Coreless paper roll manufacturing system
AssigneeJames River Paper Company, Inc.
InventorLawrence E. Weinert
Life of this patent
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Abstract
A system for forming coreless paper rolls having a center aperture of a predetermined cross-sectional configuration. The coreless paper roll is initially formed by winding a web about a first mandrel element having a first cross-sectional configuration and a distal end differing from the predetermined cross-sectional configuration. After the roll is formed it is slid over a second mandrel element having an outer surface with a second cross-sectional configuration to change the shape of the coreless paper roll center aperture from the first cross-sectional configuration to the predetermined cross-sectional configuration.
Claims9
Mandrel apparatus for forming coreless paper rolls having a center aperture of a predetermined cross-sectional configuration, said mandrel apparatus comprising, in combination:
- a first mandrel element, said first mandrel element comprising an elongated winding shaft having an axis of rotation, a distal end, and a first cross-sectional configuration differing from said predetermined cross-sectional configuration;
- and
- a second mandrel element connected to the distal end of said first mandrel element, said second mandrel element having an outer surface with a second cross-sectional configuration differing from said first cross-sectional configuration and engageable with a formed coreless roll being stripped from said mandrel to change the shape of said coreless paper roll center aperture from said first cross-sectional configuration to said predetermined cross-sectional configuration.
A method of forming a coreless paper roll having a center aperture of a predetermined cross-sectional configuration, said method comprising the steps of:
- winding a paper web about a rotating first mandrel element having a distal end and a first cross-sectional configuration differing from said predetermined cross-sectional configuration to form said coreless paper roll;
- after said winding step, stripping said coreless paper roll from said first mandrel element over said distal end;
- simultaneously with said stripping step, passing a second mandrel element through the center aperture of said coreless roll, said second mandrel element having an outer surface with a second cross-sectional configuration differing from said first cross-sectional configuration;
- and
- during said passing step, modifying the shape of the inner wound layers of said coreless paper roll to change the shape of the coreless roll center aperture from said first cross-sectional configuration to said predetermined cross-sectional configuration.
Dependencies are inferred from the claim text.