US3601968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically heated, unilaterally supported drawroll having cooling means
Assignee: Maschinenfabrik Rieter AG
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Filing: 1969-12-08
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Granted: 1971-08-31
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Expires: 1989-12-08
Abstract
Abstract A drawroll is disclosed for use with a drawtwisting or drawwinding machine or the like, supported upon one end of a rotating shaft which is rotatably mounted at its other end in a suitable bearing, and having electrical heating means within the drawroll. The heating means is rigidly secured to the machine frame by a hollow supporting tube surrounding the shaft; a fan means is disposed within the tube to draw cooling air along the shaft and expel it through radial openings adjacent the heating means. A hood may be provided externally of the supporting tube to enclose the space extending axially from the machine frame to the heating means.
Inventors
- 👤 Armin Wirz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:24
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/14; H05B6/145; D; D02; D02J; D02J13/00; D02J13/005
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
111 words
In combination, an electrically heated, unilaterally supported drawroll for drawtwisting, draw-winding, or spin-drawwinding machines or the like, a shaft rigidly secured to said drawroll and rotatably supported within a bearing housing secured to the machine frame and axially spaced from said drawroll, a heating device within the interior of said drawroll and concentric with the axis of rotation of said drawroll, said heating device being rigidly secured to the machine frame adjacent said bearing housing, a cooling zone defined between said heating device and said bearing housing, and a fan rotor means within said cooling zone adapted to draw cooling air through said cooling zone and expel the cooling air radially.
Claim 2
Dependent Claim
111 words
In combination, an electrically heated, unilaterally supported drawroll for drawtwisting, draw-winding, or spin-drawwinding machines or the like, a shaft rigidly secured to said drawroll and rotatably supported within a bearing housing secured to the machine frame and axially spaced from said drawroll, a heating device within the interior of said drawroll and concentric with the axis of rotation of said drawroll, said heating device being rigidly secured to the machine frame adjacent said bearing housing, a cooling zone defined between said heating device and said bearing housing, and a fan rotor means within said cooling zone adapted to draw cooling air through said cooling zone and expel the cooling air radially.
Claim 3
Dependent Claim
50 words
The combination as defined in claim 1, further comprising a supporting tube securing said heating device to the machine frame, said fan rotor means drawing the cooling air through said supporting tube along said shaft, said supporting tube having a plurality of openings through which the air is expelled radially.
Claim 4
Dependent Claim
36 words
The combination as defined in claim 2, further comprising a flange member securing said supporting tube to the machine frame, said flange member being spaced from the machine frame to permit entry of cooling air therebetween.
Claim 5
Dependent Claim
43 words
The combination as defined in claim 3, further comprising a hood member extending axially from said flange member and substantially surrounding said supporting tube between said flange member and said drawroll, thereby defining an enclosed space between the machine frame and said drawroll.
Claim 6
Dependent Claim
23 words
The combination as defined in claim 4, wherein said hood member comprises a plurality of openings through which the cooling air is exhausted.
Claim 7
Dependent Claim
24 words
The combination as defined in claim 2, wherein said openings in said supporting tube lie substantially in the radial plane of said rotor means.
Claim 8
Dependent Claim
16 words
The combination as defined in claim 6, wherein said openings are disposed adjacent said heating device.
Claim 9
Dependent Claim
29 words
The combination as defined in claim 1, wherein said rotor means comprises a heat-conductive material and is provided with a plurality of radially extending recesses in the surface thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |