US3701873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inductively heated godet
Assignee: Oerlikon Barmag AG
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Filing: 1970-09-17
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Granted: 1972-10-31
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Expires: 1990-09-17
Abstract
Abstract A godet assembly in which a rotated, inductively heated cylindrical godet shell is provided on its inner wall with radially recessed openings from which there extends an axially recessed opening, preferably triangular in a longitudinal section, a non-magnetic material of high electrical conductivity such as copper being advantageously filled into these recessed openings in close adherent contact with the wall surfaces of the openings, such that the openings and preferably with the embedded non-magnetic material are arranged radially and axially to maintain a uniform temperature on the outer circumferential surface of the shell.
Inventors
- 👤 Karl Bauer
- 👤 Gerhard Martens
- 👤 Herbert Schiminski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:54
CPC Classifications
D; D02; D02J; D02J13/00; D02J13/005; D02J1/00; D02J1/22; D02J1/224; H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/14; H05B6/145
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
217 words
In a godet assembly having a rotatable, cylindrical, inductively-heatable shell enclosing a stationary core of a ferromagnetic material wound with an induction coil with means to supply an alternating current to said coil for heating said shell, the improvement which comprises: a core having a U-shaped cross-section defined by a base member extending along the axis of the godet and oppositely disposed radial legs extending outwardly toward the terminal zone at either end of said shell; and a plurality of annular rings composed of a non-magnetizable material of high electrical conductivity embedded in the inner wall of said cylindrical shell in radially recessed portions thereof extending around the entire circumference of the shell, including a pair of such rings adjacent said terminal zones, at least one of said pair of annular rings being profiled to provide an axial projection therefrom of smaller radial thickness extending into the adjacent terminal zone of said shell with the terminal zone being disposed radially oppositely of its corresponding core leg, said projection also being embedded in a correspondingly axially recessed extension of said radially recessed portion of said shell, each of said annular rings being so disposed axially and radially of the shell as to maintain the outer circumferential surface of said shell at a substantially uniform temperature while being heated.
Claim 2
Dependent Claim
217 words
In a godet assembly having a rotatable, cylindrical, inductively-heatable shell enclosing a stationary core of a ferromagnetic material wound with an induction coil with means to supply an alternating current to said coil for heating said shell, the improvement which comprises: a core having a U-shaped cross-section defined by a base member extending along the axis of the godet and oppositely disposed radial legs extending outwardly toward the terminal zone at either end of said shell; and a plurality of annular rings composed of a non-magnetizable material of high electrical conductivity embedded in the inner wall of said cylindrical shell in radially recessed portions thereof extending around the entire circumference of the shell, including a pair of such rings adjacent said terminal zones, at least one of said pair of annular rings being profiled to provide an axial projection therefrom of smaller radial thickness extending into the adjacent terminal zone of said shell with the terminal zone being disposed radially oppositely of its corresponding core leg, said projection also being embedded in a correspondingly axially recessed extension of said radially recessed portion of said shell, each of said annular rings being so disposed axially and radially of the shell as to maintain the outer circumferential surface of said shell at a substantially uniform temperature while being heated.
Claim 3
Dependent Claim
28 words
A godet assembly as claimed in claim 1 wherein said annular rings are composed of a material selected from the class consisting of copper, copper alloys and aluminum.
Claim 4
Dependent Claim
52 words
A godet assembly as claimed in claim 1 wherein said projection of said annular ring has a substantially triangular cross-section as taken on a section longitudinally of said shell, the radial thickness of the projection reducing gradually up to an apex located in the terminal zone of one end of said shell.
Claim 5
Dependent Claim
52 words
A godet assembly as claimed in claim 1 wherein the projections of each annular ring have a substantially triangular cross-section as taken on a section longitudinally of the shell, the radial thickness of the projection reducing gradually up to an apex located in said terminal zone at either end of said shell.
Claim 6
Dependent Claim
31 words
A godet assembly as claimed in claim 1 wherein said annular rings are in intimate adherent contact with the inner walls of said radially and axially recessed portions of said shell.
Claim 7
Dependent Claim
185 words
In a godet assembly having a rotatable, cylindrical, inductively-heatable shell enclosing a stationary core of a ferromagnetic material wound with an induction coil with means to supply an alternating current to said coil for heating said shell, the improvement which comprises: a core having a U-shaped cross-section defined by a base member extending along the axis of the godet and oppositely disposed radial legs extending outwardly toward the terminal zone at either end of said shell; and a shell whose inner wall contains a plurality of radially recessed openings extending around the entire circumference of the shell, including a pair of such recessed openings adjacent said terminal zones, and an axially recessed opening of smaller radial dimension extending from one side of at least one of said pair of radially recessed openings into the adjacent terminal zone of said shell with the terminal zone being disposed radially oppositely of its corresponding core leg, each of said recessed openings being so disposed axially and radially of the shell as to maintain the outer circumferential surface of said shell at a substantially uniform temperature while being heated.
Claim 8
Dependent Claim
185 words
In a godet assembly having a rotatable, cylindrical, inductively-heatable shell enclosing a stationary core of a ferromagnetic material wound with an induction coil with means to supply an alternating current to said coil for heating said shell, the improvement which comprises: a core having a U-shaped cross-section defined by a base member extending along the axis of the godet and oppositely disposed radial legs extending outwardly toward the terminal zone at either end of said shell; and a shell whose inner wall contains a plurality of radially recessed openings extending around the entire circumference of the shell, including a pair of such recessed openings adjacent said terminal zones, and an axially recessed opening of smaller radial dimension extending from one side of at least one of said pair of radially recessed openings into the adjacent terminal zone of said shell with the terminal zone being disposed radially oppositely of its corresponding core leg, each of said recessed openings being so disposed axially and radially of the shell as to maintain the outer circumferential surface of said shell at a substantially uniform temperature while being heated.
Claim 9
Dependent Claim
63 words
A godet assembly as claimed in claim 6, wherein the axially recessed openings extending from each radialLy recessed opening have a substantially triangular cross-section as taken on a section longitudinally of the shell, the radial gap across said axially recessed opening reducing gradually from said radially recessed opening outwardly to an apex located in said terminal zone at either end of said shell.
Claim 10
Dependent Claim
37 words
A godet assembly as claimed in claim 1 wherein said non-magnetizable material is a metal integrally formed and embedded in said radially recessed portion and said axially recessed extension of said shell by the powder spray process.
Claim 11
Dependent Claim
36 words
A godet assembly as claimed in claim 1 wherein said non-magnetizable material is a metal integrally formed and embedded in said radially recessed portion and said axially recessed extension of said shell by the sintering process.
References Cited (Backward Citations)
US3412228A
Cited
GB1172586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |