초록 ▼

A thermoformable plastic commerical refuse container is rotationally molded with a pair of metal lifting sleeves in situ' molded into the container. The side walls of the container are designed to accept the metal sleeves internally of the container and to distribute the lifting stress over the wall

A thermoformable plastic commerical refuse container is rotationally molded with a pair of metal lifting sleeves in situ' molded into the container. The side walls of the container are designed to accept the metal sleeves internally of the container and to distribute the lifting stress over the wall. The container walls are outwardly projected above the sleeves so as to increase the available storage volume of the container. An improved box-shaped top flange design is used to tie the walls of the container together and to provide increased strength and rigidity.

대표청구항 ▼

1. In a refuse container having a substantially rectangular shaped molded plastic body defined by first and second opposed end walls, a front wall, a rear wall and a bottom, the improvement comprising: an extension formed in each of said end walls, said extension forming a stepped indentation in

1. In a refuse container having a substantially rectangular shaped molded plastic body defined by first and second opposed end walls, a front wall, a rear wall and a bottom, the improvement comprising: an extension formed in each of said end walls, said extension forming a stepped indentation in each of said end walls protruding outwardly of said container; first and second metal sleeves, said sleeves being attached to a corresponding one of said end walls at said stepped indentation inside said container; and an opening formed in each of said extensions whereby said container may be lifted by arms inserted into said sleeves. 2. The container of claim 1 wherein said extension is narrower in width than said side wall and each of said sleeves include a portion protruding through its corresponding extension. 3. The container of claim 2 wherein said extension has an internal lower surface defining said stepped indentation, an internal side surface defining a portion of said end wall, and first and second end portions, each of said sleeves having a first face attached to said side surface and a second face attached to said lower surface. 4. The container of claim 3 wherein said end portions include first sections extending perpendicularly with respect to the plane of said container bottom and second sections extending from said first sections to corresponding points adjacent the uppermost intersections of said end walls with said front and rear walls whereby stress caused by lifting of said container using said sleeves is uniformly distributed. 5. The container of claim 4 wherein the cross-sectional area above said stepped indentation is greater than the cross-sectional area below said stepped indentation. 6. The container of claim 3 wherein each of said sleeves protrude through said first and second end portions of corresponding ones of said extensions. 7. The container of claim 3 wherein said sleeves are positioned with approximately 3/4" inch spacing between each of said first and second face of said sleeve and the corresponding portion of said end wall to thereby permit plastic to surround said sleeve. 8. The container of claim 2 wherein said protruding portion is approximately 1/4" in length. 9. The container of claim 1 or claim 4 wherein said rear wall is higher than said front wall. 10. The container of claim 1 wherein said molded plastic comprises cross-linked polyethylene. 11. The container of claim 1 wherein said sleeves are attached to said end walls by in situ molding during manufacture of said container. 12. The container of claim 11 wherein said sleeves are encased in plastic by said in situ molding. 13. The container of claim 1 and including a double folded top flange joining each of said end walls to said front and rear walls. 14. The container of claim 13 wherein said top flange comprises an in situ molded box-like cross sectional flange having a substantially flat top surface. 15. The container of claim 14 wherein said top flange includes at least two hinge lugs attached to said flat top surface. 16. The container of claim 1 and including first and second rib portions molded in situ to said front wall in a position to distribute stress on said front wall when said container is lifted. 17. A method for manufacturing a container adapted for lifting by first and second opposed lifting forks: providing first and second metal sleeves each having an internal dimension sufficient to accept one of the first and second lifting forks; forming a refuse container having an extension on each end thereof, each extension defining an internal pocket in the container sized to fit one of the sleeves; and attaching each of the sleeves to a corresponding one of the pockets internally of the container such that ends of the sleeves protrude from opposing sides of the extensions for accepting the lifting forks. 18. The method of claim 17 wherein said steps of forming a refuse container and attaching the sleeves includes the steps of: constructing a hollow mold having a shape corresponding to a desired shape of the container; positioning the sleeves within the mold in a desired final position; depositing a quantity of powdered plastic resin sufficient to form the container into the mold; rotating the molded in a manner to cause the resin to be distributed therein; and heating the mold to melt the resin whereby the sleeves are in situ bonded to the container.