US2497511A

US2497511A - Direct spinning machine and method

Info

Publication number: US2497511A
Application number: US40209A
Authority: US
Inventors: Jr Charles Eugene Neisler
Original assignee: Individual
Current assignee: Individual
Priority date: 1948-07-23
Filing date: 1948-07-23
Publication date: 1950-02-14
Anticipated expiration: 1967-02-14

Description

Feb. 14, 1950 c H JR 2,497,511

DIRECT SPINNING MACHINE AND METHOD Filed July 23, 1948 IN VEN TOR.

Char/es Eugene Ne/s/el; Jr.

syg a ATTORNEY Patented Feb. 14, 1950 UNITED STATES PATE NT 'orrlca if? m mififfiififfl? 1Z1. Application Jill! 23,1948, Serial No. 40,209

4 Claims. (Cl. 57-.2)

My present invention relates to the production of spun rayon yarn from continuous rayon filaments.

In producing yarn from continuous filaments by the direct spinning process, it is desirable that the staple yarn fibers which are produced by rupturing the continuous filaments of the tow be as long as possible within practical limits. It is therefore an object of the present invention to provide a direct spinning machine which is operable to produce staple fibers of this character.

The above object of the invention and other objects ancillary thereto will be fully understood from the following description considered in connection with the accompanying illustrative drawmgs.

In the drawings, the single figure is illustrative of the machine and method of the present invention.

Referring to the drawings in detail, the machine comprises' the front roll II and a companion pressure roll l2 which are rotated at the same linear or peripheral speed, and a set of back rolls l4, l6 and I! which are rotated at the same linear or peripheral speed. The bundle or tow of continuous filaments, indicated at F, is drawn from a suitable supply (not shown) and passes between the back roll I! and the companion rolls l6 and I8, respectively, to and between the pair of front rolls It and i2. Said front rolls l and I2 are rotated at a substantially greater peripheral surface speed than rolls I4, l6 and i8 whereby the filaments are tensioned and ruptured into staple fibers.

In accordance with the present invention, the front roll it is considerably larger than the front roll of the usual direct-spinning machine, and means, preferably an endless flexible belt or web 20, is arranged to press the fibers against the peripheral surface of said roll. Said Ebelt 20 is preferably formed of soft leather similar to that used on long draft spinning machines and is held in juxtaposition to roll I by

guide pulleys

22, 24 and 25 which are non-driven but are free to rotate during the movement of the belt 20. It will be understood that the filaments of the tow are substantially parallel and that web 2. is wide enough to press the fibers against roll II for the full width of the tow. The pressure of belt 20 against the fibers on the roll IQ is not suflicient to break the filaments but is adjusted so that the fibers are held against the roll ll so that during the operation of the machine the rupture r 2 point P located between the bight between rolls I 4 and I8 and the point at which belt 2. passes between front roll Ill and belt roll 2|. Belt 2. is in operative peripheral engagement against roll III for about half of the circumference of said roll, substantially as indicated in the drawings, so that when the fibers pass between the front roll l0 and the companion pressure roll I! they are ruptured at about said point P. It will be readily understood that the filaments tend to break in the region indicated at P and hence the lengths of the fibers correspond substantially to the linear distance from the bight of rolls l0 and If to a point located between the bight of rolls I4 and i8 and the point at which belt 20 is held by roll 24 against front roll it. It will be understood that

belt rolls

24 and 26 may be mounted in any way for adjustment in order to adJust the pressure of said belt against the peripherally ex,- tending portion of roll 10. From the front rolls in and I2, the fiber staple passes to a spinning device 28, here shown as a cap spinner, but it will be understood that a ring spinning device, a fiyer spinning device, or anyother suitable spinning device may be used instead of the illustrated type of spinner.

In my application Ser. No. 640,727, filed January 12, 1946, now abandoned, I have shown a direct spinning machine in which the diameter of the front roll, which corresponds to the abovementioned front roll I0, is about 3". In the present case, the diameter of the front roll it is preferably about 6". It will be understood, however, that although this dimension is presently preferred, it is to be considered as illustrative but without limitation in respect to the diameter of said roll. Also, it will be understood that while I have shown only one set of front rolls and back rolls and a companion belt 20, the machine may be providedwith a. plurality-of sets of front and back rolls, companion pressure belts, respectively, 4

and companion spinning devices as illustrated in said prior application.

Various changes in the details of construction and in the arrangement of parts may be made in the above described machine without departing from the underlying idea or principles of this invention within the scope'of the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent, is:

1. In a machine for producing staple fibers from continuous filaments, said machine comprising two pairs of driven rolls which are operable to tension and rupture the filaments into of the filaments of the tow 1" occurs at about the II the staple fibers. while said filaments pass from one of said pairs of rolls to the other of said pairs of rolls; a movable flexible web mounted in juxtaposition to one of the rolls of said other pair for pressing the fibers against the peripheral surface of said one of the rolls, said web being free of engagement with the other roll of said other pair.

2. In a machine for producing staple fibers from continuous filaments, said machine comprising two pairs of driven rolls which are operable to tension and rupture the filaments into the staple fibers while said filaments pass from one of said pairs of rolls to the other of said pairs of rolls, said last mentioned pair of rolls comprising one roll over which the fibers pass and a companion pressure roll; the combination with said one roll of a movable flexible web mounted in juxtaposition to said one roll for pressing the fibers against the peripheral surface pressure roll whereby the lengths of said staple fibers correspond substantially to the linear dis-, tance from the bight of said front rolls to a point filaments as they pass from said back rolls to said front rolls, said front rolls comprising one roll over which said fibers pass and a pressure roll,

and means disposed between said back rolls and -said pressure roll for pressing the fibers against the peripheral surface of said one roll during the 1 movement of the fibers to said pressure roll, and a thereof back of said pressure roll, the rear-most 4 continuous filaments, comprising, in combination, a front pair of rolls and a back pair of rolls which are operable to tension and rupture the filaments as they pass from said back rolls to said front rolls, said front rolls comprising one roll over which said fibers pass and a pressure roll and means disposed between said back rolls and said pressure roll for pressing the fibers against the'peripheral surface of said one roll during the movement of the fibers to said pressure roll, the rear-most portion of said means in the direction in which said filaments pass being disposed forwardly of said back pair of rolls and the forwardmost portion thereof being disposed back of said spinning device in advance of said pressure roll for spinning said fibers into yarn, the rear-most portion of said means in the direction in which said filaments pass being disposed forwardly of said back pair of rolls and the forward-most portion thereof being. disposed back of said pressure roll whereby the lengths of said staple fibers correspond-substantially to the linear distance from the bight 01' said front rolls to a point between the bight of said back rolls and said rear-most portion.

CHARLES EUGENE NEISLER, JR.

REFERENCES crrEn 'The following references are of record in the file of this patent: I

UNITED STATES PATENTS Number Name Date 1,883,384 Lohrke et a1 Oct. 18, 1932 2,366,785 Hays Jan. 9, 1945 2,435,157 Piron Jan. 27, 1948 FOREIGN PATENTS I Number Country Date 384,822 Great'Britain Dec. 15, 1932