JPS5873543A - Easily opened can end section with pull-tub holding split piece with strain removing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This application is filed under application number 298924. This is a continuation-in-part application filed on September 3, 1981, by Ra1ph J 8tolle, with the title of the invention: "Soltab for easy open can end for M retained splinters with strain relief device."

The present invention relates to a pull tab for the end tube or the like of a metal can of the beverage type, and in particular to a pull tab which is retained at the end of the upper can after opening and which breaks the lobes after repeated bending. The present invention relates to a pull tab that includes a device for preventing.

Many metal cans for holding beverages and other liquid products have an easily opened end, and this end has a pull tab attached to a tab on the end of the can. Identified by score lines, the sol tab can be drawn at the end of the can to create an opening for accessing the contents of the can.

For ecological and safety reasons, in many regions it is now required that the flap and associated pull tab be attached to the end of the can after opening. Various methods have been proposed to ensure that the splinter and Soltuff do not separate from the can end.

For example, in one type of easy-open can end.

Lifting the gel tab causes the lobes to fold downward into the can, forming an opening for the contents. A structure like C is widely used (1), but it has the disadvantage that the unsealed top surface of the splinter is immersed in the contents of the can, which requires that the ends of the can be cleaned before opening. There is.

, another type is the lobe mooring system shown in my US Pat. No. 3,462,042, published 8B19/1969. Although this type of device is easy to construct and operate1, for example, under some circumstances the position of the splinter after the can has been opened may prevent drinking from the can. Two proposals were made by M and A.

No. 3,795,342-11, issued March 5, 1974 to Mu@htaa. In this construction, the lobes are folded back onto themselves when the Soltab is pushed inwardly against the top of the can end to fold the lobes into shallow recesses. However, the sharp bend created by the lobes folded like an accordion causes the lobes to break and separate from the can end.
tfil/rI+tm4%1111M1. >#++ Trying to attach the above splinter flat to the end of the can.

Alternatively, it may occur when the opening is bent many times in an attempt to partially close it again.

Yet another prior art for providing a can that is easy to open and retains tethered fragments is by K E* G, Kamlnskl and F', R, Na, dated October 2, 1973.
United States granted to dolskl! lff 3,7
No. 62,597. In this structure, the lobes are torn open with a soltade or device, and the pull-tab is provided with a member at ``, when the sol-tab is pulled up to begin tearing the lobes, this lever member lifts the lobes upwards, thereby The said lobes are torn open.

Furthermore, what is important in manufacturing the end of a can?

To prevent the lacquer or coating that protects the metal base of the can from being worn away and damaged by the product contained in the can, a single point of contact should be made on the underside of the edge. The structure of a certain type of can end is to secure both ends of the can with overlapping wraps.

For example, in a structure such as that disclosed by A$hton, the ends of one can are of the described end-to-end contact type; The present invention is intended to provide a pull-tab with a strain-relief device for retaining the splinter material, the strain-relief device being intended to provide a pull-tab with a strain-relieving device which reduces the strain of the splinter material when it is bent. In an illustrative preferred device operative to prevent cracking and separation from the can end, the retained splinter extends partway diametrically across the can end and is defined by a scored line. The scored line extends through a generally arcuate portion adjacent to the can end rim and a pair of spaced portions extending inwardly toward the center of the can end. The scored line has a cross-sectional shape in which the depth increases from the center of the rice in the can toward the outer rim, that is, the thickness gradually decreases.

The graspable soltade is held by rivets or the like in the arcuate portion of the can end at one end of the flap for tearing the flap open. The score line is bent over the end of the can when the lobes are torn open, and the rips stop at the other end of the lobes.

The splinter was torn to create an opening in the end of the can.
! PK, said pull tab is pressed inwardly against said can end, with said pull tab facing said pull tab away from said opening, and at the same time said splinter is pressed inwardly against said can end; The lobes are folded back over themselves like an accordion and deposited on the outer surface of the can end, so as to form a strain-free area in contact with the line Kll; Located below, the can end acts to remove distortion of the facing and prevent breakage of the facing when the pull tab is pressed flat against the can end. In this position, the opened lobes have a first bent portion adjacent to the solvent tab and a second bent portion bent in the opposite direction at a distance from the dispersion position of the lobed piece to the can end. , the curvature larger than the curvature of this second bent portion makes it possible to change the deposition position of the above-mentioned lobes and this second bent portion.
and a third bend located below the lower surface 111 of the can end between the bends. As will become clear in the detailed description below, this third bent portion has a large curvature.

The bending strain is extended to a length greater than the length of the splinter; this prevents the splinter from falling off the end of the can.

In another embodiment, the score line is provided with a portion with a reduced residual wall thickness, and this thin portion is formed by a bending line passing behind the rivet (when the sol tab is raised, the lobes are directed downwardly).
It extends from around the edge of the can (where it begins to curl) towards the center of the can end. This thin portion of residual wall thickness can further facilitate upward camming of the pull tab and reduce strain on the rivet.

In yet another embodiment, the Soltab has a pair of levers, one on each side of the centerline of the lobes, and the pair of levers is one on each side of the centerline of the lobes; and the nose-like member, and serves to pull the splinter upwards after the rivet.

Additionally, in order to grip the Soltab and to cover the rim of the entrance at the end of the can, a device that supports and lifts the Soltab over the surface of the end of the can is provided by the splinter. It can also be provided in the form of a pair of peas located along both sides and outside the score line.

In addition to the other advantages mentioned above, [1] both ends of the can of the present invention can be secured to one end, the upper end, of the can by rolling it over the other, without bringing any part into contact at one end.

One feature of the present invention will be explained in detail below.

An outline of the can end portion 1 of the present invention is shown in FIG. 1・This can end portion 1
is generally circular and includes a raised tongue 2 extending around it, which tongue 2 connects the can end 1 to a suitable cylindrical beverage can 3 or the like. It is for depositing as is well known in the art. Generally, the can end l is made of a relatively malleable metal, such as aluminum, but it can also be made of plastic or other materials if desired. The shape of the raised tongue-like part 2 allows it to be fixed to both ends of adjacent cans by overlapping and rolling it under the upper end of the tongue-like part without any of the parts touching at one end.

The retained lobes 4 extend diametrically across the can end from a position just inside the raised tongue 2 to the center of the can end. The lobes 4 are identified by keyhole-shaped scoring or tearing lines 5, which are usually circular or arcuate sections, which are connected to the tongue 2 of the can end. adjacent to. The score line 5 terminates in a pair of score lines 7 spaced apart in the center of the can end;
This scored portion 7 forms the other end of the retained piece. The separated marked lines 7 should be at least approximately parallel as shown by number 7a in Figure 1, or should be made parallel to each other as shown by number 7a in Figure 1
As shown by b, an acute angle "α" is formed with respect to the center of the can end 1.
They can be made diagonally to each other so as to form a "." This angle "α" is determined by practical considerations so that the lobes 4 can be pushed downwardly through the can end 1, as shown generally at 21 in FIG. For best operation of the retained lobes of the present invention, a value may be taken to create a void for the portion 4.

It has been found that the portion of the lobes 4 between the scored lines 7 should be approximately 22% of the total length of the lobes, and as best shown in FIG. or a cross-sectional shape increasing in depth from the center of the can toward the raised tongue. In a preferred embodiment, said score line begins at the innermost end of score line 7 at a practical depth of 4, but extends more or less linearly towards said raised tongue 2, as shown in FIG. As shown, the depth at point 5 becomes approximately half the thickness of the can end. In other words, this marked line 5 becomes shallower as it approaches the end of the marked line part 7, and this marked part 7 becomes shallower.
disappears completely at the end of The details will be explained later,
The cross-sectional shape of this scored line is combined with the neck-like portion 8 of the lobes, and cooperates to flatten the lobes against the upper surface of the can end 1 and to strain the bends of the lobes. The can end 1 of the invention also includes a grippable annular shaped sol tab 9 which can be shaped into any size and shape as required. can do. Soltab 9 is held by rivets 10 or the like inside the arcuately shaped portion 6 of scored line 5 adjacent one end of leaf 4 -C, as is well known in the art. Used to split open the lobes.

The outermost end of the pull tab 9 forms a nose 11 adjacent to the pull tab (IOK), and the nose 11 acts to initiate tearing along the score line 5 by lifting the pull tab. By doing this, the lobes are bent along the line opening. The exact location of this bend is the rivet 10 above.
1.59 from a perpendicular point to the rear of the rivet lO, that is, in the direction away from the snout 11.
(1/16 inch) or more. At this point, the above pull tab and lobes are
K as shown in Figure B. The bending along the II curve B is performed by the cow-circular e-F13mK so as to partially surround the lower side of the 11 bet 10 as shown in the fourth diagram.

Furthermore, the present invention is intended to reduce the residual wall thickness 4 of the scored line cross section, and the thinner portion η of this residual wall thickness is as best shown in FIGS. 3 and 7. , approximately from the base of the rivet 100 or bending line 13 toward the center of the can end 1, the weak area ρ of the rib is a sufficient distance to ensure a thin residual wall thickness, but the pressure retention of the can end is Stretch at a distance that is not large enough to adversely affect performance.

This makes it easier for the Soltab 9 to rise, removes strain from the rivet 10, or directs the splinter 4 toward the center of the can end 1 to reduce the force required when pulling it initially. guaranteed.

The peads 14 raised in a curved shape are arranged outside the score line 5 and along both sides of the lobed piece 4.

The innermost edge of Soltab 9 is K so that you can grasp this Soltab.
This pull tab is secured to the top surface of the peat 14 to allow it to be raised over the can end.

Furthermore, after the lobes 4 are removed to form the can end IK opening, the raised peas 14 also serve to cover the sharp edges of the opening. The marked line part 7 is.

5, as shown by number 7b, if they are at acute angles to each other, the raised peas 14 will begin to break apart, as shown in FIGS. After this, the pull tab can be pulled back on the housing by completely cutting off the remainder of the scoring line and creating an opening in the end 1 of the can. The score line 5 is stopped at the other end of the lobes 4 to hold the lobes bent to the can end when the lobes are split open. Furthermore, as a result of making the structure of the scored line into the above-mentioned chino-ke or cross-sectional shape,
When the pull tab is removed from the opening 16,
More force is required to separate the splinter from the can end. About this.

Under combination with the neck 8 of the said lobes, a curvature 17 is created, which curvature 17 forms the lobes 4 for one can end 1.
between the deposition position 18 and a sharper (curved) portion along the bend line 13, which bend line 1 is located between the above-mentioned tear-initiating operation already described in connection with FIGS. 4A and 4B. This sharper bend is necessary to keep the pull tab 9 and the leaf 4 as close as possible to the upper surface of the can end 1, as best seen in FIG.

FIG. 6 shows the can end of the invention in the above-mentioned retention position, in which the pull-tab 9 enters inside the can end l, which intrusion causes the splinter 4 to rise above itself. This is caused by the folding and overlapping of the sol tabs, which allows the sol tab to be crushed flat against the end of the can. In this position, the retained lobes 4 include a first fold or bend 19 adjacent to the pull tab 9 and following the bending line 13, and the lobes are bent against the can end. Point 18 and 1st Ji1
It includes a second folded portion or a second bent portion limited between the bent portions 19 and bent in the opposite direction. Further, as a result of forming the above-described bent portion 17, a third bent portion 4 is formed, and this third bent portion 4 is located between the attachment point of the lobed piece to the can end and the second bent portion. do. The curvature of the third bent part B is larger than the curvature of the second bent part, and a part of the third bent part d of the can is positioned under the lower surface of the can end, and the above-mentioned lobes are subjected to stress when the lobes are bent. Create areas for concentration relief and breakage prevention. The arcuate portion of the lobes forms a bend with a larger curvature, and the lobes are removed [occupying a portion of the opening 16 formed]. The covered part does not interfere with the handling of the contents of the can, and this part of the leaf 4 touches the contents of the can, as indicated by the bend 21. It doesn't stick out too much inside the can.

Of course, the can end 1 and the Soltab 9 are as shown in FIGS. 5A, 5B and 6.

The function of this can is not impaired even if it is pressed or crushed by the top 16 of the end of the can; This pull tab 9 can be bent or moved back and forth without breaking and separating the sol tab 9 from the can end 1.

FIGS. 8 to 14 show the linked operation of the can end 1 and the Soltab B according to the present invention, and this puller 12B is 1
A pair of lever rest members are provided on both sides of the center line 2 of the lobes 4. Repets) IO
K adjacent nasal part! indicates an improved type; otherwise, this embodiment is the same as FIGS. 1 to 6;
The same numbers are given to similar members.

