GCM 250 Chapter Notes - Chapter 7: Stacker
17 Dec 2016
School
Department
Course
Professor
Document Summary
Assembling: the production of a specific sequence of folded sheets, leafs, or webs into a loosely jointed block. Two principles of assembling sheets into blocks are collating and inserting. Each signature is temporarily stored in its own storage unit. Structure of a conventional gathering machine (collating: folded sheet temporary storage, machine"s pre-storage, feeder for each signature, separating module that puts sheet into raceway to be conveyed by pushers and assembled, delivery. Stacker principle: for each signature batch there is a feeder (sheet separator) and separated signatures are put into the stacker one after the other. Sorter principle: signature 1 batch is separated in the feeder. Each individual signature is laid into a separate bin. When all signatures are separated, each bin contains a block with consecutive signatures. Feeder principles in gathering machines: pincer gripper and gripper drum: design elements shared by both are: Pile support for sheets remaining in the magazine. Conveyor chain with pushers: design disadvantage: sheet acceleration changes.
