Paste dispensing nozzle for controlled paste dispensing

Abstract

Present invention discloses paste nozzle assembly (100) designed to fit inside the front opening of the tube, consisting of collar (101) and nozzle portion extending from collar. Below the collar (101), there are series of stepped cylindrical portions (102, 103 & 104) over nozzle portion and the first step (102) is positioned below the collar (101), and each subsequent step is positioned below the preceding step. The number of steps are determined according to the length of the nozzle assembly (100). The base of the tube is chamfered, the chamfer has a length of 0.5mm, angled at 45°. The chamfer's outer diameter is 9.9mm and its purpose is to improve the alignment and sealing of the nozzle with the paste tube, facilitating smooth operation and preventing leakage during dispensing.

Description

[0001] PASTE DISPENSING NOZZLE FOR CONTROLLED PASTE DISPENSING

[0002] FIELD OF INVENTION

[0003] The present invention generally relates to the field of dispensing nozzle. More particularly, it pertains to a paste dispensing nozzle with stepped cylindrical design for controlled paste dispensing. The nozzle is particularly focused on ensuring controlled dispensing of paste, preventing its overuse and ensuring ease of use.

[0004] BACKGROUND OF THE INVENTION

[0005] The following background includes information which is important for the better understanding of the present invention.

[0006] Paste tubes with conventional nozzles often dispense larger quantities of paste than necessary, leading to excessive use and waste. Dispensing excessive amounts of paste can lead to both practical and health-related issues. Many pastes contain fluoride, which is beneficial in small doses but harmful in large quantities. If children swallow too much fluoride, it can cause "fluorosis", leading to tooth discoloration or damage. Additionally, using more paste than needed results in quicker consumption, meaning the user needs to buy paste more often. A pea-sized amount is typically recommended for adults, with even less for children. Using too much paste can also make it harder to rinse thoroughly, potentially leaving behind residue that may cause irritation or an unpleasant sticky sensation. Moreover, some pastes contain abrasive agents to remove plaque, overuse of which can wear down enamel, increasing tooth sensitivity. Sticking to the recommended amount helps prevent these issues, promoting better dental health and hygiene.

[0007] Minimizing paste usage not only reduces waste and saves money, but also helps in preventing potential health risks associated with overuse. Dentists generally recommend that adults should use a pea-sized amount of paste, while for children under six, a rice-grain-sized amount is sufficient. However, extracting such small amounts from conventional paste tubes can be challenging, as their nozzles are typically larger, dispensing more paste than needed. Although smaller nozzle openings or dispensing units could help to control the amount, but such tubes are not widely available, creating inconvenience for users. Manual methods, such as carefully controlling the amount by squeezing lightly, educating children on proper usage, or using wall- mounted manual dispensers, can be helpful but are often difficult to consistently follow. Accidental overuse, especially when rushing, remains a common problem, while using these techniques.

[0008] Thus in view of aforementioned drawbacks, there was a need to develop certain devices and techniques, which could control the amount of the paste being dispensed from the paste tube.

[0009] Currently, a number of paste reducers, nozzles, dispensers are available which address the aforesaid problem and control the amount of paste to be dispensed. However, most of the nozzles are to be attached externally over the tip of the paste tube, as these nozzle can collect paste residue, dust and bacteria over time leading to contamination and unhygienic practices, further, external nozzles are more prone to clogging, if paste dries up at the tip, which will block the flow, external nozzles further makes the tube harder to squeeze and are more likely to get damaged, detached or loss and their regular use can also wear down the attachment leading to leaks or loose fittings, these drawbacks can reduce convenience and user satisfaction over time. Hence, there was immense need for development of such nozzles, which are devoid of these aforementioned drawbacks.

