In a mail processing system that delivers articles to delivery locations a first transport vehicle at a first loading point is loaded with a first article, and guided along a first delivery path to a first delivery location. The apparatus includes a bag and a channel extending from the conveyor to the bag to direct leaves therebetween. A front-end part of at least one of the light source terminal plates is bent toward the other light source terminal plate so as to differentiate the first and second light sources in an irradiating direction. A label wrapper is fixed to the base assembly adjacent to the printer for receiving the printed label and an object.