DE2033907A1 - Peel-off closure for metal cans and the like - Google Patents

Description

concerning
Peel-off closure for metal cans and the like

The invention relates to an easy-to-open lock for metal cans and the like.

It is becoming more and more common. Drinks in metal cans to pack. This type of packaging has compared to the traditional Glass bottle has a number of advantages, for example it is lighter and less fragile. However, there is a problem that such a packaging should "open" easily and, if possible, without tools.

CO OO O 09

For this purpose it has already been proposed to close such cans with lids which have a tear-off field with a pull tab. The pull tab is usually attached to the tearable panel by a rivet made in one piece. However, the tensile strength of the fastening of the pull tab and the regularity of the tear leave off; to be desired; Therefore, the lid has also been made with a cut off ", a stopper made of plastic, on which a Laoche is provided can be pressed in, *

the line of weakness provided on the lid 'praise, t · stopper replaces the rivet; if the weakness Ib against it

BATH ORIGINAL

is provided on the stopper itself. disfigures the opening in the stopper. In these embodiments, however, it is difficult to to achieve the required tightness, especially when under; Gas pressurized drinks are packaged.

The invention is based on the object of remedying these deficiencies by proposing a gas-tight closure which can be deducted with the least possible, from the outset calculable effort.

This object is achieved with a peel-off closure for metal cans, in which the lid of the can has an opening on v / e, those with a plastic stopper molded and solidified in it is closed gas-tight by a formed on it, engaging in the interior of the can foldable lip is held on the lid.

The manufacture of the stopper on the spot takes place under known temperature and pressure conditions instead, for example by spraying, direct pouring or by complete or 'partial deformation of a blank or the like. The material used is preferably a polypropylene.

In a preferred embodiment of the invention, the foldable lip of the stopper lies along the edge of the opening on the inner surface of the lid and protrudes substantially at right angles away from this inner surface. When opening the can leads the movable lip pivots about an articulation zone described below; its top ends up in a the direction substantially perpendicular to the edge of the opening, so that the stopper can be pulled off without a crack occurring anywhere.

The plug can have a second, fixed lip which «I in the middle of the stuffer * parallel to the foldable one Lippa, if a circular lip is concentric to this, ure stretches. The facing planks of the foldable

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Lip on the one hand and the fixed lip on the other hand be straight, beveled, or curved »you delimit ■ '. . ' between them a groove that is more or 'less' wide and more or-less deep, depending on the stiffness of the joint- zone should receive. The shape of this hat is designed to allow the moveable lip to pivot at least 90 ° without going through the Fixed lip to be handicapped.

The thickness of the fixed lip can also be adjusted accordingly change the requirements; it can be arranged on the "inside of the stopper or central indentation Reinforcement be contracted or in certain special cases even be omitted entirely. . '· ■ ".-.'

The joint zone is determined by several parameters: the Abotand between the starting point of the inner plank of the movable lip on the one hand and the edge of the opening

..- · '', in the lid on the other hand, the shape .the " ■■ movable lip, the width of the rut, ', the mass of the stationary Lip or, where appropriate, the internal reinforcement or "Verdi cku-ng. By varying these various parameters it is possible with plastics of very different stiffness achieve the same effects.

The depth of the groove-between, ilen two lips may be longitudinal change their scope; this change "causes a gradation the force required to pull off the stopper.

'If after the initial loosening of the movable lip that Removal of the stopper should be made easier at ground level the stopper is provided on the outside and / or parallel incisions are provided of which the inner coincide with or oppose the outer these can be offset. '·' ■ '■

The rigidity of the stopper can also pass through in the middle Area seim.r outside over; el, «- nc · lU-ppui vorr [: ärkt noin,

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·. On the outside of the stopper is more practical Handle part provided, which is held by one in a ring or another; easily graspable body ending tab can be formed ».

. . For packaging a pressurized liquid such as For example beer, it can be useful if the lid has a has a second opening of smaller diameter than the first, which is closed in the same way with a stopper, the Joint zone can optionally be modified. The two plugs can be connected to one another by a web; in this pail is the handle part of that of the two plugs to be removed first.

The invention is explained in more detail below with reference to schematic drawings of several exemplary embodiments. In the drawings show:

1 shows an axial section of a closure; Pig. Fig. 2 is a plan view of the same shutter; Pig. 5 shows an axial section of a second closure,

which has a reinforcing rib; Pig. 4 shows an axial section of a third closure with incisions;

Pig. 5 shows an axial section of a quadruple closure ■, with a reinforced central area and a circumferential area

Anger of varying depth; Pig. 6 to 8 the different phases in opening, one fifth embodiment of a closure, too

in axial section; and FIG. 9 is a plan view of a closure with two openings *

The closures are greatly exaggerated in all figures! Measures and not necessarily in the right proportions- · ·· nits shown.

In the execution form according to FIG. 1 int a cover 1 with ■ an opening provided with a plug 2 vcrr-jchlor.s-.en

is. The stopper comprises a membrane 3 'which is surrounded by a reinforced edge, designated as a whole by 4, into which the free land 10 of the cover 1 engages at the level of the membrane. The reinforced edge 4 des.Stopfens m has its with respect to the box, which it closes, the inner side of an annular groove 5, which separates a movable lip 6 of a fixed lip. 7 On the part 8 of the reinforced edge 4 arranged above the level of the cover 1, a grip tab is arranged, namely either a grip tab 9 protruding to the side or a grip tab 9 * protruding upwards. The stopper 2 can be connected to a second similar stopper by a web 12 extending from its edge 4. .

The stopper is made of a plastic that is removed from the contents - the can is not attacked, preferably made of polypropylene.

The free edge 10 of the lid 1 can be a normally have upwardly directed bead 11, which in the manufacture of the plug the shrinkage of the plastic in one Preferred area directs, whereby the plastic anchored to the flange and increases the tightness of the closure will. "

The one in Pig. 3 plug shown can be abruptly remove as it is in its middle area 3 by a rib 13 is reinforced, which is circular in the example shown, but can also have any other shape. By this rib caused stiffening has the consequence that the Stopper instantly loosens along its entire circumference when it is opened.

If the packaged product is not under internal pressure and a gradual opening is desired, the middle field. of the plug according to Pig. 4 have a series of cuts 14 either on one side or on both sides; if such incisions are provided inside and outside, they can face one another or be offset from one another.

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Another way ... a. To achieve gradual opening is shown in FIG. Here is the midfield strongly reinforced; its thickness can be equal to that of the band ". The groove between the movable lip 6 and the lower one middle area i7, which here replaces the stationary lip, has ^^ yr a depth variable over its circumference: it is deep, at d, er Page 15 »where a · pull tab 9 is arranged, and takes from there from gradually · to a diametrically opposite point

In the one chosen to explain the various phases of removing a plug, shown in FIGS. 6 to 8, The last example is the fixed lip through a central .Ver- ■ Reinforcement replaced, and the thickness of the outer part 3 'is essentially the same in the middle and at the edge. In Fig. 6 is the .'Closure shown as it is provided on the can.

. To initiate the opening process, the pull tab 9. grabbed by the user and pulled up. Under the effect this train begins the movable lip 6 around its articulation zone to pivot down towards the groove 5. To the extent that the As the force practiced increases, the surface 6 ', which is at the edge of the opening of the Cover 1 is applied, gradually In one with its starting position a right angle enclosing position according to Fig.

Finally, in FIG. 8, the surface 6 'has pivoted around the edge of the cover 1 and the stopper can be completely removed pull off. In this pull-off position, the movable lip lies at least approximately against the central reinforcement 17, whose edge 17 '| finds such a form that he completes it Lowering the movable lip njLchi; with special needs.

In Fig. 9, a cover with two openings is shown The one provided for pouring out the liquid contained in the can opening is closed with a large plug 2,

while the one provided for the entry of air when opening

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opening is closed with a small plug 18. The two Plugs are connected to one another by a web 12, which is beyond the small plug in a handle part that continues ends in a hanging 19. .

The cross-sectional shape of the lips 6 and 7 can be within the scope of the described, such as a comparison between FIGS. 1 and 6 shows, change within wide limits.

- Expectations -

BÄD OBlGlNAL 109808/0246.

Claims (12)

Expectations Pull-on closure for metal cans and the like, thereby characterized in that the lid (1) of the can one. Opening. Which has formed and solidified with a in it Stopper (2) made of plastic is sealed gas-tight, which engages in the interior of the can by a formed on it foldable lip (6) is held on the lid. 2. Peel-off closure according to claim 1, characterized marked chn e t that the foldable lip (6) of the stopper (2) rests along the edge (10) of the opening on the inner surface of the lid (1) and protrudes substantially at right angles from this inner surface. 3. Peel-off closure according to claim T or 2, characterized in that g e k e nnzeichne 't that the stopper (2) has a "second, fixed lip (7) on its inside in its central area, which extends parallel to the foldable lip (6). 4. Peel-off closure according to Claim 1 or 2, characterized that the stopper (2) has a thickening (17) on its inside in its central region. 5. peel-off closure according to claim 3 or 4, characterized in that g e k e η numbered, that the facing planks of the foldable lip (6) on the one hand and the stationary lip (T) or the middle thickening (17) on the other hand, limit an annular groove (5). 6 peel-off closure according to claim 5, characterized in that g e k e η η that the annular groove (5) one along its Has circumferential changing depth. 109808/0246 BATH ORIGINAL 7 peel-off lock * according to one of claims 1 to 6, characterized in that ge k e η η ζ ei c η η e t that the cover (1) at the edge (10) its opening has an upwardly protruding TJmbördelung (11). 8. Peel-off closure according to .. claim. 7, thus g e k e η η - show that the TJmbördelung (11) in an outside on Plug (2) formed edge bead (8) is embedded. 9 · peel seal according to one of claims 1 to 8, characterized ke e g η η ζ η et verifiable that the plug (2) on the outside and / or parallel inside, its flexibility has when pulling increasing incisions (14). . . .... 10. Peel-off closure according to one of claims 1 to 8, characterized g e k e η η ζ e i c h η e t that the plug (2) outside in its central area has one or more stiffening ribs (13). · 11. Peel-off closure according to one of claims 1 to 10, characterized characterized in that the stopper (2) has a handle part (pull tab 9) ϊ · ■ ... '... ". · 12. peel seal according to one of claims 1 to 11, characterized g e k e η η ζ e I et η, that the cover (1) has two "comprising, each with a stopper (2j 18) sealed openings and the plug by a web ( 12) are connected to each other 13 · Peel-off closure. According to claims 11 and 12, characterized in that the handle part (9) on the smaller. '(18) of the two plugs (2, 18) is arranged diametrically opposite the web (12). . . 1 0 9808/024 6 "bathroom ORSGIMAU