DESC:[0001] PRIORITY CLAIM
[0002] This application claims priority from the provisional application numbered 201641003123 filed with Indian Patent Office, Chennai on 28th January 2016 entitled “Cylindrical canister with a metal bottom and process for producing the same”, the entirety of which is expressly incorporated herein by reference.
[0003] Preamble to the Description
[0004] The following specification describes the invention and the manner in which is to be performed:
[0005] DESCRIPTION OF THE INVENTION
[0006] Technical field of the invention
[0007] The present invention describes a cylindrical canister with metal bottom. It reveals the use of the paper cup material i.e. ‘Cup Stock’ technology to manufacture the body of the cylindrical canister. A tin plate is used as bottom for the canister. The cap of the canister is prepared by blending High-density Polyethylene (HDPE) or any other injection molding grade plastic granules.
[0008] Background of the invention
[0009] Canisters are generally perceived by consumers as storage containers used for keeping food articles and other related items. Generally, such canisters are cylindrical in shape and made of paper, glass or metal with a metal or plastic lid. Canisters provide protection against drying of the food items. Conventional canisters are produced centrally by using either tinplate or winded paper composite for the body tube that adds significantly to the cost of manufacture.
[0010] Generally available disposable paper cups are used for serving beverages. These cups are made of paper and prevent liquid from leaking out or soaking through the paper by application of an extruded polyethylene layer. The paper used in preparing these disposable paper cups is called as “Cup-Board or Cup Stock”. These cup boards are made waterproof and may be fitted with various types of lids depending upon the usage of the cup-board.
[0011] The Patent Application WO2007042052 titled “Process for producing a combination packing container” discloses plastic container made with several materials like paper and plastic, directly or indirectly by many plastic processes. It allows the pack to be filled with liquids and has excellent barring properties and suitable for food and non-food materials. The pack may be printed with top quality printing. The bottom of the pack is made of tin lids and cap is made using paper i.e. foldable paper or carton. However, the invention disclosed in the prior art involves use of numerous materials and processing machines to manufacture the packing container thereby increasing the cost of manufacturing.

[0012] The US Patent US7311201 titled “Packing container for a bottled commodity” discloses a packing container, which is a hollow cylinder made from paper wherein the hollow area receives a bottled commodity. The container disclosed in the present prior art is capable of holding only bottles specifically designed for fitting in the container. Thereby, making this container unattractive for using of bottles of varying designs.

[0013] The US Patent US2438430 titled “Canister” discloses a novel method for manufacturing canister made up of non-metallic material involving simple, practical, and effective steps for uniting fibrous elements into a rigid and permanent relationship. However, the materials used in the disclosed prior art are susceptible for deformation and lose its strength. Thereby, making this canister not suitable for long term use.

[0014] Further, in existing canisters, the entire body along with cap, and bottom plate is made of tin that makes these canisters not only expensive, but is also heavy in nature. These days, a large number of canisters are used by the manufacturers to store the products. Generally, the appearance of the canisters doesn’t appeal to the customer due to unattractive look and feel of the canister, which is one of the most important features to sell the products.

[0015] Hence, looking at the problems in the prior art, there is a need for a cost effective and light weight canister, which appears to be more appealing and attractive with embossing patterns and better print surface structure.

