US3761077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blast air control device
Assignee: Sächsisches Institut für die Druckindustrie
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Filing: 1971-09-23
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Granted: 1973-09-25
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Expires: 1991-09-23
Abstract
Abstract A blast air control device for a sheet feeder with a device for the cyclic control of the blast air, which comprises a first device for the cyclic control of blast air and a second control device controlled by the feeder output as an input variable and associated with the first device. Means for regulating at least one of the pressure of the blast air and of the blast time over a wide output range of the feeder are provided in order to maintain automatically the optimum blast action.
Inventors
- 👤 K Vollrath
- 👤 W Paul
- 👤 F Fichte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:37
CPC Classifications
B; B65; B65H; B65H3/00; B65H3/46; B65H3/48; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87917
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
85 words
A blast air control device for a sheet feeder with a device for the cyclic control of the blast air, comprising a first device for the cyclic control of blast air, a second control device controlled by the feeder output as an input variable and associated with said first device, means for regulating at least one of the pressure of the blast air and of the blast time over a wide output range of the feeder, in order to maintain automatically the optimum blast action.
Claim 2
Dependent Claim
85 words
A blast air control device for a sheet feeder with a device for the cyclic control of the blast air, comprising a first device for the cyclic control of blast air, a second control device controlled by the feeder output as an input variable and associated with said first device, means for regulating at least one of the pressure of the blast air and of the blast time over a wide output range of the feeder, in order to maintain automatically the optimum blast action.
Claim 3
Dependent Claim
19 words
The blast air control device, as set forth in claim 1, which includes Means for adjusting different control characteristics.
References Cited (Backward Citations)
US3294396A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |