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Патент USA US3057030

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Oct. 9, 1962
K. L. HERTEL
3,057,01 9
APPARATUS FOR TAKING SAMPLES OF FIBROUS MATERIALS
Filed Jan. 13, 1960
5 Sheets-Sheet 1
Oct. 9, 1962
3,057,019
K. L. HERTEL
APPARATUS FOR TAKING SAMPLES OF FIBROUS MATERIALS
5 Sheets-Sheet 2
Filed Jan. 15, 1960
Qk.V‘
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1.:
Krzxawzzr L 1553721;
Oct. 9, 1962
K. L. HERTEL
3,057,019
APPARATUS FOR TAKING SAMPLES 0F FIBROUS MATERIALS
Filed Jan. 13, 1960
5 Sheets-Sheet 3
22 4
INVENTOR.
?ll/F1115’ L. Henna
Och 9, 1962
K. L. HERTEL
3,057,019
APPARATUS FOR TAKING SAMPLES OF FIBROUS MATERIALS
5 Sheets-Sheet 4
Filed Jan. 13, 1960
M
5,74
8
'
INVENTOR
454/
/
'
.
'
ATTORNEY
Oct 9, 1962
K. L. HERTEL
3,057,019
APPARATUS FOR TAKING SAMPLES OF‘ FIBROUS MATERIALS
Filed Jan. 15, 1960
5 Sheets-Sheet 5
INVENTOR.
lira/111ml ?fwa’rzz
United States Patent O??ce
,
3,057,019
Patented Oct. 9, 1962
2
1
FIG. 6 is a fragmentary view similar to FIG. 5 but
showing the sample holder in closed position;
3,057,019
FIG. 7 is a transverse section on the line 7--7 of
APPARATUS FOR TAKING SAMPLES 0F FIBROUS
MATERIALS
Kenneth L. Hertel, Knoxville, Tenn., assignor to Univer
sity of Tennessee Research Corporation, Knoxville,
FIG. 5;
FIG. 8 is a fragmentary view on an enlarged scale show
measuring the ?ber length of ginned cotton, apparatus for
ing rnOre clearly the sample holder and associated parts
illustrated in FIG. 3;
FIG. 9 is a fragmentary end elevation of the sample
holder, showing partly in section a device for insuring
that the sample holder is in open position as it begins its
movement;
this general purpose being shown in my two prior Patents
No. 2,299,983, issued October 27, 1942, and No.
the line 10——10 of FIG. 9 looking in the direction of the
2,404,708, issued July 23, 1946.
arrows;
FIGS. 11 and 12 are transverse sections on an en
Tenn, a. corporation of Tennessee
Fiied Ian. 13, 1960, Ser. No. 2,170
19 (Zlaims. (Cl. 19-65)
This invention relates to improvements in apparatus for
FIG. 10 is a fragmentary side elevation Viewed from
The ?rst of the above patents relates to an optical 15
method and instrument for measuring the ?ber length of
cotton contained in a pre-arranged sample, the ?bers of
which have been combed out into substantially parallel
relation. The second patent relates to apparatus for pre
paring such samples.
larged scale through the sample holder, showing the parts
thereof in different positions;
FIG, 13 is a fragmentary plan view of the threaded
core of the sample holder;
20
FIG. 14 is a transverse section on the line 14-14 of
FIG. 13;
FIG. 15 is a fragmentary plan view of the body of the
The apparatus disclosed in said second Patent No.
2,404,708 comprises a pair of freely movable combs by
sample holder;
means of which random bits or tufts of cotton, picked
FIG. 16 is a transverse section on the line 16-—16 of
of one of the combs, can be combed out by manipulating 25 FIG. 15;
FIG. 17 is a fragmentary transverse section on an en
the other comb until the ?bers are straightened out into
up with the ?ngers, and manually placed upon the teeth
larged scale showing the dol?ng device illustrated at the
bottom of FIG. 3;
FIG. 18 is a fragmentary elevation generally similar
to
FIG. 4, but with certain parts omitted, showing a modi
30
bits of cotton and placing them on a comb by hand is
?ed construction of arm for co-operation with the sample
avoided, and in which a comb, moving in a ?xed path,
holder; and
gathers a representative sample from a stationary mass
FIG. 19 is a side elevation showing this arm and a
of cotton. Such apparatus can not only provide samples
substantially parallel relation.
The general object of the present invention is to devise
apparatus by means of which the necessity for picking up
much more easily and rapidly, but also can produce more
uniform samples.
A speci?c object is to provide improved means for
supporting the mass of cotton in position to be e?ectively
contacted by the comb, and improved means for mount
ing the comb for movement in a ?xed path past such
40
mass.
Another speci?c object of the invention is to devise an
improved comb or sample holder having means by which,
after the sample has been collected on the teeth, it may
be clamped or locked in position on the teeth while the 45
?bers are being straightened out into parallel relation.
A still further object is to provide improved means for
combing or straightening out the ends of the ?bers locked
in the sample holder.
This means for combing or straightening out the ?bers 50
comprises a piece of card clothing, and yet another ob
ject of the invention is to devise effective means for clean
ing o?f the excess cotton that becomes embedded in this
card clothing.
With the above and other objects in view, and to im
prove generally on the details of such apparatus, the inven
tion consists in the construction and arrangement of parts
hereinafter described and claimed, and illustrated in the
accompanying drawings, forming part of this speci?cation,
fragment of the cylinder on which it is mounted.
Referring to the drawings in detail and more particu
larly ?rst to FIGS. 1, 2 and 3 thereof, my improved ap
paratus comprises a U-shaped bracket 1 having upper
and lower jaws 2 and 3. This is adapted to be applied to
the edge of a table x or the like by means of one or more
clamping screws 4 working through the lower jaw 3 and
preferably bearing against a socket member 5 which may
have a layer of felt or other soft material 6 interposed
between it and the table.
The ‘bracket 1 has a horizontally projecting portion 7 in
which is mounted one end of a shaft 8 held in position by
a set screw 9. It will be noted that this shaft preferably
extends at an angle of about 45°.
Fixedly secured to the upper end of the shaft 8 is the
bottom 10 of a hollow cylinder 11. This cylinder has
upper and lower rims 12 and 13. The wall of the cylin
der is composed in part of a curved plate 14 having open
ings 15 extending therethrough. By reference to FIGS. 1
and 2 it will be seen that these openings are relatively
large compared with the distance between them and that
55 the openings are circumferentially staggered so that every
arcuate line drawn on the plate will pass through a num
ber of these openings.
The part of the cylindrical wall not occupied by the
plate 14 is formed of a solid plate 17 on which is sup
and in which:
60 ported a strip of card clothing 16. The points of the
FIG. 1 is a side elevation of the complete apparatus;
card teeth 16a are inclined in a clockwise direction as
FIG. 2 is a front end elevation of the same;
viewed
in FIGS. 2 and 3. Preferably the end 16b of
FIG. 3 is a transverse section through the apparatus
each too-th lies on the same radial line as the point 16c
shown in FIGS. 1 and 2;
FIG. 3a is an enlarged detail showing the preferred 65 where the tooth enters the cloth backing, as shown in
FIG. 3a. This form of tooth is less likely to be bent out
shape of the card teeth;
of shape by the cotton.
FIG. 4 is a fragmentary elevation on an enlarged scale
At the lower side of the cylinder between the perfo
of a portion of the upper front edge of the machine show
rated plate 14 and the card clothing 16 is an open re
ing the sample holder in two different positions;
entrant channel 18, the purpose of which will hereinafter
FIG. 5 is a plan view of the sample holder as it appears
appear.
when in open condition, parts being broken away and
Mounted to rotate freely on the shaft 8 between the
parts being shown in section;
'
3,057,019
bracket 7 and the cylinder bottom It)‘ is a carriage 19‘
(see FIGS. land 3). A’ portion of this carriage extends
downwardly and forwardly as shown at 2!} and is formed
with a cylindrical portion at the bottom as illustrated in
FIG. 3.
'
'
Fixedly mounted on this carriage is a channel member
21 and in this channel member is removably received and
4
FIGS. 2, 5 and 6, for the purpose hereinafter explained,
and by_reference to FIG. '10 it will be seen that the notch
in the bracket 28 is of su?icient depth to permit this pin
to pass through it.
,
Thus it will be seen that as the carriage and sample
holder begin to swing toward the right, from the posi
tion shown in FIGS. 3 and 8, the crank arm 25 Will pass
supported the sample holder 22.
between the cam surfaces 29 and 3t} and, whatever the
As best shown in FIGS. 11 and 12, this sample holder
initial position of this might have been, it will be auto
comprises an elongated body 22 rectangular in cross 10 matically swung to the position shown in FIG. 9, thus
section having a cylindrical bore extending longitudinally
placing the sample holder in open condition.
thereof, and a core rotatable therein.
