Title of Invention

A DEVICE FOR PIERCING WRAPPING PAPER

Abstract

The prsent invention relates to a device for preparing the surface of wrappers used for packing products and more particularly, the present invention provides a device for piercing wrapping paper,said device comprising a piercing roller having a plurality of piercing needles provided on the outer periphery,a pressure roller having plurality of cavities formed and beibg located either below or above the piercing roller, wherin the size and shape of the cavities are such that the needles traverse through the cavities without coming in contanct with the same, and the wrapper to be pierced being made to pass between the two rollers.

Full Text

FORM 2 THE PATENTS ACT, 1970 (39 of 1970) COMPLETE SPECIFICATION (See section 10) "DEVICE FOR PIERCING THE SURFACE OF PACKING WRAPPER" MULTI PACK SYSTEMS PVT. LTD., an Indian Company of 2nd Floor, Paqtriot Complex, Ellora Park, Baroda, Gujarat 390 007, India. The following specification specifically describes the nature of the invention. ORIGINAL 309/MUM/2002 1/4/2002 Field of the Invention: The present invention relates to a device for piercing the surface of wrappers used for packing products. More particularly, the present invention provides a device for piercing wrapping paper, said device comprising a piercing roller having a plurality of piercing needles provided on the outer periphery, a pressure roller having plurality of cavities formed and being located either below or above the piercing roller, wherein the size and shape of the cavitiesare such that the needles traverse through the cavities without coming in contact with the same, and the wrapper to be pierced being made to pass between the two rollers. Brief Description of the Accompanying Drawings: Figure 1 represents the prior art device used for piercing the wrapper. Figure 2 represents the device of the present invention for piercing wrapper wherein continuous vertical cavities are formed on the periphery of the pressure roller. Figure 3 represents the pressure roller of the invention according to yet another embodiment wherein discrete cavities are formed on the periphery of the pressure roller. Figure 4 represents the pressure roller of the invention wherein continuous horizontal cavities are formed on the outer periphery of the pressure roller. Figure 5 represents the different shape of the cavity on the pressure roller. Background and Prior Art to the Invention: The existing mechanism of piercing is described below: The device comprises of two rollers which are rotating together parallel to each other and the wrapper on which the piercing is to be done is made to pass between these two rollers. One of the rollers is a piercing roller. Said piercing roller is made of metal. The piercing roller has plurality of stainless steel needles formed on the outside periphery and these needles are protruding outside the roller diameter. The other roller which is rotating parallel to the piercing roller is called pressure roller and is generally made of rubber or felt material. In the prior art system, the wrapper on which piercing operation is required to be done is made to pass through the piercing roller and the pressure roller. The needles fitted on the piercing roller pierce the surface of wrapper by developing pressure against the pressure roller. The needles subsequently penetrate into the pressure roller after piercing the wrapper. The Needles have to penetrate into the peripheral material of the pressure roller resulting in the damage of the pressure roller. The existing mechanism of piercing device is explained in Figure 1, accompanying the specification. Limitations and Problems in the Existing Mechanism: The following are the major limitations and problems which are being faced during piercing process. 1. The p ressure r oiler b eing s olid flat from o utside d iameter, the n eedles o f p iercing roller penetrate into throughout the peripheral material resulting in damage of entire the outer surface of the pressure roller. 2. The pressure roller needs to be replaced frequently because of damage due to penetration of needles Also, the needles require constant replacement. 3. High pressure is required for piercing of the wrapper, since the needless have to penetrate into the material of pressure roller after piercing operation. 4. Piercing operation is not much effective. Thus there exist a need to develop a device which obligates the aforesaid disadvantages. Objects of the Invention: The main object of the present invention is to develop a device for piercing wrappers which obligates the aforesaid disadvantages. More particularly, the object of the present invention is to develop a pressure roller which obliviates the aforesaid disadvantages. Summary of the Invention: The present invention provides a device for piercing Wrapping paper, said device comprising a piercing roller having a plurality of piercing needles provided on the outer periphery, a pressure roller having plurality of cavities formed and being located either below or above the piercing roller, wherein the size and shape of the cavities are such that the needles traverse through the cavities without coming in contact with the same, and the wrapper to be pierced being made to pass between the two rollers. Detailed description of the Present Invention: Accordingly, the present invention provides a device for piercing wrapping paper, said device comprising a piercing roller having a plurality of piercing needles proviaed on the outer periphery, a pressure roller having plurality of cavities formed and being located either below or above the piercing roller, wherein the size and shape of the cavnies .are such-that , the needles traverse through the cavities without coming in contact with the same,'and the wrapper to be pierced being made to pass between the two rollers. In an embodiment of the present invention, the location of the cavities on the pressure roller are corresponding to the location of the needles on the piercing roller. In yet another embodiment of the present invention, the cavities are in the form of continuous horizontal slots or continuous vertical slots or discrete slots. In still another e mbodiment of the present invention the cavities of any suitable size and shape are formed by making grooves, depression or by any other conventional process which will make the needles to penetrate into open empty space of cavities. In one more another embodiment of the present invention the pressure roller and the piercing roller are be operated at unequal speeds if continuous vertical cavities are formed on the periphery of the pressure roller. In one another embodiment of the present invention the pressure roller and the piercing roller are operated synchronously if continuous vertical or discrete cavities are formed on the periphery of the pressure roller. In a further embodiment of the present invention, horizontal alignment of the piercing roller is fixed with respect to the pressure roller having continuous vertical cavities and discrete cavities. In an embodiment of the present invention, horizontal alignment of the p iercing roller is variable with respect to the pressure roller having continuous horizontal cavity. In another embodiment of the present invention, the horizontal length of the pressure roller is less than or equal to or greater than the length of the piercing roller. In yet another embodiment of the present invention, the needles of piercing roller will pierce the surface of wrapper and then penetrate into open empty space of cavities of pressure roller. In still another embodiment of the present invention, the non-cavity area on the pressure roller provides sufficient surface contact between the wrapper and the pressure roller. In one more embodiment of the present invention, the pressure roller is designed' iri such a way that the wrapper gets sufficient grip resulting into effective piercing of wrapper without getting inserted into open empty space of cavities of pressure roller. In one embodiment of the present invention, the non-cavity area can be rugged or smooth. In a further e mbodiment of the present invention, the cavities are in the form of square, rectangular, semicircle, semi ellipse or a triangle. In an embodiment of the present invention, the size of the cavity is at least equal to 55% the length of the needle. In another embodiment of the present invention, the depth of penetration of the needle inside the cavity is at least equal to 50% of length of the needle. In yet another embodiment of the present invention, the pressure roller is designed in such a way that the needles of the piercing roller do not require frequent replacement. In still another embodiment of the present invention, the pressure roller is designed in such a way that the needles penetrate very easily through the wrapper without applying significant pressure for piercing. The concept of designing the pressure roller, having cavities on periphery having following advantages and disadvantages. The advantage of the continuous Horizontal cavity: 1. Horizontal alignment of the piercing roller can be variable with respect to pressure roller. 2. Piercing roller does not require precise alignment with pressure roller. 3. If we increase the length of pressure roller and make it greater than the piercing roller in which the cavities are being along with the length of pressure roller then at a single time two or more piercing rollers can aligned with a single pressure roller and two or more wrapping strip can be feed separately between these two or more sets of rollers arrangement simultaneously piercing operation performed rapidly and which further enhance the per day production. 4. Width of the wrapper being cut can be varied by varying the horizontal distance between two adjacent needles. The disadvantage of the continuous horizontal cavity: 1. The wrapper does not get sufficient non cavity area for holding the wrapper and performing the accurate piercing. 2. Piercing roller need to be operating synchronously with the pressure roller. The advantage of the continuous Vertical cavity: 1. Piercing roller need not be operating synchronously with the pressure roller. 2. The peripheral distance between two adjacent needles can be varied. 3. The length of the wrapper cut can be varied by varying the peripheral distance between two adjacent needles. The disadvantage of the continuous Vertical cavity: 1. Piercing roller require precise alignment with pressure roller. The advantage of the discrete cavity: 1. Maximum non-cavity area for holding the wrapper is available. 2. Accurate piercing of the wrapper is possible. 3. Due to the availability of sufficient non-cavity area, lesser pressure is required for the needles of the piercing roller to pierce the wrapper. The disadvantage of the discrete cavity: 1. Piercing roller require precise alignment with pressure roller. 2. Piercing roller must be operated synchronously with the pressure roller. The concept of designing the pressure roller having cavities on periphery will do the following functions. 1. The needles of piercing roller will pierce the surface of wrapper and then penetrate into open empty space of cavities of pressure roller. The piercing rollers needles must not come in contact with the base part and side edges of the cavities. So in order to avoid this contact between the piercing needles and cavities, the cavities formed are wide and deep enough preferably at least equal to 55% of the length and width of the needle and the depth of penetration of the needle inside the cavity is at least equal to 50% of the length of the needle. This clearance not only avoid the contact between the piercing needles and cavities, but also enhances the effectiveness of piercing operation, life of piercing needles and the retain the size shape of the cavities and there is no need to replace the piercing needle or the pressure roller frequently because there would be no chance of loosing sharpness of piercing needles or discontinuous shape of the cavities. If this clearance is not available here then it may cause sever problems like a) Over sizing of cavities: - due to this problem the shape of cavities will become deform at the outer edges, which will reduce the tension needed to hold the wrapping paper and affect the quality of pierced wrapper. b) The sharpness of piercing needles may get disrupt which further effect the quality and the speed of cutting and increase the time and cost involvement in cutting and subsequently arises the requirement of frequent replacement of piercing needles. 2. Since, there is sufficient surface contact area of non cavity material of pressure roller, the wrapper gets sufficient grip resulting in effective piercing of wrapper without getting inserted into open empty space of cavities of pressure roller. In the absence of sufficient surface contact area between the wrapping paper and pressure roller it is very difficult impossible to pierce the wrapping paper even if the wrapper is pierced proper shape is not obtained. 3. The sufficient grip of the wrapper depends on both non cavity area and the surface condition of non cavity area. The surface conditions of the non cavity area can be either highly smooth or rugged or an optimum combination of both. If the surface conditions of the non cavity area is highly smooth, then wrapper get slipped from the pressure roller. If the non cavity area is highly rugged then wrapper get impression of the rugged surface and the printing matter on the wrapper and appearance of the wrapping paper get disrupt. So in order to get proper piercing one should have optimum balance between the smoothness and roughness of one non cavity area. 4. Because there is no material in the cavities of pressure roller, the needles penetrate very easily without need of any significant pressure for piercing of the wrapper. The cavity can be in any suitable shape such as square, rectangular, semicircle, semi ellipse or triangle, for piercing operation. The size and shape of cavity depends on the size and shape of the piercing needles. However, the applicants have found that the cavities which have the shape of triangle or semi ellipse provides the best results. Figure 2 shows the device of the present invention wherein continuous vertical cavities are formed on the periphery of the pressure roller. Figure 3 shows another embodiment of the present invention, wherein discrete cavities are formed on the periphery of the pressure roller at locations corresponding to the locations where needles are formed on the piercing roller. Figure 4 represents the pressure roller of the invention wherein continuous horizontal cavities are formed on outer periphery of the pressure roller. Figure 5 represents the different shape of cavities on the pressure roller. Advantages of the present Invention: 1. Very effective piercing is achieved. 2. The needles of piercing roller do not have to penetrate the material of pressure roller for piercing the wrapper. 3. The pressure required for piercing operation is very less. 4. The material of pressure roller does not get damaged because there is no penetration of needles. 5. Pressure roller does not require to be replaced. WE CLAIM: 1. A device for piercing wrapping paper, said device comprising a piercing roller having a plurality of piercing needles provided on the outer periphery, a pressure roller having plurality of cavities formed and being located wither below or above the piercing roller, wherein the size and shape of the cavities are such that the needles traverse through the cavities without coming in contact with the same, and the wrapper to be pierced being made to pass between the two rollers. 2. A device as claimed in claim 1, wherein the locations of the cavities on the pressure roller are corresponding to the location of the needles on the piercing roller. 3. A device as claimed in claim 1, wherein the cavities are in the form of continuous horizontal slots or continuous vertical slots or discrete slots. 4. A device as claimed in claim 1, wherein the cavities of any suitable size and shape are formed by making grooves, depression or by any other conventional process which will make the needles to penetrate into open empty space of cavities. 5. A device as claimed in claim 1, wherein if continuous vertical cavities are formed on the periphery of the pressure roller, the pressure roller and the piercing roller are configured to be operated at unequal speeds. 6. A device as claimed in claim 1, wherein if continuous horizontal or discrete cavities are formed on the periphery of the pressure roller, the pressure roller and the piercing roller are configured to be operated synchronously. 7. A device as claimed in claim 1, wherein horizontal alignment of the piercing roller is fixed with respect to the pressure roller having continuous vertical cavities and discrete cavities. 8. A device as claimed in claim 1, wherein horizontal alignment of the piercing roller is variable with respect to the pressure toller having continuous horizontal cavities. 9. A device as ciaimed in clafm I, wherein the horizontai iength of the pressure roller is less than or equal to or grater than th: length of the piercing roller. 10. A device as claimed in claim 1, wherein the needles of piercing roller are configured to pierce the surface of wrapper and then penetrate into open empty space of cavities of pressure roller. 11. A device as claimed in claim 1, wherein the non-cavity area on the pressure roller provides sufficient surface contact between the wrapper and the pressure roller. 12. A device as claimed in claim 8, wherein the pressure roller is constructed such that the wrapper gets sufficient grip resulting in effective piercing of wrapper without getting inserted into open empty space of cavities of pressure roller. 13. A device as claimed in claim 1, wherein the non-cavity area can be rugged or smooth. 14. A device as claimed in claim 1, wherein the cavities are in the form of square, rectangular, semicircle, semi ellipse or a triangle. 15. A device as claimed in claim 1, wherein the size of the cavity is at least equal to 55% the length of the needle. 16. A device as claimed in claim 1, wherein the depth of penetration of the needle inside the cavity is at least equal to 50% of length of the needle. Dated this 31st Day of March, 2002. G. DEEPAK SRINIWAS Of K & S PARTNERS ATTORNEY FOR THE APPLICANTS

Documents:

309-mum-2002-abstract(09-06-2003).doc

309-mum-2002-abstract(09-06-2003).pdf

309-mum-2002-cancelled pages(10-03-2008).pdf

309-mum-2002-claims(granted)-(09-06-2003).doc

309-mum-2002-claims(granted)-(09-06-2003).pdf

309-mum-2002-correspondence(ipo)-(10-04-2008).pdf

309-mum-2002-correspondence-1-(11-03-2008).pdf

309-mum-2002-correspondence-2-(19-10-2005).pdf

309-mum-2002-drawing(11-03-2008).pdf

309-mum-2002-form 1(01-04-2002).pdf

309-mum-2002-form 1(01-06-2003).pdf

309-mum-2002-form 1(11-03-2008).pdf

309-mum-2002-form 13(06-02-2006).pdf

309-mum-2002-form 13(11-03-2008).pdf

309-mum-2002-form 18(06-02-2006).pdf

309-mum-2002-form 2(granted)-(09-06-2003).doc

309-mum-2002-form 2(granted)-(09-06-2003).pdf

309-mum-2002-form 2(provisional)-(01-04-2002).pdf

309-mum-2002-form 26(06-02-2006).pdf

309-mum-2002-form 26(31-05-2002).pdf

309-mum-2002-form 3(01-04-2002).pdf

309-mum-2002-form 4(09-06-2003).pdf

309-mum-2002-form 5(09-06-2003).pdf

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