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Патент USA US3090278

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May 21, 1963‘
Filed July 17,. 1959
13.. w. EDWARDS
2 Sheets-Sheet. 1v
May 21, 1963
Filed July 17, 1959
2 Sheets—Sheet 2
United States Patent 0 ” cc
Patented May 21, 1963
Donald W. Edwards, Wilmington, Del., assignor to E. I.
du Pont de Nemours and Company, Wilmington, Del.,
a corporation of Delaware
Filed July 17, 1959, Ser. No. 827,901
6 Claims. (Cl. 83-400)
This invention relates to the handling of strands and, 10
more particularly, to the processing of a plurality of
strands advancing away from a continuously operating
bundle and removing the severed, continuously advanc
ing strands from the zone by suction.
Further advantages of the process and apparatus of
the invention will become apparent in the follow de
scription wherein reference is made to the accompanying
drawings in which:
FIGURE 1 is a plan view of the apparatus of the
present invention shown in conjunction with a plurality
of advancing strands; and
FIG. 2 is an elevational view of the apparatus shown
in FIG. 1, parts having been broken away and shown
in section to reveal details of construction.
In the drawings, a cut-down apparatus has been illus
trated which apparatus comprises generally a support
The term “strand,” as used herein, is intended to in
clude either a single ?lament, a gathered plurality of 15 10, strand-severing means 12, a strand-gathering hook 14‘,
such ?laments, or the threads, yarns, narrow webs, and
an actuator 16 for moving the hook toward the severing
the like produced from ?laments or from staple ?bers.
means, an aspirator 18 for withdrawing severed strands
It is well known in the textile industry that a spinning
and a condition responsive solenoid valve 20 by means
process, wherein ?lament-forming material is extruded
of which actuator movement is initiated.
from a spinneret, is normally not stopped when a defec~
A pair of leads 22 couple solenoid valve 20 to a
tive conditions arises during the handling steps which
sensing device (not shown) in which an electrical circuit
follow extrusion. Such defects are usually encountered
is closed upon the detection of an abnormal operating
in the form of roll wraps, breaks, or similar defects which
condition. Valve 2i) admits air under pressure into one
appear in the downstream handling of the strands.
of the conduits 24, 26. Conduit 24 discharges into the
Rather than interrupt the spinning process, the practice is
actuator 16, which has been illustrated as a double-acting
for the operator to cut down all the strands and then
piston-cylinder assembly, through a flow control valve
introduce them to a fluid actuated aspirator of the type
28. ‘Conduit 24 simultaneously feeds aspirator 18, which
shown by Miller in US. Patent 2,667,964. Since it is
may be of the type disclosed by Miller, through branch
also customary in the art to have a single operator patrol
conduit 30. Conduit 26 discharges into the other end
a multiplicity of spinning positions, it is obvious that a 30 of the assembly 16. Hook 14 is attached to the piston
defective condition may go unnoticed for a considerable
rod 32 by an irregularly shaped arm 34. Arm 34 is
period of time with resultant damage to the process
apertured to receive a pin 36 which extends through a
equipment and a consequent interference with orderly
coil intermediate the ends of hook 114 and through arm
operating procedures. An alternative practice has been
34 into threaded engagement with a stud 38. Hook 14,
to employ sensing devices which function to detect the
which is of a suitable spring metal, has one end an
various defects and to actuate cut-down or stop-motion
equipment thereby interrupting the downstream delivery
chored in an opening 4b in arm 34.
A plurality of
strands, indicated by the numeral 42, is restrained by one
from a given source. The extruded material is then per
or more ?xed guides 44, so that strands 42 pass axially
mitted to accumulate on the ?oor beneath the spinning
through the area swept by book 24 in its translatory
position until the operator has had a chance to remedy 40 movement towards severing means 12.
the sensed defect and restore the position to a normal
The severing means 12 chosen 'for illustration is a plate
operating condition. In such equipment, it is customary
type kni-fe which includes a ?xed plate 46 and a pivoted
to provide a separate cutting device for each of the ad
knife blade 48. Blade 43 is attached to plate 46 by a pin
vancing strands.
50 and a nut 52 which acts on a spring washer 54.
The most important object of the present invention is
pivoted blade 48 is biased to the open position by a coil
to provide an improved process and apparatus for cut
spring 56 which has one end 58 anchored to blade 48
ting down and disposing of all the strands advancing
and its other end 60 in engagement with a pin 62 on plate
from a spinning position upon occurrence of a defect in
46. Blade 48 has an ‘abutment ‘64 which is within hte
one or more of the strands.
path of travel of stud 38 upon translatory movement of
Another important object of the invention is the pro 50 the arm 34 so that blade 48' is closed against the bias of
vision of an apparatus in which but a single cut-down
spring 56 when a bundle of strands is delivered thereto
device and aspirator are required for the plurality of
by book 14. For best results, the blades should be of
strands advancing from a spinning position.
tool steel and the cutting edges should be ground.
A further object of this invention is to provide a proc
After the strands have been severed by blade 48, they
ess and apparatus in which the cut-down device and as~ 55 are picked up by and aspirated through a tube 66v of
pirator are actuated directly and automatically in re
aspirator 18 to ‘a suitable waste collection point.
sponse to an undesirable operating condition.
In operation, therefore, energizat-ion of solenoid valve
With these and other objects in view, the apparatus of
20 by the sensing device admits air under pressure to
the present invention comprises generally the provision of
actuator 16 and the aspirator 18 through conduit 24. All
a support situated adjacent the path of travel of the
of the strands 42, including those in which no defect has
occurred, are gathered by hook 14 ‘and delivered as a
strands, severing means positioned at one side of the ad
bundle to the severing zone ‘from which the cut strands
vancing strands, a gathering hook positioned at the other
are withdrawn by aspirator 18‘. When the source of the
side of the strands, an actuator for moving the hook
defective strand condition has been remedied, the operator
across the strand path of travel toward the severing
means, an aspirator positioned adjacent the severing 65 inactivates‘ the sensing device by throwing a laming switch
(not shown) which functions to hold valve 2% in the de
means for withdrawing the severed strands by suction,
and a condition responsive element for initiating move—
ment of the actuator and withdrawal of the cut strands
energized position. After string-up and the like, the spin
ning position is placed in automatic operation by moving
laming switch to a position in which the sensing device
by the aspirator. The process of this invention involves 70 the
is in a ready condition.
the steps of gathering the strands into a bundle, moving
The apparatus disclosed herein has utility in conjunc
the bundle laterally to a severing zone, severing the
tion with any processing apparatus wherein one or more
strands pass axially between two process points. It may
be employed, for example, in the cold drawing process
disclosed by Sharp in US. Patent No. 2,851,732, in which
means including a plate ?xed on the support at one side
of the path of travel of the strands and a blade pivotally
mounted on the plate; spring means biasing the blade to
a strand~receiving position; a ?uid actuated piston-cylin
der assembly on the support; a strand gathering hook;
means attaching the hook to the piston of said assembly
for movement of the hook across said path toward said
blade, the latter having an abutment thereon, said attach
ing means including a stud aligned With the abutment for
instance the cut-down apparatus is installed at a location
where the bundle has been subdivided into smaller
It is apparent that many changes and modi?cations may
be made in the disclosed cut-down apparatus without
departing from the spirit of the present invention which
is accordingly intended to be limited only by the scope of
pivoting the blade against the bias of said spring means,
thereby actuating said severing means; an aspirator posi
tioned adjacent said knife blade 'for picking up and dis
the appended claims.
-I claim:
posing of gathered and cut continuously advancing
1. In an apparatus for processing at least one con
tinuously advancing strand: a support situated adjacent
the path of travel of the strand; strand-severing means
including a plate ?xed on the support at one side of said
path of travel and a blade pivotally mounted on the plate
for swinging movement to and from a closed, str-and-.
severing position; a hook normally positioned on the op
posite side of said path ‘from said severing means, said
hook being mounted on said support for movement across
strands; and a condition responsive valve coupled with
the assembly and said aspire-tor for the simultaneous
delviery of ?uid thereto.
5. In an apparatus for processing at least one con
tinuously advancing strand: a sup-port situated adjacent
the path of travel of the strand; strand-severing means
mounted on the support at 'one side of said path of travel,
said severing means including a ?xed plate and a pivotally
said path to the vicinity of said severing means and in
cluding a part engageable'with said blade for swinging
mounted ‘knife blade; spring means normally biasing the
means situated adjacent said blade for picking up and
support ‘for movement across said path to the vicinity of
said severing means and including a part engageable with
said blade for pivoting the latter to a closed position
blade to an open, strand-receiving position; a hook nor
the latter to said closed position; an actuator connected
mally positioned on the opposite side of said path ‘from
to said hook to facilitate its movement; and strand removal 25 said severing means, said hook being mounted on said
disposing of the severed, continuously advancing strand.
2. In an apparatus for processing a plurality of con
tinuously advancing strands: a support situated adjacent
against the bias of said spring means; an actuator con
the path of travel of the strands; strand-severing means 30 nected to said hook for moving it across said path; and an
on the support at one sideot said path; a strand-gathering
aspirator having a tube terminating adjacent said sever
element normally positioned on the opposite side of said
ing means for picking up and disposing of the severed,
continuously advancing strand. '
path, said element being mounted on said support for
movement across said path toward said severing means
6. The apparatus of claim 5 wherein said actuator is a
and including a part engageable with said severing means 35 double-acting piston-cylinder assembly and wherein a
' for its actuation; a fluid actuator connected to said element
for moving it across said path; a suction device having an
condition responsive valve is provided for simultaneously
feeding fluid under pressure to» said assembly and said
inlet positioned adjacent said severing means for picking
up and disposing of gathered ‘and severed continuously
References Cited in the ?le of this patent
advancing strands; and condition responsive valve means
coupled with the actuator and said suction device for the
delivery of fluid thereto.
Dietrich _____________ __ Nov. 2,
3. The apparatus or" claim 2 wherein said strand
Hires _______________ .._ June 19,
severing means comprises ?rst and second knife blades
Taylor ______________ __ Aug. 1.4,
respectively ?xed to and pivoted on said support, and 45 2,384,031
Hudson ______________ .._. Sept. 4,
spring means biasing said second blade to an open posi
Bauer ______________ __ Aug. 14,
tion for receiving said strands, there being an abutment on
Bailiff ________________ __ Jan. 8,
said second blade within the path of travel of saidpart
for pivoting said second blade to a closed position.
4. In an apparatus for processing a plurality of con 50
tinuously ‘advancing strands: ‘a support; strand-severing
France ______________ __ June 18, 1934
Italy ________________ __ May 14, 1956
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