Patent ID: 6823995
Filing Date: 2004-11-30
Classification: B65H,G07D

Abstract:
A paper processing device which has a discriminating portion sensing papers passing by a specified sensor, and by carrying out a discriminating process according to a result of the sensing, applying one of plurally classified discriminating results to the sensed papers, and wherein, at least one paper that is an objective of a paper processing process is transferred one by one along a transfer route that passes through the discriminating portion, and transfer routes of each paper after passing through the discriminating portion is changed according to discriminating results at the discriminating portion, the paper processing device comprising:a sensor output abnormality detecting portion that carries out a detecting process to detect that an output of the sensor is in a specified abnormal status according to the output of the sensor before a start of the paper processing process, and when the specified abnormal status is detected in the detecting process conducted before the start of the one process, further carries out a detecting process to detect the output of the sensor also after the start of the paper processing process; and a transfer control portion that starts the paper processing process even when either of the specified abnormal status or normal status is detected in an initial detecting process conducted before the start of the paper processing process by the sensor output abnormality detecting portion, and in the case where the specified abnormal status is detected in the initial detecting process, transfers at least one paper that passes through the discriminating portion after the start of the paper processing process until a normal status is detected in the detecting process of the sensor output carried out after the start of the paper processing process, along a transfer route corresponding to the specified abnormal status after the at least one paper passes through the discriminating portion, wherein the sensor is cleaned by transfer of paper, and sensor cleaning and the paper processing process are accomplished in parallel.