[0016] Summary of the invention
[0017] The present invention discloses a cylindrical canister with a metal bottom and the process for producing the same. The canister of the present invention comprises a cylindrical body, a cylindrical metal bottom and a cap. The present invention also discloses a process for preparing the cylindrical body, cylindrical metal bottom and the cap.
[0018] In accordance with one embodiment of the present invention, the cylindrical body is made by feeding the flat printed sheets into a machine which wraps it on a collapsible mandrel which imparts cylindrical shape and then seals the side to form a tube. The cylindrical metal bottom, which is made of a tin plate, is further crimped with the cylindrical body at the bottom of the body. The cap is made from High-Density Polyethylene (HDPE) or any other injection molding grade plastic and is press fitted on the top of the cylindrical body.
[0019] According to another embodiment of the invention, the process for preparing the cylindrical metal body comprises of laminating the paper board with metalized 12 micron PET (Polyethylene Terephthalate) film on the smoother side of the board. The laminated boards are printed in an offset printing press using ultraviolet light curable ink and varnishes. The printed sheets are then embossed and cut into desired pack size based on the requirements. Further, the flat and cut printed boards are passed through a folding and gluing process through an automated line to form a cylindrical tube.
[0020] According to another embodiment of the invention, the process for preparing the cylindrical metal bottom comprises of lacquering the tin plates on both sides. This is followed by cutting the lacquered plates into smaller strips by using a mechanized guillotine. Further, the strips are fed into a mechanical punching press, which forms the cylindrical shape of the bottom.
[0021] According to another embodiment of the invention, the process of preparing the cap comprises of blending the High-density Polyethylene (HDPE) or any other injection molding grade plastic granules with the desired colour and the caps are formed by feeding the blend into an injection molding machine using desired custom molds.
[0022] The present invention thus provides a canister with superior quality that is more appealing and attractive with embossing patterns and better print surface topography. Further, the material used reduces significant transport and manufacturing cost.
[0023] It is to be understood that both the foregoing general description and the following details description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
[0024] Brief description of the drawings
[0025] The foregoing and other features of embodiments will become more apparent from the following detailed description of embodiments when read in conjunction with the accompanying drawings.
[0026] FIGURE 1 illustrates the exploded view of all three parts of the cylindrical canister with metal bottom, in accordance to one or more embodiments of the invention.
[0027] FIGURE 2 illustrates the top view of the cylindrical canister cap, in accordance to one or more embodiments of the invention.
[0028] FIGURE 2a illustrates the front view of the cylindrical canister, in accordance to one or more embodiments of the invention.
[0029] FIGURE 2b illustrates the bottom view of the cylindrical canister metal lid, in accordance to one or more embodiments of the invention.
[0030] FIGURE 3 illustrates the perspective view of the cylindrical canister with metal bottom, in accordance to one or more embodiments of the invention.
[0001] FIGURE 4 illustrates a flow chart for the process for preparation of cylindrical body.
[0002] FIGURE 5 illustrates a flow chart for the process for preparation of the cylindrical metal bottom.
[0003] FIGURE 6 illustrates a flow chart for the process for preparation of the cap.
[0031] Detailed description of the invention
[0032] Reference will now be made in detail to the description of the present subject matter, one or more examples of which are shown in figures. Each example is provided to explain the subject matter and not a limitation. Various changes and modifications obvious to one skilled in the art to which the invention pertains are deemed to be within the spirit, scope and contemplation of the invention.
[0033] The present invention describes use of canisters as a premium packaging option as compared to paper board cartons. The invention also describes a method of using the “Cup-Board” paper for forming the canister body. The industrial name of this paper board is “Cup Stock” technology, which is used in formation of canister body along with the metal bottom.
[0034] Also, aesthetically, a paper cup stock canister appears to be more appealing than a conventional canister as detailed embossing patterns can be achieved on its surface due to better print surface topography.
[0035] FIGURE 1 illustrates the exploded view of all three parts of the canister (100). The cup-board canister (102) is combined by feeding the flat printed sheets into the machine, which wraps it on a collapsible mandrel, which imparts cylindrical shape and then seals the side to form a tube. The bottom tin plate (103) is crimped into cylindrical tube using a crimping machine and the caps (101) are fitted manually to complete the assembly, in accordance to one or more embodiments of the invention.
[0036] FIGURE 2 illustrates the top view of the canister cap, in accordance to one or more embodiments of the invention.
[0037] FIGURE 2a illustrates the front view of the cylindrical canister. The canister body is made up of special grade of paper board having a 15 GSM or suitable GSM coating of polyethylene on one side, which also acts as sealant, in accordance to one or more embodiments of the invention.
[0038] FIGURE 2b illustrates the bottom view of the metal lid. Metal used in formation of the bottom lid is tin, preferably. These tin plates are lacquered on both sides. Lacquer coating imparts the gold shade and also improves resistance against corrosion, in accordance to one or more embodiments of the invention.
[0039] The present invention gives the canister a very attractive appearance by providing an ornamental space for storing the bottle. The bottle may contain any liquid or semi-liquid but the canister is preferable for using bottles containing liquor. The bottle is easily removable from the base for use by lifting the bottle in the upward direction and the same is reinsertable back to its original fixed position to the base.
[0040] FIGURE 3 illustrates the perspective view of the cylindrical cup-board canister, in accordance to one or more embodiments of the invention.
[0041] In the preferred embodiment of the present invention, the bottom metal plate is made of 0.26 Millimeter (mm) or any other suitable thickness thick tin plate and the bottom tin plate is crimped on a 400 Grams per Square Metre (GSM) or any suitable GSM, or any suitable grade board or board laminate cylindrical body.
[0042] FIGURE 4 illustrates the flow chart for the process (400) of preparation of the cylindrical body. The process (400) of preparation of the cylindrical body starts at step (401) of laminating a paper board with metalized 12 micron PET (Polyethylene Terephthalate) film on the smoother side of the paper board. At step (402), the laminated boards are printed in an offset printing press using ultraviolet light curable ink and varnishes. At step (403), the printed sheets are then embossed and cut into sizes specified for each pack size, wherein the size of the pack varies based on the requirement. At step (404), the flat and cut printed boards are passed through a heat sealing process, in which the important part is removal of sealed tube from the core, in a paper cup being truncated cone shaped the removal becomes easy because of the angle and difference in diameters of core at both ends. In case of cylindrical core, the same is difficult. The current invention covers the use of collapsible core for removal of tube after sealing. The collapsible core collapses inside and reduces the diameter to make removal easy. The process can be automatic, semiautomatic or manual.
[0043] In the preferred embodiment of the present invention, the assembly of all the components of the canister i.e. the flat and cut printed boards, metal bottom plate and the cap is assembled at a single point, which is closer to the unit/factory wherein the canisters are used to pack the final product. This arrangement reduces the cost of transportation as compared to conventional canisters in which the canister is normally assembled to formed shape at the central point and then transported to various locations where the canisters are used to pack the final product. This process involves high transportation cost as the canister is transported in formed shape, which occupies more space.
[0044] In the present invention, the final assembly of all the components of the cylindrical canister is performed at locations closer to the respective units manufacturing the final products to be packed inside the canister. Hence, this arrangement reduces the cost of transportation.
[0045] FIGURE 5 illustrates the process (500) of preparation of the cylindrical bottom plate. The process (500) for preparation of cylindrical metal bottom plate starts step (501) of lacquering the tin plates on both side, wherein the lacquer coating gives the gold shade as per the requirement and also improves resistance against corrosion. At step (502), the lacquered tin plates are cut into plurality of smaller strips by using a mechanized guillotine (105). At step (803), the strips are fed into a mechanical punching press, which forms the cylindrical shape of the bottom (106).
[0046] FIGURE 6 illustrates the process (600) for preparation of the cap. The process (600) for preparation of the cap starts at step (601) by blending High-density Polyethylene (HDPE) granules or any other injection molding grade plastic granules with color. At step (602), the blend is fed into an injection molding machine for forming the caps using custom molds.

