Pre-aging of rollers, gaskets, or o-rings to improve material response to compression set and compression stress relaxation

• US 8,296,950 B2
• Filed: 12/08/2005
• Issued: 10/30/2012
• Est. Priority Date: 12/08/2005
• Status: Active Grant

• Current Assignee: Codonics Incorporated
• Original Assignee: Codonics Incorporated
• Inventors: Colbrunn, Robb, Turk, Scott, Tainer, Christopher, Botten, Pete, Lehuta, Eric, Srnka, Lawrence
• Primary Examiner(s): Omgba, Essama
• Application Number:
  US11/297,847
• Publication Number:
  US 20070134044A1
• Time in Patent Office: 2,518 Days
• Field of Search: 528/502.C, 528/502.R, 264/570, 264/907, 264/900, 521/918, 298/95, 298/951, 298/953, 298/953.3
• US Class Current: 29/895.33
• CPC Class Codes: B41J 11/04 Roller platens
• CPC Class Codes: Y10T 29/49544 Roller making
• CPC Class Codes: Y10T 29/49565 One-piece roller making

Abstract

Provided is a method of stabilizing an elastomeric property of an elastomeric material. The method includes placing the elastomeric material in a pressurizing chamber and applying a suitable hydrostatic pressure to the elastomeric material within the pressurizing chamber to at least partially compress the elastomeric material. Application of the hydrostatic pressure is maintained for a period of time suitable to at least partially stabilize a restorative force exhibited by the elastomeric material in response to subsequent exposures of the elastomeric material to a compressive force.

Claims

1. A method of stabilizing an elastomeric property of an elastomeric material, comprising:

placing the elastomeric material in a pressurizing chamber;

applying a hydrostatic pressure to the elastomeric material within the pressurizing chamber to at least partially compress the elastomeric material, wherein the hydrostatic pressure applied to the elastomeric material within the pressurizing chamber is less than a pressure required to deflect the elastomeric material beyond an elongation limit of the elastomeric material; and

maintaining application of the hydrostatic pressure for a period of time to at least partially stabilize a restorative force exhibited by the elastomeric material in response to subsequent exposures of the elastomeric material to a compressive force, wherein the hydrostatic pressure pre-compresses the elastomeric material to advance the elastomeric material to a condition where the restorative force of the elastomeric material is more stable.

2. The method of claim 1, wherein a gas is utilized to apply the hydrostatic pressure to the elastomeric material.

3. The method of claim 2, wherein the gas is compressed air.

4. The method of claim 2, wherein the gas is compressed nitrogen.

5. The method of claim 2, wherein the gas is applied at 90 pounds per square inch.

6. The method of claim 5, wherein the gas is applied for 12 hours.

7. The method of claim 2, wherein the gas is applied at 200 pounds per square inch for 5 hours.

8. The method of claim 1, wherein a liquid is utilized in the pressurizing chamber to apply the hydrostatic pressure to the elastomeric material.

9. The method of claim 8, wherein the liquid is one of a group of liquids, the group of liquids consisting of a vegetable oil, a glycerol, and an isopropyl alcohol.

10. The method of claim 8, wherein the liquid is water.

11. The method of claim 1, wherein the elastomeric property comprises a compression set value of the elastomeric material, and the compression set value is at least partially stabilized when a rate of degradation of the compression set value slows relative to an initial rate of degradation.

12. The method of claim 1, wherein the elastomeric material is in a generally-cylindrical shape when the hydrostatic pressure is applied to the elastomeric material.

13. The method of claim 12, wherein the elastomeric material in the generally cylindrical shape is to be used as a roller in a computer output device after the elastomeric property is at least partially stabilized.

14. A method of stabilizing an elastomeric property of an elastomeric material, comprising:

placing the elastomeric material in a pressurizing chamber; and

applying hydrostatic pressure to the elastomeric material within the pressurizing chamber for a period of time to at least partially stabilize the elastomeric property of the elastomeric material, wherein the hydrostatic pressure applied to the elastomeric material within the pressurizing chamber is less than a pressure required to deflect the elastomeric material beyond an elongation limit of the elastomeric material, and the elastomeric property comprises a compression-set-relaxation value of the elastomeric material, and the compression-set-relaxation value is at least partially stabilized when a rate of degradation of the compression-set-relaxation value slows relative to an initial rate of degradation, wherein the hydrostatic pressure pre-compresses the elastomeric material to a condition where the compression-set-relaxation value of the elastomeric material is more stable.