Method of making sewn patterns with sewing machines

Details Method of making sewn patterns with sewing machines Method of making sewn patterns with sewing machines

1991-07-31

1992-12-08

Nerbun, Peter

Sewing

Elements

Frames

112439, D05C 1700

Patent

active

051688220

ABSTRACT:
Elementary patterns are sewn in a sewing machine wherein the work can be fed by increments T. The making of a pattern involves repeatedly moving the work in and counter to the feed direction between starting the final needle penetration points which are spaced apart a distance nT wherein n is a whole number exceeding one. This results in the making of several continuous thread legs each having a length nT which can exceed, at least slightly, the maximum bight range of the needle and each extending all the way between the starting and final penetration points. In order to form a second elementary pattern which intersects the first pattern, the work is fed to move the needle to an intermediate penetration point, for example, midway between the starting and final penetration points, and the work is then fed to position the needle at the starting penetration point of the second pattern. One or more stay stitches are formed at the starting and/or final penetration point of each elementary pattern in order to increase the amount of thread in the pattern and to reduce the likelihood of deformation of the work under the action of tensioned thread legs.

REFERENCES:
patent: 4177744 (1979-12-01), Wurst et al.
patent: 4309950 (1982-01-01), Franklin
patent: 4391215 (1983-07-01), Sansone
patent: 4561369 (1985-12-01), Meier
patent: 4599959 (1986-07-01), Sano et al.
patent: 4892050 (1990-01-01), Ando et al.

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