Flat knitting machine capable of changing stitch density

Details Flat knitting machine capable of changing stitch density Flat knitting machine capable of changing stitch density

1982-05-27

1985-04-16

Feldbaum, Ronald

Textiles: knitting

Independent-needle machines

Straight

66 78, D04B 700

Patent

active

045107750

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

The present invention relates to a flat knitting machine capable of changing the stitch density. More specifically, the present invention relates to a flat knitting machine in which the size of loops of a knitted fabric can appropriately be changed in optional courses or wales and knitting is performed by appropriately changing the length in piles or combining them with misses, whereby optional changes can be given to the knitted fabric.


BACKGROUND ART

As means for appropriately changing the size of loops of courses in the flat knitting operation, there is known an apparatus in which amonng knitting cams of a flat hosiery knitting machine, loop size-changing knitting cams are disposed on both the sides of a raising cam, respectively, each of these, loop size-changing, knitting cams is formed into left and right parts so that the position can be changed, and the loop size-changing knitting cams act on higher and lower butts of latch needles or jacks independently to change the size of loops of the respective latch needles or jacks independently. In this known apparatus, the pattern of the knitted fabric is determined according to arrangement of latch needles or jacks of lower and higher butts in a needle groove, and in order to change this pattern, it is necessary to change vertical arrangement of butts of the latch needles or jacks.


DISCLOSURE OF THE INVENTION

The apparatus of the present invention comprises a needle selector for dividing needles or jacks to be raised to the tucking or knitting position into two groups, a select jack presser for locating one group of the needles or jacks at the lower butt position through a select jack, and knitting cams including a knitting cam for higher butts and a knitting cam for lower butts. The latch needles to be raised to the knitting or tucking position are divided by the needle selector into one group of needles for forming stitches of a large size and the other group of needles for forming stitches of a small size, and one group of the needles are pushed down to the lower butt position by the select jack presser. When both the knitting cams for higher and lower butts are brought down, the knitting cam for lower butts is located at a position higher than the position of the knitting cam for higher butts and the quantity of lift-up of needles corresponding to the lower butts is made smaller than the quantity of lift-up of needles corresponding to the upper butts, whereby the size of loops in one group of the needles is made different from the size of loops in the other group of the needles. If this apparatus is used, since the size of loop can appropriately be selected for respective needles in forming respective courses of a knitted fabric, it becomes possible to provide an optional stitch density for an optional portion of the knitted fabric.
Accordingly, in a texture where transfer of stitches is necessary, for example, a cable fabric, if the size of loops is increased in the portion of this texture, a beautiful knitted fabric can be obtained without imparting a unnecessary tension to yarn.
Furthermore, in a fabric comprising rib stitches and plain stitches, if the size of rib stitches is reduced and the size of plain stitches is increased, a uniform stitch density can be produced throughout the entire knitted fabric.
Moreover, in forming a pile knitted fabric, if the size of loops is changed among pile stitches, the knit pattern can be accented and an eccentric knitted fabric can be obtained. More specifically, when knitting is performed by needles of one of paired needle beds and piles are formed by needles of the other needle bed, if the knitting cams are appropriately changed, the length of piles can optionally be chosen among long length, short length and miss.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a lay-out view of a needle cam selector actuator of a carriage, which is seen from the lower face of the carriage.
FIG. 2 is a view showing the longitudinal section of a needle bed.
FIG. 3 is a partially cut-out top plan view sho

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