US2518140A

US2518140A - Machine for manufacturing of fish nets and the like

Info

Publication number: US2518140A
Application number: US45182A
Authority: US
Inventors: Heggland Frithjof
Original assignee: KRISTIANSANDS FISKEGARNSFABRIK
Current assignee: KRISTIANSANDS FISKEGARNSFABRIK; Kristiansands Fiskegarnsfabrik AS
Priority date: 1947-05-10
Filing date: 1948-08-19
Publication date: 1950-08-08
Anticipated expiration: 1967-08-08

Description

Aug. 8, 1950 Filed Aug. 19, 1948 F. HEGGLAND 2,518,140 MACHINE FOR MANUFACTURING 01-" FISH NETS AND THE LIKE' 2 Sheets-Sheet l Aug. 8, 1950 F. HEGGLAND 2,518,140

MACHINE FOR MANUFACTURING OF FISH NETS AND THE LIKE 2 Sheets-s 2 Filed 19, 194B the frame of the machine.

which knotting of warp and weft by means of V hooks is effected immediately in front of a longitudinally slotted member, the shuttle during operation of the machine being reciprocated relatively to the slotted member through which the finished net is retracted. The machine is further characterized in that tightening of the weft, a loop of which has been placed around a loop of the warp, is effected during a step in which the shuttle is at rest with its end portion adjacent to the nose of the slotted member, and that said member and the shuttle are moved relative to each other along paths at a steep, preferably practically, right angle to each other, whereby the weft loop is tightened substantially at a right angle to the completed net.

In order that the invention may be better understood the same now will be described with reference to the accompanying drawings.

Figures 1, 2 and 3 diagrammatically illustrate the essential parts of a machine for producing nets;--the machine parts shown comprise a unit including one shuttle only, and accordingly produces only one series of knots. In actual practice a machine for manufacturing nets would comprise a great number of such units placed side by side and cooperating.

Said three figures illustrate three different operation steps.

Fig. 1 shows the step in which the weft thread has been drawn up in the form of a loop and the warp thread, in the form of a warp loop, ;is being .drawn through the weft loop.

Fig. 2 shows a step just after the weft loop hasbeen drawn, and the warp loop is in position to he slid over the shuttle.

. Fig. 3 shows the step in which the warp thread is being tightened and drawn under the shuttle.

. Fig. 4 shows, on a larger scale, the positions 1of the weft and warp loops in Fig. 1; and

Fig. 5 shows the position of said loops in Fig. 2. In Figs. 1, 2 and 3, the numeral I designates The frame carries rails or a table 2 on which reciprocates a carriage 3 supporting a shuttle 4 having a weft spool 5. The carriage 3 is reciprocated by means of an angular arm 6 having at one end a roller 1 which is guided by a cam disc 8.

On a shaft 9 is tiltably supported a member l0 carrying a fiat nozzle-like or longitudinally slotted member ll, through which slotted member the completed net I2 is drawn'to suitable storing cylinders (not shown) for the finished product. Member 10 also carries a guide l3 for the supply of warp thread [4 to the knotting location. The weft thread l5 from spool 5 is fed outthrough the shuttle 4.

The means provided for the formation of such loops as are necessary for producing knots adjacent tothe front edge of the member ll includes a hook 16 adapted to seize theweft and a hook I! adapted to seize the warp thread. In the drawings, said hooks are indicated only diagrammatically, without connection with any driving means therefor, since such hooks and their operative movements are well known in the art.

. The warp thread l4 ispassed over suitable guide -means,.such as rods l8 and IQ of circular cross section, attached to a tiltable arm 20 and over a similar rod 2| attached to a tiltable arm 22. Said

arms

20 and 22 may be tilted by any suitable means for tightening or slackening the warp thread when the machine is operating.

The member] 10 is tilted or. rocked 0n the shaft 9 by means of

links

23 and 24 and an arm 25. The arm 25 carries a roller 26 which operates on a cam disc 21 in such a manner that the member H and the guide [3 are raised and lowered as necessary during the operation of the machine.

With reference especially to Figs. 4 and 5 the formation of a knot for making a mesh will now be described.

In Figs. 4 and 5 the weft thread I5 is, as in Figs. l3, shown hatched, whereas the warp thread is illustrated by two parallel lines only.

After hook l6 has engaged the weft thread [5 and has pulled the latter upwards so that a Weft loop 28 has been formed,'hook l1 engages the warp thread and thus-causes formation of a warp 1oop'29, which is drawn through the Weft loop 28. In this position the weft thread 15 extending from the shuttle forms the loop 28, with portions of'the thread crossed at point 30 to form a half-hitch, and continues to the previously completed knot 32, the point 30 being the location along the weft thread from the knot 32 where the next knot isformed.

Thenext operative step now is to tighten the weft loop 28. In'machines of the defined type heretofore known, this has'been effected by reciprocating the shuttle to cause a stress in the weft thread l5 "in the direction indicated by an arrow 3|, whereby the knotting location is likely to be displaced along the warp loop 29, in the direction indicated by arrow 3|.

According'to the invention, this drawback is eliminated by holding the shuttle at rest, not reciprocating, during this step, but instead thereof, raising the knotting point 30 towards thehook 16,-as illustrated on Fig. 5, and tightening the'weft'loop 28'. By applying a stress in the direction indicated by arrow 33the weft loop 28 is, according to the invention, tightened, the stress acting'in the same linear direction as the general axis of the-weft loop 28. This prevents a displacementof the'knotting point 30 in the longitudinal direction'of the warp loop, and secures or maintains the correct distance between the preceding finishedknot 32 and the new knotting point' 30.

asfollows:

When hook is has engaged or hooked into the weft l5'a'nd formed-the'weft loop 28, simultaneously as the carriage 3 is moving towards the member ll, hook ll'is moved through the weft loop 28, engag'es the warp thread and forms the warp loop 29. 'Then the member I l and hook I6 swing up "to the position shown in Fig. 2, while the carriage 3 and shuttle 4 remain substantially stationary. Thus the, weft loop 28 is tightened, see Fig. 5,and at the Sametime the warp loop 29 is pulled out from the hook H and isslid over the end 34 lof' the shuttle 4;: By means of awheel 35, having-notches 36', the warp thread loop is moved under the shuttle 4, at the same time as thelower ends of arms 20' and 22 move away from each other, so that the warp 'is tightened and a knot is formedtrt-EHL I Due -to the fact'th'atthe memberll "and the guide l3 are situatedbna higher level than' the hon of the machine may briefly be described shuttle 4 when the warp loop 29 is drawn out, the

present construction gives the additional advantage that the warp loop takes an inclined position relatively to the shuttle and is readily slid over the shuttle end 34. In known machines the said loop first had to be passed over the middle portion of the back of the shuttle.

I claim:

1. In a machine for making knotted fish nets and other knotted nets from warp and weft threads, including a slotted member through the slot of which the net is retracted as formed, a shuttle carrying a weft thread, means for reciprocating the shuttle in a path toward and away from the net inlet portion of said slotted member during the operation of the machine, means for forming a loop in the weft thread extending from the completed net to the shuttle, means for forming and carrying a loop of the warp thread through the loop in the weft thread and around the shuttle, means for maintaining the shuttle in a stationary position with respect to reciprocation adjacent the vnet inlet of said slotted member while the warp loop is being carried around the shuttle, and means for effecting relative movement of the shuttle and the net inlet portion of said member in a direction at a steep angle with respect to the path of reciprocation of the shuttle, thereby tightening the weft loop around the warp loop.

2. A machine as claimed in claim 1, characterized in that said last-mentioned means includes means for effecting said relative movement during the movement of the warp thread through the weft loop.

3. A machine as claimed in claim 1, characterized in that said last-mentioned means includes means correlated with the means for reciprocating the shuttle and adapted to move the inlet portion of said member and the threads carried thereb in a direction at substantially a right angle to the path of reciprocation of said shuttle while the shuttle is in substantially said stationary position.

FRITHJOF I-IEGGLAND.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 809,611 Hammer Jan. 9, 1906 2,219,015 Nishiguchi Oct. 22, 1940