Tubular core with polymer plies
AssigneeSonoco Development, Inc.
InventorJohannes Wim van de Camp
Life of this patent
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Abstract
A tubular core and associated method of manufacture are provided. The tubular core includes at least one inner ply and at least two plastic plies disposed thereon. The inner ply, which can be paper or plastic, has an inner surface upon which identifying indicia are printed, for example, before the tube is formed and while the inner ply is in a flat configuration. The first and second plastic plies are disposed on the inner ply and adhered so that the second plastic ply substantially covers the inner ply and the first plastic ply.
Claims30
A tubular core for receiving a product wound thereon, the core comprising:
- at least one inner ply wrapped about a longitudinal axis to form a tubular body having an inner surface and an outer surface, the inner surface of the inner ply being printed with identifying indicia, the inner ply being paper;
- a first plastic ply disposed on the outer surface of the inner ply and adhered to the inner ply, the first plastic ply having an outer surface disposed opposite the inner ply;
- and
- a second plastic ply disposed on the outer surface of the first plastic ply and adhered to the first plastic ply, the second plastic ply substantially covering the inner ply and the first plastic ply.
A tubular core for receiving a product wound thereon, the core comprising:
- at least one inner ply spirally wrapped about a longitudinal axis to form a tubular body having an inner surface and an outer surface, the inner surface of the inner ply being printed with identifying indicia, the inner ply being paper;
- a first plastic ply spirally wrapped on the outer surface of the inner ply to define a helical seam, the first plastic ply covering the outer surface of the inner ply and adhered thereto, and having an outer surface disposed opposite the inner ply, and
- a second plastic ply spirally wrapped on the outer surface of the first plastic ply and adhered to the first plastic ply, the second plastic ply at least partially overlapping the seam defined by the first plastic ply and substantially covering the inner ply and the first plastic ply.
A method for manufacturing a tubular core for receiving a product wound thereon, the method comprising:
- printing a first side of at least one inner ply of paper with identifying indicia;
- spirally winding the at least one inner ply onto a mandrel extending in a longitudinal direction such that the inner ply forms a tubular body with the first side disposed radially inward to form an inner surface and having an outer surface opposite the inner surface;
- spirally winding a first plastic ply onto the outer surface of the inner ply and adhering the first plastic ply thereto, the first plastic ply having an outer surface disposed opposite the inner ply, and
- spirally winding a second plastic ply onto the outer surface of the first plastic ply and adhering the second plastic ply thereto such that the second plastic ply substantially covers the inner ply and the first plastic ply.
Dependencies are inferred from the claim text.