Patent US3891364A successfully refreshed from Google Patents.
US3891364A
Expired / Lapsed
US
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Apparatus for the continuous vulcanisation of endless belts
Assignee: HOXTERSCHE GUMMIFADENFABRIK EMIL ARNTZ KG
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Filing: 1974-07-22
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Granted: 1975-06-24
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Expires: 1994-07-22
Abstract
Abstract This invention relates to apparatus for the continuous vulcanisation of endless belts, particularly vee-belts. The apparatus has a vulcanising zone with two heatable, parallel, equidirectional and synchronously drivable vulcanising drums therein. The drums each have a helical groove for moving the belt continuously through said zone. Shrinkage in belt strengtheners can be overcome by vulcanising under tractive stress, and this reduces belt elongation during use.
Inventors
- 👤 Alexander Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:05
CPC Classifications
B; B29; B29D; B29D29/00; B29D29/10; B29K; B29K2021/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
58 words
Apparatus for the continuous vulcanisation of an endless belt, the apparatus having a vulcanising zone, and two heatable, parallel, equidirectional and synchronously drivable vulcanising drums therein, the drums each having a helical groove therein, the grooves in the two drums being of the same sense and pitch, and arranged to move the belt continuously through the vulcanising zone.
Claim 2
Dependent Claim
58 words
Apparatus for the continuous vulcanisation of an endless belt, the apparatus having a vulcanising zone, and two heatable, parallel, equidirectional and synchronously drivable vulcanising drums therein, the drums each having a helical groove therein, the grooves in the two drums being of the same sense and pitch, and arranged to move the belt continuously through the vulcanising zone.
Claim 3
Dependent Claim
21 words
Apparatus according to claim 1, wherein each vulcanising drum has an endless pressure belt partially looped therearound and in engagement therewith.
Claim 4
Dependent Claim
36 words
Apparatus according to claim 2, having gearing interconnecting said drums, and one pressure belt is arranged to drive one vulcanising drum directly, the resulting rotary movement being transmitted through said gearing to the other vulcanising drum.
Claim 5
Dependent Claim
50 words
Apparatus according to claim 1, having a stretching zone, two pressure bodies in said zone for loading the vulcanised belt, each said pressure body consisting of a freely rotatable conical portion and a freely rotatable cylindrical portion adjacent thereto, the conical portion consisting of independeent, adjacent and freely rotatable discs.
Claim 6
Dependent Claim
18 words
Apparatus according to claim 1, wherein the distance between the centers of the two vulcanising drums is variable.
Claim 7
Dependent Claim
27 words
Apparatus according to claim 4, wherein the thickness of each disc is less than the distance between two adjacent turns of the grooves in the vulcanising drum.
Claim 8
Dependent Claim
25 words
Apparatus according to claim 4, having a pivotable lever with one of said pressure bodies thereon, the levers being movable through a common screw-spindle drive.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |