GB2274278A - Closure with vacuum breaking seal - Google Patents
Closure with vacuum breaking seal Download PDFInfo
- Publication number
- GB2274278A GB2274278A GB9315777A GB9315777A GB2274278A GB 2274278 A GB2274278 A GB 2274278A GB 9315777 A GB9315777 A GB 9315777A GB 9315777 A GB9315777 A GB 9315777A GB 2274278 A GB2274278 A GB 2274278A
- Authority
- GB
- United Kingdom
- Prior art keywords
- orifice
- membrane
- seal
- lid
- resinous material
- 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.)
- Granted
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 48
- 239000002184 metal Substances 0.000 claims abstract description 48
- 239000012260 resinous material Substances 0.000 claims abstract description 26
- 239000012528 membrane Substances 0.000 claims abstract description 23
- 235000013305 food Nutrition 0.000 claims abstract description 15
- 238000007711 solidification Methods 0.000 claims abstract description 4
- 230000008023 solidification Effects 0.000 claims abstract description 4
- 238000004073 vulcanization Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 239000004411 aluminium Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 5
- 239000011521 glass Substances 0.000 abstract description 15
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 239000002245 particle Substances 0.000 abstract 1
- 238000004806 packaging method and process Methods 0.000 description 39
- 229920001944 Plastisol Polymers 0.000 description 12
- 239000000463 material Substances 0.000 description 12
- 239000004999 plastisol Substances 0.000 description 12
- 239000002966 varnish Substances 0.000 description 9
- 239000007788 liquid Substances 0.000 description 8
- 230000004927 fusion Effects 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000000605 extraction Methods 0.000 description 5
- 230000008030 elimination Effects 0.000 description 4
- 238000003379 elimination reaction Methods 0.000 description 4
- 210000004905 finger nail Anatomy 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229920001169 thermoplastic Polymers 0.000 description 3
- 239000004416 thermosoftening plastic Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000009461 vacuum packaging Methods 0.000 description 1
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
- B65D51/16—Closures not otherwise provided for with means for venting air or gas
- B65D51/1672—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by manual actuation of the closure or other element
- B65D51/1677—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by manual actuation of the closure or other element by rupturing a portion of 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
- B65D55/00—Accessories for container closures not otherwise provided for
- B65D55/02—Locking devices; Means for discouraging or indicating unauthorised opening or removal of closure
- B65D55/024—Closures in which a part has to be ruptured to gain access to the contents
-
- 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
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/18—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
- B65D81/20—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
- Packages (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Vacuum Packaging (AREA)
Abstract
A metal cap comprises a panel 1 having a depression 4 with a vacuum breaking orifice 6 sealed on its underside by a membrane 10 of resinous material and on its upper surface by resinous material connected to the membrane through orifice 6 together forming a detachable seal 5. The resinous material is applied in the molten state in the region of the depression 4 such that it penetrates orifice 6 where it bonds forming a shank 11 to the membrane 10. Adhesion and solidification to the resinous material is effected eg by vulcanisation. The cap also comprises depending peripheral wall 2, a top wall and a plate particles 1, an annular recess being formed between the peripheral wall 2 and the plate 1 in which is located a closure gasket 3 of resinous material. The seal cannot be reglued in place and is thus tamper indicating. It is suitable for use with thin walled glass jars with no top flanges and containing food. <IMAGE>
Description
EASY OPENING METAL LID FOR VACUUM-SEALING JARS AND OTHER
PACKAGINGS FOR FOOD PRESERVES AND ITS PROCESS OF MANUFACTURE
This invention relates to a metal lid provided with a means of opening which facilitates its removal.
This type of lid is especially intended for vacuum packagings such as glass jars and other packagings for food preserves.
This lid is provided with a pressure-release orifice that is closed by a detachable seal which is extracted for example with the aid of the fingernail, thus causing the seal to become detached from the pressure-release opening and, as a result, the destruction of the vacuum that exists inside the packaging which frees the lid and detaches it without requiring a great effort or the use of an instrument in order to effect opening.
The purpose of the metal lid provided with a pressure release orifice with a detachable seal as per this invention is to enable the packaging to be opened easily without the aid of an ancillary instrument or implement.
Its use under vacuum for glass jars or other packaging containers for food products is especially suitable for preserves placed in the packaging at a high temperature the sealing of which packaging is effected by the use of jets of steam which leads, after the product has been cooled and after the steam injected into and contained in the containers has condensed, to the formation of the vacuum which hoids the lid in place and hermetically seals packagings of this type.
This type of metal lid in its original form, that is to say without an easy means of opening, is already in use today for closing jars and other glass containers that are useful for packaging food products. However, their closure is effected by fitting the lid and container together which requires the use cf special chucks. Furthermore, this system of closure requires the use of glass jars with excessively thick walls without which they would not be able to withstand the blows of the chuck. The jars also need to be provided with a shoulder or flange that projects from their upper shoulders so that they mate with the edge or skirt of the lid when they are being fitted together.
The result is that this system is not economical due to the fact that it requires the use of à larger quantity of material for the manufacture of the jars and that, on the other hand, these jars are crude in appearance and that they are unsuitable for subsequent use as jars for domestic use.
The metal lid, on which the provision of a pressure release orifice is envisaged that is provided with a detachable seal in the form of a button and the extraction of which, with the aid of one's fingernail, enables the packaging to be opened easily by detaching the said lid, comprises in its known original form a cap made from tinned sheet metal or aluminium and usually takes the form of a circular panel provided with a short edge or descending skirt. Near the internal periphery of this border the cap has a circular neck with a closure gasket made of a resinous material such as plastisol or similar. This lid rests on the opening of the jar or the other packaging container with the said gasket interposed between them. This lid is known in its original form and is not the object of this invention.
This type of metal lid in its known form described above is used for closing glass jars, but in order to open it, the use of a pointed implement, such as a knife, is required.
By introducing the point of the latter under the edge or skirt of the lid all around its contour it can be detached, which enables the said edge or skirt to be removed by withdrawing it from the flange all round the contour of the jar. This operation is relatively difficult and frequently causes injury to the hands.
For the purpose of facilitating the opening of these packagings, such as glass jars or similar, that are sealed under vacuum by metal lids, without the use of an ancillary instrument, this new metal lid has been created that is provided with a pressure release opening with a detachable seal. Thanks to its special manufacturing and design characteristics, that are the object of this invention, this lid, apart from its easy opening, provides a guarantee against tampering due to the fact that after the seal has been extracted from the pressure release opening, and after the vacuum inside the packaging has been eliminated, the lid cannot be replaced on the packaging, as the process by which the adherence of the said seal is obtained does not permit it to be replaced.The lid therefore remains detached due to the absence of the vacuum which immediately shows that the packaging has been tampered with.
The idea that forms the object of this invention conslsts essentially of providing a metal lid made of tinned sheet metal or aluminium that is provided with a pressure release opening, pierced preferably in a central point of the panel of the lid and in a region that takes the form of a basin.
The said orifice is sealed with a detachable seal in the form of a button, made from resinous material such as plastisol or similar, the said material being applied in the liquid and molten state. Requiring the prior application of a thin circular film on the internal surface round the opening, the said film being made from the same resinous material forming the seal, solidification and adhesion are obtained by vulcanisation.
The seal and the film applied on the inner and lower section of the pressure release opening bond together and form a single integral part providing complete and effective protection at the edge of the opening that is formed by extracting a small disc of the metal sheet that forms the panel of the lid, especially if the latter is made from tinned sheet metal. This protection prevents the erosion of the sheet metal by acid or salt substances in the products contained in these packagings.Furthermore, this method of manufacturing the seal, in which the resinous material is applied in the molten state1 after the film has sealed the lower section of the orifice, prevents the said material from running through the orifice and the formation of residues or drips on the lower section of the lid, that is to say on the inside of the packaging, which could impair the complete freeing of the orifice when extracting the seal in order to free and detach the lid held in place by the action of the vacuum.
In order to better understand the advantages of the invention when metal lids made of tinned sheet metal (i.e.
strips of iron coated with tin) are used for closing preserves packagings, these lids must be coated with special hygiene varnish on their inner surface in order to prevent the food product from coming into contact with the metal wall and to prevent the erosion of metal by oxidation (rust).
When the orifice on the lid panel is pierced by extracting a small disc, this protection is removed at the point where the hole has been made.
