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:
Jun. 23, 1998
Filed:
Dec. 22, 1994
Osamu Mukudai, Tsukuba Laboratory, 45, Miyukigaoka, Tsukuba-shi, Ibaraki, JP;
Yuji Matsuura, Tsukuba Laboratory, 45, Miyukigaoka, Tsukuba-shi, Ibaraki, JP;
Hiroyoshi Yamaga, Tsukuba Laboratory, 45, Miyukigaoka, Tsukuba-shi, Ibaraki, JP;
Other;
Abstract
A friction charge-providing member for positively-chargeable toner is disclosed, which comprises a parent material having provided at least on the surface thereon a compound represented by formula (I) as a charge-controlling agent: ##STR1## wherein A and A' may be the same or different and each independently represents a hydrogen atom, a halogen atom, a nitro group, an alkyl group having 1 to 18 carbon atoms which may contain a substituent(s), an alkenyl group, an acyl group, a sulfonic acid group, a sulfamoyl group, a N-substituted sulfamoyl group, an alkylsulfonyl group having 1 to 5 carbon atoms, a carboxyl group, an alkylester group having 1 to 5 carbon atoms, a hydroxyl group, an alkoxyl group having 1 to 18 carbon atoms, an amino group, and a N-substituted amino group; B and B' may be the same or different and each independently represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 18 carbon atoms which may contain a substituent(s), an alkenyl group, an amino group, a N-substituted amino group, an acyl group, a benzoylamino group which may contain a substituent(s), a sulfamoyl group, an alkylester group having 1 to 5 carbon atoms, a hydroxyl group, an alkoxyl group having 1 to 18 carbon atoms and a N-substituted carbamoyl group; X, X' Y and Y' may be the same or different and each independently presents --O--, --COO--, --NH-- and --S-- and is present at ortho-position of an azo group; n, n', m and m' may be the same or different and each independently represents an integer of 1 to 4; Z represents a hydrogen atom, sodium, potassium, ammonium, aliphatic ammonium, alicyclic ammonium and heterocyclic ammonium; M represents chromium, cobalt and iron.