Patent US4337184A successfully refreshed from Google Patents.
Patent US4134283A successfully refreshed from Google Patents.
US4134283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strip-processing lines with cold-rolling stands
Assignee: Braunschweigische Wissenschaftliche Gesellschaft
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Filing: 1977-02-11
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Granted: 1979-01-16
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Expires: 1997-02-11
Abstract
Abstract A strip-processing line for the continuous after-rolling of metal strip between a pair of bridles. According to the invention the drive motors of the upper and lower cold-rolling rollers are hydraulically driven, the rollers are controlled by the speed of the strip in one phase of operation and by the pressure or force with which the rollers are urged against the strip in a second phase.
Inventors
- 👤 Oskar F. Noe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:51
CPC Classifications
B; B21; B21B; B21B37/00; B21B37/46; B21B13/00; B21B13/02; B21B1/00; B21B1/22; B21B2001/228; B21B1/38; B21B2001/383; B21B2013/025; B21B15/00; B21B2015/0071; B21B35/00; B21B2035/005; B21B37/58; B21B37/62; B21B39/00; B21B39/02; B21B39/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
120 words
A cold after-rolling apparatus for a strip-process line, comprising: a rolling stand having an upper and a lower roll traversed by a strip; respective motors connected to said rolls for driving same; pressure means for pressing said rolls against said strip and relieving the pressure of said rolls against said strip; means for energizing said motors, thereby driving said rolls; first control means responsive to the peripheral speeds of said rolls and the linear speed of said strip for controlling said motors to cause said rolls to accelerate to peripheral speeds equal to the linear speed of said strip; and second control means for thereafter controlling said motors in a moment control thereof while said rolls bear against said strip.
Claim 2
Dependent Claim
120 words
A cold after-rolling apparatus for a strip-process line, comprising: a rolling stand having an upper and a lower roll traversed by a strip; respective motors connected to said rolls for driving same; pressure means for pressing said rolls against said strip and relieving the pressure of said rolls against said strip; means for energizing said motors, thereby driving said rolls; first control means responsive to the peripheral speeds of said rolls and the linear speed of said strip for controlling said motors to cause said rolls to accelerate to peripheral speeds equal to the linear speed of said strip; and second control means for thereafter controlling said motors in a moment control thereof while said rolls bear against said strip.
Claim 3
Dependent Claim
35 words
The apparatus defined in claim 1 wherein said second control means includes means responsive to said pressure means for controlling the rolling moment in proportion to the pressure with which said rolls engage said strip.
Claim 4
Dependent Claim
52 words
The apparatus defined in claim 2 wherein said motors are hydraulic motors, said energizing means is a hydraulic circuit provided witn a pump for supplying said hydraulic motors and said first control means includes respective speed sensors and flow control operated in response to said speed sensors between said pump and motors.
Claim 5
Dependent Claim
29 words
The apparatus defined in claim 3 wherein said second control means includes a pressure sensor and means responsive to said pressure sensor and varying the displacement of said pump.
Claim 6
Dependent Claim
23 words
The apparatus defined in claim 4 wherein said speed sensors have respective measuring wheels engaging the peripheries of said rolls and said strip.
Claim 7
Dependent Claim
47 words
The apparatus defined in claim 4 wherein said hydraulic circuit includes a pair of electronically actuatable multi-path valves between said pump and said hydraulic motors for switching over the control of said hydraulic motors from said first control means to said second control means and vice versa.
Claim 8
Dependent Claim
27 words
The apparatus defined in claim 4 wherein said hydraulic motors during moment control supply up to 90% of the force required to displace said strip through stand.
Claim 9
Dependent Claim
17 words
The apparatus defined in claim 1 wherein said first and second control means include analog electronic elements.
Claim 10
Dependent Claim
13 words
The apparatus defined in claim 8 wherein said electronic elements are operational amplifiers.
Claim 11
Dependent Claim
17 words
The apparatus defined in claim 1 wherein said first and second control means include digital electronic elements.
References Cited (Backward Citations)
US3559431A
Cited
US3764050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-15 | 1982-07-17 | 1983-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-15 | 1986-07-17 | 1987-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-15 | 1990-07-17 | 1991-01-16 | $7700.00 | Window Closed / Lapsed |