EP0391941B1 - Method and apparatus for closing containers - Google Patents
Method and apparatus for closing containers Download PDFInfo
- Publication number
- EP0391941B1 EP0391941B1 EP88910196A EP88910196A EP0391941B1 EP 0391941 B1 EP0391941 B1 EP 0391941B1 EP 88910196 A EP88910196 A EP 88910196A EP 88910196 A EP88910196 A EP 88910196A EP 0391941 B1 EP0391941 B1 EP 0391941B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- lid
- closure panel
- approximately
- opening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
- B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
- B65D41/22—Caps or cap-like covers with elastic parts adapted to be stretched over the container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D51/00—Closures not otherwise provided for
Definitions
- the invention relates to closures for non-rigid containers each having a readily deformable opening wall and more specifically it relates to closures for quickly and easily closing containers of various sizes with a single sized closure device.
- lids or other closures Numerous attempts have been made to provide simple and effective lids or other closures for containers. However, perhaps the greatest problems with lids are encountered with lids for disposable containers such as cups at convenience stores or fast food restaurants. Since there are a wide variety of sizes of such containers, the convenience store or fast food restaurant must presently stock a wide variety of sizes of lids to correspond with the variously sized openings of the containers. In practice, the selection of the proper lid and the placement of the lid on the container is often time consuming and, when rushed, can lead to improper installation of the lid, and leakage, and even damage to the container.
- the present invention provides an elastic container lid, stretchably adjustable to cover an opening of any of a plurality of disposable non-rigid containers each having a readily deformable opening wall defining a mouth configuration for an opening of the container, each container opening having a diameter ranging from a minimum of approximately 7.62cm (three inches) to approximately 15.24cm (six inches), comprising:- a closure panel having a predetermined surface area of approximately 6.35cm (approximately two and one-half inches) in diameter in an unstretched condition, the closure panel having a predetermined thickness ranging from approximately 0.00508cm to approximately 0.0203cm (approximately two thousandths of an inch to approximately eight thousandths of an inch), to enable the closure panel to have sufficient elasticity to be stretchable over said maximum container diameter of approximately 15.24cm (approximately six inches) to cover any of said container openings; a gripping zone extending transversely from the periphery of the closure panel, the gripping zone having a
- containers may be rapidly and simply closed, especially disposable containers such as beverage containers having varying sized openings.
- the lid of the invention provides a way of providing for the supply of beverages in disposable containers.
- Such supply includes providing disposable containers in which some containers have an opening of one size defined by an opening wall and in which some containers have an opening of a different size defined by an opening wall.
- lids of a single size are provided for the containers, each lid being of an elastic material which retains its elasticity during use.
- Each lid comprises a closure panel and a gripping zone along the periphery of the closure panel and is stretchable for engaging the gripping zone with the opening wall of either size opening to seal the opening.
- the lid of the invention provides a way of dispensing beverages in containers having a plurality of differently sized openings.
- Such dispensing includes dispensing a beverage into such a container.
- Lids of a single size are used for all of the differently sized containers, each lid being of an elastic material which retains its elasticity during use.
- Each lid has a closure panel with a gripping zone along its periphery.
- Dispensing includes the step of resiliently stretching such a lid over the container opening, engaging the gripping zone about the opening, and releasing the lid for the resiliency of the lid to engage the lid in position over the container opening.
- the present invention provides an elastic container lid which is stretchably adjustable to cover container openings of known various sizes.
- the lid is typically made of an elastomeric material - a material which may be stretched to accommodate container openings of various sizes and which at the same time maintains its resiliency such that it will return substantially to its original form after stretching.
- the lid includes a closure panel to be extended over such an opening.
- the closure panel of the lid is sized to be smaller in dimension in an unstretched condition than the smallest of the known container opening sizes so that the closure panel must be stretched to cover the smallest of such known container openings in use.
- the lid further includes a gripping zone proximate the periphery of the closure panel wherein the lid is stretchable to allow engagement of the gripping zone with an opening wall of the container opening to cause the lid to grip and seal the container opening.
- the lid further has an aperture in the closure panel for receiving a drinking straw.
- the aperture is sized snugly to receive such a straw when the closure panel is in a stretched condition.
- the closure panel of the lid may have a domed shape in its relaxed position.
- the domed shape may be sized and provided with an elasticity such that the closure panel will be substantially flat once it is stretched over a container opening in use.
- the lid also includes a gripping zone in the form of an annular bead around the periphery of the closure panel.
- the closure panel of the lid may be substantially planar in its relaxed condition.
- the skirt may extend transversely to the closure panel.
- Each of the above embodiments of a lid may include an aperture means for receiving a drinking straw wherein the aperture means is sized snugly to receive such a straw when the closure panel is in the stretched position.
- the aperture means may comprise a selectively sized hole which is stamped in the closure panel.
- the aperture means may alternatively comprise a weakened zone adapted to be punched out or removed by the user of the lid upon insertion of the straw.
- the lid of the present invention may be made by a method which includes selecting an elastic material and forming the lid out of the elastic material with a closure panel and a gripping zone along the periphery of the closure panel.
- the lid being made to a size which is smaller than the smallest anticipated container opening size so that the lid must be resiliently stretched to be fitted over any of the container openings for the resiliency of the lid to keep it engaged with any of the containers over such an opening.
- the size of the lid and elasticity of the material are further selected in relation to the sizes of the openings and the crush strength of the container walls defining the container openings so that the resiliency or strength of the material of the lid will be sufficient to provide a sealing engagement with any of the selected disposable containers, but will be low enough to avoid crushing of the containers having the largest opening sizes when the lid is mounted onto the container.
- Manufacture may further include the steps of making the lid in any of the shapes or with any of the features described above and below for such lids.
- an elastic container lid which is stretchably adjustable to cover disposable container openings having a maximum linear cross-sectional dimension ranging from approximately 7.62cm (three inches) to approximately 15.24cm (six inches).
