US2495205A - Sliver roll forming machine - Google Patents

Description

J. S. BROWN Filed Sept. 19, 1946 sLvER ROLL FORMING MACHINE Patented Jan. 24, 1950 SLIVER ROLL FORMING MACHINE James Scott Brown, Arbroath, Scotland, assigner to Douglas Fraser & Sons Limited, Arbroath, Scotland, a corporation of Great Britain Application September 19, 1946, Serial No. 697,942 In Great Britain December 22, 1944 Section 1, Public Law 690, August 8, 1946 Patent expires December 22, 1964 1 claim. l

This invention relates to sliver roll forming machines, and more particularly, though not exclusively, to machines for winding into rolls sliver of jute or other bast libres.

In U. S. Patent No. 1,791,076, of which this application is an improvement, there is described a machine incorporating two half arbors unitary with large end discs carried by pivotal arms and adapted to be swung apart on completion of the roll winding operation to permit ejection of the finished roll. The machine also includes a roller or drum accommodated between the discs for driving the sliver roll by friction.

According to the invention I provide small diameter arbor-starting discs, that is, of a diameter which is only a fraction of the diameter of the finished sliver roll, and I secure to the arms guide cheek-plates which extend towards the back of the machine and which are formed with concave cutaways so as to extend partly around the discs, the concavities approximately fitting the rims of the discs. These cheek-plates are spaced apart a distance slightly exceeding the width of the roll and serve to keep the expanding roll in position and ensure the building up of the roll to the correct width.

On starting a sliver winding operation the discs are driven frictionally by rotary drivers for speeding up the half-arbor in starting the formation of a roll. As the discs are of small diameter, in contrast to that of the roll produced or to the discs of said patent, the space required between one machine and that next adjacent for manipulation of large rolls is greatly reduced.

With the use of the arbor-starting discs it is possible to reduce the diameter of the friction roll-driver drum.

The cheek plates cover the nip of the roll on the respective drum.

The cheek plates thus function as sliver conductors, the surfaces liable to contact with the ends of the roll having at most a limited frictional action on the roll.

The rearward extensions of the cheek plates are particularly useful in that together with a hanging vertical spring back flap of known construction, which serves to push the sliver forward towards the half-arbors for a restart, the cheek plates lform as it were a box container which serves to guide the sliver that continues to be fed during the few seconds in which the arms are descending for a restart.

The gure of the accompanying drawing is a part end elevation part vertical section of a sliver roll forming machine according to the invention. The view shown in the drawing is taken approximately in a plane extending between the half-arbors of the machine and shows the pertinent parts of the machine to which the present invention relates, when the arms, discs and cheek plates are in their elevated position at approximately the timewhen a roll or sliver is completed but has not been removed.

Referring to the drawing, there is provided on each half-arbor as 6 a small diameter arborstarting disc l, that is, of a diameter which is only a fraction of the diameter of the nished sliver roll 2, and I secure to the arms as 3 guide cheek plates as 4 which extend from about the position of the arbor as shown towards the back of the machine and which are formed with concave cutaways so as to extend partly around the respective discs I, the concavities approximately tting the rims of the discs I. These cheekplates 4 are spaced apart a distance slightly exceeding the width of the sliver roll 2 and serve to keep the expanding sliver roll in position and ensure the building up of the sliver roll to the correct width.

On starting a sliver winding operation the ends of the arms 3 carrying the half-arbor 6 are in their lower position so that the discs l are driven frictionally by rotary drivers as 5 for speeding up the half-arbors 6 in starting the formation of a sliver roll on the half-arbors. As the discs I are of small diameter, the space required between one machine and that next adjacent for manipulation of large sliver rolls is greatly reduced. The sliver winding operation is carried out in approximately the same manner as that disclosed in the U. S. patent referred to above, and the mechanism for swinging the arms 3 apart on completion of a rollforming operation may be the same as disclosed in said patent, such features, however, form no part of the present invention.

The relative diameters of the half-arbors 6, of the discs l and of the finished sliver roll will be .Y clear from the showing in the drawing.

With the use of the arbor-starting discs l it is possible to reduce the diameter of the friction driver drum 1 co-operative with the halfarbors 6 and engageable with the sliver roll after formation of the roll has started. The several drums 'l for a group of machines may be carrie on a common shaft 9.

It is to be understood that the distance between the two parallel drivers 5 slightly exceeds the axial length of the drum 1, and that the distance between the two cheek plates 4 slightly exceeds the axial length of the boss of the drum 1, so that when the arms 3 are lowered the discs l contact with the drivers 5, and the cheek plates 4 just .clear theshaft 9 of the drum 1.

The cheek plates t4 cover the nip Vof the sliver roll on its driver drum 1.

The cheek plates 4 thus function as sliver conductors, the surfaces liable to contact with the ends of the sliver roll having at most a limited frictional action on the roll.

The rearward extensions of the cheek plates 4 are particularly useful in that together with a hanging vertical back fiap -8 `of' known construction, which serves to push the sliver forwards rate from said rotary drivers and non-coaxial therewith arranged to engage with the sliver roll on said half-arbors after formation of said roll has started, said arbor-starting roll-conning discs being of substantially smaller diameter than that of the sliver roll when fully formed, and a cheek plate secured to each arm partially embracing the periphery of the disc carried thereby and extending toward the back of the machine, the cheek plates being of sufficient Width to cover the nip of the sliver roll with the driverdrum until the sliver roll is fully formed, and said discs being of a diameter substantially less than the distance between the upper and the lower boundary edges of the cheek plates.

JAMES SCOTT BROWN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 'Number Name Date 1,791,076 Fraser let al Feb. 3, 1931 1,960,146 Fraser et a1 May 22, 1934 1,985,822 Fraser et al Dec. 25, 1934 2,004,045 Fraser et a1 June 4, 1935

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