US2570007A - Presser foot - Google Patents

Description

1951 w. G. REYNOLDS 2,570,007

PRESSER FOOT Filed July 21, 1949 46 ff f WILLIAM G. REYNOLDS,

INVENTOR.

Patented Oct. 2, 1951.

UNITED STATES PATENT OFFICE PRESSER FOOT William G. Reynolds, St..Petersburg, Fla. Application July 21, 1949, Serial No. 106,085

Claims.

This invention relates to improvements in fiyers for roving frames and mor especially to an improved presser foot having means for retaining consolidation of the roving as its passes through the same and is directed onto a bobbin.

Asthe sliver passes between the drawing rolls of a roving frame, the sliver is gradually reduced in size and at the same time, the fibres are parallelized to increase their strength when they are spun and twisted.

It is an object of this invention to provide an improved presser foot for the flyers of roving frames such as slubber and finishing roving frames having itsfree end extended beyond the normal length of presser feet commonly in use, and then bent back upon itself so as to provide a pair of spaced paddle portions. Each of these paddle portions is provided with ahole through which the roving passes, as it is wound onto a bobbin, and, although the roving may be of a smaller diameter than the holes in the paddle portions, these holes are preferably off-set relative to each other so the roving will engage the walls of the holes in such a manner as to maintain consolidation of the twisted strand.

It is another object of this invention to provide, in a roving frame, a presser foot having parallel, closely spaced, paddle portions each having a hole therethrough,-through which a roving is drawn as it is placed onto a bobbin against which the presser footis applying pressure. The holes are each provided with a threading slot to permit easy threading, the slot in one section of the presser foot facing in one direction and the slot in the other section of the presser foot facing in the opposite direction so that, when a roving is passing through the two sections of the presser foot, it will, at all times, have all surfaces thereof engaged by a wall of one or both of the holes so consolidation of the roving is maintained, because fibers in the roving are thereby restrained from floating through the threading slots through which the roving is threaded into the holes in the paddles.

It is Well known that in the ordinary conventional type of presser foot, which has a hole therethrough, and which has athreading slot on its upper edge communicating with the hole, when the bobbin onto which the roving is being wound is moving upwardly with relation to the presser foot, there is an upward draft or pull on the roving which causes it to tend to ride upward- 1y into the threading slot in the presser foot thus, forming a ridge of unpressed fibers along that portion of the roving which passes by the slot, since the walls of the hole are not in contact with this portion of the roving and this causes shedding or sticking together of the proximate rounds of the roving when it is wound onto the bobbin. By providing a pressure foot having side by side closely spaced parallel paddle sections, and each provided with a hole therethrough, preferably, but not necessarily, slightly off-set with relation to each other as to their centers, and having the threading slots disposed substantially degrees apart, it is seen that the roving as it passes through the two holes, will at all times have its entire exterior in engagement with the walls of the holes in the two sections of the presser foot, to maintain consolidation of the roving regardless as to whether the bobbin, onto which the roving is being deposited, is moving upwardly or downwardly relative to the presser foot.

Some of the objects of the invention having been stated, other objects will appear as the description proceeds, when taken in connection with the accompanying drawings, in whicha Figure 1 is an elevation of a spindle and bolster and showing a bobbin on the bolster and showin a flyer mounted on the spindle;

Figure 2 is an enlarged sectional plan view taken substantially along the line '2 2 in Fig-- ure 1 and showing my improved presser foot;

Figure 3 is an isometric view of my improved presser foot removed from the flyer;

Figure 4 is a fragmentary elevation looking at the reverse side of the presser foot from that shown in Figure 3; I

Figure 5 is a developed view of the presser foot before it is folded into the position shown in Figure 3;

, Figure 6 is a vertical sectional view on an enlarged scale taken substantially along the line 6-6 in Figure 1;

Figure 7 is a view similar to Figure 6 but showing a larger diameter roving passing through the paddle portions andwith the centers of the holes moved toward each other.

Figure 8 is a fragmentary exterior view of a modified form of presser foot but showing the paddle portions only; 0

Figure 9 is a view similar to Figure 8 but looking at the side of the presser foot paddle which bears against the bobbin when winding a roving thereon; I

Figure 10 is an enlarged inverted sectional plan view of the modified form of presser foot and is taken along the line Ill-I0 inFigure 8;

Figure 11 is a developed view of the modified form of presser foot before being formed as shown in Figures 8, 9 and 10. 7

Referring more specifically to Figures 1 to '7, inclusive, of the drawings, the numeral ID indicates a portion of a roving frame having a bearing ll extending therefrom in which is mounted a spindle 12. This spindle extends upwardly through a whorl l3 and on which is adapted to be supported a bobbin I l. The upper end of the spindle 12 is slotted as at I5 and is adapted to receive a pin [6 fixed in a hub portion 11 of a fiyer. The fiyer has a balancing leg 18 and a presser foot leg H) which is hollow. The roving R comes from between suitable rollers 20 of a roving frame andthrou'gh a bore 22 in the hub 11 andthen out through a hole 2| in the hub l! of theflyer and then passes downwardly through the presser leg, IQ of the fiyer. A presser, designated broadly at 25, is removably mounted on the leg [9 by having a bandlportion 26 passing therearound and substantially held against vertical movement by suitable lugs 28 and 29. The presser has a suitable opening "32' near its lower portion adapted to encircle the lower leg of the arm l9, and the presser has a presser arm 3-3 extending therefrom, which in conventional pressers, such-as shown in- PatentNumberLlQBfiM, has a single presser foot integral therewith provided with a slot in-its upper surface communicating with aliole extending through the presser foot for threading of the roving into the presser foot.

The spindle I2 is driven in a well known manher to rotate at -a speed varying from that in whichthe bobbin I4 is rotated and the bobbin is driven rotatably as well as vertically in a reciprocatory manner by well known means, not shown, but substantially as shown in United States Patent No. 2,046,376.

New, it is a well known fact that with'the above described conventional apparatus, during the placing of the roving onto the bobbin, there is a :traverse motion, since a suitable traverse motionmoves the bobbin l4 upwardly and downwardly as the roving is deposited on the bobbin -14. Now, as thebobbin'moves downwardly, the 1 the roving is pulled upwardly against the upper portion of the hole in the paddle of the presser foot, which causes the fibers to have a tendency towedge into the threading slot of the presser foot, thus forming a ridge of unpre'ssed and i outwardly extending fibers along the length of the roving during this half of the traverse motion.

By providing a double ply presser foot, or a presser foot having two parallel, closely spaced paddles, each provided'with a hole and a threading slot at opposed edges thereof, it is then evident that the traverse motion of the roving frame will notcause the above mentioned defe'ct; but at all times one side of the roving will be pressed .against a solid wall of one or the other of the holes in the two ply presser'foot as shown in-my improved, presser foot structure. :Therefore, instead of providing a single ply presser foot I. provide a presser foot portion broadly designated at W which is bent as at 4! upon itself to provide parallel paddle portions :2 and so. 111 the paddle portion :2 there is provided a hole 43 into which a roving rt is threaded by means or a threading slot at, and in the other portion 48 is provided a hole at through which tne roving passes, being inserted thei'einto through a threading slot 4t.

it is seen that these holes are slightly ofi center, if desired, depending upon the size of the roving being passed therethrough as shown in Figures 6 and l. The roving R, is first fed through the slot i l and then tnrougn a space In which is provided between the two paddle portions 41 and ie to facilitate this threading action. The roving is then passed through hole 45 by means of a slot 46.

It is thereiore seen that during the traverse motion, as the bobbin is moved upwardly relative to the presser foot, the roving will be in contact with the upper portion of the wall of the hole 45 and the lower portion or tne'wall or the hole 43, and upon downward movement of the bobbin relative to the presser foot, the roving W1l1 0CCl-1py very much the same position except that more pressure will be applied by the roving to the bottom portion of the w'all oi the hole 43 than to the top portion of the wall of the hole 45,"and likewise, upon upward movement of the bobbin relative tothepress'er ioot, a greater amount of pressure will be applied by the rovirig against the upper portion of the wall of the hole 45 than to the lower portion of the wall of the hole 43, but in any event, there will be no tendency for a portion-of the roving to slip into a threading slot as it is be: ing passed through-both of the holes 43' and 45, andthus a perfectly rounded smooth roving will result. This will eliminate neps and other imperfections in the yarn due to protruding ridges on the rovings when the rovings are'spun into yarn. Furthermore, this invention can be used on intermediates for the production of heavy yarns, such as SQs and thus the finishin roving frame can be eliminated.

Modified ,form

In Figures 8, 9, 10 and 11 there is'shown a portion of a presser foot embodying a modified form of paddle structure, the objects thereof be: ing the same as in the original form of the in" vention but illustrating a means by which the threading slots for the holes through whichithe roving passes may be disposed longitudinally of the arm of the presser foot. V

V In Figures 8 to 11, inclusive, the'arm 33 has a presser foot on the free end thereof broadly designated at 52. This presser foot 52 comprises an outer paddle portion 53 and an inner-paddle portion 54. The paddle portion 53 is an exten l sion of the arm 33 and is preferably substantially shorter than the paddle portion 54. The paddle portion 54 should be of the same length as other conventional paddles on presser feetlheretofore in use. 7 r i The inner paddle portion 54 is held iin"clo'se ly spaced relation to the paddle portion 53 by a bridging portion 55 which maybe disposed at either the top or'bottom of the paddle portions 60 and GI, respectively, through the holes 56 and 51, respectively.

The slot 60 should be cut in the edge of the paddle portion 53 remote from the arm 33 and the slot 6! should be out in the edge of the paddle portion 54 nearest the arm 33. In both forms of the invention the paddle portions 48 and 54 have a conventional groove 58 therein for directing the roving onto the bobbin. It is thus seen that the roving may be passedthrough the holes 56 and 51 in the paddle portions 53and 54, respectively, and by positioning theseholes 56 and slightly off center relative to the vertical, the roving will be affected in a manner identica1 to the manner described for the original form of the invention shown in Figures 1 to 7, inclusive. It might be stated, however, that in the forms shown in Figures 8 to 11, inclusive, since the draft on-the roving, due to the traver'se motion, is always either upward or downward, there will be no threading slot disposed above or below the roving into which it may tend to move, nor will there be any tendency for the roving to move into a threading slot due to the pull of the bobbin on the roving.

In the drawings and specification there has been set forth a preferred embodiment of the invention, and although specific terms are employed, they are used in a generic and descriptive sense only, and not for purposes of limitation, the scope of the invention being defined in the claims.

I claim:

1. A presser foot for fiy frames employed in processing rovings and having a pair of parallel paddles disposed in spaced relation to each other and each paddle having a hole therethrough through which the roving is adapted to be passed, each of the holes being provided with a threading slot extending to an edge of its paddle for placing the roving into the holes, the threading slots for thetwo holes having their outer open ends facing in an opposite direction to each other.

2. A presser foot for fly frames employed in processing rovings and having a pair of parallel paddles disposed in spaced relation to each other and each paddle having a hole therethrough through which a roving is adapted to be passed, each of the holes being provided with a threading slot extending to an edge of its paddle for placing the roving into the holes, the threading slots for the two holes being disposed slightly out of alinement with each other but having the threading slots opening at points disposed approximately 180 degrees from each other.

3. A presser foot for depositing a roving onto a bobbin in fly frames having two vertically disposed substantially parallel portions, one of which is adapted to press against the bobbin as the roving is deposited thereon, the two vertically disposed portions being spaced from each other and each having a hole therethrough through which the roving is passed and each hole being provided with a threading slot extending to one edge of the portion in which the hole appears, the threading slots extending in opposite directions to each other.

4. In a presser foot for depositing the roving onto a bobbin in fiy frames, said presser foot having two vertically disposed paddles spaced from each other and each paddle having a transverse hole therethrough through which the roving is adapted to be passed and each paddle having a threading slot extending from one edge thereof into the hole, the threading slot in one of the for threading the roving paddles being onthe loweredge thereof and the threading slot on the other paddle being in the' upper edge thereof.

5. A fly frame presser foot having inner and.

outer paddles disposed in spaced relation to each other and said paddles having holes passing therethrough to guide the roving onto the bobbin,

each of said holes having threading slots extend ing to the edge of the paddle portion for inserting of the roving into said holes, said holes being a roving onto a bobbin, said fiyer having a presser. foot provided with two vertically disposed paddles spaced apart from each other, the innermost.

of said paddles being adapted to engage the roving being wound onto the bobbin, each of the paddles having a hole therein, the two holes being slightly off-set with relation to each other and each hole being provided with a threading slot extending through one edge of its associated paddle for placing the roving into the hole, the threading slots being disposed one on one edge of one paddle and the other threading slot being disposed on the opposed edge of the other paddle, whereby, the two holes with their threading slots will provide a continuous confining wall for the roving being passed through the two holes.

7. In a fiy frame having a fiyer for depositing a roving onto a bobbin, said fiyer having a presser foot thereon for engaging the bobbin, said presser foot comprising two vertically disposed paddle portions spaced apart from each other with one of the paddle portions being adapted to engage the roving on the bobbin, each of the paddle portions having a hole therethrough through which the roving is passed for being deposited onto the bobbin, each of the paddle portions having a threading slot extending from one edge thereof to the hole in the paddle portion and the threading slot in one paddle portion being disposed on one side of its paddle portion and the other threading slot in the other paddle portion being disposed approximately degrees from the first-named slot.

8. In a fiy frame having a fiyer for depositing a roving onto a bobbin, said fiyer having a presser foot thereon for engaging the bobbin, said presser foot comprising two vertically disposed paddle portions spaced apart from each other with one of the paddle portions being adapted to deposit the roving onto the bobbin, each 'of the paddle portions having a hole therethrough through which the roving is passed for being deposited onto the bobbin, the edge of the outer paddle portion remote from the fiyer having a notch therein communicating with the hole in the outer paddle portion and the edge of the inner paddle portion proximate the fiyer having a notch therein communicating with the hole in the inner paddle portion, the axes of the holes being off-set with relation to each other and the notches opening in opposite directions.

9. In a fly frame having a fiyer for depositing a roving onto a bobbin, said fiyer having a presser foot thereon for engaging the bobbin, said presser foot comprising two vertically disposed paddle portions spaced apart from each other with one of the paddle portions being adapted to deposit the roving onto the bobbin, the two paddle por- Hons.being prqvidedwith holes and one oil. the iaddle portionsmaving a thneading slot in onev paddles spaced apart from each other in vertical planes the innermost of said paddles being adapted to engage the roving being wound onto the bobbin, each of the paddles having a. hole therein the twoholes being slightly off-set with relation to each other and each hole being provided with a threading slot extending through one edge of its associated paddle for placing the roving into the, hole, one of the threading slotsbeing disposed one on one edge: of; one paddle and the other threading silotibeing; disposed; on" the opposed edge of the other paddle, whereby, the two holes with their threading slots will pro vide a continuous confining wall for the rovingbeingpassed through-the two holes.

WILLIAM G. REYNOLDS REFERENCES CITED The following. references are of record. in the,

file of this patent:;

UN ITED STATES. PATENTS,

Number Name Date- 796,138 Martin et all Aug. 1; 1905- FOREIGN PATENTS,

Number Country Date 311,118 Great Britain u; May-9, 1929,: 345,851,

Great Britain e ..a Apr. 2, 1931;

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