The application of the film of resinous material seals the orifice on its inner section and provides protection for this section that lacks hygiene varnish. Because the orifice has been sealed on its lower section, when the resinous material (plastisol) is applied in the liquid state to the area in the form of a basin to form the seal, this material is prevented from running through the orifice and even the undesirable formation of drips or residues is prevented that could impair the complete freeing of the pressure release orifice.
The new metal lid provided with a pressure release opening with a detachable seal that can be easily opened and is designed to vacuum seal jars and other packagings for food products as well as a process for its manufacture are shown in the following drawings whereby - Fig. 1 - is a side view in diametric section which shows the metal lid provided with a pressure release orifice with a detachable seal, the said lid being applied, for the purposes of vacuum sealing, to the upper edge of a packaging jar filled with a product; - Fig. 2 - is the same side view in diametric section which shows the metal lid when the seal is being extracted from the pressure release orifice and the elimination or suppression of the vacuum that exists inside the packaging; - Fig. 3 - is the same side view in diametric section which shows the metal lid already freed from the packaging jar:: - Fig. 4 - is a view of the upper section of the metal lid provided with a pressure release orifice and a detachable seal; - Fig. 5 - is a cutaway view which shows an enlarged central region of the metal lid panel in which the pressure release orifice has been previously pierced by extracting a disc; - Fig. 6 - is the same view1 with enlarged detail, of the above-mentioned figure which shows a stage in the process of manufacture of the lid in which the lower section of the orifice is sealed by a film or thin membrane of a resinous material (plastisol or similar) with thermoplastic and fusion characteristics;; - Fig. 7 - is the same view, with enlarged detail, of the above-mentioned figure which shows the application, during a subsequent stage in the manufacturing process, in the liquid and molten state of a resinous material (plastisoi or similar) which forms the detachable seal in order to fill the orifice and bond with the membrane or fi;m applied to the lower section of the pressure release opening; - Fig. 8 - is the same view, with enlarged detail, of the above-mentioned figures that shows the extraction of the pressure release opening seal by rupturing the end of the section of the material of the seal in the orifice which is integral, by way of fusion, with the film or membrane applied to the lower section of the orifice, enabling the pressure release opening to be fully freed and the vacuum existing inside the packaging container to be eliminated or reduced;; - Fig. 9 - is a cutaway section with enlarged detail of the section of the panel of a metal lid which shows1 by way of simple comparison and illustration, an inadequate process in which the pressure release opening has not been sealed by a film of resinous material in the liquid state in the lower section of the orifice, thus causing1 after solidificatiot~of the film, the formation of a drip or residues on this lower section of the orifice and preventing the complete and necessary freeing of the pressure release opening during extraction of the seal; - Fig. 10 - is the same cutaway view enlarged1 as shown in the preceding figure, which shows the adverse effects caused by the formation of the drip or residues on the lower section of the pressure release orifice during extraction of the seal;; - Fig. 11 - is a side view with a partial section of a glass packaging jar sealed under vacuum by a metal lid provided with a pressure release orifice for easy opening of the lid, which permits the use of glass packaging jars with thinner walls and without flange or shoulder projecting close to their openings thanks to the exclusion of the use of chucks for interlocking purposes; - Fig. 12 - is a side view with a partial section which shows by simple comparison and elucidation a vacuum-sealed packaging jar that is closed by interlocking of the lid, requiring the use of an interlocking chuck and requiring the use of glass packaging jars with relatively thick wails and a flange or shoulder projecting close to their openings.
The invention is now going to be described in more detail with reference to drawings that show the metal lid for vacuum sealing jars and other glass packaging containers which are provided as per invention with a pressure release orifice with a detachable seal that facilitates opening.
This lid has a circular panel 1, made from tinned sheet metal or aluminium, provided with a descending edge 2 and having, on its internal periphery, a neck with a closure gasket 3 made of a resinous material, such as plastisol or a similar composite.
This metal lid', that is normally used for closure under vacuum, for glass jars which package food products, comprises, at a preferably central point in its panel 1, a circular depression in the shape of a basin 4 to receive, by deposition in the liquid and molten state, the resinous material1 such as plastisol or a similar composite, that forms the detachable seal 5 that seals a pressure release opening 6 pierced in the base and the centre of the said depression in the form of a basin 4 of a section in the form of a disc 8 of the sheet metal of the panel 1 of the metal lid, which has a lower face coated with a layer of hygiene varnish 7 and, as shown in Fig. 5, the cut edges 9 of the said orifice lose the protection of the hygiene varnish 7.
In a subsequent stage in the manufacturing process, shown in detail in Fig. 6, a film or thin membrane 10 of the resinous material, plastisol or similar, having the same thermoplastic and fusion characteristics as the material that is going to form the seal 5, is applied to the lower section of the orifice 6 and to the region of its contour.
This film or membrane, given its thermoplastic and fusion characteristics, bonds with the layer of hygiene varnish 7 which coats the lower face of the panel 1 to form a closure on this lower section of the orifice 6 and, at the same time, insulates the cut edges 9 of this orifice from any contact with the internal or lower section of the panel 1 of the metal lid, thus preventing contact between the acid substances of the food products and the point 9 of the orifice that has no varnish protection.
After the application of this film or thin membrane 10 which seals the orifice 6 on its lower section and on the region of its contour, and during a subsequent stage, shown in detail in Fig. 7, a resinous material, plastisol or other composite, having the same characteristics as the material of the film or membrane 10, is applied in the circular depression in the form of a basin 4 such that it penetrates into the orifice 6 bonding by fusion through the hole 6 with the film or membrane 10 as shown in detail in
Fig. 7. This measure prevents the resinous material that forms the seal 5 from getting, during its application in the liquid state in the depression 4 through the hole, into the lower section of orifice 6. This is prevented thanks due to the prior application of the film or membrane 10 which prevents a drip 12 or any other residue of this resinous material from forming on the lower section of the orifice as Fig. 9 shows. This would impair the complete extraction of the seal 12a when the lid is opened as shown in Fig. 10 by preventing the freeing of the pressure release orifice 12b and the desired elimination of the vacuum inside the packaging container in order to release the lid.
As a result, by the process described, the running and overflowing of the resinous material (plastisol) is avoided, on the one hand, which material, for the purpose of forming the seal on the pressure release orifice, is applied in the liquid and molten state in the region in the form of a basin 4. On the other hand, this also permits in the case of the said membrane 10 the complete protection of the cut edges or faces 9 of the said orifice which lacks hygiene varnish, by preventing acids and salt contained in the packaged product from attacking and causing oxidation (rust) of the metal lid. This aspect is particularly important in the case of lids made from tinned sheet metal which, from the economic point of view, are more advantageous than aluminium lids.
When the closure seal 5 is withdrawn for the first time using the fingernail, as shown in Figs. 2 and 8, the shank 11 that is inside the pressure release orifice 6 is pulled upwards and tears the film or membrane 10. The orifice 6 is fully exposed, and this eliminates the vacuum existing inside the hollow cavity 13 of the jar, a space that normally forms above the produce 14 contained in the packaging jar and between the lower surface of the panel 1 of the metal lid. As a result, the metal lid is easily detached as shown in Fig. 3.
The process described has an additional advantage in that the solidification of resinous material (plastisol or similar) which forms the detachable seal 5 can be obtained by vulcanisation and not by simple gluing: this prevents the package from being closed again after its initial opening by re-gluing the seal 5, as the seal, once removed, cannot be restored to its original condition. This means that the purchaser can immediately detect any tampering with the packaging at points of sale. In fact, after the said seal has been extracted, the lid remains detached from the packaging thanks to the elimination of the vacuum that is the only element that retains the metal lid. Its absence means that the purchaser will reject the packaging.
It is also noted that the manufacture of the pressure release orifice and of the seal in accordance with this said process has an additional advantage in that the metal lid, normally coated with a hygiene varnish 7 on its lower face in contact with the food product, does not suffer any interruption in protection, due to both the fusion characteristics of the hygiene varnish 7 and the resinous material (plastisol) which forms the seal 5 and the film or membrane 10, which can be made using the same controllable adhesive material, providing the metal lid with perfect and complete protection from erosion by oxidation, which represents guaranteed integrity and quality for the metal lid and for the food products packed in this type of packaging.
The closure system which has been described also has an advantage in that it makes these packagings easy to open simply by extracting the seal 5 of the pressure release orifice 6 without the need for an instrument or ancillary implement and without effort in order to withdraw the lid from the packaging. Opening is effected by simply extracting the seal 5 with the aid of one's fingernail. As an additional advantage, glass jars with thinner walls and without the undesirable shoulder or flange projecting near their openings can be used, thus conferring upon the glass jars not only a saving in material but also a practical aspect that is more pleasing and appropriate for their later use as jars for domestic use as shown for example in
Fig. 11. This brings real advantages compared with glass jars whose metal lids are closed by interlocking.In fact, jars closed by interlocking must have relatively thick walls in order to withstand the blows from the interlocking chucks and, in addition, a shoulder 15 projecting close to their openings which is necessary for the interlocking of the metal lid as shown in Fig. 12.
The lid as per invention therefore provides the following main advantages a) manufacturers of food preserves everywhere know that the oxygen contained in the packaging impairs very considerably the quality of the product as well as the useful life of food products. As the lid is only held on the opening of the package by the action of the vacuum, special machines are needed to close the packages provided with such lids.
Closure is effected by producing a high vacuum inside the packages in order to better eliminate the oxygen than in common closure systems. This triples the useful life of the products sealed in this fashion without changing their colour or flavour; b) by the process described, the resinous material (plastisol) that forms the detachable seal 5 is prevented from running or overflowing when it is applied in the liquid state to the circular depression in the form of a basin 4; this material is also prevented from getting into the lower section of the orifice 6 which prevents the indesirable formation of a drip 12 which would make it difficult to extract the seal and to free or unstop the pressure release orifice 6 completely when the seal 5 is extracted; c) thanks to the breaking of the fllm or fragile membrane 10, bonded by fusion to the lower extremity of the shank 11, reliable and complete freeing of the pressure release opening 6 is achieved together with effective elimination of the vacuum in order to free the metal lid, and that is due to the extreme mechanical fragility of this film or membrane 10.
This easy-opening metal lid as per invention, although it is shown by way of example as regards only its shape and application, can obviously also serve to vacuum-seal other food product packagings or other packagings, and it can be made of whatever kind of other suitable material, including metal packagings, and always with the same advantages of practical use.
Claims (3)
1. Metal lid, for the closure under vacuum, of jars and other packages for food preserves, comprising a metal cap, made from tinned sheet metal or aluminium, comprising a circular panel (1), provided with a descending border (2) and having, on its internal periphery, a circular neck with a closure gasket (3), made of a resinous composite, characterised in that the lid has on its panel (1), preferably at a central point of the latter, a circular depression in the form of a basin (4), pierced by a central orifice (6), the said orifice being sealed by a membrane (10) of a resinous composite, applied to the lower surface of the panel (1), as well as by a resinous material applied to the region in the shape of a basin (4), so as to form an integral part with the membrane (10) which part forms a detachable seal (5).
2. Process for the manufacture of a lid according to claim 1, characterised in that the membrane is applied to the lower surface of the panel (1) so as to form the central orifice (6), and then the resinous material is applied to the inside of the basin (4) where it bonds to the accessible section of the membrane (10) through the central orifice (6), the resinous material then being hardened together with the membrane to form an integral seal.
3. Process according to claim 2, characterised in that the adhesion and the solidification of the seal (5) and of the film or membrane (10) are effected by vulcanisation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9300364A FR2700520B1 (en) | 1993-01-15 | 1993-01-15 | Easy-cover metal lid for vacuum closure, cups and other packaging for canned food and its manufacturing process. |
