U.S. patent number RE35,021 [Application Number 07/962,311] was granted by the patent office on 1995-08-22 for compounding, glazing or polishing pad.
This patent grant is currently assigned to Minnesota Mining and Manufacturing Company. Invention is credited to Richard L. Englund, Thomas W. Schwartz.
United States Patent |
RE35,021 |
Englund , et al. |
August 22, 1995 |
Compounding, glazing or polishing pad
Abstract
A paint finishing pad adapted to be used on a drive assembly
including a back up pad and a drive motor for rotating the back up
pad. The paint finishing pad includes a layer of open cell
polymeric foam having a front surface defined by a plurality of
spaced projecting portions of the layer of foam, and loops
projecting from a rear surface of the layer of foam for releasably
attaching the paint finishing pad to a support surface on the back
up pad.
Inventors: |
Englund; Richard L. (Maplewood,
MN), Schwartz; Thomas W. (Troy Township, St. Croix County,
WI) |
Assignee: |
Minnesota Mining and Manufacturing
Company (St. Paul, MN)
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Family
ID: |
23150824 |
Appl.
No.: |
07/962,311 |
Filed: |
October 16, 1992 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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Reissue of: |
298508 |
Jan 18, 1989 |
04962562 |
Oct 16, 1990 |
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Current U.S.
Class: |
15/230.16;
15/230; 15/230.18; 15/97.1; 451/530; 451/533 |
Current CPC
Class: |
B24D
9/085 (20130101); B24D 11/001 (20130101); B24D
13/14 (20130101); B24D 13/147 (20130101) |
Current International
Class: |
B24D
9/00 (20060101); B24D 9/08 (20060101); B24D
11/00 (20060101); B24D 13/00 (20060101); B24D
13/14 (20060101); B24B 029/00 () |
Field of
Search: |
;15/230,230.1,230.14,230.16,230.17,230.18,244.4,97.1,98
;51/394,395,398,401 ;427/429 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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0095015 |
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Nov 1983 |
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EP |
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0196832 |
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Oct 1986 |
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EP |
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1254735 |
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Jan 1961 |
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FR |
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3043044 |
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Jun 1982 |
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DE |
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56-126581 |
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Oct 1981 |
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JP |
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58-4361 |
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Jan 1983 |
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JP |
|
990142 |
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Apr 1965 |
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GB |
|
Primary Examiner: Roberts; Edward L.
Attorney, Agent or Firm: Griswold; Gary L. Kirn; Walter N.
Huebsch; William L.
Claims
We claim:
1. A pad for applying glaze to finish paint and adapted to be used
on a drive assembly including a back up pad having a generally
planar support surface and a drive motor for moving the back up pad
in a plane parallel to said support surface during application of
the glaze, said paint finishing pad comprising:
a layer of resiliently compressible open cell polymeric foam having
a generally planar rear surface and an opposite front surface
defined by a plurality of spaced projecting portions of said layer
defining recess between said projecting portions, said polymeric
foam from which said layer is formed having a compression
deflection value of about 0.4 pounds per square inch when
compressed twenty five percent and of about 0.65 pounds per square
inch when compressed sixty five percent in accordance with the test
procedure in ASTM D3574; and
means attached to said rear surface for releasably attaching said
paint finishing pad to the support surface of the drive unit.
2. A paint finishing pad according to claim 1 wherein said
projecting portions of said layer of foam are disposed in a regular
rectangular array, said layer has ridge portions recessed a first
distance from the distal ends of said projecting portions, and said
layer has a rectangular array of sockets recessed a second distance
greater than said first distance from the distal ends of said
projecting portions, with each of said sockets being bounded by the
ridges between four adjacent projecting portions.
3. A paint finishing pad according to claim 2 wherein said second
distance is more than about 0.64 centimeter (0.25 inch).
4. A paint finishing pad according to claim 1 wherein said
projecting portions of said layer project more than about 0.64
centimeter (0.25 inch) beyond the recesses defined between said
projecting portions.
5. A paint finishing pad according to claim 1 wherein said means
attached to said rear surface for releasably attaching said paint
finishing pad to the support surface of the drive unit comprises an
attachment layer including a plurality of loops, and means for
attaching said attachment layer to said layer of foam providing
passageways between the attachment layer and the layer of foam that
afford passage of liquid therebetween to facilitate cleaning of the
paint finishing pad.
6. In combination,
a drive assembly including a back up pad having a generally planar
support surface and a drive motor for moving the back up pad in a
plane parallel to said support surface,
a pad for applying glaze to finish paint and comprising a layer of
open cell resiliently compressible polymeric foam having a
generally planar rear surface and an opposite front surface defined
by a plurality of spaced projecting portions of said layer defining
recess between said projecting portions, said polymeric foam from
which said layer is formed having a compression deflection value of
about 0.4 pounds per square inch when compressed twenty five
percent and of about 0.65 pounds per square inch when compressed
sixty five percent in accordance with the test procedure in ASTM
D3574; and
means for attaching the rear surface of said paint finishing pad to
the support surface of the back up pad.
7. A combination according to claim 6 wherein said projecting
portions of said layer are disposed in a regular rectangular array,
said layer has ridge portions recessed a first distance from the
distal ends of said projecting portions and extending between
adjacent projecting portions, and said layer has a rectangular
array of sockets recessed a second distance greater than said first
distance from the distal ends of said projecting portions, with
each of said sockets being bounded by the ridges between four
adjacent projecting portions.
8. A combination according to claim 7 wherein said second distance
is more than about 0.64 centimeter (0.25 inch).
9. A combination according to claim 6 wherein said projecting
portions of said layer project more than about 0.64 centimeter
(0.25 inch) beyond the recesses defined between said projecting
portions.
10. A combination according to claim 6 wherein said means for
attaching comprises a layer of material adhered to the rear surface
of said layer of foam and having a plurality of projecting loops,
and a layer along said support surface having a plurality of
projecting hooks releasably engaging the loops on said layer of
material.
11. A combination according to claim 6 wherein said means attached
to said rear surface for releasably attaching said paint finishing
pad to the support surface of the drive unit comprises an
attachment layer including a plurality of loops, means for
attaching said attachment layer to said layer of foam providing
passageways between the attachment layer and the layer of foam that
aford passage of liquid therebetween to facilitate cleaning of the
paint finishing pad, and a layer along said support surface having
a plurality of projecting hooks releasably engaging said loops.
12. In combination,
a rotary drive assembly including a back up pad having a generally
planar support surface and a drive motor for rotating the back up
pad about a central axis normal to said support surface,
a pad for applying glaze to finish paint and comprising a layer of
resiliently compressible open cell polymeric foam having a
generally planar rear surface and an opposite front surface defined
by a plurality of spaced projecting portions of said layer defining
recess between said projecting portions, said polymeric foam from
which said layer is formed having a compression deflection value of
about 0.4 pounds per square inch when compressed twenty five
percent and of about 0.65 pounds per square inch when compressed
sixty five percent in accordance with the test procedure in ASTM
D3574; and
means for attaching the rear surface of said paint finishing pad to
the support surface of the back up pad.
13. A combination according to claim 12 wherein said projecting
portions of said layer are disposed in a regular rectangular array,
said layer has ridge portions recessed a first distance from the
distal ends of said projecting portions and extending between
adjacent projecting portions, and said layer has a rectangular
array of sockets recessed a second distance greater than said first
distance from the distal ends of said projecting portions, with
each of said sockets being bounded by the ridges between four
adjacent projecting portions.
14. A combination according to claim 13 wherein said second
distance is more than about 0.64 centimeter (0.25 inch).
15. A combination according to claim 12 wherein said projecting
portions of said layer project more than about 0.64 centimeter
(0.25 inch) beyond the recesses defined between said projecting
portions.
16. A combination according to claim 12 wherein said means for
attaching comprises a layer of material adhered to the rear surface
of said layer of foam and having a plurality of projecting loops,
and a layer along said support surface having a plurality of
projecting hooks releasably engaging the loops on said layer of
material.
17. A combination according to claim 12 wherein said means attached
to said rear surface for releasably attaching said paint finishing
pad to be support surface of the drive unit comprises an attachment
layer including a plurality of loops, means for attaching said
attachment layer to said layer of foam providing passageways
between the attachment layer and the layer of foam that afford
passage of liquid therebetween to facilitate cleaning of the paint
finishing pad, and a layer along said support surface having a
plurality of projecting hooks releasably engaging said loops.
.Iadd.
