Patent ID: 6839458

Claim:
A processing apparatus for discriminating various types of paper, comprising: a line sensor scanning various types of paper conveyed into the processing apparatus and for conducting data sampling; an insert sensor detecting the conveyance of various types of paper, arranged on one side of the line sensor; a sensor memory accommodating sampling data, which are obtained by the line sensor, by a line unit; and means for making pattern image data by obtaining sampling data in a predetermined reading-out direction from the sensor memory for accommodating the sampling data, wherein in a case where various types of paper are conveyed from one side of the line sensor, data sampling is started when the insert sensor detects the passage of the various types of paper, in a case where various types of paper are conveyed from the other side of the line sensor, data sampling is started before the various types of paper are conveyed, and the various types of paper are discriminated by the thus made pattern image data and reference pattern data corresponding to the pattern image.