US 3885696 A
A closure construction is provided for a container having a neck portion with a top rim, an annular shoulder spaced from said top rim, projections spaced outwardly from said neck portion defining male threads located between said top rim and said shoulder, and a closure lid for the container has a closed top wall, an annular side wall with a plurality of generally vertically extending, circumferentially spaced, inwardly projecting corrugations, said corrugations having an interior surface defining respective portions of a female thread engageable with said male thread. In a preferred embodiment, the annular side wall of said closure lid includes an inwardly extending formation spaced from said female thread and engageable over said shoulder of the neck portion of said shoulder.
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Description (OCR text may contain errors)
United States Patent 91 [111 3,885,696
Eberhardt May 27, 1975  CLOSURE CONSTRUCTION FOR 3,606,062 9/1971 Frisch 215/337 CONTAINER WITH LID 3,648,874 3/1972 Moller 215/337 Inventor: Heinrich Eberhardt, Gasstrabe 9,
221 1tzehoe/Holst., Germany Filed: Oct. 29, 1973 Appl. No.: 410,337
Foreign Application Priority Data Nov. 4, 1972 Germany 2254034 References Cited UNITED STATES PATENTS 5/1955 Sokolik 215/340 3/1964 215/337 12/1969 215/7 3/1970 Moller 215/337 Primary Examiner-Herbert F. Ross Attorney, Agent, or FirmMcGlew and Tuttle [5 7 ABSTRACT A closure construction is provided for a container having a neck portion with a top rim, an annular shoulder spaced from said top rim, projections spaced outwardly from said neck portion defining male threads located between said top rim and said shoulder, and a closure lid for the container has a closed top wall, an annular side wall with a plurality of generally vertically extending, circumferentially spaced, inwardly projecting corrugations, said corrugations having an interior surface defining respective portions of a female thread engageable with said male thread. In a preferred embodiment, the annular side wall of said closure lid includes an inwardly extending formation spaced from said female thread and engageable over said shoulder of the neck portion of said shoulder.
2 Claims, 1 Drawing Figure CLOSURE CONSTRUCTION FOR CONTAINER WITH LID BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap-shaped lid made of relatively soft, thin, and non-elastic material and which is is provided with a sealing insert, means for forming a vacuum-tight seal on the neck of a container, this neck being provided with first projecting edges forming a thread, and below which a second closed annular projecting edge is often provided, the container being made of a firm material; the said lid having an annular arrangement of indentations formed on the inner lateral cylindrical wall of the lid, and having the shape of axially extending corrugations projecting towards the interior, and being formed in such a way that this wall passes without deformation over the first projecting edges on the container neck, the corrugations extending over the first projecting edges forming a thread so that, when fastening the lid on the container by means of a radially elastically yielding sealing head, the corrugations are deformed by radial reduction of the diameter of the lids lateral wall at those points where the ridges of these corrugations meet with the ridges of the first projecting edges. Thus an interrupted internal or female thread is formed on the inner lateral cylindrical wall of the lid.
2. Prior Art In a wellknown standard version of such a lid, known in the prior art under the trademark UNI-SEAL, the height of the lateral wall of the lid only slightly exceeds the area of the container neck that is provided with the projecting edges forming a thread. Immediately below the end of the rib-shaped indentations the rim of said lateral wall is usually flanged outwardly.
OBJECTS OF THE INVENTION With respect to the extremely high quantities of containers to be sealed by such lids, there is a trend to increase the operational speed of the capping machines. An object of the present invention is a further improvement of the lids of the above mentioned variety, a further object of the invention is the increasing of the operational speed of the capping machine by means of a particularly reliable autocentering procedure undergone by these lids after they have been loosely placed on the openings or mouths of the containers at the outset of the sealing procedure; another object of the invention is to fully maintain or even to increase the usefulness of the lids and their potential fields of application.
SUMMARY OF THE INVENTION Considering this and the foregoing objects of the invention according to the present invention the capshaped lid of the initially defined variety is characterized in that the cylindrical lateral wall of the lid consists of two sections having cylindrical surfaces joining one another and having equal outer diameters, the upper section adjoining the closed top of the lid, being provided with indentations having the form of corrugations, the lower section adjoining the rim of the lid, being free of such indentations and being provided with inwardly 'directed flanges along the rim.
Preferably, the lower section of the inner cylindrical lateral wall of the lid has a height which amounts to at least one third of the height of the upper section.
DESCRIPTION OF SPECIFIC EMBODIMENTS OF THE INVENTION A specific embodiment of the present invention is described hereafter by way of an example and with reference to the attached drawing whose FIGURE is side view of a lid according to the invention in place on a container and partially cut away to better illustrate its structure.
