Patent Application
20230406593
The present disclosure relates to fluid containers, and more particularly, to a mono-dose liquid container having an anti-crushing feature.
When dispensing fluids from a container, such as a toxic liquid bait used for insect or pest control, it is desirable to easily control the amount of fluid dispensed from the container and/or ensure that the container may be fully emptied in an easy manner by a user. Further, it is desirable to provide a container meeting these needs, while remaining as cost-effective as possible. For example, in the case of mono-dose containers or packages, fluid contained therein is typically expelled by manually compressing or squeezing the container. Excessive compression of the container, however, can result in its plastic deformation, which may limit further control of, and/or prevent, further expulsion of the fluid. This may be particularly problematic when the container does not include, for example, a vent allowing the container to dispense fluid under only the force of gravity.
Accordingly, improved containers are desired which prevent or limit crushing or plastic deformation during dispensing operations, while remaining cost effective and easy to use.
According to an embodiment of the present disclosure, a mono-dose container comprises a housing defining an internal cavity. The housing includes a first sidewall defining a first interior surface of the internal cavity, and a second sidewall defining a second interior surface of the internal cavity at least partially opposing the first interior surface. A first protrusion extends from the first sidewall into the internal cavity. A second protrusion extends from the second sidewall into the internal cavity and in a direction of the first protrusion. The first and second protrusions define complementary surfaces sized to engage one another and limiting relative movement between the first and second protrusions in at least two directions.
The invention will now be described by way of example with reference to the accompanying Figures, of which:
Exemplary embodiments of the present disclosure will be described hereinafter in detail with reference to the attached drawings, wherein the like reference numerals refer to the like elements. The present disclosure may, however, be embodied in many different forms and should not be construed as being limited to the embodiment set forth herein; rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the concept of the disclosure to those skilled in the art.
In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are schematically shown in order to simplify the drawing.
Embodiments of the present disclosure include a container adapted to hold and dispense a liquid. More particularly, embodiments include a container having a fluid or liquid-containing cavity with at least one internal protrusion adapted to enable dispensing a liquid contained therein via compression, while preventing the cavity thereof from being crushed. Embodiments of the present disclosure further include a method for dispensing a liquid from the above-described container, including a process of compressing the container until engagement of the internal protrusion(s) and subsequently releasing the container in a repeating pumping action.
Referring generally to
The housing 101 is defined by top and bottom walls 110,120 and associated integral sidewalls forming the internal cavity 102. The top and bottom walls 110,120 are adapted to be pressed together to reduce the volume of the internal cavity 102 for dispensing a liquid contained therein. More specifically, the housing 101 generally defines a first housing half 108 defining the top wall 110, and a second housing half 118 defining the bottom wall 120. The first and second housing halves 108,118 each define an at least partially vertical sidewall 109,119 extending circumferentially about the housing 101. The first and second housing halves 108,118 are joined at a shared joining wall or flange 114 defined about a lateral perimeter of the housing 101. The tab 106 is at least partially defined in the flange 114. A pair of notches 190 may be formed in the flange 114 in the area of the tab 106, promoting the tearing, breaking or cutting of the tab in the correct location prior to use.
The container 100 includes at least one anti-crushing feature adapted to prevent or limit the plastic deformation of the housing 101 by a user while dispensing the contained liquid. Specifically, as the container 100 does not include a vent or a breathing port, the primary means to efficiently dispense liquid from the internal cavity 102 includes compressing at least one of the top or bottom walls 110,120 of the housing 101, and preferably both walls toward one another. This at least partially collapses the internal cavity 102, reducing its volume and expelling the liquid via the open passage 104 via increased internal pressure. In order to ensure that a user can completely expel the liquid in the internal cavity 102, the container must enable a user to repeatedly compress the internal cavity in a pumping-like action. More specifically, the housing 101 is adapted to be only elastically deformed, or at least partially only elastically deformed, under a compressive expulsion force applied by a user. Upon release of the force, the housing 101, and more specifically its opposed top and bottom walls 110,120 thereof, is adapted to at least partially elastically return to its undeformed state (or the volume of the internal cavity 102 return to, or nearer to, its original uncompressed volume), drawing air back into the cavity.
In order to prevent excess plastic deformation (or any plastic deformation) of the housing 101, the container 100 includes at least one anti-crushing or anti-crush feature or structure 150. Specifically, in the exemplary embodiment, each of the opposing top and bottom walls 110,120 includes a respective protrusion 112,122 extending from the respective wall and into the internal cavity 102. As shown, the protrusions 112,122 extend in a direction generally toward one another in an uncompressed state of the housing 101. A predetermined gap or space 140 is defined between the protrusions 112,122 in the uncompressed state of the housing 101.
Deformation of the housing 101 causes relative motion between the top and bottom walls 110,120, reducing the size of the gap 140 in a direction(s) of compression C. After sufficient compression, ends of the protrusions 112,122 will engage with one another, limiting the deformation or compression of the housing 101 in the indicated direction. In this way, the size of the gap or space 140 between the protrusions 112,122 is selected to control the amount of fluid dispensed from the container 100, as well as mechanically limit the amount of deformation of the housing 101, for each compression cycle thereof (i.e., each pump or squeeze). The protrusions 112,122 enable a cyclic pumping operation of the container 100 in order ensure all of the fluid contained therein may be expelled.
The protrusions 112,122 comprise complementary mating surfaces 152,154 defined on opposing ends thereof. The mating surfaces 152,154 are adapted to engage one another in the compressed state of the housing 101, as shown in
In the embodiment shown in
In a preferred embodiment, the anti-crushing feature 150 is defined in a front of the housing 101, or toward a front of the housing, proximate the outlet passage 104 in a longitudinal direction of the housing. Further, the housing 101 of the container 100 comprises a generally tapered profile, with a cross-section of the internal cavity 102 being greater toward the front of the housing 101 as compared to a rear of the housing 101 opposite the passage 104. The anti-crushing feature(s) 150 are preferably located centrally within the cavity 102 in a lateral direction of the housing 101, transverse to the longitudinal direction.
As set forth above, the housing 101 may be formed by a blow-molding process of manufacture. Specifically, each mirror-image housing halves 108,118 may by formed from a single sheet of polymer film to create the each half. The halves 108,118 are brought into abutment with one another and sealed to one another along a desired sealing line that corresponds with the interior circumferential edges the flange 114 of the housing 101. In one embodiment, an opening is left in the sealing line to provide a fluid input channel. The central area surrounded by the sealed outer edges that will form the internal cavity 102 is also unsealed. In one embodiment, a folded piece of film material sealed is then placed into a two-sided mold that is pre-formed to create the desired bait pack or housing shape including the inner contour of the internal cavity 102, as shown in
Referring to
Using a container according to the above-described embodiments of the present disclosure, a method of expelling fluid therefrom includes the step of elastically deforming the container to reduce an internal volume thereof. This step includes applying a pressing force to a first wall of the container in a direction toward a second wall of the container for reducing the relative distance between the first and second walls. This compression engages a feature formed on an interior of the first wall with or into a feature formed on an interior surface of the second wall, limiting relative movement of the first sidewall and the second sidewall in a plurality of directions. The method further includes the steps of releasing the pressing force applied to the first sidewall and permitting the container to elastically return to an at least partial undeformed state, and repeating the steps of elastically deforming the container and releasing the pressing force until a predetermined amount of fluid is expelled from the container.
It should be appreciated for those skilled in this art that the above embodiments are intended to be illustrated, and not restrictive. For example, many modifications may be made to the above embodiments by those skilled in this art, and various features described in different embodiments may be freely combined with each other without conflicting in configuration or principle.
Although several exemplary embodiments have been shown and described, it would be appreciated by those skilled in the art that various changes or modifications may be made in these embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined in the claims and their equivalents.
As used herein, an element recited in the singular and proceeded with the word “a” or “an” should be understood as not excluding plural of said elements or steps, unless such exclusion is explicitly stated. 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. Moreover, unless explicitly stated to the contrary, embodiments “comprising” or “having” an element or a plurality of elements having a particular property may include additional such elements not having that property.
