Understanding Double Jersey Weft Knitted Structures

Weft knitted fabrics are classified based on the number of needle beds used and the loop structure. Double jersey fabrics are constructed using two sets of needles (or a single needle cylinder with an internal dial, or two separate needle beds) working simultaneously. This construction results in fabrics that typically do not curl at the edges and have different face and back structures or a stable structure on both sides.

Analysis of Weft Knitted Structures

The question asks to identify the double jersey structures from the given options:

• Rib: Rib structures are typically formed on two sets of needles, creating vertical wales on both the face and back of the fabric. This is a characteristic double jersey structure.
• Interlock: Interlock knitting is a development of the rib structure, also using two needle sets. It produces a stable, non-curling fabric with the same appearance on both sides, making it a type of double jersey.
• Single cross tuck: This structure involves tuck loops (miss loops) formed on a single set of needles, characteristic of single jersey fabrics. It is not a double jersey structure.
• Eight lock: Eight lock knitting creates a dense, stable fabric using two sets of needles, often described as a complex double jersey structure.

Identifying Double Jersey Structures

Based on the analysis, the following are classified as double jersey structures:

• Rib (Option A)
• Interlock (Option B)
• Eight lock (Option D)

Therefore, the correct options are A, B, and D.