Method and apparatus for producing coreless rolls of sheet...

Details Method and apparatus for producing coreless rolls of sheet... Method and apparatus for producing coreless rolls of sheet...

B - Operations, Transporting

65

H

B65H 18/16 (2006.01) B65H 18/04 (2006.01) B65H 18/26 (2006.01) B65H 18/28 (2006.01) B65H 23/198 (2006.01) B65H 75/24 (2006.01)

Patent

CA 2228020

A roll of sheet material, such as plastic film wrap, having an inner layer wound at low tension and an outer layer wound under greater tension provides a coreless roll. Eliminating the need for a core reduces the cost of producing rolls of sheet material, and reduces the weight and outer dimensions of the roll with a consequent reduction in shipping and storage costs. An apparatus and method for producing such a roll, from a pre-wound master roll or as part of a production lint for forming the sheet material, involves varying the longitudinal tension applied to sheet material as it is wound onto an expandable mandrel. After the roll has cured, the mandrel is collapsed and disengaged from the roll to provide a coreless roll.

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