Monday, 3 August 2009

Warp Knitting | Atlas Construction

The specialty of the atlas constructions is that the laps are continued over two or more courses in one direction and after a turning course the laps return in opposite direction to the starting point.
The characteristic of the atlas construction is the inclination of the loop heads which changes from turning course to turning course. The stripes formed in this way depend in width on the number of stitches between the turning points and the adjusted number of courses (cpi).
The Atlas is said to be open if the loops between the turning points are open. In case of a closed atlas construction, the loops between the turning points are closed.
The turning courses can be open or closed.
The number of courses from turning course to turning course is most important for the fabric appearance and has to be indicated in the binding description.
The repeat of a 4-row Atlas construction includes 8 courses whereby the stitches of 4 rows at a time incline alternately to the left and to the right. Half of the repeat of the Atlas construction is also called the mirror.The open Atlas belongs to the lightest warp knitted fabrics and is more often worked than the closed Atlas construction.

4-row Atlas, closed, turning points open:
repeat in length = 8 courses
yarn parts per repeat = 24


























4-row Atlas, open, turning points closed:
repeat in length = 8 courses
yarn parts per repeat = 24















3-row back-lapped Atlas, closed, turning points closed:
If the lapping of the Atlas is changed to displace during the underlap motion by one needle gap more, similar to the 2 x 1 stitch, the Atlas is called a back-lapped Atlas construction.
Owing to the elongated underlap this back-lapped Atlas is about 1/3 heavier than the normal one.


repeat in length = 6 courses
yarn parts per repeat = 24


3-row back-lapped Atlas, open, tuning points closed:
repeat in length = 6 courses
yarn parts per repeat = 24




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