How to Select Conveyors for Cartons and Cases

Select a carton conveyor around the package base, the required route and what happens when downstream equipment stops. Weight and conveyor width alone cannot establish whether the smallest carton crosses a transfer cleanly or a filled case tolerates accumulation.

This guide concerns individual cartons and shipping cases. Pallet transport needs a different support review, covered in the pallet-conveyor guide.

Illustrative photograph. Verify the smallest and most difficult packs through the complete route.

Send the difficult packages, not only the typical one

Record external length, width and height, travel orientation, minimum and maximum filled mass, and the base condition. Note bowed panels, protruding tape, straps, exposed flaps or a soft underside. Include photographs of the base and representative physical samples.

Schulz’s conveyor roller selection information relates support spacing to the smallest base dimension of the conveyed item. Use the principle to ask for the proposed support arrangement; do not copy another installation’s roller pitch or rating.

Requirement	Information to provide	What the supplier should demonstrate
Smallest footprint	Dimensions in its actual travel orientation	Support at every transfer and operating position
Heaviest filled case	Mass and where the contents bear on the base	Suitable support and drive selection
Fragile or deformable pack	Compression and handling limits	Acceptable condition after transport and queueing
Turning or merging	Required exit orientation and arrival pattern	Reliable orientation and spacing through the route
Identification	Label position and scan requirement	Readable presentation at the scan point

Compare the conveying surface with the task

A roller proposal needs an explicit support and gap review for the smallest base. A belt proposal also needs checks at its end transfers, where the belt surface stops supporting the package. Neither label is a substitute for testing the actual package across the complete path.

Ask separately about straight transport, incline or decline, merging, rotation and precise machine feeding. These may require different sections within one line. For an inclined section, require a trial under the specified package condition and operating direction; do not infer traction from a dry, empty carton test.

Decide how cases wait

Tell the supplier whether cartons may touch in a queue and how much pressure or deformation is acceptable. If the design uses individually controlled accumulation zones, establish occupancy detection, release logic and the product length assumptions for each zone. The supplier should explain how a short carton, a gap in production and a stopped downstream machine change the sequence.

For a buffer requirement, provide the expected interruption duration and upstream arrival rate. Ask how much usable queue capacity remains after allowing for package spacing and occupied transfer areas. A conveyor’s overall length is not the same as its available accumulation length.

Review the machine handoff

Confirm transfer height, travel direction, orientation, product gap and downstream permission to release. Ask who detects a skewed package and how operators retrieve it under the approved access procedure. Use the packaging integration checklist to assign those responsibilities across vendors.

Test the smallest, heaviest and least stable representative packages over transfers, stops, starts and queue release. Agree acceptable product condition and jam handling before the demonstration. These are project test questions, not a generic operating procedure or proof of a particular conveyor’s suitability.

Prepare the package matrix, base photos, route drawing, required good-output rate, queue conditions and upstream/downstream machine drawings. Attach them to the RFQ checklist and use material handling to compare other transport stages.