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EVC41040

Corrugated Corner Lock Tray

Available in a wide range of custom configurations & material selection.
Order 1 sample. Or order 100K+ units. Or anything in between.
Affordable delivery across North America.
Design support, warehousing, testing, assembly available.
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Product details

Top highlights

Assembles manually without adhesive or stitching
Single-wall sides with double-thick locking corners
Relies on an outer box or master shipper for parcel transit

About this product

The EVC41040 is a one-piece corrugated tray that locks together using mechanical tabs and slots, assembling without adhesive or stitching. Delivered flat, it is designed for fast manual assembly at the packing station.

Because it uses a single-wall construction with reinforced corners, it balances material efficiency with enough rigidity for in-plant kitting, retail bakery displays, and shallow parts handling. It is an open-top tray, meaning parcel or LTL transit relies on a master shipper or pallet wrap.

Common uses

In-plant parts handling and kitting.
Retail bakery and produce displays.
Secondary packaging inside a master shipper.
Shallow component sorting.

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In-Plant Kitting and Retail Display Roles

In-plant parts handling and kitting

The open top and fast manual assembly make this tray a strong fit for moving components between workstations. The flat base carries weight evenly, while the locked corners resist outward splay when loaded with loose parts.

Retail bakery and produce displays

The clean interior and lack of adhesive make it suitable for retail environments. The flat blank can be printed on both sides before die-cutting, allowing for strong branding on the outer walls and inner base.

Secondary packaging for master shippers

Grouping smaller retail cartons or loose items inside a larger corrugated shipper. The tray keeps items organized during transit and allows for quick unpacking at the destination.

Shallow component sorting

Organizing parts on an assembly line. The open top keeps components visible and accessible, while the flat base sits evenly on workbenches.

Manual Packing Stations and Short-Run Fulfillment

Manual packing stations

This tray is designed for hand assembly. The flat blanks take up minimal space at the packing bench, and operators can erect the tray quickly by folding the walls and pushing the corner tabs into their receiving slots.

Short-run promotional fulfillment

When automated tray erectors are not justified by the order volume, this unglued tray allows teams to set up displays or kits entirely by hand.

Agricultural and farm-gate packing

For local produce distribution, the flat delivery and tool-free assembly make it easy to set up packing operations directly at the sorting location.

When to Consider Enclosed Shippers or Automated Packaging

Parcel shipping and individual transit

This is an open-top tray. If the product ships individually through a courier network, evaluate a roll-end tuck-top mailer or plan to pack multiple trays into a standard corrugated master shipper.

High-speed automated erecting

The corner lock mechanism is designed for manual assembly. If your packing line uses automated linear folder-gluers or automated tray erectors, a glued four-corner tray or a crash-lock base may be a better fit.

Heavy vertical stacking

Because it has an open top and single-wall sides, it does not support heavy stacking on its own. If trays will be stacked high on a pallet without a master shipper, a design with stacking tabs or a lid is worth reviewing.

Liquid or fine powder containment

The slotted corners leave small gaps. If packing fine powders or items that could leak, a tray with webbed or glued corners provides better containment.

Board Thickness and Lock Friction

Board thickness and lock retention

The width of the receiving slots is strictly tied to the thickness of the corrugated board. If you test a prototype in E-flute and later switch to a thicker B-flute, the cutting die will need an update. Mismatched board and slot widths cause the tabs to tear or slip out under pressure.

Flute direction for load bearing

Depending on how the tray is handled or stacked inside a master carton, the corrugated flute direction should be oriented to support the primary load-bearing walls.

Print surface and branding

Because the tray is cut from a single flat piece of corrugated board, both the inside and outside surfaces can be printed easily before die-cutting. Decide whether the interior base or the exterior walls carry the main branding.

Assembly labor budget

While it avoids adhesive costs, the slot-and-tab mechanism takes slightly longer to fold by hand than a pre-glued crash-lock base. Evaluate whether the material savings offset the manual packing time.

Tab Taper, Wall Height, and Cutouts

Tab taper and slot positioning

The angle of the locking tabs and the exact placement of the slots can be adjusted to change how tightly the corners lock. A tighter friction fit improves rigidity but takes slightly more effort from the packing operator.

Wall height adjustments

The depth of the tray can be modified by changing the height parameter. Taller walls provide more containment for loose parts, while shallower walls improve visibility for retail displays.

Hand hole additions

Cutouts can be added to the short or long walls to make lifting easier. These should be placed away from the corner slots to maintain the strength of the locking mechanism.

Packing details

Flatbed die-cutting and blank nesting

The cross-shaped flat blank nests efficiently on a sheet of corrugated board, minimizing waste. Because of the internal slots and locking tabs, this tray is typically produced using flatbed die-cutting.

Standard Corner Lock Variants

Alternate tab and slot geometries (EVC41041, EVC41042)

Sibling templates offer different corner lock styles and flap angles, which can be evaluated if the standard tab taper does not provide the right balance of assembly speed and friction fit for your chosen board.

Additional notes

Slot width and board changes

If you change your corrugated board grade after the initial design is approved, the cutting die will need an update. The locking slots are sized exactly to the board's caliper.

FAQs

Does this tray use adhesive to stay together?

No. The short walls feature extended flaps with small tabs that push into vertical slots on the long walls. This mechanical friction fit holds the tray together during normal handling.

Can this tray be erected by automated machinery?

This specific corner-lock design is intended for manual assembly at a packing station. It is generally a poor match for automated linear folder-gluers unless specialized tray-forming equipment is validated.

Which corrugated board grades fit this tray?

Thinner boards like E-flute are common because they fold cleanly and allow the locking tabs to seat easily. Thicker boards like C-flute or double-wall can make the corners too stiff to fold manually and increase the risk of the slots tearing.

Can I ship this tray through the mail?

Not on its own. It is an open-top tray with no native closure. For parcel transit, the loaded tray should be placed inside a master shipping box or mailer.

Why is a physical sample important for this tray?

The security of the corner lock depends entirely on the friction between the tab and the slot. A physical sample confirms that the chosen board thickness matches the slot width perfectly, ensuring the tray stays locked under load.

Can the inside of the tray be printed?

Yes. Because the tray is cut from a single flat piece of corrugated board, both the inside and outside surfaces can be printed easily before the blank is die-cut and shipped.

How are these trays delivered?

They are delivered completely flat. The cross-shaped blanks stack densely on a pallet, which minimizes shipping and storage space before they are assembled at the packing station.

Can I add hand holes for lifting?

Yes, hand holes can be cut into the side panels to help operators lift loaded trays. They should be positioned away from the corner slots to avoid weakening the locking tabs.