US3668786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Facility for heating a product in strip
Assignee: SOC D'ETUDES ET DE VANTE DE MATERIELS POUR LA FABRICATION ET LE FACONNAGE DU CARTON ONDULE-MARTIN
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Filing: 1969-05-08
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Granted: 1972-06-13
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Expires: 1989-05-08
Abstract
Abstract A heating facility for strip product including a heating bed over which the strip travels and variable pressure devices which urge the strip toward the bed.
Inventors
- 👤 Jean Jacques Barny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:08
CPC Classifications
B; B31; B31F; B31F1/00; B31F1/20; B31F1/24; B31F1/26; B31F1/28; B31F1/2845; B31F1/285
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
112 words
A facility for heating a product in strip form comprising a heating surface over which the strip is movable and means for maintaining the strip in contact therewith, said means including a continuous belt loaded by evenly spaced idler rollers, each roller exerting on said belt its own weight and at least one pressure-gas-energized ram connected to each of said rollers to increase the load on said belt, said rams being pressure-fluidenergized, at least one valve controlling the fluid pressure to said rams, a servomotor controlling said valve and regulating means controlling said servomotor receiving information relating to the speed of strip movement and information relating to the position of said servomotor.
Claim 2
Dependent Claim
112 words
A facility for heating a product in strip form comprising a heating surface over which the strip is movable and means for maintaining the strip in contact therewith, said means including a continuous belt loaded by evenly spaced idler rollers, each roller exerting on said belt its own weight and at least one pressure-gas-energized ram connected to each of said rollers to increase the load on said belt, said rams being pressure-fluidenergized, at least one valve controlling the fluid pressure to said rams, a servomotor controlling said valve and regulating means controlling said servomotor receiving information relating to the speed of strip movement and information relating to the position of said servomotor.
Claim 3
Dependent Claim
53 words
A facility as set forth in claim 1, said regulating means including a voltage comparator receiving a first voltage, a tachometer dynamo driven at a speed proportional to strip speed providing said first voltage, and receiving a second voltage, and a potentiometer associated with the position of said servomotor providing said second voltage.
Claim 4
Dependent Claim
26 words
A facility as set forth in claim 2, said valve including a manual control facility independent of the servomotor control, the two controls being usable simultaneously.
Claim 5
Dependent Claim
31 words
A facility as set forth in claim 1, including a solenoid actuated valve for said rams associated with a single roller, and a switch for each of said solenoid actuated valves.
Claim 6
Dependent Claim
35 words
A facility as set forth in claim 4, said switches being controlled by a cam, a servomotor rotating said cam and regulating means for said servomotor receiving information relating to the speed of strip movement.
Claim 7
Dependent Claim
18 words
A facility as set forth in claim 4, said rams being double-acting and said solenoid valves being reversible.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |