Visual defects
Irregularities, deformation or other visible quality issues.
07Application solution
Rejecting & depositing conveyor systems
Remove failed products safely, route accepted output consistently and place products exactly where the next process needs them.
08Why is rejecting necessary?
Protect quality before products reach the market.
Rejecting is a necessary production step because not every item is suitable for sale. The archived source cites estimates placing rejected parts at approximately 2% of output, although the actual rate varies by product and process.
Products falling short of specification must be removed before they reach suppliers or the marketplace. A reject conveyor can direct them onto another conveyor or into a reject bin or accumulator for removal.
Incorrect weight
Products outside the specified weight tolerance.
Missing components
Absent caps, flaps, labels or required product elements.
Identification failure
Incorrect, missing or unreadable barcodes and labels.
Safety-test failure
Failed metal-detection, X-ray or other inspection results.
Routing decision
Diverters, pushers and gates can redirect affected products.
09Reject mechanisms
Six proven ways to remove a product.
Product size, weight, stability, speed, required movement and available space determine the appropriate mechanism.
Air blast
A controlled burst of air moves suitable lightweight products away from the accepted flow.
Pneumatic pusher
A linear pusher moves a detected product off the main conveyor path.
Overhead sweep
An overhead device sweeps products laterally without occupying space beside the line.
Pneumatic retract
A conveyor section retracts when triggered so the rejected product drops through the opening.
Pivot down or up
A pivoting conveyor section changes position to send the product to an alternate route.
Linear actuation
An electrically or pneumatically actuated mechanism performs the required reject movement.
10Custom reject design
Match the movement to the product.
Individual product characteristics and weight influence the retract type, reject distance, required motion and movement speed. Customization ensures the mechanism removes the failed item without disrupting accepted production.
Consistent delivery raises process quality and throughput while allowing products to follow different routes, such as individual packing or bulk filling.
A retracting tail receives an inspection signal and opens the conveyor path so the identified product can fall into a bin, accumulator or alternate conveyor.
11Safe, efficient removal
From a line stop to automatic rejection.
A simple system may stop for manual removal. Automated systems can act immediately when inspection equipment identifies a questionable product.
Manual or low-technology response
The line stops so an operator can remove the failed item. A manual divert arm and powered transfer can guide products where the application permits.
Automatic retract rejection
A metal detector, X-ray system or other inspection device sends a signal; the tail retracts and drops the product into a reject bin or accumulator.
Restricted-access automation
Automatic rejection is especially valuable in tight areas where employees cannot easily reach the line or respond to every alarm.
Source case 01
Cartons, printing and a 90-degree transfer
A six-conveyor arrangement moved different-sized cartons through two inkjet printers. Cartons were justified, transferred 90 degrees and routed with roller-belt technology; improperly taped cartons moved onto a curved skate-wheel reject route.
Source case 02
Cleanroom inspection and two reject points
A cleanroom system dropped rejected parts into a custom chute. A later quality inspection used a pneumatic divert gate to push additional failed parts down another chute.
12Depositing conveyor systems
Place products in precise rows or columns.
Products may need to be deposited onto another conveyor, a tray, a pallet or into a box. A retract conveyor equipped with sensors can place each item where the next process expects it.
Accurate depositing increases throughput and repeatability. Correctly located products reduce the movement and time required by downstream processes.
- Functions
- Depositing, rejecting, stacking and routing
- Triggers
- Sensors, push-buttons or manual retraction
- Patterns
- Rows, columns and multiple drop zones
RetractProduct falls into position
Source depositing case
3 ft in 0.6 seconds
A high-speed retractable conveyor stacked sheets of thin extruded food product. At the conveyor end, a sensor triggered the tail to retract three feet in 0.6 seconds, allowing the product to fall onto a cart below.
Retracts may use several drop zones and operate infrequently, on demand or every few seconds with precision.13Industries
Used wherever products are packaged or inspected.
Rejecting and depositing occur across industries. Food and sanitary production and general manufacturing illustrate two of the most common environments.
Fast placement with cleanable construction.
Applications include meat and poultry, dairy and cheese, baking and confectionery, and ready-to-eat foods. Conveyor construction, belting and sanitary level must be selected for the facility’s product, cleaning method and applicable requirements.
- Designed for efficient cleaning
- Application-specific sanitary configuration
- Fast product placement
- Food-safety requirements considered in design
Only conforming products continue.
Material handling, industrial production and packaging lines use depositing and reject conveyors so only products meeting specification proceed to assembly or shipment.
- Product-specific inspection response
- Custom routing and drop locations
- Integration with packaging processes
- Workflow-focused system design
14Source food-production case
From manual tray loading to direct depositing.
Products previously required two employees to lift them from a conveyor onto baking trays, while two more employees supplied and filled empty trays. A retractable-tail arrangement deposited products directly onto trays. Sensors detected products on the belt and identified tray-conveyor cleats, while cleanable conveyors supported the food process.
15Application gallery
Reject, retract and deposit.
All five photographs from the archived page gallery are retained locally and organized around the two core operations.
16Related solutions
Complete the routing process.
Combine rejection and depositing with roller-belt routing, gates, chutes or retractable conveyor functions.
Remove failures. Place products precisely.
Share your inspection signal, product dimensions, line rate, reject movement and deposit pattern. Roarer can help define the system.
Discuss your application