Special receptacle or package – Shock protection type – With distinct corner or edge protector
Reexamination Certificate
1999-08-27
2001-02-13
Foster, Jim (Department: 3728)
Special receptacle or package
Shock protection type
With distinct corner or edge protector
C206S320000, C428S034200
Reexamination Certificate
active
06186329
ABSTRACT:
BACKGROUND
1. Field of the Invention
This patent relates to packaging for large appliances such as washers, dryers and refrigerators. More particularly, this patent relates to an improved tubular-type corner post or side post comprising more than one grade of paper in the transverse direction.
2. Description of the Related Art
Corner posts are used to cushion the corners of large, heavy appliances (such as washers, dryers, refrigerators, dishwashers and stoves) during storage and transport and to provide resistance against axially directed compressive loads.
Conventional tubular corner posts are made of a single sheet of paper wound into a convolute (coiled) tube. Adhesive is often used to bond the paper layers. Before the adhesive dries, the tube is shaped into the desired shape, typically one with a modified “L” shaped cross section to fit snugly between the corner of an appliance and the corner of the appliance container.
One disadvantage of conventional corner posts is that they are made from only a single grade of paper. Because only a single grade of paper is used, the interior, middle and exterior layers of the corner post wall are made of the same grade of paper. Savings can be realized by substituting less expensive paper in the middle of the corner post wall.
Thus the primary object of the present invention is to provide an improved corner post that can be made from more than one type of paper.
Another object of the present invention is to provide a corner post having different grades of paper along the transverse direction.
Yet another object of the present invention is to provide a corner post having a strong-weak-strong paper configuration along the transverse direction.
Another object of the present invention is to provide a corner post having better cushion in the transverse direction.
Still another object of the present invention is to provide a corner post that is less expensive to manufacture than conventional corner posts.
Further and additional objects will appear from the description, accompanying drawings, and appended claims.
SUMMARY OF THE INVENTION
The present invention is an improved post for supporting and cushioning a product. The post has an outer wall and an inner wall substantially coextensive with the outer wall. The outer and inner walls are laterally spaced from one another and define a hollow interior therebetween.
The post is made from a blank comprising at least two, and preferably three, sheets of paper. When the blank is wound and formed into a tube, the second sheet is interposed between the first and third sheets in the transverse direction.
The ends of the sheets are joined together in such a way that the post has a uniform wall thickness. In one embodiment the adjoining ends of the sheets are skived and joined together with adhesive. In another embodiment the adjoining ends are densified and the overlapping areas are joined with adhesive.
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Bullwinkel Partners Ltd.
Foster Jim
Sonoco Development Inc.
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