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:
Dec. 03, 1991
Filed:
Mar. 16, 1990
Hitachi, Ltd., Tokyo, JP;
Abstract
Both a test printing pattern during a forth direction printing and a test printing pattern during a back direction printing are displayed on a screen of a display apparatus. The test printing pattern is occurred at a predetermined detection position by counting a value of an up/down counter. A printing position drift between the forth direction printing and the back direction printing is shown on the screen. The optimum printing position drift having the smallest printing position drift amount is detected on the screen by the test printing patterns. A corrected result of the printing position drift is printed. A correction value of the printing position drift is renewed at an optimum value. The printing position drift in such as ruled lines is set at the minimum value. A high quality printing for a document data can be maintained and a high throughput for the document data can be obtained.