Patent US3670644A successfully refreshed from Google Patents.
US3670644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calender roll adjustment apparatus
Assignee: KraussMaffei Extrusion GmbH
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Filing: 1970-03-10
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Granted: 1972-06-20
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Expires: 1990-03-10
Abstract
Abstract Apparatus for adjusting the spacing between parallel calender rolls comprises a respective motor for moving each end portion of one of the rolls. Differences in the speeds of the motors causes movement of a member to switch off the motors.
Inventors
- 👤 Heinz Hoever
- 👤 Herbert Orth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:30
CPC Classifications
B; B21; B21B; B21B37/00; B21B37/58; B21B37/60; H; H02; H02P; H02P5/00; H02P5/46; H02P5/48; H02P5/49
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
216 words
Apparatus for adjusting the spacing between two nominally parallel elements, one of said elements Having first and second opposed end portions, said apparatus comprising a first motor, a first mechanical drive, said first motor being coupled by said first mechanical drive to the first said end portion of the said one of said elements and rotatable to move said end portion transversely relative to the other of said elements, a second motor, a second mechanical drive, said second motor being coupled by said second mechanical drive to the second said end portion of the said one of said elements and rotatable to move said end portion transversely relative to the other of said elements, a first shaft driven by said first mechanical drive, a second shaft driven by said second mechanical drive and lying adjacent said first shaft, switch means controlling said first and second motors, and a switch-actuating device having a switch-actuating portion, said switch-actuating device being interposed between said first and second shafts and rotating jointly with said first and second shafts, and said switch-actuating portion of said switch-actuating device being movable relative to said shafts to actuate said switch means to switch off said first and second motors when the angular displacement of said first and second shafts differs by a predetermined extent.
Claim 2
Dependent Claim
216 words
Apparatus for adjusting the spacing between two nominally parallel elements, one of said elements Having first and second opposed end portions, said apparatus comprising a first motor, a first mechanical drive, said first motor being coupled by said first mechanical drive to the first said end portion of the said one of said elements and rotatable to move said end portion transversely relative to the other of said elements, a second motor, a second mechanical drive, said second motor being coupled by said second mechanical drive to the second said end portion of the said one of said elements and rotatable to move said end portion transversely relative to the other of said elements, a first shaft driven by said first mechanical drive, a second shaft driven by said second mechanical drive and lying adjacent said first shaft, switch means controlling said first and second motors, and a switch-actuating device having a switch-actuating portion, said switch-actuating device being interposed between said first and second shafts and rotating jointly with said first and second shafts, and said switch-actuating portion of said switch-actuating device being movable relative to said shafts to actuate said switch means to switch off said first and second motors when the angular displacement of said first and second shafts differs by a predetermined extent.
Claim 3
Dependent Claim
23 words
Apparatus according to claim 1, wherein the said switch-actuating device is mounted with freedom to slide axially relative to one of said shafts.
Claim 4
Dependent Claim
34 words
Apparatus according to claim 2, wherein the said switch-actuating device includes means defining a threaded bore, and wherein the other of said shafts is provided with a threaded portion engaged in said threaded bore.
Claim 5
Dependent Claim
17 words
Apparatus according to claim 1, wherein the two said elements comprise the respective rolls of a calender.
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |