Loops in warp knitting are called laps. There are two types of laps: over laps, where the yarn wraps around the needle, and under laps, the length of yarn connecting loops. Overlaps are formed through shogging and sewing motions, while underlaps connect two successive overlaps. The main lap variations are closed laps with overlaps and underlaps in opposite directions, open laps with overlaps and underlaps in the same direction, laying-in with only underlaps, and miss lapping with neither overlaps nor underlaps.

1. LAPS OF WARP KNIT MACHINE
PRESENTED BY:
MD: FAHIMUZZAMAN
TE-14025
DEPARTMENT OF TEXTILE ENGINEERING
MAWLANA BHASHANI SCIENCE AND TECHNOLOGY UNIVERSITY

2. WHAT IS LAP?
Loops are termed as laps in warp knitting because warp guide laps their yarn
around the needle in order to formed the loops structure.

3. TYPES OF LAPS
Laps
Overlaps Underlaps

4. OVER LAPS
• Warping the yarn around the needle
is called over lap. It is done by
shogging and sewing motion.

5. UNDER LAPS
Length of yarn connecting the loops is
called underlap Or two successive over
lap connected by the yarn , that length of
yarn is called underlap.

6. BASIC OVERLAP AND UNDERLAP VARIATION

7. CLOSED LAP
An overlap followed by an
underlap in opposite direction

8. OPEN LAPS
AN OVERLAP FOLLOWED BY AN
UNDERLAP IN THE SAME DIRECTION ONLY OVERLAP NO UNDERLAPS

9. LAYING-IN
Only underlaps no overlaps

10. MISS LAPPING
Neither overlaps nor underlaps