DE1969039U - CONTAINER MADE OF THIN-WALL PLASTIC. - Google Patents

Description

20.7,67;

DIPL.-INQ. F. THIELEKE DR.-ING. R. DORINQ DIPL.-PHYS. DR. J. FRICKE

BRAUNSCHWEIG - MUNICH

C 14 000 / 81C Gbm uns.Z .: 12

Continental Can Company, Inc., 633, Third Avenue, Mew York 17, New York

USA.

Container made of thin-walled plastic

The innovation relates to a container made of thin-walled plastic with a cup-shaped container body closed at one end and a push-in lid, in which the sump has an outwardly curled sand and one towards the bottom in diameter decreasing circumferential wall and the plug-in cover one the Eandeinrollung the fuselage overlapping ring channel-shaped collar have, and with your still the trunk just below the roll-up and the plug-in cover between the cover base and the collar have open beads in the same radial direction, which are in snap-like sealing engagement with one another when the container is closed.

A thin-walled plastic container with a thin-walled snap-on lid is known, in which the container at its upper Edge is folded outwards and at a distance below this sand a circumferential rib for receiving the cover has, while the lid rait its circumferential Collar grips over the upper edge of the container. Furthermore has

the lid engages in the groove of the container edge Tip with a noticeably smaller radius than the groove on the edge of the container on, the one above her in the cover collar, all-round and axially resilient paragraph assigned. The lid can be placed in the vacuum deep-drawing process ens be made, the rib of the lid with a considerably, lesser? / andstarke than its upper collar edge

is. and it should optionally be designed as the lid base a relatively hard plastic that becomes easily brittle during processing, especially impact-resistant polystyrene be used. To the necessary sealing option to give, the desired, elastic sealing engagement should be guaranteed by the design described. Due to the interaction of the smaller wall thickness with the axial spring action of the cover shoulder, in this case Arrangement can be achieved that the cover rib is deformed essentially in the axial direction and no longer in the radial direction is, whereby the risk of tearing is to be largely reduced.

In this known training, although a sufficient Seating is achieved in that the lid snaps resiliently into its seat in the container and is held in this seat will. However, the snap-like engagement is ensured by the fact that, when the cover is inserted, the cover area between the primordial rib and that over the sand of the container gripping collar is stretched elastically, with the same

early the seal between the collar and the container edge and on the other hand is reached between the clasp and groove of the container at two points located at a considerable distance. To get the desired To ensure the sealing effect and the elastic fit, must be the areas in question of the lid and the container edge, which are in considerable mutual axial distance are made with relatively great accuracy will.

Ss is the task of the innovation, which was explained in more detail at the beginning To develop containers made of thin-walled plastic so that once the desired seal between the lid and the container is achieved in a simpler and more reliable "way than before, and on the other hand, the possibility is created at the same time is that container for itself and cover for itself can be stacked in a simple manner as this for the High-speed packaging machines are required which pack the goods in the containers and at the same time connect the containers and the lids to one another.

This object is achieved according to the invention in that the Beads on the fuselage and on the plug-in cover are designed as radially inwardly projecting shoulders and at the same time as stacking shoulders in stacks of lids or in the swamp for one corresponding diameter having lid base or a protrudes outwards below the sealing shoulder on the fuselage.

sloping and downward shoulder of the same Serve diameter.

Advantageously, the cross-sections are those when closing Snapping beads or shoulders each other designed accordingly, in particular V-shaped, that they form at least two mutually perpendicular annular sealing areas. In this way the beads on the one hand of the lid and on the other hand of the container body are mutually braced, namely in an axial direction Sighting, with the bead of the container compressed in an axial seal and the bead of the plug-in lid in an axial direction Direction is stretched. In this way, not just one A reliable snap-like fit between the two parts is guaranteed, but also on the beads themselves the required seal with the desired elastic Pre-tension guaranteed. It is therefore not necessary to provide special abutment elements on the collar of the plug-in cover, which snap over the sand of the container that has been turned over to the outside.

