EP0043786B1 - Pull-tap for easily openable cans and method of manufacturing the same - Google Patents
Pull-tap for easily openable cans and method of manufacturing the same Download PDFInfo
- Publication number
- EP0043786B1 EP0043786B1 EP81420100A EP81420100A EP0043786B1 EP 0043786 B1 EP0043786 B1 EP 0043786B1 EP 81420100 A EP81420100 A EP 81420100A EP 81420100 A EP81420100 A EP 81420100A EP 0043786 B1 EP0043786 B1 EP 0043786B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tab
- tongue
- panel
- pull
- 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
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Classifications
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- 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
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- 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
- B65D17/34—Arrangement or construction of pull or lift tabs
Definitions
- German patents DE 629 289 or American patents US 2085200 and 3232474 show that it is possible to tear the lid and tear off a panel by printing, in the thickness of the lid, a deep incision line carefully determined.
- the initial perforation of the cover, then its tearing along the line of incision can be further facilitated by the use of a gripping tab fixed to the panel.
- the part of the tongue which is used as a perforating tool is hereinafter referred to as the front part.
- This front part generally comprises, at its front end, a perforation spout, most often at a sharp angle, as shown in DE 629 289 or US 3,232,474.
- the tongue most often comprises a gripping means such as a ring, this unless it is itself in the form of a ring.
- the tongue is fixed to the panel by a connecting means, most often, a rivet located between the two ends of the tongue, which allows at the time of the initial perforation to use the tongue as a lever and multiply the effort exerted by the consumer.
- the tongue is connected in a sufficiently flexible manner to the panel.
- the body of the tongue is preferably connected to the connecting means by a flexible tab which works in the manner of a hinge and allows a certain displacement of the tongue relative to the surface of the panel.
- the object of the invention is a gripping tab connected by a connecting means to a panel removable from a cover (2) of an easy-opening box, this by means of a tab, characterized in the tab is wound in a spiral around the front transverse part of the body of the tongue before extending rearward to the connection means, the tab being wound in the opposite direction to that of the rotation of the tongue with respect to its front part during the opening operation of the box, this winding giving flexibility to the tongue and producing, at the start of the opening operation, stiffening of the front part of the body of the tongue, thanks to the tightening of said winding around said front part.
- the spiral winding of the invention gives flexibility to the tongue instead of contributing to its rigidity and, at the start of the opening operation, this winding produces, thanks to its tightening, a stiffening of the front part of the tongue.
- the tongue is usually made from a flat blank cut from a thin sheet. This blank is then ribbed to give the tongue the desired rigidity.
- the tongue generally has the shape of a ring, which facilitates its gripping; it can also have a general shape of a straight lever. In this case, the connecting tab must be split in the form of two symmetrical lateral tabs starting from the front part of the tongue; this will ultimately have a T shape.
- the body of the tongue and the connecting tab are made from the same blank cut from a sheet. It is given, by successive stamping and folding passes, the desired final shape.
- the tab is thus formed in a metal strip in the extension of that constituting the body of the tongue.
- the tab In all cases, the tab must wrap in a spiral around the anterior part of the body of the tongue in the direction which causes its winding to tighten and, consequently, to reinforce this winding during the operation of perforating the cover. .
- To perforate the cover and then tear off the panel pull on the tab by lifting it from the rear and thus rotating it in an axial plane around its front part. Also, so that the winding of the tab tends to tighten during the opening of the box, the tab must be initially wrapped around the front part of the body of the tongue in the opposite direction to that of the rotation of the tongue relative to its front part at the start of the opening of the box.
- the rib formed in the blank to give its shape and its rigidity to the tongue must be produced with a curvature in continuity with that of the winding of the tab.
- the concavity of the rib stiffening the front part of the tongue is thus on the same side of the surface of the sheet forming the tongue as the concavity of the tab wound in a spiral.
- the tab comes from a metal strip which extends radially from the annular flat blank.