- the opening of each such container is defined by an opening wall of the container.
- the containers have a known or readily determined crush strength at the container opening.
- the lid is made of an elastomeric material which substantially retains its resiliency during use and includes a closure panel size to be stretchable over such a range of openings.
- the closure panel is sized to be smaller in dimension in an unstretched condition than the smallest of such container openings sizes so that the closure panel must be stretched to cover the smallest of such container openings in use.
- the lid further includes a gripping zone proximate the periphery of the closure panel which gripping zone is attached to the closure panel so that the lid is stretchable for engaging the gripping zone with such an opening wall to seal such a container.
- the closure panel and gripping zone are selected of an elastomeric material having a strength great enough when stretched to cover a container opening to grip the opening walls without exceeding the crush strength of the container at the container opening. Accordingly, a lid is provided which seals the opening of the container without crushing the disposable container inwardly in use.
- the closure panel of the lid is made of latex rubber having a thickness ranging from approximately 0.00508cm to approximately 0.0203cm (approximately two thousandths of an inch to approximately eight thousandths of an inch).
- the closure panel having a substantially circular shape has a diameter of approximately 5.08cm to 6.35cm (approximately 2 to 21 ⁇ 2 inches).
- the lid further includes an annular skirt made of the same material as the closure panel and having a width of approximately 0.318cm (approximately 1/8 inch) to approximately 1.27cm (approximately 1 ⁇ 2 inch).
- the skirt extends transversely to the closure panel and further includes an annular bead around the periphery of the annular skirt.
- a container for holding liquids or solids has an opening defined by an opening wall and has a lid removably mounted over the opening to seal the container.
- the lid is of an elastomeric material and comprises a closure panel and a gripping zone along the periphery of the closure panel. The lid is resiliently stretched over the opening with the gripping zone engaged with the opening wall such that the resiliency of the lid holds the lid in sealing engagement with the container.
- the present invention overcomes the previously discussed problems by providing a lid which may be utilised with a variety of differently sized containers and may be easily and quickly applied to such containers. Moreover, because of the adjustability of the lid of the present invention, the lid solves the previously discussed inventory problems by providing a single, easily stored lid which fits all anticipated sizes of cups.
- the present invention further overcomes the previously discussed problems by providing a way of providing for the supply of beverages and disposable containers and a way of dispensing beverages and containers having a plurality of differently sized openings which simplifies and expedites the handling of such containers and dispensing such beverages.
- the invention permits the supply of beverages in differently sized disposable containers.
- the invention allows for dispensing beverages and containers having a plurality of different opening sizes and simplifies the process of sealing such containers, whether done by the public or by the entity selling such beverages.
- the basic concept of the present invention is the provision of a lid which is made of an elastomeric material or other material that is resiliently stretchable to fit a fairly wide range of container openings.
- the primary application for such a lid is for closing the disposable cups typically found in fast food restaurants and in convenience stores.
- the lid since the lid is a "one-size-fits-all" lid, the lid solves the significant inventory problems which such businesses face.
- the lid further offers the advantage of being easily applied to a disposable cup, thereby simplifying and expediting the process of handling beverages at the restaurants.
- the lid may be used for a variety of sizes of food and beverage containers such as TUPPERWARE containers.
- the lid 10 includes a closure panel 12 and a gripping zone 14 located along the periphery of the closure panel 12.
- the lid may be made of a number of materials which are resiliently stretchable to provide adjustability of the lid to cover a selected range of container openings. Since the lid 10 is affixed to a container utilising the resiliency of the lid to draw the lid around the container, the closure panel is typically selected to be smaller in dimension in an unstretched condition than the smallest of the anticipated container opening sizes so that the closure panel must be stretched to cover the smallest of such known container openings in use.
- the gripping zone 14 must also be outwardly adjustable to surround the container walls which define a container opening.
- the gripping zone 14, therefore, is also typically made of a material which is resiliently stretchable such that the gripping panel may be stretched outwardly to surround a container wall and such that the gripping zone will tend to contract to an unstretched position to engage the container wall and hold the lid to the container.
- the lid 10 may be made of an elastomeric material having the property of being resiliently stretchable for the anticipated range of lids.
- the closure panel 12 and gripping zone 14 are typically comprised of an elastomeric material.
- the lid is comprised of a latex material which is commonly called Natural Rubber Latex or Hevea Latex which has a chemical designation of CIS-1,4 polyisoprene.
- the closure panel 12 and gripping zone 14 may be formed in a number of shapes.
- the closure panel 12 has a substantially circular cross-section.
- the gripping zone includes an annular skirt 16 extending transversely to the closure panel 12.
- the gripping zone further includes an annular bead 18 disposed around the periphery of the annular skirt 16 to further reinforce the gripping aspect of the gripping zone.
- the annular bead 18 often serves to restrict the outward expansion of the annular skirt 16 and to increase the inward force exerted by the annular skirt 16 on the container walls to ensure suitable gripping by the gripping zone 14 of a container in use.
- the annular bead 18 is formed from part of the annular skirt 16 by rolling the edge of the annular skirt 16 to form an annular rib or bead 18 as shown.
- FIGURE 3 shows an embodiment in which the definition between the closure panel 12 and the annular skirt 16 is less clearly defined than shown for the preferred embodiment in FIGURE 1. That is, the closure panel 12 gently rounds into the annular skirt 16 as shown in FIGURE 3.
- the lid may alternatively have a domed shape in the unstretched position.
- the embodiment shown in FIGURE 4 it has been found that part of the sides of the dome effectively form an annular skirt as designated by 16 when the lid is stretched outwardly over a container opening with the remaining portion of the lid forming the closure panel as designated by 12.
- the stretching of the lid 10 to cover container openings typically flattens the closure panel 12 such that the closure panel is substantially planar in the stretched condition despite its domed shape in the relaxed condition.
- FIGURE 5 shows a variation of the domed shape lid shown in FIGURE 4. In the embodiment shown in FIGURE 5, less of the walls of the dome will form a gripping zone and the majority of the dome will form the closure panel 12.
- the gripping zone is effectively represented by the annular bead 18.
- the gripping zone of the lid 10 may be formed to either of an annular skirt, or an annular bead, or may include both an annular skirt and an annular bead.
- the gripping zone 14 may extend transversely from the closure zone 12 as shown in FIGURE 1 or may simply extend from the periphery of the closure panel 12 as shown in FIGURES 4 and 5.
- the container 30 may comprise any of a number of known containers for holding solid or liquid materials.
- the container is typically comprised of a disposable cup such as found in fast food restaurants or in convenience store locations.
- the container 30 includes a lid 10 which is resiliently stretched over the container opening such that the gripping zone 14 of the lid 10 is engaged with a container wall 32 defining a container opening 34 at the top of the container 30.
- the lid 10 is resiliently stretched over the container opening 34 and the lid is released so that the resiliency of the lid 10 engages the lid in position over the container opening 34.
- the present invention also provides a method for supplying beverages and disposable containers.
- the method includes the steps of providing disposable containers 30 in which some containers have an opening 34 of one size defined by an opening wall 32 and in which some containers have an opening 34 of a different size defined by an opening wall 32.
- the method further includes the step of providing lids 10 of a single size for the containers, with each lid being of an elastic material which retains its elasticity during use and each lid comprising a closure panel 12 and a gripping zone 14 along the periphery of the closure panel wherein the lid is stretchable for engaging the gripping zone with the opening wall of either size opening to seal the opening.
- a method of dispensing beverages and container having a plurality of differently sized openings includes the steps of dispensing a beverage into such a container 30, using lids of a single size for all of the containers, each lid being of an elastic material which retains its elasticity during use.
- Each lid 10 has a closure panel 12 with a gripping zone 14 along its periphery.
- the method further includes the step of resiliently stretching such a lid 10 as shown in FIGURE 7 outwardly over the container opening, engaging the gripping zone 14 about the opening as shown in FIGURE 8, and releasing the resiliency of the lid 10 to engage the lid 10 in position over the container opening 34.
- the present invention still further provides a method of making a lid for use in closing container openings on a range of disposable containers having openings of different sizes wherein the container openings are defined by a container wall.
- the method comprises the steps of selecting an elastic material and forming the lid out of the elastic material with a closure panel 12 and a gripping zone 14 along the periphery of the closure panel 12.
- the lid is made of a size smaller than the smallest anticipated container opening size so that the lid 10 must be resiliently stretched to be fitted over any container openings 34 for the resiliency of the lid 10 to keep it engaged with any of the containers 30 over such an opening 34.
- the size of the lid and the elasticity of the material are selected in relation to the sizes of the openings and the crush strength of the container walls so that the elasticity or resiliency of the material of the lid will be sufficient to provide the sealing engagement of the lid with any of the disposable containers.
- the inward force exerted by the resiliency of elasticity of the lid must not be so great as to cause crushing of the containers when the lid is mounted onto the container.
- the lid is adapted for use with disposable containers typically found in fast food restaurants and convenience stores. It has been found that in the anticipated sizes for such containers range from approximately 7.62cm to approximately 15.24cm (approximately three inches to approximately six inches).
- the closure panel 12 of the lid is then selected to be approximately 6.35cm (approximately two and one-half inches) in diameter such that the lid must be stretched approximately 1.27cm (approximately one-half inch) to cover the smallest container and must be stretched approximately 8.89cm (approximately three and one-half inches) to cover the largest container.
- the annular skirt 16 has a width of approximately 0.635cm (approximately one fourth inch) and the annular skirt 16 includes an annular bead 18 which is a rolled rib around the periphery of the annular skirt 16.
- the lid is comprised of natural rubber latex or Hevea latex having a chemical designation of CIS-1,4 polyisoprene.
- lids having a thickness of approximately 0.00508cm to approximately 0.0203cm would provide the requisite elasticity, stretch, and strength to expand to cover the selected container sizes (a representation of which are shown in Figure 9 as containers 30 a-c), without crushing the disposable containers.
- each of the lids shown in Figures 1 to 6 may further include an aperture means for receiving a drinking straw.
- the aperture means 20 may either include a hole stamped into the lid which is sized to snugly receive such a straw when the closure panel 12 is in a stretched position.
- the aperture means may alternatively include a weakened or perforated portion (as shown by the dashed lines) which may be removed by the user of the lid when inserting the straw.
- the aperture means is preferably sized snugly to receive the straw when the closure panel is stretched in order to minimise leakage of fluid from the beverage container when the straw is inserted.
- the closure panel 12 includes a non-elastic region 25.
- the non-elastic region 25 may comprise a variety of shapes, including ornamental shapes for displaying trademarks or logos of different businesses.
- the elasticity or stretch is provided around the periphery of the non-elastic zone 25. It will be appreciated in view of the above disclosure that the non-elastic zone 25 will limit the range of adjustability of the lid 10 shown in Figure 10.
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- Closing Of Containers (AREA)
Abstract
Description
- The invention relates to closures for non-rigid containers each having a readily deformable opening wall and more specifically it relates to closures for quickly and easily closing containers of various sizes with a single sized closure device.
- Numerous attempts have been made to provide simple and effective lids or other closures for containers. However, perhaps the greatest problems with lids are encountered with lids for disposable containers such as cups at convenience stores or fast food restaurants. Since there are a wide variety of sizes of such containers, the convenience store or fast food restaurant must presently stock a wide variety of sizes of lids to correspond with the variously sized openings of the containers. In practice, the selection of the proper lid and the placement of the lid on the container is often time consuming and, when rushed, can lead to improper installation of the lid, and leakage, and even damage to the container.
- It is therefore desirable to provide means for closing such containers which is rapid and simple to use and which solves the inventory problems presented by current closure devices.
