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.:

US 11754937 B1

Date of Patent:

Sep. 12, 2023

Filed:

Sep. 15, 2022

Roll member, charging member, charging device, process cartridge, and image forming apparatus

Applicant:

Fujifilm Business Innovation Corp., Tokyo, JP;

Inventors:

Yuki Tagawa, Kanagawa, JP;

Ryo Sekiguchi, Kanagawa, JP;

Assignee:

FUJIFILM Business Innovation Corp., Tokyo, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Ryan D Walsh

Int. Cl.

CPC ...

G03G 15/02 (2006.01); B32B 27/08 (2006.01); D01F 6/90 (2006.01); G03G 15/16 (2006.01); G03G 15/08 (2006.01);

U.S. Cl.

CPC ...

G03G 15/0233 (2013.01); B32B 27/08 (2013.01); D01F 6/90 (2013.01); G03G 15/0818 (2013.01); G03G 15/1685 (2013.01);

Abstract

A roll member includes a conductive elastic layer, and a surface layer provided on the conductive elastic layer. The surface layer contains a crosslinked product of crosslinkable nylon, the crosslinking degree of the surface layer specified by formula (1) below is 0.3 or more and 0.7 or less, and the thermal degradation index of the surface layer specified by formula (2) below is 2.1 or more and 2.3 or less.Crosslinking degree=absorbance at 1078 cm÷absorbance at 2935 cm  Formula (1):Thermal degradation index=absorbance at 1638 cm÷absorbance at 1543 cm   Formula (2):

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