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Патент USA US2130753

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Sept. 20, 1938.
J, |-|_ BAKER
I
_
2,130,753
METHOD OF MAKING ABRASIVE BELTS
Filed Oct. 29, 1937
75
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arvucmio’b
JHMES Haw/mu BFIKER’
(1H0: “MA
Patented Sept. 20, 1938
2,130,753
UNITED STATES
PATENT OFFICE
2,130,753
METHOD OF MAKING ABRASIVE BELTS
James Howard Baker, Green Island, N. _Y., as
signor to Behr-Manzning Corporation, Troy,
N. Y., a corporation of Massachusetts
\ .
Application October 29, 1937, Serial No. 171,663
1 Claim. (Cl. 51-278)
The invention relates to abrasive belts and to
vide a take-up roll 2|, preferably made of wood
and similar to the roll l3, mounted on a shaft 22
a method of manufacture thereof.
One objectof the invention is to provide a which is journalled in journals in a journal sup
cheaper way of making abrasive belts. Another ' Port 23 affixed to the bench l0. Secured to the
5 object of the invention is to provide a method of shaft 22 is a large pulley24. The pulley 24 is 5
manufacture whereby several belts may be made
in one operation.
The invention accordingly consists in the fea
tures, of construction, combinations of elements,
10 arrangements of parts, and in the several steps
and relation and order ‘of each of said steps to
around the take-up roll 2|, and securing it in
place by means of a removable bar 30. When the
motor 28 is energized, as by means of a switch
many possible embodiments of the mechanical
3|, the take-up roll 2| will be revolved, thus
tending to ?ll up the take-up roller with coated
abrasive material |4a which is drawn from the
roll M of coated abrasive material which was ini
features of this invention, 1
tially provided.
15 the following claim.
_
In the accompanying drawing showing one of
.
Figure l is a vertical sectional view through
20 certain apparatus for manufacturing belts ac
cording to the present invention;
Figure 2 is a perspective view of another ap
paratus used in the production of belts accord
ing to the invention;
25
is likewise affixed to the bench In.
The operator pulls off some of the coated abra
sive material |4a from the roll |4, winding it 10
one or more of the others thereof, all as will be
illustratively described herein, and the scope
of the application of which will be indicated in
'
driven by a belt 25 passing around a small pulley
26 on the armature shaft 21 of a motor 28 which
Figure 3 is a plan view of the belts at one
stage in their manufacture;
,
Figure 4 is' a perspective view of a plurality of
belts just before separation, and
forked portion 40 in which is journalled a scor- _
Figure 5 is a view showing the ?nal articles.
30
Referring ?rst to Figure 1, upon any suitable
-\ support such as the top of a work benchylll, I
provide the apparatus shown in Figure l. I pro
vide a shaft || journalled in bearings in a pair
of supports l2 a?ixed to thebench II]. In the
35 case of the journal supports l2, as in the case of
other journal supports, only one thereof is shown
since Figure l is a sectional view.
Upon the shaft II, I mount a roll |3 holding
a supply of coated abrasive material M which is
40 wound upon the roll l3. The coated abrasive
material may be of any desired sort.
'
I further provide a standard 32 fastened to the
bench Ill and braced thereto by a brace 33. A
bell crank lever 34 is mounted upon a shaft 35
which is fastened to the standard 32 by means
of brackets 36. This bell crank lever 34 has a
forked portion 31 in the front thereof in which
is mounted a second bell crank lever 38 pivoted
on a pinv39 passing through the forked portion
31.. The second bell crank lever 38 has a front
For ex
ample, the abrasive may consist of aluminum
oxide, silicon carbide, garnet, ‘quartz, emery or
the like, and the backing may consist of paper or
45 cloth of any variety or combination of paper and
’ cloth. The bond may be and usually is glue but
other bonds such as waterproof bonds and resin
ous bonds may be provided.
I further provide a roller l5 mounted in jour-v
50 nals provided in supports l6 affixed to the bench
I0. I further provide a large diameter metal
'roll I‘! mounted in journals in journal supports
I8 af?xed to the bench I0. I further provide an
idler roll l9 mounted in journals in journal sup
55 ports 20 a?ixed to the bench HI. I further pro
ing disk 4| mounted on a pin 42.
For primary adjustment, I provide a screw 43
having a knurled portion 44 which is in threaded
engagement with the upper end of the bell crank
lever 34 and abuts the front surface of a cross
member 45 attached to the standard 32. For sec
ondary adjustment, I provide a screw 46 in 35
threaded engagement with the upper end of the
bell crank lever 40 and abutting a front surface
of the bell crank lever 34.
The scorer 4| consists of a steel disk with a V
shaped periphery 48.
40
The coated abrasive material I4 is wound
with the abrasive on the outside. The rollers l5
and I9 serve to keep it in peripheral engagement
with the roller I‘! which acts as an anvil.
As
the strip of coated abrasive |4a is drawn off the 45
roll l4, it passes under the cutting V edge 48 of
the scorer 4| and is scored.
When a consider
able portion has been wound upon the roll 2|,
too high speed of drawing the material W1 is
prevented by slippage of the belt 25. In other 50
words, the natural tendency of any direct wind- ‘
ing mechanism, being to speed up as the take-up ‘
roll is wound, is offset by the fact that a friction
drive is provided. I preferably provide bolts 50
to secure the motor 28 in place which‘ pass 55
2
2,130,753
through long slots 5| in the motor base whereby
to remove as much and no more than desired,
the tension on the belt 25 may be adjusted.
-By means of the apparatus shown, a roll of
coated abrasive material M may be scored. I ad
just the screws 43 and 46 so that the backing of
the wheel ‘Il may be raised or lowered by the
means for raising and lowering the _motor 62
described.
The material Mb is now in the form shown in 5
the coated abrasive material will not be entirely
broken or severed; there is just su?icient strength
left to hold the two portions together. Instead
of dividing the coated abrasive material into two
Figure 3 with a scored line 60 therein and a por
tion 15 from which the abrasive has been re
parts, as shown, I may provide additional scorers
M and associated mechanism and split the coat
ed abrasive material into three, four, ?ve or more
parts. I prefer, however, to score it in one or
two places so that it will split into two or three
15 parts.
I now out ‘the material Ma into suitable
lengths on the bias at any desired angle. I prefer
an angle of 45°, as indicated in Figure 3.
I now take a piece of material Mb which has
20 been scored as indicated by the line 60 and cut
to non-rectangular form with 45° and 135° cor
moved. The operator now with a brush places
glue upon the portion 15, then bends the material
Mb into the form of a belt with abrasive on the
outside. After the end of the belt is glued, it is
lapped to the other end and the'joint is pressed
by a suitable clamp or pressure device. The ma
terial is now in the form shown in Figure 4, in
which a pair of belts Mo and Md are held to 15
gether at the scoring line 60. These belts may
be readily broken apart into two separate belts
Mo and Md, as shown in Figure 5. The advan
tage of the vmethod of procedure is that for a
single abrasive removing operation and a single '20
gluing operation, two, three or four belts may
ners, as shown, and remove some of the abrasive
be made where one belt was made before.
at one end with the apparatus shown in Figure 2.
certain long belts, I prefer an angle of 45°, as
shown in Figure 3. For belts which are relatively
short in length as compared with their width, a 25
wider angle is preferably used, such as for ex
ample an inside angle of 70° at the acute corners.
It will thus be seen that there has been pro
vided by this invention a method and an article
in which the various objects hereinabove set 30
This comprises a flat surface 6| of a bench or
25 table, which may be a portion of the bench ID
if desired, and upon which is mounted a motor
62. ~ The motor 62 is secured to a bracket 63 which
has a clamp 64 to clamp it thereto. The bracket
63 has trunnions 65 trunnioning it to the table
30 6|, the trunnions 65 ?tting in journal brackets
66. I provide an elevating screw 61 with a hand
wheel 68 which is in threaded engagement with
the outer end of the bracket 63. I provide a hold
For
forth together with many thoroughly practical
advantages are successfully achieved. As various
possible embodiments might be made of the me
down screw 69 which is in threaded engagement
chanical features of the above. invention and as
with the table BI and passes through the bracket
the art herein described might be varied in var
63. By this means the motor can be raised and
ious parts, all without departing from the scope
of the invention, it is to be understood that all
matter hereinbefore set forth or shown in the
accompanying drawing is‘ to be interpreted as
illustrative and not in a limiting sense.
lowered.
'
The motor armature shaft 10 has secured
thereon agrinding wheel 1 I. This wheel is pref
40 erably of aluminum oxide bonded with ceramic
bond and of hard grade hardness, but other types
of grinding wheels may be used.
I provide a
straight edge ‘M against which the end of the
material Mb may rest.
The operator passes the scored material Mb
under the grinding wheel, as shown in Figure 2,
which rips off the abrasive material therefrom,
together with most of the glue or other adhesive,
leaving at that point just the backing. In order
I claim:--
,
Method of making several abrasive belts at one
time which comprises providing a roll of coated
abrasive material, drawing the abrasive material
under a scorer, cutting the abrasive material to
the desired length, joining the two ends together,
and separating the wide belt into multiple nar
rower belts by separating along the scored lines.
'
JAMES HOWARD BAKER.
35
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