US3482384A

US3482384A - Friction twisting apparatus

Info

Publication number: US3482384A
Application number: US690294A
Authority: US
Inventors: Emil J Berger Jr
Original assignee: Turbo Machine Co
Current assignee: Warner and Swasey Co; Turbo Machine Co
Priority date: 1967-12-13
Filing date: 1967-12-13
Publication date: 1969-12-09
Anticipated expiration: 1986-12-09
Also published as: NL6817649A; ES361808A1; GB1212059A; DE1809301A1; FR1604034A; BE725332A

Description

Dec. 9, 1969 5,.1. BERGER, JR 3,432,384

FRICTION TWISTING APPARATUS Filed Dec. 13, 1967 2 Sheets-Sheet l INVENTOR. ii=1 Emil J. Berger, J11

ATTORNEYS.

Dec. 9, 1969 E. J.BERGER, JR

FRICTION TWISTING APPARATUS 2 Sheets-Sheet 2 Filed Dec. 13, 196'? INVEOR. Emil J. Berger, Jr.

WJWM

ATTORNEYS.

United States Patent 3,482,384 FRICTION TWISTING APPARATUS Emil J. Berger, Jr., Wayne, Pa., assignor to Turbo Machine Company, Lansdale, Pa., a corporation of Pennsylvania Filed Dec. 13, 1967, Ser. No. 690,294 Int. Cl. D01h 13/26, 7/92, 7/46 US. Cl. 57-34 18 Claims ABSTRACT OF THE DISCLOSURE An apparatus is provided for facilitating the texturizing and bulking of a plurality of yarns prior to conveying the yarns to a knitting portion of a knitting machine, the apparatus being adapted for false twisting yarns and heatsetting the yarns in their zone of false twist. A particularly novel means comprising oppositely movable belt runs is utilized for applying the false twists in a continuous manner, during longitudinal movement of the yarns. The twists are then removed from the yarns by passing the yarns between a downstream set of nip rolls, the yarns becoming unt-wisted following their passage through the nip rolls due to the substantially increased length of the yarns downstream of the downstream nip rolls for receiving the twist from the twist zone.

BACKGROUND OF THE INVENTION In yarn texturizing apparatus of the prior art, it is conventional to twist yarns in pairs, and then to separate the twisted pairs of yarns by passing each yarn in a pair over a set of separating pins, such as disclosed in the patent to Carruthers No. 3,091,908. While the yarns are in their twisted condition, the yarns are heat-set, the subsequent separating step being operative to re-orient the yarn filaments, thereby providing a texturized or bulked yarn product. In apparatus of the prior art type, beside requiring that yarns be twisted in pairs, it has heretofore been necessary to pre-twist the yarns either by hand or otherwise, in a separate operation. Such a separate operation has generally been conducted at a high rate of speed, in order to facilitate economy of operation, in that, after texturizing the yarns, other operations were necessary, such as winding the yarns on bobbins, placing the bobbins in a creel, unwinding the bobbins onto a beam, such as one of the tricot type, in parallel relation, all prior to feeding the yarns to a knitting machine at a relatively slow speed.

SUMMARY OF THE INVENTION The present invention seeks to provide a substantial improvement to the prior art, in providing an apparatus which is adapted to continuously apply false twist to individual yarns, during longitudinal movement of the yarns through a twist zone, while setting the filaments of the yarns in the twist zone, to provide texturized and highly bulked yarns directly to a knitting, weaving or tufting machine, at machine feed speeds, or onto a bobbin or spool or the like, or to any other such yarn processing machines including yarn dyeing equipment and the like.

Accordingly, it is a primary object of this invention to provide an apparatus for facilitating the texturizing of yarns by moving the yarns along paths, and false twisting the yarns individually, during their movement along their paths, and setting the twisted yarns, prior to untwisting the yarns.

It is another object of this invention to provide an apparatus of the above-discussed type, wherein the false twist is applied to the moving yarns by means of transversely disposed continuously oppositely movable belt runs which frictionally engage and apply the false twist to the yarns.

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It is a further object of this invention to accomplish each of the above objects, wherein the belt runs are offset longitudinally of the machine, as well as vertically, such that yarns passing therebetween are forced to follow the contour of each of the belt runs for a short distance, whereby the yarns passing between the belts do not follow a straight line path, but follow a path having a vertical offset therein.

It is a further object of this invention to provide an apparatus for applying a false twist to continuously moving yarns passing between a pair of oppositely moving belt runs, wherein the yarns are frictionally engaged and are carried transversely of the machine direction for a short distance, thereby resulting in a slight angular disposition of yarns moving downstream toward the belt runs, such slight angular disposition being relative to a longitudinal straight-line direction of yarn travel through the apparatus.

It is a further object of this invention to provide an apparatus for facilitating the provision of texturized yarns, such that yarns are continuously conveyed along paths in which the paths pass through twist zones wherein they are engaged by oppositely moving belt runs and are continuously twisted and heat-set within the twist zone, with means being provided for applying twist to the yarns in opposite directions across the apparatus, for balancing twist forces across a knitting machine or the like to which the apparatus may be connected.

It is another object of this invention to provide a knitting machine embodying the various apparatus characteristics set forth in the above-mentioned object paragraphs, wherein the texturized yarns are directly fed into knitting portions of knitting machines.

It is yet another object of this invention to provide a novel method of continuously and simultaneously applyin-g false twist to a plurality of moving yarns.

Other objects and advantages of this invention will be apparent to those skilled in the art, from the following general and detailed description of the preferred embodiment, the drawings, and appended claims.

In the drawings:

FIGURE 1 is a top plan view of the continuous yarn twist apparatus of this invention, mounted on the frame of a knitting machine or the like, the knitting machine being fragmentally illustrated, wherein the paths of yarn travel are clearly illustrated.

FIGURE 2 is a longitudinally sectional view, schematically illustrated, of the machine of this invention taken generally along the line IIII of FIGURE 1, and wherein the upper and lower yarn runs are clearly illustrated, for providing texturized yarn to a knitting machine or the like, wherein adjacent yarns have been alternately twisted.

FIGURE 3 is a transverse sectional view of the apparatus of this invention, taken generally along the line HIIII of FIGURE 1, and wherein the pulley systems which provide the means for twisting the yarns are best illustrated.

FIGURE 4 is an enlarged fragmentary detail view of that portion of FIGURE 3 designated by the numeral IV, and wherein there is clearly illustrated the manner in which oppositely moving belt runs engage above and below vertically offset yarn portions, for providing clockwise yarn twisting.

FIGURE 5 is an enlarged fragmentary detail view of that portion of FIGURE 3 designated by the numeral V,

and wherein there is clearly illustrated the manner in which oppositely moving belt runs engage above and below vertically offset yarn portions, for providing counterclockwise yarn twisting.

Referring now to the drawings in detail, reference is first made to FIGURE 1, wherein there is illustrated a portion 10 of a knitting machine, comprising opposite frame sides 11 and 12 which have respective

frame side extensions

13 and 14.

The frame side extension 13 includes, at the extreme right end thereof, as viewed in FIGURE 1, an inwardty projecting beam journal portion 15.

Similarly, the frame side extension 14 has connected thereto a beam journal portion 16, offset from the side extension 14 by a transversely disposed frame portion 17. A beam 18, having axially extending shaft portions and 21 is carried between the axially inwardly directed journal portions 15 and 16, in transversely offset relation to an imaginary longitudinal center line of the knitting machine 10.

A sley bar 22 having a plurality of upstanding guide pins 23 thereon is disposed transversely of the clockwise twisting texturizing apparatus generally designated by the numeral 24, between the

frame side extensions

13 and 14.

A pair of

nip rolls

25 and 26 are disposed downstream of the sley bar 22, in vertically aligned relationship, to

effect a nip therebetween. The

rolls

25 and 26 are also carried at their ends by the

frame side extensions

13 and 14.

A heater 27 is disposed between the

frame side extensions

13 and 14, downstream of the

nip rolls

25 and 26, the heater 27 having upper and lower arcuately

curved surfaces

28 and 30, respectively.

A mounting bracket 31 is carried by the frame extension 14, downstream of the heater 27, and has a sley bar 32 mounted thereon, extending transversely of the texturizing apparatus 24, the sley bar 32 having a plurality of upstanding pins 33 across its width, for guiding yarns therebetween.

A pair of

carrier brackets

34 and 35 extend inwardly of the respective

frame side extensions

13 and 14, and carry a sley bar 36 therebetween upon which is mounted a plurality of upstanding separator pins 37, the separator pins 37 being disposed along the bar 36 transversely thereof, for guiding and separating yarns passing therebetween.

The carrier bracket 34 carries longitudinally disposed shafts 38 and 40 upon which a pair of pulleys 41 and 42 are respectively rotatably carried. Similarly, a pair of

shafts

43 and 44 extend longitudinally upstream or rightward, as viewed in FIGURE 1, carrying

respective pulleys

45 and 46 rotatably mounted thereon.

