US3042336A

US3042336A - Packaging wire

Info

Publication number: US3042336A
Application number: US10828A
Authority: US
Inventors: Frederich B Krafft; Frank K Roberts
Original assignee: Anaconda Wire and Cable Co
Current assignee: Anaconda Wire and Cable Co
Priority date: 1957-03-27
Filing date: 1960-01-22
Publication date: 1962-07-03
Anticipated expiration: 1979-07-03

Description

July 3, 1962 F. B.- KRAFFT ETAL 3,042,336

PACKAGING WIRE.

2 Sheets-Sheet 1 Original Filed March 27, 1957 INVENTORS FEDRI B. Hem-Fr Fe/uwr /'f. Eosaers ATTORNEYS July 3, 1962 F. B. KRAFFT ETAL 3,042,336

PACKAGING WIRE Original Filed March 27, 1957 2 Sheets-Sheet 2 INVENTORS FREDZ/C B. HR'AFF? Fem/K A. Roe RT$ (2W 2W warm swa 7 ATTORNEY 5 United States Patent 3,042,336 PACKAGING WIRE Frederich B. Kratft and Frank K. Roberts, Muskegon,

Mich, assignors to Anaconda Wire and Cabie Company, a corporation of Delaware Original application Mar. 27, 1957, Ser. No. 648,935, now Patent No. 2,959,279, dated Nov. 8, 1960. Divided and this application Jan. 22, 1960, Ser. No. 10,828

9 Claims. (Cl. 242-83) This invention relates to the packaging of magnet wire in containers, and more particularly it relates to a method and apparatus for laying a continuous length of wire in a succession of multi-turn coils eccentrically within an annular cylindrical container. This application is a division of our co-pending application Serial No. 648,935, filed March 27, 1957, now Patent No. 2,959,279.

In recent years, wire manufacturers have been packaging and shipping small diameter magnet wire in drums or barrels containing very long lengths of such wire. Such packaging heretofore has simply involved laying the wire in a single large coil, or laying it in the form of a succession of superposed flat spiral coils in an annular container. Packaging wire in this fashion has proved very satisfactory for heavy packages containing several hundred pounds of magnet wires of the larger sizes (say No. 22 A.W.G. or larger), but has been relatively unsatisfactory for the small sizes (e.g. No. 24 A.W.G. and smaller), for which a package of one hundred pounds is very large.

The present invention provides an improved method and apparatus which is especially suited to producing such package of the fine sizes of magnet wire. Such packages may be in small pails of approximately one hundred pounds each. The invention provides for a unique disposition of the magnet Wire in the pail which effectively prevents snarling or tangling of the wire even though the pail may be subjected to severe jostling in transit. The improved method of producing such a package, and the apparatus necessary to carry out the method are each contemplated by this invention,

Such a package is produced, in accordance with the invention, by rotating the container and feeding the wire into it at a linear velocity less than the peripheral velocity of the container. The wire is delivered into the container at a point lying between the inside surface of the container cylinder and a cylindrical axial zone of substantial radius (the space occupied by the container core). The point of delivery of the wire is oscillated through a path lying between the inside surface of the container cylinder and the axial zone, such oscillation being at a frequency equal to the frequency of rotation of the container throughout a large number of rotations of the container. eriodically, however, the frequency of oscillation is altered to a value substantially different from the frequency of rotation of the container for a time which preferably is substantially less than that required for one full rotation of the container (but which may be for any time different from that required for one or more complete rotations, from a fraction of one complete rotation to a fraction more than several complete rotations). As a result, successive multi-turn coils of wire are laid in the container eccentrically both with and a capstan shaft 17.

ice

respect to the container and with respect to the adjacent coils.

The apparatus designed to carry out the manufacture of a package according to this method includes a rotatable table adapted to support and axially rotate the annular container at constant angular velocity, and a capstan adapted to deliver the wire to the container at constantlinear velocity. A wire guide is provided to direct the wire from the capstan to a point within the annular container. In order to oscillate this point of delivery as required by the method of the invention, oscillating means are connected with the guide to move it back and forth at a frequency of oscillation equal to the frequency of rotation of the container. A motor is connected in driving engagement with the table and the capstan, and means are provided which normally hold the oscillation of the guide in positive synchronization with rotation of the table. Further means are included for periodically altering the frequency of oscillation of the guide to a value substantially different from the frequency of rotation of the table for a time which preferably is substantially less than that required for one full rotation thereof.

Preferred embodiments of the apparatus of the invention, and the best mode of carrying out the method of the invention, are described below with reference to the accompanying drawings, wherein- FIG. 1 is a schematic illustration of an advantageous embodiment of apparatus according to the invention;

FIG. 2,is a horizontal sectional view of a package of wire produced in accordance with the invention; and

FIG, 3 is an elevation, partly broken away, of the package of wire.

Referring first to FIG, 1, the apparatus includes a rotatable table 1 upon which a cylindrical container 2 is mounted. The container 2 has a cylindrical wall 3 and a cylindrical core 4 to each of which a closing base member 5 (seen in FIG. 3) is attached at their lower ends. The wall 3 and core 4 are concentric and coextnesive and thus define an annular container space 6 between them. Rotation of the table 1 is positively effected by a motor 7 through a horizontal shaft 8, bevel gears 9, a vertical shaft 10 and a pinion 11. The pinion 11 meshes with a spur gear 12 on the table 1. A capstan 13 cooperates with a freely rotatable follower 14 to advance the wire 15 to the container at a linear velocity less than the peripheral velocity of the container. The capstan is also positively driven by the motor 7 through bevel gears 16 Immediately after leaving the capstan, the wire travels into a wire guide 18 comprising a length of tubing mounted at the end near the capstan on a pivot 19. The opposite end of the guide is bent slightly downwardly over the container, to direct the wire into the annular container space 6.

The point ofdelivery of the wire into the annular space 6 is substantially radially oscillated by oscillating the feeding guide 18 in a horizontal plane about the pivot 19. This is accomplished by linking the guide tube to a crank wheel 20 bye. connecting rod 21. Upon rotation of a shaft 22 on which the crank wheel 20 is secured, the guide 18 will, of course, oscillate sinusoidally. Positioned on the shaft 22 is a clutch 23 which may be disengaged by a clutch fork 24 actuated by a solenoid 25 relative to the axis of the container.

through a plunger 26. The plunger 26 is urged to the left, as viewed in the drawing, by a compression spring 27, so that the clutch 23 is engaged. With the clutch 23 engaged, positive rotative power is transferred to the shaft 22 from the motor 7 through bevel gears 28 and spur gears 29.

The frequency of oscillation of the guide 18 may be altered by transferring the rotative power from motor 7 through spur gears 30, an auxiliary shaft 31, a spur gear 32, and a pinion 33, rather than through the clutch 23. In the illustrated embodiment, the frequency of oscillation of the guide 18 is increased relative to the frequency of rotation of the container 2 when power for oscillating the guide is transmitted through the auxiliary shaft 31, due to the small diameter of the pinion 33 relative to the spur gear 32. However, the apparatus could function with equal effectiveness with this ratio reversed, thus causing a substantial reduction, rather than increase, in the frequency of oscillation of the guide 18.

A second clutch 34 is included on the shaft 31 and is also operated by the solenoid 25 through the clutch fork 24. This second clutch, however, is normally in a disengaged condition, as shown. It will be seen, therefore, that the rotative power from the motor 7 is normally transmitted through the first clutch 23, to drive the crank wheel 20 at a normal frequency, but that upon actuation of the solenoid the clutch 23 is disengaged and the clutch 34 is simultaneously engaged so that the crank wheel 20 is driven at a substantially different frequency.

It should be further noted that the apparatus will also function effectively if the oscillation of the feeding guide is periodically stopped, rather than varied as described above. This may be accomplished by disconnecting the auxiliary shaft entirely (for example, by removing spur gears or 32) and simply disengaging the clutch 23, thereby interrupting the transfer of power through the shaft 22.

It is intended that the guide 18 oscillate uniformly throughout a large number of rotations of the container,

at a frequency equal to the rotative frequency of the container (i.e. one complete cycle of oscillation of the guide for each complete revolution of the container),

but that such frequency of oscillation be periodically altered for the time necessary for the container to rotate through an angle of, say, 45 to \60 (though this angle may well be extended to wider limits). It is desirable that such periodic alteration in frequency be commenced when the point of delivery of the wire into the container is midway through its path of oscillation. Therefore, a

trip 35 is located on the crank wheel 20 to impart one ratus, the container 2 is rotated on the table 12 at constant angular velocity, and the wire 15 is delivered in to it by the capstan 13 at a constant linear velocity. The guide tube 18 oscillates at a frequency equal to the frequency of rotation of the container as it directs the Wire into the annular space .6. The position of the point of delivery of the wire in its path of oscillation is immaterial at the start ofthe coiling operation, and the end of the wire may be left loose and unattached.

As the feeding guide 18 oscillates it lays the wire 15 on the bottom of the annular space 6 in a substantially circular coil A, as seen in FIGS. 2 and 3, eccentrically The coil builds up in a number of substantially superimposed turns until the counter actuated switch 36 activates the solenoid 25.

trically both with respect to the container and with re- The oscillation of the guide 18 is thereby altered to a different frequency for a brief period (a period equal to 60 rotation of the container in order to produce the package shown in FIGS. 2 and 3) as the wire continues to be delivered at constant linear velocity. The wire 15 therefore departs fro-m coil A and commences to fall in a second coil B.

It will be seen that the coil B is eccentric to coil A and is in contact therewith only at points B and B". A number of substantially superimposed turns are similarly laid in coil B until the counter actuated switch 36 once again briefly alters the frequency of oscillation of the guide 18. The wire 15 will depart once more from its coil for a brief period and proceed to lay a third coil C over the coil B. The coil C will be eccentn'cally disposed relative to each of the coils B and A. The operation continues as coils D, E and F are successively laid down, and eventually the coil G will be formed approximately directly over but considerably above coil A. Each of these coils is eccentric with respect both to adjacent coils and to the container axis.

Referring again to FIGS. 2 and 3, the package of wire formed by the method and apparatus described hereinbefore includes the cylindrical wall 3- and the concentric co-extensive axial core 4. The bottom of the container closed by the base member 5, and the open top thereof is closed by a removable cover 38. The continuous length of wire is positioned Within the annular space between the wall 3 and the core 4 in a succession of substantially circular coils each occupying a successive level and nominally in contact with only the coils on adjacent levels. Advantageously 75 to turns of wire are laid down in each coil, and there may be several hundred to a thousand or more coils in the entire container. Each coil, as described, is disposed eccentn'cally relative to coils of adjacent levels and to the axis of the container.

While the foregoing discussion of this invention relates to its application in the packaging of magnet wire, it may readily be adopted with equal effectiveness in the coiling and packaging of several other forms of filamentary material. It is to be noted that the concept is by no means limited to materials (such as wire) which are rigid enough to be pushed through the guide tube by the capstan, since the feeding and oscillating apparatus could easily be positioned over the container with the guide tube substantially vertical and the material could be advanced downwardly by gravity. Hence twines, yarns,

threads, etc., can also be advantageously coiled according to this invention. In fact, in virtually any coiling operation where a long continuous length of easily tangled filament is to be packaged, this invention can be of great benefit.

We claim:

1. A method of packaging wire in a cylindrical container which comprises rotating said container, feeding a wire into said container at a linear velocity less than the peripheral velocity of said container, said wire being delivered into the container at a point lying between the inside surface of the container cylinder and a cylindrical axial zone of substantial radius, oscillating the point of delivery of said wire through a path lying between the inside surface of the container cylinder and said axial zone, said oscillation being at a frequency equal to the frequency of rotation of the container throughout a large number of rotations of the container, and periodically altering the frequency of said oscillation to a value substantially different from the frequency of rotation of the container for a time substantially less than that required for one full rotation of the container, whereby successive multi-turn coils of wire are laid in the container eccenspect to the adjacent coils.

2. A method of packaging wire in an annular container having a cylindrical Wall and an axial cylindrical core which comprises rotating said container, feeding a wire into said container at a linear velocity less than' the peripheral velocity of said cylindrical wall, said wire being delivered into the container at a point lying between the inside surface of said cylindrical wall and the outside surface of said cylindrical core, oscillating the point of delivery of said wire through a path lying between the inside surface of said cylindrical wall and the outside surface of said cylindrical core, said oscillation being at a frequency equal to the frequency of rotation of the container throughout a large number of rotations of the container, and periodically stopping said oscillation for a time substantially less than that required for one full rotation of the container, whereby successive multi-turn coils of wire are laid in the container eccentrically both with respect to the container and with respect to the adjacent coils.

3. A method of packaging wire in a cylindrical container which comprises rotating said container, feeding a wire into said container at a linear velocity less than the peripheral velocity of said container, said wire being delivered into the container at a point lying between the inside surface of the container cylinder and a cylindrical axial zone of substantial radius, oscillating the point of delivery of said wire through a path lying between the inside surface of the container cylinder and said axial zone, said oscillation being at a frequency equal to the frequency of rotation of the container throughout a large number of rotations of the container, and periodically altering the frequency of said oscillation to a value substantially different from the frequency of rotation of the container for a time equal to that required for rotation of the container through approximately 45 to 60.

4. A method of packaging wire in an annular container having a cylindrical wall and an axial cylindrical core which comprises rotating said container, feeding a wire into said container at a linear velocity less than the peripheral velocity of said cylindrical wall, said wire being delivered into the container at a point lying between the inside surface of said cylindrical wall and the outside surface of said cylindrical core, oscillating the point of delivery of said wire through a path lying between the inside surface of said cylindrical Wall and the outside surface of said cylindrical core, said oscillation being at a frequency equal to the frequency of rotation of the container throughout a large number of rotations of the container, and periodically stopping said oscillation for a time equal to that required for rotation of the container through approximately 45 to 60.

5. A method of packaging wire in an anular container having a cylindrical wall and an axial core which comprises continuously rotating said container at a constant angular velocity about its vertical axis, delivering said wire into said container at a constant linear velocity approximately equal to the velocity of a point on the mean diameter of said annular container, said wire being delivered into the container at a point between the inside surface of said cylindrical wall and the outside surface of said cylindrical core, osclllating said point of delivery back and forth across the annular portion of said container, synchronizing the period of said oscillation with the period of rotation of said container and maintaining it thus synchronized throughout a large number of rotations of the container, thereby laying a succession of turns of wire in a substantially circular coil eccentrically within said annular container, and periodically brefly altering the frequency of said oscillation while maintaining said constant angular velocity of rotation of said container and said constant linear velocity of delivery of said wire, thereby periodically laying a new coil eccentrically relative to both the container and to the preceding coils.

6. A method of packaging wire in an annular container having a cylindrical wall and an axial core which comprises continuousuly rotating said container at a constant angular velocity about its vertical axis, delivering said wire into said' container at a constant linear velocity approximately equal to the velocity of a point on the mean diameter of said annular container, said wire being delivered into the container at a point between the inside surface of said cylindrical wall and the outside surface of said cylindical core, oscillating said point of delivery substantially radially across the annular portion of said container, synchronizing the period of said oscillation with the period of rotation of said container and maintaining it thus synchronized throughout a large number of rotations of the container, thereby laying a succession of turns of wire in a substantially circular coil eccentrically within said annular container, and periodically briefly stopping the frequency of said oscillation while maintaining said constant angular velocity of rotation of said container and said constant linear velocity of delivery of said wire, thereby periodically laying a new coil eccentrically relative to both the container and to the preceding coils.

7. Apparatus for packing wire in an annular container having a cylindrical wall and an axial core comprising a rotatable table adapted to support and axially rotate said container at constant angular velocity, a capstan adapted to deliver said wire to said container at constant linear velocity, a wire guide adapted to direct said wire from said capstan to a point within said annular container, means for oscillating said guide at a frequency equal to the frequency of rotation of the container, whereby the point of delivery of said wire moves through a path lying between the inside surface of said cylindrica-l Wall and the outside surface of said axial core, a motor in driving engagement with said table, capstan and oscillating means, means normally holding the oscillation of said guide in positive synchronization with rotation of said table, and means for periodically altering the frequency of: oscillation of said guide to a value substantially dilferent from the frequency of rotation of the table for a time substantially less than that required for one full rotation thereof.

8. Apparatus for packaging wire in an annular container having a cylindrical wall and an axial core comprising a rotatable table adapted to support and axially rotate said container at constant angular velocity, a can stan adapted to deliver said wire to said container at constant linear velocity, a wire guide adapted to direct said wire from said capstan to a point Within said annular container, means for oscillating said guide at a frequency equal to the frequency of rotation of the container, whereby the point of delivery of said wire moves through a path lying between the inside surface of said cylindrical wall and the outside surface of said axial core, driving means in driving engagement with said table, capstan and oscillating means, means normally holding the oscillation of said guide in positive synchronization with rotation of said table at the value of one complete cycle of oscillation of the guide for each complete rotation of the table, and means for periodically completely disconnecting said motor from driving engagement with said oscillating means for a time substantially less than that required for one full rotation of the container.

9. Apparatus for packaging wire in an annular container having a cylindrical wall and an axial core comprising a rotatable table adapted to support and axially rotate said container at constant angular velocity, a capstan adapted to deliver said wire to said container at constant linear velocity, a wire guide adapted to direct said wire from said capstan to a point within said annular container, means for oscillating said guide at a frequency equal to the frequency of rotation of the container, whereby the point of delivery of said wire moves through a path lying between the inside surface of said cylindrical wall and the outside surface of said axial core, a motor in driving engagement with said table, capstan and oscillating means, means normally synchroguide at a frequency substantially diiferent from the frequency of rotation of the container.

References Cited in the file of this patent UNITED STATES PATENTS Morgan Jan. 19, Johnson Feb. 26, Furst Oct. 29, McDonald Oct. 11,

Wilhelm Nov. 8,

UNITED STATES PATENT OFFICE CERTIFICATE OF CCRRECTION Patent No. 3,042,336 July 3, 1962 Frederich B. Krafft et a1.

It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below Column 2, line 39, for "coextnesive" read coextensive ,3

column 5, line 74, for continuousuly" read continuously column 6, line 20, for "packing" read packaging column 8, line 6, for "334,435" read 334,453

Signed and sealed this 30th day of October 1962.

(SEAL) Attest:

ERNEST w. SWIDER DAVID LADD Attesting Officer Commissioner of Patents