The bore of the
In order to resiliently hold the crank arm 25 in closed
position, I provide on the inner edge of the arm a spring
the core 24 is similarly threaded as at 24s to work inside
pressed ball 32, a spring 33 being con?ned by a set screw
of the threaded nut.
15 34, as shown in FIG. 5. This ball 32 projecting from
The body or nut 22 has an open slot extending longi
the edge of the crank arm 25 is adapted to engage the
tudinally along one side, this slot having a high edge
?xed handle 23 to hold the arm in closed position.
322a and a low edge 22b. As clearly shown in the draw
As shown in FIGS. 2 and 4, an arm 35 is pivotally
ing, the threaded core 24 projects up through this slot.
mounted at one end on a shaft 36 carried by a projection
Secured to the high edge 22a of the body 22 is a
12a on the rim 12, a spring 37 being provided for nor
comb device comprising a series of horizontally extend
mally maintaining this arm in the position shown in
ing teeth 27 projecting inwardly partially across the above
FIG. 2 and in dotted lines at the extreme right of FIG. 4.
mentioned slot. I ?nd that the best results are obtained
This arm 35 has a beveled outer end 38 from which pro
by making these teeth 27 of individually fabricated needle
jects a pin 39, this pin being located near the center of
body 22 is threaded as at 220 like an ordinary nut while
points, these needle points being disposed in spaced
parallel relation as shown in FIG. 5 and secured to the
edge 22a of the body as by means of solder 22d. The
spacing of these needle points is not de?nitely critical
but may vary from about 12 to 20 per inch.
Along a zone extending longitudinally of the core 24
the threads 240 are cut away at one side to produce a ?at
channel-shaped recess 24a. When the core 24 is turned
so that this channel underlies the projecting needles or
teeth 27 as shown in FIG. 11, the sample holder may be
25 the arm so that a shoulder 40 is provided between the
pin and the edge of the arm. As the. sample holder is
moved in a counterclockwise direction around the cylin
der, the pin 31 carried by the crank arm 25 engages this
shoulder 40, as shown in dotted lines in FIG. 4, and by
reason of the fact that it also engages the pin 39' it carries
the arm 35 with it. As the arm 35 swings on its pivot,
from the position shown in dotted lines to the position
shown in full lines in FIG. 4, the crank arm 25 will be
swung in a counterclockwise direction. As the sample
said to be in open position. In other words, the clear 35 holder moves slightly further to the left, as viewed in
ance between the needle points and the bottom of the
channel permit ?bers to enter between the needle points
and the bottom of the channel.
Referring again to FIGS. 11 and 12, it will be seen
that when the core 24 is rotated slightly in a counter
clockwise direction from the position shown in FIG. 11,
the bottoms of the threads 240 are brought under and
in substantial contact with the needle points as illustrated
in FIG. 12', thus changing the sample holder to closed
position.
n An angularpshaped handle member 23 is rigidly secured
to one end of the body 22 and the core 24 is rotated as
described by means of a crank arm 25 projecting from a
hub 26 secured to the end of the core. When this crank
FIG. 4, the pin 39 will pass under the pin 31 and the arm
35 will be snapped back to normal position by the spring
37. The crank arm 25 will, however, remain in the
position to which it has been turned, due to friction. In
this position it is in closed condition.
In operation, the operator grasps a mass of ?brous ma
terial such as raw cotton and presses it against the inside
of the perforated plate 14, as shown at A in FIG. 3. The
pressure causes portions or tufts of the cotton to protrude
through the openings 15, as shown at B. Then when the
carriage is swung around the cylinder, as indicated by
the arrow, the sample holder being in open position, the
teeth 27 will ‘gather or collect ?bers from the protruding
portions B, as shown at C in FIG. 11. The purpose of
arm extends substantially horizontally as shown in FIGS. 50 using a perforated plate is to present to the teeth of the
5, 9 and 10, the sample holder is in open position as
comb approximately equal tufts of cotton in order that the
shown in FIG. 11. Whereas if the crank arm is swung in
sample collected may be as uniform as possible. As the
a counterclockwise direction into some such position as
sample holder completes its travel over the plate 14 and
shown in full lines in FIG. 4, the sample holder is placed
arrives at the position shown in full lines in FIG. 4, it will
in closed position as illustrated in FIG. 12.
' have been moved to closed position by the arm 35, as
It will be understood that in operation, the carriage
above described, in which closed position the ?bers are
19 on which the sample holder is mounted is swung in
locked against the teeth by engagement of the threads 240,
a counterclockwise direction around the shaft 8. It will
as shown in FIG. 12. At the same time, the ?bers col
further be understood that by reason of the weight of the
lected by the teeth are clamped between the edge 24d
carriage and of the various instrumentalities hereinafter
of the core threads, and the edge 22e of the body threads
described mounted thereon, the carriage is normally main
22c. (See FIGS. 12 and 16.)
tained by gravity in the position shown in FIGS. 1, 2 and
From the position shown in FIG. 4, the sample holder,
3, with the sample holder adjacent the re-entrant channel
carrying the ?bers which it has collected, passes on around
18 formed in the cylinder. It will now be apparent that
the cylinder and over the card clothing 16, which card
the ‘purpose of this re-entrant channel is to afford ready
clothing tends to straighten out the ?bers so that they lie
access to the sample holder so that it may be easily re
in substantially parallel relation. The card clothing also
moved and replaced.
_
serves to remove from the holder any unclamped ?bers.
In order to assure that the sample holder starts on 1ts
The ?bers, after having been combed out by the card
travel around the cylinder in open position, a special
clothing, will present somewhat the appearance shown at
bracket 28 is secured to the rim 12 of the cylinder ad
C in FIG. 5. The sample holder, carrying the combed
jacent the channel 18 and projects downwardly into the
out ?bers, can then be removed from the channel 21 for
path of movement of the crank arm 25. This bracket has
purposes of test and measurement.
a notch on its underside having ?aring cam surfaces 29‘
From an inspection of FIGS. 11 and 12, it will be seen
and 30 on either side. A pin 31 is set rigidly into the
outer edge of the crank arm 25, as clearly shown in 75 that the core threads 240 are slightly ?attened or ground
3,057,019
5
off, as shown at 24b. This ?attened portion, when the
holder is in closed position as in FIG. 12, is substantially
horizontal, and is for the purpose of permitting the sam
ple holder to run as close as possible to the card clothing.
In order to clean the excess ?bers from the card clothing
16, I provide a doffer roll 41 rotatably mounted in a
bracket 42, 42a pivoted at 43 on the carriage 19. This
material will project slightly through said openings and
protrude from ‘the other side of said plate, and a comb
mounted to travel in a ?xed path parallel with said plate
over such protruding portions in contact therewith so as
to gather ?bers therefrom.
2. Apparatus according to claim 1, in which the plate
is in the form of a section of a hollow cylinder, and the
doffer roll has an operating knob 44 at its upper end so
comb is mounted to swing in an arcuate path about the
roll 41 is spaced a substantial distance from the cylinder,
rial from a loose mass, comprising a stationary hollow
axis of said cylinder and around the outer surface there
that it may be turned by hand. Incidentally, by grasping
this knob, the operator can readily swing the carriage 10 of.
3. Apparatus for producing samples of ?brous mate
around the cylinder, as described. Normally, the do?er
cylinder, means for supporting said cylinder with its
axis inclined at an angle to the horizontal, said cylinder
swing it inwardly on its pivot 43 into close proximity to 15 composed partly of a plate having a plurality of open
ings therein, a carriage mounted adjacent said cylinder
the surface of the cylinder. The bracket 42, 42a is nor
to rotate about the inclined axis thereof, and a comb
mally locked in the position shown in FIG. 3 by a bolt 45
as shown in FIG. 3, but when it is desired to use it to clean
the excess ?bers from the card clothing, it is necessary to
device removably carried at one side of said carriage
urged by the spring 46 into engagement with a latch 48
parallel with said axis in position to travel over the outer
(see FIG. 1), a knob 47 being provided at the upper end
of the bolt 45 by means of which the bolt may be moved 20 surface of said plate as the carriage is swung around
said axis, the side of said carriage carrying said comb
out of engagement with the latch so as to permit the
device ‘being heavier than the opposite side, so that the
bracket 42, 42a and do?'er roll to swing in toward the
carriage is maintained by gravity in a position in which
cylinder.
In order to clean off the cotton ?bers which may collect
said comb device lies at the lowermost side of the
on the doffer roll, I provide the cleaning device shown at 25 cylinder.
4. Apparatus for producing samples of ?brous mate
the bottom of FIG. 3 and in FIG. 17. This consists of
rial from a loose mass, comprising a stationary hollow
a do?ing comb 56 carried by a bar 52, which bar also
cylinder, means for supporting said cylinder with its axis
carries at each end a guide rod 53. Slidably mounted on
inclined at an angle to the horizontal, said cylinder com
the comb 56 and guide rods 53 is the downwardly bent
posed partly of a plate having a plurality of openings
portion 55 of a plate 54. This plate 54 is rigidly con
therein, a carriage mounted adjacent said cylinder to ro
nected at 57 with one end of a link 58, the other end of
which is pivoted at 59 to the carriage 19.
The bar 52 is carried by a curved plate 50 which ?ts
tate about the inclined axis thereof, and a comb device re
the guide rods 53 and comb 56, so as to strip the ?bers
from the comb. When in full line position, of course the
comb 56 is in contact with the doffer roll, and when this
roll is turned by means of the knob 44, the ?bers col
entrant channel to permit ready access to said comb de
vice for removal thereof.
movably carried at one side of said carriage parallel with
said axis in position to travel over the outer surface of
around the similarly curved end of the portion 20 of the
carriage and is also pivotally mounted on the pivot rod 35 said plate as the carriage is swung around said axis, the
side of said carriage carrying said comb device being
43. An operating knob 51 is secured to this plate.
heavier than the opposite side, so that the carriage is
Thus it will be seen when the plate is swung in a clock
maintained by gravity in a position in which said comb
wise direction, by means of this knob, from the full line
device lies at the lowermost side of the cylinder, said
position to the dotted line position shown in FIG. 3, the
portion 55 of the plate 54 will be pushed outwardly along 40 cylinder being formed at its lowermost side with a re
lected thereon are cleaned off by the comb.
In order to balance the carriage 19‘ and cause it to
swing easily, I preferably provide a counter weight 60‘ at
the end of the carriage opposite the parts just described.
5. Apparatus for collecting test samples from a loose
mass of ?brous material comprising a stationary hollow
cylinder the wall of which is composed partly of a plate
having a plurality of openings therein, said openings be—
ing relatively large as compared with their distance apart,
whereby, when a mass of loose, ?brous material is pressed
against the inside of said plate, portions of said material
In FIGS. 18 and 19, I have illustrated a modi?ed form
of the means shown in FIG. 4 for setting the sample hold 50 will project slightly through said openings and protrude
from the outside of said plate, a comb device extending
er in locked position. Instead of the relatively heavy,
spring-actuated arm 35 in FIG. 4, I employ, in FIGS.
parallel with the axis of said cylinder and mounted to
18 and 19, a light arm or ?nger 61, made of a steel rod,
and having its end bent as at 62, to engage the pin 31 of
the crank arm 25. This arm is not spring-actuated but
is freely pivoted in a bushing or bearing 63, and is re
swing about said axis at such a radial distance therefrom
that said comb device sweeps closely around the outer
surface of said cylinder, said comb device, in its initial
movement, passing over said plate and gathering a sample
turned by gravity to rest against the stop screw 64.
To hold the arm in position and protect it, I provide an
of ?brous material from the portions protruding through
the openings therein, and means carried by said cylinder,
overlying guard plate or shield 65. This is supported by
the screw 64 and another screw 66, set into the rim 12.
and over which said comb device passes by a further move
ment in the same direction for straightening out the ?bers
This is spaced from the rim, as shown in FIG. 19.
of said sample into substantially parallel relation.
Piv
oted on the screw 66, beneath the cover 65, is an ad
6. Apparatus for collecting test samples of ?brous ma
justable stop member 67, against which the arm impinges
terial from a loose mass comprising a stationary hollow
to limit its swinging movement.
The arm 65, formed simply of a piece of metal rod,
may be considered an expendable part which may easily
be replaced if accidentally bent or broken.
What I claim is:
1. Apparatus for producing samples of ?brous mate
rial from a loose mass, comprising a stationary plate
cylinder composed partly of a plate having a plurality of
openings therein and partly of a sheet of card clothing,
said openings being relatively large as compared with their
having a plurality of openings therein, said openings
being relatively large as compared with the distance be
distanceapart, whereby, when a mass of loose, ?brous
material is pressed against the inside of said plate, portions
of said material will project slightly through said openings
and protrude from the outside of said plate, and a comb
device extending parallel with the axis of said cylinder
and mounted to swing about said axis at such a radial
distance therefrom that said comb device sweeps closely
pressed against one side of said plate, portions of said 75 around the outer surface of said cylinder, said comb de
tween them, whereby when a mass of ?brous material is
3,057,019
vice, in its initial movement,‘ passing over said plate and
gathering a sample of ?brous material from the portions
protruding through the openings therein, and by a further
movement, passing over said card clothing so that the ?bers
of said sample are straightened out by said clothing into
substantially parallel relation.
7. Apparatus for collecting test samples of ?brous
material from a loose mass comprising a stationary hollow
material, a sample holder comprising an elongated body
having a longitudinal bore open at one side, a core ro
tatable in said bore, and a series of transversely extend
ing teeth forming. a comb secured to said body- along one
edge of- said open bore, said. teeth overlying said bore
and core.
'
r
'.
-
11. In apparatus for forming test samples of ?brous
material, a sample holder comprising an elongated body
cylinder composed partly of a plate having a plurality of
having a longitudinal bore open at jone'side, a core ro
openings therein and partly of a sheet of card clothing,
tatable in said bore, said core being substantially cylindri
cal but having a longitudinal channel formed therein, a
said openings being relatively large as compared with their
distance apart, whereby, when a mass of loose, ?brous
series of transversely extending teeth forming a comb se
material is pressed against the inside of said plate, por
cured to said body along one edge of said open bore, and
tions of said material will project slightly through said
means for rotating said core to bring said channel into
openings and protrude from the outside of said plate, 15 a position immediately under the projecting ends of said
and a comb device extending parallel with the axis of
teeth.
I
said cylinder and mounted to swing about said axis at
12. In apparatus for forming test samples of ?brous
such a radial distance therefrom that said comb device
material, a sample holder comprising an elongated body
sweeps closely around the outer surface of said cylinder,
having a longitudinal bore open at one side, a core rotat
said comb device, in its initial movement, passing over
able in said bore, said core being generally cylindrical
said plate and gathering a sample of ?brous material from
but having thereon a series of circumferential grooves,
the portions protruding through the openings therein, and
and a series of transversely extending teeth forming a
by a further movement, passing over said card clothing
comb secured to said body, said teeth projecting partially
so that the ?bers of said sample are straightened out by
across the open side of said bore and being so positioned
said clothing into substantially parallel relation, and means
as to be received tangentially in said grooves.
also movable about the axis of said cylinder for cleaning
13. A sample holder according to claim 12 in which
off the excess ?bers collected by said card clothing.
the core is threaded, and the body is a nut working on
8. Apparatus for collecting test samples of ?brous
such threads.
material from a loose mass comprising a stationary hollow
14. In apparatus for forming test samples of ?brous
cylinder composed partly of a plate having a plurality of ' material, a sample holder comprising an elongated body
openings therein and partly of a sheet of card clothing,
having a longitudinal bore open at one side, a core rotat
said openings being relatively large as compared with
able in said bore and ?lling the open side thereof, said
their distance apart, whereby, when a mass of loose,
core being generally cylindrical but having thereon a
?brous material is pressed against the inside of said plate,
series vof circumferential grooves, said core being cut
portions of said material will project slightly through said 3-5 away at one side to form a longitudinally extending chan
openings and protrude from the outside of said plate, and
nel of a depth at least as great as that of said grooves,
a carriage mounted adjacent said cylinder to swing about
the axis thereof, a comb device mounted on said carriage
at such a radial distance from said axis that it sweeps
a series of transversely extending teeth forming a comb
secured to said body, said teeth projecting partially across
the open side of said bore and spaced apart the same dis
closely around the outer surface of said cylinder, said 40 tance as said grooves, and means to rotate said core so
comb device, in its initial movement, passing over said
as to either cause said grooves to envelop said teeth or
plate and gathering a sample of ?brous material from
cause said channel to underlie said teeth.
the portions protruding through the openings therein,
15. In apparatus for forming test samples of ?brous
and by a further movement, passing over said card cloth
material, a sample holder comprising an elongated body
ing so that the ?bers of said sample are straightened out 45 having a longitudinal bore open at one side, a core rotat
by said clothing into substantially parallel relation, and
able in said bore and ?lling the open side thereof, said
a doifer roll also mounted on said carriage and positioned
core being generally cylindrical but having ‘thereon a
to engage said card clothing to clean o? the excess ?bers
series of circumferential grooves with ridges between
collected by said clothing.
them, said core being cut away at one side to form a
9. Apparatus for collecting test samples of ?brous ma 50 longitudinally extending channel, a series of transversely
terial from a loose mass comprising a stationary hollow
extending teeth secured to said body adjacent the open
cylinder composed partly of a plate having a plurality
side of said bore and forming a comb, said teeth being
of openings therein and partly of a sheet of card cloth
spaced apart the same distance as said grooves, and means
ing, said openings being relatively large as compared with
to adjust said core to diiferent angles so that either said
their distance apart, whereby, when a mass of loose,
channel may be brought under said needles to “open”
said comb to permit it to gather ?bers, or said grooves
may be brought under said needles so that the collected
?bers are clamped between the edge of the open side ‘of
said bore and the ends of said ridges adjacent said chan
?brous material is pressed against the inside of said plate,
portions of said material Will project slightly through
said openings and protrude from the outside of said plate,
and a carriage mounted adjacent said cylinder to swing
about the axis thereof, a comb device mounted on said 60 nel, to “close” said comb.
/
carriage at such a radial distance from said axis that it
16. In apparatus of the class described, and in combi
sweeps closely around the outer surface of said cylinder,
nation, a sample holder comprising a comb device having
said comb device, in its initial movement, passing over
an “open” position, permitting it to collect ?bers from a
said plate and gathering a sample of ?brous material
mass, and a “closed” position in which the collected
from the portions protruding through the openings there t ?bers are locked in position, a ?xed hollow cylinder the
in, and by a further movement, passing over said card
wall of which comprises a perforated plate, whereby,
clothing so that the ?bers of said sample are straightened
when a mass of ?brous material is pressed against the
out by said clothing into substantially parallel relation, a
inside of said plate, portions of said material will project
doifer roll mounted on said carriage and positioned to
slightly through the perforations and protrude from the
engage said card clothing to clean oif the excess ?bers 70 outside of said plate, card clothing carried by a portion
collected by said clothing, and a do?ing comb also
of said cylinder wall not occupied by said plate, means
mounted on said carriage and constructed to move into
for mounting said comb device to swing about the axis
engagement with said doffer roll to remove the ?bers
of said cylinder at such a radial distance therefrom that
it sweeps closely around the outer surface thereof and
therefrom.
10. In apparatus for forming test samples of ?brous 75 passes ?rst over said plate and then over said card cloth
3,057,019
ing means carried by said cylinder and co-operating with
said comb device and brought into operation during the
initial movement of said comb device for assuring that
said comb device is in “open” position as it passes over
said plate so that it may collect ?bers from the portions
of material protruding through the perforations in said
respect thereto for locking the collected ?bers in position
on the comb.
119. The method of gathering sample ?bers from a mass
of loose, ?brous material Which comprises pressing the
mass against one {side of a plate having closely spaced
openings therein, so that portions of the materials will
project slightly through said openings and protrude from
plate, and means also carried by said cylinder and co—
the other side of said plate, and passing a comb over the
operating with said comb device for automatically shift
surface of that side of said plate from which said portions
ing said comb device to “closed” position as it passes
10 protrude so as to gather ?bers from such protruding
over said card clothing.
portions on said comb.
17. In apparatus for forming test samples of ?brous
material, a sample holder comprising an elongated body,
References Cited in the ?le of this patent
a series of transversely extending teeth secured to said
body and forming a ‘comb for collecting ?bers to be
UNITED STATES PATENTS
tested, and means rotatably mounted Within said body 15
11,534
Sargent ______________ __ Aug. 15, 1854
for locking the collected ?bers in position on the comb.
287,506
Crabb _______________ __ Oct. 30, 1883
18. In apparatus for forming test samples of ?brous
1,932,095
Webb _______________ __ Oct. 24, 1933
material, a sample holder comprising an elongated body,
a series of transversely extending teeth secured to said
FOREIGN PATENTS
body and forming a comb for collecting ?bers to be 20
243,215
Great Britain _________ __ Nov. 26, 1925
tested, and means carried by said body and rotatable with
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