US 2011/0211896 A1 · PRINTING APPARATUS

Abstract

An apparatus may include a print head, multiple roller pairs to convey a sheet, a direct sensor, and a control unit. The print head prints on a conveyed sheet. The multiple roller pairs nip the sheet at an upstream side of the print head to convey the sheet, nip the sheet at a downstream side of the print head, and nip the sheet at an upstream side of a first roller pair to convey the sheet. The direct sensor measures a surface of the conveyed sheet at a measurement position between a nip position of the first roller pair and a nip position of a third roller pair to obtain information relating to a movement state of the sheet. The control unit controls to correct at least one of driving control of the print head and conveying control of the sheet, based on the information obtained by the direct sensor.

Claims16

Dependent claims

An apparatus comprising:

a print head configured to print on a conveyed sheet;
a first roller pair configured to nip the sheet at an upstream side of the print head to convey the sheet;
a second roller pair configured to nip the sheet at a downstream side of the print head to convey the sheet;
a third roller pair configured to nip the sheet at an upstream side of the first roller pair to convey the sheet;
a direct sensor configured to measure a surface of the conveyed sheet at a measurement position between a nip position of the first roller pair and a nip position of the third roller pair so as to obtain information relating to a movement state of the sheet;
and
a control unit configured to control to correct at least one of driving control of the print head and conveying control of the sheet, based on the information obtained by the direct sensor.

4 more elements

Dependencies are inferred from the claim text.

Printing apparatus

Life of this patent

Printing apparatus

Life of this patent

Abstract

Claims16