「Zの分離作用と相まって最下層に位置する用紙のみが分離されて送り出されます。」という一文の適訳は、

Only the sheet located on the bottommost layer is separated and fed by separating action of a separation guide face of the separation block as well as the frictional transportation force.

ではなく、

In tandem with the frictional conveyance force, only the sheet that is located on the bottommost layer is separated and fed by means of the separating action of the separation guide face of the separation block.

です。