FI53804C - ELASTISKT DEFORMERBART BEHAOLLARLOCK. - Google Patents

Description

ΓΓ55ΖΪ1 ΓβΊ ηη ANNOUNCEMENT C ο ο λ λ VöTa Lbj () utläggningsskrift 53804 ^ V (51) Kv.lk. * / Lnt.CI. » B 65 D 43/02 FINLAND —FINLAND (21) P »t« nttlh »kemu * - Patentansttknlng 6l6 / T2 (22) H» keml »ptlvi - Ansökningsdag 08.03 * 72 (Fl) (23) Alkup & Ivt - Giltlghetsdag 08.03 * 72 (41) Become Public - Bllvlt offentllg 10.09 · 72

National Board of Patents and Registration (44) Date of publication and date of publication—

Patent Registration Office Anaökan utlagd och utl.akrlften publlcerad 02.05 * 78 (32) (33) (31) Privilege claimed — Begird prlorltet 09.03 * 71 USA (US) 1221 + 37 (71) Dart Industries Inc., 8U80 Beverly Boulevard, Los Angeles, California, USA (72) Jack Vincent Croyle, 159 Spring Street, Woonsocket, Rhode Island,

James Baldwin Swett, 8 Devonshire Drive, Barrington, Rhode Island, USA (7! +) Oy Kolster Ab (5I *) Resiliently deformable tank lid - Elastiskt deformerbart beh & llarlock

The present invention relates to a resiliently deformable container lid having a head wall having a nearly flat central portion and a portion extending outwardly and obliquely upwardly therewith to an outer edge adapted to creep deformably under the effect of pressure applied to the central portion so that the outer edge "moves almost evenly. the lid can be easily inserted into the opening of the container, with sealing members moving around the outer edge, which, when the lid is placed on, press tightly against the edge around the opening of the container.

Bowl, jug or cylindrical plastic containers with a separate lid made of flexible material are widely used for storing groceries. Various embodiments of such a cover are known. In one embodiment, the lid circumference has a downwardly open groove adapted to be placed over the edge of the container and pressed down or expanded at the edge to form a hermetic seal between the two parts.

Another commonly used cover is such that it can be bent into different positions. In one of these positions, the lid can be easily placed on or in the edge of the container, whereby its edge part is pressed tightly to abut the outer or inside of the edge of the container 53804. Further, the known plug-like cover which fits loosely in the mouth of the container and can be further expanded into intimate contact with the interior of the container rim. Finally, a stopper-like lid made of a rigid material is known, which is normally also used in containers of rigid material with a conical part in which the lid is pressed until frictional retention.

Each of these covers has, although they are satisfactory in many respects, certain shortcomings. Thus, lids with an open groove down must be stretched around the edge of the container or pressed onto it by pressing the rim of the lid downwards from several successive points by hand. This requires both time and effort, especially if the deck needs to be tightly fitted to the tank when an airtight seal is required. In addition, tensioning the cover in this way produces stress concentrations so large that they can cause tears. In addition, this type of lid tends to twist due to considerable internal stresses, making it difficult or completely impossible to place the lid on the container.

Lids intended to be bent into two positions require a certain dexterity to be properly attached to the containers, as the outer edge of the lid must be kept in close contact with the top of the container when the top wall of the lid is bent to the fixing position. This requires that the cover be held at the edges and bent in the middle at the same time.

Even the third type of lid requires dexterity for attachment to the container, and these lids have hinge portions that have had to be weakened and are therefore prone to breakage. In addition, there are certain difficulties in pressing (casting) these lids, which cause restrictions on the choice of material and, as in the first-mentioned lids, high stresses are generated in these closed positions with the risk of the lid tearing. Finally, there is a risk in these lids that the tightness is lost when objects are placed on the lid, as the weight of such objects presses down on the curved central part, so that this, due to its tendency, continues to deform to bend the lid to another, loose position. The lids also tend to pivot their insides outward so that the user must correct the condition before the lid can be attached to the container, which - except that it is cumbersome - shortens the life of the lid.

Finally, some of the mentioned types of lids are poorly suited for large containers and, due to their high space requirements, cause a reduction in the part of the container that can be used.

Frictioned covers are, of course, not very reliable in terms of guaranteeing an airtight seal.

3; 53804 1

The lid known from Norwegian patent 131,977 represents an improvement above. with respect to said known lids, in which e.g. some dexterity is required to properly secure the lid to the container to provide an airtight seal. However, the attachment and removal of the lid is further facilitated according to the present invention, characterized in that the lid has a top wall connected to the sealing members and the main wall and provided with a central, slender guide where the pusher is movable to apply pressure to the central area of the main wall.

In the solution according to the invention, it is only necessary to apply pressure to the pusher manually. The pusher is controlled so that the central part of the main wall is pressed down and the entire circumference of the cover is thus displaced for attachment or removal of the cover.

In the above-mentioned known cover, in which the hand pressure is applied directly to the cover, the application of pressure to the central part of the cover is not as certain, which is a prerequisite for the correct fastening of the cover.

The invention will be explained in more detail below with reference to the drawing, in which Fig. 1 shows the top of the lid according to the invention, Fig. 2 is a section on a larger scale of the lid and part of the jug, with the lid taken in line 2-2 of Fig. 3 and in the closed position in the jug; a partial section of the lid according to the invention and the second container and Fig. 5 is a section of a part of the jug used in connection with the lid according to the invention.

Figures 1-U show a lid 10 according to the invention with several parts which work together to achieve the effect sought by the invention.

The cover has a radially inclined, grooved or corrugated part li + with an almost flat central area 16 and a vertical edge flange 26. The cover also has a top wall 12 with a sleeve-shaped guide 13 and a presser 15 in the center. The inclined and corrugated part consists of several upwardly sprinkled ribs 18, which will be described in more detail below and which extend from a flat area 16 to the outer edge 2h of the cover part it.

The cover part 1U is preferably a deformable thermoplastic, e.g. L1) polyteone, but HD polyethylene, polypropylene, polyolefin blends or similar metals or some metals can also be used. The jug 20 shown in Figures 2 and in which the lid is specifically intended for use is also made of one of said materials} but it should be noted that the lid can also be used in jugs or containers made of other materials such as glass, metal and the like.

1 * 53804

As can be seen in Figures 2 and U, the exterior 28 of the edge flange 26 is shaped so as to be tightly confined to the inside of the mouth circumferential wall 30 of the jug 20 so as to provide a hermetic seal at this point. For this purpose, there is a thickening 32 running around the edge flange 26 around the edge flange 26, which is limited by the pressure inside the wall 30 of the jug. Figure 2 further shows that inside the wall of the jug there is a step or shoulder 3 * + which acts in response to the lid when it is placed on top of the jug. The shoulder 3U comprises an obliquely downwardly directed surface which begins at the part of the wall marked with the number 21 and ends at the side wall of the jug. The shoulder helps the user to place the lid correctly in the jug, but as shown in Figure U, other shaped jugs or containers can also be used with the lid. The type of lid described can be used to introduce liquid into a jug. In this case, the amount of air in contact with the liquid in the jug is reduced, so that the shelf life can be extended.

As shown in Figures 2 and 5, the jug 20 has a suspended column 23 on the inside of its wall 21 near the top edge 27 of the jug. This suspended column forms a / stall response which helps the user to properly place the lid 10 immediately below this column. In this position, the lid 10 does not touch the wall part 21 in the region of the cam 25, and although the lid is attached to the jug, the spout is still open so that liquid can be poured from the jug. To facilitate emptying of the jug, there is a slot 17 »inside the wall 30 approximately opposite the spout 25, so that when the lid is placed in said upper position, air can enter the jug from this point. To completely close the jug, the lid only needs to be re-inserted into the shoulder below the spout 25, forming a tight seal around the entire jug between the thickening 32 and the wall 21.

It can be seen from Figure 3 that the locally deformable lid can be contracted and expanded so that the edge flange 26 moves with the edge 2k of the lid part 1U. In this case, the elastic properties of the material are utilized and, in particular, the shape of the part 1U between the flat part 16 and the edge 2k is crucial in this respect. This part 1U of the cover is corrugated when pressure is applied to the flat central part 16, so that the edge 2U and with it the flange 26 move equally inwards.

The inclined, corrugated, grooved or corrugated wall portion U is provided with a plurality of upwardly and outwardly tapered ridges 18. As can be seen in Figures 2, 3 and 1 *, the upper portion 19 of these ridges 18 forms an angle with the flat portion 16 and is not flush with the edge 2k with flat part 16. The bases Uo of the waves are located in a plane parallel to the plane of the almost flat part 16 when the lid is not in the operating position. When the lid is placed on top of the jug, the bottoms of the corrugations are in any case slightly angularly displaced towards the center of the jug, due to the oversizing which ensures an effective seal between the parts.

