Sleeved organic rubber pressure rolls
AssigneeXerox Corporation
InventorGeorge R. Imperial
Life of this patent
Estimating the term…
Abstract
A pressure roll for use in a roll fuser for fixing toner images to copy sheets by the application of heat and pressure, is described. The roll is characterized by a rigid core covered with a relatively thick layer of organic rubber with a relatively thinner sleeve or layer of material acting as an air barrier to the organic rubber to prevent oxidative degradation. The organic rubbers are characterized by small compression deflection decreases even after exposure to high temperatures, under pressure for prolonged periods of time.
Claims10
A deformable pressure roll for a roll fusing apparatus utilized in fixing toner images to support sheets, said pressure roll comprising:
- a rigid core;
- a resilient layer of long-life, durable non-softening organic rubber adhered to the rigid core;
- and
- an outer protective sleeve material having a high flex life over the organic rubber layer, the sleeve material providing a barrier to air so that the organic rubber is relatively free from oxidative degradation.
A fuser apparatus for fixing toner images to copy sheets, the apparatus comprising:
- a heated fuser roll structure;
- a deformable roll for pressure engagement with the fuser roll structure to form a nip through which the copy sheets pass with the toner images contacting the heated fuser roll structure;
- the pressure roll comprising:
- a rigid core;
- a resilient layer of long-life, durable, non-softening organic rubber adhered to the rigid core;
- and
- an outer protective sleeve material having a high flex life over the organic rubber layer, the sleeve material providing a barrier to air so that the organic rubber is relatively free from oxidative degradation.
A copier apparatus including structure for forming toner images on copy sheets and structure utilized in fixing the toner images to the copy sheets wherein the latter structure comprises:
- a deformable pressure roll comprising:
- a rigid core;
- a resilient layer of long-life, durable, non-softening organic rubber adhered to the rigid core;
- and
- an outer protective sleeve material having a high flex life over the organic rubber layer, the sleeve material providing a barrier to air so that the organic rubber is relatively free from oxidative degradation.
Dependencies are inferred from the claim text.