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Патент USA US3050773

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Aug. 28, 1962
Filed March 1’7, 1959
FIG. 8%
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FIG. 9a.
FIG. QC. 3
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Aug. 28, 1962
Filed March l?, 1959
FIG. 3.
FIG. 4.
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United States Patent ñhce
Emil Schmieder and Werner Haiss, Haslach (Kinzigtal),
Germany, assignors to FA. Ernst Haîss Eisen- und
Metall-KG., Haslach (Kinzigtal), Baden, Germany, a
corporation of Germany
Filed Mar. 17, 1959, Ser. No. 800,005
9 Claims. (Cl. 15-209)
Patented Aug. 28, 1962
preciably increased by an arrangement according to which
the steel wool iibers, which are anchored to that carrier by
means of a glue layer, do not project in some way un
covered and emerge from the surface of the practically
plane layer of the glue without any change in the border
line of the surface. if -this would be the case, particularly
in a comparatively hard layer of glue, the danger would
be brought about that the steel wool iibers, which are
subjected to a bending moment, crack or break at the point
The present invention relates to a grinding and polish l0 at which they emerge from the glue layer.
ing mat, which comprises a suitable carrier, as for instance
It is, therefore, still a further object of the present in
paper, a layer of artiiicial material, or a textile material,
vention, to provide a grinding and polishing mat wherein
to which a layer of steel wool, preferably in the form of
the steel wool ñbers, which are embedded in the glue layer
a woven work, is glued.
with their lower portion, have still a downwardly tapered
Such grinding and polishing mats may lbe used in the
sleeve of the glue material on the vborderline between the
ñrst place in all such instances where grinding mats or
glue layer and the air for a certain length. This sleeve
polishing ribbons are used which are made of emery
like covering may be also formed by a second new mater
cloth, emery paper or glass paper.
ial layer which is applied after drying of the iirst layer,
Compared with the mentioned conventional grinding
which second layer may have yielding or elastic char
mats and polishing ribbons, the grinding and polishing 20 acteristics.
mat, designed in accordance with the present invention,
In order to provide such sleeve-like or layer covering
brings about the advantage that the spaces between the
of the steel wool fibers, it is, for instance, possible to apply
iine cutting organs contained in the steel wool are not
to the flat carrier at iirst one glue layer, into which the
filled up with grinding dust and with the removed grinding
steel wool is pressed after the steel wool has been treated
means and in addition, that the layer of steel wool has a 25 with a solvent or thinning medium of the glue material.
certain inner yielding power and elasticity.
With these and other objects in view, which will become
By using grinding and polishing mats in accordance with
the present invention, which are applied, for instance, in
form of endless ribbons in conventional ribbon grinding
machines, appreciable centrifugal forces are experienced
at the points of turning direction of said bands, which
may lead, among other results, to an undesirable loosen
ing or even removal of the outer steel wool layers, which
are only more or less entangled with the lower steel wool
apparent in the following detailed description, the present
invention will be clearly understood in connection with
the accompanying drawings, in which:
FIGURE l is a schematic showing of a steel wool
FIG. 2 is a cross-section of the grinding and polishing
mat showing schematically the steel wool iibers at an
enlarged scale;
It is, therefore, one object of the present invention to
provide a grinding and polishing mat, which applies the
bodiment of applying the plaits to the carrier;
FIG. 3 is a top plan view of a band showing one ern
FIGS. 4 to 7 show similar additional embodiments of
steel wool in form of woven or braided Works, whereby
applying the plaits to the carrier; and
always two adjacent steel wool strands cross each other
FIGS. 8a, 8b, 8c, 9a, 9b, 9c, 10a, 10b and 10c show
with the result that the outer layers of the crossed strand 40 three diiierent embodiments of the edge formation of
are retained by the inner -layers of the crossing strand
the band, as well as three diiierent embodiments of the
which are directly adjacent thereto, which strands are,
thereby, subjected substantially only to a pull in its
Referring now to the drawings, and in particular to
longitudinal direction.
FIG. 2, the carrier 1 has applied thereto a layer of any
lt is another object of the present invention, to provide 45 suitable glue material 2, which layer of glue material
a grinding and polishing mat, wherein the active layer of
has at least partly embedded therein individual steel wool
the grinding and polishing mat formed of steel wool is
chips 3. Sleeve-like projections have been formed on
applied in form of a woven or plait work, which extends
said steel wool chips due to the eiiect of the surface ten
over the entire Width of the grinding and polishing band
sion on the outer substantially plane surface of the still
and is plaited of a plurality of steel wool strands.
liquid glue layer 2. These sleeve-like projections are
It is still another object of the present invention, to
tapered down in outward direction so that upon subjecting
provide a grinding and polishing mat wherein the active
the steel wool chips to a bending moment, no sharp break
layer is applied in the form of groups of three strands
can occur, which would happen if said sleeve-like pro
which are joined into narrow plaits, and which are glued
jections would not be present.
in side-by-side arrangement in Such a manner that the
In order to prevent the occurrence of so-called “shade
carrier is completely covered thereby. `Particularly in
lines” on the goods to be polished, particularly with end
the latter case, the design of the individual three strand
less grinding and polishing bands, which are equipped, in
steel wool plaits glued to the carrier is preferably arranged
accordance with the present invention, with a steel wool
similar to the point of an arrow in the direction of the run
plait glued thereon, which “shade lines” do occur if the
of the polishing band, as may be ascertained from FIG. 1 60 borders between two steel wool plaits are disposed on the
of the drawings, looking towards the working side by
carrier exactly parallel to the direction of movement of
a viewer. This arrangement brings about the result that
the band, the carrier formed as an endless band has
the steel wool übers, which are pressed onto the work
glued thereto a steel wool plait which is of corresponding
piece face to be worked, cut from the plait center pulling
length and is disposed thread-like with a slight angular
in outward direction, so that the steel wool strands which 65 deviation from the direction of movement of the band,
form the plait do not tear in outward direction with the
the beginning and the end of the lsteel wool plait being
result of a loosening of the plait works; rather the plait
disposed below the plait portion which forms the directly
works structure is pushed together towards the center line
adjacent thread turn.
of the plait.
For the same purpose, it is possible to dispose the steel
It is yet another object of the present invention, to 70 wool plaits, which are glued to the endless carrier, in
provide a grinding and polishing mat wherein the rigidity
any other manner more or less inclined towards the direc
and liie of the steel wool layer glued to a carrier is ap
tion of the run of the grinding and polishing band and
belts are formed as grids and comprise, for instance, a
plurality of crossed wires or a knitted wire arrangement
from stretching metal or the like.
While we have disclosed several embodiments of the
present invention, it is to be understood that these em
bodiments are given by example only and not in a limit
for this `purpose the steel wool plaits may be disposed,
for instance, in form of serpentine lines or wave lines,
whereby the amplitude of the wave line is at least equal
to one half of the width of the plait.
For the protection of endless grinding and polishing
bands against possibly occurring'edge tears or the like,
caused by the strong mechanical wear in band polishing
machines, the carrier band may be equipped, in accordance
with the present invention, at bath edges with edge pro
tecting means surrounding the steel wool layer. The
partial section of the edge of such band is shown in
FIGS. 8a, 8b and 8c as being constituted by a cord glued
along the carrier edge. FIGS. 9a, 9b and 9c show an
L-shaped protecting band and FIGS. 10a, 10b and 10c
ing sense, the scope of the present invention being de
termined by the claims.
We claim:
1. A grinding and polishing mat, particularly for band
polishing machines, comprising a carrier and a lcoexten
sive layer of steel wool secured to one side of said car
rier and having a front side and a back side, said layer of
> steel wool comprising >a plurality of at least individual
a flange formation of the carrier band, whereby the 15 plaits disposed in side-by-side relationship, and a layer
of adhesives securing said backside of the steel wool lay
ñanged edge is glued together to the carrier from which
er to said carrier.
it has been bent over.
2. The grinding and polishing mat, as set forth in claim
The grinding and polishing mat, designed in accordance
1, wherein saidplaits are multistranded.
with the present invention, permits of, in contradiction to
known conventional non-expandable emery bands, also 20I 3. The grinding and polishing mat, as set forth in clain’rfv
the polishing of .uneven faces, and for this purpose the
carrier lband is formed of an elastic yielding material,
which is made possible due to the use of a corresponding
elastic glue medium and upon consideration of the use
of steel wool plaits which are expandable within certain 25
Theexpandability of the carrier may be obtained, for
1, wherein said carrier is formed as a carrier band and 'y
said plaits are disposed obliquelyfrelative to they longiá
tudinal axis of said carrier bandand extending over the Y
entire width of said 'carrier band. ‘
4. The grinding and polishing mat, as set tprth inv
claim 3, wherein said carrier band has edge protecting
5. The grinding and polishing mat, as set forth in claim
instance, in such a manner that it is formed of a knitted
1, wherein said plaits ofsaid layer 'of steel Wool «have
fabric, as shown in FIGS. 8a, 9a and 10a, or of a rubber
band, as shown in FIGS. 8b, 9b and 10b, or of a corres 30 three-strands, and said strandsV are ydisposed adjacent each
sponding elastic -sheet of artificial material as shown in
6. The grinding and polishing mat, as set forth in
FIGS. 8c, 9c and 10c. Since generally an expandability
claim 5, wherein said layer of adhesive has a yielding
of the endless grinding and polishing band is crosswise
characteristic after assuming the dry state thereof, and
direction is found suñìcient for Vthe intended purpose and
an expandability of the endless polishing band in its 35 wherein portions of the free surface of said adhesive
longitudinal direction could possibly interfere with the
layer project from and surround said strands of said layer
of steel wool, in order to prevent breaking of steel wool
proper working on a -band polishing machine, the carrier
fibers under bending stresses.
band which is basically expandable, is equipped with non
7. The grinding and polishing mat, as set forth- in
elastic cords or the like in parallel arrangement to the
direction of its run, whereby only a crosswise expansion 40 claim 1, wherein said plaits of' said steel wool layer are
disposed along a serpentine line, the amplitude of said
between the bands, cords or the like, is made possible.
serpentine line being at least equal to one half of the width
Since in the endless grinding and polishing bands, in
of said plaits.
yaccordance with `the present invention, in contradiction
8. The grinding and polishing mat, as set forth in
to the known emery bands and glass paper bands, the
claim 1, wherein said 'carrier is formed as a carrier band,
steel Wool chips which function as removing means are
the latter yielding in cross~wise direction only and having
not rigidly connected with the carrier, rather only the
longitudinal, non-elastic threads.
lower layers of the steel wool chips are rigidly connected
9. The grinding and polishing mat, at set forth in
with the carrier, the danger is created that in case of a
claim 1, wherein said, layer of adhesives has a lower re
great running speed of the grinding or polishing band
the steel wool layer is loosened due to the great centrifugal 50 gion and an upper region, the latter being softer than said
lower region, the' lower portion of said plaits being em
forces experienced at the point of the turning rollers, or
bodied in said upper region of said layer of adhesives.
are even removed completely from the carrier. -In order
to meet this danger, the band polishing machines using
References Cited in the ñle of this patent
the grinding and polishing bands, in accordance with the
present invention, are equipped on the turning rollers 55
with pressure- or enclosing belts or the like, which engage
from outside the steel'wool layer, whereby a release or
removal of the steel wool layer from the carrier band is
, The enclosing belts may extend over the entire width 60
of the grinding or polished band. They may comprise,
however, also a plurality of correspondingly narrow
individual belts.
In order to exploit the centrifugal forces experienced
at the point of the turning rollers carrying the band for
the removal of the polishing dust accumulated between
theindividual steel wool fibers, the engaging or enclosing
Robbins __ __________ __ Oct. 12, 1926
Casper _____________ __ Sept. 27, 1932
Martin ______________ __ June 6,
Tully ________________ __ Jan. l2,
Ralferty _____________ __ Feb. 21,
Ashley _______________ __ Aug. 5,
Salick ____ ___________ __ Sept. 30, 1958
France ________ __ ____ __ Jan. 21, 1933V
France _____________ _.. May 23, 1936
France _______________ __ Sept. 30, 1953
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