5 53804

Wave height at edge 2h, i.e. at the point where they integrally engage the flange 26 is such that their uppermost portion 19 is located approximately outside or above the thickening 32. Although the lateral dimensions of the outer portion 28 adjacent the thickening 32 are slightly larger than the inner diameter of the jug, applying pressure to the flat center portion 16 of the lid will cause the edge flange 26 to move sufficiently inward to be easily placed on the lid.

As best shown in Figure 2, the edge flange 26 has a plurality of vertical inner projections 29 which are pressed into one piece with the flange and are spaced therefrom. These protrusions 29 terminate - near the top edge 35 of the flange below the inwardly directed recess 37 herein. The seat 39 formed by the wall 1 + 1 extends upwards from the flat area 16 and is adapted to co-operate with the pusher 15 described in more detail below.

- The top wall 12 of the lid comprises a conical wall 38, in the central part of which a guide 13 is formed. This guide extends above the wall 38 and is co-located with the seat 39. A downwardly projecting flange 1 * 0 is formed on the outer edge of the wall 38 so that a circumferential lip 1 * 2 remains on the circumference of the wall. This lip is located between the ends of the recess 37 and the protrusions 29 and is effectively held between these overlapping portions.

The pusher 15 can move axially in the guide 13 and extends inside a seat 39 provided with a plurality of inner ribs UU which, under pressure, abut the pusher so that it remains pressed against the wall part 11 * in the seat. A shoulder 1 * 7 is formed in the pusher, which is adapted to abut below the wall 38 in the vicinity of the guide 13 and thus to act in response to stop the upward movement of the pusher and the wall part il *. In this case, the pusher transfers the axial movement to the flat area 16 of the wall 1U, whereby the edge 2h and the flange 26 move as described. The upper end of the guide 13 is formed as a finger handle 1 * 5, above which the pusher extends. During use, grasp the fingers from under the finger grip and press the plunger down with your thumb.

As already mentioned, the main object of the invention is to achieve maximum tightness with the least possible force effect, so that as little stress as possible is generated in the cover.

It is noted that shapes of the top wall and pusher other than those described above are possible within the scope of the invention. For example, the pusher could be connected to the 6 53804 guide so that the seat can be omitted. In addition, the presser could be formed in one piece with the wall portion 1U, thereby reducing the number of components.

When the cover is used, a displacement of the conical corrugated or grooved region 18 occurs when the pressure is applied to the flat region 16. The conical corrugated shape increases this displacement as the corrugations corrugate like an accordion. In this case, the flange 26 retracts inwards so that the lid part 1U can be introduced into the mouth of the container, and when the pressure acting on the flat part ceases, the lid part 1¾ returns to its original shape, pressing the flange 26 against the inside of the container mouth wall. To remove the lid from the tank, simply press the button down, after which the lid can be easily removed.

Claims (5)

7! 53804 ί Claims:; A resiliently deformable container lid having a main wall having a nearly flat central portion (16) and a portion (iH) extending outwardly and obliquely upwardly toward the outer edge (26) adapted to resiliently deform under the action of pressure applied to the central portion such that the outer edge moves almost evenly so that the lid can be easily inserted into the container opening, the outer edge being provided with movable sealing members (32) which, when the lid is on, press tightly against the edge around the container opening, characterized by upper lids (12), connected to the sealing members and the main wall and provided with a central, slender-shaped guide (13), in which the pusher (15) is movable to apply pressure to the central region of the main wall. Lid according to Claim 1, characterized in that the lower end of the pusher (15) is fastened to the central part (16) of the main wall. Lid according to Claim 1, characterized in that the lower end of the pusher (15) is detachably fastened to a seat (39) formed in the central part (16) of the main wall. Lid according to Claims 1 to 3, characterized in that in its upper wall (12) and the edge wall flange (26) has overlapping portions (29, U2) for joining the top wall (12) and the main wall together. Lid according to Claims 1 to U, characterized in that there is a circumferential shoulder (1 * 7) between the ends of the pusher (15) which is turned upwards to limit the upward movement of the main wall when the main wall is pressed from below the upper wall (12). Lid according to one of the preceding claims, characterized in that the upper end of the guide (13) has an outwardly directed flange (U5) which forms a finger handle.