[0010] Innovative approach by present invention

[0011] To address the drawbacks associated with dispensing of large amount of paste and also to overcome the drawbacks associated with aforementioned nozzles, the inventors of present invention discloses, a paste dispensing nozzle, which dispenses the paste in reduced amount in contrast to the amount dispensed by conventional paste tubes. The paste dispensing nozzle is designed in such a way, that it fits inside the front opening of the paste tube. As the same is capable of fitting inside the tube of the paste, thus overcomes the drawbacks associated with the external fitment nozzles. The present invention discloses a nozzle design that includes stepped cylindrical portions to regulate flow, thereby offering precise control over the amount of paste dispensed per use. In summary, the inventors of the present invention have developed a novel paste dispensing nozzle. The invention offers an internal fitment design, ensuring seamless integration with the paste tube while providing a controlled and reduced amount of paste per application.

[0012] Present invention is not anticipated by prior art patents and non-patents literature, however related prior art is as below:

[0013] Prior art patents

[0014] Indian Patent Application No. 201621031988 discloses "Dispensing Nozzle for paste"

[0015] The above cited patent discloses a dispensing nozzle for paste that enables to dispense a smear layer (size of rice grain) and another nozzle which would dispense pea sized tooth paste. The dispenser has a neck having 1st end for mating with paste tube and 2nd extending end, a top having plurality of nozzles aligned with second end of the neck. Each of the nozzles sealingly engages with the second end of the neck when aligned therewith for establishing fluid communication between the engaged nozzle and the paste tube.

[0016] The design of the nozzle disclosed in present invention differs from the nozzle disclosed in aforementioned patent.

[0017] Indian Patent application no. 201941030554 discloses "Kids paste dispenser nozzle"

[0018] The aforementioned patent discloses a paste dispenser nozzle for kids consisting threads by which, it can fix on paste tube by removing the existing thread on cap, which dispenses contents of paste in different shapes including stars, flowers etc. The nozzle comprises a die cut thread on nozzle with internal channels, through which paste would be forced out by gentle squeeze in designer shapes.

[0019] The design and structure of nozzle disclosed in aforementioned patent differs from present invention. Further, the purpose of aforesaid patent is to engage children by dispensing paste in different appealing shapes, whereas the purpose of present invention is to control the amount of paste dispensing from the paste container.

[0020] Patent Application No. CN203143246U discloses "Paste tube connector" The aforementioned patent discloses a paste tube connector consisting of flat extrusion opening and internal threaded pipe opening connected to each other. The flat extrusion port is inclined towards middle and the cross section of the flat extrusion port is rectangular.

[0021] The threaded structure for paste nozzle as disclosed in present invention is also disclosed in aforesaid patent, however the nozzle disclosed above will be placed over the paste container by replacing the cap, whereas the nozzle of present invention will be fitted inside the container and has threaded structure / steps on the outer surface.

[0022] Patent Application No. CN213110528 discloses "Anti-skid paste nozzle"

[0023] The patent describes an anti-slip paste nozzle, consisting of a paste tube mouth featuring a hollow circular tube and a specialized extrusion device. The extrusion device, designed for dispensing paste, is attached to the tube mouth and has a cross-section in the shape of either a pentagram or a heart. The nozzle's end cover includes a central extrusion hole, which also follows a pentagram or heart-shaped cross-section. Additionally, the nozzle features an inner chamfer angled at 60 degrees on one end of a straight cylindrical part, which is located away from a circular ring portion. The nozzle also includes a top cap with an inner wall equipped with an internal thread and an outer wall featuring an external screw thread.

[0024] The design and structure of nozzle disclosed in aforementioned patent differs from present invention. Further, the purpose of aforesaid patent is to dispense paste in different appealing shapes, whereas the purpose of present invention is to control the amount of paste dispensing from the paste container.

[0025] Patent Application no. US6722536B2 discloses "Nozzle for dispensing viscous material"

[0026] The aforementioned patent discloses a nozzle designed for dispensing viscous materials, such as dental adhesive or paste, from a container. The nozzle features a rectangular or elliptical dispensing orifice with radiused corners in rectangular design and a minor axis of about 50% of the major axis in elliptical designs. It further consists a nozzle throat, a transition section, an exterior cylindrical surface with threads and orifice with cross sectional area ranging between 0.02 and 0.03 inches and about 50% width to length ratio. The cross sectional area of the container (A) is between 2 -3 times the area of the nozzle (B) and area of nozzle throat is 25-30 times the area of dispensing orifice (C). The extremity of the orifice is angled greater than 90o relative to the direction of flow. The nozzle further includes a cylindrical exterior with three parallel threads that start at equally spaced points around the circumference. These threads are spaced at 120 degrees and have a pitch of 0.25 inches (4 threads per inch).

