US3834000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a multi-webbed expanded steel panel
Assignee: Armco Inc
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Filing: 1972-10-20
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Granted: 1974-09-10
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Expires: 1992-10-20
Abstract
Abstract This application discloses a method of making a multi-webbed steel panel. It discloses the preparation of a starting sandwich comprising top and bottom plates and a plurality of web bars therebetween. The web bars are coated on both sides with a weldstop material except for stripes along opposite edges on opposite sides thereof. The assembled sandwich is fixed in position by means of edge bars and end bars, all of which are welded to the top and bottom plates to completely enclose the sandwich and to prevent shifting during rolling. This sandwich is then hot rolled in a series of passes to produce a reduction of at least 25:1 and even up to 75:1 to produce a long length of strip which is then sheared to length and the panel opened up by conventional means. Details of the stop-weld material and the manner of applying it are disclosed as well as rolling considerations involved.
Inventors
- 👤 G Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:41
CPC Classifications
B; B23; B23P; B23P13/00; E; E04; E04C; E04C2/00; E04C2/02; E04C2/08; E04C2/30; E04C2/34; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49623; Y10T29/49625
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
251 words
The method of making a multi-webbed steel panel, which includes the steps of: a. preparing a plurality of steel web bars by 1. accurately masking a stripe along one edge of the top surfaces of each, and coating the unmasked portions with a stop-weld material, 2. accurately masking a stripe along the bottom surfaces of each, and coating the unmasked portion with a stop-weld material, 3. coating both longitudinal edges of said web bars with a stop-weld material; b. assembling a sandwich comprising 1. a steel bottom plate, 2. a pluralIty of web bars in like oeientation and in laterally abutting relation, longitudinally of said plate, 3. an uncoated steel edge bar along each edge of said bottom plate, abutting the outermost of said web bars, 4. an uncoated steel end bar, abutting the ends of said web bars at each end of said plate, 5. a top plate of the same size as said bottom plate, 6. welding said end bars and edge bars to said top and bottom plates; c. heating said sandwich to a normal hot rolling temperature, d. hot rolling said heated sandwich in a first pass to produce a reduction of at least about 15 percent, e. thereafter carrying out further hot rolling passes to produce a reduction of at least 25:1, f. shearing the resultant strip to panel length, and g. opening the panel length by separating the outer layers of the hot rolled sandwich; whereby to produce a multi-webbed beam-panel having substantial structural strength.
Claim 2
Independent Claim
251 words
The method of making a multi-webbed steel panel, which includes the steps of: a. preparing a plurality of steel web bars by 1. accurately masking a stripe along one edge of the top surfaces of each, and coating the unmasked portions with a stop-weld material, 2. accurately masking a stripe along the bottom surfaces of each, and coating the unmasked portion with a stop-weld material, 3. coating both longitudinal edges of said web bars with a stop-weld material; b. assembling a sandwich comprising 1. a steel bottom plate, 2. a pluralIty of web bars in like oeientation and in laterally abutting relation, longitudinally of said plate, 3. an uncoated steel edge bar along each edge of said bottom plate, abutting the outermost of said web bars, 4. an uncoated steel end bar, abutting the ends of said web bars at each end of said plate, 5. a top plate of the same size as said bottom plate, 6. welding said end bars and edge bars to said top and bottom plates; c. heating said sandwich to a normal hot rolling temperature, d. hot rolling said heated sandwich in a first pass to produce a reduction of at least about 15 percent, e. thereafter carrying out further hot rolling passes to produce a reduction of at least 25:1, f. shearing the resultant strip to panel length, and g. opening the panel length by separating the outer layers of the hot rolled sandwich; whereby to produce a multi-webbed beam-panel having substantial structural strength.
Claim 3
Dependent Claim
19 words
accurately masking a stripe along the bottom surfaces of each, and coating the unmasked portion with a stop-weld material,
Claim 4
Dependent Claim
19 words
accurately masking a stripe along the bottom surfaces of each, and coating the unmasked portion with a stop-weld material,
Claim 5
Dependent Claim
17 words
a pluralIty of web bars in like oeientation and in laterally abutting relation, longitudinally of said plate,
Claim 6
Dependent Claim
17 words
a pluralIty of web bars in like oeientation and in laterally abutting relation, longitudinally of said plate,
Claim 7
Dependent Claim
23 words
The method of claim 1, wherein said stop-weld material is about 50 percent by weight alumina in pre-hydrolized ethyl silicate as a vehicle.
Claim 8
Dependent Claim
19 words
The method of claim 1, wherein said alumina has a particle size ranging between 1 micron and 150 microns.
Claim 9
Dependent Claim
19 words
an uncoated steel edge bar along each edge of said bottom plate, abutting the outermost of said web bars,
Claim 10
Dependent Claim
19 words
an uncoated steel edge bar along each edge of said bottom plate, abutting the outermost of said web bars,
Claim 11
Dependent Claim
17 words
coating both longitudinal edges of said web bars with a stop-weld material; b. assembling a sandwich comprising
Claim 12
Dependent Claim
17 words
coating both longitudinal edges of said web bars with a stop-weld material; b. assembling a sandwich comprising
Claim 13
Dependent Claim
18 words
an uncoated steel end bar, abutting the ends of said web bars at each end of said plate,
Claim 14
Dependent Claim
18 words
an uncoated steel end bar, abutting the ends of said web bars at each end of said plate,
Claim 15
Dependent Claim
21 words
The method of claim 1, wherein the thickness of said stop-weld coatings is from about 10 mils to about 30 mils.
Claim 16
Dependent Claim
30 words
The method of claim 1, wherein said sandwich, prior to rolling is about 15 feet long, and the hot rolling produces a reduction of from about 25:1 to about 75:1.
Claim 17
Dependent Claim
11 words
a top plate of the same size as said bottom plate,
Claim 18
Dependent Claim
11 words
a top plate of the same size as said bottom plate,
Claim 19
Dependent Claim
93 words
welding said end bars and edge bars to said top and bottom plates; c. heating said sandwich to a normal hot rolling temperature, d. hot rolling said heated sandwich in a first pass to produce a reduction of at least about 15 percent, e. thereafter carrying out further hot rolling passes to produce a reduction of at least 25:1, f. shearing the resultant strip to panel length, and g. opening the panel length by separating the outer layers of the hot rolled sandwich; whereby to produce a multi-webbed beam-panel having substantial structural strength.
Claim 20
Dependent Claim
93 words
welding said end bars and edge bars to said top and bottom plates; c. heating said sandwich to a normal hot rolling temperature, d. hot rolling said heated sandwich in a first pass to produce a reduction of at least about 15 percent, e. thereafter carrying out further hot rolling passes to produce a reduction of at least 25:1, f. shearing the resultant strip to panel length, and g. opening the panel length by separating the outer layers of the hot rolled sandwich; whereby to produce a multi-webbed beam-panel having substantial structural strength.
Claim 21
Dependent Claim
30 words
The method of claim 1, wherein the weld of the tail end bar to the top plate is interrupted to allow for expulsion of trapped gases during heating and rolling.
Claim 22
Dependent Claim
14 words
The method of claim 1, wherein the sheared pieces are roller-leveled prior to opening.
Claim 23
Dependent Claim
17 words
The method of claim 1, wherein the hot rolling steps are followed by a cold rolling pass.
Claim 24
Dependent Claim
26 words
The method of claim 1, wherein said masking is accomplished by means of masking tape which is removed after coating and before assembly of the sandwich.
Claim 25
Dependent Claim
31 words
The method of claim 1, wherein said masking is accomplished by means of a steel tape which is of the same thickness as the coating and left in place during assembly.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |