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Патент USA US3092942

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June 11, 1963
J. E. MARSH
3,092,936
MACHINE FOR SANDING EDGE SURFACES OF LUMBER
Filed Sept. 28, 1960
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INVENTOR
J.EVERETT MARSH
ATTORNEYS
June 11, 1963
J. E. MARSH
3,092,936
MACHINE FOR SANDING EDGE SURFACES OF LUMBER
Filed Sept. 28, 1960
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INVENTOR
J. EVER ETT MARSH
June 11, 1963
J. E. MARSH
3,092,935
MACHINE FOR SANDING EDGE SURFACES OF LUMBER
Filed Sept. 28, 1960
4 Sheets-Sheet 5
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INVENTOR
J. EVERETT MARSH
BYWd
ATTORNEYS
June 11, 1963
J. E. MARSH
3,092,936
MACHINE FOR SANDING EDGE SURFACES OF LUMBER
Filed Sept. 28, 1960
4 Sheets-Sheet 4
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INVENTOR
J. EVERETT MARSH
BY
a M
ATTORNEY!)~
ire
3,92,936
tare
Patented June 11, 19%3
1
3,092,936
MAC if! ~ a FOR SANDING EDGE SURFACES
GF LUMBER
Julius Everett Marsh, Box 870, High Point, N.C.
Filed Sept. 28, 1966, Ser. No. 59,ll20
11 Claims. (Ci. 51-138)
This invention relates to a machine for sanding edge
surfaces of lumber, and particularly wooden boards used
in furniture manufacture.
It is an object of this invention to provide a. sending
machine including a belt on which the material to be
sanded is placed, and a sand belt movable at an angle
2
FIGURE 9 is a section view taken along the line 9—9
of FIGURE 8, looking in the direction of the arrows,
showing to advantage the initial point of contact of the
material with the sand belt and sanding head;
FIGURE 10 is ‘a similar view taken along the line
10—10 of FIGURE 8, looking in the direction of the
arrows, showing the progressive sanding of the edge of
the material;
FIGURE 11 is similar to FIGURE 10 and is taken
along the line Ill-11 of FIGURE 8, looking in the di
rection of the arrows and illustrates a further sanding
progression;
FIGURE 12 is ‘a view similar to FIGURE 11 taken
to the feed belt, to eifect sanding engagement with the
along the line 12—12 of FIGURE 8, looking in the di
material across the entire width of the sand belt.
15 rection of the arrows, illustrating still further progressive
Another object of the invention is to provide a sending
sanding of the material edge;
machine of the character described including a contour
mold or sanding head which the back face of the sand
FIGURE 13 is a view similar to FIGURE 12, taken
along the line l3—~13 of FIGURE 8, looking in the di
belt engages and follows, the mold being of elongated
rection of the arrows, illustrating the ?nal step in sand
non-lineal shape for continuous point contact along the 20 ing the edge of the work;
edge surface being sanded from ‘one side of the face to
the other, and geometrically designed to urge the sand
belt to run flush with the mold and to fade away from
FIGURE 14 is an enlarged side elevational view of
the pressure ‘assembly of the present invention;
FIGURE 15 is an end elevational view of the same;
contact with the material being sanded everywhere but
and
at the point of sanding.
25
FIGURE 16 is a fragmentary enlarged view of the
A further object is to provide a sanding machine in
compensating unit forming a part of the pressure as—
cluding an elongated flat sanding head which may be
sembly.
interchangeably employed with a plurality of heads of
Referring now in greater detail to the drawings, and
varying non-lineal shape.
more particularly to FIGURES l Eand 2 thereof, the sand
Other objects are to provide a contour mold of spiral 30 ing machine of the present invention includes a frame '
shape to eifect a predetermined contoured edge surface;
29 of rectangular shape supported at an angle to the
to provide a sanding machine in which the material is
horizontal by legs 21 which may be secured to a ?oor
sanded at an angle to the grain thereof, rather than with
by any suitable support 22. Leg braces are indicated at
the grain; and to provide a sanding machine including
23. A motor 24 is ?xed to frame 26‘ adjacent its upper I
a feed assembly having roller pressure members for 35 end, on the drive shaft of which is rotatably mounted
maintaining a constant force on the material being sanded
a drive pulley 25. A ‘sand belt 26 is adapted to engage
against the sand belt, the feed assembly further com
and be actuated by drive pulley 25', said sand belt ex
prising articulate means compensating for variations in
tending downwardly at an angle in substantially spaced
material thickness which additionally insure the appli
parallel relationship to frame 20. The lower limit of
cation of equal pressure to all parts of the material en 40 sand belt 26‘ engages a remote control idler 27 supported
gaged by the roller pressure members.
