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Патент USA US2131768

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Oct. 4, 1938.
2,131,768' '
Filed Aug. 21, 19:56I
5 sheets-sheet 1
í.' ihr/Mull
Oct. 4,’1938.
Filed Aug. 2l, 1936
5 Sheets-Sheet 2
Oct. 4, 1938.
2,131,768 i
Filed Aug. 21, 193e
5 sheets-sheet 5
_ Oct. 4, 1938.
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Filed Aug. 21, 1936
5 Sheets-Sheet 4
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Oct. 4, 1938.
Filed Aug. 21, 1936
5 Sheets-Sheet 5
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Patented Oct. -4, 1938
David C. Turnbull, Mishawaka, Ind., assignor to
` American Foundry Equipment Company, Mish
awaka, Ind., a corporation of Delaware
Application August 21, 1936, Serial No. 97,099
9 Claims.
This invention relates to apparatus for treat
ing metal articles..
In cleaning, polishing, hardening, or otherwise
treating the surfaces of metal articles by pro
jecting a stream of treating particles there
against, it is desirable to manipulate the articles
so that the various surfaces of each article are
porting surface. The article- supporting and
tumbling bars may be provided with suitably
shaped cam-like blocks fixed thereto or each bar
may include a generally cylindrical shaft formed
with suitably positioned grooves or flanges. The 5
articles may be deposited on the conveyor from
above the conveyor and may be removed by a
chute extending from the discharge end. How
fully and eñiciently treated. It is also desirable
that‘the processbe carried out continuously, in ' ever, if desired, a rotatable feed drum and a dis
order to eliminate the necessity for shutting dowr. charge drum may be provided for supplying the
the apparatus when supplying the articles to the articles to the conveyor and removing them there
from or both. The drum is disposed adjacent the
apparatus and removing them therefrom.
According to the present invention, the articles end of the conveyor and is formed with spaced,
to be treated are deposited on a conveyor having inclined abutments, comprising lugs, ñanges or
15 an arcuate, trough-like supporting surface. The the like, adapted to advance the articles along 15
the drum when the latter is rotated.
conveyor comprises a series of individually mov
The invention provides a method whereby
able elements having lugs adapted to‘engage the
' articles and cause them to tumble or turn, the lugs articles to be treated may be positively, effectively
also serving to advance the articles along on the and uniformly treated. The articles are tumbled
about on the vconveyor and each article is car 20
conveyos and ¿through a stream of treating mate
rial. The articles are fed continuously into the ried into the abrasive stream -and subjected to
apparatus at one end, passed through the stream thorough uniform treatment. The tumbling ac
while undergoing a forward tumbling action and tion also assists in shaking loose from the articles
are thereafter discharged from the apparatus at
the other end. One or more abrasive streams of
fanlike divergent shape each extending in the
direction of the general forward movement of
the articles through the apparatus operate to uni
' formly and thoroughly clean all exposed surfaces
. v of the articles as they are tumbled and progres
sively advanced through the conveyor. Thus by
reason of the cooperative relationship between the
fan-like movement of the abrasive particles-and
the uniform tumbling movement of the articles
in the conveyor, highly effective cleaning and
treating results are attained.
The apparatus for carrying out the process ac
cording to the invention includes one or more
abrasive throwing wheels of the rotary centrif
ugal type, each having means for controlling the
direction of flight of the abrasive, operating in
synchronism with a conveyor having an arcuate
trough-like supporting- surface and adapted to
rust, scale or other adherent foreign matter. The
length of the treating period may be» positively
controlled by proper adjustment of the speed of
rotation of the conveyor bars.
The apparatus is relatively simple, yet strong
and rugged in construction, and the various parts
which receive substantial wear can be quickly and 30
easily removed for repair or replacement. The
apparatus is substantially automatic in operation
and requires a minimum of attention.
An object of the present invention is the prei:
vision of an improved, economical and eilicient 35
apparatus for cleaning, polishing, hardening or
otherwise treating 'the surfaces of the articles,
whereby »the operation may be carried out con
tinuously and substantially automatically.-
carry articles through the stream and turn them
about therein. The arcuate article suppoting sur
face is constituted by a plurality of longitudinally
Another object of the invention is the pro 40
vision of apparatus for treating metal articles
which-is simple, rugged, eilicient and economical
and which uniformly and effectively treats all of
the surfaces of the articles._
Another object of the invention is the provision 4 5.
of a combined rotary centrifugal throwing wheel
extending, generally parallel and relatively closely
or Wheels having means associated therewith for
spaced bars.
The bars are `mounted for indi
controlling the `direction of flight of treating par-.
vidual rotation and are provided with spaced lugs
or abutments which serve to advance the articles
upwardly along the side wall of the arcuate sur
ticles to produce a fan-like stream and a convey
face to a point from which they tumble toward
the lower portion of the surface. The abutments
preferably have inclined wall portions adapted to
advance the articles longitudinally along the sup
ing mechanism for advancing articles alo'ng said r50
stream and for tumbling them about in said
Still another object of my inventionis the
provision of a novel mechanism for continuously
and automatically supplying articles to be treated 55
to the conveying mechanism for treatment and
for removing the articles from said conveying
mechanism after treatment.
Various other features and advantages of the
invention will be apparent from the following
particular description and from aninspection of
the accompanying drawings.
Although the novel features which are
lieved‘to be characteristic of this invention
10 be particularly pointed out in the claims
pended hereto, the invention itself, as to its
Each projector wheel generally comprises a plu
rality of spaced and generally radially arranged
throwing blades I6 which extend from adjacent
the periphery of the wheel to inwardly short of
the center to deñne a circular opening 22.
Disposed in the circular opening 22 is an impeller
23 having a plurality of radially arranged vanes
by referring to the following description taken in
connection with the accompanying drawings
24 which may be fixed to rotate with the blades
I6. Surrounding the impeller 23 is a control
member 25 having a discharge opening 26. The
control member is mounted independently of the
blades I5 and may be adjusted to shift the clock
dial position of the discharge opening 26 where
by the abrasive discharged from the wheel may be 20
directed as desired. Suitable supporting means
such as side plates I1 and I8 may be provided
for the blades I6. The wheel I5 may be mounted
part thereof, in which:
a side elevational view of one form of
suitable for carrying out the present
certain of the parts being shown
20 broken away andin section in order to expose
to view certain interior details of construction;
Fig. 2 is an enlarged transverse cross vsectional
view of the apparatus taken along line 2--2 of
Fig. 1;
for rotation on a hub I9 carried on a shaft 20
Fig. 3 is an enlarged end elevational view of
the apparatus shown in Fig. 1;
Fig. 4 is an enlarged perspective view of one
which may be mounted in bearings 2| on the
of the conveyor roll blocks;
Fig. 5 is a fragmentary side elevational view
30 showing a modified form of apparatus employing
rotatable supply and discharge mechanisms, por
tions of the apparatus being shown broken away
to expose the interior;
Fig. 6 is a longitudinal cross-sectional view of
the apparatus taken along the line 6-6 of Fig. 5;
Fig. '7 is a fragmentary transverse cross-sec
tional view showing a modified form of apparatus
employing a modified type of conveyor rolls; and
Fig. 8 is a transverse cross-sectional view of
the apparatus of Fig. 7, this view being taken
along line 8-8 of Fig. 7.
In the following description and in the claims,
various details will be identified by speciñc names
for convenience, but they are intended to be as
generic in their application as the art will permit.
Like reference characters denote like parts in the
several figures of the drawings.
In the drawings accompanying and forming
part of this specification, certain specific dis
are preferably rotated in opposite directions,
whereby to increase the angular range of the
components of the abrasive streams.
jects and advantages, and the manner in which
it may be carried out, may be better understood
forming a
Fig. 1 is
streams extend over substantially the entire
length of the conveyor 5. Where a plurality of
projector wheels are employed, certain of them.
closures of the invention is made for purposes of
explanation, but it will be understood that the
details may be modified in various respects with
out departure from the broad aspect of the in
Referring now particularly to Figs. 1 and 2 of
the drawings, there is shown apparatus including
a housing I having an inlet 2 and outlet 3 and a
conveyor 5 extending longitudinally through the
housing from the inlet 2 to the outlet 3. Pro
60 jecting into the inlet 2 is a charging vestibule- 6,
having an inclined floor 1, the vestibule being
closed by one or more flexible curtains 8. Ex-_
tending from the outlet 3 is a discharging vesti
bule I0 having a downwardly inclined floor II,
the vestibule being closed by one or more flexible
curtains I2.
suitably mounted in position to project a
stream of treating material into the housing I is
a centrifugal abrasive projector wheel A, here
70 inafter more fully described. A suitable number
of additional projector wheels B and C may be
top wall of the housing I.
'I'he wheel A may be driven from a suitable
source of power, such as a motor 3l, connected
through a suitable drive, such as belt drive 32,
to the shaft 20. Upon energization of the motor 30
3I, the impeller 23, side plates I1 and I8 and
throwing blades I6 are rotated as a unit, the con
trol member 25 remaining stationary. Suitable
treating material, hereinafter referred to as
“abrasive” is supplied to the wheel through a feed
pipe 33 extending through an opening I4 in the
side plate I'I and terminating adjacent the im
peller 23. The abrasive may be stored in a suit
able hopper (not shown) preferably located at a
higher level than the wheel so that the abrasive 40
can flow from the wheel by gravity through a
suitable pipe such as the pipe 34.
It is to be understood that the term “abrasive”
as herein used is intended to include suitable
treating material both that which is inherently
abrasive and that which exerts a smoothing and
polishing action. The abrasive may include
smooth steel shot, cracked steel grits, quartz sand
or other granular materials suitable for cleaning,
polishing, hardening or otherwise modifying the
surface characteristics of the articles treated.
When the wheel is rotated as described and
abrasive is supplied thereto the abrasive is hurled
by impeller 23 through the opening 26 in the con
trol member 25 and into the path of the rotating
throwing blades I6. The abrasive is urged along
the leading faces of the throwing blades I6 and
projected therefrom adjacent the periphery of
the wheel I5 by combined centrifugal and radial
The abrasive spreads out in a fan-like
stream having components extending throughout
a considerable range of angularity in the plane
of rotation of thewheel I5. The stream forms an
elongated, generally rectangular impingement
pattern on a horizontal plane disposed below the
wheel and extending lengthwise of the conveyor.
Other factors remaining constant, the direction
of flight of the abrasive may be adjusted by suit
able adjustment of the clock dial position of the
control member 25. Also, the direction of the
stream may be altered by mounting the Wheel for
provided, if desired, as for example, where it is ' rotation in a reverse direction.
desired to provide apparatus of relatively large
capacity. Preferably, suflicient projector wheels
75 are provided so that the treating stream or
A suitable opening 21 is provided in the top
wall o-f the housing I to permit the abrasive
stream a to be projected into the housing and 75
against the castings or articlesÍsupported upon
the conveyor 5. If desired, the wheel'may beso
mounted that a portionl of the wheel projects into
the housing. -A suitable housing' 28 may be pro
"vided for enclosing the upper portion of the.
Bearing 6I is preferably mounted in a bearing
wheel, and one or more baille plates 36 may de
housing I for repair or replacement.
C_arried pn one end of each shaft 5I isa sprocket
pend _from the top wall of. the housing I to pro-I
housing 62, detachably supported in an opening
59 in the end wall 63 of the housing. Preferably,
the opening 59. is `of sufficient size to permit the
corresponding roll 5!)v to be removed from the
tect various adjacent portions of the housing. If , 64. The sprockets 64 may be .driven from a suit- .
desired, certain of the portions» of the apparatus able source of power, such as a motor 65,‘which
10 which are subject to wear by _reason of flying or 4may drive a speed reducer 66 and a suitable drive 10
' rebounding abrasive particles may be covered 61 connected to a shaft 68 mounted inl bearings 69
ywith protective jackets or the „like formed of on the top wall of the housing I. Carried on the
resilient material such as rubber or rubber fabric. forward lend. of the shaft 68 is a sprocket ‘I6
Disposed below Ithe conveyor 5 is a floor which around which is trained a chain 1|,.also trained
.15 may be shaped to form a hopper 35 adapted to over all of the sprockets 64. -Upon energization of 15
receive and collect abrasive which has been dis
the motor 65, the shaft 68 is rotated and allA of the
charged from the wheel. A conveyor, such as the sprockets 64 are driven to rotate their respective
screw conveyor 36, may be disposed in the hopper shafts 5I and thus rotate the rolls 56 in the desired
for conveying the spent abrasive out of the hous- „
20 ing I. A transverse trough 38 in which is dis
An end head or wall member .86 may be mounted 20
posed a screw conveyor 39 may be provided for "
adjacent the charging end (right-hand end as
conveying the spent abrasiveffrom the hopper'35
viewed in Fig. 1) of the conveyor 5 for preventing
articles from dropping oiî the conveyor at thisv
end. The head 86 may includeda circular facing
member 8| carried by a plate 82 connected as by
studs 83 to a plate 84. The head4 86 may-be fixed
to an elevator 4I, which may be disposed outside
ofthe housing I for returning the spent abrasive
25 to the storagehopper (not shown). The screw
conveyors 36 and 39 and the elevator 4I may have
' sprockets 31, 46 and 62 respectively attached
t hollow hub 85 rotatably mounted on a stub
thereto, and suitable driving'means may be pro
si. ift 86 by a bearing 81 which may be 'a roller or
vided for driving the sprockets whereby to actu ‘ball bearing. The stub shaft 86 is journaled in a
30. ate the elevating apparatus.
The conveyor 5 preferably is formed from a
plurality of generally parallel and closely spaced
rolls 56 _extending longitudinally within the hous
ing I and arranged to form an arcuate trough
35 like'supporting surface disposed under and in the
path of the abrasive streams a, b and c. Prefer
ably, the conveyor is arranged so that the lower
most portion lies directly under the abrasive
ing. A suitable take-up device 89 may be provided
for maintaining the shaft 86, bearing 81, and hub
85 tight relative to the bearing 88. The head 86
is rotatable and hence when the rolls 56 are driv
eney for the articles tqjam or unduly rub against
the head, but the latter rotates as much as neces
the conveyor may be considerably higher than
the other, as will hereinafter appear.
a, b and c against articles supported on the con
Each roll 56 may comprise a shaft' 5I carrying a
` plurality of blocks 52 arranged on the shafts in
staggered arrangement. Referring particularly
to Fig. 4, each block> may be formed as an oval
disc and may .have a central boss 56 projecting
from each sideïface.
en to tumble the >articles about there is no tend
sary to permit free tumbling of the articles.
The operation of apparatus is as follows:
The projector wheels A, B and C are operated in
the manner described to project abrasive streams
streams a, b and c and the side walls extend up
wardly therefrom on both sides. One side wall of
bearing 88 mounted on the end wall 68 of the hous
veyor 5, the stream c being directed reversely rel
atively to the streams a and b. The articles to be
treated are deposited in the charging vestibule 6 45
and slide along the floor .'I and tumble on to the
conveyor 5. The motor 65 is energized and drives
A rectangular opening 55 ~ the rolls 58 to tumble the articles on the trough- i
may extend through the centralportion’of the
block 52 for receiving the rectangular portion. 56
50. of the shaft 5I. Oneface of the block 52 may be
formed with tapered faces 51 and 58 adjacent
like surface provided by the rolls 56. The rolls- 56
are driven in synchronism so that the ends of the 50
blocks 52 successively strike against-each article
and impart an impulse thereto in a direction. (to
_ the `ends 'for the purpose ofl exerting a sidewise ' the right as shown in Fig. 2) to cause the article
pushing action on the articles treated, as herein
to travel upwardly along the'side wall of the con
veyor. When the article climbs upwardly along 55
A series of blocks 52 are disposed on the rec
the side wall of the conveyor to a position where-`
tangular portion‘5‘6 of each shaft with the faces . in they exceed their angle of repose, they tumble
of the bosses 54 of adjacent blocks substantially down over the ascending articles toward the low
after more fully. pointed out.
abutting. lThe blocks 52 on each shaft are ar
ranged substantially perpendicularly to the shaft
ermost portion of the conveyor. h This action is re
60 on which they are mounted, each block being peated and each article is carried along a sub 60
` stantially continuous path up along the side of the
preferably arranged at .approximately a 90° angle
to the adjacent blocks. This arrangement of
blocks provides a roll having spaced projections
-formed by the ends of the blocks. 'I'he rolls 50
are suitable mounted so that the _high portions
of each roll, formed by the ends of the blocks, are
positioned opposite the low portions of the adja
cent rolls- thereby permitting the blocks of each
roll to clear the blocks of the adjacent rolls when
" the rolls are rotated.
conveyor-and backwardly vover the ascending arti
cles a large number of times.
When each block engages one of the articles tu
drive it upwardly, the inclined face 51 or 58 (as 65
the cas‘e may be) imparts an impulse to the article
in a direction longitudinally of the conveyor (to
the left as viewed in Fig. 1) to advance the arti
cle along the conveyor. Thus the articles are
both tumbled about and advanced along the con 70
veyor by the action o'f the rolls.
Each shaft tlv ismounted in ‘a suitable bearing _ As the articles advance along the conveyorithey A
6I)ì in one end of the housing and a second bearingA are struck by particles of abrasive traveling at
6I at the other end of the housing. Either or highl speed which cleans, polishes, hardens or
- both of thebearings 6I may be roller-bearings. otherwise treats the surfaces of articles accord 75
ance with the nature of the particles used. Since
the abrasive streams a, b 'and c have components
extending throughout varying angles, and since
the particles are tumbled about in the trough, the
articles are struck by abrasive from various angles
and thus all portions of the surfaces, including
cavities and projections, are fully treated. When
the articles reach the discharge end of the cori
veyors they are forced into the discharge vesti
in a manner generally similar to the drum shown
in Fig. 5 and described above:
'I'he conveyor |49 may comprise a plurality of
rolls |50 of generally cylindrical form, the ends
4of the rolls |50 terminating in shaft portions |53
mounted for rotation in suitable bearings |52
suitablysupported atthe ends of the housing |40.
Each roll |50 may be provided with spaced and
generally spiral-grooves I 5I extending partially
bule I0 and slide along the iioor II and are dis- ' around the roll.
charged from the apparatus. If desired, suitable
automatic apparatus may be provided for con
veying the articles away from the treating appa
15 «Referring now to Figs. 5 and 6 there is shown
apparatus provided with modified charging and
discharging mechanisms for supplying the arti
cles to the conveyor and removing them there
from in an effective manner. The apparatus may
20 be provided with 'one or more abrasive projector
wheels and a conveyor_||3 generally similar in
construction to those above described. The for
ward end of the conveyor is open and the adjacent
wall of the housing 99 is formed with an opening
25 |00 through which projects the charging drum
|0I. The charging drum |0| is rotatably mount
ed on a plurality of rolls |05 freely rotatable
on pins |06 carried by spaced arms |01 of a sup
porting frame |08.- The rolls |05 may be formed
with peripheralgrooves |04 adapted to receive
circumferential flanges |03 formed on the out
side of the drum |0| and spaced suf?ciently to
support the drum |0| in stable position on the
rolls |05.
tation of the shaft |09 the drum .I 0| is correspond
ingly rotated.
Each roll |50 may be driven from one or both
ends thereof by a sprocket |54 fixed to the shaft ' 16
portion |53 of each roll. The sprockets |54 are
driven synchronously from a suitable shaft |60
mounted in one or more bearings |6I. 'I'he
shaft i60 carries a sprocket |62 and a chain |63
is trained over the sprocket |62 and all of the 20
sprockets |54. Upon rotation of the shaft |60
the sprockets |54 are driven and the rolls |50
'driven in synchronism.
The articles to be treated are deposited on the
conveyor |49 by the drum |55 or in any other 25
suitable manner. The side Walls of the grooves
| 5| provide moving, inclined abutments which
engage the articles and advance them upwardly
along the side Walls of the conveyor in a manner
analogous to that described in connection with 30
the apparatus shown in Fig. 1. 'I'he grooves
being inclined, also exertîa force on the articles
longitudinally of the conveyor tending to lad
The drum |0I may be provided on its inner sur
ously with the tumbling action. Abrasive is pro 35
jected against the articles in a manner similar to
that above described and the articles may be
discharged from the other end of the conveyor in
any suitable manner.
'I'he present invention provides apparatus 40
whereby articles may be eñectively and continu
ously treated by a stream of granular treating
material for the purpose of .modifying the sur
face characteristics of. the articles in various
The articles may be supplied continu
face with inwardly projecting, inclined lugs |02 ously to the apparatus, and the latter need notA 45
disposed in staggered or echelon arrangement.v be shut down except for repair or adjustment.
Upon rotation of the drum, articles which are de
posited therein are given a forward movement by
50 the inclined lugs |02 and advanced along the drum
I 0| and finally are deposited on the conveyor H3.
If desired, a drum |20, similar to the drum |0|
may be provided for discharging the articles from
the conveyor H3. 'The drum |20 may be con
structed, mounted and driven in a manner similar
to the drum |0| except that the lugs |02, thereon
are arranged to carry the articles out of the ap
paratus. The drum |20 preferably is mounted so
that the lowermost portion of the ñoor of the
of adjacent rolls.
vance the articles along the conveyor simultane
The drum |0| may extend into the housing 99
and overlie the forward end of the conveyor H3,
whereby articles may be advanced by the drum I0|
and deposited on the conveyor I I3. The conveyor
H3 may `be driven from a shaft |09 carrying a
40 sprocket I I0 and a chain III may be trained over
the sprocket I l0 and over a circumferential ring
-‘sprocket H2 secured to thel drum IOI. Upon ro
The rolls |50 are mounted so 10
that the grooves |5| of adjacent rolls |50 are ofi
set or ‘in'echelon arrangement~ with the grooves
drum is level with thelowermost portion ofthe
floor of the trough provided by the conveyor H3.
Since the articles are tumbled about in the
stream, all of the articles and all portions of the ì
surfaces of each article are fully‘ and completely 50
treated. The articles are positively tumbled and
positively advanced and the period of treatment
may be closely controlled.
The apparatus provided by the present inven
tion is relatively simple and rugged and is posi 55
tive in operation. 'I'he rolls and other portions
of the apparatus which are subject yto severe
wear'from the treating material can be quickly
and easily removed for the purpose of repairing
or replacing these parts. The apparatus „is rela 60
tively automatic inl operation and can be oper
Thus as the articles reach the end of .the con
ated with the minimum of attention on the part
veyor H3 they are depositedin the drum |20 and of the operator. The apparatus may be em
are carried away from the end of the conveyor ployed with suitable automatic apparatus for
I I3. The drum |20 may be arranged to discharge ' conveying the articles to be treated to the treat
the articles into a suitable receptacle‘or o'n the ing apparatus and removing them therefrom so
floor adjacent to the apparatus or onto asuitable that the treating apparatus may be installed as
a component part of. relatively continuous pro;
4Referring now to iFigs. 7 and 8, there is shown duction line.
.70 a'modifled form of apparatus having a conveyor
While certain novel features of the invention
of somewhat modiñ'ed cconstruction adapted to have been disclosed and are pointed out in the 70
han’dle eiiiciently relatively small articles. 'I'he annexed claims, it willrbe understood that vari
ap aratus may be generally similar to that de
ous omissions, substitutions and changes may
sc bed in Fig. 1 and, if desired, may be provided be made by those Askilled in the art without de
with a drum |55 constructed, mounted and driven : parting from the spirit of the invention.
5 .
2,131,768 Y
What I claim is:
7. Apparatus for treating metal articles in
1. .Apparatus` for treating metal articles in
cluding, means for projecting a stream of abra
sive material, a concave supporting surface de
5 fined by a series of longitudinally extending
cluding, an abrasive-throwing wheel for pro
jecting a fan-shaped stream of abrasive particles,
a conveyorl for tumbling articles in and through
said'stream of abrasive particles, said conveyor
having a generally arcuate supporting surface
members, and means for imparting movement
greater than 90° but less than 360° in extent "
to said members for effecting a tumbling move
ment of the articles _treated across said members, defining therebetween- a longitudinal opening
and projections on‘said members for advancing , through which the abrasive stream is projected
said articles along said surface and through said.
' 2. Apparatus for treating metal articles includ
against the articles supported upon said arcuate
surface, a drum disposed adjacent and extend
ing to said conveyor, a plurality of inclined abut-y
ing, means for projecting a streamv of abrasive' ments on said drum, and means for rotating said
particles, three -or more individually movable
15 supporting elements, means mounting said ele
ments out of line to define a concave supporting
pocket for the articles to be treated, and means
for rotating said elements individually whereby
to tumble said articles in said pocket and advance
20 them through said stream.
3. Apparatus for treating metal articles in
cluding, means for projecting a stream of Vabra
sive particles, a series of individually movable
` elements, means mounting said elements' in a
series to form a supporting surface for supporting
articles to be treated, spaced projections on said
elements,. and means for rotating said elements
' whereby said spaced projections impart a tum
bling movement to articles and advance them
through said stream.
4. Apparatus for treating metal articles in
cluding, means for projecting a stream of abra
sive particles, a series of individually movable
rolls each including a' shaft having a plurality of
.35 non-circular blocks mounted thereon, means
- y mounting said rolls in proximity to ea'ch other .
whereby saidblocks form a supporting surface
for`the articles to be treated, and means for
rotating said rolls individually whereby said
blocks engage said articles and'impart impulses
thereto whereby to tumble said articles about in
said stream.
,5, Apparatus for treating metal articles in
'_ cluding, means for projecting a stream of abra
sive particles, a vseries of individually movable
rolls each having a plurality of spaced projec
tions thereon forming abutments, means mount
` ing said rolls in out ‘of line relationship so that
` the peripheries thereof form a concave sup
porting pocket for the articles to be treated, and
means for rotating said rolls whereby said abut
ments engage articles to be treated and tumble
the same over the rolls and advance the same
lalong said rolls and through said. stream.
v6. Apparatus
for . treating
means for projecting a stream of abrasive par
ticles including, a series of rolls each having a
plurality oi' abutments thereon, means mounting
` said rolls to form -a substantially continuous
supporting surface, andv means for rotating said
rolls whereby said abutments> effect a tumbling
movement of said articles on said supporting sur
faceand in said stream. ‘
drum, whereby said abutments engage the ar
ticles to be treated and advance them along said 15
drum to said conveyor-for treatment, said wheel
being so arranged that the particles constituting
said fan-shaped stream will strike the^article
at different angles- during the tumbling move
ment thereof.
8. Apparatus for treating metal articles, in
cluding, means for projecting a fan-shaped
stream of. abrasive particles, a conveyor for
tumbling articles through said stream of treat
ing material, said projecting means being so 25
arranged that the particles constitutingA said
abrasive stream impinge the article at different
angles during the tumbling movement thereof
said conveyor having a generally arcuate sup
porting surface greater than 90° but less than 30
360° in‘extent- defining therebetween a longitu
dinal opening through which the abrasive stream
is projected .against the articles supported upon
said arcuate surface, a drum disposed adjacent
and extending from said conveyor in position to 35
receive articles from said conveyor, a plurality of
inclined abutments on said drum, and means for
rotating said drum whereby said projections ad
vance the articles to be treated along said drum
and away from said conveyor.
9. Apparatus for abrasively treating metal
articles including, a conveyor presenting a
trough-like supporting surface, means for im
parting a combined lateral shifting, raising and
downward tumbling movement and a forward 45
advancing movement of the metal articles on
said surface, an abrasive throwing wheel mount
edïin position to throw a fan shaped stream of
treating particles> against the articles ön s'aid.
surface, means for rotating said wheel, a second 50
wheel disposed in position to throw a second fan
shaped stream of treating particles against said
articles, and means for rotating said second
wheel oppositely to said ñrst wheel whereby to
project a second stream oppositely‘to said first 55
stream, said wheels being arranged to project
their vrespective abrasive streams against the
articles during tumbling and advancing move
ment thereof with 'the particles of each stream
striking the articles at diiïerent angles during 60
the advancing vmovement thereof.
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