A pulley belt 47 is carried by and between

pulleys

41 and 45, and has a run 48, disposed adjacent a run 51 of a pulley belt 50, carried between the pulleys 42 and 46. The yarns conveyed longitudinally of the apparatus 24 are adapted to pass between the

runs

48 and 51 of the

respective pulley belts

47 and 50, and with respect to yarns passing between the

runs

48 and 51, the run 48 is a lower run and the run 51 is an upper run. It will be noted, with reference to FIGURE 2, that the

runs

48 and 51 of the

respective pulleys

47 and 50 are disposed as viewed in FIGURE 2, with the

runs

48 and 51 partially horizontally adjacent each other to preclude a straight line path of yarn from the upper surface 28 of the heater 27 to a' downstream pair of

nip rolls

52 and 53, the

rolls

52 and 53 being carried between the

frame side extensions

13 and 14. Also, the lower and

upper runs

48 and 51 respectively, are offset longitudinally of the machine, and are thus not disposed in vertical alignment. This facilitates the tendency for yarns conveyed between the

runs

48 and 51 to follow the rounded configuration of the

runs

48 and 51, for a slight arc, for a purpose later to be described.

The shafts 38 and 40 also carry

respective pulleys

54 and 55, which are rotatably connected by means of a toothed belt 56, for rotation of the

pulleys

54 and 55, and consequently for rotation of the shafts 38 and 40 in the same direction. A gear 57 is carried by the shaft 38, being keyed or otherwise suitably secured to the shaft. A shaft 58 also extends longitudinally from the gear 57, and a motor 60 is mounted on the frame side extension 13, for rotatably driving the shaft 58, the gear 57 the 4 shaft 38, and the

pulleys

41 and 54 and consequently the pulleys 55 and 42.

Disposed below the apparatus 24 which is adapted to provide texturized yarns which have been twisted in a clockwise direction, is an apparatus generally designated by the numeral 62 which is adapted to provide texturized yarns which have been twisted in a counterclockwise direction as viewed looking downstream of the knitting machine 10. This apparatus 62 is generally similar to the apparatus 24, and includes components generally mounted directly beneath similar respective components of the apparatus 24.

The apparatus 62 includes a beam 63, mounted between the

frame side extensions

13 and 14, a sley bar 64 having downwardly extending guide pins 65, and upper and lower nip rolls 66 and 67, respectively. The apparatus 62 also utilizes the lower surface 30 of the heater 27. Disposed downstream of the lower surface 30 of the heater 27 is a sley bar 63 having downwardly depending guide pins 70, and spaced downstream of the sley bar 68 is a sley bar 71 having depending guide pins 72 carried thereby. A pair of downstream nip rolls 73 and 74 are also provided, disposed between the frame sides 13 and 14, as are the other components, beneath their respective counterparts in the apparatus 24.

Between the sley bars 68 and 71 there is disposed a pair of

pulley belts

75 and 76. The pulley belt 75 is carried be tween a pair of pulleys 77 and 78, carried on respective shafts 80 and 81, which are, in turn, carried by the mounting

brackets

35 and 34, respectively. A pulley 82 is also mounted on the shaft 81.

The pulley belt 76 is disposed about a pair of

pulleys

83 and 84 which are, in turn, carried by a pair of shafts 8'5 and 86, also carried by the

brackets

35 and 34, respectively. A pulley 87 is also mounted on a shaft 86, for rotation therewith, and is driven through a toothed belt 88 from the pulley 82 carried by the shaft 81.

A gear 90 is also carried by the shaft 81, and provides driving rotation for the shafts 80, 81, 85 and 86 in that it is engaged with the gear 57 carried by the shaft 38.

The

pulley belts

75 and 76 of the apparatus 63 provide respective upper and lower belt runs 91 and 92.

The upper and lower belt runs 91 and 92 are also offset longitudinally of the apparatus 62, and are disposed partially adjacent each other horizontally to preclude a straight line path from the surface 30 of the heater 27 to the nip between the downstream rolls 73 and 74, as viewed in FIGURE 2.

The

pulley belts

47, 50, 75 and 76 are generally of circular, oval, or any other arcuate cross section or the like, and may be constructed of rubber or similar synthetic materials having the desired friction characteristics for providing twist to yarns conveyed therebetween, in a manner later to be described.

Downstream of the

rolls

52, 53, and 73 and 74, there is provided a standard knitting machine roll 93, disposed between the frame sides 11 and 12, for rotation. Yarns passing through both of the

apparatus

24 and 62 in a downstream direction are delivered to and over the roll 93, and conventionally through the remaining portions of the knitting machine 10.

Drive means 94 are provided for the rolls 25; 26, 52; 53, 66; 67, and 73; 74 comprising pulleys 95 and 96 disposed at ends of the rolls and connected by one or more pulley belts 99. A suitable motor (not shown) is provided for driving the pulleys 95 and 96 and pulley belt 97.

OPERATION With reference to FIGURE 2, it is apparent that yarn Y are threaded from the beam 18, between the pins 23 of the sley bar 22, between the nip of the

rolls

25 and 26, over the surface 28 of the heater 27, between the pins 33 of the sley bar 32, over the run 48 of the pulley belt 47, under the run 51 of the pulley belt 50, between the pins 37 of the sley bar 36, and through the nip of the

rolls

52 and 53. The yarns Y are threaded in a similar manner, from the beam 63, between the pins 65 of the sley bar 64, between the nip of the rolls 66 and 67, over the surface 30 of the heater 27, between the pins 70 of the sley bar 68, beneath the run 91 of the pulley belt 75, over the run 92 of the pulley belt 76, between the pins 72 of the sley bar 71, and between the nip of the rolls 73 and 74. Upon operation of the knitting machine 10, the yarns Y and Y are continuously drawn through the

apparatus

24 and 62.

Upon operation of the motor 60, during the conveying of the yarns Y and Y through their

respective apparatus

24 and 62, the

gears

57 and 90 are oppositely rotated, as shown in FIGURE 3, such rotation being provided through the various pulleys and belts illustrated, such that the belt run 51 is directed toward the right, as viewed in FIGURE 3, and the belt run 48 is directed to the left, as viewed in FIGURE 3, with the yarns Y passing therebetween.

The belt run 91 is directed leftward, as viewed in FIG- URE 3, and the belt run 92 is directed to the right as viewed in FIGURE 3, with the yarns Y passing downstream therebetween.

With reference to FIGURE 4, it is readily apparent that each downstream moving yarn Y passes over the upper surface of the lower run 48, and beneath the lower surface of the upper run 51, such engagement of the yarns Y by the

runs

48 and 51 being adapted to provide each yarn Y with a clockwise direction of false twist as illustrated in FIGURE 4.

Similarly, the

runs

91 and 92 provide each yarn Y with a counterclockwise direction of false twist as indicated in FIGURE 5.

Thus, with reference to the apparatus 24, a plurallty of yarns Y passing between the oppositely moving runs 48 and 51 are provided with a clockwise direction of twist. This twist is continuously applied, and extends across the entire twist zone between the

rolls

25, 26 and the

rolls

52, 53. The longitudinally moving yarns Y in this twist zone are subjected to a desired amount of heat from the heater 27, in passing over the upper surface 28 of the heater 27, for heat-setting the yarns, in their twisted condition. However, because the twist will exponentially diminish beyond the downstream rolls 52, 53, due to that substantially greater length for accommodating the spread, as compared to the length of the twist zone, the twist which has been applied by the oppositely moving belt runs 48 and 51 and which has been set therein by the heater 27 is spread over the increased yarn length downstream of the

rolls

52, 53, thus effectively providing a high degree of untwisting of the yarns Y after they pass through the nip between the

rolls

52 and 53, and again re-orienting the filaments 0f the yarns Y and leaving them in a highly bulked and texturized condition.

The yarns Y are subjected to the same conditions of false twisting and heating as are the yarns Y and are untwisted as they pass through the nip between the rolls 73 and 74, the yarns Y differing from the yarns Y only in the direction of the applied twist. The result of the oppositely applied twist to the yarns Y and Y is to supply alternately twisted yarns to a knitting portion of a knitting machine 10, the composite yarn supply meas ured transversely of the machine being balanced.

It will be noted that the sets of

pins

23, 33, 37 65, 70, and 72 perform only guiding functions, in maintaining the yarns passing thereby separated from one another, and thus provide yarn paths through the

apparatus

24 and 62, and eliminate yarn entanglements and the like.

The heater 27 may be raised to any desirable temperature, such as will effect the desired heat-setting of the yarn filaments. Similarly, the nip rolls 25; 26, 52; 53, 66; 67, and 73; 74 may be set at desirable nip pressures and speeds to provide end limits for the twist zones of the

apparatus

24 and 62, and to provide yarn tension between roll sets operated at different speeds, if desired.

The relative positions of the

runs

51 and 91, with respect to their associated runs 48 and 92, may be varied, as desired, depending upon the desired degree of twist for the yarns Y and Y The desired quality of the bulked yarns Y and Y may be a controlling factor, in placing the individual yarn runs, as it will in determining the speed of transverse movement of the runs. As has been set forth above, the

runs

48 and 51, as well as the

runs

91 and 92 are offset longitudinally from one an other, such that the yarns Y follow the rounded contour of each of the belt runs 48 and 51, for a slight distance, to provide sufiicient surface engagement of the yarns Y by the belt runs 48 and 51, to enable the desired twisting, as well as to facilitate twisting under the desired pressure, the vertical offset in the paths of the yarns Y passing between the belt runs 48 and 51 also providing the desired force of engagement of the yarns Y by the belt runs 48 and 51. A similar phenomenon is experienced by the yarns Y in their contact by and movement between the belt runs 91 and 92.

It will be noted by reference to FIGURE 1, and in particular to the detailed views of FIGURES 4 and 5, that there is a tendency for each belt run which comes in contact with longitudinally moving yarns to carry the yarns transversely of the

apparatus

24 or 62, at an angle to the usual path of movement of yarn longitudinally to the knitting machine 10, if no false twisting

pulley belts

47, 50, 75, and 76 were provided. In order to overcome this effect, the

beams

18 and 63 are mounted in offset relation to a longitudinal center line (not shown) of the machine 10, more close to the frame side extension 13 than to the frame side extension 14. Thus, yarns which are drawn, for example, from the beam 18 and pass over the run 48, have a tendency to be drawn toward the frame side 14. Similarly, yarns which pass from the run 48 to the run 51 have a tendency to follow the movement of the run 51 toward the frame side 13 thereby providing the angular offsets in the yarn paths between the

pulley belts

47 and 50, as illustrated in plan in FIG. URE 1.

Once the desired speed of pulley belt rotation is known, the

beams

18 and 63 may then be offset an amount sufiicient to compensate for this tendency of the yarn portions to follow moving belt runs by which they will next be engaged during the false twisting operation.

It will be noted with reference to FIGURE 1, that the beam 63 is disposed offset toward the frame side 13, directly beneath the beam 18, due to the positions and relative movement of the belt runs 91 and '92.

The pulley belt 50 may be disposed for vertical movement relative to the pulley belt 47, if desired, to facilitate threading of the yarns Y therebetween. Similarly, the

pulley belts

75 and 76 may also be mounted for relative vertical movement to facilitate threading.

A cooling zone (not shown) may be provided just downstream of the heater 27, if desired. Cooling of the heated yarns may be done by forced air, or often by the ambient air in the machine vicinity, or by any other suitable means.

The motor '60 which drives the pulley belts may be replaced by a drive connection to the main drive (not shown) of the knitting machine, if a synchronous drive is desirable.

The term yarn processing machine shall include knitting, weaving, and tufting machines, devices for winding yarn or spools, bobbins or the like, specialized processing equlpment such as dyeing equipment, prehandling devices, and similar or related machines.

While only a preferred embodiment of the invention has been illustrated and described herein, it will be appreciated that the term yarn is to be read in its broadest sense, and that various modifications may be made in materials components, and relationships of components, without departing from the spirit of the invention.

What is claimed is:

1. An apparatus for facilitating the provision of texturized yarns comprising means providing paths for continuous yarn travel, means defining a twist zone, means for continuously applying false twists to yarns moving along their paths through the twist zone, and means for setting twisted yarns in the twist zone, wherein said means for continuously applying false twists comprise continuously oppositely movable belt runs for frictionally engaging and twisting yarns, wherein said belt runs are disposed transversely of the direction of yarn travel for receiving a plurality of yarns therebetween, wherein said runs are disposed for off-setting the paths of yarn travel therebetween from a common plane taken through a plurality of laterally spaced yarns delivered to said runs.

2. The apparatus as defined in claim 1, wherein said belt runs comprise adjacent portions of separate pulley belts, and means are provided for driving the belts in the same direction.

3. The apparatus as defined in claim 2, wherein said belts are of curved-periphery cross section.

4. An apparatus for facilitating the provision of texturized yarns comprising means providing paths for continuous yarn travel, means defining a twist zone, means for continuously applying false twists to yarns moving along their paths through the twist zone, and means for setting twisted yarns in the twist zone, wherein said means for continuously applying false twists comprise continuously oppositely movable belt runs for frictionally engaging and twisting yarns, wherein one of said belt runs is disposed slightly upstream relative to the other of said runs.

5. The apparatus as defined in claim 1, wherein said setting means comprises means for heat-setting the yarns.

6. The apparatus as defined in claim 1, wherein said means defining a twist zone comprises upstream and downstream nip-forming roller pairs for forming twist zone end limits.

7. The apparatus as defined in claim 1, wherein said means defining paths comprise sley bars.

8. The apparatus as defined in claim 4, including means for continuously supplying angularly offset yarns in a downstream direction to said upstream run from a laterally ofiset source.

9. The apparatus as defined in claim 1, wherein said means which define one end of a twist zone comprise rolls which provide a nip for removing twist from yarns passed therethrough.

10. The apparatus as defined in claim 8, wherein said source is offset in a direction opposite to the direction of travel of said upstream belt run.

11. An apparatus for facilitating the provision of texturized yarns comprising means providing paths for continuous yarn travel, means defining a twist zone, means for continuously applying false twists to yarns moving along their paths through the twist zone, and means for setting twisted yarns in the twist zone, wherein said means for continuously applying false twists includes means for oppositely twisting yarns across said apparatus.

12. The apparatus as defined in claim 11, wherein said latter means comprise upper and lower pairs of continuously opposite movable belt runs.

13. The apparatus as defined in claim 12, wherein one belt run of each said pair of belt runs is disposed slightly upstream of the other belt run in its pair and wherein means are provided for driving the upstream most belt run in each pair in the same direction transversely of the apparatus.

14. The apparatus as defined in claim 11, wherein said latter means comprise means for twisting adjacent yarns across the apparatus in alternate clockwise and counterclockwise directions, said twisting means including pairs of continuously oppositely movable belt runs.

15. A yarn processing machine comprising a frame, means carried by said frame for handling texturized yarns, means providing paths for continuous yarn travel and defining a twist zone, means carried by said frame for continuously applying false twists to yarns moving along their paths through the twist zone, and means for setting twisted yarns in the twist zone, wherein said means for continuously applying false twists comprise continuously oppositely movable belt runs for frictionally engaging and twisting yarns, wherein said runs are disposed for off-setting the paths of yarn travel therebetween from a common plane taken through a plurality of laterally spaced yarns delivered to said runs.

16. The apparatus as defined in claim 15, wherein said belt runs are relatively positionable into and out of yarn twisting positions.

17. An apparatus for facilitating the provision of texturized yarns comprising means providing paths for continuous yarn travel, means defining a twist zone, means for continuously applying false twists to yarns moving along their paths through the twist zone, and means for setting twisted yarns in the twist zone, wherein said means for continuously applying false twists comprise continuously oppositely movable belt runs for frictionally engaging and twisting yarns, wherein said runs comprise means for simultaneously offsetting the plurality of yarns conveyed therebetween from their respective paths of travel.

18. The apparatus of claim 17, wherein said runs have cross-sectional configurations permitting the yarns to conform to the external shapes of the runs for a portion of their travel between the runs.

References Cited UNITED STATES PATENTS 2,778,186 1/1957 Liittgen et al 5790 XR 2,991,614 7/1961 Ubbelohde 57-77.4 XR 3,045,416 7/ 1962 Ubbelohde 575 1.6 XR 3,103,097 9/1963 Meili et al. 57-77.4 3,120,049 2/1964 Spurgeon 66125 XR 3,148,520 9/1964 Biggers 66125 3,228,181 1/1966 Paterson 57-77.4 XR 3,336,738 8/1967 Mattingly et al 5734 3,367,006 2/ 1968 Mattingly 57-34 XR 3,382,656 5/1968 Crouzet 57-34 3,398,220 8/1968 Port et al. 28-72 XR DONALD E. WATKINS, Primary Examiner U.S. C1.X.R.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3 ,482 ,384 December 9 1969 Emil J. Berger, Jr.

It is certified that error appears in the above identified patent and that said Letters Patent are hereby corrected as shown below:

line 35, after "14" and before the period,

Column 6,

f the runs 48 toward the insert because of the movement 0 frame side 14.

Signed and sealed this 16th day of June 1970.

(SEAL) Attest:

Edward M. Fletcher, Jr.

Commissioner of Patents Attesting Officer WILLIAM E. SCHUYLER, JR.