Purlbed

Jacquard (Fair Isle) › Single-bed jacquard (floats at the back)

Elongation / double length

The motif appears twice as tall. Every card row is knitted twice, so the pattern looks smoother vertically and compensates for squashed Fair Isle proportions.

Machine types that can knit it

Demo swatch

Drawn for: Single bed, punch card
Approximate preview worked out from the bed chart, not a photo.The colours are the point here: the preview shows the pattern, and the fabric itself lies flat.
Bed chart
1102030→←→←→←→←→←→←→←→←→←→←→←→←→←→←→←→←→←→←Front bed1 square = 1 stitch × 1 row · read from the bottom · Single bed, punch card, 48 needles
Needle notation, first steps
1. Rows 1–36: knit 36 rowsStocking stitchcarriage →bedShowing needles L12–R12 of 48; repeat across the working area.
Punch card, first 24 stitches

The full card

What it looks like
The motif appears twice as tall. Every card row is knitted twice, so the pattern looks smoother vertically and compensates for squashed Fair Isle proportions.
How it behaves
As the base stitch.
How it works
On machines with an intermittent card-feed position, the card advances on one direction of travel only (KH-891: card rotates only when the K carriage moves right to left). The same selection is used for two rows.
Machines
Built in: KH-830 (intermittent feeding lever in service manual), KH-836 ("expand pattern two times"), KH-891, KH-260 (long-triangle lever position), some SR models. KH-821: no. [inference, high] Workaround [inference]: toggle the card lock lever by hand, locked for one pass and rotating for the next, or punch each row twice on the card.
Parameters
×2 only. Tuck/slip stacks double in height, so the vertical limits halve (e.g. ≤ 2 card rows of stacked tuck). 1. Carriage on the right. 2. Before each left-to-right pass, set the lock lever to ● (the same row is reselected). 3. Before each right-to-left pass, set it to rotate. 4. Or simply punch a doubled card.
Card design rules
If punching a doubled card, the card length doubles; check the 24-wide repeat still loops properly.
Charting
Draw the design rows once and mark "×2 rows". On the card, each design row appears as 2 identical rows.
Limits and common problems
Forgetting a toggle shifts the pattern by one row. Doubling tuck rows breaks the 4-row limit.
Combines with
Fair Isle (aspect correction), mosaic, tuck (carefully).

Written in our own words from machine manuals, knitting references and swatching. Knit a test swatch before a whole piece.

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