Electro-optic sheet-sensing apparatus and method

摘要

An apparatus and method electro-optically senses the presence of a sheet of material by positioning a member and a light emitter relative to the sheet so that the presence of the sheet causes movement of the member and light emitter. The light emitter can include an optical fiber which produces a light spot so that movement of the light emitted can be sensed by an electro-optic sensor based on the position of the light spot on a photosensitive zone within the electro-optic sensor. A sheet-feeding mechanism can be properly positioned to insure proper placement of the sheet.