Non-magnetic single-component toner, method of preparing the...

Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C430S108700, C430S137110, C399S252000

Reexamination Certificate

active

06875550

ABSTRACT:
A non-magnetic single-component toner8of the present invention has toner mother particles8a, and external additives12comprising: two hydrophobic silicas13, 14of which particle diameters are different from each other, i.e. a mean primary particle diameter of 7 nm to 12 nm and a mean primary particle diameter of 40 nm to 50 nm, and a hydrophobic rutile/anatase type titanium oxide15having a spindle shape of which major axial diameter is in a range from 0.02 nm to 0.10 nm and the ratio of the major axial diameter to the minor axial diameter is set to be 2 to 8, wherein the external additives12adhere to the toner mother particles8a. By the hydrophobic silicas13, 14having work function smaller than the work function of the toner mother particles8a, the negative charging property is imparted to the toner mother particles8aand the fluidity is also insured. On the other hand, by mixing and using hydrophobic rutile/anatase type titanium oxide particles15having work function larger than or equal to the work function of the toner mother particles8atogether with the hydrophobic silicas13, 14, the non-magnetic single-component toner8is prevented from excessively charged. Therefore, the amount of fog toner on non-image portions is reduced, the transfer efficiency is further improved, the charging property is further stabilized, and the production of reverse transfer toner is further inhibited.

REFERENCES:
patent: 3779926 (1973-12-01), Merck et al.
patent: 5620823 (1997-04-01), Kambayashi et al.
patent: 5824442 (1998-10-01), Tanikawa et al.
patent: 5851715 (1998-12-01), Barthel et al.
patent: 6130020 (2000-10-01), Wada et al.
patent: 6348291 (2002-02-01), Sato
patent: 6379856 (2002-04-01), Sokol et al.
patent: 6555281 (2003-04-01), Nozawa et al.
patent: 6605402 (2003-08-01), Schein et al.
patent: 2000-128534 (2000-05-01), None
patent: 2000-181130 (2000-06-01), None
patent: 2001-083732 (2001-03-01), None
Patent Abstracts of Japan, Publication No. 2001083732; Mar. 30, 2001; Toshiba Tec Corp. XP-002266353, Sep. 27, 1991; Fuji Xerox Co., Ltd.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Non-magnetic single-component toner, method of preparing the... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Non-magnetic single-component toner, method of preparing the..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-magnetic single-component toner, method of preparing the... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3398089

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.