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:
Apr. 10, 2012
Filed:
Sep. 24, 2009
Toru Ishihara, Tokyo, JP;
Toru Ishihara, Tokyo, JP;
Oki Data Corporation, Tokyo, JP;
Abstract
An image forming apparatus is capable of printing a position-coding pattern. A first print engine prints a position-coding pattern and holds a first developer material therein. A plurality of second print engines each print a corresponding image in accordance with print data, the image being different from the position-coding pattern, each of the second print engines holding a corresponding second developer material therein. The first developer material is charged to a first average amount of charge and has a first distribution of amount of charge. The second developer material is charged to a second average amount of charge and has a second distribution of amount of charge, such that the first average amount of charge is larger than the second average amount of charge, and that the first distribution of amount of charge has a smaller standard deviation than the second distribution of amount of charge.