A merge conveyor combines product from two or more conveyor lines into a single controlled stream, then meters that stream onto a sorter through induction. It uses gapping conveyors to set consistent space between cases, so each one can be scanned, labeled, and diverted accurately. Merge and induction together feed the sorter without jams or collisions.

Key facts

•   Combines multiple case conveyor lines into one stream for sortation

•   Gapping conveyors set the spacing induction needs

•   Two gap methods: blow-through (similar sizes) and optimization (mixed sizes)

•   Optimization gappers use sensors to speed up or slow down and re-distribute gaps

•   Merge units like the 25-RBM carry up to 225 lbs per foot

•   Gaps enable barcode scanning, weighing, and print-and-apply labeling

How does a merge conveyor work?

A merge conveyor brings several infeed lines together at a controlled junction, often a sawtooth merge or combiner, releasing cases from each line in turn so they form one continuous stream without colliding. That single stream then passes over a gapping conveyor, which sets the right distance between cases by running at a different speed than the conveyor before it. With consistent gaps in place, the stream reaches induction, where scanners read each barcode and the control system assigns a destination before the case enters the sorter. Correct gapping is what lets the sorter divert accurately at full speed.

Merge and induction components

 

Where are merge conveyors used?

•   Multi-line distribution centers feeding a central sorter

•   E-commerce and parcel sortation operations

•   3PL facilities consolidating multiple client lines

•   Retail store-replenishment shipping

•   Print-and-apply and in-motion scanning lines

•   Any operation merging several pick zones into one ship lane

Why does merge and induction matter for sortation?

A sorter is only as fast as the stream feeding it. Without controlled merging and correct gaps, cases arrive bunched or starved, the sorter mis-diverts or slows, and throughput drops at exactly the moment volume peaks. Proper merge and induction set steady spacing so scanners read every barcode and the sorter diverts cleanly at full speed. Most sortation bottlenecks trace back to the merge, not the sorter itself.

Plan a merge and induction system

HOJ engineers and integrates merge and induction conveyor as a Hytrol partner, sizing merge points and gapping to your line count, case mix, and sorter speed so product reaches the sorter cleanly. Talk to a conveyor specialist.