| JP7151166A JPH08323781A (en) | 1993-01-15 | 1995-05-26 | Method for forming pressure relief hole and detachable seal in lid |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9315777D0 GB9315777D0 (en) | 1993-09-15 |
| GB2274278A true GB2274278A (en) | 1994-07-20 |
| GB2274278B GB2274278B (en) | 1996-06-26 |
Family
ID=26230033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9315777A Expired - Fee Related GB2274278B (en) | 1993-01-15 | 1993-07-30 | Easy opening metal lid for vacuum-sealing jars and other packaging for food preserves and its process of manufacture |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPH08323781A (en) |
| DE (1) | DE4400204C2 (en) |
| FR (1) | FR2700520B1 (en) |
| GB (1) | GB2274278B (en) |
| IT (1) | IT1261524B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2297078A (en) * | 1994-03-29 | 1996-07-24 | Rojek Metalgrafica | Rolled rim can |
| US5833090A (en) * | 1995-01-25 | 1998-11-10 | Metalgrafica Rojek Ltda. | Metal lids for vacuum-sealing of packaging for foodstuff preserves |
| US5954214A (en) * | 1997-05-28 | 1999-09-21 | Optimal Food Processing Research Inc. | Cap for vacuum container having double frangible seal and container having such a cap |
| CN110902179A (en) * | 2019-12-12 | 2020-03-24 | 溆浦易锋精细瓷业有限责任公司 | Sealed ceramic wine jar |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29503717U1 (en) * | 1995-03-04 | 1995-06-22 | Ristau, Harald, 21147 Hamburg | Receptacle |
| DE10111828B4 (en) * | 2001-03-13 | 2007-04-19 | Cantec Gmbh & Co. Kg | Metal lids for closing cups and other food packaging under vacuum |
| JP5113440B2 (en) * | 2007-06-29 | 2013-01-09 | 日本クラウンコルク株式会社 | Container with lid |
| JP6112651B2 (en) * | 2012-11-11 | 2017-04-12 | 日本テトラパック株式会社 | Paper container manufacturing method and straw hole coating apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1161850A (en) * | 1967-09-04 | 1969-08-20 | Nat Can Corp | Means for Opening Containers. |
| EP0070160A2 (en) * | 1981-07-10 | 1983-01-19 | Thomas Hunter Limited | Container closure |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1718460U (en) * | 1955-12-29 | 1956-03-08 | Blechwarenwerke Schmalbach J A | STUFFED LIDS, IN PARTICULAR FOR CLOSING GLASS BARRELS. |
| DE1782395C3 (en) * | 1968-08-27 | 1973-09-27 | Alexander 4040 Neuss Keller | Sealing lids for canning jars with a detachable vacuum seal |
| BR9103896A (en) * | 1991-09-10 | 1992-03-17 | Rojek Metalgrafica | PROCESS FOR FORMING A RELIEF HOLE WITH DETACHABLE SHUTTLE SEAL, FOR EASY OPENING, IN METAL COVERS, VACUUM CLOSING, CUPS AND OTHER GLASS CONTAINERS, WHICH ARE PACKAGED FOR FOOD PRODUCTS |
-
1993
- 1993-01-15 FR FR9300364A patent/FR2700520B1/en not_active Expired - Fee Related
- 1993-07-30 GB GB9315777A patent/GB2274278B/en not_active Expired - Fee Related
- 1993-08-23 IT ITRM930570A patent/IT1261524B/en active IP Right Grant
-
1994
- 1994-01-05 DE DE4400204A patent/DE4400204C2/en not_active Expired - Fee Related
-
1995
- 1995-05-26 JP JP7151166A patent/JPH08323781A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1161850A (en) * | 1967-09-04 | 1969-08-20 | Nat Can Corp | Means for Opening Containers. |
| EP0070160A2 (en) * | 1981-07-10 | 1983-01-19 | Thomas Hunter Limited | Container closure |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2297078A (en) * | 1994-03-29 | 1996-07-24 | Rojek Metalgrafica | Rolled rim can |
| GB2297078B (en) * | 1994-03-29 | 1997-01-08 | Rojek Metalgrafica | Cans for foodstuff packing |
| US5833090A (en) * | 1995-01-25 | 1998-11-10 | Metalgrafica Rojek Ltda. | Metal lids for vacuum-sealing of packaging for foodstuff preserves |
| US5954214A (en) * | 1997-05-28 | 1999-09-21 | Optimal Food Processing Research Inc. | Cap for vacuum container having double frangible seal and container having such a cap |
| CN110902179A (en) * | 2019-12-12 | 2020-03-24 | 溆浦易锋精细瓷业有限责任公司 | Sealed ceramic wine jar |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2700520A1 (en) | 1994-07-22 |
| ITRM930570A0 (en) | 1993-08-23 |
| ITRM930570A1 (en) | 1995-02-23 |
| IT1261524B (en) | 1996-05-23 |
| JPH08323781A (en) | 1996-12-10 |
| DE4400204A1 (en) | 1994-07-21 |
| GB9315777D0 (en) | 1993-09-15 |
| DE4400204C2 (en) | 1997-03-20 |
| FR2700520B1 (en) | 1997-10-24 |
| GB2274278B (en) | 1996-06-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20080730 |