Recording medium removing apparatus, erasing apparatus, automatic document feeding apparatus, and recording medium removing method

An erasing apparatus comprising:

• a recording medium conveying mechanism configured to convey a recording medium;
• a first thickness sensor configured to change an output signal if the thickness of the recording medium is equal to or larger than a first threshold;
• a conveyance guide provided downstream in a recording medium conveying direction of the first thickness sensor and forming a recording medium conveying path;
• a conveyance guide displacing device configured to displace the conveyance guide to expand the recording medium conveying path;
• and
• a heating device configured to heat the recording medium to temperature equal to or higher than erasing temperature.

An automatic document feeding apparatus comprising:

• a document tray on which an original document is placed;
• a pickup roller configured to pick up the original document from the document tray;
• a document feeding roller of a conveying mechanism configured to convey the original document;
• a first thickness sensor configured to change an output signal if the thickness of the original document is equal to or larger than a first threshold;
• a conveyance guide provided downstream in a document conveying direction of the first thickness sensor and forming a document conveying path;
• a conveyance guide displacing device configured to displace the conveyance guide to expand the document conveying path;
• a document reading section configured to cause the original document to pass to a scan position;
• a document reversing mechanism configured to reverse a front and a back of the original document;
• and
• a paper discharge tray onto which the original document is discharged and stacked.