Back to results
US 4,450,962 AGranted
Packaging or containing of bituminous products
AssigneeRussell Matthews Industries Limited
InventorsJohn B. Matthews, Roger H. Keller
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeRussell Matthews Industries Limited
InventorsJohn B. Matthews, Roger H. Keller
Estimating the term…
A container for containment of bituminous products formed by inner and outer flexible casings in intimate contact. The inner casing is of a material which has a softening temperature which is above that of the bituminous product when loaded into the container but below that of the bituminous product when it is applied in use, usually by spraying. This inner casing material has a viscosity at the application temperature which enables the material when melted with the bituminous product to be applied therewith. The outer casing is made from a material which has strength characteristics which enable it to contain the inner casing and bituminous product during the filling of the container as well as during transportation and storage thereof. The outer casing is impervious to movement therethrough of the contained bituminous product, components or additives thereof and preferably has a softening temperature such that melting does not occur at the application temperature.
A container for packaging roading grade bitumen comprising an inner flexible casing located in intimate contact with a separate outer flexible casing, said inner casing being of a material which has a softening temperature greater than the temperature of the bitumen when the bitumen is loaded into said container but lower than the temperature at which the bitumen is applied in use, the inner casing material having a viscosity at the bitumen application temperature which enables the inner casing when melted with the bitumen to be applied therewith, the outer casing being of a plastic material which does not adhere to the inner casing, has a softening temperature which is such that melting does not occur at the bitumen application temperature, and has a strength characteristic which enables the outer casing to support and contain the inner casing during container filling with bitumen, transportation and storage, but which can be readily stripped from the inner casing to leave the bitumen contained solely within the inner casing.
A package of road grade bitumen comprising said bitumen located inside of a container which comprises an inner flexible casing located in intimate contact with a separate outer flexible casing, said inner casing being of a material which has a softening temperature greater than the temperature of the bitumen when the bitumen is loaded into said container but lower than the temperature at which the bitumen is applied in use, the inner casing material having a viscosity at the bitumen application temperature which enables the inner casing when melted with the bitumen to be applied therewith, the outer casing being of a plastic material which does not adhere to the inner casing, has a softening temperature which is such that melting does not occur at the bitumen applicaion temperature, and has a strength characteristic which enables the outer casing to support and contain the inner casing during container filling with bitumen, transportation and storage, but which can be readily stripped from the inner casing to leave the bitumen contained solely within the inner casing.
A method for packaging, transporting and using road grade bitumen, said method comprising heating the bitumen to be packaged to a flowable temperature, and thereafter flowing said bitumen into a container comprising an inner flexible casing located in intimate contact with a separate outer flexible casing, said inner casing being of a material which has a softening temperature greater than the temperature of the bitumen when the bitumen is loaded into said container but lower than the temperature at which the bitumen is applied in use, the inner casing material having a viscosity at the bitumen application temperature which enables the inner casing when melted with the bitumen to be applied therewith, the outer casing being of a plastic material which does not adhere to the inner casing, has a softening temperature which is such that melting does not occur at the bitumen application temperature, and has a strength characteristic which enables the outer casing to support and contain the inner casing during container filling with bitumen, transportation and storage, but which can be readily stripped from the inner casing to leave the bitumen contained solely within the inner casing, sealing the inner and outer casings after the bitumen has been loaded into the inner casing to prevent escape of said bitumen during transport, transporting the packaged bitumen, removing said outer casing, and heating the inner casing and bitumen packaged therein to melt the inner casing material into the bitumen, and thereafter applying the melted inner casing and bitumen to a road surface.
Dependencies are inferred from the claim text.