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US 11,548,754 B2Granted
Reinforced wood fiber core
AssigneeSouhegan Wood Products Inc.
InventorRandolph A Dunn
Life of this patent
Estimating the term…
Abstract
A winding core with improved beam and hoop strength and diminished friability and method for manufacturing such a core are provided, the winding core comprising: an extruded wood fiber core member; and at least one preformed paper shell member having a split seam parallel to its major axis, the shell being adhered to an exterior surface of the extruded wood fiber core member and a secondary shell of wooden staves.
Claims12
A winding core, the winding core comprising:
- An extruded wood fiber core member;
- At least a first paper shell member said shell member being adhered to an exterior surface of said extruded wood fiber core member such that there are substantially no gaps between said first paper shell member and said exterior surface of said extruded wood fiber core member and;
- A shell layer comprising a plurality of wood staves disposed around the external circumference of said first paper shell member.
A method for manufacturing a winding core, said method comprising:
- Providing an extruded wood fiber core member having an external diameter;
- Splitting a first paper tube along a line parallel to said first tube's major axis, said first tube having an interior diameter less than the external diameter of said extruded wood fiber core member;
- Applying an adhesive to said extruded wood fiber core member;
- Opening said paper tube along said line and placing said paper tube around said extruded wood fiber core member;
- and
- Clamping said tube to said extruded wood fiber core member and allowing said adhesive to cure such that said paper tube is bonded to said extruded wood fiber core substantially free of gaps;
- and
- Affixing wooden staves parallel to the major axis of said extruded fiber core.
5 more elements
Dependencies are inferred from the claim text.