Abstract:
In steady control, a shaft control unit (922) adjusts rotation speed of a first support shaft (31) to cause a first roll (R1) to have peripheral speed equal to predetermined conveyance speed by maintaining a sheet storage amount in a storage mechanism (5) in a first storage amount as a reference. In storage amount adjustment control, the shaft control unit (922) accelerates the rotation speed of the first support shaft (31) to increase the peripheral speed of the first roll (R1) higher than the conveyance speed, until the sheet storage amount in the storage mechanism (5) reaches a predetermined second storage amount that is larger than the first storage amount. A calculation unit (911) calculates an outer diameter of the first roll (R1) based on the conveyance speed when the steady control is performed, and calculates the outer diameter of the first roll (R1) based on the sheet thickness calculated from a decrease amount of the outer diameter of the first roll (R1) in the steady control when the storage amount adjustment control is performed.
Abstract:
The invention concerns a splicing facility for splicing material webs. The splicing facility comprises a first dispensing device for dispensing a finite first material web from a first material web roll, a second dispensing device for dispensing a finite second material web from a second material web roll, a third dispensing device for dispensing a third material web, a first splicing device for splicing together the finite first material web and the finite second material web to an endless material web and a second splicing device for splicing together the third material web and the finite first material web or the finite second material web to the endless material web. The first splicing device and the second splicing device are arranged at different heights.
Abstract:
A web unwind stand for obtaining, loading, splicing, and unwinding convolutely wound rolls of web material and forwarding the web material unwound from each of the convolutely wound rolls uninterruptedly to a downstream apparatus is disclosed. The unwind stand comprises splicing means, a first positionable roll grasping apparatus for obtaining and disposing a first of the convolutely wound rolls proximate to, and relative to, the splicing means, and, second positionable roll grasping apparatus for obtaining and disposing a second of the convolutely wound rolls proximate to, and relative to, the splicing means.
Abstract:
Methods and systems for preventing wrinkles in a web passing through an accumulator. The accumulator comprises a plurality of rollers including at least one roller having an axis of revolution movable toward and away from the axis of revolution of another roller to release and store varying amounts of the web. At least one of the rollers has a nominally flat outer surface and at least one of the rollers has a profiled outer surface.
Abstract:
The method involves preparing an end of a new band of a new bobbin (6), and fitting a gluing joint on a connection assembly (4). Another gluing joint to be transferred is mounted on the connection assembly corresponding to a bobbin (8) unrolling a completed band. The bobbin (8) is stopped, and a junction is formed by gluing the new band with a section of the completed band using connections of the connection assembly. The unrolling of the new bobbin is started. An independent claim is also included for an end-to-end cutting and gluing device for an unrolling machine.
Abstract:
The unwinder device comprises: unwinding members for simultaneously unwinding a first reel (B1) and a second reel (B2), a splicing device (151) for splicing together a first web-like material (N1) coming from said first reel (B1) and a second web-like material (N2) coming from said second reel (B2), an accumulator member (24, 200) for accumulating web-like material (N2) supplied from said second reel (B2) before splicing to the web-like material (N1) supplied from said first reel (B1).
Abstract:
A unit (1) for feeding strips (2, 3) has pins (12) supporting a first and a second reel (6, 7) of a first and a second strip (2, 3) respectively; the second reel (7) having an end (53; 56) of the second strip (3) extending at the cylindrical outer surface (52) of the second reel (7); the unit having a tool (18) having a plate (40) for joining the first and the second strip (2, 3), and a movable arm (20) having a gripping head (25; 55) for gripping the end (53; 56) along the cylindrical outer surface (52); and the gripping head (25; 55) having a first gripping face (30; 60) for gripping the first and the second strip (2, 3) between the plate (40) of the tool (18) and the first gripping face (30; 60).
Abstract:
A single face splicer for creating a splice between a running web from a first source of single face material and a ready web from a second source of single face material to provide an uninterrupted supply of single face material to a double backer system in the manufacture of corrugated cardboard. The splicer includes an upper and lower bridge positioned above the first and second sources of single face material, and a splice head adjacent the upper bridge for creating the splice between the running web and the ready web. A drive system draws the running web through the splice head at an output speed which is greater than the speed at which the double backer system draws the running web from the splicer. The running web is deposited on an upper bridge supply belt which rotates at a speed which is slower than the output speed thereby causing the running web to accumulate on the upper bridge supply belt. As the splice is made, the double backer system draws from the accumulated storage on the upper bridge supply belt. To allow for pre-acceleration of the first and second supplies of single face material, the running or ready webs is deposited onto a first or second lower bridge supply belt which is rotating at a speed which is slower than the output speed of the first or second supply. An accumulation of running or ready web is created on the first or second lower bridge supply belt which allows for pre-acceleration of the first or second supply prior to the initiation of a splice.
Abstract:
The present invention features a web feeding and transition system for exchanging a first, used, web roll for a second, fresh, web roll, so that web material is conveyed along a web-conveying feed path. Each web of the first and second web rolls includes a backing or a separate, interleaved web. The web assembly has a first work station having a mounting for allowing the first web roll to unwind and feed the first web to the feed path. A second work station has a mounting adjacent the first mounting for allowing the second web roll to unwind so that the second web may be spliced to the first web. A "bump splicing" vacuum roll disposed upon the first work station causes an adhesive section of the fresh web to contact an end portion of the exhausting web, as the web roll runs out.
Abstract:
A system and method for controlling the speed and tension of a web being unwound from a rotating roll and being run through an inertia-compensated festoon and then to a web-using production process which requires the web to run at a preselected relatively high speed and a preselected relatively low tension. Based on sensing the amount of web stored in the festoon, a brake applies a decreasing braking-force to the running roll as the diameter of the roll decreases. When the roll has decreased to an intermediate diameter, where the decreasing tension torque is inadequate to continue to accelerate the roll, a motor engages the roll and adds assisting web-unwinding torque to the roll as the diameter of the roll continues to decrease. The brake is also used to brake the roll to a stop before a subsequent zero-speed web-splice. The motor is also used to rotate the roll to line speed after splicing.