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
  • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • 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
  • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
  • B65D77/2028—Means for opening the cover other than, or in addition to, a pull tab
  • B65D77/2032—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container

Definitions

• the present invention refers to a closure for cans, especially for canning cans, specifically of the type in which the lid of the can is materialized in a frame, fixable to the body of the can or single piece with á, determining a wide mouthpiece that is closed by a removable sheet.
• the object of the invention is to achieve maximum simplification in the means of fixing the sheet to the frame and perfect protection thereof both against the effects over time of the contents of the can itself and of the external environment that surrounds it, and all this with total absence of risk for the user during the opening manipulation of the can.
• conventional canning cans are structured by a body, based on a metal sheet suitably treated both externally and internally, a body that can adopt a prismatic, cylindrical or other configuration, and which in any case and after filling receives due to its opening to a closing cap, also metallic, of similar characteristics, which is mechanically flanged on the
• the aforementioned mouthpiece determines, in addition to a watertight closure, a perimeter rim usable in the subsequent opening maneuver or a support means for the classic can opener.
• the aforementioned conventional cans have been replaced, with increasing intensity, by those that incorporate a system commonly called "easy-open” in which the lid is provided, in the proximities of the aforementioned perimeter rim, of a die-cut determining a line of weakening that allows a tear opening, for which purpose the detachable sector of the cover is associated with a ring, first usable as a means of initiating the cut and immediately afterwards as ripping handle.
• the effect of heat sealing initially crushes the curl and, in the long run, can produce a rebound effect, modifying both the level of both seals and, consequently, the level of closure of the container. It is also worth noting that the double heat sealing not only makes it more difficult to open the container, but it can even lead to breakage due to the lid being broken or even spilling. Government liquid during the opening operation.
• the invention proposes solves in a fully satisfactory way the problems previously exposed, in the different aspects discussed.
• the invention focuses on the fact that the aforementioned flange presents its marginal zone, internal or external, flanged or folded by mechanical means, determining a substantially cylindrical curl or flange, so that the marginal zone of said flange close to its free edge is fixed by mechanical union to the initial zone of the flange, producing a mechanical closure by contact between both surfaces and thus hiding and protecting the free and initially cutting edge of the body.
• the configuration of the curl proposed by the invention in which the curl or flange is at a lower level than the rest of the flange or on the outside of the can, allows the sheet to be heat-fixed to the flange in the flat sector and the majority of it through a unique fixing perimeter line, which facilitates the detachment of the sheet during opening, without the need for another heat-sealing line inside the aforementioned curl or rim.
• the fixing of the sheet constituting the cover is carried out by heat welding on the ring or internal perimeter flange of the body in the flat and majority sector of said flange without the internal rim being thus affected by said union.
• Figure 1. Shows a perspective view of a can provided with the closure that constitutes the object of the present invention, in accordance with a classic example of practical embodiment for said can in which it adopts a configuration aimed at the rectangular prism.
• Figure 2. Shows an enlarged detail and in section of the can of the previous figure, at the level of its mouth and according to a first embodiment of the invention.
• Figure 3. Shows a section similar to the previous figure, but corresponding to a second embodiment of the invention.
• Figure 4.- Shows a third embodiment in which the closure is between the outer fold and the contents of the can.
• Figure 5. Shows a fourth embodiment in which the folding it is hidden below the edge of the can.
• the cover may lack the aforementioned frame (2) as a physically independent part of the body (1), so that the flange (3 ') is obtained from own body
• the sheet (4) can also be provided with a tab (5) for manual fractionation, which constitutes a handle that can be used in the opening maneuver.
• said flange (3-3 ') incorporates in its internal marginal zone a recess (7) or internal flange, substantially cylindrical, as seen in any of Figures 2, 3, 4 and 5, which flange is It is carried out by mechanical means, which is displaced towards the interior of the container as shown in Figures 2 and 3 or towards its exterior as shown in Figures 4 and 5, so that the marginal area (9) of said rim proximates to its free edge (6), it is fixed by mechanical union to the initial area of the flange.
• Figures 4 and 5 show respective embodiments in which the rim is in the can outside the welding area of the sheet, for example, in figure 4, this rim is raised, being able to even form an area of easy stacking of these containers, leaving the rim uncovered out of any contact with the inside of the container.
• Figure 5 shows another embodiment of the flange, but already hidden at the bottom forming a flat sealing surface of the closure sheet.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Containers Opened By Tearing Frangible Portions (AREA)
• Closures For Containers (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=33155451

Family Applications (1)

Country Status (5)

Families Citing this family (1)

Citations (7)

• 2003
  • 2003-04-08 ES ES200300827A patent/ES2246634B1/es not_active Expired - Fee Related
• 2004
  • 2004-04-06 WO PCT/ES2004/000155 patent/WO2004089769A1/es active Application Filing
  • 2004-04-06 EP EP04725951A patent/EP1626008B1/de not_active Revoked
  • 2004-04-06 DE DE602004028360T patent/DE602004028360D1/de not_active Expired - Lifetime
  • 2004-04-07 PE PE2004000359A patent/PE20040967A1/es active IP Right Grant

Patent Citations (7)

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