- Accordingly, it is an object of this invention to provide a container lid which can overcome or at least reduce one or more of the disadvantages discussed above.
- Accordingly, the present invention provides an elastic container lid, stretchably adjustable to cover an opening of any of a plurality of disposable non-rigid containers each having a readily deformable opening wall defining a mouth configuration for an opening of the container, each container opening having a diameter ranging from a minimum of approximately 7.62cm (three inches) to approximately 15.24cm (six inches), comprising:-
a closure panel having a predetermined surface area of approximately 6.35cm (approximately two and one-half inches) in diameter in an unstretched condition, the closure panel having a predetermined thickness ranging from approximately 0.00508cm to approximately 0.0203cm (approximately two thousandths of an inch to approximately eight thousandths of an inch), to enable the closure panel to have sufficient elasticity to be stretchable over said maximum container diameter of approximately 15.24cm (approximately six inches) to cover any of said container openings;
a gripping zone extending transversely from the periphery of the closure panel, the gripping zone having a width ranging from approximately 0.318cm to approximately 1.27cm (approximately one-eighth to one-half inches) and a thickness ranging from approximately 0.00508cm to approximately 0.0203cm (approximately two thousandths of an inch to approximately eight thousandths of an inch), the gripping zone further being in the form of an annular bead or including an annular bead along the periphery of the gripping zone for engaging the opening wall of any container of the plurality when the closure panel and gripping zone are resiliently stretched over the opening wall of the containers, wherein in a stretched condition the closure panel seals the container while leaving the mouth configuration of the container opening substantially undisturbed;
the closure panel and the gripping zone being formed of a latex elastomeric material that substantially retains its resiliency during use. - Using the lid of the invention containers may be rapidly and simply closed, especially disposable containers such as beverage containers having varying sized openings.
- In use the lid of the invention provides a way of providing for the supply of beverages in disposable containers. Such supply includes providing disposable containers in which some containers have an opening of one size defined by an opening wall and in which some containers have an opening of a different size defined by an opening wall. According to the invention lids of a single size are provided for the containers, each lid being of an elastic material which retains its elasticity during use. Each lid comprises a closure panel and a gripping zone along the periphery of the closure panel and is stretchable for engaging the gripping zone with the opening wall of either size opening to seal the opening.
- In an alternative, the lid of the invention provides a way of dispensing beverages in containers having a plurality of differently sized openings. Such dispensing includes dispensing a beverage into such a container. Lids of a single size are used for all of the differently sized containers, each lid being of an elastic material which retains its elasticity during use. Each lid has a closure panel with a gripping zone along its periphery. Dispensing includes the step of resiliently stretching such a lid over the container opening, engaging the gripping zone about the opening, and releasing the lid for the resiliency of the lid to engage the lid in position over the container opening.
- Thus, in general terms, the present invention provides an elastic container lid which is stretchably adjustable to cover container openings of known various sizes. The lid is typically made of an elastomeric material - a material which may be stretched to accommodate container openings of various sizes and which at the same time maintains its resiliency such that it will return substantially to its original form after stretching. The lid includes a closure panel to be extended over such an opening. For container openings of known sizes, the closure panel of the lid is sized to be smaller in dimension in an unstretched condition than the smallest of the known container opening sizes so that the closure panel must be stretched to cover the smallest of such known container openings in use. The lid further includes a gripping zone proximate the periphery of the closure panel wherein the lid is stretchable to allow engagement of the gripping zone with an opening wall of the container opening to cause the lid to grip and seal the container opening.
- In a preferred aspect, the lid further has an aperture in the closure panel for receiving a drinking straw. The aperture is sized snugly to receive such a straw when the closure panel is in a stretched condition.
- In an alternative embodiment of the present invention, the closure panel of the lid may have a domed shape in its relaxed position. The domed shape may be sized and provided with an elasticity such that the closure panel will be substantially flat once it is stretched over a container opening in use. The lid also includes a gripping zone in the form of an annular bead around the periphery of the closure panel. In an alternative aspect of such an embodiment there may be an annular skirt extending from the periphery of the closure panel, and the annular skirt may further include the annular bead extending from around the periphery of the annular skirt.
- In another alternative embodiment of the present invention, the closure panel of the lid may be substantially planar in its relaxed condition. Moreover, in still another alternative embodiment, the skirt may extend transversely to the closure panel.
- Each of the above embodiments of a lid may include an aperture means for receiving a drinking straw wherein the aperture means is sized snugly to receive such a straw when the closure panel is in the stretched position. The aperture means may comprise a selectively sized hole which is stamped in the closure panel. The aperture means may alternatively comprise a weakened zone adapted to be punched out or removed by the user of the lid upon insertion of the straw.
- The lid of the present invention may be made by a method which includes selecting an elastic material and forming the lid out of the elastic material with a closure panel and a gripping zone along the periphery of the closure panel. The lid being made to a size which is smaller than the smallest anticipated container opening size so that the lid must be resiliently stretched to be fitted over any of the container openings for the resiliency of the lid to keep it engaged with any of the containers over such an opening. The size of the lid and elasticity of the material are further selected in relation to the sizes of the openings and the crush strength of the container walls defining the container openings so that the resiliency or strength of the material of the lid will be sufficient to provide a sealing engagement with any of the selected disposable containers, but will be low enough to avoid crushing of the containers having the largest opening sizes when the lid is mounted onto the container. Manufacture may further include the steps of making the lid in any of the shapes or with any of the features described above and below for such lids.
