Source: http://www.google.com/patents/US5968698?ie=ISO-8859-1
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Patent US5968698 - Image forming method in an image forming apparatus utilizing an ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsIn an image forming method in which an electrostatic latent image is formed on a rotating image carrier, the electrostatic latent image is developed by toner particles, to form a toner image on the surface of the image carrier, the toner image is transferred to a recording medium, and toner particles...http://www.google.com/patents/US5968698?utm_source=gb-gplus-sharePatent US5968698 - Image forming method in an image forming apparatus utilizing an electrophotographic systemAdvanced Patent SearchPublication numberUS5968698 APublication typeGrantApplication numberUS 08/637,257Publication dateOct 19, 1999Filing dateApr 24, 1996Priority dateApr 25, 1995Fee statusPaidPublication number08637257, 637257, US 5968698 A, US 5968698A, US-A-5968698, US5968698 A, US5968698AInventorsMitsunobu HondaOriginal AssigneeMinolta Co., LtdExport CitationBiBTeX, EndNote, RefManPatent Citations (8), Referenced by (7), Classifications (12), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetImage forming method in an image forming apparatus utilizing an electrophotographic system
US 5968698 AAbstract
In an image forming method in which an electrostatic latent image is formed on a rotating image carrier, the electrostatic latent image is developed by toner particles, to form a toner image on the surface of the image carrier, the toner image is transferred to a recording medium, and toner particles or the like remaining on the surface of the image carrier are removed by a cleaning blade, inorganic fine particles having a BET specific surface area from 30 to 300 m2 /g stay in a portion on the upstream side of a portion where the cleaning blade is in contact with the surface of the image carrier in the direction of rotation of the image carrier, and the length of the portion where the inorganic fine particles stay on the upstream side of the contact portion in the direction of rotation of the image carrier is in the range of 5 to 50 μm.
1. In an image forming method in which an electrostatic latent image is formed on a rotating image carrier, the electrostatic latent image is developed by toner particles, to form a toner image on the surface of the image carrier, the toner image is transferred to a recording medium, and toner particles remaining on the surface of the image carrier are removed by a cleaning blade, whereininorganic fine particles having a BET specific surface area from 30 to 300 m2 /g stay in a portion on the upstream side of a portion where the cleaning blade is in contact with the surface of the image carrier in the direction of rotation of the image carrier, and the length of the portion where said inorganic fine particles stay on the upstream side of said contact portion in the direction of rotation of the image carrier is in the range of 5 to 50 μm. 2. The image forming method according to claim 1, wherein the distance between the contact portion and the portion where the inorganic fine particles stay is in the range of 15 to 30 μm.
3. The image forming method according to claim 1, wherein the residual toner particles stay from the contact point to the portion where the inorganic fine particles stay, and the distance between the contact portion and the portion where the inorganic fine particles stay is in the range of 10 to 100 μm.
4. The image forming method according to claim 1, wherein the inorganic fine particles comprise a first group having a BET specific surface area from 30 to 80 m2 /g and a second group having a BET specific surface area from 80 to 300 m2 /g.
5. The image forming method according to claim 4, wherein the inorganic fine particles comprise a first group having a BET specific surface area from 30 to 60 m2 /g and a second group having a BET specific surface area from 100 to 300 m2 /g.
6. The image forming method according to claim 1, wherein the toner particles comprise colored resin fine particles and inorganic fine particles having a BET specific surface area from 30 to 300 m2 /g and adhering on the surface of the colored resin fine particles.
7. The image forming method according to claim 6, wherein the toner particles further comprise resin fine particles adhering on the surface of the colored resin fine particles.
8. The image forming method according to claim 7, wherein the amount of the inorganic fine particles adhering on the surface of the colored resin fine particles is in the range of 0.05 to 3.0 weight %, and the inorganic fine particles are treated by a hydrophobic group.
9. The image forming method according to claim 8, wherein the colored resin fine particles comprise binder resin, a colorant dispersed in the binder resin, a first anti-offset material, and a second anti-offset material having a different softening temperature from that of the first anti-offset material, and the toner particles have a volume-mean particle size from 4 to 9 μm.
10. The image forming method according to claim 9, wherein the binder resin has a softening temperature from 80 to 140� C., the first anti-offset material has a softening temperature from 60 to 110� C., and the second anti-offset material has a softening temperature from 110 to 150� C.
11. The image forming method according to claim 8, wherein the colored resin fine particles h