Envelopes – wrappers – and paperboard boxes – Paperboard box – With inner flexible or flaccid bag liner
Reexamination Certificate
1999-02-22
2001-05-08
Elkins, Gary E. (Department: 3727)
Envelopes, wrappers, and paperboard boxes
Paperboard box
With inner flexible or flaccid bag liner
C229S117310, C229S125040, C229S125080, C229S125150
Reexamination Certificate
active
06227440
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATIONS
Not Applicable
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not Applicable.
BACKGROUND OF THE INVENTION
This invention relates to paperboard cartons used to hold flowable solid materials, such as liquids, grains, cereals, flour, etc., and, in particular, to a such a carton which is per-lined and includes a pouring spout.
Currently, many products, such as breakfast cereals and grains, are sold in paperboard boxes. Sometimes the product is simply held directly in the box. That is, there is no lining on the inner surface of the box. Other times, as is often with products such as breakfast cereals, the product is contained within a wax bag inside of the paperboard carton. When a wax bag is used, the wax bag, generally, is formed and filled with the product. Then the paperboard box or carton is formed around the filled wax bag. Lined cartons can be made more efficiently.
Further, such cartons could be provided with a spout to make pouring of the product easier. In the cartons which do have spouts (i.e., boxes of rice or other grains), the spout is simply a hole defined by perforations in the carton, either on the top of the carton, or at the top of a side wall of the carton. Such spouts are often difficult to open and result in a cardboard panel extending into the carton. Further, this cardboard panel often interferes with pouring or the product from the box.
BRIEF SUMMARY OF THE INVENTION
A pre-lined carton of the present invention includes a carton formed from a blank having a liner adhered to the inner surfaces of the carton. The carton includes a pour spout which is movable between a closed position and an open position. The carton has a panel which covers the pour spout and is removed to expose the pour spout. The opening created by the removable panel is sized to allow the spout to be moved from its closed position to its open position.
The spout is part of a mounting assembly which includes a mounting panel to which the spout is hingedly connected. The mounting panel is glued to the inner surface of the container so that the spout will be between the mounting panel and the container wall. The spout assembly mounting panel includes an opening which communicates with the spout, and which is aligned with the removable panel of the container.
The liner is glued to a surface of the pour spout. The liner is etched to create an area of weakness where the liner is glued to the spout. The spout is initially closed to prevent access to product within the liner. However, upon opening the spout for a first time, an opening forms in the liner to allow the product to be poured out of the carton. This enables the container to be shipped with product in it and with the liner in a fully closed condition.
The pre-lined carton is formed by (1) providing a tube of a desired size; (2) closing one end of the tube to define a pouch; (3) providing a carton blank; (4) applying glue to an inner surface of the carton blank; (5) setting the pouch on the carton blank to glue the pouch to the carton blank; and (6) folding the carton around the pouch. Preferably, the carton is compressed after it is folded around the pouch or liner to ensure that the liner is glued to all the side wall surfaces of the container. The spout assembly is formed and glued to the carton blank prior to applying the liner to the carton blank. A portion of the liner or pouch is etched, as noted above, to create an easily openable portion of the liner. This portion of the liner is glued to an inner surface of the spout.
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Denk Paul M.
Elkins Gary E.
Smurfrit-Stone Container Corporation
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