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Патент USA US3082528

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March 26, 1963
M. o. HOLOWATY
3,082,517
METHOD OF PRODUCING SURFACE-ROUGHENED METAL STRIPS
Filed D60. 1, 1959
§
§
United States Patent 0 ” ice
3,082,517
Patented Mar. '26, 1953
1
2
3,082,517
lastingly adhere because of the sharp surface character
istics produced ‘by the novel method and apparatus.
The method by which the surface-roughened metal
METHQD @F PRODUCING SURFACE
ROUGEENED METAL STRIPS
sheet or strip is produced is one which permits the ready
Michael 0. Holowaty, Gary, Ind, assignor to Inland 5 removal of the material used to surface-roughen the
Steel Company, Chicago, 111., a corporation of Dela
sheet or strip. The method employed produces a surface
ware
roughened metal sheet or strip in a more economical man
Filed Dec. 1, 1959, Ser. No. 856,411
ner than heretofore possible and one which will stand the
7 Ciaims. (Cl. 29-424)
test of hard use.
In the accompanying drawing:
This invention relates to a novel method of producing 10
FIG. 1 shows in side elevation one form of apparatus
surface-roughened metal sheets or strips. The purpose
of the invention is to surface-roughen a metal sheet or
for practicing the invention;
‘FlG. 2 is an enlarged plan view of a portion of a
strip preparatory to its use in subsequent painting, enamel
roughened metal sheet or strip emphasizing in particular
ing, varnishing and other similar surface treatments.
A long known method for producing surface-roughened 15 the indentations therein; and
FIG. 3 is a sectional view through a processed rough
metal sheets or strips has been that of sandblasting the
ened metal sheet or strip showing particularly its surface
surface in order to produce adherence of any paint,
characteristics and formation.
enamel or varnish or other similar application which
For the purpose of illustrating apparatus for prac
might be used as a ?nish or coating thereon. This method
has been far from completely satisfactory, primarily be 20 ticing the method here claimed reference may be made
cause sand particles tend to remain embedded in the so
treated surface thereby creating an uneven ?nish upon
to the accompanying drawing showing apparatus which
‘is particularly suitable. First making reference to FIG.
1, a base metal strip 10, such as steel is fed over a con
the application of paint, enamel or varnish thereon.
veyor device of which rolls 11 are shown carrying the
Sandblasting has also been unsatisfactory due to the cost
of the method and the always present hazard of the work 25 metal sheet or strip. The abrasive particles 12 shown
being fed onto the metal strip 10 are contained in hopper
ers in the art contracting silicosis from exposure to dust
13 which is adapted for feeding said abrasive particles.
contaminated air in the region of the processing opera
The abrasive particles or materials being ?nely divided
tion.
and thus capable of being fed through the hopper. After
Several other methods of producing surface-roughened
metal sheets or strips have been tried, but for various 30 the base metal sheet or strip 110‘ has been coated with the
reasons these have proven unsatisfactory and too costly.
abrasive particles 12, a second sheet or strip 14 is un
By the present invention surface-roughened sheets or
coiled from coiling reel 15 upon the vabrasive particles 1-2
strips are produced on a novel apparatus at less cost than
so that said particles are sandwiched ‘betwmn the two
sheets or strips 10 ‘and 14, respectively. Both sheets or
has heretofore been possible. In practicing this inven
tion the steps of spreading an adhesive compound on the 35 strips are then ‘further conveyed through the set of pres
sure rolls 16 and 17, said pressure rolls being driven or
surface of the metal sheet or strip, covering the adhesive
coated surface with abrasive particles, applying pressure
to the so-coated strip or sheet for the purpose of em
rotated through the gear chain 18, 119, ‘20 and 21 by power
means 22 for driving the metal strips through the appara
tus. Other driving linkages such as belts, chains or the
bedding the abrasive particles into the strip or sheet and
the removal of the abrasive particles therefrom leaving 40 like may be used instead ofthe gear chain shown for pur
poses of rotating the pressure rolls. The upper pressure
the roughened surface on the sheet or strip can be ac
roll 17 is spring biased by spring 23 though adjustable
complished at relatively low cost with increased effective
ness in the adherence characteristics of the surface.
The surface-roughened sheets are produced according
means 24 so that the opening between rolls 16 and 17 is
adjusted preferably to an opening which permits the
to one method of practicing the invention by the use of 45 particles 12 to be partially embedded in the surfaces of the
two sheets 10 and 14. The sheets or strips ‘are then con
apparatus which is comprised of a frame through which
veyed through a second set of pressure rolls 26 and 27
runs a conveyor upon which the sheets are conveyed to a
which are geared through the gear chain 28, 29, 20 and
hopper adapted to feed the abrasive particles or grit onto
21 to the power means 22 for driving or rotating the sec
the upper surface of a metal sheet or strip, the particles
or grit are then covered by a second metal sheet and the 50 ond set of pressure rolls. The pressure roll 26 is spring
biased by spring 30, the tension of which can be adjusted
two sheets with the abrasive particles or grit therebe
by the adjusting means 31. The opening between pres
tween are conveyed through pressure rolls where they are
sure rolls 26 and 27 is set so as to further embed the abra
subjected to pressure which embeds the particles or grit
sive particles in the surface of the sheets or strips ‘for the
into the surface of the two metal sheets at desired depths,
these depths being controlled by the adjustable means lo 55 purpose of setting them more ?rmly into the surface
thereof so as to produce sharper characteristics on the
cated on each set of rolls to control the opening between
indentations left in the surface but the particles should
each set of rolls. This method of embedding the par
not be completely embedded into the surfaces to permit
ticles into the surface of the metal sheets protects the
removal of the same. The sheets with the abrasive par
pressure means from the abrasive particles, because the
ticles 12 embedded into the surface thereof are then con
pressure means and the particles are never in direct con
veyed through the apparatus to apoint where they are
tact with each other. After having embedded the par
separated by rolls 32 and '33 so as to expose the abra
ticles into the surface of the metal, the sheets are sepa
sive particles in a manner to permit their removal from
rated and the particles or grit removed from the surface
the surfaces of the sheets by the rotary brushes 34 and 35
of each sheet by rotary brushes in conjunction with a
liquid bath from sprinklers which are attached to the 65 and Washed free by the sprinkers ‘36 and 37 operating
in conjunction with the said rotary brushes.
frame. The roughened sheets are then coiled on reels
The now surface-roughened metal sheets or strips are
in which form they are used in the trade where any de
sired length can be readily cut from the coiled product.
coiled onto coiling reels 38 and 39, respectively, which
From the foregoing it is apparent that this invention
permits the ready handling of the Surface-roughened
provides to the trade a surface-roughened metal sheet or 70 sheets for the purpose of sale and use in the trade. Hav
strip to which paint, enamel, varnish and similar materials
ing the sheets or strips in coil form permits the cutting
may be applied and to which said materials will more
thereof into desired lengths so that the user need stock
3,082,517
4
only one coil instead of several sheets or strips which
have been pre-cut.
The abrasive particles upon being freed from the sur
face of the sheets or strips .are collected in a trough 4d,
partly shown, from where they are regenerated by con
centration drying or the like and reclaimed for further
use in the process. The selection of the abrasive particles
of the metal sheet, and washing the metal sheet to further
cleanse the surface thereof leaving a roughened surface
thereon.
4. A method of producing surface-roughened metal
sheets comprising the steps of: coating a surface of a
first sheet with abrasive particles, covering the abrasive
coated surface of said ?rst sheet with a second sheet of
12 as to composition, particle size and shape is based
metal, applying pressure to the sheets with the abrasive
upon the requirements imposed by the application of
particles sandwiched therebetween for embedding the
the sheet or strip after being surface-roughened and by 10 abrasive particles into the surface of each sheet, separating
the grade and type of metal used as the sheet or strip.
the sheets and removing the abrasive particles from the
The uniformity of feeding the abrasive particles 12 upon
surface of each sheet leaving roughened surfaces thereon.