adjacent the lower end of frame 20. Remote control
Still other objects of the invention will be manifest
idler 27 may be of conventional construction, such as
from the following description of the present preferred
the illustrated Model No. X71 manufactured by Behr
from of the invention, taken in connection with the ac
Manning Company of Troy, New York, which includes
companying drawings, wherein:
45 a plate support 28 ?xed to the lower terminal of frame
FIGURE 1 is a side elevational view of a sanding
20, on which support is mounted a plate 29. An ad?
machine constructed in accordance with the present in
justment arm 30 extends upwardly ‘at an angle from
vention;
plate 29 and a pulley ‘support 31 extends at an angle
FIGURE 2 is a top plan view of the same;
between plate 29 and adjustment arm 30 and is adjust
FIGURE 3 is a sectional view taken along the line 50 able with respect to the latter. An idler pulley is in
3-3 of FIGURE 2, looking in the direction of the ar
dicated at 32 and is adjustable by means of adjustment
rows;
knobs 33 and helical springs 34. Adjacent remote con
FIGURE 4 is an enlarged fragmentary sectional view
trol idler 27 is a sand belt guide roller 35 rotatably mount
of the sand belt and feed belt forming a part of the
ed on a roller yoke 36, the roller yoke being attached
present invention, portions thereof being broken away 55 to frame 2%} by suitable means 37.
‘to disclose details of construction;
Intermediate drive pulley 25 and remote control idler
FIGURE 5 is an enlarged sectional view taken along
27, the back face of sand belt 26 is trained to engage
the line 5-5 of FIGURE 2, looking in the direction of
and assume the contour of a stationary sanding head
the arrows;
38, which sanding head is detachably connected to frame
FIGURE 6 is a schematic view illustrating the con 60 20 by suitable means 39. Sand belt 26 is maintained in
tour of the sanding head forming a part of the present
?ush engagement with sanding head 38 by placement of
invention;
the latter outside of the normal path of travel of the sand
FIGURE 7 is a sectional view of a piece of wood, one
belt between drive pulley 25 and remote control idler 27
side of which has been sanded by the sanding machine
(gsee FIGURE 2), The sand belt-engaging face of
of the present invention, the arrows indicating the points 65 sanding head 38 may assume a variety of shapes to effect
of sanding engagement of the present machine with the
edge-sanding of wood or other suitable material to any
wood;
desired contour. This shape may be any combination
FIGURE 8 is an enlarged fragmentary perspective view
of concave, convex and/or straight surfaces plotted on
of a sanding head and sand belt forming a part of the
the sanding head. It is therefore desirable to provide a
present invention, and showing to advantage, by means 70 variety of sanding heads in order to effect predetermined
of arrows, the path of the work to be sanded longitu
edge contours on wood or other suitable material.
dinally and transversely of the belt;
‘ One such sanding head is illustrated and, as shown
3,092,936
4
to advantage in FIGURES 6, 9, 10, 11, 12 and 13, the
sanding head for effecting the sanding contour illustrated
provided, at a point adjacent one end of frame 20, an
infeed guide plate 68 secured to and extending trans
in FIGURE 7 includes a spiral form preferably about
versely of the latter, said guide plate being provided with
twenty inches in length, the spiral form being a geometric
spaced adjusting gibs 69 adapted to receive an infeed
guide plate adjusting bar 70. Adjusting bar 70 is slotted
design accurately calculated to cause the sand belt to
run tightly against the form in its spiral shape, and then
to fade away from contact with the stock being sanded
everywhere except where the point contact is desired.
It will be noted that with this arrangement there is con
tinuous point contact between the surface being sanded
and the sand belt.
It is further noted from a consider~
longitudinally at 71, which slot is aligned with a com
plemental slot in guide plate 68. A bolt and nut unit 72
passing through slit 71 and the complemental slot in
~ guide plate 68, lock the two together in predetermined
relationship. The terminal of adjusting bar 70 adjacent
feed table assembly 40 is secured to a ?at infeed guide
73 which is positioned proximate belt 47 at one extremity
ation of FIGURE 8, that this point contact is effected
thereof, to insure proper alignment of the stock to be
by virtue of the angular relationship between the sand
sanded with sanding head 38 and sand belt 26. A sec
belt and the direction of feed of the stock. Thus, the
stock will follow the path shown by the arrows in 15 ond guide plate 74 is detachably connected by a bolt 75
to feed belt guide trough 46 proximate the other extrem
FIGURE 8, moving transversely of belt 26 as well as
ity of belt 47 to direct the stock subsequent to the
longitudinally thereof, to effect point contact with the
sanding operation.
spiral form at predetermined points of the latter.
In connection with feeding of stock on feed belt 47,
In FIGURE 6, a sanding head of spiral form is
schematically shown, this form being adapted to effect
there is provided a roller pressure assembly or hold-down
the edge contour illustrated in FIGURE 7. It will be
apparent from a consideration of this schematic showing
head 76 positioned superjacent frame 20 and feed table
assembly 40. Roller pressure assembly 76 includes a pair
of spaced vertical head beams 77, the lower terminals of
that as the stock to be sanded moves diagonally across
the sanding head, from the lower right hand corner to
the upper left- hand corner, point contact of the con
toured sand belt with the edge surface of the stock
which are secured to frame 26}.
Vertical beam clamps
25 78 are slidably engaged with vertical head beams 77.
Clamps 78 are maintained in predetermined position
along beams 77 by a retaining bar 79, the lateral termi
nals of which issue into yokes 80 which embrace beams
77 with the lower terminals of clamps 73 resting thereon.
‘there is provided a feed? table assembly 49 which is ad
jacent and ?xed to frame 26. This assembly comprises 30 Retaining bar 79 is provided with a centrally located in
ternally threaded sleeve 81 which is engaged by a
a rectangular support'41 which may be welded to frame
threaded shaft 82, the lower terminal of which is suitably
20 and additionally ?xed thereto by braces 42. Like pairs
journaled to frame 26. Vertical movement of retaining
of feed table adjustment bars 43 are pivotally connected
bar 79, with consequent movement of clamps 73 is ef
in spaced relation at one end to support 41 as indicated
fected by rotation of shaft S2 by means of an adjustment
at 44. Adjustment bars 43 extend upwardly into pivotal
wheel 83 on the upper terminal of threaded shaft 82.
engagement with belt guide supports 45. A feed belt
Horizontal beam clamps 84 are secured to vertical beam
guide trough 46 having lateral guide rails 46' is ad—
clamps 78 in any suitable manner, in which horizontal
justably mounted on bolts 45’ of guide supports 45,
from one side to the other is gradually effected.
For feeding stock into engagement with said belt 26,
within which trough an endless feed belt 47 runs. Bolts
' beam clamps are mounted horizontal head beams 85.
45’ may be operated to adjust the disposition of trough 40 Head beams 85 extend in spaced parallel relation to’ a
46 and feed belt 47 . Adjustable pulleys 48 and 49 are
point superjacent feed belt 47 at which point the termi
positioned at a point adjacent the longitudinal terminals
nais thereof are ?tted with horizontal head feed bar
of said belt guide trough, the pulleys being rotatably
clamps 36 adapted to receive horizontal head feed bar
mounted between brackets 50 and 51 which are suitably
Y 87. Sleeved ‘on head feed bar 87 adjacent clamps 86 are
secured to the underface of the belt guide trough.
45 roller unit clamps 8%.
Belt guide trough 46 is Vertically adjustable by means
As shown in FIGURES 5, 14 and ‘16, a bifurcated sup
of an elongated adjustment screw 52, one terminal of
port member 89 pends from one of said clamps 88, the
which is threaded at 53.‘ Screw 52 extends through a pair
of spaced transverse bars 54, the screw being ?xed to
lower terminals of which bifurcated member are per
forated to receive a shaft 96. A connecting member 91,
enlarged perforate section 54’ of bars 54. The lateral 50 joined at its lower terminal to the roller unit, is provided
terminals of each transverse bar are pivoted to each pair
with a milled out recess 92, in one side thereof, which
of feed table adjustment bars 43 at points intermediate
issues into a semi-circular surface 93v adapted for engage
their lengths, as shown at 55. At the threaded end of
ment with shaft 99 between portions of bifurcated mem
adjustment screw 52 there are provided a pair of spaced
ber 89. Adjacent semi-circular portion 93 at the inner
adjustment wheel supports 56 between which is a feed 55 most point of recess 92 there is provided a vertical shaft
table adjustment wheel 57 .threadedly engaged with por
engaging face 94 for purposes which will be more fully
tion 53. Upon actuation of adjustment wheel 57 ad
hereinafter set out. The other ‘of the roller unit clamps
justment screw 52 is moved longitudinally, thereby ef
83 is also provided with a depending bearing 95 through
fecting synchronous movement of adjustment bars 43 in
which a bolt 96 passes. (See FIGURES :14 and 15.) A
an arc, with resultant'vertical movement of feed belt 60 link 97 having perforate ears ‘)8 is pivotally supported
guide trough 46. Actuation‘ of feed belt 47 is effected by
by bolt 96 at its upper terminal. The central portion of
means of a sprocket chain 58 in operative engagement
link 97 is extended to provide a perforate extension 99
with a sprocket 59 connected to pulley 49. Sprocket
adapted for mating engagement with a second link 97',
chain 58 extends downwardly into engagement with
similar to link 97, like portions thereof being indicated
asprocket 60 driven by a suitable motor 61 supported 65 by like primed numbers. Pivotal connection of the two
by suitable members 62 and 63. An idler pulley 64 is
links is effected by bolt 96'. Extension 99’ of link 97’
supported intermediate the run of chain 58 by an arm 65,
a terminal of which, remote from idler pulley 64, is
pivoted at 66 to the housing of motor 61. A coil
is pivotally connected to a bolt 96' extending between a
pair of upstanding lugs 10% which are welded or secured
in any other suitable manner to the roller unit.
spring 67 is connected at one terminal to arm 65 adjacent 70
The roller unit includes an elongated inverted U
pulley 64 and at the other end to support member 62
shaped channel housing 1&1, to the transverse portion of
to take up the slack in chain 58 and maintain the latter
which upstanding lugs 19% and connecting member'91
taut at all times in the various positions of adjustment
of assembly 40.
are welded or otherwise suitably secured.
As shown to
advantage in FIGURES 1 and 5, idle rollers 102 and 108
Referring to FIGURE 2, it will be seen that there is 75 are rotatably mounted on axles 104 extending through
3,092,936
5
the depending vertical portions of inverted U-shaped
housing 101 near its lower terminal, so that rollers 102
are located voutside of housing 101 and rollers 103 are
located inside of housing .101. Rollers 102 and 103 are
preferably of the rubber-tire type and are adapted to exert
pressure on stock 105 being fed on belt 47, past sanding
head 38 and sand belt 26 in order to prevent accidental
displacement of the stock relative to the sand belt and
6
on the stock, the assembly will remain in predetermined
position. Pressure is equally applied to all portions of
stock under rollers 102 and 103 at all times, thereby
obviating any casual displacement of stock 105 on feed
belt 47.
The stock moves on feed belt 47 to bring the edge of
the stock into engagement with sanding belt 26 and, as
the stock advances on the feed belt, point contact of the
sanding head.
former at various points along the spiral form of the
An adjustment bar 106 extends from horizontal head 10 sanding head and sand belt is effected. By virtue of the
feed bar 87 to elongated inverted U-shaped housing 101.
angular relationship between feed belt 47 and sand belt
The terminals of bar 106 are threaded as indicated at
26, stock 105 moves transversely across the entire Width
107 and 108 respectively. A pair of nuts 109 are ‘engaged
of the belt. The progressive sanding steps are illustrated
with threaded section 107, one nut being positioned on
to advantage in FIGURES 8 through 13. In FIGURE 7
the inside of horizontal feed bar 87 and the other nut 15 there is shown the ?nished sanded edge of stock 105
being positioned on the outside thereof. A double nut
after the sanding steps illustrated in ‘FIGURES 9 through
110 is engaged with threaded section 108 underneath the
13. Arrows A, B, C, D, and E designate the points of
transverse section of U-shaped channel housing 101.
contact of the sand belt with the stock in the sanding
In use, with the sanding machine of the present inven
steps illustrated at FIGURES 9, 10,' ll, 12 and 13
tion, feed table assembly 40 is ?rst positioned by opera 20 respectively.
tion of feed table adjustment wheel 57 in order to locate
By virtue of the sleeved engagement of clamps 88 with
feed belt guide trough 46 and feed belt 47 at a predeter
head feed bar 87, channel housing ‘101 may be swung
mined point, depending upon the particular material to
out of ‘operative position, if desired.
be sanded. Adjustment wheel 83 of roller pressure as
With the sanding machine of the present invention,
sembly or hold-down head 76 is next operated to lower 25 means are provided for sanding stock edges with a sand
belt trained to assume a slowly changing contour, which
to feed belt 47. Optimum results are obtained when
belt is adapted to engage different parts of the stock be
rollers 102 and 103 into predetermined spaced relation
rollers ‘102 and 103 exert su?icient pressure on stock 105
ing sanded in progressive stages. It has been found that
against compressible belt 47 to cause the stock being
best results are obtained by use of a six inch belt, driven
sanded to make light contact with the upper terminals 30 at a 20° angle to the feed belt. Sanding is thereby ef
of rails 46'. This insures movement of the stock in the
exact horizontal plane desired for proper contact with
sanding head 38. Motor 24 is then actuated to operate
sand belt 26 in the direction indicated by the arrows in
FIGURES l and 2 and feed belt 47 is preferably, but not 35
necessarily actuated in the direction opposite to sand belt
fected across the entire width of the sand belt thereby
prolonging the life thereof inde?nitely. This angular re
lationship further sands the stock at an angle to the grain
thereof, rather than with the grain. A wider belt posi
tioned at a greater angle to the feed belt can be used
for producing different contours.
WhilevI have herein shown and described a preferred
26 by motor 61. The stock to be sanded, 105, is fed onto
belt 47 in any suitable manner and is properly positioned
embodiment of my invention, it is nevertheless to be un
with respect thereto by infeed guide 73‘. As stock 105
derstood that various changes may be made therein, with
continues along belt 47, it engages the rollers 102 and 40 out departing from the spirit and scope of the claims
103 mounted on inverted U-shaped housing 101. As
hereto appended.
What I claim is:
stock moves beneath initial rollers 102 and 103, these
rollers together with housing 101, and its supporting
l. A machine for sanding board lumber including a
structure, are raised and the weight of these parts rests
frame, a lumber feed assembly in the frame for moving
on the stock. The opposite end of the housing and its 45 a board, in a lineal path in the frame, and a sanding
connected parts remains suspended from clamp 88 con
assembly in the frame comprising a movable sand belt,
nected to head feed bar 87. In this position, the distance
the belt being disposed at an angle for contact of the belt
between the two points of suspension is increased, due
with a margin of one edge of the board, the sanding sur
to the fact that the series of rollers 102 and 103 are no
face of the angularly disposed belt being sinuous, for
longer parallel to the head feed bar 87 from which they
are suspended. The pivot points must therefore be per
mitted to draw closer together to compensate for that
shortening of distance. This is elfected by hinge action
constantly changing the locus of contact of the belt with
the board edge, to effect gradual sanding of said edge
from one side of the board to the other.
2. A sanding machine including a frame, a sand belt
of the articulate means comprising parts 95 to 100.
movably mounted on said frame, a feed belt for the ma
With the opposite end of the roller pressure assembly re 55 terial to be sanded proximate said sand belt, means for
maining in a ?xed vertical position, the pivot point of
?rmly retaining the material on the feed belt and posi
suspension created by the hinge action can move forward
tively preventing movement of the material relative there
to compensate for the shortening of the distance. As the
to, a contour mold mounted on said frame proximate the
stock is fed beneath the rollers, the aft end of the assem
rear face of said sand belt, the sand belt being forced
bly is elevated by a vertical movement of shaft 90 along
against the mold to assume the contour of the latter by
vertical face 94 of connecting member 91. Binding is
placement of the mold outside of the normal path of
prevented by a compensating vertical movement of shaft
travel of the sand belt, the contour mold thereby e?'ect
90 into engagement with vertical face 94 of connecting
ing point contact of the sand belt with the edge of the
material from one side to the other, for gradually sand
member 91. This arrangement permits vertical move
ment of inverted U-shaped channel housing 101 under 65 ing the latter, power means for operating said feed belt
and sand belt, said feed belt and sand belt being opera
variations in stock thickness, without any horizontal
ble in different planes at the point of contact with the
movement or binding of the parts thereof. Consequently
material being sanded, to effect sanding of the latter
there is no longitudinal movement of the housing rela
across the entire width of the sand belt.
tive to feed belt 47. Lateral movement of housing 101
70
3. A sanding machine, as set out in claim 2, wherein
toward or away from sand belt 26 is prevented by virtue
of the Wide bearing surfaces of the articulate means com
prising parts 89 to 91 and 95 to 100. These parts ?t
snugly and have wide surfaces so that when the roller
the contour mold is of elongated spiral shape.
4. In a sanding machine, a feed table assembly including
a frame, an endless feed belt movably mounted on said
frame, on which material is placed, and a roller pressure
pressure assembly is raised and the weight thereof rests 75 assembly positioned superjacent said endless feed belt and
3,092,936
O
7
0
casual displacement thereof with respect to the endless
belt, said roller pressure assembly including a stationary
support, a roller housing suspended from said stationary
support, roller members rotatably mounted on said roller
housing near its lower terminal and engageable with the
engageable with the material for preventing casual dis
placement thereof with respect to the feed belt, said roller
pressure, assembly including a stationary support, a roller
housing suspended from said stationary support, roller
members rotatably mounted on said roller housing near
its lower terminal and engageable with the material on the
belt to exert pressure thereon under the weight of said
board lumber on the endless belt to exert pressure thereon,
the roller pressure assembly further including articulate
means connecting said stationary support and roller hous
ing to permit relative movement of the latter to compen
assembly, and articulate means including links pivotally
connected to each other and to said stationary support and
roller housing to. permit ?oating movement of the latter
to compensate for variations in material thickness, and
to insure the application of equal pressure to all parts
of the material by the roller members.
5. A feed table assembly, as set out in claim 4, wherein
said articulate means additionally includes connecting
members ?xed to said stationary support and roller housing
in spaced relation to said links, and means joining said
connecting members to permit relative vertical movement
between the latter.
6. A feed table assembly as set out in claim 5, wherein
a shaft is horizontally supported by one of said connecting
members, said ‘other connecting member having a recess
adapted to receive said shaft, the recess being elongated to
provide a vertical wall which said shaft engages in response
to pivotal movement of said links to restrict movement of
said roller housing to a vertical plane.
7. A machine ‘for sanding board lumber including a
frame, a sand belt movably mounted on said frame, a lum
ber feed assembly on said frame proximate said sand
belt, said feed assembly comprising an endless belt on
which the board lumber is placed and fed into engage
ment with said sand belt, said endless belt being disposed
'
10 sate for variations in board lumber thickness.
8. A machine ‘for sanding board lumber as set out in
claim 7, wherein the contour mold is of spiral shape.
9. A machine for sanding board lumber including a
frame, a lumber feed assembly in the frame ‘for moving
15 a board in a lineal path, and a sanding. assembly in the
frame comprising a movable sand belt, said sanding assem
bly further including an elongated contour mold engage
able with the rear face of the sand belt, the belt-engaging
face of the mold being of spiral shape for effecting point
20 contact of the sanding belt with the board edge from one
side of the board to the other, for gradually sanding the
latter.
10. The machine of claim 9 with the addition of means
engageable with the board for preventing casual displace
25 ment thereof With respect to the feed belt.
11. The machine of claim 10 with the addition of means
for compensating for variations in material thickness and
insuring the application of equal pressure to all parts of
the material engaged by said ?rst means.
30.
at an angle to said sand belt and movable in a direction
opposite to that of the sand belt, an elongated contour
mold mounted on saidv vframe proximate the rear face of 35
said sand belt, said sand belt being forced against the mold
to assume the contour of the latter by placement of the
mold outside of the normal path of travel of the sand
belt, and a roller pressure assembly positioned superjacent 40
said endless belt and engageable with the board lumber
for urging the latter against the sand ‘belt and preventing
References Cited in the ?le of this patent
UNITED STATES PATENTS
645,717
2,261,614
2,456,217
2,762,173
2,904,937
2,907,151
'Fletcher ______________ __ Mar. 20, 1900
Buckley _______________ __ Nov. 4, 1941
Rothrock _____________ __ Dec. 14,1948
Bottcher ..__... _________ __ Sept. 11, 1956
Feurich _' _____________ __ Sept. 22, 1959
Peterson _______________ __ Oct. 6, 1959
2,922,264
Mushrush _____________ __ J an. 26‘, 1960 '
2,977,725
Simendinger ___________ __ Apr. 4, 1961
3,049,839
Smith _______ __ ______ __ Aug. 21, 1962
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