IMAGE BEARING MEMBER PROTECTING AGENT, PROTECTIVE LAYER FORMING DEVICE, AND IMAGE FORMING APPARATUS

• US 20140093294A1
• Filed: 09/27/2013
• Published: 04/03/2014
• Est. Priority Date: 10/03/2012
• Status: Active Grant

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: KOMITO, Kenji, NAKAI, Hiroshi, HASEGAWA, Kunio, SEKINE, Takuya
• Granted Patent: US 9,217,985 B2
• Time in Patent Office: Days
• US Class Current: 399/346
• CPC Class Codes: G03G 21/0094 fatigue treatment of the photoconductor

Abstract

Provided is an image bearing member protecting agent which contains a fatty acid metal salt and an inorganic lubricant, wherein an aspect ratio (average major axis length/average minor axis length) of the inorganic lubricant is 60 to 400, and a mass ratio of the fatty acid metal salt to the inorganic lubricant (fatty acid metal salt/inorganic lubricant) is 98/2 to 85/15.

Claims

1. An image bearing member protecting agent comprising:

a fatty acid metal salt; and

an inorganic lubricant,

wherein an aspect ratio (average major axis length/average minor axis length) of the inorganic lubricant is 60 to 400, and

wherein a mass ratio of the fatty acid metal salt to the inorganic lubricant (fatty acid metal salt/inorganic lubricant) is 98/2 to 85/15.

2. The image bearing member protecting agent according to claim 1, wherein the aspect ratio (average major axis length/average minor axis length) of the inorganic lubricant is 100 to 300.

3. The image bearing member protecting agent according to claim 1, wherein the mass ratio of the fatty acid metal salt to the inorganic lubricant (fatty acid metal salt/inorganic lubricant) is 95/5 to 90/10.

4. The image bearing member protecting agent according to claim 1, wherein the inorganic lubricant is boron nitride.

5. The image bearing member protecting agent according to claim 1, wherein the fatty acid metal salt is zinc stearate.

6. A protective layer forming device comprising:

an image bearing member protecting agent; and

an image bearing member protecting agent supplying member configured to supply the image bearing member protecting agent to a surface of an image bearing member,

wherein the image bearing member protecting agent comprises a fatty acid metal salt, and an inorganic lubricant,

wherein an aspect ratio (average major axis length/average minor axis length) of the inorganic lubricant is 60 to 400, and

wherein a mass ratio of the fatty acid metal salt to the inorganic lubricant (fatty acid metal salt/inorganic lubricant) is 98/2 to 85/15.

7. The protective layer forming device according to claim 6, further comprising an protective layer forming member configured to press the image bearing member protecting agent which has been supplied to the image bearing member against the surface of the image bearing member to thereby form a protective layer on the surface of the image bearing member.

8. An image forming apparatus comprising:

an image bearing member;

a latent electrostatic image forming unit configured to form a latent electrostatic image on the image bearing member;

a developing unit configured to develop the latent electrostatic image with a toner to thereby form a visible image;

a transfer unit configured to transfer the visible image onto a recording medium; and

a protective layer forming unit configured to apply an image bearing member protecting agent onto a surface of the image bearing member on which the visible image has been transferred, to thereby form a protective layer,

wherein the protective layer forming unit comprises the image bearing member protecting agent, and an image bearing member protecting agent supplying member configured to supply the image bearing member protecting agent to the surface of the image bearing member,

wherein the image bearing member protecting agent comprises a fatty acid metal salt, and an inorganic lubricant,

wherein an aspect ratio (average major axis length/average minor axis length) of the inorganic lubricant is 60 to 400, and

wherein a mass ratio of the fatty acid metal salt to the inorganic lubricant (fatty acid metal salt/inorganic lubricant) is 98/2 to 85/15.

9. The image forming apparatus according to claim 8, further comprising, at a downstream side of the transfer unit and an upstream side of the protective layer forming unit in a rotation direction of the image bearing member, a cleaning unit configured to remove a toner remaining on the surface of the image bearing member.