CORELESS TISSUE ROLLS

摘要

Coreless rolls of tissue, such as rolls of bath tissue or paper towels, are produced by winding tissue logs on a mandrel having retractable pins. During winding, the pins extend and penetrate the first several windings of the log as it is initially wound, which prevents slippage. After the winding is complete, the pins retract to allow the tissue log to slide off of the mandrel for subsequent slitting into individual product rolls and packaging. The penetration of the pins into the first several windings of the log tends to mechanically entangle and structurally unify those windings to create a “soft core”. At the same time, the properties of the tissue sheets within the soft core are the same as the other sheets within the roll and are therefore usable by the consumer.

主权项

1. A method of winding a moving web upon a mandrel comprising:
conveying a moving web having a leading edge; providing a mandrel, the mandrel being adapted to adhere the moving web at a specific circumferential location on the mandrel, the mandrel further including a reference marker to identify the specific circumferential location; engaging the mandrel with a position drive control to control the rotational speed of the mandrel; determining the position of the reference marker with a position sensor; setting the rotational speed of the mandrel to allow transfer of the leading edge of the moving web near the specific circumferential location; transferring the moving web to the mandrel near the specific circumferential location; and winding the moving web.