FORM -2
THE PATENTS ACT, 1970
(39 of 1970)
& THE PATENTS RULES, 2003

COMPLETE SPECIFICATION
(See section 10 and rule 13)
Title:
AIR TIGHT LID WITH HOLD-DOWN SPRING DEVICE AND TEMPER-EVIDENT ELEMENT
Applicant: PAREKHPLAST INDIA LIMITED

THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED.

FIELD OF INVENTION
The present invention relates to a moisture absorbing caps for containers. In particular, the present invention relates to a moisture absorbing cap with a tamper-evident ring for tablet containers having a plurality of flexible helical webs descending from the lid. More particularly, the present invention relates to a moisture absorbing cap for tablet containers with enhanced tamper-evident features for detecting tampering with the containers and enhanced securing in position of the stored products.
BACKGROUND OF THE INVENTION
Certain pharmaceutical products are hygroscopic in nature, i.e. they absorb moisture present in their surroundings. Therefore, while dispensing such hygroscopic products, e.g. tablets, there is a tendency for these products to absorb moisture due to frequent opening and closing thereof, particularly in small tablet containers. While it is important to prevent products such as tablets from absorbing moisture and turning soggy, it also important in the packing of such pharmaceutical products that the container provides effective safety features as well as tamper-evident means to enable the user recognize any tampering of the products.
PRIOR ART
Normally, hygroscopic pharmaceutical product containers such as tablet containers are closed or sealed by means of closures. These closures include a desiccant chamber provided with a hygroscopic material facing the hygroscopic product in order to soak-up humidity in the product container so as to prevent degradation or spoilage of such hygroscopic product, like tablets. Another moisture ingress preventing feature is the sealing of the container, wherein by proper fitting of the closure lid with the container mouth, air-tightness of the container is achieved and ensured. Finally, to safeguard pilferage of the contents of the container, a tamper-evident ring is configured / attached to the closure lid by, means, of connection bridges. The bridges are

made frangible, so that on the first opening of the closure lid from the product container, bridges irretrievably break and such a break is visible to any user/purchaser by merely observing these broken bridges and there is no likelihood of the an opened/tampered container being passed off as an unopened container.
DISADVANTAGES WITH THE PRIOR ART
It is observed with the existing closures of the pharmaceutical containers, such as tablet containers that clandestine spurious product manufacturers skillfully open the closure from the container without breaking the connection bridges and by carefully sliding the tamper-proof ring over the container edge.
Therefore, there is a need to propose and design a safe and secure container closure, which not only prevents moisture from entering the container and degrading products contained therein, but also provides an effective and secure tamper-evident ring to be attached to the closure to ensure that the closure can never be removed without breaking frangible bridges configured thereon.
SUMMARY OF THE PRESENT INVENTION
In accordance with the present invention, there is provided a closure for a pharmaceutical product container, the closure comprises:
(i) a flat lid of the closure;
(ii) a peripheral wall depending from the edge of said flat lid;
(iii) a chamber for storing desiccant such as silica gel, also depending from
said flat lid; (iv) a thin profiled web descending from the flat lid and resting on the
product contained in the container for holding the same in place within
the container; (v) a circular seal configured to make the contents between the depending
peripheral wall and the desiccant chamber; and (vi) a tamper-evident ring;

wherein the tamper-evident ring includes a circular sleeve depending from said peripheral wall and a thin ring attached to the sleeve via a plurality of frangible bridges provided at the upper edge of the sleeve, wherein the inner surface of the thin ring has a plurality of projections configured on the inner surface thereof.
Typically, the peripheral wall comprises parallel circular engravings for providing a grip on the closure.
Typically, the peripheral wall further comprises an external indentation or recess configured under the top circular engraving for providing a tab for opening the closure from the container.
Typically, the frangible bridges are attached to the thin ring at positions between the tapered inner projections configured thereon.
Typically, the circular seal is configured substantially convex on upper top outer surface thereof and the circular seal is disposed adjacent the tapered projections for providing sealing of the closure in combination with the mouth of the pharmaceutical product container.
Typically, the thin profiled web is a web consisting of a plurality of thin spiraling arms configured depending from the flat lid and disposed between the circular seal and the desiccant chamber and connected to a circular ring to be supported on the top-most layer of the product contained inside the pharmaceutical product container.
Typically, the internal surfaces of the spiraling arms and circular ring are configured flat and flush with each other.

facing each other and configured vertically tapering inwards from near the lower edge of the thin ring up to near the top edge of the thin ring and ending near the convex portion of the circular seal.
Typically, the pairs of twin narrow projections and the pairs of broad projections are disposed at 90° with respect to each other.
Typically, the twin narrow projections include flat vertical outer faces and adjacently disposed broad projections include flat vertical faces facing each other for locking on container mouth and tapering outer faces for facilitating lateral movement for breaking frangible bridges on first opening of the closure from the pharmaceutical product container.
OBJECTS OF THE INVENTION
Some of the objects of the present invention - satisfied by at least one embodiment of the present invention - are as follows:
An object of the present invention is to provide a closure for a pharmaceutical product container, which prevents moisture ingress therein.
Another object of the present invention is to provide a closure for a pharmaceutical product container, which acts as a tamper-evident closure.
Still another object of the present invention is to provide a closure for a pharmaceutical product container, which facilitates secure locking thereof on the mouth of the pharmaceutical product container.
Yet another object of the present invention is to provide a closure for a pharmaceutical product container, which facilitates better in holding in place the products therein to avoid damage thereto.
A further object of the present invention is to provide a closure for a pharmaceutical product container, which ensures effective sealing thereof on the mouth of the pharmaceutical product container.

A still further object of the present invention is to provide a closure for a pharmaceutical product container, which prevents the clandestine replacement of original products by harmful and/or low-quality spurious products therein.
These and other objects and advantages of the present invention will become more apparent from the following description when read with the accompanying figures of drawing, which are, however, not intended to limit the scope of the present invention in any way.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The present invention will be briefly described with reference to the accompanying drawings described below:
Figure 1a shows the top view of the closure for a pharmaceutical product container configured in accordance with the present invention;
Figure 1b shows the front sectional view of the closure for a pharmaceutical product container configured in accordance with the present invention;
Figure 2a shows a perspective view of the closure for a pharmaceutical product container configured in accordance with the present invention;
Figure 2b shows another perspective view of the closure for a pharmaceutical product container configured in accordance with the present invention;
Figure 2c shows yet another perspective view of the closure for a pharmaceutical product container configured in accordance with the present invention;
Figure 3 shows a side-view of the closure for a pharmaceutical product container configured in accordance with the present invention; and

Figure 4 shows a partial view of the top portion of the closure for a pharmaceutical product container configured in accordance with the present invention.
DETAILED DESCRIPTION OF THE ACCOMPANYING DRAWINGS
In the following, different embodiments of the present invention will be described in more details with reference to the accompanying drawings without limiting the scope and ambit of the present invention in any way.
Figure 1a shows the top view of the closure for a pharmaceutical product container configured in accordance with the present invention;
Figure 1b shows the front sectional view of the closure 100 for a pharmaceutical product container configured in accordance with the present invention. The closure 100 includes flat lid 102, a peripheral wall 104 depending from the edge of flat lid 102, desiccant chamber 106 for storing desiccant 108 such as silica gel, which is also depending from flat lid 102 and concentric thereto and disposed inwardly from the peripheral wall 104. A disc 110 closes the chamber 106 to retain the desiccant within the chamber. A tamper-evident ring includes a circular sleeve 120 depending from said peripheral wall 104 and a thin ring attached to the sleeve via a plurality of frangible bridges 122 provided at the upper edge of the sleeve, wherein the inner surface of the thin ring has a plurality of projections 124 configured on the inner surface thereof. A circular seal 112 configured to make the contents of the pharmaceutical container hermetically sealed on tightening the closure 100 thereon. The circular seal 100 has a convex portion 114 bulging towards the tamper-evident ring 120 for this purpose. This seal 112 is depending from the flat lid 102 and is disposed immediately inwards from the depending peripheral wall 104. The combination of the convex portion 114 and the projections 124 secure the closure 100 on the pharmaceutical container (not shown). A thin profiled web 130 of a plurality of spiraling arms 132 (Figure 2a-2c), e.g. five in number in the present case, also depends from the flat lid 102.

These arms 132 join a ring 134 which can rest on the product contained in the container (not shown) for holding the same in place therein. This web 130 is disposed between the seal 112 and the desiccant chamber 106. A notch or indentation 116 is made on the side just below the flat lid 102 for facilitating the easy opening of the closure 100 from the pharmaceutical container. Figure 2a shows a perspective view of the closure 100 for a pharmaceutical product container configured in accordance with the present invention. The peripheral wall 104 is also provided with a plurality of, e.g. at least two circular serrations 136 (Figure 2a) for proper grip on the closure 100 for opening and closing the same from/on the pharmaceutical container (not shown). The inner surfaces of the arms 132 and the circular ring 134 are flush with each other and the outer surface of the arms 132 are configured convex. The tapered pairs of projections 124 are also visible here.
Figure 2b shows another perspective view of the closure for a pharmaceutical product container configured in accordance with the present invention. This figure clearly shows the frangible bridges 124 and the indentation 116 formed on the side of the peripheral wall 104. The joining of the five arms 132 having convex outer surface with the circular ring 134 as well as their inner surfaces being flush with each other are also clearly visible here.
Figure 2c shows yet another perspective view of the closure 100 for a pharmaceutical product container configured in accordance with the present invention. It shows in details the serrations 136 formed on the peripheral wall 104, frangible bridges 122 provided as tamper-evident means on first opening of the closure 100 from the pharmaceutical container. The desiccant chamber 106 and arms 132 connected to the circular ring 134 and both depending from the flat lid 102 are also clearly seen here.
Figure 3 shows a side-view of the closure for a pharmaceutical product container configured in accordance with the present invention, in which all five spiraling arms 132 are seen attached to circular ring 134.

Figure 4 shows a partial view of the top portion of the closure for a
pharmaceutical product container configured in accordance with the present
invention. It also shows the serrations 136 formed on the peripheral wall 104,
frangible bridges 122, the desiccant chamber 106 and arms 132 depending
from the flat lid 102. The tapered pairs of projections 124 are visible here as
well.
TECHNICAL ADVANTAGES AND ECONOMIC SIGNIFICANCE
The closure for a pharmaceutical product container configured in accordance with the present invention has the following advantages:
• Prevents moisture ingress.
• Acts as tamper-evident closure.
• Facilitates secure locking on the mouth of the container.
• Holds in place the products in the container.
• Ensures effective sealing on the mouth of the container.
• Prevents clandestine replacement of original products by harmful and/or low-quality spurious products.
Throughout this specification the word "comprise", or variations such as "comprises" or "comprising", shall be understood to implies including a described element, integer or method step, or group of elements, integers or method steps, however, does not imply excluding any other element, integer or step, or group of elements, integers or method steps. In the claims and the description, the terms "containing" and "having" are used as linguistically neutral terminologies for the corresponding terms "comprising".
The use of the expression "a", "at least" or "at least one" shall imply using one or more elements or ingredients or quantities, as used in the embodiment of the disclosure in order to achieve one or more of the intended objects or

results of the present invention. Furthermore, the use of the term "one" shall not exclude the plurality of such features and components described.
The description provided herein is purely by way of example and illustration. The various features and advantageous details are explained with reference to this non-limiting embodiment in the above description in accordance with the present invention.
The descriptions of well-known components and manufacturing and processing techniques are consciously omitted in this specification, so as not to unnecessarily obscure the specification.
In the previously detailed description, different features have been summarized for improving the conclusiveness of the representation in one or more examples. However, it should be understood that the above description is merely illustrative, but not limiting under any circumstances. It helps in covering all alternatives, modifications and equivalents of the different features and exemplary embodiments.
Many other examples are directly and immediately clear to the skilled person because of his/her professional knowledge in view of the above description. Therefore, innumerable changes, variations, modifications, alterations may be made and/or integrations in terms of materials and method used may be devised to configure, manufacture and assemble various constituents, components, subassemblies and assemblies according to their size, shapes, orientations and interrelationships.
While considerable emphasis has been placed on the specific features of the preferred embodiment described here, it will be appreciated that many additional features can be added and that many changes can be made in the preferred embodiments without departing from the principles of the invention.
These and other changes in the preferred embodiment of the invention will be • apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation.

The exemplary embodiments were selected and described in order to be able to best represent the principles and their possible practical application underlying the invention. Thereby, the skilled persons can optimally modify and use the invention and its different exemplary embodiments with reference to the intended use.
We claim
1. A closure for a pharmaceutical product container, the closure comprises:
(i) a flat lid of the closure;
(ii) a peripheral wall depending from the edge of said flat lid;
(iii) a chamber for storing desiccant such as silica gel, also depending from said flat lid;
(iv) a thin profiled web depending from the flat lid and resting on the product contained in the container for holding the same in place within the container;
(v) a circular seal configured to make the contents between the depending peripheral wall and the desiccant chamber; and
(vi) a tamper-evident ring;
wherein the tamper-evident ring includes a circular sleeve depending from said peripheral wall and a thin ring attached to the sleeve via a plurality of frangible bridges provided at the upper edge of the sleeve, wherein the inner surface of the thin ring has a plurality of projections configured on the inner surface thereof.
2. Closure as claimed in claim 1, wherein the peripheral wall comprises parallel circular engravings for providing a grip on the closure.
3. Closure as claimed in claim 2, wherein the peripheral wall further comprises an external indentation or recess configured under the top

circular engraving for providing a tab for opening the closure from the container.
4. Closure as claimed in claim 1, wherein the frangible bridges are attached to the thin ring at positions between the tapered inner projections configured thereon.
5. Closure as claimed in claim 1, wherein the circular seal is configured substantially convex on upper top outer surface thereof and the circular seal is disposed adjacent the tapered projections for providing sealing of the closure in combination with the mouth of the pharmaceutical product container.
6. Closure as claimed in claim 1, wherein the thin profiled web is a web consisting of a plurality of thin spiraling arms configured depending from the flat lid and disposed between the circular seal and the desiccant chamber and connected to a circular ring to be supported on the top¬most layer of the product contained inside the pharmaceutical product container.
7. Closure as claimed in claim 6, wherein the internal surfaces of the spiraling arms and circular ring are configured flat and flush with each other.
8. Closure as claimed in claim 1, wherein a plurality of projections include two pairs of twin narrow projections facing each other and configured vertically tapering inwards from near the lower edge of the thin ring up to near the top edge of the thin ring and ending near the convex portion of the circular seal and two pairs of broad projections facing each other and configured vertically tapering inwards from near the lower edge of the thin ring up to near the top edge of the thin ring and ending near the convex portion of the circular seal.
9. Closure as claimed in claim 8, wherein the pairs of twin narrow projections and the pairs of broad projections are disposed at 90° with resoect to each other. _ _

10. Closure as claimed in claim 8, wherein the twin narrow projections include flat vertical outer faces and adjacently disposed broad projections include flat vertical faces facing each other for locking on container mouth and tapering outer faces for facilitating lateral movement for breaking frangible bridges on first opening of the closure from the pharmaceutical product container.