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Патент USA US3046778

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July 31, 1962
3,046,768
F. BARTON
TWO BY TWO RIB KNIT FABRIC
Filed July 22, 1959
2 Sheets-Sheet 1
i10.5s
INVENTOR.
Rani/Se! 134/7912
BY lad/M4 KW
July 31, 1962
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3,046,768
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3,0451%
United States Patent
Patented July 31, 1982
2
1
of the invention, will be apparent in the following detailed
description of a fabric embodying the same and of the
3,046,768
'
method of producing such fabric, which description is to
be read in connection with the accompanying drawing
forming a part hereof, and wherein:
TWO BY TWO RIB KNIT FABRIC
Frantisek Barton, Brno, Czechoslovakia, assignor to
Sdruzeni podniku textilniho strojirenstvi, Chrastava,
Czechoslovakia
FIG. 1 is a diagrammatic View illustrating a run-proof
edge formed of two courses having the loops thereof
formed alternately and being interlaced or wound around
Filed July 22, 1959, Ser. No. 828,87?
Claims priority, application Czechoslovakia July 25, 1958
1 Claim. (Cl. 66-172)
each other at one side of each loop;
'
FIG. 2 is a diagrammatic view illustrating a run-proof
The present invention relates to a selvaged two by two 10 edge formed of two courses having the loops formed
rib knitted fabric having a run-‘proof edge and which can
alternately and being interlaced or wound around each
be produced on a conventional circular knitting machine
other at both sides of the loops;
having two banks of needles, that is, dial needles and
FIG. 3 is a diagrammatic view illustrating a run-proof
cylinder needles, without requiring racking of the dial
edge formed of two courses with the loops thereof formed
- needles relative to the cylinder needles.
'
cross-wise and being interlaced or wound around each
Heretofore, it has been the usual practice to provide
other at both sides of the loops;
a run-proof edge for a two by two rib knitted fabric '
FIG. 4 is a diagrammatic view illustrating a run-proof
produced on a circular knitting machine by racking the
edge formed of two courses with the loops thereof formed
dial needles relative to the cylinder needles which causes
cross-wise and being interlaced at only ‘one side of the
the locking of the loops along the edge of the rib knitted
loops; and
fabric. This racking of the dial needles, which are re
turned to their original positions after the formation of
the ?rst few courses at the start of knitting selvages on
rib knitted fabrics, is the cause of substantial di?iculties
FIG. 5 is a diagrammatic view showing two pieces of
knitted fabric and the run-proof edge provided on the
two by two rib knitted selvage of one of the pieces as
in FIG. 1.
encountered in both the design and operation of multiple 25
Referring to the drawing in detail, and initially to
feed circular knitting machines. More speci?cally, rack
FIG. 1 thereof, it will be seen that the run-proof edge
ing of the dial needles results in the slowing down of
embodying the present invention, as there illustrated, is
production, the necessity for accurate and intricate ad
formed from two threads m and n. The needles of one
justment of the machine, and the unnecessary waste of
material during production.
30
In view of the foregoing, circular knitting machines
have been recently designed in which one bank of needles
is not shifted, and the run-proof edge is formed through
the use of the ‘full number of needles at the front and a
bank are indicated at a, b, c and d and are arranged in
pairs with sinkers s between the successive pairs of
needles, while the needles of the other bank are indicated
at A, B, C, D, E and F and are also arranged in pairs
with sinkers S between the successive pairs of needles.
The thread mvis laid on needles A, a, b, _C, c and d,
2:1 division of the needles at the back, while the in
while the other thread n is laid on needles B, b, D and d.
dividual loops formed at the front are overhung to pro
The threads in and n are knitted in by casting the thread
duce two by two ribs. in another proposed design, as
m off the needles b and d onto the loops of the thread
disclosed in British Patent No. 773,546, both the dial
11, so that the two threads m and n are interlaced olr
and cylinder needles operate with a 2:1 ratio, and a sim
wound around each other at each of the points V, that is,
ple single row of locking loops in knitted with one needle 40 at one side of each of the loops, and eyes or loops 0 are
of each of the successive pairs of needles in the cylinder
formed of the thread n.
~
and dial banks of needles.
Either a one by two rib row
or, if required, so-called single face rows, are attached
It ‘will be apparent that, in FIG. 1, the loops of the
thread m are formed by the ?rst needles of each pair
to the locking loops for completing the edge. In the
of needles, that is, by the needles A, a, C, c and E, while
?rst case, that is, where the edge is knitted with all of 45 the loops of the thread n are formed by the second needle
the cylinder needles and with a 2:1 ratio for the dial
of each pair of needles, that is, by the needles B, b, D,
needles, a special apparatus is required to cause over
d and F. Thus, in FIG. 1, the loops of the two threads
hanging of the individual front loops formed by the cylin
or courses are formed alternately and are interlaced or
der needles and further the selvage is increased in width
wound around each other during each transfer of the
due to the loosening of the loops in the run-proof edge. 50 threads from the needles of one bank to the needles of
In the second case, that is, in the machine as disclosed
the other bank.
in British Patent No. 773,546, an exceedingly loose sel
The run-proof edge illustrated in FIG. 2 is also pro
vage is formed by reason of the excessively loose binding
duced from two threads m and n which are alternately
of the run-proof edge and of the following row.
laid on the needles of the two banks of needles, but with
In accordance with the present invention, a run-proof 55 the two threads being interlaced or wound around each
edge is provided for a two by two ribknitted selvage
other twice during each transfer of the threads between
which corresponds to a conventional run-proof edge for
the needles of the two banks. Thus, in FIG. 2, the thread
a ?at knitted fabric, and which is shifted without rack
m is laid on all of the needles A, B, a, b, C, D, c, d and
ing of the bed or dial needles, and therefore without the
E, while the thread It is laid only on the needles B, b, D,
previously mentioned di?iculties resulting from the rack 60 d and -F. The threads m and n are knitted in by casting
ing. The run-proof edge, contrary to that in previously
off or pressing the thread m from the needles B, b, D and
formed selvages, consists of two courses the loops of
d so that the threads m and n are interlaced or wound
which are formed either alternately, that is, by the ?rst
around each other at the points V, that is, at the opposite
needles of the front andrear pairs of needles, or cross
sides of each loop, and eyes or loops 0 are formed at
wise, that is, by the ?rst needle of the front pair of
both sides of each loop of the thread m, for example, by
needles and by the second needle of the rear pair of
the thread n on needles B and b and on needles D and d.
needles.
The loops of these two courses are interlaced
The run-proof edge illustrated in FIG. 3 is produced
or wound around each other, that is, disposed alternately
by laying the thread m on the needles A, a, b, C, c, d
at the top and at the bottom of the knitted fabric with
and E, 'while the thread n is laid only on the needles
the result that, in each course, one or two closed loops 70 B, a, D, c and F, with the thread m being cast or pressed
are formed to provide the basis for a run-proof edge.
off the needles a and 0 onto the thread n, so that the
The above, and other objects, ‘features and advantages
threads m and n are interlaced or wound around each
3,046,768
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7
Al
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other at each point V, that is, once during each transfer
After casting off the loops of the course 8, which loops
of'the threads between the needles of one bank and the
needles of the other bank, with eyes or loops being formed
knitting from the thread m of the course Z1 which is
are to be undone, a cam of the knitting machine causes ,
provided with simple loops by the needles A and C of the
bank of cylinder needles and with double loops by the
in ‘the thread n at the engagement of the latter with the.
needles a and c.
‘It will be seen that the thread m is
engaged by the ?rst needle in each pair of needles of
needles a, b, c and d of the bank of dial needles. A fur
one bank and with the second needle of each pair of
ther cam of the knitting machine then causes knitting
needles in the other bank, while the arrangement of the
from the thread n of the course Z2 which is provided
thread 11 with respect to the paired needles of both banks
with simple loops at the needles B ‘and D‘ of the cylinder
is the reverse of that indicated with respect to the thread 10 needles and at the needles I) and d of the dial needles.
m so that the threads m and n have the loops thereof
Casting off of the thread m from the dial needles b and d,
formed cross-wise in the embodiment of FIG. 3.
that is, casting off of one-half of each thedouble loops
_
The run-proof edge illustrated in FIG. 4 is also pro
provided in the thread m forming course Z1 onto the loops
duced from two threads m and‘ n having the loops thereof
provided in the thread n at the needles b and :2 provides
formed crosswise, but with both threads being inter 15 the required interlacing or winding around each other
laced or wound around each other twice during each
of the threads m and 12 forming the two courses Z1 and
transfer of the threads between the two banks of needles.
Z2 of the run-proof edge. After knitting of the run
More speci?cally, the thread m is placed on all needles
proof edge constituted by the courses Z1 and Z2, two
A, B, a, b, C, D, c, d, E and F, while the thread 11 is
‘ courses 9 and 10 of single-face stitches are knitted on the
laid only on the needles B, a, ‘D, c, and F, and the threads
front or cylinder needles, and a single course 11 of
are interlaced by casting or pressing’ off the thread m
single-face stitches is {knitted on the back or dial needles,
from the needles B, a, D, c and F, ‘with the result that
whereupon the courses 12 of rib stitches forming the two
the threads in and n are interlaced or wound around each
by two rib knitted selvage are produced. '
other at the opposite sides of each of the'loops formed
It is to be understood that the separating courses and
from the thread m, with loops or eyes 0 being formed 25 the knitting in of the two courses forming the run-proof.
in the thread n, for example, at the engagement of the
edge can also be effected, if required, at the other side of
thread n- with the needles B, a, ‘D and c.
7
the knitting machine from that illustrated in FIG. 5.
The edge embodying the present invention, as in any
Although illustrative embodiments of this invention’
one of FIGS. 1 to 4, inclusive, has the desired run
have been described in, detail herein with reference to '
resisting qualities because both of the threads m and n 30 the accompanying drawing, it is to be understood that the
from which the edge is formed are interlaced or wound
invention is not limited to those precise embodiments,
around each other, and the fact that both threads are
and that various changes‘and modi?cations may be ef
bent or looped imparts a considerable degree of elasticity
fected therein by one skilled in the art without departing
to the run-proof edge. The manufacture of the above
from the scope or spirit of the invention, except ‘as de?ned
described run-proof edge on a knitting machine having a 35 in the appended claim. '
full number or array of needles, for example, on an eight
I claim:
cam knitting machine, merely requires that such machine
A two by two rib knitted fabric of uniform yarn’
be capable of the alternate ranging of three types of
adapted to be produced .on a circular knitting machine
needles.
'
without racking of the dial needles relative to the cylinder
The separation of two successively produced pieces of
knitted fabric provided with a run-proof edge of the
kind illustrated in FIG. 1 can be effected, by way of ex
ample, in the manner illustrated in FIG. 5. More spe
cii?cally, after a piece of knitted fabric is ?nished with
the course K, courses 1 and 2 of plain single face clos
ing loops are knitted at the back, that is, on the dial
needles. Then two courses 3 and 4 of rib stitches are
knitted and the loops from the needles s at the back, that
is, dial needles, are cast off. Courses 5 and 6 ‘of closing
single-face stitches are then knitted at the front, that is,
on the cylinder needles, and, after knitting two separat
ing courses 7 and 8 of rib stitches, all loops or stitches
are cast off the cylinder needles. The front loops or
stitches in the courses 7 and 8 are undone, thereby leav
ing the completed piece of knitted fabric suspended by
the pulled out loops of the course 8 which remain en
gaged by the related dial needles.
40
needles; said fabric having a selvage including threads
forming ?rst and second courses of loops at the beginning
thereof, said ?rst and second courses having loops there
of alternatingly disposed at the front and back, respec_
tively, of the fabric with said threads forming the ?rst
and second courses being wound around each other at
least between the ?rst and second rows of loops at the op-.
posite faces, respectively, of the fabric to provide a run
proof edge, for the selvage.
References Cited in the ?le of this patent
UNITED STATES PATENTS,
72,696,095
2,847,838
2,854,832
Zieve ________________ .._ Dec. 7, 1954
Minton _____________ __ Aug. 19‘, 1958
Morris _______________ __ Oct. 7, 1958
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