Multiple durometer pressure roller
AssigneeEastman Kodak Company
InventorsDaniel R. May, Kevin A. Cole, Sharon A. Guzman, Scott W. Tang
Life of this patent
Estimating the term…
Abstract
A multiple durometer pressure roller for winding a web of deformable material onto a core, particularly for reducing air entrainment in the wound roll. The pressure roller includes a rigid cylindrical shaft, a resilient central sleeve supported by the shaft, and two end sleeves supported at each end of the resilient sleeve. The end sleeves have a lower durometer than the resilient sleeve. In a preferred embodiment, the end sleeves and the resilient sleeve are covered by an outer cover having a higher durometer.
Claims11
An apparatus for winding a web of deformable material comprising a core forming a nip with a pressure roller wherein the web passes through the nip as it is wound onto the core, the pressure roller including:
- a rigid cylindrical shaft having a first and second end;
- a central resilient sleeve having two ends and coaxially supported on the rigid shaft, the resilient sleeve having a cylindrical surface;
- a first end sleeve coaxially supported on the first end of the rigid shaft, the first end sleeve being contiguous with one end of the resilient sleeve and having a diameter substantially equal to that of the cylindrical surface;
- and
- a second end sleeve coaxially supported on the second end of the rigid shaft, the second end sleeve being contiguous with the other end of the resilient sleeve and having a diameter substantially equal to that of the cylindrical surface wherein the first and second end sleeves have a durometer less than a durometer of the resilient sleeve.
An apparatus for winding a web of deformable material having a widthwise thickness variation, the apparatus comprising a core forming a nip with a pressure roller wherein the web passes through the nip as it is wound onto the core, the pressure roller including:
- a rigid cylindrical shaft having a first and second end;
- a central resilient sleeve having two ends and coaxially supported on the rigid shaft, the resilient sleeve having a cylindrical surface;
- a first end sleeve coaxially supported on the first end of the rigid shaft, the first end sleeve being contiguous with one end of the resilient sleeve and having a diameter substantially equal to that of the cylindrical surface;
- and
- a second end sleeve coaxially supported on the second end of the rigid shaft, the second end sleeve being contiguous with the other end of the resilient sleeve and having a diameter substantially equal to that of the cylindrical surface wherein the first and second end sleeves have a durometer less than a durometer of the resilient sleeve.
Dependencies are inferred from the claim text.