the lower sheet or strip 10 is one that is easily effected
5. A method of producing surface-roughened metal
by a primary coating of the strip 10‘ with a material
sheets comprising the steps of: spreading an adhesive com
having adhesive characteristics upon which the abrasive 15 pound onto the surface of a ?rst sheet of metal, coating
particles 12 are deposited. The abrasive particles 12 may
the adhesive containing surface of said ?rst sheet of metal
either be applied uniformly or selectively according to
with abrasive particles, covering the abrasive coated sur
a preferred design if such a design is sought to be im
face of said ?rst sheet with a second metal sheet, apply
pressed into the surface of metal sheets or strips.
ing pressure to the sheets with the abrasive particles
In FIGS. 2 and 3 are shown views of the surface
sandwiched therebetween for embedding the abrasive par
roughened metal sheets 10 and 14 formed by practicing
ticles into the surface of the metal sheets, separating the
the described method with the indentations therein clear
sheets and removing the abrasive particles from the sur
ly shown. These indentations being irregular in shape
face of each sheet leaving roughened surfaces thereon.
and having sharp surfaces produce a surface-roughened
6. A method of producing surface-roughened metal
metal sheet or strip to ‘which paint, enamel, varnish or
sheets comprising the steps of: spreading an adhesive
other material to be applied thereto will more readily
compound onto the surface of a ?rst sheet of metal, coat
ing the adhesive containing surface with abrasive particles,
adhere.
While the above described method may be convenient
covering the abrasive coated surface of the ?rst sheet of
ly practiced by the apparatus shown and described it will
metal with a second sheet of metal thereby sandwiching
be apparent that the invention may be practiced by the use 30 the abrasive particles therebetween, applying pressure
of other related apparatus, as a result of which all modi?
to the" sheets with the abrasive particles sandwiched there
cations which fall within the scope of the following claims
between for embedding the abrasive particles into the
will be understood to have been intended.
surface of the metal sheets, separating the sheets and
brushing and washing the abrasive particles from the
What is claimed is:
l. A method for producing a surface-roughened metal 35 surface of each of said sheets leaving a roughened sur
sheet comprising the steps of: covering the surface of a
face thereon.
7. A method of producing surface-roughened metal
metal sheet with abrasive particles, applying pressure to
the abrasive particles through an intermediate surface
sheets comprising the steps of: spreading an adhesive
compound onto the surface of a ?rst sheet of metal, coat
to embed them into the covered surface of the metal
sheet and subsequently removing the abrasive particles 40 ing the adhesive covered surface of said ?rst sheet of
from the covered surface of the metal sheet leaving a
metal with abrasive particles, covering the abrasive coated
surface of said ?rst sheet of metal with a second sheet
roughened surface thereon.
2. A method of producing a roughened metal sheet
of metal, applying pressure to the sheets with the abrasive
comprising the steps of: spreading an adhesive compound
particles sandwiched therebetween for embedding the
onto the surface of a metal sheet, covering the adhesive 45 abrasive particles into the surface of each sheet, separat
coated surface with abrasive particles, applying pressure
ing the metal sheets, brushing and washing the abrasive
to the abrasive particles through an intermediate sur
particles from the surface of each sheet and coiling the
surface-roughened sheets onto coiling reels.
face to embed them into the surface of the metal sheet
and removing the abrasive particles from the covered
References Cited in the ?le of this patent
surface of the sheet leaving a roughened surface thereon. 50
3. A method of producing a surface-roughened metal
UNITED STATES PATENTS
sheet comprising the steps of: spreading an adhesive com
264,174
Lenox ______________ __ Sept. 12, 1882
pound onto the surface of the metal sheet, covering said
2,020,177
Grove ______________ __ Nov. 5, 1935
adhesive coated sheet with abrasive particles, applying 55 2,036,615
Wean _______________ __ Apr. 7, 1936
pressure through an intermediate member to the abrasive
particles to embed them into the surface of the metal
sheet, brushing the abrasive particles from the surface
2,180,078
2,528,540
2,765,682
Wilkie ______________ __ Nov. 14, 1939
Oldofredi ___________ __ Nov. 7, 1950
Wiley _______________ __ Oct. 9, 1956
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