Paperboard cartons with liquid-proof liners
AssigneeFlag Carton Corporation Ltd.
InventorJames A. Malcolm
Life of this patent
Estimating the term…
Abstract
A container for liquids such as milk comprises an outer paperboard carton and an inner tubular liner of flexible plastic film adhered to the carton, the liner being adhered to the walls of the carton adjacent diagonally opposite corners of one end of the carton. The sidewalls of the carton adjacent one of these corners are formed with a line of weakness, the liner being adhered to the carton on either side of this line so that the corner may be lifted from the remainder of the carton to split both the carton and the liner and allow the contents of the container to be discharged from a pouring lip thus formed at the corner of the container.
Claims13
A knocked down container that can be erected into a rectangular box that has a liner and is suitable for holding and dispensing fluid material, comprising a paperboard blank having four rectangular side forming panels, flaps protruding beyond the ends of the panels for closing the ends of the box, a flexible tubular liner arranged flat on the inner surfaces of a pair of adjoining panels and coterminous with the total width of said pair of panels, the liner protruding longitudinally beyond the ends of said pair of panels, a seal closing one end of the liner, the other end of the liner being unsealed, said seal extending widthwise of the liner whereby when the box is erected, said seal extends adjacent one diagonal of one end of the box, areas on the blank being adhesively attached to the liner at locations adjacent the ends of the other diagonal of said box end, the adhesive at said locations being longitudinally spaced from said seal by a distance half the length of said other diagonal whereby when the box is erected the liner will be taut adjacent said other diagonal, and wherein the blank is weakened along a line extending into two adjacent side forming panels and across one of said areas, providing when the box is erected a corner of the box adhered to the liner which corner can be lifted to tear the box and liner simultaneously along the weakened line and leave a pouring lip on the container.
A container comprising an outer folded paperboard carton having flat rectangular ends, an inner flexible bag containing fluid material, the bag substantially filling the carton and being affixed thereto and supported thereby, wherein the bag is adhesively affixed to areas of the interior of the carton adjacent the ends of one diagonal of one end of the carton and is taut adjacent said diagonal, wherein two adjacent sidewalls of the carton have a line of weakness extending across one of said areas around a corner of the carton adjacent one end of said diagonal so that an area in which the bag is adhered to the carton extends across said line, whereby by lifting said corner of the carton the container can be opened along said line of weakness and the bag will simultaneously tear therealong.
Dependencies are inferred from the claim text.