The drawing thus illustrates an example of a capshaped closure lid 10 in accordance with the present invention. In this embodiment the closure lid 10 consists, for example, of aluminum sheet material, and is already fastened onto a container 20 usually having the shape of a cylindrical preserving jar which is only being shown in part in the drawing. The container or jar comprises a cylindrical neck near its opening that carries first projecting edges that form a male thread and a second projecting edge or formation thereon that is closed and of annular shape. The container 20 usually widens below its neck portion 21, attaining a diameter that exceeds the outer diameter of the closure lid 10.
In its upper section the closure lid 10 is provided with an annular arrangement of indentations or axial corrugations 12 projecting inwardly having the shape of a female thread 12 projecting inwardly. The lid 10 is shaped in such a way that its corrugations l2 initially pass without deformation over the first projecting edges 22 of the neck portions 21 of the container 20 at the outset of the capping procedure, the corrugations 12 extending over the first projectng edges 22 and being deformed in the point-shaped zones 13 where,-
their ridges meet with the ridges of the first projecting edges 22, thus forming an interrupted internal or female thread inside the lid 10 when the latter is fastened on the container 20 by nearly concentric reduction of the diameter of the lateral wall 11 of the lid 10 by means of a radially elastically yielding sealing head which is known in the art. Now, the cylindrical lateral wall 11 of the closure lid 10 consists of two sections 1 1a and 11b, having cylindrical surfaces of equal outer diameters and joined with one another the upper section 11a of the lid wall 11 adjoins the closed top wall 14 of the lid and contains the corrugations 12, and the lower section 11b, adjoins the rim of the lid 10, being free of such corrugations and being provided with an inwardly directed formation or flange 15 at its rim. The lower section 11b of the wall of the closure lid 10 has a height that amounts to at least one third of the height of the upper section 11a of the lid wall carrying the corrugations 12 which form the female thread. The lid 10 contains an annular sealing insert 16 placed in its interior. This sealing insert 16 rests on the rim of the neck 21 of the container and establishes the seal. The top wall 14 of the closure lid 10 is provided with a circular and concentric indentation 17 for engagement with the aforesaid sealing insert 16.
By virtue of these new features as set forth herein the cap-shaped lid in accordance with the present invention provides the following advantages: a highly exact autocentering action of the lid in the sealing head can be achieved when placing the lid on the opening of the container that is to be sealed, this being due to the surface of the extended apron of the lateral wall of the lid.
Thus both the lid and the container very rapidly obtain their correct position with respect to the sealing head. Hence the operating speed of the capping device can be increased considerably.
The closure lid that is fastened onto the container 20 and is rendered particularly rigid by the additional section llb with its cylindrical surface and by the inwardly directed formation or flange l5, practically withstands horizontally directed pressure and impacts when being transported, so that, if desired, a container having a cylindrical body, as indicated in the drawing by the broken lines 25, can be employed instead of the container 20 that widens below its neck 21. The ring 23 for engagement with the closure lid formation can be omitted according to the application, or according to the contents of the container.
Because of the additional lower section llb forming a sort of apron, the sealing depth, i.e., the operational travel of the sealing head pressing the lid onto the opening of the container or of the passage of the lower rim of the lid over the container neck, need not be maintained absolutely exactly.
Protection against the introduction of pollutant foreign bodies into the inside of the lateral wall of the lid is achieved by means of the above mentioned apron formed by the lower section 11b of the lateral wall of the lid and by means of the inwardly directed flange 15. This protection is important in the case of some substances to be preserved, such as for instance baby food.
Furthermore, the embodiment according to the present invention provides a so-called high lid or cap, which is particularly appreciated by many users because of its especially esthetic dimensions.
If the inner diameter of the inwardly directed formation or flange 15 situated at the lower extremity of the lateral wall 11 of the closure lid, has a value that approaches that of the outer diameter of the first project- 4 a ing edges 22 forming a male thread on the container, autocentering of the lid is achieved whenever the'latter is placed on the neck and is screwed onto a container filled with a product to be consumed in small quantities, which amounts to an essential relief for theuser when handling such a container.
What we claim is:
1. A closure and container combination comprising a container having a cylindrical neck with a top opening and a substantially flatrim surrounding the top opening, a male thread projecting outwardly around V the side of said neck extending inwardly from said rim, an annular cylindrical ring formation on said neck spaced inwardly from said male thread, a container closure lid having a recessed central portion closing the neck opening, a raised peripheral annularportion overlying said rim and a cylindrical depending skirt portion extending inwardly from said rim, an annular ceiling insert disposed between said lid raised peripheral annular portion and said rim, said lid cylindrical skirt portion having an upper section adjacent said rim with on cumferentially spaced vertically extending inwardly projecting corrugations which are malleable and deformed to define a female thread when engaged on said male thread, said lid skirt having a lower section'with the same diameter as the upper section but free of .cor-
formation and centering the. lid as it is threaded to said container. I 2. An enclosure according to claim 1 wherein the inner diameter of saidflange is substantially equalto the outer diameter of said male thread.