US2384031A - Waste cutter - Google Patents

Description

p 1 M. L, HUDSON 2,384,031

WASTE CUTTER Filed May 1, 1944 WflJTE I za 4 l y/ MaliaaL/Yuafma Patented Sept. 4, 1945 V WASTE CUTTER Monlton L. Hudson, West Asheville, N. C., assignor to American Enka Corporation, Enka, N. 0., a

corporation of Delaware Application May 1, 1944, Serial No. 533,629

12 Claims.

This invention relates to a mechanism for cutting waste strand material from rotating supports. More particularly the invention is concerned with a knife mechanism adapted to be used for-the removal of waste yarn from driven godets in order that the waste may be removed or stripped from the godets without the necessity of stopping an entire machine whenever the waste accumulated on its godets requires removal.

In the production of rayon the usual viscose process involves the extrusion of the viscose solution into an acid spin bath and the conducting of the formed thread or yarn to a collecting bobbin or pot, the thread consisting of a multiplicity of filaments being subjected to stretching during its passage to the collecting device by being propelled over driven godets operating at different speeds to effect the desired stretch. After a period of operation. parts of filaments which have become severed from the thread body in its passage to the collecting device become attached to the respective godets and a band ofwaste yarn may be gradually built thereon. The presence of such bands of waste on the godets is objectionable and in fact these accumulations of waste will interfere with the efliciency of the equipment and eventually cause the yarns passing thereover to be entirely ruptured. In order to remove such waste, it is desirable to cut the bands while the godets are in operation as the godets are driven continuously and the machines themselves are seldom shut down.

It is an object of the present invention to provide a waste cutting mechanism in which the knife thereof is arranged to rotate with a rotating godet or the like and to be moved to cut through the band of waste while the godet is being rotated.

The invention further contemplates a portable waste cutter for rotating godets and the like in which a knife thereof is caused to be moved to a position for cutting the waste upon the partial positioning of the mechanism upon a guiding spindle extending from the godet, and in which the waste will be severed from the godet upon the further movement of the device upon the guiding spindle.

These and other objects and advantages will appear more fully from the following detailed description of the preferred embodiment of this invention when read in conjunction with the accompanying drawing wherein:

Figure 1 is a perspective view of a godet having an extended guiding spindle over which a cutting mechanism formed in accordance with this invention has been partially applied;

Figure 2 is a longitudinal elevation of the structure shown in Figure 1 partially broken away to illustrate the manner in which the knife is caused to be operated and the position which the parts formed as a part of lug ll.

assume when the mechanism has reached the end of its movement during the cutting operation; and

Figure 3 is a partial view of the structure specifically' illustrated in Figure 2 in which the mechanism is shown in its initial position before being moved over the guiding spindle sufliciently to cause the knife to assume its operative position.

In the drawing, a corrugated glass godet I, such as is used in the spinning of rayon yarn, is shown as mounted upon a shaft 2. The godet is clamped to bushing 3 by means of a mandrel 4. Mandrel 4 is provided with an axial extension or guide post 5 which extends beyond the edge of the godet a sufficient distance to permit the guiding and supporting of the cutting mechanism 8. The cutting mechanism 6 may be utilized in connection with any one of a number of godets since it is a portable device and may be removed from or applied to the extensions or guides 5 of various godets or similar yarn supports.

The cutting mechanism comprises a housing 1 having at one end a recess 8 adapted to receive the guide 5 of the godet. The end of the housing opposite that containing the recess is reduced to provide an annular extension upon which handle 9 ,is secured. The handle is rotatably secured upon the housing by means of ball bearing assembly III as shown in Figure2.

The L-shaped member is a lug or bracket which may be formed integral with housing I and is shown extending laterally therefrom. Lug II is bifurcated as at I2 for the purpose of receiving arm l3 between its upstanding legs and the arm I 3 is pivoted between the legs of the lug by means of pin H. g

A spring I5 is positioned within a bore in the lug II as shown in Figure 2 and bears upon the lower surface of arm lit at a point in advance of pivot pin H in a manner to bias the said arm upwardly. Knife blade ii of the cutting device is preferably made of stainless steel and is removably mounted in arm I 3. Arm I3 is slotted at I! to receive the knife blade. Blade I8 is secured in position by means of a headed pin l8, which pin is normally prevented from being dislodged from the arm by means of an offset extension I! Thepin, however, may be dislodged when the cutting assembly and godet are disengaged, by depressing arm l3 in a manner as shown in Figure 3. When arm I3 is depressed sufficiently, the head of, pin it clears the extension l9 and the pin may then be readily removed.

The end of arm I! remote from blade I6 is pivotally connected to a link 20 by means of pin 2!. Link 20 is formed of a sleeve 22 closed at its upper end with legs extending therefrom between which the said arm is secured. Within the sleeve 22 a spring 23 is mounted, which spring has connected to its lower end a link 24. A pin 25 is utilized to connect the spring'to the link 24 and the ends of the pin extend into slots as at 26 .formed adjacent the lower end of the sleeve 22. Due to this arrangement, the upward movement of the link 24 within the sleeve compresses spring 23, thus applying a. resilient pressure against the closed end of link 20 which in turn urges arm l3 upwardly about its pivot so that blade [6 will be moved downwardly to operative position as shown in Figure 2. 7

Link 24 is pivotally connected to the free end of a dog 21, which dog is mounted within a slot- 28 arranged in housing I from which lug ll laterally extends. 'I'he'dog 21 is pivotally connected to the housing I at 29. Housing 1 is provided With a recess 8 into which the slot for the dog 21 opens. Thus, when the cutting assembly is disengaged from the godet, one end of dog 2! is permitted to move downwardly into the recess 8 as in Figure 3.

In operation the cutter is held by its handle and slipped over the rotating guide 5. Figure 3 shows the cutter with the guide it is entering, and the knife blade is clear of the godet. As the. unit is pushed further, guide contacts dog 21 and causes the dog to move upwardly. Dog l9 pushes against the spring 23 thru link 24, thus causing arm I 3 to move into a position where the knife is in the groove on the rotatin godet as shown in Figure 1. The knife assembly then rotates with the godet. As the cutter is pushed still further, the knif contacts and severs the band of waste material, after which the unit is withdrawn.

It is believed that the foregoing description conveys a good understanding of the objects and advantages of this invention. It is to be understood, however. that while I have described one specific form of m invention, modifications may godet, a handle axially mounted on the unit and rotatably secured thereto, a lateral bracket on the unit adjacent its end remote from said handle, a knife supporting arm mounted for oscillation on said bracket, meansextending into the unit and connected to the arm for causing the movement of the arm upon insertion of the device upon a guide, a spring normally urging the arm in a direction to cause the means to extend into the unit, and a knife detachably connected to the end of the arm remote from the said means.

5. A knife assembly for cutting a band of strandular material from a rotating godet comprisinga unit having a portion cooperating with guiding means located axially of a godet, a handle on the unit, a lateral'bracket on the unit adjacent one end, a knife mounted for oscillation on the bracket, a spring engaging the knife to urge it to move about its pivot point, means arranged between the knife and said guiding means to cause the knife to be oscillated to operative position as the knife assembly is moved relative to the guiding means to thereby sever the strandular band upon the godet. Q

6. A knife assembly fOr cutting a band of strandular material from a rotating godet comprising a unit having a portion for cooperating with axially arranged means of a godet to guide the assembly into operative relation with the be made in the shape and arrangement of the material is to be cut for properly aligning the r same, a handle axially mounted on the un t and rotatably secured thereto, a lateral extension on said unit, an arm mounted on said extension. and a knife connected to the arm and extending in a direction longitudinally of the device.

2. A device for cutting waste strandular material from a rotating support comprising a rotatable unit provided with a recess adapted to be fitted over a guide extending from the support and rotated therewith, a bracke laterally extending from the unit, a knife mounted for oscillation on said bracket, and means for oscillating the knife to cutting position.

3. A device for cutting waste strandular material from a rotating godet comprising a rotatable unit provided with axially arranged guiding means, a bracket laterally extending from the unit, a knife mounted for oscillation in said bracket, means connected to the knife for oscillating the same to cuttin ositions, and means normally urging the knife to inoperative position.

4. A knife assembly for cutting a band of strandular material from a rotating godet comprising a unit provided with a recess adapted to be fitted over a guide extending axially from a godet, a lateral bracket on the unit, a knife blade holder pivoted to the bracket, means normally urging the knife blade holder to move in onedirection, means extending into the unit and having a portion for engaging the guiding means of the godet, a link connecting said last mentioned means to the knife blade holder, a knife blade detachably secured in the free end of the knife blade holder by means of a headed pin, said bracket being provided with an extension which normally overlies the head of said pin to prevents its removal until the blade and knife'blade holderare oscillated to an inoperative position to cause the pin to clear said extension, whereby upon the movement of the knife assembly with respectto the axially arranged guiding mean-s'of the godet the knife blade holder and the knife blade will pivot in a direction counter to that in which they are normally urged so that the knife blade will be placed in operative position and sever the strandular band upon the godet upon further movement of the cutting assembly with respect to said guide means.

7. A knife assembly for cutting a band of strandular material from a rotating godet com-- prising a unit provided with a recess adapted to be fitted'ovei'='a* guide extending axially from a.

godet, a lateral bracket'on the unit, a knife pivoted to the bracket, a spring engaging the knife at one side of the pivot point, a dog mounted within the unit and having a portion arranged for movement within the body recess, link means .connecting the knife to the dog whereby upon the positioning of the knife assembly over the laterally extending guide of the godet the dog within the body recess will engage the said guide and cause the knife to pivot-in a direction counter to that urged by the spring and the knife will thereby be placed in operative position to sever the strandularband upon the godet upon further movement ofthe cutting assembly upon the guide.

8. A knife assembly for cutting a band of strandular material from a rotating godet comprising a unit having a' portion cooperating with guiding means located axially of a-godet, a handle mounted on the unit, a knife pivoted to the unit, a spring engaging the knife at one side of the .pivot point, a link means connected to the knife at the opposite side of the pivot point, said link means engaging the guiding means located axially of the godet and causing the knife to move against the tension of the spring for moving the knife to Operating position as the said connecting means is further moved with respect to the said guiding means.

9. A knife assembly for cutting a band of strandular material from a rotating godet comprising a unit provided with a recess adapted to be fitted over a guide extending axially from a godet, a handle axially mounted on the unit and rotatably secured thereto, a knife holder pivoted to the unit, a spring contained within the unit and engaging the ife holder at one side of its pivot point, a dog mounted within the unit and having a portion arranged for movement within the unit recess, a hollow link connected to the knife holder adjacent its end remote from the point of engagement of the spring with the support, a link connected to the dog and to the hollow link, said link being provided with a pin which extends through slots in the wall of the hollow link to provide for a loose connection between the link and hollow link, a spring within the hollow link normally urging the links apart, a knife blade detachably secured in the unit being provided with an extension which normally overlies the head of said pin to prevent its removal until the knife and holder are oscillated to an inoperative position to cause the pin to clear said extension, whereby upon the positioning of the knife assembly over the laterally extending guide of the godet and dog within the unit recess will engage the said guide and cause the knife holder and knife blade to pivot in a direction counter to that urged by the spring and the knife blade will thereby be moved to sever the strandularband upon the godet as the cutting assembly is moved over the guide.

10. A knife assembly for cutting a band of strandular material from a rotating godet comprising a unit provided with a recess adapted to be fitted over a guide extending axially from a godet, a handle axially mounted on the unit and rotatably secured thereto, a knife pivotally mounted on the said unit, a spring contained within the unit and engaging the knife at one side of its pivot point, a dog mounted within the unit and having a, portion arranged for movement within the unit recess, a hollow link connected to the knife adjacent its end remote from the point of engagement of the spring therewith, a link connected to the dog and to the hollow link, said link being provided with a pin which extends through slots in the wall of the hollow link to provide for a loose connection between the link and hollow link, a spring within the hollow link normally urging the link outwardly therefrom, whereby upon the positioning of the knife assembly over the laterally extending guide of the godet the dog within the unit recess will engage the said guide and cause the knife to pivot in a direction counter to that urged by the spring within the unit and the knife will thereby be moved to sever the strandular band upon the godet as the cutting assembly is moved over the guide.

11. A knife assembly for cutting a band of strandular material from a rotating godet comprising a unit provided with a recess adapted to be fitted over a guide extending axially from a godet, a handle axially mounted on the unit and rotatably secured thereto, a lateral bracket on the unit adjacent its end remote from the handle, a knife blade holder pivoted to the bracket with its ends extending beyond the bracket, a spring contained within the bracket engaging the knife blade holder at; one side of the pivot point, a dog mounted within the unit and having a portion arranged for movement within the unit recess, a hollow link connected to the knife blade holder adjacent its end remote from the point of engage ment of the spring with the support, a link connecting the dog and the hollow link, said link being provided with a pin which extends through closed slots in the wall of the hollow link to provide for a loose connection between the link and hollow lnk, a spring within the hollow link normally urging the links apart and a knife blade detachably secured in the free end of the knife blade holder by means of a headed pin, said bracket being provided with an extension which normally overlies the head of the pin to prevent its removal until the knife and knife blade holder are oscillated to an inoperative position where the pin is clear of said bracket extension, whereby upon the positioning of the knife assembly over the axially extending guide of the godet the dog within the body recess will engage said guide and cause the knife blade holder and knife blade to pivot in a direction counter to that urged by the spring within the bracket and the knife blade will thereby be moved to sever the strandular band upon the godet as the cutting assembly is moved over the guide.

12. The combination of a godet and knife assembly for cutting waste yarn bands from the godet while it is in operation, comprising a godet, a drive shaft therefor, an axially arranged spindle extending beyond the godet, a unit fitting over the said spindle, a handle axially mounted on the unit and rotatably secured thereto, a lateral bracket on the unit adjacent its end remote from the handle, a knife blade holder pivoted to the bracket with its ends extending beyond the bracket, a spring contained within the bracket engaging the knife blade holder at one side of the pivot point, a dog mounted within the unit and having a portion arranged for movement within the unit recess, a hollow link connected to the knife blade holder adjacent its end remote from the point of engagement of the spring with the support, a link connecting the dog and the hollow link, said link being provided with a pin which extends through closed slots in the wall of the hollow link to provide for a loose'connection between the link and hollow link, a spring within the hollow link normally urging the links apart and a knife blade detachably secured in the free end of the knife blade holder by means of a headed pin, said bracket being provided with an extension which normally overlies the head of. the pin to prevent its removal until the knife and knife blade holder are oscillated to an inoperative position where the pin is clear of said bracket extension, said unit being adapted to be withdrawn sufficiently to cause the dog to disengage the godet spindle but being adapted to be moved over the guide whereby the dog will cause the knife to be moved against the tension of the spring for positioning the knife in operative position to sever the band of yarn on the godet.

MOULTON L. HUDSON.

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