US2278611A - Comb for carding machines - Google Patents

Description

April 7, 1942. A. CAVEDON COMB FOR CARDING MACHINES Filed May 20, 1940 a .z T u m u 2 P. o o O O 6 .nfizzSiri; rEkFEFEl LLIEIIF FIFIIIIIIIIIIILI m a 0 F fll-exgjg ga dogg' Patented Apr. 1942 i i.

UNITED STATES PATENT OFFICE W.

i 2,278,611 f f COMB FOR- GARDING MACHINES Alexander Cavedon, Woonsocket, R. 71. Application May 20, 1940, Serial'No. 336,115 3 Claims. (01. 19 -106 The present invention'relates to doffer combs for carding machines, and has for its object to provide an improved mechanism for moving a comb in a straight line, substantially tangential to the periphery of a dofier roll.

In prior devices of this character combs have been mounted for oscillatory movement about an axis considerably spaced from the point where the fibre web is stripped from the periphery .of the doffer roll. Such spacing is necessary in order that the comb will travel through an arc having a large radius, with the result that the dofied web must travel a considerable distance without support, before entering between the feed rolls of a condenser, or other device for operating on the web. V V

According to the present invention, there is provided an improved mounting and operating mechanism for a doffer comb, whereby a rectilinear movement is imparted to the comb, in a direction that is always substantially tangential to the periphery of the doifer roll. As a result, the mounting for the comb is close to the periphery of the doffer roll, so that the web has only a short distance to travel before entering the rolls of the condenser or other associated device. Furthermore, the comb is so mounted that it may be closely adjusted with respect to the periphery of the dofier roll, without affecting the tangential direction of its reciprocatory movement.

The above and other advantageous features of the invention will hereinafter more fully appear, from the following description considered in connection with the accompanying drawing, in which:

Fig. 1 is a view in side elevation of a portion of a dofier roll having a comb mechanism cooperating therewith, in accordance with the present invention.

Fig. 2 is a plan view of a portion of the parts shown in Fig. 1.

Fig. 3 is a fragmentary sectional view, along the line 3-3 of Fig. 2.

Fig. 4 is a view in front elevation of the assembled parts of the comb operating mechanism removed from the doffer roll.

Fig. 5 is a fragmentary sectional view along the line 5-5 of Fig. 4, and illustrating adjustment of the comb relative to the doffer roll.

Referring to the drawing, the comb structure of the present invention is shown in connection with a portion of a carding machine having a dofier roll I, from which a fibre web 2 is stripped by a comb 3 having a straight line movement, as

later described. Beyond the comb 3, and very close to the point where the web is stripped from the dofier roll, there is shown a 'pair of opposed w'eb' receiving rolls 4, such, for example, as the dividing rolls of a condenser for operating on the stripped web, in'the usual manner. The position of these rolls 4 illustrates their 'extremely close relation to periphery of the doffer roll I, which is made possible by my improved comb support, and which relation would not be possible with the conventional type of comb mounted for oscillatory movement about an axis.

A portionof the frame of the carding machine is indicated at F, and as shown in Fig. 4, brackets 5 are mounted on this frame at eache nd of the doifer roll I, for supporting-between them a pair of'supports 6 forthe comb assembly. The supports 6 are secured to the brackets 5 by means of bolts I, and each support has an arcuate slot 8 therein for receiving one of the bolts I, thereby making it possible to adjust the entire comb assembly with respect to the periphery of the doffer roll, as will later appear.

As best shown in Figs. 2 and 4, each support 6 provides a vertical slot 9, in which is received a plunger II), with the upper ends of the plungers I0 providing inwardly extending projections I I terminating in arms I2 extending downwardly between the supports. The arms I2 are connected by a horizontal bar I 3, to which the comb 3 is attached, so that movement of the plungers II) in the supports 6 will impart straight line movement to .the comb 3, in a direction substantially tangential to the periphery of the doffer roll I, as best shown in Fig. 5.

It is to be noted that the cross bar I3 carrying the comb 3 is movable as a unit with the plungers I0 and their connected arms I2, so that the comb 3 always moves in a straight line determined by the parallel relation between the plungers I0.

Referring again to Fig. 1, each support 6 has mounted thereon a bracket l4 and the opposite brackets I4 support a horizontally extending shaft I5. Adjacent the ends of this shaft are positioned gear segments I6 meshing with rack teeth I! on the plungers III. A depending arm I8 on the shaft I5 has attached thereto one end of a connecting rod I9, the other end of which is connected by a pin l9a on a crank disk 20 turnable with a pulley 2| journalled on a stud 22 on one of the supports 6. A suitable belt 23 drives the pulley 2 I, and thereby causes oscillation of the gear segments Hi to impart a vertical reciprocatory movement to the plungers l0,

in unison. The connection between the arm I 8 and the connecting rod (9 is preferably adjustable by means of a slot 24 in the arm, to control the extent of the comb travel. In operation it has been found that the gear segments I 6 are adapted to impart a reciprocatory movement to the plungers l and the comb assembly supported therebetween, without any substantial vibration being imparted to the comb as might otherwise occur with a direct driving connection to the comb bar.

By the arrangement shown, the comb 3 is given a vertical reciprocatory movement substantially tangential to the periphery of the dofier roll I, and the length of the reciprocatory movement may be varied by adjustment of the connecting rod l9 and arm I8. Moreover, by angular adjustment of the supports 6 about the bolts 1 opposite to the slots 8, the spacing of the operative edge of the comb 3 from the periphery of the dofler roll I may be closely adjusted to suit difl'erent conditions of operation, as indicated in dotted lines in Fig. 5. It will be also noted that the mounting for the comb is such that lint or dust from the material passing through the carding machine will not interfere with the proper functioning of the mechanism. In addition, the comb supporting and reciprocating mechanism is so located that it does not guide, a comb extending between the supports and having upwardly extending projections on opposite ends thereof, means for connecting each of the projections to the adjacent plunger adjacent the top thereof, and means acting directly on said plungers for reciprocating them in unison.

2. In a carding machine having a dofier roll, a bracket positioned adjacent each end of the roll, a support adjustably mounted 'on each bracket, each support having a substantially vertical guide therein, a plunger positioned in each guide, a comb extending between the supports and having upwardly extending projections on opposite ends thereof, means for connecting each of the projections to the adjacent plunger adjacent the top thereof, and means for reciprocating the plungers in unison, said last means including a pair of gear segments, and means for oscillating said gear segments simultaneously, each of said plungers having teeth thereon engageable by the gear segments.

3. A combing device for the doffer roll of a carding machine comprising in combination spaced supports positioned adjacent the ends of said roll, with each support having a straight guideway therein, plungers movable in said guideways, with the horizontally alined ends of said plungers supporting between them a comb bar carrying a comb having its teeth adjacent the periphery of said dofi'er roll, a shaft extending between said supports carrying operating members engaged with said plungers, and means for imparting oscillatory movement to said shaft which is converted into straight line movement of said plungers by said operating members.

ALEXANDER CAVEDON.

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