In-Plant, Produce, and Inner Tray Packing
In-Plant Work-in-Progress Handling
Because these trays can be stored flat and erected on demand, they are useful for moving components or semi-finished goods between stations. The mechanical lock holds the shape during internal transit.
Produce and Bakery Transport
The open-top design allows for ventilation and easy access, making it a common choice for agricultural goods and baked items. The lack of glue also simplifies recycling at the destination.
Inner Trays for Master Shippers
When packing multiple items into a larger corrugated box, this tray acts as a rigid base or sorting layer. The locking tabs keep the tray intact while it is lowered into the outer carton.
Parts Kitting and Sorting
For assembly lines or repair kits, the tray provides a clear, open view of multiple components. The manual setup allows operators to build trays exactly as needed without relying on automated forming equipment.
Fulfillment and Processing Contexts
Manual Packing Stations
This tray relies entirely on manual labor. Operators fold the side flaps inward and align four separate tabs into their corresponding slots. It fits well in environments where pack speed allows for a few seconds of assembly per unit.
Agricultural and Field Packing
Because the trays assemble without machinery, tape, or glue, they can be set up directly in the field or at temporary packing stations during harvest seasons.
Low-Volume Fulfillment Operations
For operations that do not have the volume to justify automated tray formers, this flat-shipping design provides a sturdy tray while keeping equipment needs low.
When to Compare Glued or Fold-Over Trays
High-Speed Automated Packing
If your line relies on automated tray formers or folder-gluers, a machine-erected tray or a pre-glued crash-lock base will be much faster. This corner lock design is built for hand assembly.
Premium Retail Display
The locking tabs push through the slots and remain visible on the outside of the longer walls. If you need a completely smooth, uninterrupted exterior for high-end graphics, compare this with a roll-end tray or a glued-corner tray.
Direct Parcel Shipping
As an open-top tray, this package is rarely shipped through courier networks on its own. It usually needs a lid, shrink wrap, or insertion into a master shipping box.
Board Thickness, Print, and Assembly Labor
Board Flute and Lock Binding
The width of the receiving slots should match the thickness of the corrugated board. While E-flute and B-flute generally work well, thicker C-flute or double-wall boards can cause the tabs to bind or the slots to tear during assembly. The board choice should be validated against the lock geometry.
Stacking and Top Load
This tray features single-wall edges all around. It does not have the rolled, double-wall sides found in some display trays. Heavy top loads should be tested carefully, as single walls are more vulnerable to buckling under vertical pressure.
Print Surface and Tab Visibility
Because the locking tabs fold inward and then push out through the slots, the inside liner color of the corrugated board will be visible on the exterior of the tabs. This should be considered if the inside and outside of the board are different colors.
Packing Speed and Labor
The tab-and-slot design trades automated gluing during production for manual assembly at the pack bench. Operations should verify that their packing teams can absorb the time needed to align and lock the four corners.
Adjusting Clearances and Wall Heights
Tab and Slot Clearances
The width of the locking tabs and the length of the receiving slots can be adjusted to fine-tune the friction fit. A tighter fit increases security but slows down hand assembly, while a looser fit speeds up packing but may feel less rigid.
Hand Hole Additions
For easier carrying, hand holes can often be added to the shorter width walls. They should be placed carefully to avoid weakening the corners or interfering with the locking flaps.
Wall Height Adjustments
The height of the side walls can be modified to accommodate different product volumes or stacking needs, though very tall walls may make the manual locking motion more difficult for operators.
Packing details
Flat Shipping Density
Because the tray is unglued and ships completely flat, it offers excellent pallet density, reducing inbound freight space compared to pre-glued or nested trays.
Additional notes
Flatbed die-cutting production
Due to the angled side flaps and internal receiving slots, this tray is typically produced using flatbed die-cutting tooling rather than standard rotary slotting.
FAQs
Does this tray require tape or glue?
The tray relies entirely on a mechanical tab-and-slot design. The side flaps fold in, and their tabs push through slots on the adjacent walls to lock the tray in place without adhesive.
Can this tray be erected by automated machinery?
It is primarily designed for manual assembly at a pack station. Standard linear folder-gluers are generally not a fit for this unglued, slotted design.
Which board thicknesses fit the corner lock?
Thinner profiles like E-flute and B-flute are usually the safest choices. Thicker boards often need careful adjustment of the slot widths to ensure the tabs can push through without tearing the corrugated material.
Can I ship this tray through a parcel network?
Because it has an open top, it is typically placed inside a master shipping box or securely wrapped before entering a mixed-carrier courier network.
Will the locking mechanism interfere with exterior printing?
The locking tabs protrude through the longer side walls, meaning a small portion of the tab will be visible on the outside of the tray. This tab will display the inside liner color of the board.
How much weight can this tray support when stacked?
Stacking strength depends heavily on the chosen board and the product inside. Because the tray uses single-wall edges rather than folded double walls, it is more susceptible to buckling under heavy top loads and should be physically tested.
Can hand holes be added to this tray?
Yes, hand holes can usually be cut into the shorter width walls. They should be positioned away from the corner locking flaps to maintain the tray's rigidity.
How is this tray delivered?
The tray ships completely flat. This maximizes pallet density and reduces storage space requirements before the trays are assembled at the packing station.
