Detection method for fill-up of stacker with paper sheet

Abstract

Abstract PURPOSE: To enable assured detection of the condition that a stacker has been filled up with paper sheets by ensuring that a fill-up indication signal is generated when a fill-up detection signal has continued over a predetermined time period. CONSTITUTION: Above a stacker 1 there are arranged an oscillatable arm 2 and the contact point of a detector 3 which operates accordingly to the displacement amount of the arm 2. The detector 3 is connected to a flip-flop 5 consisting, for example, of an invertor 4 and NAND gates 6A and 6B, and the fourth input terminal of the gate 6B is fed periodically with a Low-level pulse a. When there is no paper sheet P in the stacker 1 or when the stacker 1 is loaded with paper sheets P but not to the full, the output of the flip-flop 5 is at High level. When the stacker 1 has been filled up with the paper sheets P, the output c of the flip-flop 5 set by the pulse a is feld at Low level until the next period, by which the condition that the stacker 1 has been filled up with the paper sheets P is detected. COPYRIGHT: (C)1980,JPO&Japio

Inventors

• 👤 Hiroshi Fukuda

Bibliographic Details