IPC분류정보
국가/구분 |
United States(US) Patent
공개
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0068140
(2002-02-06)
|
공개번호 |
US-0111259
(2002-08-15)
|
발명자
/ 주소 |
- Chiang, Albert C.
- Roderick, John A.
|
출원인 / 주소 |
- Mearthane Products Corporation, Rhode Island corporation
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
0 |
초록
A conductive roller for use in a laser printer includes a solid, thermoset urethane comprising a metal salt and having a hardness of between 30 Shore A and 50 Shore A on cube and a volume resistivity of 1E6 ohm-cm and 9E8 ohm-cm.
대표청구항
▼
1. A conductive roller for use in a laser printer, the roller including a solid, thermoset urethane having a hardness of between 30 Shore A and 50 Shore A on cube and a volume resistivity of 1E6 ohm-cm and 9E8 ohm-cm. 2. The conductive roller of claim 1, wherein the thermoset urethane has a hardness
1. A conductive roller for use in a laser printer, the roller including a solid, thermoset urethane having a hardness of between 30 Shore A and 50 Shore A on cube and a volume resistivity of 1E6 ohm-cm and 9E8 ohm-cm. 2. The conductive roller of claim 1, wherein the thermoset urethane has a hardness of between 33 Shore A and 45 Shore A on cube. 3. The conductive roller of claim 1, wherein the thermoset urethane has a hardness of between 38 Shore A and 42 Shore A on roller. 4. The conductive roller of claim 1, wherein the thermoset urethane has a volume resistivity of between 3E6 ohm-cm and 8E8 ohm-cm. 5. The conductive roller of claim 1, wherein the thermoset urethane includes between 0.1% and 2% of the metal salt by weight. 6. The conductive roller of claim 1, wherein the metal salt is selected from the group consisting of iron chloride, copper chloride, lithium perchlorate, lithium chloride, lithium bromide, iron bromide, and copper bromide. 7. The conductive roller of claim 1, wherein the thermoset urethane is formed from precursors including a polyol and/or polyamine having an equivalent molecular weight of greater than 1500. 8. The conductive roller of claim 1, wherein the thermoset urethane is formed from precursors including a polyol and/or polyamine having an equivalent molecular weight of greater than 2000. 9. The conductive roller of claim 1, wherein the thermoset urethane does not include a plasticizer. 10. The conductive roller of claim 1, wherein the thermoset urethane is formed from precursors including methylene diisocyanate. 11. The conductive roller of claim 1, wherein the thermoset urethane is formed from precursors including methylene diisocyanate having an NCO of greater than 20. 12. The conductive roller of claim 1, wherein the thermoset urethane exhibit s a stable volume resistivity even when the humidity changes from 10% to 90% and the temperature changes from 10° C. to 40° C. 13. The conductive roller of claim 1, wherein the thermoset urethane further includes a UV light stabilizer. 14. The conductive roller of claim 1, wherein the thermoset urethane further includes an antioxidant. 15. The conductive roller of claim 1, wherein the thermoset urethane is formed from precursors including a polyol and/or polyamine having an equivalent molecular weight of greater than 1500 and a polyol and/or polyamine having an equivalent molecular weight of less than 110. 16. The conductive roller of claim 15, wherein the ratio of polyol and/or polyamine having an equivalent molecular weight of greater than 1500 to the polyol and/or polyamine having an equivalent molecular weight of less than 110 is at least 1:1. 17. The conductive roller of claim 16, wherein the ratio is between 1.5:1 and 4:1. 18. The conductive roller of claim 1, wherein said roller is a charge roller. 19. The conductive roller of claim 1, wherein said roller is a developer roller. 20. The conductive roller of claim 1, further comprising a rubber coat. 21. A method of preparing a roller including a conductive thermoset urethane prepared from urethane precursors including an isocyanate and a polyol and/or a polyamine, comprisingfully dissolving a metal seal in the urethane precursor, and curing the urethane precursors in a roller mold to provide a roller including a solid, thermoset urethane having a hardness of between 30 Shore A and 50 Shore A on cube and a volume resistivity of 1E6 ohm-cm and 9E8 ohm-cm, the metal salt being fully dissolved in the thermoset urethane. 22. A method of preparing a roller including a conductive, thermoset urethane prepared from urethane pr ecursors including an isocyanate, a first polyol and/or polyamine having an equivalent molecular weight of greater than 1500, and a second polyol and/or polyamine having an equivalent molecular weight of less than 110, the method comprisingsupplying three streams of liquid to a roller mold, the first stream including the isocyanate, the second stream including the first polyol and/or polyamine, and the third stream including the second polyol and/or polyamine, wherein a metal salt is included in the third stream, and curing the urethane precursors in the roller mold to provide a roller including a thermoset urethane having a hardness of between 30 Shore A and 50 Shore A on cube and a volume resistivity of 1E6 ohm-cm and 9E8 ohm-cm. 23. The method of claim 22, wherein the second polyol and/or polyamine has an equivalent molecular weight of greater than 2000. 24. The method of claim 22, wherein no plasticizer is included in the thermoset urethane. 25. The method of claim 22, wherein the isocyanate include methylene diisocyanate. 26. The method of claim 25, wherein the methylene diisocyanate has an NCO of greater than 20. 27. A laser printer including a photoconductor drum and a developer roller that transfers toner to the photoconductor drum during printing, wherein the developer roller includes a solid, thermoset urethane including a metal salt and having a hardness of between 30 Shore A and 50 Shore A on cube and a volume resistivity of 1E6 ohm-cm and 9E8 ohm-cm. 28. A laser printer including a photoconductor drum and a charge roller that charges the photoconductor drum, wherein the charge roller includes a solid, thermoset urethane including a metal salt and having a hardness of between 30 Shore A and 50 Shore A on cube and a volume resistivity of 1E6 ohm-cm and 9E8 ohm-cm.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.