Web cinching and winding apparatus and method
AssigneeEastman Kodak Company
InventorsMaurice A. Kildal, Stephen J. Hassall
Life of this patent
Estimating the term…
Abstract
To cinch a web end portion onto a core, the core is center driven by a core driving mechanism at an outer peripheral speed in excess of the speed at which the web end portion is fed to and threaded around the core. After the web end portion is cinched onto the core and the web wound to form a roll of predetermined diameter, the core drive mechanism is disengaged from the core to terminate the core center drive. The outer surface of the roll further substantially simultaneously engages a roll surface drive mechanism which is normally spaced from the core for surface driving the roll.
Claims15
Apparatus for automatically cinching the end portion of a web onto a cylindrical core and winding convolutions of web on the core to form a roll comprising:
- means for transporting a web to said core at one speed;
- means for guiding the end portion of the transported web around the outer periphery of said core;
- core driving means adapted to be (1) drivingly engaged with said core in a first mode of operation for rotatably driving said core at an outer peripheral speed in excess of said one speed for automatically cinching the transported web end portion onto said core and winding convolutions of web onto the core to form a roll having a roll surface, and (2) drivingly disengaged from said core in a second mode of operation;
- roll surface driving means adapted to be drivingly engaged with the roll surface in a first operating condition, and drivingly disengaged from the roll surface in a second operating condition, said roll surface driving means being in its second operating condition when said core driving means is in its first mode of operation;
- and
- means responsive to a predetermined roll surface diameter as web is wound on the roll for substantially simultaneously placing said core driving means in its second mode of operation and said roll surface driving means in its first operating condition.
Apparatus for automatically cinching the end portion of a web onto a cylindrical core and winding convolutions of web on the core to form a roll comprising:
- means for transporting a web to said core at one speed;
- means for guiding the end portion of the transported web around the periphery of said core;
- core driving means having (1) a core driving mode of operation for rotatably driving said core at an outer peripheral speed in excess of said one speed for automatically cinching the transported web end portion onto said core and winding web convolutions thereon to form a roll having a surface of increasing diameter, and (2) a core non-driving mode of operation in which said core driving means is out of driving engagement with said core;
- roll surface driving means normally spaced a clearance distance from the outer surface of the core for drivingly engaging the roll surface after the web end portion has been cinched and the web convolutions on the core have built up the roll to a predetermined roll surface diameter;
- and
- means for substantially simultaneously placing said core driving means in its core non-driving mode of operation when said built-up roll reaches said predetermined roll surface diameter.
A method for automatically cinching the end portion of a web onto a cylindrical core and winding convolutions of web on the core to form a roll comprising the steps of:
- transporting a web to said core at one speed;
- guiding the end portion of the transported web around the outer periphery of the core;
- rotatably driving the core by means of a first surface on a builder roller at an outer peripheral speed in excess of said one speed for automatically cinching the transported web end portion onto the core and then winding a plurality of convolutions of web onto the core to form a roll having a roll surface;
- and
- substantially simultaneously discontinuing driving the core by disengaging the first surface of the builder roller from the core, and effecting roll surface driving by increasing the diameter of the roll until the roll surface and a second surface of the builder roller are in surface driving engagement.
Dependencies are inferred from the claim text.