Rewinder apparatus and method
AssigneeC.G. Bretting Mfg. Co., Inc.
InventorTad T. Butterworth
Life of this patent
Estimating the term…
Abstract
A rewinder having a first winding roll that transports and supports the web, at least one core support plate that is curved for receiving and guiding cores adjacent the first winding roll, and a web separator adjacent the first winding roll and movable into pressing relationship with the web at a velocity at least equal to that of the web. The rewinder of exemplary embodiments winds a web of material a nip defined by the first winding roll, a second winding roll and a rider roll. The web separator of exemplary embodiments comprises a rotatable plurality of fingers that rotates about a common shaft. Because the web separator contacts the web moving at a velocity at least equal to that of the web, the web is effectively separated upstream of the web separator, between the core and the web separator.
Claims64
A method of winding a web onto a core in a rewinder, the rewinder winding a web of material adjacent at least one of a first winding roll, a second winding roll and a rider roll, at least two of the first, second, and rider rolls defining a winding nip in the rewinder, the method comprising:
- moving the core onto at least one core support plate and toward the web running into the winding nip;
- moving a web separation bar toward the web at a velocity at least equal to that of a portion of the web adjacent the first winding roll;
- accelerating the web separation bar to a velocity at least 125% of that of the web;
- pressing the web between the web separation bar and a surface on an opposite side of the web;
- separating the web into a leading edge and a trailing edge;
- moving the web separation bar away from the web;
- and
- winding the leading edge around the core.
A method of winding a web onto a core in a web rewinder, including a winding nip defined at least partially by a first winding roll, the method comprising:
- passing the web over a surface of the first winding roll;
- moving the core adjacent the web along at least one core support plate adjacent the first winding roll;
- moving a web separator toward the web at a velocity at least equal to that of a portion of the web adjacent the first winding roll;
- accelerating the web separator to a velocity at least 125% of that of the web;
- pressing the web between the web separator and the first winding roll;
- and
- separating the web.
An apparatus capable of winding a web onto a core in a winding nip, the apparatus comprising:
- a first winding roll at least partially defining the winding nip, the web running adjacent the first winding roll;
- a core support plate on which the core is received and moved toward the winding nip;
- and
- a web separation bar adjacent the first winding roll, the web separation bar movable in a non-transverse direction to the web into contact with the web at a velocity at least equal to that of the web, wherein the web separation bar is movable into and out of pressing relationship with the web via the use of a conveying belt.
A rewinding apparatus for winding a web, comprising:
- a first winding surface that transports and supports the web;
- a core support surface on which cores are guided adjacent the first winding surface toward the web;
- and
- a web separator adjacent the first winding surface and movable into and out of pressing relationship with the web at a velocity at least equal to that of the web, wherein the web separator is movable to contact the web via a linear actuator.
Dependencies are inferred from the claim text.