Patent ID: 8828165

Claim:
A spacing interval control method for controlling a constant spacing interval between any two adjacent ones of multiple documents, said documents being successively transported from an automatic document feeding mechanism to a sheet laminating mechanism, said automatic document feeding mechanism comprising a sheet entrance, a sheet exit communicating with said sheet laminating mechanism, a sheet pick-up roller module, a sheet feeding channel, a transfer roller module, a first sensor and a second sensor positioned upstream of said first sensor in a sheet feeding direction said multiple documents being successively transported from said sheet entrance to said sheet exit by said sheet pick-up roller module and/or said transfer roller module, said spacing interval control method comprising steps of: (A) successively feeding and transporting said multiple documents into said sheet feeding channel through said sheet entrance by said sheet pick-up roller module, so that said documents are successively advanced in said sheet feeding channel by said sheet pick-up roller module and/or said transfer roller module, said specified document that is being transported in said sheet feeding channel is detected by said second sensor, wherein once said tail edge of said specified document is detected by said second sensor, said next document is fed into said sheet feeding channel through said sheet entrance by said sheet pick-up roller module; (B) using said first sensor to detect a specified document that is being transported in said sheet feeding channel, wherein once a tail edge of said specified document is detected by said first sensor, said sheet pick-up roller module and/or said transfer roller module stops transporting said specified document; and (C) using said second sensor to detect said specified document that is being transported in said sheet feeding channel and a next document following said specified document, wherein once a front edge of said next document is detected by said second sensor, said sheet pick-up roller module and/or said transfer roller module is enabled again, so that said specified document is continuously transported and said next document is continuously advanced in said sheet feeding channel by said sheet pick-up roller module and/or said transfer roller module, wherein said second sensor is disposed at a rear end of said first sensor and spaced from said first sensor by said spacing interval.