US996557A - Apparatus for condensing fibrous materials preparatory to spinning. - Google Patents

Description

B. BOHLE. APPARATUS FOR GONDENSING FIBROUS MATERIALS PREPARATORY TO SPINNING.

APBLIGATION FILED OUT. 17,1908.

996,557,, Patented Ju n'e zv, 1911.

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BRUNO BOHIJE, F WERDAU, GERMANY, ASSIGNOR TO THE FIRM 0F WERDAUER TEXTILWERKE G. M. B. H., OF LANGENHESSEN, NEAR WERDAU, GERMANY.

Specification of Letters Patent.

Application filed October 17, 1908.

Patented June 27, 1911. Serial No. 458,185.

To all whom it may concern:

Be it known that I, BRUNO BOHLE, manufacturer, a subject of the King of Saxony,

and a resident of Werdau, Germany, have invented certain new and useful Improvements in Apparatus for Condensing Fibrous Materials Preparatory to Spinning, of which the following is a specification.

The present invention has for its object a roving machine especially designed for treating tow waste and other difficult materials, comprising a film divider and condenser, and characterized by the provision of special means for preventing the films from becoming wound around the edges of the dividing bands or adhering to the same.

A further object is to provide an 1mproved intermediate conveyer device for obtaining the above result for removing the ribbon of film from the cutting bands with a speed corresponding to that of the material being treated and to so arrange and construct the conveyer that the operation will not be impeded or the material damaged, and to protect the film with a special arrangement to accompany the dlvidlng bands until the strip of film is delivered,

.which will positively prevent undue adhesion of the film to the dividing bands.

A further object is to soarrange the protecting bands that the film is formed very lightly and will always follow the dividing bands.

An embodiment of the invention is illustrated diagrammatically by way of example in the accompanyin drawing in which Figure 1 is a side elevation, Fig. 2 is a front elevation of the dividing rollers to a larger scale, Figs. 3-5 are diagrams illustrating the difficulty encountered in removing the strips of film directly from the dividing bands to the rubbing belts. Fig. 3 is a diagrammatic plan view of the rubbing belts, wherein the upper belt is running to the right, Fig. 4: is a diagrammatic perspective view of the strip of film in the mid position of the upper rubbing belt, Fig. 5 is a diagrammatic plan view of the strip of film with the upper rubbing belt moving to the left, Fig. 6 is a partial section of a dividing roller showing the dividing bands and protecting bands as heretofore arranged. Fig. 7 is a partial section through a dividing roller showing the arrangement of the protecting bands and dividing bands in accordance with the present invention.

The dividing rollers of the film divider and condenser are marked a and 7). Upon these dividing rollers the film 0 fed in a wide web is divided in the known manner into separate strips f by means of the dividing bands (Z and e. In order to prevent the plucking of the band which is running back, that is, to prevent that the part of the dividing bands running back idly will grasp the fibers projecting laterally from the part of the dividing bands charged with film strips and running ahead, protecting bands 9' and h which are known are provided and accompany the dividing bands until the delivery of the strip of film f. This strip of :film is treated in the known manner upon the rubbing belts 2' and 70 running at the same velocity as the dividing bands, the

thread being given a preliminary twist by the axial reciprocating movement of the rubbing belts.

In film dividers and condensers as heretofore constructed, the ribbon of film 7 was removed from the dividing bands Z and 6 directly by the rubbing belts 2' and is. The manner in which this removal was effected is illustrated in Figs. 3 to 5. The strip of film f carried in the direction represented by the line Z, and indicated by an arrow in Fig. 3, by the dividing bands, continues to be fed as indicated by the lower arrow in the same direction by the rubbing belts, and with a force represented graphically by the line designated by the reference character Z, but owing to the simultaneous axial displacement of the rubbing belt the strip of film is pulled to the right in the direction indicated by the arrow m, and with a force represented by the same arrow; in order to simplify the representation and explanation, the twisting of the strip, which complicates the process, has not been taken into account.

The forces represented by the reference characters Z and m produce a resultant force a, which is greater than the consequent force Z, and the pull of the strip f by this increased force is so much greater in proportion as it approaches the left hand as clearly shown in Fig. 3. The lateral edge A B is therefore torn away from the dividing bands more quickly than the lateral edge C D and is correspondingly longer. Now when the rubbing belts return to the middle position shown on Fig. 4: the extension of the fibers previously referred to results in 5 the formation of a loop which exerts a prejudicial effect upon the uniformity of the roving and is also drawn tight with a jerk during the opposite movement of the rubbing belts illustrated in Fig. and this may obviously very easily cause the strip of film to break. If it be considered that the strip of film adheres very firmly to the dividing bands, especially in preparing tow waste and the like, it is obvious that this irregular, jerky removal of the strip must necessarily frequently impair and break it and that this result might be avoided if it were possible to remove the strip from the dividing bands with a uniform force corresponding to that of such bands. This result is attained owing to the fact that the strip of film f is removed from the dividing bands not directly by the rubbing belts i and 70 but by means of two intermediate conveyer devices such as the pairs of rollers and endless bands 7? and g immovable axially and moving with approximately the same velocity as the dividing bands; this conveyer device then delivers the strip to the rubbing belts. By this means the frequent rupture of the strip of film is obviated with certainty. Owing to the fact that, as shown on the drawing by the arrows, the intermediate conveyer bands pass over the work bands during a portion of their pat-h with an opposite movement to that of these bands, they clean them from any adhering fibers and exert a smoothing effect preventing the retention of the strip of film. The strips of film do not adhere to the belts p and g, because the said strips are in contact with the bands at but a few points and for only a short time.

In the treatment of tow waste it has also been found that in the film dividing and condensing machines heretofore generally employed the strip of film frequently followed the protecting bands instead of following the dividing bands which should deliver them to the rubbing belts. The reason for this is shown in Fig. 6. In this figure the dividing roller 6 in accordance with the usual practice presents a smooth surface upon which the protecting band 9 rests in the first place, then the strip of film f and finally the dividing band cl. Owing to the tautness of the band the strip of film f is pressed with equal force against the protecting band 9 and the dividing band cl so that it 6 is quite an open question which of the bands it will follow when they separate.

Now examining Fig. 7 it will be seen that the dividing roller Z) presents an annular groove r in which the protecting band 9 lies. Upon the protecting band and the flanges s and 2f limiting it laterally the ribbon of film f and the dividing band (Z rest. Now however taut the band (Z may be the only result of this tension is that the strip of film f adheres more tightly to the band d while the band 5 7 O is prevented from pressing strongly against the strip 7' by bedding in the groove 1'. The band 9 therefore bears upon the strip of film with only so light a pressure as is necessary to prevent plucking and the strip of film 7 5 must follow the dividing band from the place where this band and the protecting band separate. The rubbing belts 'i, k are not in contact with the belts p and g. It is essential that the belts p and 9 contact with the belts (Z and 9, but not that they contact with the belts i and 72.

What I claim and desire to secure by Lettei's Patent of the United States is:

1. Apparatus for condensing fibrous nia- 35 terials such as tow wastes and the like preparatory for spinning, comprising a combination of endless dividing straps, rollers for guiding the straps, axially reciprocating rubbing belts to which the fleece slivers are delivered, an intermediate conveyer device consisting of members moving at the point where they are nearest each other in the same direction as the fleece slivers and pressing tightly or jamming the latter between themselves at a point between the dividing straps and rubbing belts, said guiding, members being immovable axially.

2. Apparatus for condensing fibrous materials such as tow wastes and the like preparatory for spinning, comprising a combination of endless dividing straps, rollers for guiding the straps, axially reciprocating rubbing belts to which the fleece slivers are delivered, an intermediate conveyer device consisting of endless belts driven at the point where they are nearest each other in the same direction as the fleece slivers and guiding the latter between themselves at a point between the dividing straps and rubbing belts, said guiding belts having no axial movement and being out of contact with the rubbing belts where the said guiding belts are guiding the fleece slivers.

3. Apparatus for condensing fibrous ma- 115 terials such as tow wastes and the like preparatory for spinning, comprising a combination of endless rubbing belts and dividing straps guided by suitable rollers and delivering the fleece slivers to the rubbing belts re-- i ciprocated axially, covering belts accompanying the dividin belts and guided in grooves in the guide rollers, said covering belts being narrower than the dividing belts and running in grooves on the dividing rollers underneath the dividing belts.

4:. An apparatus of the class described, comprising endless dividing straps, rollers for guiding the straps, covering belts accompanying the dividing belts, axially reciprocated rubbing belts, grooved rollers upon which the covering belts run, said covering belts being narrower than the dividing belts for the purpose set forth.

5. An apparatus of the class described, comprising endless dividing straps, axially reciprocated rubbing belts and intermediate conveyer belts between the dividing straps and the rubbing belts, the portions of the said conveyer belts adjacent to the dividing strapsmoving parallel With the direction of motion thereof, and the portions of the said conveyer belts adjacent to the rubbing belts running in the same direction as the rubbing belts for the purpose set forth.

In Witness whereof I have hereunto set my hand in the presence of two Witnesses.

BRUNO BOHLE.

Witnesses:

WILHELM KoNJETzNY, FREDERICK J. DIETZMAN.

Copies of this patent may be obtained for five cents. each, by addressing the Commissioner of Patents, Washington, D. G.

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