- In a preferred embodiment of a lid made in accordance with the above manufacturing method, an elastic container lid is provided which is stretchably adjustable to cover disposable container openings having a maximum linear cross-sectional dimension ranging from approximately 7.62cm (three inches) to approximately 15.24cm (six inches). The opening of each such container is defined by an opening wall of the container. The containers have a known or readily determined crush strength at the container opening. The lid is made of an elastomeric material which substantially retains its resiliency during use and includes a closure panel size to be stretchable over such a range of openings. The closure panel is sized to be smaller in dimension in an unstretched condition than the smallest of such container openings sizes so that the closure panel must be stretched to cover the smallest of such container openings in use. The lid further includes a gripping zone proximate the periphery of the closure panel which gripping zone is attached to the closure panel so that the lid is stretchable for engaging the gripping zone with such an opening wall to seal such a container. The closure panel and gripping zone are selected of an elastomeric material having a strength great enough when stretched to cover a container opening to grip the opening walls without exceeding the crush strength of the container at the container opening. Accordingly, a lid is provided which seals the opening of the container without crushing the disposable container inwardly in use.
- In a preferred aspect of this embodiment of a lid, the closure panel of the lid is made of latex rubber having a thickness ranging from approximately 0.00508cm to approximately 0.0203cm (approximately two thousandths of an inch to approximately eight thousandths of an inch). In the most preferred aspect of this embodiment, the closure panel having a substantially circular shape has a diameter of approximately 5.08cm to 6.35cm (approximately 2 to 2½ inches).
- In a still preferred embodiment of the present invention, the lid further includes an annular skirt made of the same material as the closure panel and having a width of approximately 0.318cm (approximately 1/8 inch) to approximately 1.27cm (approximately ½ inch). The skirt extends transversely to the closure panel and further includes an annular bead around the periphery of the annular skirt.
- In yet still another embodiment of the present invention, a container for holding liquids or solids is provided. The container has an opening defined by an opening wall and has a lid removably mounted over the opening to seal the container. The lid is of an elastomeric material and comprises a closure panel and a gripping zone along the periphery of the closure panel. The lid is resiliently stretched over the opening with the gripping zone engaged with the opening wall such that the resiliency of the lid holds the lid in sealing engagement with the container.
- Accordingly, the present invention overcomes the previously discussed problems by providing a lid which may be utilised with a variety of differently sized containers and may be easily and quickly applied to such containers. Moreover, because of the adjustability of the lid of the present invention, the lid solves the previously discussed inventory problems by providing a single, easily stored lid which fits all anticipated sizes of cups.
- The present invention further overcomes the previously discussed problems by providing a way of providing for the supply of beverages and disposable containers and a way of dispensing beverages and containers having a plurality of differently sized openings which simplifies and expedites the handling of such containers and dispensing such beverages. By using lids of a single size for all of the anticipated containers and by resiliently stretching the lid outwardly to cover the container, the invention permits the supply of beverages in differently sized disposable containers. Furthermore, the invention allows for dispensing beverages and containers having a plurality of different opening sizes and simplifies the process of sealing such containers, whether done by the public or by the entity selling such beverages.
- The invention will be further illustrated by reference to the appended drawings which illustrate particular preferred embodiments of the lid and container constructed in accordance with the present invention.
- Figure 1 is a side view of the preferred embodiment of a lid constructed according to the present invention;
- Figure 2 is a top view of the lid shown in Figure 1; Figure 2 is also a top view of the lid shown in Figures 3 to 6;
- Figure 3 is a side view of an alternative embodiment of a lid constructed in accordance with the present invention;
- Figure 4 is a side view of another alternative embodiment of a lid constructed in accordance with the present invention;
- Figure 5 is a side view of another alternative embodiment of a lid constructed in accordance with the present invention;
- FIGURE 6 is a side view of another alternative embodiment of a lid constructed in accordance with the present invention;
- FIGURE 7 is a side view of a container and lid constructed in accordance with the present invention in which the lid is shown in an unstretched position before application to the container;
- FIGURE 8 is a side view of the container shown in FIGURE 7 with the lid stretched and installed in place on the container;
- FIGURE 9 is a plan view of a lid of the present invention and three differently sized containers illustrating the relative dimension of the lid in relation to such differently sized containers;
- FIGURE 10 is a top view of a lid constructed in accordance with the present invention in which only the periphery of the closure panel of the lid is constructed of elastomeric material; and
- FIGURE 11 is a top view of various other container openings which are suitable for use in accordance with the present invention.
- The basic concept of the present invention is the provision of a lid which is made of an elastomeric material or other material that is resiliently stretchable to fit a fairly wide range of container openings. The primary application for such a lid is for closing the disposable cups typically found in fast food restaurants and in convenience stores. For these uses, since the lid is a "one-size-fits-all" lid, the lid solves the significant inventory problems which such businesses face. For fast food restaurants, the lid further offers the advantage of being easily applied to a disposable cup, thereby simplifying and expediting the process of handling beverages at the restaurants.
- It has been found, however, that such a lid has other applications. For example, the lid may be used for a variety of sizes of food and beverage containers such as TUPPERWARE containers. These and other advantages provided by the methods and apparatus of the present invention will become more apparent in view of the following disclosure.
