Patent US3726627A successfully refreshed from Google Patents.
US3726627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vulcanizing of rubber and other like sheet material
Assignee: KraussMaffei Extrusion GmbH
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Filing: 1971-03-09
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Granted: 1973-04-10
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Expires: 1991-03-09
Abstract
Abstract Apparatus for vulcanizing rubber and other like sheet material comprises a heated drum against which the sheet material is pressed by two overlying endless belts. The endless belts are entrained around discrete sets of guide rollers.
Inventors
- 👤 R Gersbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:32
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/22; B29C43/28; B29C35/00; B29C35/02; B29C35/0277; B29K; B29K2021/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
119 words
Apparatus for vulcanizing rubber and other like sheet material, said apparatus comprising a first endless belt, a first discrete set of guide rollers, a second endless belt, a second discrete set of guide rollers, and a heated rotary drum, said first endless belt being entrained only around said first set of guide rollers and a portion of said drum, and said second endless belt being entrained only around said second set of guide rollers and a portion of the drum, the part of said second endless belt entrained around the drum overlying the part of the first endless belt entrained around the drum, and said sheet material being pressed against said drum by said parts of both endless belts.
Claim 2
Dependent Claim
119 words
Apparatus for vulcanizing rubber and other like sheet material, said apparatus comprising a first endless belt, a first discrete set of guide rollers, a second endless belt, a second discrete set of guide rollers, and a heated rotary drum, said first endless belt being entrained only around said first set of guide rollers and a portion of said drum, and said second endless belt being entrained only around said second set of guide rollers and a portion of the drum, the part of said second endless belt entrained around the drum overlying the part of the first endless belt entrained around the drum, and said sheet material being pressed against said drum by said parts of both endless belts.
Claim 3
Dependent Claim
26 words
Apparatus as claimed in claim 1 wherein one of said endless belts comprises sheet steel, and the other of said endless belts comprises a woven material.
References Cited (Backward Citations)
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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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |