Primary Packaging and Retail Presentation
Bakery and confectionery
The continuous webbed corners keep crumbs, sugar, and fine powders contained, making this an excellent primary tray for baked goods.
Premium retail inserts
The double walls hide the unprinted side of the board, providing a clean, finished frame for cosmetics, skincare, or electronics.
Small hardware and loose parts
Because the base corners have no open slots, small fasteners, beads, or loose components will not sift out during handling.
Medical and cleanroom kitting
The lack of open corner gaps reduces the chance of external dust entering the base of the tray before it is sealed in a pouch or sleeve.
Bakery, Cosmetics, and Premium Kitting
High-volume manual fulfillment
The pre-glued side walls reduce the time it takes an operator to square the tray compared to fully unglued four-corner designs, speeding up hand-packing lines.
Premium unboxing experiences
The fold-over end walls and pre-glued side walls create rolled top edges all the way around the tray, removing sharp paperboard edges from the customer's view.
Space-constrained packing floors
While delivered flat, the pre-glued format allows operators to pop the trays open quickly without needing complex folding jigs or automated erectors.
When to Consider Unglued or Standard Trays
Heavy transit without an outer box
This is an open tray. It requires a custom sleeve, a separate lid, or placement inside a master shipper to handle parcel or courier networks safely.
Strictly budget-driven manual runs
The pre-gluing stage adds a manufacturing step. If packing labor is abundant or volumes are low, a fully unglued tray might be a more practical choice.
Board Thickness and Assembly Planning
Board caliper and corner binding
Thick boards can cause the webbed corners to bulge, making the end flaps difficult to lock. Crease offsets must be planned carefully if using heavier materials.
Delivery format and storage
Confirm that your facility has the space for knocked-down-flat (KDF) pre-glued trays, which are slightly thicker in the stack than completely unglued flat blanks.
Outer packaging requirements
Determine how the tray will be sealed for transit. As an open-top design, it must be paired with a sleeve, a lid, or a master carton.
Print surface and interior branding
Because the inner walls fold over, they display the printed side of the board on the inside of the tray, allowing for continuous branding without requiring two-sided printing.
Adjusting Lock Friction and Corner Clearance
Locking tab angles
The friction fit of the end walls can be adjusted by changing the bevel angle of the locking tabs, ensuring they hold securely without tearing the board.
Webbed flap offset
The depth of the corner relief cuts can be tuned to accommodate different material thicknesses, preventing the bellows fold from binding.
Wall height proportions
The height of the tray dictates the size of the webbed corners. Very tall trays may require modified corner geometry to ensure the gussets fold flat against the end walls.
Board and packing details
Grain direction planning
To prevent cracking during the 180-degree fold-overs, the paperboard grain direction should typically run parallel to the main fold-over hinges.
Template Variants
B31.04.00.00.a
Features minor geometric adjustments to the locking tabs and corner relief cuts, often used to optimize automated erecting equipment or specific board calipers.
Additional notes
Machine erection compatibility
While this tray is very efficient for hand packing, it is also compatible with plunger-style automated erecting machines. The locking tab clearances can be tuned to match specific equipment tolerances.
FAQs
Assembly and Packing
Does this tray require gluing on the packing line?
No. The side walls are pre-glued by the manufacturer before delivery. Your team simply pops the tray open and folds the end walls over the corners to lock it.
Product Fit and Containment
Will the webbed corners hold liquids?
No. While the continuous webbed corners are excellent for preventing dry powders, crumbs, or small parts from sifting out, the folded board will absorb moisture unless a specific barrier coating is applied.
Board and Material
Can this tray be made from corrugated board?
It is generally a poor fit for corrugated material. The 180-degree folds on the side walls and the complex bellows fold in the webbed corners tend to crush or bind when using thicker flutes. It performs reliably in standard folding carton paperboards.
Shipping and Route
Is this tray ready for parcel shipping?
Not on its own. As an open-top tray, it requires a custom sleeve, a separate lid, or placement inside a secure outer shipping box to handle transit.
Print and Finish
Do I need two-sided printing to have a branded interior?
Often, no. Because the side and end walls fold 180 degrees inward, the primary printed side of the board becomes the visible interior wall, giving a premium look with standard one-sided printing.
Production Route
Why choose a pre-glued tray over an unglued one?
Pre-glued trays require a folder-gluer process during manufacturing, but they greatly reduce the time and labor required for your team to assemble them on the floor.
Storage and Delivery
How is this tray delivered?
It is delivered knocked-down flat (KDF). The long side walls are already glued and folded flat, so the tray takes up slightly more vertical space on a pallet than a completely unglued blank.
Assembly and Packing
How do the end walls stay closed?
The inner end walls feature small locking tabs that friction-fit into slots at the base of the tray. Once folded over the webbed corners, these tabs wedge into place to hold the structure rigid.
