US2088378A - Pin roll - Google Patents

Description

y 1937' J. J. KREHBlEL 2,088,378

PIN ROLL File d Jan. 22, 1954 INVEN TOR.

BY ATTORNEY Patented July 27, 1937 UNETED STATES PATENT OFFIE PIN ROLL John J. Krehbiel, Bronx, N. Y.

Application January 22, 1934, Serial No. 707,685

11 Claims. (01. 139-304) This invention relates to a new kind of a pin roll. Pin rolls are known to those acquainted with the art of textiles; they form a part of looms or other apparatus used for manufacturing and finishing textiles. Pin rolls are ordinarily mounted at the delivery end of a loom or of such apparatus, and pull the goods through the loom or through the said apparatus at the predetermined speed of operation.

Pin rolls are used on textile machinery and ap paratus to engage at their periphery upon the goods as they issue from such machinery and they feed, i. e., pull, the goods through the machinery or apparatus at a predetermined spee The pin rolls commonly used in the art of textiles at the present time comprise a perforated metal tubing filled with a plastic, ypsum or plaster of Paris for instance. Pins are extended through the perforations of the tube into the plastic, the pointed ends of said pins extending predeterminedly above the metal tubing. The metal tubing is provided with a rough surface between the pins so that the goods are not only engaged by the pins but also by the said rough surface, in order to avoid an undue local strain upon the goods. A rough surface is ordinarily provided for upon the surface of the tubing by extending a coarse fiat material, sandpaper for instance, around the circumference of the tube, the points of the pins extending radially through said material.

This arrangement of the old art entails a number of disadvantages, some of which may be enumerated as follows:

First.--It is difiicult to apply the above described rough material to the surface of the roll, particularly since it must ordinarily be applied when the pins are already assembled upon the tubing.

Second.-It is difficult to gather in the free ends of the coarse material applied to the tube.

Third.-According to whether the coarse material is tightly or loosely spread over the tube, variations in diameter of the covered tube arise, and affect and upset the uniform, predetermined speed of feed.

Fourth-Extreme care must be used in selecting the coarse material, because the pin roll will feed the goods at different speeds, if the coarse material varies in thickness and if there is an irregularity in the protuberance of said material which impart the coarseness thereto. If sandpaper is used as a coarse material, the coarse grain may be shaken out by the vibrations of the machine, or may drop off under changes of temperatures.

Fifth.Plastic filling of tubes frequently looses its hold upon the pins inserted therein, for in stance when the plaster of Paris dries. The pins become loose, shake, come out of alignment, or drop out. When pins thus drop out they fall onto the goods and damage the goods and the machinery, through which the goods pass afterwards.

The pins frequently have to be replaced for different kinds of goods. Under those circumstances it is often found that the newly inserted pins are not duly engaged in the holes left by the removed pins. The replacement of heavier pins by thinner pins is practically impossible.

Sixth-Since the tube is perforated where the pins are to be extended therethrough, the pins have to be arranged accordingly. In other words it is not possible to change the pattern in which g the pins are arranged; thin pins engaging upon finer goods cannot be arranged in a closer pat tern than the coarser pins used upon coarse goods.

Seventh.lt is costly to drill the tube accurately and the insertion of the pins is also costly, because they have to be inserted by hand. Simple mechanical devices which readily suggest themselves to those acquainted with the art of manufacturing and assembling machinery, a jig for instance by which a whole row of pins is inserted in the roll at a time, cannot be used unless the perforations of the tube have been drilled with precision, which again would prove to be uneconomical.

' Eighth.It is difficult and tedious to insert the pins to a fixed depth so that they uniformly protrude from the surface of the roll.

These and other disadvantages of the pin rolls of the prior art have been overcome by this invention, and further objects of my improvement will become apparent and will be understood from the following description of my invention and the accompanying drawing, in which Fig. 1 shows a perspective view of a sectioned pin roller of my invention.

Fig. 2 shows an enlarged detail section.

Fig. 3 shows a modification of my invention.

Fig. 4, a similar sectioned detail View elaborates on the modification of Fig. 3.

Similar numerals refer to similar parts throughout the various views:

I provide my pin roll with a core which has a solid surface. In Fig. 1 I illustrate such a core by a tube 6, made of metal for instance, which is supported concentrically to the shaft 1 by discs,

a flange 8 for instance. A wooden beam or other equivalents may be substituted for the solidly surfaced core thus described, as clear to those acquainted with the art of textile machinery.

Around the outer surface 9 of the core extends a covering 50 made out of an elastic material, rubber for instance. The pins H are spacedly inserted into said covering l0, substantially centripetally.

Grooves l2 are provided for in the surface l3 of the covering ID in order to provide a uniform- 1y irregular surface, which affords a better grip upon the material to be fed upon the pin roller.

When the goods to be fed are of a delicate nature and are to be fed very cautiously, it is desirable that the outside diameter of the pin roll, at surface 13, be accurately uniform. It will be understood from the showing of Fig. 3, that even if holes are drilled into outer covering Hi into which the pins are inserted, that the yieldable material of said covering is slightly spread, when the oversize pin M is inserted into such a drilled hole. This causes a slight bulging of the surface i3 of the covering 40 as indicated by the slightly raised surface I5 of the covering, as compared with its disposition before the pin is inserted, as indicated by the dotted lines I6. For that reason I show the pins to be inserted in the bottom of the grooves l2, in Fig. 1, and preferably they are inserted at points where such grooves cross. Under such circumstances the material of covering it will bulge within the groove if such bulging is caused by the insertion of the pin. But the surface l3 of the covering ill will not be affected by such bulging and will preserve its uniform diameter..

Uniformly sized pins II will extend to like distances from the surface of the roll, if they are inserted into the covering l0 so as to rest upon the surface 9 of the core, (as indicated in Fig. 2). The covering Ill may be softer at its surface than near its inside, so that the softer surface offers a better grip upon the material, whereas the harder inner part offers a more substantial grip upon the root of the pin. It is known that rubber thus may be treated to be of different hardness at different points; or the rubber may be app-lied in layers of different hardness as indicated by layers H and E8 of Fig. 3.

For several purposes I may reverse this arrangement, for instance where the grooves l2 are considered to provide a sufficiently irregular surface to provide an adequate grip upon the goods, but where it is essential that the outer surface l3 retain its true shape in diameter and circumference to the greatest extent possible, then the surface I3 is made of greater hardness, whereas the inside of the covering I0 is softer in order to afford an elastic but firm grip for a pin I4 inserted in said covering. In such an instance I provide a harder outer layer I8 and a softer inner layer ll of the covering ID, in the manner of the showing of Fig. 4.

But Fig. 4 goes further and shows a plurality of hard and soft layers. The hard layers l8 serve to retain the pins H in radial alignment whereas the soft layers I! arranged between the hard layers serve to grip the pins l l by reason of their elastic properties.

What I claim is:

1. A pin roll comprising rubber and pins supported solely by said rubber, and protruding from said roll.

2. A pin roll comprising a rubber covering, and extractable pins supported solely by and protruding from said covering.

. 3. A take up roll for textile machines comprising a rubber covering, and pins engaged in said covering only and protruding therefrom.

4. A pin roll comprising a grooved rubber covering, and pins protruding from the bottom of the grooves in said covering.

5. A take up roll for textile machines comprising a core, a rubber coveringon said core, and pins resting on the surface of said core and extending through said covering.

6. A pin roll comprising an inner rubber layer, a softer outer rubber layer, and pins centripetally inserted in and engaged by said outer layer and extending from said roll.

'7. In a take up roll for textile machines, a core, an elastic covering, and pins completely disposed outside of said core and engaged by said covering.

8. The method of making a pin roll, comprising extending an elastic covering over a core, and then inserting pins in said covering up to said core.

9. The method of making a pin. roll in which pins extend from elastic material forming part of said roll, comprising substantially centripetally inserting said pins into said material.

10. A pin roll, comprising a core, an elastic covering on said core, and pins mounted in said covering but spaced from said core.

11. In a pin roll, an elastic covering, and pins protruding from one side of said covering and inserted to a limited depth in said covering from said side.

JOHN J. KREHBIEL.

Images