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Toner for electrophotography and manufacturing method thereof
   
Document Number
US Patent 6632579
Issued Date
October 14, 2003
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Abstract
A toner for electrophotography comprises a resin, a colorant and a charge controlling agent, wherein the charge controlling agent is substantially present on a surface part of the toner, and wherein the toner has a saturated charge quantity (absolute value) of from about 10-40 .mu.C/g when the toner is mixed with a carrier which is coated with a silicone resin, and a carrier contamination degree not greater then about 20%.
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Toner for electrophotography and manufacturing method thereof - US Patent 6632579 Drawing
Drawing from US Patent 6632579
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Number of Claims:
8
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Published
October 14, 2003
Application Number
09/523,700
Filed
March 13, 2000
US Classification
430/137.11   430/110.2 430/137.18
Int'l Classification
G03G   9/08   (20060101)   G03G   9/113   (20060101)  
Examiner
Parent Case
This application is a Divisional of application U.S. Ser. No. 09/168,433 filed on Oct. 7, 1998, issued as U.S. Pat. No. 6,140,000.
Priority Data
Oct 07, 1997 [JP] 09-274542 Oct 07, 1998 [JP] 10-284649
USPTO Field of Search
430/137   430/110   430/111   430/137.1   430/137.11   430/110.2   430/110.3   430/137.18  
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