Erasing device, image forming apparatus, and erasing method
AssigneesKabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
InventorHiroyuki Taguchi
Life of this patent
Estimating the term…
Abstract
An erasing device includes a line scanner on an upstream side in a recording medium conveying direction, includes a thermal head downstream in the recording medium conveying direction of the line scanner, and includes a platen in a position opposed to the thermal head as a heating device across a recording medium conveying path. The erasing device causes the heat generating elements of the thermal head in positions corresponding to color and density sensors in positions of an image detected by the line scanner to generate heat. The erasing device controls, according to detected colors or density, a quantity of heat to be generated.
Claims20
An erasing device configured to erase an image formed on a recording medium, the erasing device comprising:
- a line scanner configured to read an image formed on a recording medium conveyed thereto;
- a thermal head set downstream in a recording medium conveying direction of the line scanner and on a same side as the line scanner with respect to a conveying path for the recording medium and including plural heat generating elements;
- and
- an erasing-device control section configured to change, according to an output of the line scanner, positions of the heat generating elements to be caused to generate heat and a quantity of heat of each of the heat generating elements.
An image forming apparatus including an erasing device, the image forming apparatus comprising:
- an electrostatic-latent-image bearing member configured to bear an electrostatic latent image;
- a developing-agent supplying unit configured to supply a developing agent to the electrostatic latent image;
- an image bearing member configured to bear a developing agent image;
- a fixing device configured to fix the developing agent image on a recording medium;
- and
- an erasing device including:
- a line scanner configured to read an image formed on a recording medium conveyed thereto;
- a thermal head set downstream in a recording medium conveying direction of the line scanner and on a same side as the line scanner with respect to a conveying path for the recording medium and including plural heat generating elements;
- and
- an erasing-device control section configured to change, according to an output of the line scanner, positions of the heat generating elements to be caused to generate heat and a quantity of heat of each of the heat generating elements.
An image erasing device configured to erase an image on a recording medium, the image erasing device comprising:
- a recording-medium accumulating section configured to accumulate recording media;
- a recording-medium conveying mechanism configured to extract the recording media from the recording-medium accumulating section one by one and convey the recording medium;
- and
- an erasing device including:
- a line scanner configured to read an image formed on a recording medium conveyed thereto;
- a thermal head set downstream in a recording medium conveying direction of the line scanner and on a same side as the line scanner with respect to a conveying path for the recording medium and including plural heat generating elements;
- and
- an erasing-device control section configured to change, according to an output of the line scanner, positions of the heat generating elements to be caused to generate heat and a quantity of heat of each of the heat generating elements.
An erasing method for an erasing device configured to erase an image on a recording medium, the method comprising:
- a line scanner reading an image formed on a recording medium conveyed thereto;
- and
- an erasing-device control section changing, according to an output of the line scanner, positions of heat generating elements of a thermal head to be caused to generate heat and a quantity of heat of each of the heat generating elements, the thermal head being set downstream in a recording medium conveying direction of the line scanner and on a same side as the line scanner with respect to a conveying path for the recording medium and including plural heat generating elements.
Dependencies are inferred from the claim text.