Abstract: In order to accommodate either a loose lift of signatures or, alternatively, a signature log for the purpose of stream feeding a supply of signatures to a packer box on a binding line in an effective and efficient manner, a signature stream feeding apparatus is disclosed which includes an upstream conveyor, an intermediate conveyor, and a down stream conveyor. The upstream conveyor receives and supports signatures in a generally upright position on the fore edges or backbones thereof, and it is downwardly inclined relative to the horizontal in the direction of signature travel therealong. The intermediate conveyor then receives the signatures from the upstream conveyor and conveys them toward the packer box, and it is inclined upwardly and away from the upstream conveyor in the direction of travel of the signatures therealong.