[0027] Present invention features a nozzle designed to be fitted inside the cap or tip of the paste tube, with the steps of various diameters located on the interior. Unlike the cited patent, where the nozzle fits over the outside of the paste tube, the nozzle in the present invention is inserted within the tube's cap for secure attachment and effective dispensing.

[0028] Patent Application No. CN101830310 discloses "Paste tube with serrated nozzle"

[0029] The aforementioned patent describes a paste tube equipped with a serrated nozzle. This tube features a flexible body with an internal cavity and a circular discharge opening, which includes tooth-like serrated protrusions around its edge to enable precise dispensing of paste or other materials. The serrated protrusions are positioned at the port of the discharge hole, which is part of a screw-on sleeve attached to the extrusion head. These protrusions are integrally formed with the inner side wall of the discharge hole and are connected to the screw-on sleeve. The crosssection of each serrated protrusion takes the shape of an isosceles trapezoid, with the longer side forming the outer edge and the shorter side forming the inner edge.

[0030] The design and structure of both nozzles differs from each other.

[0031] Patent Application No. CN220032704U discloses "Paste box cover"

[0032] A paste tube cap consisting a cap body including cylindrical cover and nozzle made of an elastic material, silicon. The nozzle include a flat-shaped spray mouth and annular fitting step. The nozzle is hollow and the top of the cover has a circular hole and annular groove. The interior of the cover is provided with an adjustment ring and fixing device arranged between adjustment ring and cover for fixing adjustment ring. The cover is fixedly connected to the adjustment ring via internal threads and outer side of adjustment ring has external threads matching the internal threads and the inner side of the adjustment ring has a fitting thread. Further, the tube cap consists a strip-shaped groove formed on the side wall of the cover for placing rotating strip. The outer side of the cover is also provided with anti-slip patterns and interior of the cover has a chamfer.

[0033] The structure of the nozzle disclosed in aforesaid patent, differs from nozzle disclosed in present invention.

[0034] Silvia Jose Chedid, Livia Maria Andalo Tenuta, Jaime Aparecido Cury; Dispensing Device to Deliver Small and Standardized Amount of Fluoride Dentifrice on the Toothbrush; Pesquisa Brasileira em Odontopediatria e Clfnica Integrada 2020; 20:e5300

[0035] The dispenser in cited article was developed to deliver amounts around 20 (green), 30 (blue), and 50 (red) mg of dentifrice on the toothbrush. The dispenser was attached to the dentifrice tube, and the lowest amount represents the length of fluoride dentifrice from the tip of the device to the green mark, whereas the largest is up to the red mark and the intermediate is up to the blue mark.

[0036] The dispensing device as disclosed in aforementioned article completely differs from the nozzle disclosed in present invention.

[0037] Lee Sanghyun, Bae Jae Hyeon and Lee Sangmin; Study of the Geometry and Wettability of Nozzles for Precise Ejection of High Viscous Liquids; Journal of the Korean Society of Manufacturing Process Engineers; Volume 20 Issue 12 / Pages.123-128 / 2021

[0038] The aforesaid article discloses nozzles with lower surface energies that reduced the ejection volume of droplets when a smaller nozzle diameter (0.21 mm in this study). The hydrophobic treatment of nozzle surfaces and the use of smaller nozzle diameters are critical factors enabling the use of highly viscous fluids in precision dispensing applications.

[0039] The above cited article just mentions the use of specific types of nozzles, however does not disclosed nozzle for paste dispensing as disclosed in present invention.

[0040] Colgate Paste Nozzle Reducer

[0041] Ref: https: / / www.printables.com / model / 753185-colgate-paste-nozzle-reducer The aforementioned product is a paste nozzle for reducing the amount of paste dispensing out from the tube. The paste nozzle has layer height of 0.20mm with nozzle diameter of 0.40mm, the same is made up of polylactic acid (PLA) with total weight of 2.00 g. The reducer of the large lid style is tapered to sit in the lid and reducer of small lid style has reducer outer walls are straight and is held in by the lid that sits on the flange. These nozzles attach inside the tube of the paste.

