circumfering groove 3 amounts to at least one-sixth. five-sixth at the most and preferably between one-third and two- third of the total height of the lid (h).
  • A disc-shaped flat surface 2 is centrally situated within the ring-shaped surface 6 at a lower level with respect to said ring-shaped surface.
  • The width of the circumfering groove 3 has to be at least sufficient for receiving seaming implements in order to seam the seaming edge 5 onto a cylinder wall to, in this way, attach the top end to the cylinder wall for manufacturing a tin, can or similar container.
  • In fig. 3 and 4 another modification of the top end according to the present invention is shown, in which the only difference with respect to the modification according to figures 1 and 2 is that between the central surface 2 and the ring-shaped surface 6 adjacent to the circumfering groove a third flat surface 7 is present. This third surface 7 is situated lower than the ring-shaped surface 6 adjacent to the circumfering groove 3, whereas the central surface 2 may be situated higher than the third surface 7 as is indicated in fig. 4 with a line drawn, but the central surface 2 may also be situated lower than the third surface 7 as is indicated by a dotted line in fig. 4.
  • The top ends according to the present invention may be made of thin sheet metal, such as tin plate, electrolytically chromium coated steel (ECCS) or aluminium.
  • The flat surfaces 2, 6 and 7 may also be slightly cone-shaped and/or may be provided with pouring indents, impressed inscriptions, rupture lines, pull tabs and/or pull rings which are known per se and therefore have not been indicated in the drawing.
  • It is obvious also that the invented and claimed top end may be used as a bottom end as well for manufacturing a tin, can or similar container.

Claims (1)

  1. A closure end for a tin, can or similar container, provided with a circumferential rolled seaming edge (5) surrounding an annular groove (3) defining the perimeter of an end wall, said end wall being provided with a substantially flat, central, circular disc-shaped portion (2) and at least one substantially flat, ring-shaped portion (6, 7) at the circumferance of said disc-shaped portion (2), said substantially flat portions lying in planes at different levels, wherein the substantially flat, ring-shaped portion (6) vicinal to the annular groove (3) lies at a lower level than the rolled seaming edge (5) and at a higher level than the adjacent inwards situated, sbsuantially flat portion (2 or 7), characterized in that said annular groove (3) lies directly adjacent to said vicinal, substantially flat, ring-shaped portion (6) without bead between said groove (3) and said portion (6), wherein said closure end may or may not have a tear line.
EP84201620A 1983-11-16 1984-11-09 A top end for a tin Expired EP0144102B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84201620T ATE43550T1 (en) 1983-11-16 1984-11-09 LID FOR A CAN.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8303931 1983-11-16
NL8303931A NL8303931A (en) 1983-11-16 1983-11-16 SIDE LID FOR SERVER BUSHING.

Publications (2)

Publication Number Publication Date
EP0144102A1 EP0144102A1 (en) 1985-06-12
EP0144102B1 true EP0144102B1 (en) 1989-05-31

Family

ID=19842720

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84201620A Expired EP0144102B1 (en) 1983-11-16 1984-11-09 A top end for a tin

Country Status (5)

Country Link
EP (1) EP0144102B1 (en)
AT (1) ATE43550T1 (en)
CA (1) CA1236781A (en)
DE (1) DE3478427D1 (en)
NL (1) NL8303931A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005024219B3 (en) * 2005-05-25 2006-07-13 Ball Packaging Europe Gmbh Lid with surround to connect it to container using guide columns or pins jutting out vertically from lid which can be used to hold other parts if required

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL72920C (en) * 1900-01-01
US2119533A (en) * 1937-05-10 1938-06-07 Continental Can Co Easy opening container
GB1091194A (en) * 1964-01-23 1967-11-15 Carnation Co Improvements in snap end metal cans
US3912109A (en) * 1973-11-15 1975-10-14 American Can Co Metal container and method for making same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005024219B3 (en) * 2005-05-25 2006-07-13 Ball Packaging Europe Gmbh Lid with surround to connect it to container using guide columns or pins jutting out vertically from lid which can be used to hold other parts if required

Also Published As

Publication number Publication date
DE3478427D1 (en) 1989-07-06
NL8303931A (en) 1985-06-17
EP0144102A1 (en) 1985-06-12
ATE43550T1 (en) 1989-06-15
CA1236781A (en) 1988-05-17

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