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US 4,282,984 AGranted
Composite container structure
AssigneeNone recorded
InventorByron V. Curry, Jr.
Life of this patent
Estimating the term…
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AssigneeNone recorded
InventorByron V. Curry, Jr.
Estimating the term…
A composite structure is shown wherein a fibrous body or a tube such as a convolute or spirally wound paper tube or mold pulp bucket supports a plastic liner within the body to form a container. The material forming the mouth of the plastic liner is overlapped around at least one end of the supporting body and the outer overlapped layer of plastic is shrunk onto and around the outer side at the end of the support. In one form of the invention, the liner may be sealed at one end to form a bag suspended within the container to hold the product and caps may be applied to the open end or in the case of a tubular body, caps can be applied to the opposite ends of the body to complete the package. Prior to the sealing the mouth of the bag with a cap crimped onto the support body over the overlapped liner material, if appropriate, the contents of the bag may be subjected to a vacuum or a pressurized condition may be established within the container to hold the contents under the most appropriate conditions for storage. In another form of the container, after the liner has been put in its place, the outside of the composite structure can be surrounded by a resin tube that is then shrunk in place over the outer surface of the filled paper tube and its capped ends to prestress the paper tube with a compressive force. Another aspect of the invention includes the mounting of a bail handle on means carried by the paper wall of the container, the can being adapted to contain a liquid such as paint. The plastic inner liner serves as a barrier layer to protect the paper support from penetration by the liquid and seals the bail mounting against leakage from inside the can.
A composite container having an outer support and an inner liner surrounding the space within the container and top and bottom rigid gas impervious cover means adapted to be seamed onto the container for cooperating with said liner to seal the contents placed in the storage space within the structure, comprising a fibrous tubular member having a generally circular crossection defined by exterior and interior walls and forming an open ended outer support member, said tubular means having an aperture therein to form a window, a tubular shrinkable plastic barrier film inner liner fitted within the support member for covering said window, said liner having a portion thereof extending beyond at least one of the ends of said tubular member, said liner being flexible and impervious to gas flow, said liner being sealed at one end and having said other open end extending from within the support member and beyond an open end of the support member to define the mouth of the tubular liner, a portion of the mouth of said liner that extends beyond the support member being folded over and around to overlap the exterior wall of the support member at said one end of said at least one of the ends of said support, the overlapped portion of the liner being heat shrunk to be wrinkle-free and tightly conforming to the exterior surface of the support member at said one end thereof, said heat shrunk overlapped portion of the mouth of the liner forming a plastic ring integral with that open end of the support member, said ring forming a smooth seat for cooperating with the top cover means seamed to the support member over said ring to seal the mouth of the liner, the bottom cover means being crimped to the other end of the support member, said plastic liner being supported within the fibrous member having a product stored within the liner which together with the cover means seamed to the support member over the ring forms a gastight impervious container enclosing the storage space for the product to protect such product when there is a difference in pressure between the storage space within the container and the pressure on the outside thereof, and said liner covering said window serving as a means through which the contents of the container can be visible while the condition of the liner exposed across said window indicates the maintenance of the pressure condition within the container.
A paper container such as a can for paint or other fluids, said container being provided with a generally semi-circular bail handle having bearings on its ends that cooperate with bearing support means fixed to the opposite sides of the outside of the paper wall means of the container, comprising a structure wherein said wall means is a self-sustaining paper form, the container having a mouth defined by the upper periphery of said wall, bearing support means for said bail bearings, said bearing support means including elements disposed 180.degree. apart around the outside of said side wall means adjacent the mouth of the container, said elements having bearing engaging means to cooperate with the bearings on the ends of the bail, said bearing support means having integral deformable elements adapted to be pushed through said paper wall means, said elements being deformed to lie flat against the inside surface of said wall means, a plastic liner adapted to be supported on the inside wall of said can to seal the fluid contained therein from penetrating the paper wall, said liner covering the deformed elements on the inside wall, and said liner having a portion wrapped over at least the end of the container that forms the mouth of the can, said wrapped-over portions being shrunk onto the outer periphery of the wall, and a cover for said can adapted to be sealed against said portion of the liner that is shrunk onto the outside wall of the container to seal the contents of said can within the liner and under the cover.
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper…:…
Preservation of meat, sausages, fish or fish products
Handles: bail handles, i.e. pivoted rigid handles of generally semi-circular shape with pivot points on two opposed sides or wall parts of the…
Articles or materials enclosed in two or more containers disposed one within another: liquids or semi-liquids or other materials or articles…
Term ended 11 Aug 1998 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
Various types of liners within paper tubes are known as exemplified in the U.S. Pat. Nos. 156,693 to Chinnock, Nov. 10, 1874; 2,159,835 to Waters, May 23, 1939 and 2,557,576 to Simmons, June 19, 1951. These patents all show waterproof bags merely inserted within paper cartons that are then capped to complete a package.
U.S. Pat. Nos. 3,627,116 to Cooper, Dec. 14, 1971; 3,976,795 to Ando, Aug. 24, 1976 and 4,018,904 to Muraoka, Apr. 19, 1977, disclose variations of paper or plastic containers having an outer covering of plastic shrunk in place to seal the package and in some cases, to hold the cap in place or to hold the package assembled. U.S. Pat. No. 3,604,584 to Shank, Sept. 14, 1971, shows the shrinking of an abrasion resistant plastic cover onto a glass article to cover the bottom and a portion of the side wall of the container.
It should be noted too, that solid plastic containers have been proposed for use in the past to contain paint and certain other liquids distributed commercially in containers, such as in gallon buckets, however, due to limitations of expense and size, such containers have not been considered economical for use in such trade. As far as can be determined, metal cans are used almost exclusively in the retail paint distribution outlets and no paper bucket structures have ever been adapted successfully for commercial use in transporting fluids.
FIG. 1 is a sectional view showing a partially assembled composite tubular paper body with the resin liner in the form of a bag in place within the support with the mouth of the liner overlapped around one end of the support;
FIG. 1a is a bottom view taken on line 1a--1a of FIG. 1.
FIG. 2 shows the overlapped plastic shrunk onto the outer surface of the end of the support;
The composite support and plastic lined means that forms the package here shown is adapted for holding a product to be preserved and, if desired, the product may be sealed at atmospheric pressure or either under pressure or vacuum for indefinite periods of time until the product is to be used. Tennis balls, for example, may be packaged under pressure to preserve their bounce. Likewise coffee, peanuts, and other perishable products can be preserved under vacuum or an inert gas may be filled into the container to preserve the product at atmospheric pressure. Liquids such as paint, maple syrup or fats and oils or the like, may be stored at atmospheric pressure.
In its preferred form, the composite structure makes use of a conventional paper tube formed by wrapping several plies of paper strip in a spiral on a cylindrical mandrel to form an elongated tubular means. A desired length of tubing is cut from the elongated tube to produce the individual support body 9. The ends 10 of the tubular support are preferably flared slightly in a known manner for the purpose of receiving a cap 11 that is ultimately crimped onto the body after a plastic liner and the product to be stored has been placed within the body 9.
As shown in FIG. 1, a plastic liner 12 is loosely fitted within body 9 and at least at one end of the body, the liner extends over the top of the body and the material at the open mouth of the liner is pulled down around the outside of the body 9 about an inch. The outer overlapped material is then shrunk by known procedures to cause it to shrink into a skintight fit around the periphery of the body 9 to form a skirt 13 that is substantially integral in a skin-tight fit with the open end and around the outer surface of the support 9. The other end of the liner can be sealed at 14, as shown in FIG. 3, to produce a bag that is freely suspended within the container. In another form of the invention, as shown in FIGS. 4 and 5, the other end of the liner can be wrapped around the other end of the support body to be shrunk against the periphery at the other end of body 9 to produce the skintight skirt 15.