[0042] Paste Nozzle

[0043] Ref: https: / / www.thingiverse.eom / thing:4549298

[0044] The aforesaid link discloses a paste nozzle of various shapes. The nozzle attach to the mouth of the paste and dispense the paste in desired shape.

[0045] The threaded assembly based nozzle as disclosed in present is not anywhere disclosed, thus cited commercial differs from present invention.

[0046] OBJECT OF THE PRESENT INVENTION

[0047] The main object of the present invention is to disclose a paste dispensing nozzle with stepped cylindrical design for controlled paste dispensing.

[0048] One more object of the present invention is to disclose paste dispenser with an internal fitment design, ensuring seamless integration with the paste tube while providing a controlled and reduced amount of paste per application

[0049] Another object of the present invention is to disclose a paste dispensing nozzle, which possess a chamfered base.

[0050] SUMMARY OF THE INVENTION

[0051] The present invention discloses a paste dispensing nozzle designed to fit within the front opening of a paste tube. This unique nozzle comprises stepped cylindrical sections that regulate the paste flow, enabling precise control over the quantity dispensed. The number of stepped cylindrical sections may vary increasing or decreasing depending on the length of the tube's mouth to which the nozzle is attached. Unlike conventional nozzles, which often lead to over-dispensing, the nozzle of the present invention reduces the quantity of paste dispensed per use, minimizing waste and promoting more efficient product usage. Further, the internal fitment design of the nozzle eliminates the need for external attachments, thus overcoming issues related to detachment or misalignment commonly experienced with other nozzles. The stepped design ensures a smooth and consistent flow of paste, making it easier for users to dispense the right amount with minimal effort.

[0052] As per one example, the present invention discloses paste nozzle assembly (100) of 12mm length consisting collar (101) and nozzle portion extending from collar. The collar has 5mm inner diameter, 12mm outer diameter and 12mm thickness allowing secure and air tight nozzle attachment. Below the collar (101), there are series of stepped cylindrical portions (102, 103 & 104) over nozzle portions with outer diameter 10.9mm, width 1.0mm and radius 0.5mm. The first step (102) is positioned 3.5mm below the collar, second step (103) positioned 3.2mm below the first step, followed by third step positioned 3.5 mm below the second step (105) ensuring and providing a smooth transition between steps. Further, the base of the tube is chamfered, the chamfer has a length of 0.5mm, angled at 45°. The chamfer's outer diameter is 9.9mm and its purpose is to improve the alignment and sealing of the nozzle with the paste tube, facilitating smooth operation and preventing leakage during dispensing.

[0053] The nozzle disclosed in present invention is not restricted to the dimensions as mentioned in above example. The paste dispensing nozzle is configurable in variable dimensions, wherein smaller nozzles are employed for small-sized paste tubes and correspondingly larger nozzles are employed for large-sized paste tubes, based on the application requirements.

[0054] DESCRIPTION OF FIGURES-

[0055] Prior art figures

[0056] Figure 1 Isometric view of the disclosed paste nozzle

[0057] Figure 2 Top view of the disclosed paste nozzle

[0058] Figure 3 Side view of the disclosed paste nozzle showing stepped cylindrical design Numbering details-

[0059] (100): Nozzle assembly

[0060] (101): Collar portion of the nozzle

[0061] (102): Step 1

[0062] (103): Step 2

[0063] (104): Step 3

[0064] (105): Chamfered base

[0065] Figure 4 Front view of the disclosed paste nozzle

[0066] Figure 5 Paste tube with nozzle attachment

[0067] Figure 6 Paste mouth / top with nozzle attachment

[0068] DETAILED DESCRIPTION OF THE INVENTION

[0069] The present invention discloses a paste dispensing nozzle designed to fit within the front opening of a paste tube. This unique nozzle features stepped cylindrical portions that regulate the flow of paste, allowing for precise control over the amount dispensed. Unlike conventional nozzles, which often lead to over-dispensing, the nozzle of the present invention reduces the quantity of paste dispensed per use, minimizing waste and promoting more efficient product usage. Further, the internal fitment design of the nozzle eliminates the need for external attachments, thus overcoming issues related to detachment or misalignment commonly experienced with other nozzles. The stepped design ensures a smooth and consistent flow of paste, making it easier for users to dispense the right amount with minimal effort.

