US 2004/0061875 A1 · Image printing apparatus and a white line compensation method therefor

Abstract

An image printing apparatus including at least one pair of feeding rollers disposed in pairs in a vertical direction at a predetermined interval to feed a sheet of recording paper picked up by a pickup roller along a sheet feeding path; a document position sensor to detect whether the sheet of paper picked up by the pickup roller reaches a set reference position; a storage unit to store an information about the position of the sheet of paper at which a white line would be produced where the storage unit stores the information by sheet size; a printing part to print an image as the sheet is fed into a printing area; and a control unit to control a feeding rate of the feeding rollers using the information stored in the storage unit regarding the white line producing position of the sheet of paper where the sheet of paper is fed at an initially set feeding rate starting from the time when the sheet of paper is detected to have reached at the reference position by the document position sensor until the time when the white line would be produced, and the sheet of paper is fed at a different feeding rate from the initially set feeding rate starting form the time when the white line would be produced on the sheet. Accordingly, the producing of white line is prevented, and printing quality improves.

Claims19

Dependent claims

An image printing apparatus, comprising:

at least one pair of feeding rollers disposed in pairs in a vertical direction at a predetermined interval to feed a sheet of recording paper picked up by a pickup roller along a sheet feeding path;
a document position sensor to detect whether the sheet picked up by the pickup roller reaches a set reference position;
a storage unit to store information about the position of the sheet at which a white line would be produced, wherein the storage unit stores the information regarding sheet size;
a printing part to print an image as the sheet is fed into a printing area;
and
a control unit to control a feeding rate of the feeding rollers using the information stored in the storage unit about the white line producing position of the sheet, wherein the sheet is fed at an initially set feeding rate starting when the sheet is detected to have reached the set reference position by the document position sensor until the white line would be produced, and the sheet is fed at a different feeding rate from the initially set feeding rate starting from the time when the white line would be produced on the sheet.

3 more elements

Dependencies are inferred from the claim text.

Image printing apparatus and a white line compensation method therefor

Life of this patent

Image printing apparatus and a white line compensation method therefor

Life of this patent

Abstract

Claims19