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Патент USA US2132240

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06¢. 4, 1938.
'
o‘ |__ HOPE ‘ _
2,132,240
MEANS FOR GRINDING CARD FLATS
Filed March 8, 1937
‘1
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4 Sheets-Sheet 1
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' ORV/LL15 L. Hops
Oct. 4, 1938.
o. L. HOPE
2,132,240
MEANS FOR GRINDING CARD FLATS
Filed March 8, 1957
4 Sheets-Sheet 2
OPV/LLE L. HOPE
Oct. 4-, i938.
O‘ L. HOPE
MEANS FOR GRINDING CARD FLATS
Filed March 8, 1937
4 Sheets-Sheet 5
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mm,
6
ORWLLE L. HOPE
0cm 4, 1938, '
0. L. HOPE
2,1323%
MEANS FOR GRINDING CARD FLATS
Filed March 8, 1957
4 Sheets-Sheet 4
ORv/LLE L. HOPE
2,132,240
Patented Oct. 4, 1938
UNITED STATES PATENT OFFICE
2,132,240
MEANS FOR GRINDING CARD FLATS
Orville L. Hope, East Gastonia, N. G.
Application March 8, 1937, Serial No. 129,644
2 Claims.
(Cl. 51-243)
This invention relates to a card grinding appa
ratus for grinding card ?ats and more especially
to means for properly positioning the flats rela
tive to the card grinder as the flat teeth are
ground thereby. In the grinding ‘of card flats
it has been the practice to guide the upper por
tion of, each end of the ?ats as they pass be
neath the grinding cylinder by a pair of slides.
These portions were held in sliding contact with
10 said slides by means of suitable pressure apply
ing means such as dogs which engaged the lower
side of the ?ats at two intermediate points,
each of the intermediate supporting points being
an appreciable distance from the end of the ?ats.
' In order to exert sufficient upward pressure at
each point to normally hold the upper side of
the card ?at against the two slides, an apprecia
ble amount of upward de?ection‘ was caused in
the central portion thereof thereby causing the
20 teeth in this central portion to be ground more
than the teeth at each end. This practice causes
what is commonly known as hollow ?ats which
in turn, causes defective carding when they are
in operation with the carding cylinder.
It is therefore, an object of this invention to
vprovide an apparatus for grinding the teeth on
card ?ats comprising a grinding cylinder, with
guiding means for positioning the ?ats in grind
ing relation thereto and a pair of. weighted sup
30 porting means disposed at each end and on the
lower side of said ?ats directly opposite said
guiding means for holding the card ?ats in proper
position relative to said guiding means and said
grinding cylinder. By providing the supporting
35 means oppositely, or directly beneath said guid
ing means, it is evident that the amount of
pressure exerted by the supporting means will
not in any way cause the central portion of the
card ?at to be de?ected upwardly. Therefore,
40 it is only necessary to provide an intermediate
supporting means to compensate for the weight
of the ?at itself. This is done, where necessary,
by providing a weighted support directly be
neath the central portion of the ?at to prevent
any downward de?ection thereof. Should the
upward supporting means be disposed several
inches from each end of the card flat and if only
enough upward pressure is exerted thereon to
compensate for the de?ection dueto the weight
50 of. the flat itself, then this upward pressure would
not be su?icient to hold. the top ends of the ?at
in contact with the guiding means during the
grinding operation.
It is a further object of this invention to
56 provide a card ?at having supporting means be
neath each end thereof normally pushing its
ends against a pair of guiding means, said guid
ing means comprising a pair of stationary beveled
surfaces which cause the ?at to be so positioned
that each of the teeth in the upper side of the 5
card ?at will occupy the same position relative
to-the grinding cylinder as the card ?at passes
thereby.
Some of the objects of the invention having
been stated, other objects will appear as the de- 10
scription proceeds, when taken in connection
with the accompanying drawings, in which:
Figure 1 is a side elevation of a portion of a
card machine showing my invention applied
thereto;
15
Figure 2 is a cross sectional detail view through
the carding machine taken along the line 2-2
in Figure 1;
Figure 3 is an enlarged detail View of the end
of, card ?at grinding apparatus which is also 20
shown in Figure 1;
Figure 4 is a vertical sectional view taken along
the line 4-4 in Figure 2;
Figure 5 is a sectional plan View taken along
25
the line 5-5 in Figure 3;
Figure 6 is an isometric view of the supporting
means for the other end of the card ?ats from
that shown in Figures 3, 4, and 5, one of the sup
porting means being shown in the left-hand por
tion of Figure 2;
Figure '7 is a vertical sectional View taken along
the line 1-4 in Figure 2;
Figure 8 is an enlarged detail view looking at
the end of the ?at showing its position relative
to the supporting means, guiding means, and
grinding cylinder when the ?at is passing be
neath the grinding cylinder.
Referring more speci?cally to the drawings,
the numeral l0 denotes the framework of a
suitable card machine which has rotatably 40
mounted as at H, a card cylinder [2 which has
teeth l3 therein, which normally cooperate with
the teeth I4 in card ?ats l5 during a carding
operation. The framework H] has mounted at
one end thereof a lap roll l6 which is fed beneath as
feed roll I‘! into licker-in chamber 18 and then
between the card cylinder I2 and the card ?ats l5
to card the ?bers and remove foreign matter
therefrom and to aline the ?bers. The card ?ats
M are secured to suitable chains 20 and 20’, said 50
chains being mounted on suitable conventional
rollers 21, 22, 23, and 24, which, in turn, are
supported by brackets 25, 26, 21 and 28,‘ respec
tively.
After continued use, it is necessary to sharpen 55
2
2,132,240
the teeth M in the card ?ats; therefore, a suit
able grinding mechanism has been employed,
comprising a pair of supporting stands 30 and 30'
which have brackets 3! and 3|’ adjustably se
cured to the upper end thereof by any suitable
means such as bolts 32 and 32' respectively. The
bolts 32 and 32’ clamp the brackets 3| and 3|’
to their support and the bolts 33 and 33’ hold
the brackets 3| and 3|’ in the adjusted position.
ll) The brackets 3| and 3|’ are adapted to support
a suitable shaft 35 upon which is mounted a
grinding cylinder 36. Suitable guides 31 and 31'
are secured to supporting stands 30 and 30’ by
means of bolts 38. Fixedly secured to the lower
surface of said guides are beveled strips 39 and
39' which strips normally guide the top sur
faces 4!! on each end of the card ?ats, when the
card ?at is in grinding position. Disposed di
rectly beneath the beveled strips 39 and 39’ and
20 also directly below the ends of card ?at I4 are
supporting means 42, 43 and 42' and 43’, the
supporting means 42 and 43 being adapted to
support the right-hand end of card ?at l4 as
shown in Figure 2, and the supporting means 42’
25
and 43' being adapted to support the left-hand
end thereof.
Levers, or supporting means 42 and 43 are
?xedly secured to stud shafts 44 and 45 which
in turn, are rotatably mounted in end support 30.
The other ends of shafts 44 and 45 have ?xedly
secured thereon levers 48 and 49 which have
weights 50 and 5| respectively, adjustably secured
on the ends thereof. By regulating the distance
at which a weight 50 or 5| is located relative to
the stud shafts 44 and 45, the amount of upward
pressure exerted by the supporting means 42 and
43 can be effectively regulated.’ The construc
tion of the weighted levers 42’ and 133’ is identi
cal, and therefore, no description will be made,
40 but like reference characters with prime notations
will be given to like parts.
The supports 33 and 30’ have integral there
with lower guide supports 55 and 56 which sup
port the lower ends of the card ?ats I4 prior to
their approach to grinding position and after
they have passed beyond the grinding position.
While the card ?ats are in grinding position, the
supporting means 42 and 43 ?exibly support the
flat in a position where the surfaces 40 and 40'
will engage the lower side of bevel strips 39 and
39’ respectively.
It is necessary to provide a, pair of weighted
supports such as 42 and 43 beneath each end of
the card ?at when the same is in grinding posi
55 tion because of the irregularity of the construc
tion of the lower side of each end. If only one
dog were provided a uniform upward pressure
could not be exerted under the entire breadth of
the ?at ends so that the upper surfaces 40 and 40’
60 of the ?at would be held in ?rm contact with
strips 39 and 39'. It is also necessary to overlap
the free ends of pressure applying means 42
and 43 so that both members will simultaneously
engage the ends of the ?at from the time it
65 comes to grinding position until after it has been
ground.
When it is desired to eifect a grinding opera
tion, a belt 60 is mounted upon pulleys 6| and 62,
and the cylinder 36 is caused to rotate in a
70 counter-clockwise manner in Figures 1, 3, 7 and 8.
At the same time the weights 50 and 5! and
their associated, parts are placed in their proper
position in order to exert the proper'upward
pressure beneath the lower ends of the flats. The
?ats M are then caused to rotate in a counter
4
clockwise manner in Figure 1 to thereby cause
the top ends of the teeth M to engage the periph
ery of grinding cylinder 36 in a manner shown
in Figure 8. It will be noted by referring to
Figure 9 that since the surfaces 40 on the end
thereof normally engage the lower beveled sur
face of the strip 39, which is shown in dotted
lines, the end of the card ?at will gradually move
downwardly away from the grinding cylinder as
the ?at is moved to the left in the direction of 10
the arrow; however, it will also be noted that the
point of each of the teeth will be ground exactly
at the same angle, although, the teeth in the
left-hand edge of the ?at are slightly shorter
than the teeth on the right-hand edge thereof. 15
This difference in length is very much exaggerated
in the drawings in order to properly illustrate
the principle involved. By so grinding the teeth
in the card ?at in this manner, when the teeth
are placed in carding position as shown in the
lower portion of Figure 7, the long teeth on the
right-hand side of the ?at in Figure 8 are dis
posed at the same distance from the card cyl
inder teeth l3 as the short teeth, since the bev
eled upper ends 46 and 40’ rest upon the ?exible 25
arch supports 63 and 63’ on each side of the
card cylinder, the periphery of the arch supports
being concentric with the periphery of the cyl
inder teeth. By grinding the ?at teeth in the
manner shown in Figure 8 the proper point is 30
ground on each individual tooth and the pointed
ends on all of the teeth fall in a plane which is
parallel to a plane passing through top beveled
surfaces 40 and 40'. By so grinding the heel
and'toe will be equidistant from the card cyl
inder when in operative position.
The dotted line 65, in Figure 8, represents the
line along which the dogs 42 and 43 exert up
ward pressure upon the lower side of ?at during
the grinding operation.
40
In order to compensate for the de?ection
caused by the weight of the ?at I4 a suitable
cross bar 66 has its ends ?xedly secured in the
supports 30 and 30’. Secured to the central por
tion of bar is a bracket 6'! by any suitable means 45
such as bolt 68, said bracket having pivoted as
at 69 a lever 70. This lever has the left-hand
portion thereof, (Figure '7), extending upwardly
and normally engaging the lower intermediate
portion of the ?at l4. Where the ?ats have been 50
properly designed as to strength it is seldom that
this pressure applying means is necessary; how
ever, in case of a very weak structure where the
stress caused by the grinding and the initial
weight of the flat will cause downward de?ection 55
in the central portion thereof, it is necessary to
provide a lever 70 pivoted as shown with a suit
able adjustable weight ‘H secured on the end
thereof. It is quite evident that if there is a
de?ection of the ?at in the central portion
thereof, that this point is the proper place to
apply the weight to remedy the defect.
As heretofore stated, should the weight be
applied at a short distance from each end, then
at least two of such devices as shown would
be necessary and at the same time it would be
very much harder to determine the amount of
upward stress necessary at these points to pro
duce} the desired upward de?ection at the cen
tral portion thereof; however, it would also be .70
necessary to add additional stress for holding
the ends’40 and 40' in contact with strips 39
and 39'. This additional stress, of course, would
cause an objectionable upward de?ection at the
3
2,132,240
center of the ?at and cause the teeth at the
point to be ground more than necessary.
It is therefore seen that I have provided a
ties of the ?ats in the same vertical plane in
which said ?xed cam means are disposed to hold
the ?ats against said cam means while the teeth
apparatus comprising a pair of guide ways for
properly positioning each ?at as it passes by
the grinding cylinder and means disposed di
thereof are engaged by said grinding cylinder,
and means for engaging the central portion of
the ?ats for holding their central portion in
the same horizontal plane occupied by the ex
rectly below the ?at ends and said guiding means
for exerting upward pressure against the lower
tremities of the ?ats while the ?ats are in grind~
ing position.
ends of the ?at to hold them in the proper po
sition relative to the cylinder.
In the drawings and speci?cation there has
been set forth a preferred embodiment of the
invention, and although speci?c terms are em
15 ployed, they are used in a generic and descrip
tive sense only, and not for purposes of limita
tion, the scope of the invention being set forth
in the appended claims.
I claim:
1. In a carding machine having a carding cyl
20
carding cylinder and a pair of endless chains
card grinding apparatus for grinding ?ats, said
inder equipped with card clothing provided with
teeth and having a pair of endless chains to
which the ?ats are secured and said ?ats hav
ing teeth therein for cooperation with the teeth
25 on the card clothing, apparatus for grinding
the teeth on the ?ats comprising a grinding
cylinder disposed transversely of the machine
and in alinement with the ?ats, ?xed cam means
for engaging the upper surfaces of the extremi
30 ties of the ?ats as they approach and move past
the grinding cylinder, a pair of weighted, piv
oted and oppositely directed levers having side
by side cam portions for engaging the extremi
2. In a carding machine having a frame, a
to which a plurality of toothed ?ats are secured,
apparatus for grinding the teeth on the ?ats com
prising a pair of brackets secured to the sides
of the frame, a ?xed cam on each bracket for
engaging the extremities of the ?ats as they are
moved past the cams, a grinding cylinder for
engaging the teeth in the ?ats, a pair of pivoted
levers having side by side end portions disposed
in parallel relation and having cam surfaces
thereon for engaging the extremities of the ?ats
on their lower sides in the same vertical plane
as that occupied by the said ?xed cams, a weight
on each lever for holding the said parallel end
portions against the said ?ats to press the ex
tremities of the ?ats against said cams while
the ?ats are being passed beneath the grinding
cylinder and a pivoted lever having a weight on
one end and a cam surface on the other end for
engaging the central portion of each ?at as it is ‘’
moved beneath the grinding cylinder.
ORVILLE L. HOPE.
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