US20050224388A1 - Self-heating pre-moistened wipe(s) package - Google Patents

Self-heating pre-moistened wipe(s) package Download PDF

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Publication number
US20050224388A1
US20050224388A1 US11/120,944 US12094405A US2005224388A1 US 20050224388 A1 US20050224388 A1 US 20050224388A1 US 12094405 A US12094405 A US 12094405A US 2005224388 A1 US2005224388 A1 US 2005224388A1
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Prior art keywords
agent
product
heating
package
region
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Abandoned
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US11/120,944
Inventor
Jerko Saric
Ivan Sestak
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Jerko Saric
Ivan Sestak
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Publication date
Priority to CA2,346,223 priority Critical
Priority to CA002346223A priority patent/CA2346223C/en
Priority to US09/961,178 priority patent/US20020174863A1/en
Application filed by Jerko Saric, Ivan Sestak filed Critical Jerko Saric
Priority to US11/120,944 priority patent/US20050224388A1/en
Publication of US20050224388A1 publication Critical patent/US20050224388A1/en
Application status is Abandoned legal-status Critical

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24VCOLLECTION, PRODUCTION OR USE OF HEAT NOT OTHERWISE PROVIDED FOR
    • F24V30/00Apparatus or devices using heat produced by exothermal chemical reactions other than combustion
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47KSANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K10/00Body-drying implements; Toilet paper; Holders therefor
    • A47K10/24Towel dispensers, e.g. for piled-up or folded textile towels; Toilet-paper dispensers; Dispensers for piled-up or folded textile towels provided or not with devices for taking-up soiled towels as far as not mechanically driven
    • A47K10/32Dispensers for paper towels or toilet-paper
    • A47K2010/3266Wet wipes
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47KSANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K10/00Body-drying implements; Toilet paper; Holders therefor
    • A47K10/24Towel dispensers, e.g. for piled-up or folded textile towels; Toilet-paper dispensers; Dispensers for piled-up or folded textile towels provided or not with devices for taking-up soiled towels as far as not mechanically driven
    • A47K10/32Dispensers for paper towels or toilet-paper
    • A47K2010/3266Wet wipes
    • A47K2010/3293Wet wipes combined with wipe warming devices

Abstract

A package for storing and heating a product includes a first sealable envelope having a region located inside the first sealable envelope, the region containing a first agent. The package further includes a sealed bag located inside the first sealable envelope and containing a second agent. The sealed bag is capable of being breached at a section allowing the second agent to react with the first agent generating heat within a heating region. The package further includes a second sealable envelope comprising a region for containing the product. A portion of the second sealable envelope is located within the heating region and the heat from the reaction heats the product located in the heating region. The first sealable envelope is compressible about the section of the sealed bag and contents of the first sealable envelope about the section of the sealed bag are flexible.

Description

    RELATED APPLICATION
  • This application is a continuation-in-part of U.S. application Ser. No. 09/961,178, which was filed on Sep. 24, 2001, and the entire contents of which is hereby incorporated by reference.
  • FIELD OF THE INVENTION
  • This invention relates to a self-heating package for containing and heating a product such as a pre-moistened wipe. The heated, pre-moistened wipe can be dispensed from the package and used to clean parts of the human body or any other surfaces as desired.
  • BACKGROUND OF THE INVENTION
  • Pre-moistened wipe(s) have been utilized to clean various surfaces. Examples include U.S. Pat. No. 4,666,621/CA Pat. No. 2,100,814 and CA Pat. No. 2,303,306. Previous pre-moistened wipe(s), for the purpose of cleaning the human body include U.S. Pat. No. 5,595,807. None of the afore mentioned include a heating agent for the purpose of providing a warm or hot cleaning material. One advantage of a heated pre-moistened wipe(s) is to avoid the sudden discomfort on initial contact with human skin. Another advantage is to enhance the cleaning experience of parts of the human body when a shower is unavailable. Yet another advantage of a heated pre-moistened wipe(s) is the fact that heat increases the efficacy of breaking down grease or oil compounds and loosening dirt.
  • Examples of heated packages include U.S. Pat. No. 4,559,921, U.S. Pat. No. 5,220,909, U.S. Pat. No. 4,823,769/CA Pat. No. 1,322,349, U.S. Pat. No. 4,819,612/CA Pat. No. 2,017,502, U.S. Pat. No. 4,809,673, and U.S. Pat. No. 5,465,707/CA Pat. No. 2,169,259. All of the aforementioned are self-heated exothermic packages designed to carry foodstuff within. In addition, all of the afore mentioned (with the exception of U.S. Pat. No. 5,465,707/CA Pat. No. 2,169,259) utilized rigid packaging for the purpose of storing and perpetuating the exothermic reaction.
  • Examples of flexible, chemical thermal bags are also known. Although they are comprised of flexible outer housing, they do not enclose any substance to be heated such as pre-moistened wipe(s). Examples include U.S. Pat. No. 4,856,651, U.S. Pat. No. 4,268,272, U.S. Pat. No. 3,874,504 and U.S. Pat. No. 4,995,217/U.S. Pat. No. 4,856,651/CA Pat. No. 1,278,478.
  • None of the afore mentioned references describes the novel enhancements to be mentioned hereinafter and defined as a self heating pre-moistened wipe(s) package. Moreover, they do not outline the advantages inherent within this design.
  • SUMMARY OF THE INVENTION
  • A self heating pre-moistened wipe(s) package unique in its design characteristics, constructed to enclose a pre-moistened wipe(s) immersed in a cleaning solution. Although applications are broad in scope, such a pre-moistened wipe is ideally suited for cleaning parts of the human body. A heated pre-moistened wipe can provide increased comfort when applied to human skin for cleaning parts of the human body. A heated pre-moistened wipe can improve the efficacy of the cleaning action both for the human body or any other relevant surface.
  • A package of wipes in accordance with the present invention can provide heated, pre-moistened wipes in a package that is relatively compact, less bulky, and relatively flexible which can improve storage during transport, in, for example, a purse or pocket. As well, the package of the present invention can be easily manufactured and therefore more practical. The self-heated pre-moistened wipes package of the present invention can provide a package with relatively little discarded packaging.
  • According to one aspect of the present invention, there is provided a package for storing and heating a product having a first sealable envelope having a first agent region located inside the first sealable envelope, the first agent region containing a first agent. The package includes a sealed bag located inside of the sealable envelope. The sealed bag is capable of being breached at a breach section allowing the second agent to react with the first agent generating heat within a heating region. The package also has a second sealable envelope for containing a product, a portion of the second sealable envelope being located within the heating region. The heat from the reaction heats the product located in the second sealable envelope. In the package, the first sealable envelope is compressible about the breach section of the sealed bag and contents of the first sealable envelope about the breach section of the sealed bag are flexible.
  • The second sealable envelope can include a product region for containing the product, and the product region can be located substantially within the heating region. The first and second sealable envelopes can be disposed on opposite sides of a barrier web. The sealed bag can include at least two independently breachable chambers, each chamber adapted to release an amount of the second agent when breached. The product can comprise a plurality of pre-moistened wipes, and the sealed bag can include a plurality of independently breachable chambers in correspondence to the plurality of pre-moistened wipes.
  • According to another aspect of the invention, a package for storing and heating a product includes a first sealable envelope having a first agent region located inside the first sealable envelope, the first agent region containing a first agent. The package further includes a sealed bag located inside the first sealable envelope, the sealed bag including at least one sealed chamber containing a second agent, each chamber of the at least one sealed chamber capable of being independently breached at a breach section allowing an amount of the second agent to react with the first agent generating heat within a heating region. The package has a second sealable envelope comprising a region for containing the product, a portion of the second sealable envelope being located within the heating region, the heat from the reaction heating the product located in the heating region. The first sealable envelope is compressible about each respective breach section of each of the at least one sealed chamber.
  • According to another aspect of the present invention, a package for storing and heating a pre-moistened wipe product includes a first sealable envelope having a first agent region and a second region located inside the first sealable envelope, the first region containing a first agent, the package having a sealed bag located in the second region of the first sealable envelope, the sealed bag containing a second agent, the sealed bag capable of being breached at a breach section allowing the second agent to flow from the sealed bag to react with the first agent generating heat within a heating region. The package has a second sealable envelope having a region for containing the product, a portion of the second sealable envelope being located within the heating region, the heat from the reaction heating the pre-moistened wipe product located in the heating region. The first sealable envelope is compressible about the breach section of the sealed bag, contents of the first sealable envelope about the breach section of the sealed bag being flexible, and the sealed bag being located about the second region and the first agent being located about the first region enabling gravity to assist flow of the second agent towards said first agent when the sealed bag is breached.
  • Other objectives of the present invention may become more apparent as said invention is described in greater detail in the following descriptions and drawings.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a partial, cross-sectional view of a self-heating pre-moistened wipe(s) package according to one preferred embodiment of the invention.
  • FIG. 1A is a side view of the package of FIG. 1.
  • FIG. 1B is a perspective view of a self heating pre-moistened wipe(s) package showing a similar embodiment to FIG. 1 but with a slightly different trigger mechanism.
  • FIG. 1C is a perspective view of a self heating pre-moistened wipe(s) package showing a similar embodiment to FIG. 1 and FIG. 1B, but with a slightly different trigger mechanism.
  • FIG. 1D is a perspective and a cross-sectional view of a self-heating pre-moistened wipe(s) package of a similar embodiment to FIG. 1 and FIG. 1A but with a specific orientation of said exothermic reagents.
  • FIG. 1E is a section view of the package of FIG. 1D taken along the lines 1E-1E.
  • FIG. 2 is a perspective view of a self heating pre-moistened wipe(s) package of a similar embodiment to FIG. 1 but with a variation in the trigger mechanism used to begin the exothermic reaction.
  • FIG. 2A is a perspective view of a self heating pre-moistened wipe(s) package showing a similar embodiment to FIG. 2 but with a slightly different trigger mechanism.
  • DETAILED DESCRIPTION OF THE INVENTION
  • In the description and diagrams that follow, specific terminology will be used in describing the details of the present invention for the sake of clarity. It is understood that these terms and/or phrases are not intended to be limiting in any way, shape or form, in their application to the details of construction and to the arrangements of the components set forth in the following description and illustrations. It is understood that in this patent the words “bladder” and “chamber” or their plural forms are understood to denote the same meaning. It is also understood that the terminology used includes all technical equivalents, which are used in a similar manner to accomplish a similar purpose. As such, it is noted and understood by all those skilled in the art that the basic idea of the present invention described in detail in this disclosure may easily be utilized as a basis for the designing of other structures and systems for carrying out similar purposes. It is also understood therefore that this patent includes all such variations, insofar as they do not depart from the basic idea and scope of the present invention which is a self-heating pre-moistened wipe(s) package.
  • The present invention relates a novel new idea in the form of a pre-moistened wipe(s) that is not only heated, but self-heated in an insulated exothermic package that is flexible and disposable.
  • FIG. 1 and FIG. 1A show a package (5) for storing and heating a product in accordance with a preferred embodiment of the present invention. In FIG. 1 the illustration is shown as a partial cross-section of the components of the basic invention. The package (5) includes a first sealable envelope or outer pouch (10) that holds a second sealable envelope or inner pouch (13). The inner pouch (13) is adapted to hold the product to be stored and heated. In the embodiment illustrated, the product to be stored and heated is in the form of at least one pre-moistened wipe (6). The package (5) provides an intermediate space (7) between the interior of the outer pouch (10) and exterior of the inner pouch (13), at least a portion of the intermediate space (7) defining a first agent region (8) for containing a first agent (22). The package (5) is also provided with a sealed bag that can be in the form of a solvent chamber (20), at least a portion of which defines a second agent region (9) for containing a second agent (19). Together the first and second agents (22) and (19) form at least a portion of heating elements (25) of the package (5), described in greater detail subsequently herein.
  • Ideally, the outer pouch (10) can be formed of a sheet material that is flexible, liquid impermeable and somewhat heat resistant. It can be opaque and can be made of a laminated material such as blax nylon, polyester such as MYLAR®, polyethylene, polypropylene, aluminum, aluminized polymer film and other conventional plastic or other packaging materials such as rubber, vinyl, vinyl-coated fabric, polyethylene and laminated aluminum foil suitable for containing heated reagents. The outer pouch (10) can include a thermal insulated layer (12) which may be of a fine cell or cross-linked polyethylene or other suitable material. The thermal insulated layer (12) can define an inner surface of the outer pouch (10). The composite material sheet can be folded together with the folded edge becoming the bottom of the outer pouch (10). The sides are held together preferably with weld seams (11) to form the complete outer pouch (10).
  • The inner pouch (13) for containing the at least one pre-moistened wipe (6) is disposed substantially within the outer pouch (10). The inner pouch (13) can be formed from a heat resistant, durable, liquid impermeable sheet material folded together. The folded edge 10A can become the bottom of the inner pouch (13). In the embodiment illustrated, liquid-tight weld seams (14) are made along the length of the sides to form the pouch (13), which is adapted to hold the pre-moistened wipes (6). The wipes (6) may be of any size, shape, construction, and composition depending on the manufacturer's design requirements and desires. The pre-moistened wipes (6) can be impregnated with any safe, effective, cleaning solution specifically suited to its application (e.g. cleaning portions of the human body). Furthermore, the pre-moistened wipes (6) can be folded over several times, few times or not at all, in accordance with the manufacturer's design requirements and objectives, and in order to, for example, maintain rigidity, flatness, or compactness of the package (5) for design requirements.
  • The inner pouch (13) is adapted to be opened for dispensing one or more of the wipes (6) from the package (5). In the embodiment illustrated, the inner pouch (13) has a top edge (30) that is located outside of the perimeter of the outer pouch (10), i.e., above the upper edge of the outer pouch (10). The inner pouch (13) can be opened by pulling on a tear strip (32) provided in the inner pouch (13) adjacent the top edge (30). Other methods for opening the inner pouch (13) can also be employed, such as, for example, but not limited to, a plastic zipper or an adhesive strip provided in the inner pouch (13), near the upper edge of the outer pouch (10). Further, in the illustrated embodiment, the inside surface of the outer pouch (10) is sealed against the outside surface of the inner pouch (13) by weld seams (31). Adhesive strips may also be used in place of weld seams (31). The weld seams (31) can facilitate sealing closed the outer pouch (10) and preventing cross contamination of the pre-moistened wipes (6) with the first and second agents (22) and (19) when the inner pouch (13) is opened. In addition, weld seams (31) (or adhesive strips) can prevent heat loss during an exothermic reaction (described subsequently herein).
  • In the embodiment illustrated, an intermediate space (7) is provided between the inside surface of the thermal insulating layer (12) of the outer pouch (10) and the outside surface of the inner pouch (13). A least a portion of the heating elements (25) can be provided within the intermediate space (7). The heating elements include the first agent (22) and the second agent (19). The second agent (19) is, in the illustrated embodiment, provided in a sealed bag or solvent chamber (20). The solvent chamber (20) can be in the form of a bag or bladder made of some liquid impermeable, rupturable plastic-like material. At least a portion of the solvent chamber (20) can define a second agent region (9) for containing the second agent (19). The second agent (19) can be in the form of a solvent adapted to react with the first agent (22) in an exothermic reaction. In the embodiment illustrated, the solvent chamber (20) is sized to fit snugly in the intermediate space (7) and is sealed against the inside of said thermal insulated layer (12) by liquid tight weld seams (23). The solvent chamber (20) can be constructed in such a manner that when specific pressure is applied to the package (8) (in between fingers or against hard surface) the chamber (20) ruptures, allowing the second agent (19) to come into contact with the first agent (22), thus triggering the exothermic reaction. The chamber (20) can be adapted so that pressure against or along the bag/chamber (20) ruptures, perforates, or otherwise breaches the bag/chamber (20) in a breach section (17), while leaving the remaining surfaces of the chamber (20), and the surfaces of the outer pouch (10) and inner pouch (13) surrounding the product and the intermediate space intact. The breach section (17) can be along a seam, weld line, line of weakness, or any breachable surface of the chamber (20). The solvent chamber (20) can be comprised of any of a number of functional configurations. In a preferred embodiment, the chamber (20) comprises a flexible, rupturable, polymer like material containing the second agent (19), and is adapted to be manually ruptured.
