The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 14, 2000
Filed:
Feb. 20, 1998
Toshiya Natsuhara, Takarazuka, JP;
Yasuhiro Ohno, Amagasaki, JP;
Hideo Hotomi, Nishinomiya, JP;
Masakazu Takahashi, Sanda, JP;
Minolta Co., Ltd., Osaka, JP;
Abstract
The present invention provides an ink jet printer which performs recording by causing a nozzle to discharge an ink drop onto a recording medium. The nozzle is connected to an ink channel in which aqueous ink is housed. The printer head can vary the dot size on the recording medium by changing the size of the drop that is discharged from the nozzle. The aqueous ink has a degree of surface tension change .DELTA.S that is expressed by the relation .DELTA.S=(S.sub.1 -S.sub.3)/ S.sub.2 of 0.3 or less, wherein S.sub.2 is the surface tension at 25.degree. C., and has a value of 20 to 50 dynes/cm, S.sub.1 is the surface tension at 5.degree. C., and S.sub.3 is the surface tension at 40.degree. C.