18. A pad for applying glaze to finish paint and adapted to be used
on a drive assembly including a back up pad having a generally
planar support surface and a drive motor for moving the back up pad
in a plane parallel to said support surface during application of
the glaze, said paint finishing pad comprising:
a layer of resiliently compressible open cell polymeric foam having
a generally planar rear surface and an opposite front surface
defined by a plurality of spaced projecting portions of said layer
defining recess between said projecting portions, said polymeric
foam from which said layer is formed having a compression
deflection value generally in the range of about 0.29 to 0.49
pounds per square inch when compressed twenty five percent and
generally in the range of about 0.43 to 0.77 pounds per square inch
when compressed sixty five percent in accordance with the test
procedure in ASTM D3574; and
means attached to said rear surface for releasably attaching said
paint finishing pad to the support surface of the drive unit.
.Iaddend. .Iadd.19. A paint finishing pad according to claim 18
wherein said projecting portions of said layer of foam are disposed
in a regular rectangular array, said layer has ridge portions
recessed a first distance from the distal ends of said projecting
portions and extending between adjacent projecting portions, and
said layer has a rectangular array of sockets recessed a second
distance greater than said first distance from the distal ends of
said projecting portions, with each of said sockets being bounded
by the ridges between four adjacent projecting portions. .Iaddend.
.Iadd.20. A paint finishing pad according to claim 18 wherein said
projecting portions of said layer project more than about 0.64
centimeter (0.25 inch) beyond the recesses defined between said
projecting
portions..Iaddend. .Iadd.21. A paint finishing pad according to
claim 19 wherein said second distance is more than about 0.64
centimeter (0.25 inch )..Iaddend. .Iadd.22. A paint finishing pad
according to claim 18 wherein said means attached to said rear
surface for releasably attaching said paint finishing pad to the
support surface of the drive unit comprises an attachment layer
including a plurality of loops, and means for attaching said
attachment layer to said layer of foam providing passageways
between the attachment layer and the layer of foam that afford
passage of liquid therebetween to facilitate cleaning of the paint
finishing pad..Iaddend. .Iadd.23. In combination,
a rotary drive assembly including a back up pad having a generally
planar support surface and a drive motor for rotating the back up
pad about a central axis normal to said support surface,
a pad for applying glaze to finish paint and comprising a layer of
resiliently compressible open cell polymeric foam having a
generally planar rear surface and an opposite front surface defined
by a plurality of spaced projecting portions of said layer defining
recess between said projecting portions, said polymeric foam from
which said layer is formed having a compression deflection value
generally in the range of about 0.29 to 0.49 pounds per square inch
when compressed twenty five percent and generally in the range of
about 0.43 to 0.77 pounds per square inch when compressed sixty
five percent in accordance with the test procedure in ASTM D3574;
and
means for attaching the rear surface of said paint finishing pad to
the support surface of the back up pad..Iaddend. .Iadd.24. A
combination according to claim 23 wherein said projecting portions
of said layer are disposed in a regular rectangular array, said
layer has ridge portions recessed a first distance from the distal
ends of said projecting portions and extending between adjacent
projecting portions, and said layer has a rectangular array of
sockets recessed a second distance greater than said first distance
from the distal ends of said projecting portions, with each of said
sockets being bounded by the ridges between four adjacent
projecting portions..Iaddend. .Iadd.25. A combination according to
claim 23 wherein said projecting portions of said layer project
more than about 0.64 centimeter (0.25 inch) beyond the recesses
defined between said projecting portions..Iaddend. .Iadd.26. A
combination according to claim 24 wherein said second distance is
more than about 0.64 centimeter (0.25 inch)..Iaddend. .Iadd.27. A
combination according to claim 23 wherein said means for attaching
comprises a layer of material adhered to the rear surface of said
layer of foam and having a plurality of projecting loops, and a
layer along said support surface having a plurality of projecting
hooks releasably engaging the loops on said layer of
material..Iaddend. .Iadd.28. A combination according to claim 23
wherein said means attached to said rear surface for releasably
attaching said paint finishing pad to the support surface of the
drive unit comprises an attachment layer including a plurality of
loops, means for attaching said attachment layer to said layer of
foam providing passageways between the attachment layer and the
layer of foam that afford passage of liquid therebetween to
facilitate cleaning of the paint finishing pad, and a layer along
said support surface having a plurality of projecting hooks
releasably engaging said loops..Iaddend.
Description
TECHNICAL FIELD
The present invention relates to pads used to finish the exposed
surface of paint such as on automobiles.
BACKGROUND ART
Finishing the exposed surface of new paint such as on an
automobile, (particularly paint of the type called BC/CC
(basecoat/clearcoat) which is a two-part paint system and is
commonly used in after market painting of automobiles but also
including other types of paint), typically includes (1) initial
color sanding which is done by hand using fine grit abrasive (e.g.,
1200 to 1500 grit) that provides substantial smoothing or leveling
of the paint surface but results in surface scratches from the
abrasive grit; (2) one or more intermediate compounding operations
in which a liquid or paste rubbing compound containing a finer
abrasive is applied by a machine rotated compounding pad having
tufts of all wool or a wool and synthetic fiber blend to remove the
scratches that result from the color sanding operation, which
compounding operation leaves swirl marks on the paint; (3) a
machine gluing operation in which a glaze including a yet finer
abrasive is applied using a glazing or polishing pad to remove the
swirl marks, which machine glazing operation leaves wheel marks
that are particularly noticeable on dark color paints; and (4) a
final hand glazing operation in which a glaze including an even
finer abrasive is applied by hand in an attempt to remove the wheel
marks. Often, the hand glazing operation fills some of the wheel
marks rather than removing them, so that after a short period of
time or when the paint is subsequently washed, the fill in the
wheel marks is removed and they can again be seen.
One type of pad commonly used for the machine gluing operation has
tufts of a finer wool or wool blend than the compounding pad
described above, while another type of pad used for the machine
gluing operation is a foam pad (see U.S. Pat, No. 3,418,675)
comprising a layer of open cell polymeric foam (e.g., two pound
polyester urethane 5 centimeters (2 inches) thick and 15 or 20
centimeters (6 or 8 inches) in diameter) having a planar front
surface by which the glaze is applied, and means for attaching a
rear surface of the pad to a support surface on a back up pad of a
drive unit, which, in at least one known foam pad, releasably
attaches to the back up pad to facilitate changing foam pads. While
such foam pads can be machine driven and used with commercially
available glazes normally used for the hand glazing process
(particularly including the glaze commercially identified as
"IMPERIAL" machine glaze available from Minnesota Mining and
Manufacturing Company (3M), St. Paul, Minn.) to remove wheel marks
on test panels coated with black paint of the BC/CC type indicated
above instead of using the hand glazing operation, such use of such
foam pads presents several problems, including long working time
apparently because of the low absorbency of the foam pads. Also,
such foam pads have a tendency to sling glaze onto an adjacent area
which may already have been finished. Build up of dried glaze on
the surface of the foam pad can be deposited on the paint surface,
resulting in a smear on that surface; and when the painted surface
is almost dry and the final gloss is near, such foam pads have a
tendency to grab the paint surface which causes vibration or
chatter and operator fatigue.
DISCLOSURE OF THE INVENTION
The present invention provides a new foam pad for finishing the
exposed surface of paint that can be machine driven and used with
commercially available glazes normally used for the hand glazing
process to remove wheel marks from the paint being finished instead
of using the hand glazing operation, which new foam paint finishing
pad, when compared to the foam pad described above, reduces
slinging and working time, and greatly restricts smearing and the
tendency of the new paint finishing pad to grab or chatter on the
paint surface.
According to the present invention there is provided a paint
finishing pad for finishing the surface of paint that is adapted to
be used on a drive assembly including a back up pad having a
generally planar support surface and a drive motor for moving the
back up pad in a plane parallel to the support surface. The paint
finishing pad comprises a layer of open cell polymeric foam (e.g.,
two pound polyester urethane foam) having a generally planar rear
surface and an opposite front surface defined by a plurality of
spaced projecting portions of the layer defining recess between the
projecting portions; and attachment means attached to the rear
surface for attaching the paint finishing pad to the support
surface of the drive assembly, which attachment means preferably
are releasable to afford changing paint finishing pads.
In a presently preferred embodiment, the layer of open cell foam is
a commercially available foam available from Illbruck, Minneapolis,
Minn. under the trade designation Standard Convoluted "SCOTFOAM"
P-80 (a two pound reticulated open cell foam which has a
compression deflection value of about 0.4 pounds per square inch
when compressed twenty five percent and of about 0.65 pounds per
square inch when compressed sixty five percent in accordance with
the test procedure in ASTM D3574 as is indicated in publication No.
FS1001 by Scotfoam Corporation, 1500 East Second Street, Eddystone,
Penna. 19013, the content whereof is incorporated here by
reference.Iadd., which published compression deflection values are
generally midrange of the ranges of compression deflection values
for the foam as manuafctured, which ranges are generally about 0.29
to 0.49 pounds per square inch when the foam is compressed twenty
five percent and generally about 0.43 to 0.77 pounds per square
inch when the foam is compressed sixty five percent in accordance
with the test procedure in ASTM D3574.Iaddend.) in which foam the
projecting portions are disposed in a regular rectangular or square
array, the layer has ridge portions recessed a first distance from
the distal ends of the projecting portions and extending between
adjacent projecting portions, and the layer has a rectangular array
of sockets recessed a second distance greater than (about twice)
the first distance from the distal ends of the projecting portions,
with each of the sockets being bounded by the ridges between four
adjacent projecting portions; it being preferred that the
projecting portions of the layer project more than about 0.64
centimeter (0.25 inch) beyond the recesses defined between the
projecting portions (i.e., the second distance is more than about
0.64 centimeter (0.25 inch)).
BRIEF DESCRIPTION OF DRAWING
The present invention will be further described with reference to
the accompanying drawing wherein like reference numerals refer to
like parts in the several views, and wherein:
FIG. 1 is a front view of a first embodiment of a finishing pad
according to the present invention for finishing the surface of
paint;
FIG. 2 is a sectional view taken approximately along line 2--2 of
FIG. 1;
FIG. 3 is a sectional view taken approximately along line 3--3 of
FIG. 1; and
FIG. 4 is a reduced side view of a combination of a back up pad
from a drive assembly and the paint finishing pad shown in FIG.
1.
DETAILED DESCRIPTION
Referring now to the drawing, there is shown a paint finishing pad
according to the present invention generally designated by the
reference numeral 10.
The paint finishing pad 10 is adapted to be used on a rotary drive
assembly including a generally planar circular support surface 11
on a back up pad 9 (e,g., preferably the back up pad available from
Minnesota Mining and Manufacturing Company, St. Paul, Minn. (3M)
under the trade designation "part no. 051131.05717 Backup Pad")
rotatable by a motorized drive unit (e.g., a standard automotive
type polisher adapted to rotate the back up pad 9 at a speed in the
range of about 1200 to 3000 R.P.M. such as the single or variable
speed electrically activated drive units available from Black and
Decker Inc., Hunt Valley, Md, or the variable speed air pressure
activated drive unit available from Chicago Pneumatic Tool Company,
Utica, N.Y.) about a central axis 8 normal to the support surface
11. The paint finishing pad 10 comprises a layer 12 of open cell
polymeric foam having a circular periphery 13 of a slightly larger
diameter than the support surface 11 (e.g., the circular periphery
13 being about 20 centimeters (8 inches) in diameter, and the
support surface 11 being about 17 centimeters (6.75 inches)in
diameter), a generally planar rest surface 14, and an opposite
front surface 15 defined by a plurality of spaced projecting
portions 16 of the layer defining recess between the projecting
portions 16; and means attached to the rear surface 14 for
releasably attaching the paint finishing pad 10 to the support
surface 11 of the back up pad 9 which as illustrated is an
attachment layer 20 of material adhered to the rear surface 14 of
the layer 12 of foam as by a hot melt adhesive or by flame
laminating and having a plurality of projecting loops 21 adapted to
be releasably engaged by projecting hooks 19 along the support
surface 11 of the back up pad 9, which attachment layer 20 is
porous and preferably made in the manner described in U.S. Pat. No.
4,609,581 (the content whereof is incorporated herein by reference)
for placing loops 14 in a carrier web 12 of a structure described
in that patent. Attachment of the attachment layer 20 of material
to the layer 12 of foam by a porous web (e.g., 50 percent open
area) of hot melt adhesive (e.g., "SHARNET" 4200, available from
Sharnet Corp., Ward Hill, Mass.) or by flame laminating has been
found to provide passageways between the attachment layer 20 and
layer 12 of foam that afford passage of liquid therebetween to
facilitates cleaning of the paint finishing pad 10.
As illustrated, the layer 12 of foam is a commercially available
foam of the type available from Illbruck under the trade
designation Standard Convoluted "SCOTFOAM" P-80 (a two pound
reticulated open cell polyester urethane foam) in which foam, as
illustrated, the projecting portions 16 are disposed in a regular
rectangular or square array, the layer 12 has ridge portions 22
recessed a first distance from the distal ends of the projecting
portions 16 and extending between adjacent projecting portions 16,
and the layer 20 of foam has a rectangular array of sockets 23
recessed a second distance greater than the first distance from the
distal ends of the projecting portions 16, with each of the sockets
23 being bounded by the ridge portions 2 between four adjacent
projecting portions 16; it being preferred that the projecting
portions 16 of the layer 20 of foam project more than about 0.64
centimeter (0.25 inch) beyond the recesses defined between the
projecting portions 16 (i.e., the second distance is more than
about 0.64 centimeter (0.25 inch)).
In use, the motorized drive unit (not shown) rotates the back up
pad 9 about its axis 8 and/or reciprocates the back up pad 9 so
that the paint finishing pad 10 is moved in a plane parallel to the
support surface 11 of the back up pad 9 and can be used to glaze or
polish a surface. If it is then desired to change the paint
finishing pad 10 (e.g., because pores of the paint finishing pad 10
have become loaded with glaze) the paint finishing pad 10 can be
stripped away from the support surface 11, and replaced with a
fresh paint finishing pad.
Test Results
The following test was run to determine the effect of different
size recesses in a paint finishing pad 10 of the type described
above. Six test panels were first painted with black BC/CC paint of
the type described above and then were sequentially hand sanded
with "MICROFINE 1500" abrasive paper (available from 3M),
compounded using "IMPERIAL" microfinish compound (available from
3M) applied with a part no 5701 double sided "SUPERBUFF"
compounding pad (available from 3M), and glazed with "FINESSE-IT
II" glazing compound (available from 3M) applied with a part no.
5705 "SUPERBUFF" glazing pad (available from 3M). Different ones of
the panels were then again glazed with "IMPERIAL" hand glaze (a
glaze available from 3M that is normally applied by hand) using
different paint finishing pads 10 of the type described above in
which the projecting portions 16 of the layer 20 of foam projected
different distances above the bottoms of the sockets 23 including
0.64, 1.3, 1.6, 1.9 and 2.2 centimeters (1/4, 1/2 , 5/8, 3/4 and
7/8 inch), all of which paint finishing pads 10 were about 20
centimeters (8 inches) in diameter, had thicknesses at the bottoms
of the sockets 23 of about 0.64 centimeter (1/4 inch) and were made
of Standard Convoluted "SCOTFOAM" P-80 obtained from Illbruck, and
using a pad 20 centimeters (8 inches) in diameter and 2.5
centimeters (1 inch) thick of the same foam but having a flat
surface by which the glaze was applied. The paint finishing pad 10
on which the projecting portions 16 of the layer 20 of foam
projected 0.64 centimeter (1/4 inch) above the bottoms of the
sockets 23 required a working time of 1 minute 42 seconds, produced
an excellent swirl free surface, but when the painted surface was
almost dry and the final gloss was near, had a slight tendency to
grab the paint surface and cause vibration or chatter. The paint
finishing pads 10 on which the projecting portions 16 of the layer
20 of foam projected greater than 0.64 centimeter (1/4 inch) above
the bottoms of the sockets 23 required shorter working times of
about 1 minute 20 seconds, produced excellent swirl free surfaces
which were almost as good as the surface produced by the foam in
which the projecting portions 16 of the layer 20 of foam projected
0.64 centimeter (1/4 inch) above the bottoms of the sockets 23, and
had no tendency to grab the paint surface and cause vibration or
chatter when the painted surface was almost dry and the final gloss
was near. In contrast, the pad with the flat surface for applying
the glaze required the longest working time of 2 minutes 5 seconds,
could not remove all the swirls from the surface, and when the
painted surface was almost dry and the final gloss was near, had a
definite tendency to grab the paint surface and cause vibration or
chatter.
Paint finishing pads 10 made of the Standard Convoluted "SCOTFOAM"
P-80 obtained from Illbruck have also been tested for their ability
to apply rubbing compound to remove the scratches that result from
the color sanding operation, which tests have resulted in
marginally acceptable results, and the belief that better results
would be obtained if a stiffer foam was substituted for the foam
tested.
The present invention has now been described with reference to one
embodiment and several variations thereof. It will be apparent to
those skilled in the art that many changes can be made in the
embodiment described without departing from the scope of the
present invention. Thus the scope of the present invention should
not be limited to the structure described in this application, but
only by structures described by the language of the claims and the
equivalents of those structures.
* * * * *