[0047] All the parts of the canister are manufactured individually at separate locations and are assembled together at units nearby to the respective units of manufacturing the final product to be packed inside the canister, in an automatic or semi-automatic machine.
[0048] The present invention thus describes a final assembly of all the components of the cylindrical canister at single location, which lends itself to ‘corner shop’ arrangement that significantly leads to cost reduction during the time of manufacturing and scale advantage, enables substantial material savings, portability of the final assembly and also reduces the cost of transportation.
,CLAIMS:We Claim:
1. A cylindrical canister (100) with a metal bottom, the canister (100) comprising:
a. a cylindrical body (102), wherein the cylindrical body is made of paper board;
b. a cylindrical metal bottom (103), wherein the cylindrical metal bottom (103) is crimped with the cylindrical body (102); and
c. a cap (101), wherein the cap (101) is fitted to the cylindrical body (102) at the top. The canister (100) as claimed in claim 1, wherein the cylindrical body (103) is made of paper board having a 15 GSM coating of polyethylene on one side.
2. The canister (100) as claimed in claim 1, wherein the cylindrical bottom plate (103) is crimped with the cylindrical body (102) using a crimping machine.
3. The canister (100) as claimed in claim 1, wherein the cylindrical bottom plate (103) is made of tin.
4. The canister (100) as claimed in claim 1, wherein the cap (101) is made of High-density Polyethylene (HDPE) and is press fitted on top of the cylindrical body (102).
5. A process for preparing the cylindrical body, the process (400) comprising the steps of:
a. laminating a paper board on a smoother side of the paper board (401);
b. printing one or more laminated boards in an offset printing press using ultraviolet ray curable ink and varnish (402);
c. embossing one or more printed sheets and cutting into desired pack size, wherein the size of the pack varies based on the requirement (403); and
d. passing one or more flat and cut printed boards through a folding and gluing process through an automated line to form a cylindrical tube (404).
6. The process as claimed in claim 5, wherein the paper board is laminated with metalized 12micron PET (Polyethylene Terephthalate).
7. A process for preparing the cylindrical metal bottom, the process (500) comprising the steps of:
a. lacquering one or more tin plates on both sides of the plate (501);
b. cutting the lacquered plates into plurality of smaller strips by using a mechanized guillotine (502); and
c. feeding one or more strips into a mechanical punching press to form the cylindrical shape of the bottom (503).
8. A process for preparing the cap, the process (600) comprising the steps of:
a. blending High-density Polyethylene (HDPE) or any other injection molding grade plastic granules with the desired colour (601); and
b. feeding the blend into an injection molding machine using custom mold to form the cap (602).