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Патент USA US2113106

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April 5, 193s.
K. H. Bmw-:N-`
ABRADING APPARATUS
Filed Sept. 22, 1957
y
2,113,106
Patented Apr. 5, 1938
2,113,106
UNITED STATES
PATENTy OFFICE
2,113,106
ABRADING APPARATUS
Kenneth H. Bowen, Auburn,-N. Y., assignor to
Columbian Rope Company, Auburn, N. Y., a
corporation of New York
Application September 22, 1937, Serial No. 165,177
6 Claims.
This invention relates to improvements in
abrading apparatus and, particularly, to that type
l2, is removably attached. This detachability of
essentially of a ñbrous material and a binder
the disc l l is for the purpose of permitting ready
renewal of the abrasive, because, under normal
operating conditions, the abrasive material on
the disc is depleted, probably, within thirty (30) Ui
minutes. As is well understood, the pad, to
gether with the disc of abrasive material is ro
compressed in disc-like form to a density
and thickness which will permit the pad to flex
tated at 'a comparatively high speed and pressed
against the surfaces of the object being operated
laterally in order that it, together with the sheet
upon and, in order that the pad may accommo
date itself to the contour of that surface, it is
adapted to flex laterally while rotating. Due to
this ñexing of the pad, there is a relative move
ment between the pad and disc carrying the
abrasive and the frictional engagement between
these surfaces inevitably Wears away, to a notice
able extent, the pad, so that the thickness thereof
of apparatus wherein a sheet of abrasive mate
ril is mounted upon a rotatable support com
5 monly known as a pad.
These so-called pads are usually composed
of abrasive material carried thereby, may ac
commodate itself to the surface of the object being
operated upon. Due to this flexing of the pad
and, of course, the sheet of abrasive material,
” >there is a tendency toward frictional‘engagement
between the contacting surfaces of the pad and
said sheet of abrasive material, thus causing un
due wear on the pad, and the primary object
of the present invention is to provide means for
20 minimizing, or eliminating, this frictional en
gagement, thus increasing the life of the pad.
A further object of the invention is to provide
means for lubricating the contacting surfaces of
the sheet of abrasive material and pad which
will decrease the coeflicient of friction and hence
and, therefore, its rigidity, is gradually dimin
ished. In order to overcome this difliculty, the
present invention contemplates the use of a lubri 20
cating substance between these contacting sur
faces of the disc and pad but, in view of the fact
that the pad is composed essentially of ñbres, it
is necessary that a lubricant be used that will not
affect the binder or destroy its bonding proper
25
decrease the abrasive wear on the pad but which
ties.
will not detrimentally affect the binder and fibre
structure of the pad.
or paraflîn, may be used, or any of these waxes ,
A still further object of the invention is to
30 provide means for lubricating contacting sur
faces of the pad and sheet of abrasive material,
whereby the supply of lubricant to these surfaces
will be constantly replenished.
With these and other objects in view, the in
vention consists in certain details of construction
and combinations and arrangements of parts,
all as will hereinafter be more fully described,
and the novel features thereof particularly
pointed out in the appended claims.
In the accompanying drawing, illustrating a
40
preferred embodiment of the invention
Figure 1 is a perspective view of the pad, with
the sheet of abrasive material partly turned back;
Fig. 2 is a transverse sectional View of the pad
45 and sheet of abrasive material;
' Fig. 3 is a perspective view of the 'rear of the
sheet of abrasive material, with the lubricant
applied thereto; and
Fig. 4 is an enlarged detail sectional View of the
50 pad and sheet of abrasive material.
vAs previously indicated, the present type of
abrading apparatus comprises a pad I0, gener
ally of fibre construction and a binder, such as
latex cement, against one surface of which a
55 sheet or disc Il, carrying a granular substance
For this reason, a wax is preferred.
For
instance, candelilla wax, cannabis wax, beeswax,
may be used in combination with mica or
graphite. Any of these lubricants will material 30
ly reduce the coeflicient of friction without de
stroying or detrimentally affecting the binder
material.
In the preferred embodiment of the invention,
this lubricant, whatever its form, is preferably 35
carried by the disc Il, because it may not only be
impractical to impregnate the pad itself with the
wax, but even if the lubricant were applied direct
ly to the pad, it would, no doubt, be gradually
dissipated and, under some circumstances, might
prove detrimental to the fibre structure.
There
fore, more >protection is afforded by having the
lubricant carried by the disc Il. In addition, by
having the lubricant carried by the disc Il,
there will be a more or less automatic constant
replenishment of lubricant because, as previously
pointed out, these discs of abrasive material
have a life of approximately twenty (20) or thirty
(30) minutes under normal operating conditions,
so that by the more or less constant replacement 50
of paper discs there is, at the same time, a con
stant replenishment of lubricant. As will be ap
preciated, with this film of lubricant interposed
between the paper sheet and the contacting sur
¿face of the pad, the frictional contact between 55
2
2,113,106
the contacting surfaces of these two elements
will impose very little, if any, wear on the fibrous
structure of the pad, thus materially increasing
the life of the pad.
Latex cement has been indicated as the pre
ferred binder, but other materials can be used,
such as casein and hide glues and combinations
of these materials or with other binders. None
of them will be detrimentally affected by the
10 lubricants specified.
What I claim is:
1. In an abrading apparatus comprising a lat
erally ñexible pad and a disc of abrasive mate
rial detachably secured against a side surface of
15 said pad, a lubricating substance interposed be
tween the contacting surfaces of said pad and
disc to eliminate friction between said surfaces '
during ñexing of said pad and disc.
2. In an abrading apparatus comprising alat
20 erally flexible pad composed essentially of vege
table ñbres and a disc of abrasive material de
tachably secured against a side surface of said
pad, a ñlm of lubricant on the surface of said disc
in contact with said pad whereby frictional en
25 gagement of the contacting surfaces of the sheet
and pad under lateral flexing is minimized.
3. In an abrading apparatus comprising a lat
erally flexible pad composed essentially of vege
table ñbres and a binder, a disc of abrasive sub
30 stance removably secured against one of the side
surfaces of said pad, a body of lubricant on the
face of said disc contacting the pad surface to
minimize frictional engagement between the con
tacting surfaces of the pad and disc under lateral
flexing of said elements, said lubricant being non
destructive of the binder ingredient of the pad.
4. In an abrading apparatus comprising a lat
erally flexible pad composed essentially of vege
table fibres and a disc of abrasive substance re
movably secured against one of the side surfaces
of said pad, a body of lubricant on the face of
said disc contacting the pad surface to minimize
frictional engagement between the contacting
surfaces of the pad and disc under lateral flexing
of said elements, said lubricant being selected 15
from a group consisting of candelilla wax; can
nabis wax; mica; graphite; beeswax and paraffin.
5. A body of abrasive material comprising a
backing member with granular abrasive sub
stance on one surface thereof, and a film of 20
lubricant on the opposite surface of said backing
member.
6. A body of abrasive material comprising a
backing disc with a granular abrasive substance
on one »surface thereof, and a film of lubricant on 25
the opposite surface- thereof, said lubricant being
selected from a group consisting of candelilla
wax; cannabis Wax; mica; graphite; beeswax and
parafñn.
KENNETH H. BOWEN.
30
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