Patent ID: 8810874
Filing Date: 2014-08-19
Classification: B65H,H04N

Abstract:
1. A duplex scanning apparatus, comprising: a sheet entrance and a sheet exit; a sheet feeding channel connected to said sheet entrance; a sheet pick-up module disposed in said sheet entrance for feeding a document into said sheet feeding channel; a sheet transfer channel arranged between said sheet feeding channel and said sheet exit; an inverting channel, wherein a first end of said inverting channel is connected to a junction between said sheet feeding channel and said sheet transfer channel, and a second end of said inverting channel is connected to said sheet transfer channel; an image reading module disposed in said sheet transfer channel for reading an image of a document; a transfer roller assembly for transferring said document which is located within said sheet feeding channel, said sheet transfer channel or said inverting channel; a sheet sensing module for sensing a transmitting status of said document in said inverting channel, thereby issuing a sensing signal, wherein said sheet sensing module comprises: a controller electrically connected to said sheet pick-up module and said sheet sensing module, wherein in response to said sensing signal, said controller drives said sheet pick-up module to feed a next document into said sheet feeding channel, wherein a distance between said sheet sensing module and said first end of said inverting channel is greater than a distance between said sheet sensing module and said second end of said inverting channel.