[0070] Preferred embodiment of the present invention-

[0071] The present invention will now be described in greater detail with reference to a preferred embodiment, which is provided for a better understanding of the invention. This embodiment is intended to illustrate the principles and functioning of the invention and should not be construed as limiting its scope.

[0072] The preferred embodiment of the paste dispensing nozzle consists a cylindrical nozzle body designed to fit securely within the front opening of a standard paste tube. The nozzle is composed of a series of stepped cylindrical portions facilitating controlled flow regulation, ensuring that the paste is dispensed in smaller, more precise amounts as compared to traditional nozzles.

[0073] The nozzle of present invention is manufactured from a durable and flexible material such as rubber or plastic that allows for easy insertion into the paste tube while maintaining a secure fit. The material also ensures that the nozzle remains free from wear and tear over prolonged use.

[0074] Constructional features of present invention

[0075] - (100): The entire nozzle assembly.

[0076] - (101): Represents the collar portion of the nozzle, presumably where the connection to the paste tube is made.

[0077] - (102), (103), (104): These represent the stepped cylindrical sections with radius (R0.5) and width (1.0 mm). These steps regulate the dispensing of paste.

[0078] - (105): The chamfered base, with a chamfer angle of 0.5 x 45°, ensuring a smooth alignment with the paste tube.

[0079] The nozzle is designed with extrusion holes in various shapes, such as star, flower, heart, or other geometric forms, enabling the paste to be dispensed in attractive patterns. This feature enhances the visual appeal of the toothpaste and makes brushing a more engaging and enjoyable activity for children. Further, the number of stepped cylindrical sections may vary increasing or decreasing depending on the length of the tube's mouth to which the nozzle is attached.

[0080] Exemplary embodiment of present invention

[0081] Referring to FIG. 1, 3 and 4, the paste nozzle assembly (100) consists a collar (101) and a nozzle portion extending from the collar. The length of the nozzle assembly (100) is 12 mm. The collar (101) has an inner diameter of 5 mm and an outer diameter of 12 mm, with a collar thickness of

[0082] 12 mm. This allows for a secure attachment to the paste tube, ensuring an airtight and firm seal.

[0083] Below the collar (100), a series of stepped cylindrical portions (102, 103 and 104) are incorporated / arranged over the nozzle portion (100). The steps (102, 103 and 104) has an outer diameter of 10.9 mm and is positioned 3.5 mm below the collar (100), i.e., the distance between the collar and the first step (102) is 3.5mm. A second step (103) is positioned 3.2 mm below the first step (102), followed by a third step (104) positioned 3.5 mm below the second step (105). Each step has a width of 1.0 mm and a radius of 0.5 mm, ensuring and providing a smooth transition between steps.

[0084] At the base of the nozzle portion (100), a chamfer (105) with a length of 0.5 mm, angled at 45° is provided. The chamfer's outer diameter is 9.9mm and its purpose is to improve the alignment and sealing of the nozzle with the paste tube, facilitating smooth operation and preventing leakage during dispensing.

[0085] These stepped portions are designed to dispense a consistent and desired amount of paste without exerting excessive force and to regulate the flow of paste, reducing the pressure required to dispense the product and preventing clogging by ensuring a smooth flow from the tube.

[0086] The nozzle disclosed in present invention is not restricted to the dimensions as mentioned in above example. The paste dispensing nozzle is configurable in variable dimensions, wherein smaller nozzles are employed for small-sized paste tubes and correspondingly larger nozzles are employed for large-sized paste tubes, based on the application requirements.