The pull tab according to the embodiment of the present invention shown in FIGS. 8 to 14 is intended to be provided with a lever member, which is in the form of a protrusion or off-cut, and which is attached to the pull tab according to the embodiment of the present invention. They are disposed on both sides of the center line 5 and in front of the bending line 13 . [The exact position of the above-mentioned lever stand member is not very important except that it is preferable to place this lever stand member in front of the above-mentioned bending line 13 and that it is preferable to bring it as close to this bending line 13 as possible. This is because if the lever member is closer to the bending line than the nose 4, the leverage will be greater. 8 to 11, it is clear that when the pull tab phantom is lifted into a vertical position, the lobes 4 are torn upwards in the area 4a. From this point, pull the ring of the pull tab 2 backwards and remove the lobed piece 4.
It's easy to tear it open.

The embodiment of FIG. 14 operates in exactly the same manner as described for the embodiment of FIGS. 1-7.

To provide a detailed description of the invention, changes in detail, materials, dimensions and arrangement of parts herein described and illustrated may be made within the principles and scope of the invention as expressed in the claims. It can be performed by a person skilled in the technical field.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the embodiment of the present invention in which the lobes are in the closed position, Fig. 2 is a partial sectional view of @2-2 in Fig. 1, and Fig. 3 is the can end of Fig. 1. The cut of the engraved line which is the detail of the part.
An enlarged partial cross-sectional view showing the shape, JI4M diagram is the bottom ms of the state in which the sol tab is pulled at the end of the can in Figure 1 and the tear begins along the marked line,
4mg is a partial cross-sectional view of the 948-4BKf&R pipe in the fourth figure, Figure 6A is a partial cross-sectional elevational view of the end of the can when the lobes in Figure 1 are in the fully open position, and Figure 5B is a partial cross-sectional view of the can end. Figure 1 is a partial cross-sectional side view of the end of the can when the lobes are in a partially crushed position, and Figure 6 is a portion of the end of the can when the Soltab shown in Figure 1 is held on the upper surface of the can end. Cross-sectional side view. FIG. 7 is a partial cross-sectional view taken along line 7-7Kf8 of diagram #I1, and FIG. 8 is a partial cross-sectional view of the second diagram of the present invention! Il! FIG. 9 is a partial sectional view taken along line 9--9 in FIG. 8, and FIG. 10 is a section IIA of the end of the can in FIG. 8. FIG. 11 is an enlarged partial cross-sectional view showing the cross-sectional shape of FIG. A partially sectional elevational view showing the side surface of the end of the can when the lobes in Figure 8 are in the fully open position, and Figure 13 is the end of the can when the lobes in Figure 8 are partially crushed. FIG. 14 is a partially sectional side view showing the side surface, and FIG. 14 is a partially sectional elevational view showing the side surface of the can end when the pull tab of FIG. 8 is held on the top surface of the can end. 1... Can end of the present invention, 2... Tongue, 3... Drink container (can body), 4... Flap, 5... Engraved-16.
... arcuate part of the marked line, 7... marked line part, 8... neck-like part of the lobe, 9.23... soltab, 10... lipets),
41... Nasal part, 13... Bent line, 14... Bead, 19... First bent part, 20... Second bent part,
21...Third bending part. Applicant's agent Kiyoshi Inomata FIG, 4B FIG 5B FIG, 7

Claims (1)

[Claims] 1. At the end of the can, a lobed piece is held that extends radially from the center of the can to the rim at the end of the can, and the lobed piece is attached to the rim at the end of the can. Adjacent rounded portions are added by keyhole-shaped score lines q#, and a relatively narrow portion is identified by two portions of said score lines whose ends are separated so as to hold the lobes in place when splitting; the scoring line becoming shallower towards the end of the section and disappearing completely at the end, the pull tab being retained in the lobes by a rivet housing or similar device adjacent to the rounded end; The pull tab has a snout for lifting the Soltab and starting tearing along the scored line, and the pull tab bends the splinter downward along the transverse line behind the rivet when the bow 1 is raised. Beginning to tear the inscription line to form an irises in the lobes, the soltade is pulled back to complete the end opening and fold back into the lobes adjacent to the ends. Optionally, when pressed against the top of the end of the can, the soltade flattens the first bent part and has a curvature greater than the curvature of the second bent part, so that the end face of the can is flattened. bending the second bend to form a third bend extending below; The third bending part is characterized in that the second bending part assists the second bending part in preventing the breakage of the breakage piece when the breakage piece is bent. Can end. 2. The relatively narrow portion is defined by two generally parallel portions of the score line, and retains a lobed piece with a strain relief device according to claim 1. Can end with pull-dub for easy opening. 31. The self-sealing narrow portion is defined by the two scored lines that are oblique to each other and become more acute as they approach the center of the end of the can. An easy-to-open can end comprising a sol tab holding a splinter with a strain relief device according to item 1. 4. The sol tab pulled backward and crushed approaches the can end. % characterized by maintaining an overlapping relationship
FF An easy-to-open can end comprising a sol tab holding a splinter with a strain relief device according to claim 1. 5. A pull tab holding a lobed piece with a strain relief device according to claim 1, wherein the third bent portion is formed in the relatively narrow portion of the lobed piece. Equipped with a can end for easy opening. 6. The strain relief according to claim 1, wherein the relatively narrow portion of the piece defined by the two portions is about 22% of the total length of the piece. Easy-open can end with pull tab retaining splinter with device. q#WFfClaim 1, further comprising a device coupled to the upper can end for lifting the sol tab over the upper can end to cover the opening formed in the upper can end. An easy-open can end having a pull tab retaining a splinter with a strain relief device as described in Clause 1. 8. The above-mentioned mounting includes a groove sealing a raised pea, which is disposed outside the scored line along both sides of the lobed piece and serves to support the sol tab. An easy-to-open can end comprising a pull tab holding a splinter with a strain relief device according to claim 1. 9. The splinter extends to the middle of the upper can end. A can end portion that is easy to open and is equipped with a strain relief device according to claim 1'IA and a sol tab holding five lobes. 10. The first bent portion and the second bent portion. An easy-open can end with a pull tab holding a claim piece, characterized in that the parts are bent in opposite directions so that the pull tab can be crushed flat against the can end. 11. The score line is located at a portion of thinner residual wall thickness, and this thinner portion of residual wall thickness extends from the bending line toward the center of the can end, thereby making it easier for the Soltab to cam upward. Claims 1. % An end portion of the can that is easy to open and is equipped with a sol tab that holds and removes the splinter along with the strain removing device described in item 1. 12. The thickened portion where the score line remains is weakened along the score line A patent characterized in that the pressure holding capacity of the can end extends towards the center of the can end at a distance not so large as to cause harmful effects, which is a distance of a light minute to guarantee the range. An easy-to-open can end comprising a sol tab holding a lobed piece with a strain relief device according to claim 11.13. a pair of lever members, each of which is disposed between the #1 bending line and the nose member; 14. An easy-to-open can end with a pull tab retaining the splinter with a strain relief device for IP eaves; The base member is bent more than the nose-like member.
13. A can end with a pull tab holding a 5-lobed piece and a strain relief device with a 13-section κ arrangement, characterized in that the can end is disposed close to the 11 κ. , 15, #F with the strain relief device according to claim 13 κ, characterized in that the lever member is constituted by an offset κ extending outwardly beyond the score line in the sol tab. Easy-open can end with sol tab to retain splinter. 16. Apparatus for engaging said can end for grasping said pull tab and for lifting said pull tab over said can end and for passing through said opening formed in said end. 14. A strain relief device as set forth in claim 13, wherein the lifted device is 5K shaped so as not to coincide with the lever member. Can end for easy opening. 17. A patent characterized in that the lifted device has raised beads that are disposed outside the scored lines along both sides of the lobes and that function to support the sol tab. An easy-to-open can end comprising a sol tab holding a splinter with a strain relief device according to claim 16. 18. The scored line is a portion of the remaining thin wall of the scored line extending from around the bending line toward the center of the can end, thereby making it easier for the Soltab to cam the upward cam movement. %, wherein strain on the rivet is relieved or the force required to begin pulling the splinter toward the center of the can end is reduced! 'Fl! III. Scope of Interest: An easy-to-open can end comprising a gel tab for retaining a splinter with a strain relief device according to item 13. extending from around the bending line toward the center of the can end at a distance sufficient to ensure that the can end is secure, but not so great as to affect the pressure holding capacity of the can end. The part with thin remaining wall thickness! , thereby making it easier for the pull tab to cam upwardly to relieve strain on the rivet or to begin pulling the splinter toward the center of the can end. 18. A can end with a solutab holding the five-lobed piece with a strain relief device according to any one of claims 13 to 17, characterized in that it reduces the force required.