Raised Box Fold (Over-filled Box Pleat)

Machine types that can knit it

• Single bed (punch card) + ribber
• Single bed (electronic) + ribber
• Double bed with pushers (Passap type)
• Double-bed hand flat (V-bed)

The full card

What it looks like

Narrow vertical fins or blocks standing up off the surface, with the flat area between them pinched short. The look is ribbed relief with tall raised strips. Each raised strip casts a strong side shadow. [KB inference] It is a strong candidate for raised parallel bars (e.g. black piano keys standing above a white base, or radiator fins).

How it behaves

The pleat stands on its edges because the flat portion is too short to hold it down. It acts more like a 3D folded form than a pleat.

How it works

A box-pleat layout with B > A/2, often with A reduced, so the folded material exceeds the base it would lie on.

Machines

As for the box pleat.

Parameters

Ratio B/A ≥ ~0.7 (test it), F = 4. Fin height ≈ B·stitch_width. Fin spacing ≈ A.

Steps

As for the box pleat, but with B enlarged. Swatch 2 repeats first, then steam-set the fins upright. A dense, elastic, or thermoplastic plating yarn holds them up.

Charting

As for the box pleat. Annotate "B > A/2: standing".

Limits and common problems

The fins flop in loose yarn. Bulk is heavy at the fold bands. Large fins collapse under their own weight (see scaling).

Combines with

vertical-accordion-pleat (as a plain base), colour-in-folds (plating shows at the fold bands).

Pieces and assembly

Knit as one panel. Mount the fins upright by seaming the base to a backing; do not stitch through the fins.

Related techniques

• Vertical Accordion Pleat
• Integrated Knife Pleat
• Integrated Box Pleat
• Right-triangle transfers (knife pleat)
• Horizontal Transfer Fold (Accordion)
• Diagonal-boundary chevron transfers