Recording apparatus featuring recording elements disposed in a line wherein the line is slanted relative to a subscanning direction and a method of using same
AssigneeCanon Kabushiki Kaisha
InventorFumio Mikami
Life of this patent
Estimating the term…
Abstract
A copying machine in which an image scanner reciprocates along a main-scanning direction to read an original image, and a recording head of a printer also reciprocates along the main-scanning direction to record an image. To avoid slanting the recorded image by the reciprocating motion of the recording head, and to achieve high-speed printing, nozzles of the recording head are aligned in a line slanted with respect to a subscanning direction. Thus, image data read by the image scanner is real-time converted to a recording signal and supplied as a nozzle driving signal to the recording head.
Claims21
A recording apparatus using an image scanner including a plurality of reading elements and a recording head including a plurality of recording elements which are disposed in a line wherein the line is slanted at a predetermined angle with respect to a subscanning direction of the recording head, said recording apparatus comprising:
- reading means for reciprocating the image scanner along a main-scanning direction and driving the image scanner to read an image when forward-scanning and when reverse-scanning;
- signal generating means for generating a recording signal for the recording elements based on image data read by said reading means;
- recording head moving means for reciprocating the recording head along the main-scanning direction so that forward/reverse of a moving direction of the recording head substantially corresponds to that of the image scanner;
- and
- driving means for driving the recording elements of the recording head being moved by said recording head moving means in accordance with the recording signal generated by said signal generating means, said driving means including driving order reverse means for reversing a driving order of the recording elements of the recording head, and means for, when a scanning direction of the recording head is changed from a forward direction to a reverse direction or vice versa, activating said driving order reverse means.
A recording method using a recording apparatus having an image scanner including a plurality of reading elements and a recording head including a plurality of recording elements, which are disposed in a line, wherein the line is slanted at a predetermined angle with respect to a subscanning direction of the recording head, said recording method comprising the steps of:
- a reading step of reciprocating the image scanner along a main-scanning direction and driving the image scanner to read an image when forward-scanning and when reverse-scanning;
- a signal generating step of generating a recording signal for the recording elements based on image data read by said reading step;
- a recording head moving step of reciprocating the recording head along the main-scanning direction so that forward/reverse of a moving direction of the recording head substantially corresponds to that of the image scanner;
- and
- a driving step of driving the recording elements of the recording head being moved by said recording head moving step in accordance with the recording signal generated by said signal generating step,
- wherein said driving step including a step of reversing a driving order of the recording elements of the recording head, and a step of, when a scanning direction of the recording head is in any of a forward direction and a reverse direction, activating said driving order reverse step.
Dependencies are inferred from the claim text.