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:
Feb. 12, 2013
Filed:
Mar. 03, 2009
Kumiko Hatakeyama, Kanagawa-ken, JP;
Toshiyuki Kabata, Kanagawa-ken, JP;
Kumiko Hatakeyama, Kanagawa-ken, JP;
Toshiyuki Kabata, Kanagawa-ken, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus, including an image bearer; and a protectant applicator applying a protectant including zinc stearate and zinc palmitate to the surface thereof, wherein an average amount of the protectant adhering thereto is from 0.4 to 2.0 μg/cmafter 500 images are produced, and wherein the following relationships are satisfied:wherein X represents an index of the amount of the protectant adhering at an arbitrary point thereon; Sa represents a peak area in a wavenumber domain of from 1,765 to 1,786 cmin an infrared absorption spectrum; and Sb represents a peak area in a wavenumber domain of from 1,533 to 1,547 cm, andΔave<wherein Xi represent the indices X at n-pieces of the arbitrary points in an image forming area thereof along its longitudinal direction; Xave represents an average of the n-pieces of Xi; and ΔXi represents a variation of Xi.