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EVF52062

Trapezoidal-Lid File Box

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.
Widest machinery capability in America via 30+ specialist partner plants.

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Product details

Top highlights

Distinctive trapezoidal lid with a clean front slit lock
Delivered flat and opens quickly for document loading
Pairs with an outer mailer for parcel transit

About this product

The EVF52062 is a presentation and file box designed for documents, welcome kits, and flat retail items. Featuring a distinctive trapezoidal lid that secures into a front-panel slit, it offers a clean unboxing experience as a streamlined alternative to a rigid setup box.

Because the front and side walls are permanently glued during production, the box is delivered flat to your facility and opens quickly for easy top-loading. While it provides a clean presentation, the friction-based slit lock means it is often paired with an outer mailer or shipper when sent through parcel networks.

Common uses

Welcome kits
Software boxes
Archival document storage
Premium retail flat goods

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Practical Uses for the Trapezoidal File Box

Welcome Kits and Onboarding

The wide opening and angled lid create a natural presentation stage for employee onboarding materials, folders, and branded merchandise.

Software and Media Portfolios

Provides a sleek, book-like profile for software manuals, media kits, or printed lookbooks.

Archival and Document Storage

Fully encloses flat paper goods, protecting them from dust while allowing easy access on a shelf or desk.

High-End Retail Apparel

For folded shirts, scarves, or flat accessories, the presentation lid adds value to the unboxing experience before the customer reaches the product.

Industries Relying on Portfolio Cartons

Marketing and Creative Agencies

The large, uninterrupted front and back panels offer excellent billboard space for high-impact graphics, foil stamping, or embossing.

Corporate HR and Events

Because the boxes arrive flat and pre-glued, event staff can quickly open them and load materials without complex folding instructions.

Boutique E-commerce Brands

Used as an inner presentation layer, this box holds the product securely while an outer corrugated shipper handles the transit wear.

When to Consider a Different Box Style

Direct Parcel Shipping

If you need a box that can ship directly through courier networks without an outer envelope, compare this to a Roll-End Tuck-Top mailer, which features locking dust flaps and a more secure closure.

Heavy or Bulky Items

This file box relies on a glued front panel and a simple slit lock. For heavy components that might push against the front wall, a corrugated mailer may provide better support.

Key Decisions for Your File Box Order

Board Thickness and Rigidity

Because the front and back panels are large and flat, selecting a sturdy paperboard or archival board prevents the box from bowing or feeling flimsy when handled.

Outer Transit Packaging

Decide how the loaded box will reach the end user. If it will be mailed, specify a fitted outer shipping carton or poly mailer to protect the presentation box and keep the slit lock closed.

Print and Finish Placement

The trapezoidal lid overlaps the front panel. You can use this overlap creatively in your artwork, but keep critical text away from the slit where the tuck tongue slides in.

Insert Strategy

Determine whether the box will hold loose documents or if a custom insert is needed to secure smaller items like pens or USB drives alongside the paperwork.

Modifying the Trapezoidal Design

Lid Height and Angle

The vertical reach of the trapezoidal lid can be extended or shortened. The template automatically adjusts the position of the receiving slit to match the new lid height.

Tongue and Slit Width

The width of the tuck tongue can be adjusted for a tighter or looser fit, depending on the thickness of the board you choose.

Front Panel Depth

The depth of the side panels and bottom can be expanded to increase the pocket capacity for thicker document stacks or bulkier welcome kits.

Packing details

Blank Shape and Sheet Layout

The flat blank for this box is long and linear, with the lid, back, bottom, and front panels arranged in a single column. This shape can influence how efficiently the boxes nest on a standard printing sheet during large production runs.

Additional notes

Board thickness and slit tension

The width of the receiving slit is closely tied to the thickness of the paperboard. If you change board grades during prototyping, the slit dimensions should be updated so the tongue slides in smoothly without tearing the corners.

FAQs

Can I ship this file box through the mail?

Not on its own. The friction-based slit lock is designed for presentation and easy access, not for the handling of courier networks. It should be placed inside a master carton or protective mailer for transit.

Does this box require manual folding and gluing?

No. The box is glued during manufacturing and delivered to you flat. Your packing team simply pushes the edges to open the box into its final shape, making it very fast to load.

What type of board suits this design?

Heavy paperboard or specialized archival board provides the necessary stiffness to keep the large flat panels from bowing. Micro-flute corrugated can sometimes be used, but the slit lock must be carefully adjusted to accommodate the thicker material.

Can I use custom inserts inside this portfolio box?

Yes. While it is often used for loose documents, a lightweight paperboard or foam insert can be added to hold pens, USB drives, or small promotional items alongside flat printed materials.

Does the glued front panel interfere with printing?

No. The glue is applied to the interior side flaps, leaving the entire exterior of the front panel, back panel, and lid smooth and available for uninterrupted graphics.

Will the lid stay closed if the box is overfilled?

Overfilling the box can cause the front panel to bulge outward, which distorts the slit and may cause the tuck tongue to slip out. It is best to size the box depth accurately for your intended contents.

Should I test the slit lock with my chosen board?

Yes. The friction fit of the tongue depends heavily on the board caliper. Testing a physical sample ensures the tongue slides in smoothly without tearing the corners of the slit.

How much space do these boxes take up before packing?

Because they are glued and shipped flat, they take up minimal pallet space compared to pre-assembled rigid boxes, making them easy to store until needed.