US2862249A - Drawing frame and clearer system therefor - Google Patents

Description

1958 J. 5. DUDLEY ET AL 2,

DRAWING FRAME AND CLEARER SYSTEM THEREFOR Filed March 6, 1956 2 Sheets-Sheet 1 (D N a Q m INVENTORS. if, JOHN S. DUDLEY,

WILLIAM J. LANGLOIS 8.

JOSEPH H L. ROY.

ATT'Y.

1958 J. s. DUDLEY ET AL 2,862,249

DRAWING FRAME AND CLEARER SYSTEM THEREFOR Filed March 6, 1956 2 Sheets-Sheet 2 W/// 7N J r I IN I'I-INTORS.

Fl q. 2 JOHN s. DUDLEY WILLIAM J. IIANGLOIS & BY JOSEPH H. L. ROY.

DRAWING FRAME AND CLEARER SYSTEM THEREFOR Application March 6, 1956, Serial No. 569,742

2 Claims. (Cl. 19-139) This invention relates to machines for drawing textile fibers preliminary to spinning and twisting operations. More specifically, the invention relates to improved pneumatic apparatus for removing fly and lint from the drawing rolls and for collecting and holding the waste material.

Machines are known in which lint and fly are thus removed by pneumatic clearing apparatus, and it is the general object of this invention to improve the drawing frames and'the pneumatic clearing apparatus associated therewith in such manner that less power is consumed, more uniform and more satisfactory operation is attained, and that neither the surrounding floor space nor the over-all dimensions of themachine are increased.

We also provide a construction by which a drawing frame can be built double and with separate roll driving mechanism at both ends of the machine, and with the pneumatic clearer apparatus disposed in a central and otherwise comparatively unobstructed space, well removed from all driving mechanism.

We also provide a machine in which the lint-collecting ducts are only one-half as long as were previously required in machines of equal capacity. Lower and more uniform air exhaust may thus be utilized.

Our invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawings, in which Fig. 1 is a front elevation of our improved machine; and

Fig. 2 is an enlarged partial transverse section of the machine, taken along the irregular line 22 in Fig. 1.

Referring to Fig. 1, we have shown a double drawing frame having four drawing heads 10 at the right-hand end of the machine and which are driven from the motor M through suitable driving connections 12 which are mounted in the end frame member 14. Four additional drawing heads 10a are mounted in the left-hand portion of the machine, and the heads 10a are driven by a motor M through suitable driving connections 15 in the opposite end frame member 16.

The end frame members 14 and 16 are connected by a longitudinal frame member 20 which is supported at its middle point by a center frame member 22. Lower cross girts 23 and 24 are provided between the frame members 14 and 22 and 16 and 22, respectively.

Tables 25 and 26 are mounted in front of the girts 23 and 24 to support the roving cams, and these tables may be moved in closed paths in horizontal planes by any suitable mechanism, such as that shown in Hendrickson Patent 2,355,071 issued August 8, 1944.

All of the drawing heads 10 and 10a are duplicates, and one of these heads is shown in section in Fig. 2. Referring to Fig. 2, the drawing mechanism comprises back rolls 30 and 31 mounted in adjustable bearing United States Patent blocks 32, intermediate rolls 40, 41 and 42 mounted in adjustable intermediate bearing blocks 44, and front rolls 50, 51, 52 and 53 mounted in fixed bearing members 55. All of the bottom rolls 30, 40, 42, 50 and 52 are rotated in predetermined speed relation by the motors M and M and the driving connections 12 and 15, as shown in Fig. 1.

All of the upper rolls 31, 41, 51 and 53 are rotated by frictional engagement with the driven lower rolls. The back and intermediate bearing blocks 32 and 44 may be adjusted forward and back to provide the desired spacing between the rolls.

Arms 57 (Fig. 2) are pivoted at 58 and may be pressed downward to apply yielding pressure to the top drawing rolls through any usual connections.

The arrangement of the drafting rolls and the driving connections and adjustable bearings therefor form no part of the present invention, which relates particularly to the clearing of fly, lint or other waste from the drafting rolls.

For this purpose, we provide clearer devices 60, 61 and 62 for the upper rolls 53, 51 and 41. The members 60, 61 and 62 for each drafting head are vertically adjustable in a separate collecting chamber or'hood 70, mounted to swing about a fixed pivot 71 and extending forward over the associated top rolls. No clearers are provided for the back rolls 30 and 31, asfly and lint does not commonly collect on these rolls.

Exhaust passages 72, 73 and 74 are formed in depending portions 75, 76 and 77 of each hood or collecting chamber 70. The portions 75 and 76 are fixed with respect to the hood 70 but the portion 77 has a boltand-slot connection thereto, permitting the portion 77 to be adjusted forward and back with the intermediate bearing block 44.

The hood or collecting chamber 70 has an end portion 80 which extends through an opening 81 into an upper header 82 which extends at the rear of a group of drawing heads, as 10 or 10a. The upper header 82 is connected by a down pipe 84 to a lower header 85, which in turn is connected through an opening 86 to the upper part of a chamber 87 formed in the hollow center support 22.

A screen 90 (Fig. 1) is mounted in one side wall of the center support 22, and air is exhausted from the chamber 87 by a fan 92 rotated by a motor M2. The exhausted air is discharged through a pipe 93 and through an opening in the upper surface of the lower girt 23. This air is then returned to the atmosphere through a suitable directing baffle structure.

The fly, lint and other waste material which is separated from the air drawn from the clearer devices by the screen 90 is deposited in the chamber 87, from which it may be removed through a door 96.

Clearers and 101 are provided for the bottom rolls and are connected through passages 102 and 103 to a lower collecting chamber 104, the open end of which extends through a discharge pipe 106 to the lower header 85 previously described.

The collecting chamber 104 is held in raised or operative position by a brace 110, which may be moved manually to engage a stop 112. The rear exhaust passage 103 is formed in an upwardly projecting member 114 having a bolt-and-slot connection for forward and back adjustment, as previously described.

With the construction above described, provision is made for connecting a single exhaust apparatus, such as the fan 92, to remove all of the fly or lint and other waste material from two separate sets of drawing heads, as 10 and 10a, and with the use of relatively short upper and lower headers for each group of drafting heads.

removed to the collecting chamber 87, and reduced suction or exhaust pressure may be used.

' It will also be noted that the exhaust apparatus, comprising the fan 92, motor M2 and discharge pipe 93, are located in a relatively unobstructed space between the end frame 14 and the center frame 22, so that there is no interference with the roll-driving mechanism, and so that the floor space and outside dimensions of the machine may remain unchanged.

Having thus described our invention and the advantages thereof, 'we do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what we claim is:

1. A drawing frame comprising two axially-aligned series of drawing roll units, a supporting frame for all of said units, said frame comprising two full-height upright and'spaced end'frame sections and a hollow partheight upright middle frame section, said end frame sections being connected by a cross member which overlies and is supported-by said middle frame section, separate roll driving mechanism in each spaced end frame section to drive the adjacent series of drawing roll units, a separate motor to drive each separate roll-driving mechanism, a separate set of pneumatic clearer apparatus for the drawing rolls of each series of units, direct exhaust connections from each set of clearer apparatus to said hollow middle frame section, a single common air-exhausting mechanism mounted adjacent one side of said hollow middle frame member and connected to 30 exhaust air from both sets of clearer apparatus through said hollow frame member and said exhaust mechanism, a discharge outlet passage for the exhausted air, and means to screen the waste material from the air as it approaches said common air-exhaust mechanism, and said exhaust mechanism and said discharge outlet passage being located in the unobstructed space beneath the drawing roll units and between said hollow middle frame section and one of said end frame sections.

2. In a machine having two separate series of drawing roll units, a supporting frame for said units comprising cross girts, upright and spaced end frame sections and a hollow upright middle frame section, separate driving mechanism for each series, a pneumatic rollclearer device for each drawing roll unit, a common airexhaust conduit system associated with all the rollclearer devices in said machine but separately connected to each series and including the hollow upright middle frame section, and suction means for said air-exhaust conduit system mounted adjacent said hollow middle frame member and in communication therewith and effective to exhaust the air from all of the drawing roll units in both series through said hollow middle frame section to atmosphere.

References Cited in the file of this patent UNITED STATES PATENTS 2,147,190 Cadden Feb. 14, 1939 2,719,335 Buchanan Oct. 4, 1955 FOREIGN PATENTS 1,014,922 France June 25, 1952

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