US3793917A

US3793917A - Rotary filament cutter

Info

Publication number: US3793917A
Application number: US00306226A
Authority: US
Inventors: N Rothmayer; T Flower
Original assignee: Individual
Current assignee: Individual
Priority date: 1972-11-13
Filing date: 1972-11-13
Publication date: 1974-02-26
Anticipated expiration: 1991-02-26

Abstract

A rotary filament cutter is disclosed having a rotating cylindrical cutting element within a stationary cylindrical cutting housing. These two elements, in conjunction with driving means, cut filaments moving in any type of filament string-up process.

Description

United States Patent [19] Flower et al.

[451 Feb. 26, 1974 ROTARY FILAMENT CUTTER [76] Inventors: Thomas A. Flower, 109 Lakeview Ave., Colonial Heights, Va. 23834; Noel York Rothmayer, 2 Spring Garden Dr., Madison, NJ. 07940 221 Filed: Nov. 13,1972

21 Appl. No.: 306,226

Related US. Application Data [63] Continuation-impart of Ser. No. 91,802, Nov. 23,

1970, abandoned.

[52] US. Cl 83/199, 83/580, 83/694, 83/913 [51] Int. Cl B23d 31/00, B23d 35/00 [58] Field of Search..... 83/199, 200, 580, 582, 583, 83/584, 694, 673, 674, 913, 909

[56] References Cited UNITED STATES PATENTS 3,149,518 9/1964 Winestock 33/199 X 2,428,650 10/1947 Brunner 83/199 Primary Examiner-J. M. Meister Attorney, Agent, or FirmRichard A. Anderson 5 7] ABSTRACT A rotary filament cutter is disclosed having a rotating cylindrical cutting element within a stationary cylindrical cutting housing. These two elements, in conjunction with driving means, cut filaments moving in any type of filament string-up process.

1 Claim, 7 Drawing Figures Pmzmw wz 3.793.917

SHEEI 2 OF 3 INVENTORS Thomas A. Flower Y Noel X Roi/mayor has h ATTORNEY ROTARY FILAMENT CU'I'IER This application is a continuation-in-part of US. Pat. Application Ser. No. 91,802, filed Nov. 23, 1970, now abandoned.

BACKGROUND OF THE INVENTION This invention relates to a filament cutter.

Electrical plunger type filament cutters presently in use are prone to jamming from build-up of foreign materials on the cutter, and are not self-sharpening. By filament is meant wire, rope, thread and particularly natural or synthetic yarn, monofilament or multifilament.

SUMMARY OF THE INVENTION The rotary filament cutter of this invention comprises two major components: a rotating cylindrical cutting element and a stationary cylindrical cutting element.

The rotating cutter element fits inside the stationary cutter element. Both have conical ends with a slot through which the filament passes.

The internal cylindrical cutting mechanism is designed in such a manner that its conical end is pressed by means of a spring against theinternal conical end of the external stationary portion. The stationary portion is shaped to provide a tapered cutting edge to the yarn. When the internal portion is rotated through an arc the yarn is forced against the tapered cutting edge and is cut. Both external and internal portions are hardened and lapped together to a fine tolerance. As the internal portion rotates, it sharpens itself against the external portion by wear. In this manner, the normal wear is utilized to keep the cutter sharp, i.e., sharpening a knife against a steel bar such as a meat knife for carving. The rotary motion can be provided by means of electric, gas or mechanical means through a shaft attached to the internal portion. The internal portion is free to move axially on this shaft and is pushed forward by a spring. As wear occurs, the spring holds the cutting surfaces in constant contact.

This device will cut yarn of to over 15,000 denier without binding as the present cutting devices do. The fact that the cutter is self-sharpening and self-cleaning is a unique and specific feature of this design. It can be driven by electric, gas or mechanical means. It is capable of replacing all present filament cutters used in yarn making equipment.

It is relatively immune to the physical abuse, and dirty environment normal to industrial use.

The device of this invention can be threaded more directly, i.e., front loading vs. side loading,'and more easily than prior art cutters.

The rotary filament cutter of this invention is particularly useful to cut yarn moving in continuous textile processing machinery when defects are sensed.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an elevation view of the rotating cylindrical cutting element.

FIG. 2 is a top view of the rotating cylindrical cutting element.

FIG. 3 is a front view of the rotating cylindrical cutter element.

FIG. 4 is a front view of the stationary cylindrical cutter element.

FIG. 5 is an elevation view, with partial cross-section, and partially cut away of the stationary cylindrical cutter element.

FIG. 6 is a front view of the rotary cylindrical cutter element in place within the stationary cylindrical cutter element.

FIG. 7 is a cross-section view of the assembled cutter.

DESCRIPTION OF THE PREFERRED EMBODIMENT FIGS. 1, 2 and 3 show rotating cylindrical cutter element 1. Ceramic insert 2 is shown removed from cavity 3. Ceramic insert 2 has a conduit 4 for passage of a filament or filaments. Conduit 5 in cutter element 1 is also for passage of filament. Cavity 6 is for motive means not shown. Orifices 7 are for fastening motive means. Rotary cutter edge 8 is shown in FIGS. 2 and 3. It can be seen rotating cylindrical cutter element has a truncated conical section 13 at one end.

FIGS. 4 and 5 show stationary cylindrical cutter element 10 with cavity 11 for rotating cylindrical cutter element 1. Cavity 11 has tapered section 12 to receive conical end of rotating cutter element 1. Stationary cutter edge 9 is shown in FIGS. 4, 5 and 6.

FIG. 6 shows a front view of rotating cylindrical cutter element 1 in place in cavity 11. FIG. 6 also shows ceramic insert 2 in place in cavity 3. Filaments can pass through conduit 5 between rotating cutter edge 8 and stationary cutter edge 9.

In use, filaments pass through conduit 5 in rotating cutter element 1 and conduit 4 in ceramic insert 2. When it is desired to cut the filament or filaments, rotating cutter element 1 is rotated clockwise by means not shown. Thus rotary cutter edge 8 moves toward stationary cutter edge 9. Movement of rotating element 1 continues until the filaments are sheared between the cutter edges 8 and 9.

The rotating cutter element is spring loaded by means not shown so that the conical section 13 is always urged forward into the tapered section 12. In this way the cutting portions of the self-sharpening edges, i.e., rotary cutter edge 8 and station cutter edge 9, are always kept in register.

The rotating cutter element 1 can be rotated by a rod 14 inserted into cavity 6 and rigidly mounted with pins 19 through orifices 7. This rod can be rotated with a crank radially and rigidly attached. The crank can be motivated by a fluid driven piston, electric solenoid or the like. Alternatively, the rod can be furnished with a cam follower and can be activated by the motion of a cam.

When in use in continuous textile processing on moving yarn, a defect detector can actuate the rotary filament cutter of this invention to cut out defects. An aspirator to convey yarn to waste storage can be used with the cutter of this invention to facilitate handling of defective yarn.

In FIG. 7, like numbers are used to describe like ele' ments in previous FIGS. l-6. The figure shows a spring 15 used to urge rotating cutter element 1 foward against stationary cutter element 10 at tapered surface 12. Spring 15 rests against retainer ring 18 which is secured to rod 14. Bearing-bushings 17 hold rod 14 in place and retainer ring 16 set in the slot in stationary cutter element holds the whole device within stationary cutter element 10. Spring 15 urges rotary element 1 3 ,793 ,9 1 7 3 4 forward by urging the unrestrained bearing-bushing l7 ceive said rotting cutter element, said cavity having forward. Pins 19 pass through orifices 7 to rigidly a cylindrical section and said cavity having a tamount rotary Cutte e em t 1 n rod pered section to receive said conical section of said We claim:

rotating cutter element, said tapered section being A rqtary l Cutter comprising centered on said cylindrical section, said tapered Z g3:322grg i$g gzfi iafi s$i i 3222a and section having openings in register with openings of 3 said conduit in said rotating cutter element, at least meanstfor rotating said rotating cylindrical cutter eleone of said tapered Section Openings having a men tlonary cutter edge,

Sald rotating miner ment havmg a.truncated P so that when said rotating cutter element is rotated, cal section said conical section having a conduit for passage of filaments said conduit passing perpen- Sald. rotary Cutter edge moves W and past sald dicular to the axis of said conical section and hav- Statlonary cutter edge to Shear filaments pres' ing a rotary cutter edge at the Opening of Said com ent in said conduit in said rotating cutter element, duit l 5 and said rotating cutter element being urged into said said conduit having a cylindrical ceramic insert, positapered Sectlon of said staltionarycylmdncfll Cutter tioned away from said cutting surface, and said inelement whereby h g Pomons 0f 531d rotary sert having an internal conduit in line with said Cutter dge and Said stationary cutter edge are alconduit so that continuous filament yarn can pass y kept in register and Said Cutter is Selfthrough both said conduits in a straight line, 20 sharpening and self-cleaning.

said stationary cutter element having a cavity to re- 3 x5 I UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,793,917 Dated Februarv- 26. l97 L lnvengofls) Thomas A. Flower Noel York Rothmaypr It is eertified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 2, line 16, "filament" should be -filaments;

Column 2, at line 31, a new paragraph added by amendment was not added here; it was added at the end of the Description of the Embodiments before the claims;

Column 2, line 43, "station" should be --stationary--;

Column 4, line 1, (olaim l) "rotting" should be --rotating--;

' gn 1 an seldthis' laa yd'f dcto ber 197:4.

(SEAL) n.

Att'e'stb' McCOY'M; GIBSON JR. C. DANN Attesting Officer Commissioner of Patents

Claims

1. A rotary filament cutter comprising a rotating cylindrical cutter element, a stationary cylindrical cutter element, and means for rotating said rotating cylindrical cutter element said rotating cutter element having a truncated conical section said conical section having a conduit for passage of filaments said conduit passing perpendicular to the axis of said conical section and having a rotary cutter edge at the opening of said conduit, said conduit having a cylindrical ceramic insert, positioned away from said cutting surface, and said insert having an internal conduit in line with said conduit so that continuous filament yarn can pass through both said conduits in a straight line, said stationary cutter element having a cavity to receive said rottinG cutter element, said cavity having a cylindrical section and said cavity having a tapered section to receive said conical section of said rotating cutter element, said tapered section being centered on said cylindrical section, said tapered section having openings in register with openings of said conduit in said rotating cutter element, at least one of said tapered section openings having a stationary cutter edge, so that when said rotating cutter element is rotated, said rotary cutter edge moves toward and past said stationary cutter edge to shear said filaments present in said conduit in said rotating cutter element, and said rotating cutter element being urged into said tapered section of said stationary cylindrical cutter element whereby the cutting portions of said rotary cutter edge and said stationary cutter edge are always kept in register and said cutter is self-sharpening and self-cleaning.