PurlbedPleats and folds › Vertical pleats
Right-triangle transfers (knife pleat)
Rows of sawtooth triangles; fabric falls into knife pleats with a patterned surface; very springy. One edge of each triangle fixed; the other edge moves one stitch every row, then resets.
- Two beds
Machine types that can knit it
Demo swatch
Drawn for: Double-bed hand flat (V-bed)Approximate preview worked out from the bed chart, not a photo.
Steps
- Set base bed map.
- Each row, transfer the moving-edge stitch to the other bed.
- At apex, reset the block.
- Repeat.
The full card
- What it looks like
- Rows of sawtooth triangles; fabric falls into knife pleats with a patterned surface; very springy.
- How it behaves
- pleat (knife), bouncy; horizontal or vertical depending on orientation.
- How it works
- One edge of each triangle fixed; the other edge moves one stitch every row, then resets.
- Machines
- Double bed; single transfer tool.
- Parameters
- triangle base T, height = T·rows-per-step, orientation, slope.
- Steps
- 1) Set base bed map. 2) Each row, transfer the moving-edge stitch to the other bed. 3) At apex, reset the block. 4) Repeat.
- Charting
- 1 cell = 1 st × 1 row; staircase triangles grey on white.
- Limits and common problems
- as chevron-fold.
- Combines with
- chevron-fold.
- Pieces and assembly
- Pleats lie in one direction—orient pieces consistently.
Written in our own words from machine manuals, knitting references and swatching. Knit a test swatch before a whole piece.