Patent US3711912A successfully refreshed from Google Patents.
US3711912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support roller for conveyor belts and the like
Assignee: Individual
•
Filing: 1971-02-05
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Granted: 1973-01-23
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Expires: 1991-02-05
Abstract
Abstract A cylindrical supporting roller comprises a central core of a light-weight material having a low density and a casing extending over the surface of the core which comprises a material having a substantially greater density to reinforce the core. Both the core and the casing may comprise a closed pore foam material such as polyurethane, the density of polyurethane in the casing being greater than that of the core.
Inventors
- 👤 F Teske
- 👤 L Teske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:07
CPC Classifications
F; F16; F16C; F16C13/00; B; B29; B29D; B29D99/00; B29D99/0032; B29D99/0035; B65; B65G; B65G39/00; B65G39/02; B65G39/06; C; C03; C03B; C03B35/00; C03B35/14; C03B35/16; C03B35/18; C03B35/183; C03B35/186; B29L; B29L2031/00; B29L2031/32; B29L2031/324
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
16 words
A roller construction as defined in claim 1 wherein the synthetic plastic foam material comprises polyurethane.
Claim 2
Dependent Claim
50 words
A roller construction as defined in claim 2 wherein said synthetic plastic foam material comprIses cross-linked polyurethane, the cross-linked polyurethane of said greater density portion of said roller body adjacent the surfaces thereof having a greater degree of cross-linking than that internal portion contained within said portion adjacent said surfaces.
Claim 3
Dependent Claim
45 words
A roller construction as defined in claim 1 wherein said bearing means comprises a plurality of journals mounted in the portion of said foam material surrounding said bore and having the greater density, said journals being mounted adjacent the opposite ends of said roller body.
Claim 4
Dependent Claim
191 words
A cylindrical supporting roller construction for conveyor belts and the like comprising: a. an annular longitudinally extending roller body having a centrally located longitudinally extending bore, said roller body having a cylindrical peripheral surface, annular end surfaces and a surface surrounding said bore, b. a spindle positioned within said bore, the external surface of said spindle being spaced from the surface of said roller body surrounding said bore, and c. bearing means positioned within said bore internally of said roller body between the opposite ends thereof for rotatably mounting said roller body on said spindle, d. said roller body consisting of a synthetic plastic foam material having closed pores, the portion of said foam material adjacent to said peripheral and end surfaces and said surface surrounding said bore being of greater density than the internal portion contained within said portion adjacent said surfaces, and a cylindrically shaped wire or synthetic fiber filament reenforcement embedded in said internal portion of said foam material and extending between opposite ends of said roller body, e. whereby said roller body is reenforced and capable of supporting a conveyor belt while freely rotatable about said spindle.
Claim 5
Dependent Claim
16 words
A roller construction as defined in claim 5 wherein the synthetic plastic foam material comprises polyurethane.
Claim 6
Dependent Claim
50 words
A roller construction as defined in claim 6 wherein said synthetic plastic foam material comprises cross-linked polyurethane, the cross-linked polyurethane of said greater density portion of said roller body adjacent the surfaces thereof having a greater degree of cross-linking than that internal portion contained within said portion adjacent said surfaces.
Claim 7
Dependent Claim
45 words
A roller construction as defined in claim 5 wherein said bearing means comprises a plurality of journals mounted in the portion of said foam material surrounding said bore and having the greater density, said journals being mounted adjacent the opposite ends of said roller body.
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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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |