Patent USRE28868E successfully refreshed from Google Patents.
USRE28868E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming composite rolls
Assignee: United States Steel Corp
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Filing: 1974-09-18
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Granted: 1976-06-22
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Expires: 1994-09-18
Abstract
Abstract A method of forming a composite roll which has a hard wear resistant shell and a tough shock resistant arbor. The shell is adhesively affixed to the arbor, thus avoiding a shrink fit which places the shell under tension. The roll is adapted for use in applications where the arbor-shell interface reaches temperatures up to 400°F, and the adhesive must withstand these temperatures without breaking down. The preferred adhesive is a thermosetting epoxy material cured at an elevated temperature with an aromatic diamine.
Inventors
- 👤 Carl E. Spaeder, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:25
CPC Classifications
B; B21; B21B; B21B27/00; B21B27/02; B21B27/03; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49544; Y10T29/49547; Y10T29/49549
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
93 words
A method of forming a composite roll which has a hard wear-resistant metal shell and a tough shock-resistant arbor .Iadd.encircled by said shell.Iaddend., said method comprising: relatively machining the shell and arbor to provide a total clearance therebetween of 0.003 to 0.005 inch based on diameter when the parts are at room temperature; applying an adhesive to .Iadd.the cylindrical surface of the body of .Iaddend.said arbor; assembling the shell and arbor; heating the adhesive to its curing temperature; slowly cooling the assembled shell and arbor; and dressing the shell to its finished dimensions.
Claim 2
Independent Claim
93 words
A method of forming a composite roll which has a hard wear-resistant metal shell and a tough shock-resistant arbor .Iadd.encircled by said shell.Iaddend., said method comprising: relatively machining the shell and arbor to provide a total clearance therebetween of 0.003 to 0.005 inch based on diameter when the parts are at room temperature; applying an adhesive to .Iadd.the cylindrical surface of the body of .Iaddend.said arbor; assembling the shell and arbor; heating the adhesive to its curing temperature; slowly cooling the assembled shell and arbor; and dressing the shell to its finished dimensions.
Claim 3
Dependent Claim
14 words
A method as defined in claim 1 in which said shell is acicular iron.
Claim 4
Dependent Claim
30 words
A method as defined in claim 1 in which said adhesive is thermosetting epoxy material cured with an aromatic diamine and capable of withstanding a temperature of at least 212°F.
Claim 5
Dependent Claim
34 words
A method as defined in claim 1 comprising a further step of standing the arbor on end and effecting the step of assembling the shell and arbor by lowering the shell over the arbor.
Claim 6
Dependent Claim
34 words
A method as defined in claim 1 comprising a further step of standing the shell on end and effecting the step of assembling the shell and arbor by lowering the arbor into the shell.
Claim 7
Dependent Claim
23 words
A method as defined in claim 1 comprising a further step of relatively rotating said arbor and said shell as they are assembled.
Claim 8
Dependent Claim
40 words
A method as defined in claim 1 in which said shell is heated to a temperature sufficient to cure said adhesive before the shell is assembled with the arbor, and the heated shell supplies the heat for curing said adhesive.
Claim 9
Dependent Claim
28 words
A method as defined in claim 7 in which said shell is heated to a temperature about 50° to 100°F above the optimum curing temperature of the adhesive.
Claim 10
Dependent Claim
30 words
A method as defined in claim 1 in which said arbor has a bore, and said adhesive is heated to its curing temperature by injecting heated fluid through said bore.
Claim 11
Dependent Claim
26 words
A method as defined in claim 1 in which the assembled shell and arbor are slowly heated in a furnace to heat and cure said adhesive.
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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) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |