Continuous pressure roll winder

In a turret-type winder for continuously winding a web of material, including stands supporting a transverse main shaft, a pair of turret arms on the main shaft having spindles at their remote ends for receiving transversely oriented cores thereon, onto which a web of sheet material is to be continuously wound, each of said turret arms including means defining secondary arm support plates associated therewith, each carrying a pair of pivotally mounted secondary arms with their remote ends extending on either side of said support plates, the improvement comprising:

• a primary web guiding and pressure roll carried on one of the remote ends of each of said secondary arms,
• each of said primary pressure rolls being movable into engagement with one of said cores and the winding rolls formed on said cores while maintaining a relative position on said winding roll throughout its minimum to maximum diameter with the lead-in web in a partially wrapped condition on said pressure roll as said turret is indexed to carry the winding roll from a cut-off station through approximately 180.degree. to an unloading station,
• a pair of auxiliary rolls, one each supported on the opposite ends of said secondary arms remote from said pressure rolls, and
• means interconnecting said primary and auxiliary rolls to be rotated together at the same speed by the engagement of one of said pressure rolls with a building roll on said turret arms.

The method of operating a turret-type winder in which a pair of roll-receiving spindles are carried on the opposite ends of a pair of turret arms which are indexed through approximately 180.degree. for the winding of a roll on a core mounted on said spindles, comprising the steps of:

• providing a web lead path to a core on one end of said arms at a position between said core and the turret axis,
• rotating said core in the direction to cause said web to be wrapped from the inside surface thereof,
• indexing said turret arms while continuing to wrap a building roll on said core to a 180.degree. roll unloading position and simultaneously bringing the empty turret arms at the outer end of said turret through said web path so that the spindle ends of said empty arms are positioned on the side of said web path opposite said building roll,
• pressing the web at the point of tangency to the building roll throughout the building of the web and in all indexed positions of said turret arms, and
• loading a new core on said empty turret arms.

The method of operating a turret-type winder in which roll-receiving spindles are carried on the opposite ends of a pair of turret arms which are indexed through approximately 180.degree. for the winding of a roll on a core mounted on said spindles, comprising the steps of:

• providing a web lead path to a core on one end of said arms at a position between said core and the turret axis,
• applying said web to said core while rotating said core in a direction to cause said web to form a nip at a surface of the core between the spindle axis and the turret axis,
• applying pressure to the web at the point of tangency to the building roll on said core,
• indexing said turret arms while continuing to apply said pressure to said a building roll and moving said roll to a roll unloading position, and
• completing the winding of said web on said roll while maintaining said pressure at said nip.