(12) United States Patent ao) Patent No.: us 6,338,545 Bi
Sekiya (45) Date of Patent: Jan. 15,2002
(54) LIQUID JET RECORDING APPARATUS USING A FINE PARTICLE DISPERSION RECORDING COMPOSITION
(75) Inventor: Takuro Sekiya, Kanagawa (JP)
(73) Assignee: Ricoh Company, Ltd., Tokyo (JP)
( * ) Notice: Subject to any disclaimer, the term ol this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.
(21) Appl. No.: 09/360,996
(22) Filed: Jul. 8, 1999
(30) Foreign Application Priority Data
Jul. 21, 1998 (JP) 10-205195
Nov. 18, 1998 (JP) 10-327734
Apr. 12, 1999 (JP) 11-104494
(51) Int. C I. B41J 2/14
(52) U.S. CI 347/47; 347/45; 347/100
(58) Field of Search 347/47, 45, 100,
347/96
In an apparatus producing a high-quality and high-resolution image having high water and light resistances with an orifice having a diameter less than <|)25 fim (less than 500 fim2 in terms ol cross-sectional area ol the orifice) by use ol a fine particle dispersion recording composition, nozzle clogging can be prevented. Arecording is accomplished by a liquid jet recording apparatus for ejecting a recording composition including dispersed fine particles from a small orifice toward a receiving medium, wherein a size D^, ol the fine particles and a diameter D0 ol the small orifice are determined by a relationship 0.001 ^DpfDa^0.01.
25 Claims, 11 Drawing Sheets
