Patent US3663340A successfully refreshed from Google Patents.
US3663340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for production of textile, letter press and printing blankets
Assignee: WR Grace and Co
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Filing: 1970-06-24
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Granted: 1972-05-16
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Expires: 1990-06-24
Abstract
Abstract A rotary vulcanizing machine, particularly designed for the production of textile, letter-press and screen-print blankets. The compression belt, a glass cord reinforced rubber blanket, operates over small diameter (12 inches) rolls, and is tensioned by the thrust of hydraulic cylinders. The heated curing roll can be withdrawn from the machine and slid onto a wheeled carriage to move out of the way while a blanket to be cured is being dressed on the machine. The high strength of the compacting belt and its flexiblity while producing the same amount of compacting pressure eliminates the necessity of large diameter curing rolls for stainless steel belts saving cost, size, weight and floor space.
Inventors
- 👤 William C Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:50
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/22; B29C35/00; B29C35/02; B29C35/0277; B29C43/30; B29C43/305; B29K; B29K2021/00; Y; Y10; Y10T; Y10T156/00; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1741
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
222 words
A continuous blanket curing machine comprising: a. a base, b. a main frame, c. side members projecting upwardly from the base, arranged to support two fixed rolls, d. forwardly and rearwardly extending trackways formed on the side members, e. a pair of journal blocks, slideably arranged on each trackway, f. two rolls journaled on the said side members, g. a heated roll supported in the journal blocks carried on the forwardly extending trackway, h. a tensioning roll supported on the journal blocks carried by the rearwardly extending trackway, i. a compacting belt trained over the said two rolls and the tensioning roll, j. means to tension the belt by forcing the said tensioning roll to the rear, k. a movable carriage having a trackway capable of being aligned with the said forwardly extending trackway, l. means mounted on the said carriage adapted to advance and retract the heated curing roll whereby a vulcanizable sheet may be compressed between the said heating roll and the compacting belt, m. means to lock the said movable carriage to the main frame to prevent separation of the carriage from the frame when the curing roll is forced into its curing position, n. means associated with one of the said fixed rolls for driving the assembly, and o. means to conduct heat into the said curing roll.
Claim 2
Dependent Claim
222 words
A continuous blanket curing machine comprising: a. a base, b. a main frame, c. side members projecting upwardly from the base, arranged to support two fixed rolls, d. forwardly and rearwardly extending trackways formed on the side members, e. a pair of journal blocks, slideably arranged on each trackway, f. two rolls journaled on the said side members, g. a heated roll supported in the journal blocks carried on the forwardly extending trackway, h. a tensioning roll supported on the journal blocks carried by the rearwardly extending trackway, i. a compacting belt trained over the said two rolls and the tensioning roll, j. means to tension the belt by forcing the said tensioning roll to the rear, k. a movable carriage having a trackway capable of being aligned with the said forwardly extending trackway, l. means mounted on the said carriage adapted to advance and retract the heated curing roll whereby a vulcanizable sheet may be compressed between the said heating roll and the compacting belt, m. means to lock the said movable carriage to the main frame to prevent separation of the carriage from the frame when the curing roll is forced into its curing position, n. means associated with one of the said fixed rolls for driving the assembly, and o. means to conduct heat into the said curing roll.
Claim 3
Dependent Claim
32 words
A machine as claimed in claim 1 wherein the compacting blanket is a glass cord reinforced rubber blanket, and wherein the rolls in the said machine are approximately 12 inches in diameter.
Claim 4
Dependent Claim
40 words
A machine As claimed in claim 1 wherein the said tensioning roll is moved by an hydraulic cylinder attached to the main frame, and wherein the said curing roll is moved by an hydraulic cylinder attached to the movable carriage.
Claim 5
Dependent Claim
70 words
A machine as claimed in claim 1 wherein the means to project air and thereby cool the surface of a blanket undergoing vulcanization beyond its contact area with the said hot roll and said compacting blanket is a pipe provided with a plurality of orifices designed to project a sheath of air substantially uniformly across the surface of the blanket at the entrance and exit nips of the said machine.
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |