Abstract:
The invention is a centerwinder for receiving and winding web material sequentially on one of at least two fixed shafts. The two or more shafts are desirably positioned vertically to one another in a stationary structure and eliminate the need for a powered turret assembly. A lay-on roll assembly can be used that pivots in and out as well as up and down for serving the respective shaft locations. A cylinder linkage provides the same or constant force against the winding roll on either the upper or the lower shaft. Transfer rolls in desirable embodiments are automatically pivoted into the proper position for a fully automatic transfer or to assist the operator during a manual cut and transfer.
Abstract:
An apparatus for continuously winding a web of sheet material into rolls comprises a turret mechanism (1) comprising two or more winding mandrels (2,3,4,5). The turret mechanism (1) is rotatably indexed to bring each mandrel (2,3,4,5) in turn into a winding position in which it is rotatably driven to wind a web of sheet material (8) connected thereto into a roll, and to bring the adjacent mandrel lying immediately behind it in the direction of rotation of the turret into contact with the web (8). The adjacent mandrel is rotatable. Rotary element (11) is adapted for selective engagement with the adjacent mandrel, which rotary element (11) is rotatably driven in the opposite direction to the adjacent mandrel and at a greater speed. The apparatus further comprises a web cutting mechanism (16) adapted to cut the web (8) at a point lying between the current rewind mandrel and the adjacent mandrel. The cut end of the web is directed by the cutting mechanism between the adjacent mandrel and the rotary element (11), such that by rotating the adjacent mandrel through a few turns the web is wrapped around it. The turret is then indexed forward to move the adjacent mandrel into the rewind position.
Abstract:
A roll changer for delivering a web of material has, for edge-aligned connection of the trailing end of a delivered web with the leading end of the web from a new roll, in addition to the web edge-sensor controlling the position of the delivery roll during such delivery, a roll sensor responsive to the position of the edge of the outermost turn of the new roll, adjusting the axial position of the new roll. The sensors are switched to the respective controllers upon rotation of the roll turret to deliver a new roll to the waiting position.
Abstract:
An improved rider roll assembly and winder, especially adapted for use on turret winders in the winding of sheet materials. The rider roll assemblies on the turret arms are mounted on the same axis as the winding rolls. The angular position of a rider roll may be controlled by control means such as a programmable controller operating through connecting linkages.
Abstract:
A paper web rewind device includes a rewind turret having circumferentially spaced support members with end chucks for rotatably supporting tubular cores on which a web is rewound. Each set of supports is separately rotated and the turret is rotated to locate one core at a rewind station and the second core at an unload/load station. A rider roll at the rewind station is pivotally mounted and moves upwardly onto the core and then outwardly as the roll diameter increases. Just prior to completion of a rewound roll, the turret rotates and moves the rewinding roll while continuing to wind web thereon and also moves a new core to the loading station with rider roll moved to engage the new core. The moving web engages the new core which is rotated at winding speed. A sensor senses the turret position and is operable to decrease the winding speed of the wound roll to create a slack loop between the new core and the wound roll. The high speed rotating new core attracts the slack web onto the new core and the web wraps onto the new core and into the nip between the new core and rider roll. The rotation of the wound roll is stopped and the rotating new roll pulls on the slack loop and creates a sudden snap action force on the web. The snap action force separates the web immediately adjacent the rider roll on a line extending across the web and thereby frees the web for a continuous winding onto the new core.
Abstract:
An apparatus and method for transferring a moving web from one windup core to another windup core comprising a plurality of rotatable core chucks mounted on a revolvable turret, means for leading said web towards said cores, and means for forming and severing a leader strip of web material for subsequent securing to an empty cylindrical windup core.
Abstract:
A device for feeding or winding up a web to or from a web using machine such as a web printing machine or a painting, coating, spreading or laminating machine, comprises two lateral uprights carrying one or two pairs of arms which are turnable about substantially horizontal axes and which carry at their free ends means for mounting the ends of a core on which a roll of web is or is to be wound, one of the arms carrying a drive motor for driving the core to rotate to wind-up or feed off web from the roll; the arms are hollow box section elements and the motor is housed within the interior which can also be provided with a brake and with means for circulating cooling air.
Abstract:
Continuously supplied sheet material, e.g. synthetic-resin foils is wrapped around the upper of two vertically spaced cores as these cores are rotated about their axes. The two cores are then swung through 180* to move the upper core to the position of the lower core and vice versa, thereby stretching the sheet over a deflecting roller extending between a pair of mounting assemblies or stars (spiders) carrying these cores. The core then in the lower position is rotated until the outer surface of the roll formed thereon is immediately adjacent the upper core, whereupon the sheet is cut and the cut end is wound on the upper core. The lower filled core is replaced with an empty core and the mounting assemblies are again swung through 180*.
Abstract:
A web winding and cutting apparatus capable of automatically cutting and coiling relatively short lengths of a material in web form onto a core. Excessive damage of the material at the leading edge of the freshly cut web is avoided because the cutting cycle is very short and because a mechanism provides for immediately tightening the web onto the core, so that slipping of the web cannot occur. Cutting is carried out by a mechanism through sudden release of stored energy and optimum tightening of the web onto the core is obtained by controlling the coefficients of friction between the web and the core at one side and between the web and a pressure roller at the other side.
Abstract:
In a multiple-winding machine with continuously advanced web material, an empty core is positioned upstream of the almostcompleted core and held against the running web by axially grasping winding shafts and by rolls forming a three-point support. A self-aligning knife transversally severs the web on said empty core onto which the web is subsequently wound after an airblast maintains the new leading edge of the web thereon. The full core is then removed and two rolls forming two points of said three-point support as well as said knife are swung away.