Protective agent block, method of manufacturing the same, process cartridge, and image forming apparatus

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United States of America Patent

PATENT NO 8948677
APP PUB NO 20120308260A1
SERIAL NO

13489629

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Abstract

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A protective agent block including metal soap; and boron nitride, wherein the weight ratio Mr of boron nitride to the metal soap is calculated from the relationship 1 based on Raman spectrum measured at each of multiple places on the protective agent block and the average of the measured weight ratios Mr ranges from 0.050 to 0.330 with a variation coefficient of 0.075 or less:

description='In-line Formulae' end='lead'Mr=(log(ABN/ASP)+1.3588)/7.7374  Relationship 1description='In-line Formulae' end='tail'

    where ABN represents a peak area in a range of from a wavenumber of 1377.837 cm−1 to 1354.695 cm−1 and ASP represents a peak area in a range of from a wavenumber of 1481.012 cm−1 to 1420.264 cm−1.

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Patent Owner(s)

Patent OwnerAddress
RICOH COMPANY LTD3-6 NAKAMAGOME 1-CHOME OHTA-KU TOKYO 143-8555

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kabata, Toshiyuki Kanagawa, JP 83 1165
Shionoiri, Momoko Kanagawa, JP 15 45

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