- Referring now to Figures 1 and 2, the preferred embodiment of the present invention is shown. The
lid 10 includes aclosure panel 12 and a grippingzone 14 located along the periphery of theclosure panel 12. The lid may be made of a number of materials which are resiliently stretchable to provide adjustability of the lid to cover a selected range of container openings. Since thelid 10 is affixed to a container utilising the resiliency of the lid to draw the lid around the container, the closure panel is typically selected to be smaller in dimension in an unstretched condition than the smallest of the anticipated container opening sizes so that the closure panel must be stretched to cover the smallest of such known container openings in use. - In turn, the gripping
zone 14 must also be outwardly adjustable to surround the container walls which define a container opening. The grippingzone 14, therefore, is also typically made of a material which is resiliently stretchable such that the gripping panel may be stretched outwardly to surround a container wall and such that the gripping zone will tend to contract to an unstretched position to engage the container wall and hold the lid to the container. - Accordingly, the
lid 10 may be made of an elastomeric material having the property of being resiliently stretchable for the anticipated range of lids. In the preferred embodiment, theclosure panel 12 and grippingzone 14 are typically comprised of an elastomeric material. In a presently most preferred embodiment, the lid is comprised of a latex material which is commonly called Natural Rubber Latex or Hevea Latex which has a chemical designation of CIS-1,4 polyisoprene. - Referring again to FIGURES 1-6, the
closure panel 12 and grippingzone 14 may be formed in a number of shapes. In the preferred embodiment shown in FIGURES 1 and 2, theclosure panel 12 has a substantially circular cross-section. The gripping zone includes anannular skirt 16 extending transversely to theclosure panel 12. The gripping zone further includes anannular bead 18 disposed around the periphery of theannular skirt 16 to further reinforce the gripping aspect of the gripping zone. In particular, theannular bead 18 often serves to restrict the outward expansion of theannular skirt 16 and to increase the inward force exerted by theannular skirt 16 on the container walls to ensure suitable gripping by the grippingzone 14 of a container in use. In the preferred embodiment, theannular bead 18 is formed from part of theannular skirt 16 by rolling the edge of theannular skirt 16 to form an annular rib orbead 18 as shown. - Referring now to FIGURES 3-6, there are shown alternative embodiments of a
lid 10 constructed in accordance with the present invention. FIGURE 3 shows an embodiment in which the definition between theclosure panel 12 and theannular skirt 16 is less clearly defined than shown for the preferred embodiment in FIGURE 1. That is, theclosure panel 12 gently rounds into theannular skirt 16 as shown in FIGURE 3. - Referring now to FIGURE 4, the lid may alternatively have a domed shape in the unstretched position. When the embodiment shown in FIGURE 4 is used, it has been found that part of the sides of the dome effectively form an annular skirt as designated by 16 when the lid is stretched outwardly over a container opening with the remaining portion of the lid forming the closure panel as designated by 12. In turn, the stretching of the
lid 10 to cover container openings typically flattens theclosure panel 12 such that the closure panel is substantially planar in the stretched condition despite its domed shape in the relaxed condition. - FIGURE 5 shows a variation of the domed shape lid shown in FIGURE 4. In the embodiment shown in FIGURE 5, less of the walls of the dome will form a gripping zone and the majority of the dome will form the
closure panel 12. - In the embodiment shown in FIGURE 6, the gripping zone is effectively represented by the
annular bead 18. - Hence, in accordance with the present invention, the gripping zone of the
lid 10 may be formed to either of an annular skirt, or an annular bead, or may include both an annular skirt and an annular bead. Moreover, the grippingzone 14 may extend transversely from theclosure zone 12 as shown in FIGURE 1 or may simply extend from the periphery of theclosure panel 12 as shown in FIGURES 4 and 5. - Referring now to FIGURES 7 and 8, the container constructed in accordance with the present invention is shown. The
container 30 may comprise any of a number of known containers for holding solid or liquid materials. In the preferred embodiment, the container is typically comprised of a disposable cup such as found in fast food restaurants or in convenience store locations. Thecontainer 30 includes alid 10 which is resiliently stretched over the container opening such that the grippingzone 14 of thelid 10 is engaged with acontainer wall 32 defining a container opening 34 at the top of thecontainer 30. Thelid 10 is resiliently stretched over the container opening 34 and the lid is released so that the resiliency of thelid 10 engages the lid in position over the container opening 34. - The present invention also provides a method for supplying beverages and disposable containers. The method includes the steps of providing
disposable containers 30 in which some containers have an opening 34 of one size defined by an openingwall 32 and in which some containers have an opening 34 of a different size defined by an openingwall 32. The method further includes the step of providinglids 10 of a single size for the containers, with each lid being of an elastic material which retains its elasticity during use and each lid comprising aclosure panel 12 and a grippingzone 14 along the periphery of the closure panel wherein the lid is stretchable for engaging the gripping zone with the opening wall of either size opening to seal the opening. - In yet another method of the present invention, a method of dispensing beverages and container having a plurality of differently sized openings is provided. Referring to FIGURES 7 and 8, the method includes the steps of dispensing a beverage into such a
container 30, using lids of a single size for all of the containers, each lid being of an elastic material which retains its elasticity during use. Eachlid 10 has aclosure panel 12 with a grippingzone 14 along its periphery. The method further includes the step of resiliently stretching such alid 10 as shown in FIGURE 7 outwardly over the container opening, engaging the grippingzone 14 about the opening as shown in FIGURE 8, and releasing the resiliency of thelid 10 to engage thelid 10 in position over the container opening 34. - The present invention still further provides a method of making a lid for use in closing container openings on a range of disposable containers having openings of different sizes wherein the container openings are defined by a container wall. The method comprises the steps of selecting an elastic material and forming the lid out of the elastic material with a
closure panel 12 and a grippingzone 14 along the periphery of theclosure panel 12. The lid is made of a size smaller than the smallest anticipated container opening size so that thelid 10 must be resiliently stretched to be fitted over any container openings 34 for the resiliency of thelid 10 to keep it engaged with any of thecontainers 30 over such an opening 34. In this method, the size of the lid and the elasticity of the material are selected in relation to the sizes of the openings and the crush strength of the container walls so that the elasticity or resiliency of the material of the lid will be sufficient to provide the sealing engagement of the lid with any of the disposable containers. At the same time, the inward force exerted by the resiliency of elasticity of the lid must not be so great as to cause crushing of the containers when the lid is mounted onto the container. - In the preferred embodiment, the lid is adapted for use with disposable containers typically found in fast food restaurants and convenience stores. It has been found that in the anticipated sizes for such containers range from approximately 7.62cm to approximately 15.24cm (approximately three inches to approximately six inches). The
closure panel 12 of the lid is then selected to be approximately 6.35cm (approximately two and one-half inches) in diameter such that the lid must be stretched approximately 1.27cm (approximately one-half inch) to cover the smallest container and must be stretched approximately 8.89cm (approximately three and one-half inches) to cover the largest container. Referring to Figures 1 and 2, in the preferred embodiment, theannular skirt 16 has a width of approximately 0.635cm (approximately one fourth inch) and theannular skirt 16 includes anannular bead 18 which is a rolled rib around the periphery of theannular skirt 16. As stated above, the lid is comprised of natural rubber latex or Hevea latex having a chemical designation of CIS-1,4 polyisoprene. It has been found that lids having a thickness of approximately 0.00508cm to approximately 0.0203cm (two thousandths (.002) of an inch to eight thousandths (.008) of an inch) would provide the requisite elasticity, stretch, and strength to expand to cover the selected container sizes (a representation of which are shown in Figure 9 ascontainers 30 a-c), without crushing the disposable containers. - Referring again to Figure 2, each of the lids shown in Figures 1 to 6 may further include an aperture means for receiving a drinking straw. As shown in Figure 2, the aperture means 20 may either include a hole stamped into the lid which is sized to snugly receive such a straw when the
closure panel 12 is in a stretched position. The aperture means may alternatively include a weakened or perforated portion (as shown by the dashed lines) which may be removed by the user of the lid when inserting the straw. In either case, the aperture means is preferably sized snugly to receive the straw when the closure panel is stretched in order to minimise leakage of fluid from the beverage container when the straw is inserted. - Referring now to Figure 10, there is shown an alternative embodiment of the present invention. In the embodiment shown in Figure 10, the
closure panel 12 includes anon-elastic region 25. Thenon-elastic region 25 may comprise a variety of shapes, including ornamental shapes for displaying trademarks or logos of different businesses. In this embodiment of the present invention, the elasticity or stretch is provided around the periphery of thenon-elastic zone 25. It will be appreciated in view of the above disclosure that thenon-elastic zone 25 will limit the range of adjustability of thelid 10 shown in Figure 10. - The instant invention has been disclosed in connection with specific embodiments. However, it will be apparent to those skilled in the art that variations from the illustrated embodiments may be undertaken without departing from the scope of the invention as defined by the claims which follow.
Claims (14)
- An elastic container lid (10), stretchably adjustable to cover an opening of any of a plurality of disposable non-rigid containers (30) each having a readily deformable opening wall (32) defining a mouth configuration (34) for an opening of the container, each container opening having a diameter ranging from a minimum of approximately 7.62cm (three inches) to approximately 15.24cm (six inches), comprising:-
a closure panel (12) having a predetermined surface area of approximately 6.35cm (approximately two and one-half inches) in diameter in an unstretched condition, the closure panel (12) having a predetermined thickness ranging from approximately 0.00508cm to approximately 0.0203cm (approximately two thousandths of an inch to approximately eight thousandths of an inch), to enable the closure panel (12) to have sufficient elasticity to be stretchable over said maximum container diameter of approximately 15.24cm (approximately six inches) to cover any of said container openings (34);
a gripping zone (14) extending transversely from the periphery of the closure panel (12), the gripping zone (14) having a width ranging from approximately 0.318cm to approximately 1.27cm (approximately one-eighth to one-half inches) and a thickness ranging from approximately 0.00508cm to approximately 0.0203cm (approximately two thousandths of an inch to approximately eight thousandths of an inch), the gripping zone (14) being in the form of an annular bead or further including an annular bead (18) along the periphery of the gripping zone (14) for engaging the opening wall (32) of any container (30) of the plurality when the closure panel (12) and gripping zone (14) are resiliently stretched over the opening wall (32) of the containers (30), wherein in a stretched condition the closure panel (12) seals the container (30) while leaving the mouth configuration of the container opening (34) substantially undisturbed;
the closure panel (12) and the gripping zone (14) being formed of a latex elastomeric material that substantially retains its resiliency during use. - An elastic container lid according to claim 1, in which the closure panel (12) of the lid (10) has a domed shape in its relaxed position.
- An elastic container lid according to claim 2, in which the closure panel (12) of the lid (10) is substantially flat in its stretched condition.
- An elastic container lid according to claim 1, in which the closure panel (12) of the lid (10) is substantially planar in its relaxed condition and in which the gripping zone (14) is in the form of an annular skirt (16) extending from the closure panel (12).
- An elastic container lid according to claim 4, in which the skirt (16) extends transversely to the closure panel (12).
- An elastic container lid according to claim 1, in which the closure panel (12) of the lid (10) includes aperture means (20) for receiving a drinking straw, the aperture means (20) being sized snugly to receive such a straw when the closure panel (12) is in a stretched position covering such a container opening (34).
- An elastic container lid according to claim 1, in which the annular bead (18) comprises a rolled edge of the lid (10).
- A method using elastomeric lids of a single size each having a closure panel (12) and gripping zone (14) along its periphery, for sealing any of a plurality of non-rigid, disposable containers (30) each having a readily deformable opening wall (32) defining a mouth configuration for an opening (34) of the container (30), each container opening (34) having a diameter ranging from a minimum of approximately 7.62 cm (approximately three inches) to a maximum of approximately 15.24 cm (approximately six inches), the closure panel (12) of each lid (10) having a predetermined surface area and thickness to enable the closure panel (12) to be stretchable to cover the opening (34) of any of the plurality of containers (10) comprising the steps of:(a) resiliently stretching the closure panel (12) and gripping zone (14) of a first lid (10) over the opening wall (32) of a first container (30), the first container (30) having an opening (34) of a first diameter;(b) engaging the gripping zone (14) of the first lid (10) about the opening wall (32) of the first container (30);(c) releasing the first lid (10) such that the closure panel (12) in a stretched condition seals the first container (30) while leaving the mouth configuration of the opening (34) of the first container (30) substantially undisturbed; and(d) repeating steps (a)-(c) for a second container (30) using a second lid (10), the second container (30) having an opening of a second diameter different from the first diameter of the first container (30).