  • The first agent (22) of the heating elements (25) can generally be in the form of an exothermic reagent. The first agent (22) can be magnesium oxide or some other suitable chemical and can be in the form of a powder, pad, gel or even liquid. In the embodiment illustrated, the first agent (22) is in the form of a powder that is enclosed in another bag called a first agent bag (21) (also referred to as an absorbent envelope (21) sometimes herein). At least a portion of the first agent bag (21) can define at least a portion of the first agent region (8). The first agent bag (21) can, but need not, fit snugly in the intermediate space (7). The first agent bag (21) can be attached to the outside of the inner package (13) by, for example, weld seams (24). The first agent bag (21) can be constructed of a porous, absorbent material that can facilitate an exothermic reaction between the first and second agents by absorbing and/or transporting the second agent (19) in solvent form by capillary action, and bringing the second agent (19) in contact with the first agent (22) within the first agent bag (21). The absorbent envelope (21) can be made from filter paper or similar material. The second agent (19) can be in the form of a pad, and the absorbent envelope (21) can be a sheet of absorbent material wrapped around such exothermic pad. The reagent (22) can be a powder, and the powder can be sealed within the absorbent envelope (21). The reagent (22) can be a liquid or gel, and the exothermic reagent (22) need not be contained in a first agent bag (21) but can be permitted to permeate throughout the intermediate space (7), between the thermal insulated layer (12) and the inner package (13).
  • The package (5) can be presented to a user with the wipes (6), first agent (22), and second agent (19) in their respective compartments of the package (5). The package (5) is generally flexible, compressible, and can conform in shape to a variety of storage or transport space limitations. The package (5) is flexible about the section where the solvent bag (20) is adapted to rupture, and can be, for example, rolled up along its width or length to facilitate storage or transport. To use the package (5), a user can apply specific pressure to the outer pouch (10) so that the solvent bag (20) is ruptured along the breach section, thus triggering the heating of the wipes (6) by allowing the first and second agents to interact with each other and generate heat in a heating region by means of an exothermic reaction. At least a potion of the inner pouch (13) holding the wipes (6) is disposed in the heating region, so that the wipes (6) become warmed by exposure to the heat of the exothermic reaction. After waiting a brief period to allow the wipes (6) to warm up to a desired amount, the inner pouch (13) can be opened and one or more pre-heated wipes (6) can be dispensed from the package (5).
  • As previously stated, FIG. 1 and FIG. 1A depict one preferred embodiment of the invention. FIG. 1B and FIG. 1C depict another embodiment of a package 105 in accordance with the present invention. The package 105 is similar to the package 5, but has multiple bladders/chambers (20A), rather than a single solvent chamber (20). The bladders (20A) can be connected or can be independent of each other. For example, each chamber (20A) embodying the same characteristics as the chambers (20) of the package 5 can be independent plastic-like bladders each containing an amount of the second agent (19), and each positioned and attached by weld seams to the inside of the thermal insulated layer (12) of the outer pouch (10). Alternatively, the individual solvent chambers (20A) can be connected to one another by a flat, rigid, plastic substance (20B) that sits in the intermediate space (7). This rigid plastic substance (20B) may be held in place by weld seams (24) or simply fit snugly into place. Each chamber (20A) can be adapted to be ruptured independently by the application of specific pressure to each bladder. The advantage of this design is that a plurality of discrete exothermic reactions can be provided, each of which can be associated with unique times that one of the wipes (6) is dispensed from the package (5). For example, in the embodiment illustrated, the package (5) can hold twenty-one wipes (6), and twenty-one chambers (20A) are provided so that one chamber (20A) can be ruptured each time one wipe (6) is dispensed. The intensity of each reaction can be controlled by the user depending on when and how many chambers are ruptured. Also, the temperature of the pre-moistened wipe(s) may be controlled.
  • FIG. 1C illustrates a further embodiment of the package (105). In FIG. 1C, the package (105) has multiple solvent chambers (20C) that are similar to the chambers 20B but are round in shape rather than square. The number and shape of bladders/chambers (20A), (20B), (20C) are variable depending on the manufacturer's needs.
  • Another embodiment of a package (205) in accordance with the present invention can be seen in FIGS. 1D and 1E. The package (205) is similar to the packages (5) and (105), and has a slight variation in the design of the trigger mechanism. The solvent bag (20) of the package (205) is attached adjacent one end of the outer pouch (10) by the weld seam (11) or a separate weld seam and the first agent (22) is disposed in the intermediate space (7) near the opposite end. In the embodiment illustrated, the solvent bag (20) and the first agent (22) are generally adjacent upper and lower ends, respectively, of the package (205). The first agent (22) may not be affixed and can take the form of a liquid, gel, powder, absorbing envelope or pad. The first agent bag (21) can be affixed by one or more weld seams (23) to the outside of the inner pouch (13) or to the inside of the outer pouch (10). The second agent bag (20) can have a bottom weld seam (23A) that can define the breach section (17) of the solvent bag (20). A generally non-rupturable barrier web (243) can extend between upper and lower ends of the package (205), defining the inner pouch (13) on one side thereof, and having the first and second agent regions (8) and (9), respectively, disposed on the other side, opposite the inner pouch (13). In other words, the first sealable envelope (21) and second sealable envelope (13) can be disposed on opposite sides of the barrier web (243). The barrier web (243) can be formed of a sidewall portion of the first sealable envelope (21) or of the second sealable envelope (13) or both. The solvent bag (20) can be pressed or squeezed to cause it to rupture (preferably along the bottom weld seam), and the package (5) can be held upright temporarily to allow the second agent (19) to seep down into the first agent region (8) below, thereby triggering the exothermic reaction. This specific arrangement of the solvent bag (20) positioned above the first agent region (8) utilizes gravity to enhance contact between the two agents (22) and (19), which can increase the efficacy of the exothermic chemical reaction and can also reduce manufacturing costs. Alternatively, the solvent bag (20) can be positioned centrally or at a lower end of the package (205), having the first agent region (8) disposed above and below or above the solvent bag (20).
  • FIG. 2 and FIG. 2A are perspective drawings of a further alternative preferred embodiments of a package (305) and (405), respectively, in accordance with the present invention. The packages (305) and (405) are similar to the packages (5), (105), and (205), and include a slight variation in the heating elements (25). As seen in FIG. 2, the package (305) includes a trigger mechanism utilizing a pulling device. The solvent bag (20) of the package (305) is formed from a liquid impermeable plastic sheet material folded together. The folded edge forms the bottom of the solvent chambers (20). Liquid-tight weld seams (23) are made around the sides and top to form the solvent bag (20). The second agent (or solvent) (19) is contained within the volume enclosed by the weld seams (23). The solvent bag (20) can fit snugly in the intermediate space (7) formed between the inside of the thermal insulated layer (12) and outside of the inner pouch (13). The solvent bag (20) can be attached to the inside of the thermal insulated layer (12) by attachment weld seams (24) or by some other means. The solvent chamber (20) of the package (305) contains manufactured pore-like holes or apertures (27) facing the first agent bag (21) containing the chemical reagent (22). An adhesive flap (26) covers the apertures (27), in order to contain the solvent (19) within said solvent bag (20). A pull string (41) enters the outer package (10) through a small hole (43). The pull string hole (43) is sufficiently small as to minimize heat loss during use of the package (305). The pull string (41) extends down the length of the bladder/chamber (20) and loops around the loop hole (40) of the adhesive flap (26). The other end of the pull string (41) exits the small hole (43) and is attached to a fastener (44). Upon pulling said pull string (41), the adhesive flap (26) is peeled off of the solvent chamber (20) exposing the porous openings (27) thereby releasing the solvent (19) and triggering the exothermic reaction. In order to increase the mechanical efficiency of the triggering mechanism, an extended lower lip (61) can be incorporated into the design of the outer pouch (10). The lower lip (61) is, in the embodiment illustrated, formed by extending the lower folded portion of the outer pouch (10) beyond the weld seams (60). The lower lip (61) provides a surface that can be held between fingers, to pull against the pulling action of the string (41) when the exothermic reaction is triggered. To improve the mechanical action of the triggering mechanism, increasing the rigidity of the device through packaging or some other means can be beneficial. Providing the first agent (22) in the form of a pad is recommended for increased rigidity.
  • Referring now to FIG. 2A, the package 405 has a solvent bag (20) formed from a liquid impermeable plastic sheet material folded together. The folded edge forms the bottom of the solvent bag (20). Liquid tight weld seams (23) are formed around the sides and top to form the solvent chamber (20). Two liquid tight weld seams (62) are made across the top and bottom of the bag at a distance away from the edges to form an upper and lower lip (63). Said solvent is contained within this space. The two lips (63) that are formed are affixed to the inside of the thermal insulated layer (12) by fasteners (64) such as staples or some other means. A pull string (41) enters through the outer package (10) via a small hole/opening (43), small enough to minimize heat loss when triggered. The string (41) extends down the solvent chamber (20) in the space between the solvent bag (20) and the inner pre-moistened wipe(s) package (13). Said pull string (41) further extends around one end of the solvent bag through a rip hole or loop hole (40) cut into the lower lip (63). Said pull string (41) then traverses back up along the backside of the solvent bag (20) between the solvent bag (20) and the inside of the thermal insulated layer (12). It is then fastened to the combination sheet layer comprising the outer package (10) and the thermal insulated layer (12) by some fastener (42) such as a staple or some other means. The other end of the pull string (41) protruding from the small hole (43) outside the outer package (10), is attached to a pull-tab (44). When the pull string (41) is activated, it facilitates a tear starting at the loophole (40) continuing down the center of the solvent bag (20) releasing said solvent, triggering the exothermic reaction. To maximize the efficacy of said triggering mechanism, rigidity of the device is of utmost importance. Rigidity of packaging should be taken into consideration by the manufacturer. In addition, an exothermic reagent (22) in the form of a pad is preferred to increase rigidity. In addition, when designing the outer package (10), a lower lip (61) extends beyond the weld seams (60) some distance to provide a grip to be held between fingers to counteract the pulling action of the pull string (41) and maximize the tearing action of said trigger mechanism.
  • While preferred embodiments of the invention have been described herein in detail, it is to be understood that this description is by way of example only, and is not intended to be limiting. The full scope of the invention is to determine from reference to the appended claims.

Claims (19)

1. A package for storing and heating a product, said package comprising:
(a) a first sealable envelope comprising a first agent region located inside said first sealable envelope, said first agent region containing a first agent;
(b) a sealed bag located inside said first sealable envelope and containing a second agent, said sealed bag capable of being breached at a breach section allowing said second agent to react with said first agent generating heat within a heating region; and
(c) a second sealable envelope for containing said product, a portion of said second sealable envelope being located within said heating region, said heat from said reaction heating said product located in said second sealable envelope;
wherein said first sealable envelope is compressible about said breach section of said sealed bag and contents of said first sealable envelope about said breach section of said sealed bag are flexible.
2. The package for storing and heating a product as claimed in claim 1, wherein said second sealable envelope comprises a product region for containing said product, said product region being located substantially within said heating region.
3. The package for storing and heating a product as claimed in claim 2, wherein said product comprises a pre-moistened wipe.
4. The package for storing and heating a product as claimed in claim 2, wherein said second agent comprises a solvent.
5. The package for storing and heating a product as claimed in claim 2, further comprising a first agent bag located inside said first sealable envelope, said first agent bag containing said first agent.
6. The package for storing and heating a product as claimed in claim 5, wherein said first agent bag is permeable and said first agent comprises a powder.
7. The package for storing and heating a product as claimed in claim 6, wherein said first agent bag contains said solvent bag and said first agent comprises a gel.
8. The package for storing and heating a product as claimed in claim 4, wherein said sealed bag has a size and shape allowing said sealed bag to fit snugly inside said first sealable envelope.
9. The package for storing and heating a product as claimed in claim 8, wherein said first sealable envelope and said second sealable envelope are disposed on opposite sides of a barrier web.
10. The package for storing and heating a product as claimed in claim 9, wherein said sealed bag comprises at least one sealed chamber containing said second agent, said at least one sealed chamber capable of being independently breached.
11. The package for storing and heating a product as claimed in claim 10, wherein said product to be stored by said package comprises a plurality of pre-moistened wipes, and wherein said at least one sealed chamber comprises a plurality of chambers in correspondence to said plurality of pre-moistened wipes.
12. A package for storing and heating a product, said package comprising:
(a) a first sealable envelope comprising a region located inside said first sealable envelope, said region containing a first agent;
(b) a sealed bag located inside said first sealable envelope, said sealed bag including at least one sealed chamber containing a second agent, each chamber of said at least one sealed chamber capable of being independently breached at a section allowing said second agent to react with said first agent generating heat within a heating region; and
(c) a second sealable envelope comprising a region for containing said product, a portion of said second sealable envelope being located within said heating region, said heat from said reaction heating said product located in said heating region,
wherein said first sealable envelope is compressible about each said section of said each chamber of said at least one sealed chamber.
13. The package for storing and heating a product as claimed in claim 12, wherein said product is a pre-moistened wipe.
14. The package for storing and heating a product as claimed in claim 13, further comprising a first agent bag located inside said first sealable envelope, said first agent bag containing said first agent.
15. The package for storing and heating a product as claimed in claim 14, wherein said sealed bag has a size and shape allowing said sealed bag to fit snugly inside said first sealable envelope.
16. The package for storing and heating a product as claimed in claim 15, wherein said first agent bag has a size and shape allowing said first agent bag to fit snugly inside said first sealable envelope.
17. A package for storing and heating a product, said package comprising:
(a) a first sealable envelope comprising a first region and a second region located inside said first sealable envelope, said first region containing a first agent;
(b) a sealed bag located inside said first sealable envelope in said second region of said first sealable envelope, said sealed bag containing a second agent, said sealed bag capable of being breached at a section allowing said second agent to flow from said sealed bag to react with said first agent generating heat within a heating region; and
(c) a second sealable envelope comprising a region for containing said product, a portion of said second sealable envelope being located within said heating region, said heat from said reaction heating said product located in said heating region,
wherein said first sealable envelope is compressible about said section of said sealed bag, contents of said first sealable envelope about said section of said sealed bag are flexible, and
said sealed bag is located about said second region and said first agent is located about said first region enabling gravity to assist flow of said second agent towards said first agent when said sheet material is breached.
18. The package for storing and heating a product as claimed in claim 17, wherein said region of said second sealable envelope for containing said product is located substantially within said heating region.
19. The package for storing and heating a product as claimed in claim 18, wherein said product is a pre-moistened wipe.
US11/120,944 2001-05-25 2005-05-04 Self-heating pre-moistened wipe(s) package Abandoned US20050224388A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA2,346,223 2001-05-25
CA002346223A CA2346223C (en) 2001-05-25 2001-05-25 Self heating pre-moistened wipe(s) package
US09/961,178 US20020174863A1 (en) 2001-05-25 2001-09-24 Unknown
US11/120,944 US20050224388A1 (en) 2001-05-25 2005-05-04 Self-heating pre-moistened wipe(s) package

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Related Parent Applications (1)

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US11/120,944 Abandoned US20050224388A1 (en) 2001-05-25 2005-05-04 Self-heating pre-moistened wipe(s) package

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US20020174863A1 (en) 2002-11-28
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