Paper wrap detector

Abstract

Abstract Translated from Japanese (57)【要約】 【課題】 用紙の材質や異物の存在に関係なく、定着ロ ーラへの用紙の巻き付きを確実に検知する。 【解決手段】 定着ローラ４０の用紙搬送面に接触する ように第１電極６０を設け、定着ローラ４０に対して離 接可能とし、間欠的に離接する。除電ブラシ５０を第２ 電極６１として利用し、両電極６０，６１を検出回路６ ２に接続する。第１電極６０に電圧を印加して、第２電 極６１から電圧を検出して、両電極６０，６１間の抵抗 を検出する。用紙Ｓがあれば、その抵抗値が大きくなる ので、用紙巻き付きを検知できる。 (57) [Summary] [PROBLEMS] To reliably detect winding of a sheet around a fixing roller regardless of the material of the sheet or the presence of foreign matter. SOLUTION: A first electrode 60 is provided so as to be in contact with a sheet conveying surface of a fixing roller 40, and is capable of being separated from and connected to the fixing roller 40, and is intermittently separated. Remove the static elimination brush 50 from the second The two electrodes 60 and 61 are used as the detection circuit 6 Connect to 2. A voltage is applied to the first electrode 60, a voltage is detected from the second electrode 61, and a resistance between the two electrodes 60, 61 is detected. If the sheet S is present, its resistance value is increased, so that sheet winding can be detected.

Inventors

• 👤 Toshiro Mukai
• 👤 俊郎 向井

Bibliographic Details