- In a combination with a plurality of non-rigid, disposable containers (30) each having a readily deformable opening wall (32) defining a mouth configuration for an opening (34) of the container (30), each container (30) opening having a diameter ranging from a minimum of approximately 7.62 cm (approximately three inches) to a maximum of approximately 15.24 cm (approximately six inches) a single size elastomeric lid (10), comprising:
a closure panel (12) having a predetermined surface area and thickness to enable the closure panel (12) to be stretchable to cover the opening (34) of any of the plurality of containers (30); and
a gripping zone (14) along the periphery of the closure panel (12) for engaging the opening wall (32) of a container (30) when the closure panel (12) and gripping zone (14) are resiliently stretched over the opening wall (32) of the container (30), wherein in a stretched condition the closure panel (12) seals the container (30) while leaving the mouth configuration of the container opening (34) substantially undisturbed. - The combination as described in claim 9, wherein the gripping zone (14) of the elastomeric lid (10) is an annular skirt (16) extending from around the periphery of the closure panel (12).
- The combination as described in claim 10, wherein the gripping zone (14) includes an annular bead (18) extending from around the periphery of the annular skirt (16).
- The combination as described in claim 9, wherein the gripping zone (14) is an annular bead (18) extending from around the periphery of the closure panel (12).
- The combination as described in claim 12, wherein the annular bead (18) comprises a rolled edge of the closure panel (12).
- The combination as described in claim 9 wherein the closure panel (12) of the lid (10) includes aperture means (20) for receiving a drinking straw, the aperture means (20) being sized snugly to receive such a straw when the closure panel (12) is in a stretched position.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT8888910196T ATE104633T1 (en) | 1987-10-09 | 1988-10-05 | METHOD AND EQUIPMENT FOR SEALING CONTAINERS. |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10737187A | 1987-10-09 | 1987-10-09 | |
US107371 | 1987-10-09 | ||
PCT/US1988/003458 WO1989003351A1 (en) | 1987-10-09 | 1988-10-05 | Method and apparatus for closing containers |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0391941A1 EP0391941A1 (en) | 1990-10-17 |
EP0391941B1 true EP0391941B1 (en) | 1994-04-20 |
Family
ID=22316293
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88910196A Expired - Lifetime EP0391941B1 (en) | 1987-10-09 | 1988-10-05 | Method and apparatus for closing containers |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0391941B1 (en) |
JP (1) | JPH03500525A (en) |
CN (1) | CN1035087A (en) |
AU (1) | AU2723988A (en) |
CA (1) | CA1325406C (en) |
DE (1) | DE3889224T2 (en) |
DK (1) | DK88990A (en) |
ES (1) | ES2015115A6 (en) |
WO (1) | WO1989003351A1 (en) |
ZA (1) | ZA887571B (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO891734L (en) * | 1989-04-26 | 1990-10-29 | Ken Heimreid | CLOSURE DEVICE FOR CONTAINERS FOR ANY INFECTED LIQUIDS. |
US4948009A (en) * | 1989-12-28 | 1990-08-14 | Takashi Sawatani | Straw-insertable lid for paper cup |
NL1000689C2 (en) * | 1995-06-29 | 1997-11-28 | Silvia Cannata | Elastic seal for apertures |
DE10231063A1 (en) * | 2002-07-10 | 2004-01-29 | Sig Technology Ltd. | Method for applying a reclosable pouring element to a container and container produced thereafter |
EP2504250B1 (en) * | 2009-11-26 | 2016-10-19 | Albert John David | Structure for a storage unit |
US8381946B2 (en) | 2010-06-24 | 2013-02-26 | Sussex Im, Inc. | Container having a pre-curved lid |
US8657138B2 (en) | 2010-06-24 | 2014-02-25 | Sussex Im, Inc. | Container having a pre-curved lid |
US8245875B2 (en) | 2010-06-24 | 2012-08-21 | Sussex Im, Inc. | Container having a pre-curved lid |
ITLU20120009A1 (en) * | 2012-07-02 | 2014-01-03 | Luigi Rossini | UNIVERSAL ELASTIC COVER FOR CONTAINER |
CN104176371B (en) * | 2014-08-20 | 2017-04-26 | 周福义 | Pipe flange protection cover |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR974761A (en) * | 1947-11-10 | 1951-02-26 | Advanced cap for airtight sealing of jars, bottles and similar containers | |
BE512448A (en) * | 1951-02-21 | |||
FR1354584A (en) * | 1963-04-17 | 1964-03-06 | Lid especially for jars, as well as jars fitted with this lid |
-
1988
- 1988-10-05 DE DE3889224T patent/DE3889224T2/en not_active Expired - Fee Related
- 1988-10-05 JP JP63509322A patent/JPH03500525A/en active Pending
- 1988-10-05 EP EP88910196A patent/EP0391941B1/en not_active Expired - Lifetime
- 1988-10-05 WO PCT/US1988/003458 patent/WO1989003351A1/en active IP Right Grant
- 1988-10-05 AU AU27239/88A patent/AU2723988A/en not_active Abandoned
- 1988-10-06 CA CA000579487A patent/CA1325406C/en not_active Expired - Fee Related
- 1988-10-08 CN CN88108426A patent/CN1035087A/en active Pending
- 1988-10-10 ES ES8803082A patent/ES2015115A6/en not_active Expired - Fee Related
- 1988-10-11 ZA ZA887571A patent/ZA887571B/en unknown
-
1990
- 1990-04-09 DK DK088990A patent/DK88990A/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE3889224T2 (en) | 1994-11-24 |
ES2015115A6 (en) | 1990-08-01 |
EP0391941A1 (en) | 1990-10-17 |
DE3889224D1 (en) | 1994-05-26 |
ZA887571B (en) | 1989-07-26 |
DK88990D0 (en) | 1990-04-09 |
CA1325406C (en) | 1993-12-21 |
DK88990A (en) | 1990-05-03 |
JPH03500525A (en) | 1991-02-07 |
CN1035087A (en) | 1989-08-30 |
AU2723988A (en) | 1989-05-02 |
WO1989003351A1 (en) | 1989-04-20 |
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