Box and method of covering a box edge
AssigneeMax Sandherr AG
InventorWalter Schellenberg
Life of this patent
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Abstract
The exposed edge of a box is covered by placing a strip of heat-shrinkable PVC around the box so that it projects axially beyond the box edge and heating the strip so that the projecting portion shrinks and bends over the box edge, covering it. The projecting portion can be made to project far enough so that, when the strip shrinks and bends, a portion protrudes inwardly beyond the box edge. That protruding portion is then pressed against the inner box wall by a fitted lid or mandrel. A second strip can then be applied in similar fashion and shrunk to form a guarantee seal between the box and lid. An end of the second strip is left free to provide a seal tearing grip.
Claims7
A method of covering the exposed edge of a box having an open end comprising the steps of
- placing a heat-shrinkable adhesive plastic foil strip around the peripheral area of the open end of the box adjacent to the box edge with a portion of the width of the foil strip projecting beyond the box edge;
- and
- heating the projecting portion of the strip to cause the projecting portion to shrink and to bend inwardly over the box edge substantially at a right angle to the box wall and to thereby cover the box edge.
Dependencies are inferred from the claim text.