- This strip is normally a radial strip reserved inside the blank recess and oriented towards its center.
- the tab is wrapped around the portion of the blank to which it is connected, while this portion of the blank is itself bent to form a stiffening rib at the front part of the body of the tongue. It is wound by passing first under the anterior part of the body of the tongue, then returning backwards, passing over the anterior part.
- each of the two lateral half tabs is also wrapped around the crossbar of the T, this in the opposite direction to the rotation of the tongue around this transverse strip during the perforation of the box which initiates the tearing of the panel.
- the central bar of the T is used as a lever.
- the connection means between cover and tongue is here a rivet (3).
- the tongue (1) essentially consists of a body in the form of an O-ring (5) made of rolled sheet metal and a tab (6).
- the tab (6) is wound in a spiral by making a substantially turn around the transverse front part (7) of the ring (5) before extending towards the location of the rivet (3).
- the ring (5) and the tab (6) are formed from the same flat hollowed-out blank (9), shown in FIG. 3. This blank (9) is made of aluminum; it has a thickness of 0.4 mm.
- the periphery of the blank (9) is curved in the shape of a torus as shown in fig. 1, this to give the body of the tongue the desired rigidity.
- the tab (6) is wrapped around the front part (7) of the ring.
- the connection slot (10) of this torus is located below the tab.
- a perforation spout (11) is formed by stamping the part of the tab (6) located at the front of the tongue.
- the pressure exerted by the spout (11) on the surface of the cover is substantially equal to the tensile force (F) exerted by the consumer multiplied by the coeff icient d D.
- (D) is the length of the ring according to its axis and (d) the horizontal distance between the spout (11) and the axis (0) of the front part of the ring.
- (D) is of the order of 25 mm, (d) of the order of 2 mm.
- the tab (6) is in the extension of the ribbed surface forming the body of the ring (5), it is important that the bending of the periphery of the blank (9) is carried out with a dorsal at the top and its slot open (10) at the bottom.
- the rib here in the shape of a torus, which gives its rigidity to the tongue, has at least in its front part, a curvature in continuity with that of the tab.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Containers Opened By Tearing Frangible Portions (AREA)
- Auxiliary Devices For And Details Of Packaging Control (AREA)
- Rigid Containers With Two Or More Constituent Elements (AREA)
- Pens And Brushes (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Supplying Of Containers To The Packaging Station (AREA)
- Cartons (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Closures For Containers (AREA)
Abstract
Description
Depuis longtemps, les fabricants de boîtes de conserve s'efforcent de faciliter l'ouverture de leurs boîtes par le consommateur, ceci sans compromettre la solidité de ces boîtes pendant le stockage et les manutentions.For a long time, manufacturers of cans have endeavored to facilitate the opening of their cans by the consumer, without compromising the solidity of these cans during storage and handling.
Ainsi, les brevets allemands DE 629 289 ou américains US 2085200 et 3232474 montrent que l'on peut faciliter la déchirure du couvercle et l'arrachage d'un panneau en imprimant, dans l'épaisseur du couvercle, une ligne d'incision de profondeur soigneusement déterminée.Thus, German patents DE 629 289 or American patents US 2085200 and 3232474 show that it is possible to tear the lid and tear off a panel by printing, in the thickness of the lid, a deep incision line carefully determined.
La perforation initiale du couvercle, puis sa déchirure le long de la ligne d'incision peuvent être encore facilitées par l'utilisation d'une languette de préhension fixée au panneau. La partie de la languette qui est utilisée comme outil de perforation est désignée ci-après comme partie antérieure. Cette partie antérieure comporte généralement, à son extrémité avant, un bec de perforation, le plus souvent à angle vif, comme représenté sur le DE 629 289 ou le US 3 232 474.The initial perforation of the cover, then its tearing along the line of incision can be further facilitated by the use of a gripping tab fixed to the panel. The part of the tongue which is used as a perforating tool is hereinafter referred to as the front part. This front part generally comprises, at its front end, a perforation spout, most often at a sharp angle, as shown in DE 629 289 or US 3,232,474.
A l'extrémité opposée ou postérieure, la languette comporte, le plus souvent, un moyen de préhension tel qu'un anneau, ceci à moins qu'elle ne soit elle-même en forme d'anneau.At the opposite or posterior end, the tongue most often comprises a gripping means such as a ring, this unless it is itself in the form of a ring.
La languette est fixée au panneau par un moyen de liaison, le plus souvent, un rivet situé entre les deux extrémités de la languette, ce qui permet au moment de la perforation initiale d'utiliser la languette à la façon d'un levier et de multiplier l'effort exercé par le consommateur.The tongue is fixed to the panel by a connecting means, most often, a rivet located between the two ends of the tongue, which allows at the time of the initial perforation to use the tongue as a lever and multiply the effort exerted by the consumer.
Pour éviter que le moyen de liaison ne se casse et que la languette ne se désolidarise du panneau avant ouverture complète, il importe que la languette soit reliée de façon suffisamment souple au panneau. A cet effet, le corps de la languette est, de préférence, relié au moyen de liaison par une patte souple qui travaille à la façon d'une charnière et permet un certain déplacement de la languette par rapport à la surface du panneau.To prevent the connecting means from breaking and the tongue from coming loose from the panel before complete opening, it is important that the tongue is connected in a sufficiently flexible manner to the panel. To this end, the body of the tongue is preferably connected to the connecting means by a flexible tab which works in the manner of a hinge and allows a certain displacement of the tongue relative to the surface of the panel.
Comme représenté par le US 2085200 ou le FR 2 074 598, il peut être souhaitable qu'en position de repos, le bec de la languette dépasse la ligne d'incision, ce qui réduit les risques de perforation intempestifs avant emploi. Il est, par contre, souhaitable que le bec puisse se déplacer légèrement en arrière pour venir se présenter à l'aplomb de la ligne d'incision au moment où le consommateur doit exercer sur le couvercle un effort maximal pour amorcer la perforation.As represented by US 2085200 or
Dans le cas du brevet US-A-3 967 750, la perforation par la languette est facilitée par une structure dans laquelle son extrémité avant est raidie par un repli de la tôle et dans laquelle la disposition des deux points de fixation de la languette transforme celle-ci en un levier rigide et efficace. Le renforcement ou raidissement de l'extrémité avant de la languette d'ouverture apparaît également dans le brevet US-A-4015744 et dans la demande de brevet FR-A-2 408 530, sous la forme d'un repliage en trois couches ou plus selon une spirale aplatie formée au-delà du rivet de fixation. L'extrémité avant de la languette est ainsi raidie pour faciliter l'enfoncement du panneau détachable, cette particularité s'inscrivant dans des conceptions de languettes rigides.In the case of US-A-3,967,750, the perforation by the tongue is facilitated by a structure in which its front end is stiffened by a fold of the sheet and in which the arrangement of the two fixing points of the tongue transforms this in a rigid and effective lever. The reinforcement or stiffening of the front end of the opening tongue also appears in patent US-A-4015744 and in patent application FR-A-2 408 530, in the form of a folding in three layers or more in a flattened spiral formed beyond the fixing rivet. The front end of the tongue is thus stiffened to facilitate the insertion of the detachable panel, this feature being part of rigid tongue designs.
Ainsi l'objet de l'invention est une languette de préhension reliée par un moyen de liaison à un panneau arrachable d'un couvercle (2) d'une boîte à ouverture facile, ceci par l'intermédiaire d'une patte, caractérisée en ce que la patte est enroulée en spirale en entourant la partie antérieure transversale du corps de la languette avant de se prolonger vers l'arrière jusqu'au moyen de liaison, la patte étant enroulée dans le sens opposé à celui de la rotation de la languette par rapport à sa partie antérieure lors de l'opération d'ouverture de la boîte, cet enroulement donnant de la souplesse à la languette et produisant au début de l'opération d'ouverture un raidissement de la partie antérieure du corps de la languette, grâce au resserrement dudit enroulement autour de ladite partie antérieure.Thus the object of the invention is a gripping tab connected by a connecting means to a panel removable from a cover (2) of an easy-opening box, this by means of a tab, characterized in the tab is wound in a spiral around the front transverse part of the body of the tongue before extending rearward to the connection means, the tab being wound in the opposite direction to that of the rotation of the tongue with respect to its front part during the opening operation of the box, this winding giving flexibility to the tongue and producing, at the start of the opening operation, stiffening of the front part of the body of the tongue, thanks to the tightening of said winding around said front part.
A la différence des enroulements en spirale des documents US-A-4 015 744 et FR-A2 408 530, l'enroulement en spirale de l'invention donne de la souplesse à la languette au lieu de contribuer à sa rigidité et, au début de l'opération d'ouverture, cet enroulement produit grâce à son resserrement un raidissement de la partie antérieure de la languette.Unlike the spiral windings of documents US-A-4,015,744 and FR-A2 408 530, the spiral winding of the invention gives flexibility to the tongue instead of contributing to its rigidity and, at the start of the opening operation, this winding produces, thanks to its tightening, a stiffening of the front part of the tongue.
La languette est généralement fabriqué à partir d'un flan plan découpé dans une tôle mince. Ce flan est ensuite nervuré pour donner à la languette la rigidité voulue. La languette a généralement une forme d'anneau, ce qui facilite sa préhension; elle peut aussi avoir une forme générale de levier rectiligne. En ce cas, la patte de raccordement devra être dédoublée sous forme de deux pattes latérales symétriques partant de la partie antérieure de la languette; celle-ci aura finalement une forme en T.The tongue is usually made from a flat blank cut from a thin sheet. This blank is then ribbed to give the tongue the desired rigidity. The tongue generally has the shape of a ring, which facilitates its gripping; it can also have a general shape of a straight lever. In this case, the connecting tab must be split in the form of two symmetrical lateral tabs starting from the front part of the tongue; this will ultimately have a T shape.
Le corp de la languette et la patte de liaison sont fabriqués à partir d'un même flan découpé dans une tôle. On lui donne, par passes successives d'emboutissage et de pliage, la forme finale souhaitée. La patte se trouve ainsi formée dans une bande de métal dans le prolongement de celle constituant le corps de la languette.The body of the tongue and the connecting tab are made from the same blank cut from a sheet. It is given, by successive stamping and folding passes, the desired final shape. The tab is thus formed in a metal strip in the extension of that constituting the body of the tongue.
Dans tous les cas, la patte doit s'enrouler en spirale autour de la partie antérieure du corps de la languette dans le sens qui fait se resserrer son enroulement et, par suite, se regidifier cet enroulement lors de l'opération de perforation du couvercle. Pour perforer le couvercle puis arracher le panneau, on tire sur la languette en la soulevant par l'arrière et en la faisant ainsi pivoter dans un plan axial autour de sa partie antérieure. Aussi, pour que l'enroulement de la patte tende à se resserrer au cours de l'ouverture de la boîte, la patte doit être initialement enroulée autour de la partie antérieure du corps de la languette dans le sens opposé à celui de la rotation de la languette par rapport à sa partie antérieure au début de l'ouverture de la boîte. De plus, la nervure formée dans le flan pour donner sa forme et sa rigidité à la languette doit être réalisée avec une courbure en continuité avec celle de l'enroulement de la patte. La concavité de la nervure rigidifiant la partie antérieure de la languette se trouve ainsi du même côté de la surface de la tôle formant la languette que la concavité de la patte enroulée en spirale.In all cases, the tab must wrap in a spiral around the anterior part of the body of the tongue in the direction which causes its winding to tighten and, consequently, to reinforce this winding during the operation of perforating the cover. . To perforate the cover and then tear off the panel, pull on the tab by lifting it from the rear and thus rotating it in an axial plane around its front part. Also, so that the winding of the tab tends to tighten during the opening of the box, the tab must be initially wrapped around the front part of the body of the tongue in the opposite direction to that of the rotation of the tongue relative to its front part at the start of the opening of the box. In addition, the rib formed in the blank to give its shape and its rigidity to the tongue must be produced with a curvature in continuity with that of the winding of the tab. The concavity of the rib stiffening the front part of the tongue is thus on the same side of the surface of the sheet forming the tongue as the concavity of the tab wound in a spiral.
Dans le cas d'une languette annulaire formée à partir d'un flan plat lui-même annulaire, la patte provient d'une bande de métal qui prolonge radialement le flan plat annulaire. Cette bande est normalement une bande radiale réservée à l'intérieur de l'évidement du flan et orientée vers son centre.In the case of an annular tongue formed from a flat blank which is itself annular, the tab comes from a metal strip which extends radially from the annular flat blank. This strip is normally a radial strip reserved inside the blank recess and oriented towards its center.
La patte est enroulée autour de la portion du flan à laquelle elle se raccorde, tandis que cette portion du flan est, elle-même, cintrée pour former une nervure de rigidité à la partie antérieure du corps de la languette. Elle est enroulée en passant d'abord sous la partie antérieure du corps de la languette pour revenir ensuite vers l'arrière, en passant par dessus la partie antérieure.The tab is wrapped around the portion of the blank to which it is connected, while this portion of the blank is itself bent to form a stiffening rib at the front part of the body of the tongue. It is wound by passing first under the anterior part of the body of the tongue, then returning backwards, passing over the anterior part.
Lorsqu'on a une languette en forme de T, chacune des deux demi pattes latérales est également enroulée autour de la barre transversale du T, ceci dans le sens opposé à la rotation de la languette autour de cette bande transversale lors de la perforation de la boîte qui amorce l'arrachement du panneau. La barre centrale du T est utilisée à la façon d'un levier.When there is a T-shaped tongue, each of the two lateral half tabs is also wrapped around the crossbar of the T, this in the opposite direction to the rotation of the tongue around this transverse strip during the perforation of the box which initiates the tearing of the panel. The central bar of the T is used as a lever.
L'invention sera mieux comprise par la description ci-après d'un exemple particulier et l'examen des figures correspondantes.
- La fig. 1 représente, en coupe, par un plan axial une languette de forme annulaire dont la patte est formée par enroulement d'une bande réservée à l'intérieur d'un flan annulaire.
- La fig. 2 représente une vue en plan de la même languette.
- La fig. représente une vue en plan du flan plat à partir duquel a été formée la languette.
- Fig. 1 shows, in section, through an axial plane, an annular tongue, the tab of which is formed by winding a strip reserved inside an annular blank.
- Fig. 2 shows a plan view of the same tab.
- Fig. shows a plan view of the flat blank from which the tongue was formed.
Sur les fig. 1 et 2, on a représenté une languette (1) en forme d'anneau reposant sur un couvercle (2). Le moyen de liaison entre couvercle et languette est ici un rivet (3). Une ligne d'incision (4) délimite dans le couvercle un panneau facilement arrachable. La languette (1) est essentiellement constituée d'un corps en forme d'un anneau torique (5) en tôle roulée et d'une patte (6). La patte (6) est enroulée en spirale en faisant sensiblement un tour autour de la partie antérieure transversale (7) de l'anneau (5) avant de se prolonger vers l'emplacement du rivet (3). L'anneau (5) et la patte (6) sont formés à partir d'un même flan évidé plan (9), représenté en fig. 3. Ce flan (9) est en aluminium; il a une épaisseur de 0,4 mm.In fig. 1 and 2, there is shown a tongue (1) in the form of a ring resting on a cover (2). The connection means between cover and tongue is here a rivet (3). An incision line (4) delimits in the lid an easily removable panel. The tongue (1) essentially consists of a body in the form of an O-ring (5) made of rolled sheet metal and a tab (6). The tab (6) is wound in a spiral by making a substantially turn around the transverse front part (7) of the ring (5) before extending towards the location of the rivet (3). The ring (5) and the tab (6) are formed from the same flat hollowed-out blank (9), shown in FIG. 3. This blank (9) is made of aluminum; it has a thickness of 0.4 mm.
Par passes successives, la périphérie du flan (9) est cintrée en forme de tore comme représenté en fig. 1, ceci pour donner au corps de la languette la rigidité voulue. En même temps, la patte (6) est enroulée autour de la partie antérieure (7) de l'anneau. La fente de raccordement (10) de ce tore se trouve en-dessous de la languette.By successive passes, the periphery of the blank (9) is curved in the shape of a torus as shown in fig. 1, this to give the body of the tongue the desired rigidity. At the same time, the tab (6) is wrapped around the front part (7) of the ring. The connection slot (10) of this torus is located below the tab.
Enfin, un bec de perforation (11) est formé par estampage de la partie de la patte (6) se trouvant à l'avant de la languette.Finally, a perforation spout (11) is formed by stamping the part of the tab (6) located at the front of the tongue.
On voit, sur les fig. 1 et 2, que lorsque l'on prend l'anneau (1) en le soulevant par l'arrière avec une force (F), on fait d'abord pivoter l'anneau (1) autour de l'axe (0) de sa partie antérieure (7), tandis que l'enroulement de la patte (6) autour de cette partie antérieure (7) tend à se resserrer encore. Le bec (11) bascule vers le bas tout en reculant légèrement. Il vient se placer au-dessus de l'incision (4) sur laquelle il exerce un important effort de cisaillement.We see in fig. 1 and 2, that when we take the ring (1) by lifting it from the rear with a force (F), we first pivot the ring (1) around the axis (0) of its front part (7), while the winding of the tab (6) around this front part (7) tends to tighten further. The spout (11) swings down while receding slightly. It is placed above the incision (4) on which it exerts a significant shear force.
A ce moment, la languette joue un rôle de levier dont l'axe serait (0). La pression exercée par le bec (11) sur la surface du couvercle est sensiblement égale à l'effort de traction (F) exercé par le consommateur multiplié par le coeff icient d D .(D) est la longueur de l'anneau selon son axe et (d) la distance horizontale entre le bec (11) et l'axe (0) de la partie antérieure de l'anneau. Ici (D) est de l'ordre de 25 mm, (d) de l'ordre de 2 mm.At this moment, the tongue acts as a lever whose axis would be (0). The pressure exerted by the spout (11) on the surface of the cover is substantially equal to the tensile force (F) exerted by the consumer multiplied by the coeff icient d D. (D) is the length of the ring according to its axis and (d) the horizontal distance between the spout (11) and the axis (0) of the front part of the ring. Here (D) is of the order of 25 mm, (d) of the order of 2 mm.
Après basculement de l'anneau (1) et perforation du panneau par le bec (11), on exerce, par l'intermédiaire de cet anneau (5), de la patte (6) et du rivet (3), un effort d'arrachage sur l'ensemble du panneau qui se déchire le long de la ligne d'incision (4).After tilting of the ring (1) and perforation of the panel by the spout (11), an effort is made, by means of this ring (5), of the tab (6) and of the rivet (3). 'tearing off of the entire panel which tears along the incision line (4).
Pour que la languette fonctionne correctement, on voit qu'il importe que, au début de l'ouverture, l'enroulement en spirale de la patte (6) se resserre et raidisse la partie antérieure (7) de la languette. Il importe donc, dans le cas de figure, que la patte (6) soit enroulée autour de la partie antérieure (7) dans le sens (S), c'est-à-dire dans le sens opposé à celui de l'effort (F) par rapport à l'axe (0), ici, le sens négatif par rapport à l'axe (0). Ainsi, la patte (6) passe d'abord en-dessous de la partie antérieure (7) avant de revenir en passant par-dessus vers le rivet (3) situé au centre de l'anneau.For the tongue to function properly, we see that it is important that, at the start of the opening, the spiral winding of the tab (6) tightens and stiffens the front part (7) of the tongue. It is therefore important, in the case in point, that the tab (6) is wound around the front part (7) in the direction (S), that is to say in the direction opposite to that of the force. (F) with respect to axis (0), here the negative direction with respect to axis (0). Thus, the tab (6) first passes below the front part (7) before returning by passing over to the rivet (3) located in the center of the ring.
Pour que la patte (6) soit dans le prolongement de la surface nervurée formant le corps de l'anneau (5), il importe que le cintrage du pourtour du flan (9) soit réalisé avec une dorsale à la partie supérieure et sa fente ouverte (10) à la partie inférieure. Ainsi, la nervure, ici en forme de tore, qui donne sa rigidité à la languette, a bien au moins dans sa partie antérieure, une courbure en continuité avec celle de la patte.So that the tab (6) is in the extension of the ribbed surface forming the body of the ring (5), it is important that the bending of the periphery of the blank (9) is carried out with a dorsal at the top and its slot open (10) at the bottom. Thus, the rib, here in the shape of a torus, which gives its rigidity to the tongue, has at least in its front part, a curvature in continuity with that of the tab.
Les concavités de la partie antérieure (7) nervurée de l'anneau et de la patte (6) se trouvent bien du même côté de la surface de la tôle mince d'où ont été tirées la languette et sa patte.The concavities of the ribbed front part (7) of the ring and of the tab (6) are found on the same side of the surface of the thin sheet metal from which the tongue and its tab were drawn.
Crâce au resserrement de la patte (6) autour de la partie antérieure (7) de l'anneau au début de la perforation, on obtient un raidissement progressif de la languette qui, à l'origine, est relativement souple. On réalise une perforation en souplesse du couvercle.Thanks to the tightening of the tab (6) around the front part (7) of the ring at the start of the perforation, a progressive stiffening of the tongue is obtained which, at the origin, is relatively flexible. A flexible perforation of the cover is carried out.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT81420100T ATE7775T1 (en) | 1980-07-09 | 1981-07-07 | EASILY-OPEN CONTAINER PULL TAPE AND PROCESS FOR THEIR MANUFACTURE. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8015578A FR2486495A1 (en) | 1980-07-09 | 1980-07-09 | ARRACHING TAB FOR EASY OPENING BOX AND METHOD FOR MANUFACTURING THE SAME |
| FR8015578 | 1980-07-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0043786A1 EP0043786A1 (en) | 1982-01-13 |
| EP0043786B1 true EP0043786B1 (en) | 1984-06-06 |
Family
ID=9244147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP81420100A Expired EP0043786B1 (en) | 1980-07-09 | 1981-07-07 | Pull-tap for easily openable cans and method of manufacturing the same |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US4383621A (en) |
| EP (1) | EP0043786B1 (en) |
| JP (1) | JPS6010940B2 (en) |
| AT (1) | ATE7775T1 (en) |
| CA (1) | CA1164817A (en) |
| DE (1) | DE3163974D1 (en) |
| DK (1) | DK302681A (en) |
| ES (1) | ES260046Y (en) |
| FR (1) | FR2486495A1 (en) |
| GR (1) | GR75279B (en) |
| IE (1) | IE51376B1 (en) |
| MA (1) | MA19208A1 (en) |
| PT (1) | PT73337B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4496048A (en) * | 1982-12-13 | 1985-01-29 | Blackbourn, Inc. | Video cassette carrier |
| JPS6127821U (en) * | 1984-07-24 | 1986-02-19 | 東洋製罐株式会社 | Pull tab for easy opening |
| JPH01266331A (en) * | 1988-04-14 | 1989-10-24 | Aisin Chem Co Ltd | Damper |
| JPH02203034A (en) * | 1989-01-31 | 1990-08-13 | Sugatsune Ind Co Ltd | Multi-disk type damper using viscous fluid |
| DE102013104226B4 (en) * | 2013-04-25 | 2015-09-10 | Jürgen Sooth | Resealable can end wall, end wall unit and box |
| ES1227529Y (en) * | 2019-01-17 | 2019-06-21 | Grupo Conservas Garavilla S L | CLOSING COVER FOR AN EASY OPENING CONTAINER |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE629289C (en) * | 1936-04-27 | Alfonso Sada | Attachment of a double-armed, swing-up opening lever to the lid of a tin can | |
| US2085200A (en) * | 1933-03-08 | 1937-06-29 | Transitoria Ab | Closed container such as preserving cans |
| US3232474A (en) * | 1963-09-24 | 1966-02-01 | Aluminum Co Of America | Opening means for sealed containers |
| US3485411A (en) * | 1968-04-18 | 1969-12-23 | Fraze Ermal C | Tab for easy-opening container |
| FR2074598A1 (en) * | 1970-01-08 | 1971-10-08 | Cebal Gp | |
| US3967750A (en) * | 1974-09-16 | 1976-07-06 | Reynolds Metals Company | Easy-open wall |
| US4030631A (en) * | 1975-08-27 | 1977-06-21 | Ermal C. Fraze | Easy-open ecology end |
| US4015744A (en) * | 1975-10-28 | 1977-04-05 | Ermal C. Fraze | Easy-open ecology end |
| US4150765A (en) * | 1977-11-10 | 1979-04-24 | The Continental Group, Inc. | Tab construction for easy opening container |
| US4148410A (en) * | 1978-01-30 | 1979-04-10 | Ermal C. Fraze | Tab for easy-open ecology end |
| US4183445A (en) * | 1978-11-09 | 1980-01-15 | The Continental Group, Inc. | Tethered tab with changeable bend line |
-
1980
- 1980-07-09 FR FR8015578A patent/FR2486495A1/en active Granted
-
1981
- 1981-06-30 US US06/279,159 patent/US4383621A/en not_active Expired - Fee Related
- 1981-07-02 GR GR65416A patent/GR75279B/el unknown
- 1981-07-07 CA CA000381287A patent/CA1164817A/en not_active Expired
- 1981-07-07 MA MA19408A patent/MA19208A1/en unknown
- 1981-07-07 EP EP81420100A patent/EP0043786B1/en not_active Expired
- 1981-07-07 JP JP56105144A patent/JPS6010940B2/en not_active Expired
- 1981-07-07 DE DE8181420100T patent/DE3163974D1/en not_active Expired
- 1981-07-07 AT AT81420100T patent/ATE7775T1/en active
- 1981-07-08 DK DK302681A patent/DK302681A/en not_active Application Discontinuation
- 1981-07-08 PT PT73337A patent/PT73337B/en unknown
- 1981-07-08 IE IE1534/81A patent/IE51376B1/en unknown
- 1981-08-18 ES ES1981260046U patent/ES260046Y/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5755854A (en) | 1982-04-03 |
| DE3163974D1 (en) | 1984-07-12 |
| ATE7775T1 (en) | 1984-06-15 |
| IE51376B1 (en) | 1986-12-10 |
| FR2486495B1 (en) | 1984-01-06 |
| GR75279B (en) | 1984-07-13 |
| IE811534L (en) | 1982-01-09 |
| DK302681A (en) | 1982-01-10 |
| MA19208A1 (en) | 1982-04-01 |
| CA1164817A (en) | 1984-04-03 |
| ES260046Y (en) | 1982-11-16 |
| FR2486495A1 (en) | 1982-01-15 |
| JPS6010940B2 (en) | 1985-03-22 |
| EP0043786A1 (en) | 1982-01-13 |
| ES260046U (en) | 1982-03-16 |
| US4383621A (en) | 1983-05-17 |
| PT73337A (en) | 1981-08-01 |
| PT73337B (en) | 1982-09-01 |
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