[0087] The technical modifications and improvements lies in disclosure paste dispensing nozzle designed to fit inside the front opening of paste tube, thus capable of internal fitment which features stepped cylindrical portions regulating flow of paste and thus allowing for precise control over the amount dispensed. The internal fitment design of the nozzle eliminates the need for external attachments, thus overcome issues related to detachment or misalignment commonly experienced with other nozzles. Novelty of the present invention is duly clear as per the non-disclosure of above features in the prior art patent and other non-patent literature.

[0088] The present invention introduces a novel and inventive paste dispensing nozzle assembly that addresses key challenges associated with conventional paste dispensing systems. The inventive step by way of technological advancement lies in unique combination of design elements, specifically incorporation of stepped cylindrical portions and an internal fitment mechanism that ensures both precise control over paste dispensing and secure attachment to the tube. The nozzle of the present invention includes a series of stepped cylindrical portions strategically positioned along the nozzle's length with specific dimensions, regulating the flow of paste as it is squeezed from the tube, thus allowing precise control over the amount dispensed. Further, the internal fitment design eliminates common issues with external nozzles, such as detachment, misalignment, or leakage, ensuring a stable and reliable user experience. Hence, present invention represents a significant advancement over existing paste dispensing technologies. These improvements provide a more efficient, user-friendly, and waste-reducing solution to paste dispensing, offering clear benefits to both consumers and manufacturers, thus offers economic advancement as well.

[0089] As used herein, the word "a" or "an" should be understood as not excluding plural elements or operations, unless such exclusion is explicitly recited. Furthermore, references to "one embodiment" of the present disclosure are not intended to be interpreted as excluding the existence of additional embodiments that also incorporate the recited features.

[0090] The present disclosure is not to be limited in scope by the specific embodiments described herein. Other embodiments and modifications apparent to those of ordinary skill in the art from the foregoing description and accompanying drawings are intended to fall within the scope of the present disclosure. Furthermore, although the present disclosure has been described herein in the context of above, those of ordinary skill in the art will recognize that its usefulness is not limited thereto and that the present disclosure may be beneficially implemented in any pump for similar purpose. The paste dispensing nozzle disclosed in the present invention has wide-ranging industrial applications in the personal care and hygiene product sector. The unique design and features of the nozzle make it highly suitable for integration into mass-production processes, improving product functionality and consumer satisfaction. This nozzle can be marketed as an eco-friendly, cost-efficient solution that aligns with consumers' growing preference for sustainable products and will also benefit the manufacturers.

Claims

im1. A paste dispensing nozzle assembly (100) for controlled paste dispensing wherein the same is designed to fit inside the front opening of paste tube and consists of: a collar portion (101) to provide secure and airtight attachment to the paste tube; a series of stepped cylindrical portions (102, 103 & 104) positioned below collar portion (101), to dispense a consistent amount of paste by reducing the pressure required for dispensing; chamfered base (105) at the base of nozzle portion (100) for smooth alignment and sealing with paste tube.

2. The paste dispensing nozzle assembly (100) as claimed in claim 1 wherein the first stepped cylindrical portion (102) is positioned below the collar (101), and each subsequent step is positioned below the preceding step.

3. The paste dispensing nozzle assembly (100) as claimed in claim 1 wherein the number of steps are determined according to the length of the nozzle assembly (100).

4. The paste dispensing nozzle assembly (100) as clamed in claim 1 wherein the nozzle assembly has total length of 12mm; collar portion has an inner diameter of 5mm, an outer diameter of 12mm and thickness of 12mm; each stepped cylindrical portion has an outer diameter of 10.9mm, a width of 1.0mm and a radius of 0.5mm; chamfered base of length 0.5mm, an outer diameter of 9.9mm and angled as 45°.

5. The paste dispensing nozzle assembly (100) as claimed in claim 1 wherein the in a nozzle length of 12 mm, the first stepped cylindrical portion (102) is positioned 3.5mm below collar (101), second stepped cylindrical portion (103) is positioned 3.2 mm below first step (102) and third stepped cylindrical portion (104) is positioned 3.5mm below the second stepped cylindrical portion (103).

6. The paste dispensing nozzle assembly (100) as claimed in claim 1 wherein the same is made from material selected from rubber or plastic.

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