With the new arrangement there is also the advantageous possibility of removing the container while the lid is being applied to vent until the lid almost snaps into place Has reached the end position. This is at quick work ends Packaging machines are of considerable importance, since the plug-in lid over a considerable axial length in the container

ter protrudes, whereby sicli when putting the lid on considerable air displacement results, ferni this displaced If air cannot be let out of the container to a sufficient extent, there is a risk that it will get inside the container an overpressure builds up, which over time the seal loosens and possibly also lifts the lid out of its snap-like seat.

This difficulty can be eliminated in a simple manner that in the trained according to the innovation Container the i-ring bead of the container wall on its circumference has distributed interruptions for venting the interior of the container. These interruptions can occur if the The lid snaps into its end position, completely through the sealing surfaces between the lid and the container be covered or sealed. The vents can also be used with Yorteil where it is packaged iJare, e.g. Swiss cheese, which is based on the Permanently gases developed which could result in the same disadvantage. In this case it is easy to install Venting points ensure reliable, safe venting without contaminating the contents or can be influenced from outside in any other way. The seals can be arranged so that the Venting only becomes effective when a predetermined internal pressure is developed, as long as the cover is complete is inserted in the closed position.

The container after the innovation ensures that with him the packaging is hygienic, economical and strong, and its lid is excellent after it has been applied Sealing with the container results and still easily removed by the user, i ^ ground. Are after the New venting points are provided, so these act like a valve, i.e. secure the contents from binding Atmosphere from the outside and still ensure sufficient pressure relief to prevent premature and undesirable Avoid lifting or loosening the lid.

At the same time, the innovation ensures a reliable way of working guaranteed for packaging machines which, based on corresponding stacks of lids or container stacks, from which the individual elements are removed one after the other in quick succession. Through the training it becomes prevents the parts in the stack from being pressed into one another so tightly that the automatic removal devices Subject to malfunction.

The innovation is illustrated below using two examples explained in more detail on schematic drawings.

Fig. I is a side view of a container with applied Closing cover according to the innovation.

Pig. Figure 2 is a top plan view of the Pig container. I.

FIG. 3 is a partial cross-section on the line IXX-IXX of FIG. 1 with the lid attached from the container.

Fig. 4 is a vertical section showing two containers stacked one inside the other.

Fig. 5 is a partial vertical section showing the two stacked one inside the other Closing cover shows and

Fig. 6 is a partial vertical section similar to that of Fig. 5; which shows a modified version of the container and lid.

The packaging 10 shown in FIGS. 1 and 2 consists of a cup-shaped container 12 and one in its opening inserted, adapted closure lid 14. Container of this type are used, for example, for packaging a foodstuff, such as Swiss cheese or the like.

The container has the usual bottom 16 (Fig. L) with a from this protruding outwardly sloping jacket wall 18, the end at its upper end that delimits the filling opening has an outwardly curled edge 20 (Figs. 3 and 4). The upper region 22 of the jacket wall 18 jumps immediately

under the edge section 20 compared to the adjoining lower one Wall area 24 in front and is designed so that it has a stacking ring extending around the circumference of the container and inward forms on a bead 26, which holds the lid 14 in the closed position on the container opening in a sealing manner. The trailing edge of the wall area 22 forming the stacking ring forms a downwardly directed stacking shoulder 28 the section 29 of the wall area 22 which follows on top extends except for an inwardly and upwardly sloping bottom section of the bead 26. This also has an upper shoulder forming portion 32 which extends upwardly and outwardly from its junction 34 on part 30 and to the lower edge a short iTand section 36 connects, which is in the rolled container edge 20 ends.

Preferably 26 are inwardly open in the annular bead Slots 40 are provided as a spout for liquids and as an air outlet when the lid 14 is placed on the container 12 serve.

