Abstract:
A method and apparatus for unwinding a vertically oriented roll of web material is disclosed. The roll comprises a lower surface, an upper surface and a circumferential surface. The apparatus comprises: at least one drive element adapted to rotate the vertically oriented roll, a sensor adapted to measure a tension of the web, and a controller adapted to adjust a speed of the web according to the tension of the web. The method comprises steps of rotating the roll, determining a desired web tension, and adjusting the speed of the roll according to the desired web tension.
Abstract:
A method for processing high bulk tissue webs includes forming a wet web, drying the web, winding the dried web to form a plurality of parents rolls (R), unwinding the parent rolls by transmitting torque through the roll center and/or ends, moving the partially unwound roll to effect splicing with a subsequent parent roll, and rewinding the thus united web. In particular embodiments, the torque transmitting means (20) comprise side clamping mechanisms that engage only the end surfaces of the parent rolls. In other embodiments, an automated off-line method for splicing tissue webs from different parent rolls utilizes a finishing unit (23) that substantially continuously impacts each web during unwinding the splice the webs together.
Abstract:
The invention relates to a unit (1, 1', 1'', 1''' ) for supporting and unwinding a reel (2) of web material having a central through-hole (4); this unit (1, 1', 1", 1"' ) comprises a support plane (5), provided with a through-hole (8) and adapted to receive and support the reel (2) with its hole (4) coaxial to the hole (8) of the support plane (5); and a releasable fastening device (6) adapted to engage the cited holes (4, 8) and cooperate with the reel (2) to lock it on the support plane (5); one of the support plane (5) and the fastening device (6) is displaceable with respect to the other between the support plane (5) and the fastening device (6) between a first operative configuration, in which the fastening device (6) projects with respect to the support plane (5) on the side where the reel (2) rests, and a second operative configuration, in which the fastening device (6) is contained between the support plane (5) and a side of the support plane (5) opposite to the side where the reel (2) rests.
Abstract:
A novel apparatus and method for processing high bulk tissue webs are disclosed for forming a wet web, drying the web, winding the dried web to form a plurality of parent rolls, and unwinding the parent rolls by transmitting torque through the roll center and/or ends. The partially unwound roll is moved for splicing with a subsequent parent roll, and the united web is rewound. The torque transmitting means include side clamping mechanisms engaging only the end surfaces of the parent rolls. In one aspect, an automated off-line apparatus and method splice tissue webs from different parent rolls in a finishing unit, and substantially continous impacts on each web during unwinding splice the webs together.
Abstract:
A novel apparatus and method for processing high bulk tissue webs are disclosed for depositing an aqueous suspension of papermaking fibers onto an endless forming fabric to form a web, drying the web to form a dried web having a bulk of 9.0 grams per cubic centimeters or greater, winding the dried web to form a plurality of large diameter parent rolls wound on a core, and transporting the parent rolls to an unwind stand having torque transmitting clamping means (160) for engaging opposite end surfaces of the parent rolls. A backing plate (168) is operably connected to and rotatable with an unwind shaft (162) connected to an electric drive. An inflatable bladder (164) is mounted on the backing plate. The clamping means engage a first parent roll (R) by inflating the bladder such that the opposite end surfaces of the roll are sandwiched between the side clamping mechanisms for partially unwinding the first parent roll using a variable speed drive operably associated with the clamping means.
Abstract:
The invention relates to a unit (1, 1', V ', 1' ' ' ) for supporting and unwinding a reel (2) of web material having a central through-hole (4); this unit (1, 1', 1", 1" ' ) comprises a support plane (5), provided with a through-hole (8) and adapted to receive and support the reel (2) with its hole (4) coaxial to the hole (8) of the support plane (5); and a releasable fastening device (6) adapted to engage the cited holes (4, 8) and cooperate with the reel (2) to lock it on the support plane (5); one of the support plane (5) and the fastening device (6) is displaceable with respect to the other between the support plane (5) and the fastening device (6) between a first operative configuration, in which the fastening device (6) projects with respect to the support plane (5) on the side where the reel (2) rests, and a second operative configuration, in which the fastening device (6) is contained between the support plane (5) and a side of the support plane (5) opposite to the side where the reel (2) rests.
Abstract:
A novel apparatus and method for processing high bulk tissue webs are disclosed for forming a wet web, drying the web, winding the dried web to form a plurality of parent rolls, and unwinding the parent rolls by transmitting torque through the roll center and/or ends. The partially unwound roll is moved for splicing with a subsequent parent roll, and the united web is rewound. The torque transmitting means include side clamping mechanisms engaging only the end surfaces of the parent rolls. In one aspect, an automated off-line apparatus and method splice tissue webs from different parent rolls in a finishing unit, and substantially continous impacts on each web during unwinding splice the webs together. In one aspect, a novel apparatus and method of making and processing high bulk tissue webs are disclosed for the production of a soft, high bulk uncreped throughdried tissue web by depositing an aqueous suspension of papermaking fibers onto an endless forming fabric to form a web and drying the web by throughdrying to final dryness without any significant differential compression to form a dried web having a bulk value of about 15 to 25 cubic centimeters per gram or greater, an MD Stiffness Factor of 50 to 100 kilograms, a machine direction stretch of 15 to 25 percent, and a substantially uniform density. A torque transfer device for unwinding a tissue roll having a circumferential surface, opposite end surfaces, an inner core surface, an outside diameter of at least about 60 inches, and a width between the opposite end surfaces of at least about 55 inches, includes a frame having a pair of arms spaced apart to accommade the width of the roll, each arm having a side clamping mechanism mounted thereon and adapted to engage one of the opposite end surfaces of the tissue roll. The side clamping mechanism includes a backing plate operably connected to and rotatable with an unwind shaft connected to an electric drive means, an inflatable bladder mounted on the backing plate, and means for infating the bladder such that the opposite end surfaces of the roll are sandwiched between the side clamping mechanisms.
Abstract:
A novel apparatus and method for processing high bulk tissue webs are disclosed for depositing an aqueous suspension of papermaking fibers onto an endless forming fabric to form a web, drying the web to form a dried web having a bulk of 9.0 grams per cubic centimeters or greater, winding the dried web to form a plurality of large diameter parent rolls wound on a core, and transporting the parent rolls to an unwind stand having torque transmitting clamping means for engaging opposite end surfaces of the parent rolls. A backing plate is operably connected to and rotatable with an unwind shaft connected to an electric drive. An inflatable bladder is mounted on the backing plate. The clamping means engage a first parent roll by inflating the bladder such that the opposite end surfaces of the roll are sandwiched between the side clamping mechanisms for partially unwinding the first parent roll using a variable speed drive operably associated with the clamping means. The partially unwound first parent roll is rotatably supported on a core placement table adapted to receive the partially unwound first parent roll from the clamping means. The torque transmitting clamping means engage a second parent roll, and a leading end portion of the web on the second parent roll is joined to a trailing end portion of the partially unwound first parent roll to form a joined web without glue. In one aspect, the leading end portion of the web on the second parent roll is transported with a thread-up conveyor. In one aspect, the leading end portion of the web on the second parent roll is transported with vacuum means operably associated with an endless screen belt means with decreasing amounts of vacuum as the web is transported over the endless screen belt means. The joined webs are rewound into smaller diameter rolls suitable for retail sizing.