Patent ID: 6224053
Filing Date: 2001-05-01
Classification: G01B,G07D

Abstract:
A method for verifying a correct transport of sheet material employing a mechanical touch sensor comprising the steps of:providing a dispensing device employing a mechanical touch sensor for transporting said sheet material, said mechanical touch sensor includes a touching lever and a Hall generator, each positioned at a measuring location along a measuring path of said dispensing device, said touching lever includes a permanent magnet that generates a magnetic field, said Hall generator includes a semiconductor component having an active surface through which a control current flows;setting said control current for generating a control signal having a predetermined tolerance range value, said predetermined tolerance range value is determined for a single correct sheet of said sheet material;transporting said sheet material having a thickness along said measuring path;detecting said thickness at said measuring location by passing said magnetic field through said sheet material and into said active surface, said magnetic field varies with said thickness;generating said detection signal, said detection signal varies with said magnetic field;comparing said detection signal to said control signal for determining said correct transport of said sheet material.