The Yerschlußdeckei 14 (Fig. 1-3 and 5) is made from a single cut of material and designed so that it has a flat bottom surface 42 "and a side wall 44 protruding from the sands and slightly outwardly corresponding to the slope of the upper one Wall region 22 of the container is inclined so that it is telescoped into. This when the lid 14 is placed on the container 12.

The upper edge 46 of the ceiling side wall 44 simulates one Open ring channel at the bottom, which he rait over the rolled up Slide the vessel edge 20 and so this can serve as a cover cap when the closure cap 14 is applied to the container opening will. In this side area 44 of the closure cover, an outwardly open singing groove 48 forms an inwardly projecting one Bedding 50, in which the inwardly projecting singing bead 26 of the container engages when the lid 40 is on the Container 12 is in Yerschlußposition, in which its side wall area 44 telescopically into the upper side wall area 22 of the The container is inserted.

Between the bedding 50 formed by the Kingnut 48 and the bottom surface 42 of the lid there is a 7 / at dab section 52 of sufficient height so that the lid bottom surface can not be bent open 42 under the internal pressure of the container on the sealing Sita between the parts 50 and 26 without significant Effect remains.

The cross-sectional shape of the bedding 50 of the lid corresponds essentially to the single bead 26 of the container. she has a lower, inwardly and upwardly jumping Hingabschnitt 54 above the Ifandbereiches 52, the to your after outside and above inclined singing section 56 connects and one upwardly facing seat which extends up to the upper wall portion 58, the upper part of which is the inner wall the channel-like edge formation 46 forms. When the closure

Lid 14 is applied to your container 12 in the closed position, as already mentioned, the hand formation 46 of the closure lid forms a cap covering the edge curl 20 of the container 12 and engages the hanging bead 26 of the container 12 in the annular groove 48 of the bedding 50. Here, the upper ring shoulders 32 and 56 lying on top of one another and the lower hanging shoulders 34 and 54 of the interlocking ring bead 26 and bedding 50 which lie on top of one another form an effective seal for the closure. Any bulging of the lid base 42 under increasing internal pressure of the container 12 has no adverse effect on the tight fit between the bead 26 and the bedding 50 because the flexible wall section 52 between the ceiling Ibοdeaflache 42 and the bedding 50 is switched on. Excessive pressure in the container as a result of gas formation in the filling product is rendered ineffective by the ventilation slots 40. BeBn _1, when the internal pressure of the container exceeds a predetermined value, the upper and lower ends of the slots 40 are opened so that compressed air or gas can escape before the internal pressure is so great that it lifts the lid 14 and the ring bead 26 and bedding 50 disengages.

Fig. 4 shows the stacking of the containers. The inside diameter of the container 12 on the innermost sand of the ring bead 26 is noticeable smaller than the outermost diameter of the stacking shoulder 28, so that when one container is pushed into the other? iti.rd that Shoulder 28 of the upper container on the inside and behind

obliquely downwardly projecting Kingrand 32 of the bead 26 of the lower container is seated in such a way that the lower wall areas 24 and the upper .7aiidbereich 22 from the corresponding Wall areas of the next container in the stack are kept at a distance from one another and the lower container slightly from the next container in the stack above can fall off when he is a magazine or the like. taken will.

The closure lids 14 are also stackable according to FIG. 5 for individual removal. The diameter of the innermost edge of the bedding 50 is noticeably smaller than the outermost diameter of the bottom surface 42 of the lid, so that the lid with the sand of their bottom 42 when stacking on the inside "and below inclined Mingabsatz 56 of the bedding 50 of the respective lower cover sit and their ΐ / 'andbereich 52 and 58 in one of their Separation from the stack facilitated distance to each other are held.

Fig. 6 shows a modified embodiment "of the container and lids. In this embodiment of the innovation, the container 112 has an upper wall area 122 with an annular bead on, which is modified in its cross-sectional design compared to the singing bead 26 according to FIGS. "3-5 as her Bottom part 130 has a rounded contour such that it is arcuate in the wall area 129, which is the lower section the stack ring structure forms, passes over. The upper

Should I inherit. 132 of the bead 126 has a somewhat stronger one Slope on than the shoulder area 32.

The bottom part 154 of the bedding 150 is also curved into over the wall area 152 in the top wall, which separates it from the bottom surface 142. The arch shape of the bead area 132 and beggar area 154 is such that there is a good contact area over a substantial area between the two superimposed surfaces of these areas results when the cover 114 is pushed into the opening of the vessel 112 in the closed position (FIG. 6).

The bump surface 142 of the closure cover 114 has a relatively narrow sand area 160, which is inclined outwards and upwards towards its connection point on the vertical wall section 152 and the tendency of the sealing surface areas 130 and 154, which lie on top of one another, as a result of an upward movement caused by the increasing internal pressure of the container De Icke! Area 142 to stand out from each other counteracts. This is achieved in that this annular portion 160 of the Beckel surface 142 a we sentliehe upward movement allowed, without substantially reducing the Äbdichtfoereiches between the wall portions 130 and 154. The furthest on the inside surfaces of the annular bead 126 and ballast 150 are both rounded and both shoulder regions 132 and 156 are inclined inwards and downwards, in an etiras greater than

the corresponding shoulder areas 32 and 56, the embodiment of the innovation shown in FIGS. 3-5.

The combination of a lid locking and stacking ring structure that according to the new in both elements, namely in the container embodied both in the closure lid, is located in each of the two elements at a distance from surfaces or others Areas which tend to impair the elasticity in these structures, so that the lid is effectively in the closed position snaps onto the container and does not leak when low pressures develop in the container, which is caused by generation of gas through the contents or through squeezing pressure on the side wall of the container when handling them could. A uniform position of the stacking rings is also achieved when the lid and container are thermoformed from blanks a suitable plastic such as a high impact resistant one Styrene, because the stacking rings are created in an earlier stage of the plastic stretching where the plastic blank still fills the mold and before it is stretched to the minimum of its wall thickness.

Protection claims

Claims (5)

EA. 40606 * 7/20/67 - 14 claims for protection 1. Container made of thin-walled plastic with a cup-shaped container body closed at one end and a plug-in lid j where the fuselage has an outwardly curled edge and a circumferential wall that decreases in diameter towards the bottom and the plug-in cover forms the rolling of the fuselage have overlapping ring channel-shaped collar and at which continues to hurry the Eumpf oil-below the curl and the plug-in lid between the bottom of the lid and the collar have open beads in the same radial direction, which when the! Containers are in snap-like sealing engagement with one another, characterized in that that the beads on the fuselage (12) and plug-in cover (14) as radial inwardly projecting shoulders (26, 126 or 50, 150) are formed and at the same time as stacking shoulders in Ceiling stacking bziir. Eump stacks for the one corresponding Diameter of the cover base (42, 142) or one below the sealing shoulder (26, 126) on the fuselage to the outside protruding and downwardly directed shoulder (28, 128) of appropriate diameter are used. 2. Container according to claim 1, characterized in that the ^ ingsicke (26) of the container wall interruptions distributed over its circumference (40). for ventilation of the container interior. 3. A container according to claim l or 2, characterized in that the cross-sections of the oeim closing ineinanöerschnappenden beads (26) or shoulders (50) are designed correspondingly to each other, in particular V-shaped, that they have at least two perpendicularly spaced annular sealing areas (32, 56 and 30, 54). 4. Container according to claim 3, characterized in that the two-ring-shaped sealing areas (32, 56 and 30, 54) are arranged inclined downwards and upwards to the vertical axis of the container. 5. Container according to one of the preceding claims, characterized characterized in that the sod area (142) of the cover (114) a relatively narrow sand area (160) which rises upwards and outwards to the adjoining jacket wall (154).