Pulley plunger assembly

The present invention relates generally to article conveying or transporting systems, and more particularly to a new and improved system for use within, for example, mail, or similar article, handling, transporting, and sorting systems, wherein relatively flat pieces or units of mail, or similar articles, having different thickness dimensions, can nevertheless be properly, rapidly, and efficiently handled, transported, and sorted without becoming damaged as a result of the conveyance or transportation of the pieces or units of mail, or similar articles, through the various conveying or transporting stages of the system, and without causing jamming of the system which would obviously necessitate an undesirable operational shutdown of the conveyor system while maintenance personnel perform necessary maintenance and repairs in order to effectively unjam or unblock the system and return the same to online operational status. A conveyor system for conveying pieces or units of mail, or similar articles, comprises a fixed side and a movable side. The fixed side comprises a first conveyor belt which has a first inner run section partially defining an article flow path and which is routed around a plurality of pulleys which have their axes fixed with respect to the article flow path. The movable side comprises a second conveyor belt which has a second inner run section cooperating with the first inner run section of the first conveyor belt so as to cooperate therewith in defining the article flow path and which is routed around a plurality of pulleys or wheels which are movable with respect to the article flow path so as to accommodate the conveyance of different articles, having different thickness dimensions, along the article flow path.