Method of packing articles with heat shrinkable films
AssigneeShowa Seitai Kogyo Kaisha Ltd.
InventorAkio Saito
Life of this patent
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Abstract
An article is packed with a heat shrinkable film having a width larger than that of the article. The film is moved in contact with a heating member and then immediately wrapped under tension about the article with the opposite side edges of the film protruded beyond the opposite ends of the article. At the same time, the film shrinks about the article to tightly pack it not only on the peripheral surface but also on the end surfaces of the article.
Claims5
A method of packing an article with a heat shrinkable film comprising the steps of moving the heat shrinkable film, contacting the film against a heating member heated to a predetermined temperature sufficient to cause the film to shrink, and then immediately wrapping under a predetermined tension the heated film about an article to be packed having a width smaller than that of the heat shrinkable film with the side edges of the film protruded beyond the opposite ends of said article, and causing said film to shrink, thus tightly packing the article not only on the peripheral surface but also on the end surface of the article by the heat shrunk film.
A method of packing an article with heat shrinkable films, each having a width larger than that of said article, comprising the steps of continuously moving said article, continuously advancing a pair of heat shrinkable films toward said article from the opposite sides thereof, contacting the films against a pair of heating rollers movable toward and away from each other and heated to a predetermined temperature sufficient to cause said films to shrink, moving said heating rollers firstly away from each other and then toward each other while said article is moving continuously thereby covering the periphery and the end surfaces of said article by the heated films with the side edges thereof protruded beyond the opposite sides of the article and fusing together said pair of heat shrinkable films by said heating rollers while simultaneously causing the films to shrink about said article, and severing said films at the fused portion.
Dependencies are inferred from the claim text.