US3750246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite roll
Assignee: Gulf and Western Systems Co
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Filing: 1971-09-13
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Granted: 1973-08-07
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Expires: 1991-09-13
Abstract
Abstract A composite roll for controlled deflection in calendering operations or the like to achieve an even nip includes an inner core member and a sleeve member received over the core member. At the central portion of the roll, both the core member and the sleeve are substantially cylindrical and tightly fitting together. On opposite sides of the central portion of the roll, either the outer peripheral surface of the core member, or the inner peripheral surface of the sleeve member, diverges from the other peripheral surface to form a space which varies in crosssectional area proceeding from the central portion toward the opposite end portions of the roll. These annular spaces are filled with elastomeric material to achieve a substantially uniform spring rate along the entire length of the composite roll. The tightly fitting peripheral surfaces at the central portion of the roll maintain concentricity of the outer shell and prevent it from taking on a permanent eccentricity with respect to the core member.
Inventors
- 👤 D Pessen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:24
CPC Classifications
F; F16; F16C; F16C13/00; F16C13/02; F16C13/022; F16C13/024; D; D06; D06B; D06B23/00; D06B23/02; D06B23/021; F16C2340/00
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
154 words
A composite roll comprising: a substantially rigid elongated core member having an outer peripheral surface defining a first surface, a substantially rigid elongated outer shell positioned over said core member and having an inner peripheral surface defining a second surface, said core member and shell having a substantially common longitudinal axis, said roll having a central portion and opposite end portions, at least one of said first and second surfaces diverging from the other of said surfaces along said longitudinal axis from said centraL portion of said roll to said opposite end portions thereof to define an annular space between said core member and shell, elastomeric material filling said annular space, said elastomeric material having substantially uniformly distributed air bubles therein, and substantially rigid end disc means for substantially closing said annular space at said opposite end portions of said roll to substantially prevent expansion of said elastomeric material out said opposite end portions.
Claim 2
Dependent Claim
154 words
A composite roll comprising: a substantially rigid elongated core member having an outer peripheral surface defining a first surface, a substantially rigid elongated outer shell positioned over said core member and having an inner peripheral surface defining a second surface, said core member and shell having a substantially common longitudinal axis, said roll having a central portion and opposite end portions, at least one of said first and second surfaces diverging from the other of said surfaces along said longitudinal axis from said centraL portion of said roll to said opposite end portions thereof to define an annular space between said core member and shell, elastomeric material filling said annular space, said elastomeric material having substantially uniformly distributed air bubles therein, and substantially rigid end disc means for substantially closing said annular space at said opposite end portions of said roll to substantially prevent expansion of said elastomeric material out said opposite end portions.
Claim 3
Dependent Claim
44 words
The roll of claim 1 wherein said annular space has a predetermined area at said opposite end portions of said roll, said end disc means having a plurality of openings therethrough, said openings having an area around one-fourth as great as said predetermined area.
Claim 4
Dependent Claim
82 words
The roll of claim 1 wherein said end disc means include inner peripheral surfaces facing said outer peripheral surface of said core member to define a first pair of facing surfaces and outer peripheral surfaces facing said inner peripheral surface of said shell to define a second pair of facing surfaces, at least one of said pair of facing surfaces being radially spaced for allowing relative deflection between said core member and said shell at said outer end portions of said roll.
Claim 5
Dependent Claim
42 words
The roll of claim 1 wherein said inner peripheral surface of said shell and said outer peripheral surface of said core member are of substantially the same size and tightly fit relative to one another at said central portion of said roll.
Claim 6
Dependent Claim
38 words
The roll of claim 4 wherein at least one of said first and second surfaces includes passageway means therein at said central portion of said roll for interconnecting said annular space on opposite sides of said central portion.
Claim 7
Dependent Claim
29 words
The roll of claim 1 wherein said elastomeric material filling said annular space has a predetermined volume and said bubbles comprise from 10 to 20 percent of said volume.
Claim 8
Dependent Claim
35 words
The roll of claim 1 wherein said elastomeric material has a predetermined volume change under thermal stress during use of said roll and said bubbles are provided in sufficient quantity to accommodate said volume change.
Claim 9
Dependent Claim
128 words
A composite roll comprising; an inner core member having an outer peripheral surface defining a first surface, an outer shell positioned over said core member and having an inner peripheral surface defining a second surface, said core member and said shell having a substantially common longitudinal axis, said roll having a central portion and opposite end portions, at least one of said first and second surfaces diverging from the other of said first and second surfaces along said longitudinal axis from said central portion of said roll to said opposite end portions thereof to define a pair of elongated annular spaces, elastomeric material filling said spaces, and at least one of said first and second surfaces having circumferential grooves formed therein in the area of said annular spaces.
Claim 10
Dependent Claim
128 words
A composite roll comprising; an inner core member having an outer peripheral surface defining a first surface, an outer shell positioned over said core member and having an inner peripheral surface defining a second surface, said core member and said shell having a substantially common longitudinal axis, said roll having a central portion and opposite end portions, at least one of said first and second surfaces diverging from the other of said first and second surfaces along said longitudinal axis from said central portion of said roll to said opposite end portions thereof to define a pair of elongated annular spaces, elastomeric material filling said spaces, and at least one of said first and second surfaces having circumferential grooves formed therein in the area of said annular spaces.
Claim 11
Dependent Claim
30 words
The roll of claim 8 wherein said first and second surfaces are substantially the same size and tightly fitting relative to one another at said central portion of said roll.
Claim 12
Dependent Claim
174 words
A composite roll comprising; an inner core member having an outer peripheral surface defining a first surface, an outer shell positioned over said core member and having an inner peripheral surface defining a second surface, said core member and said shell having a substantially common longitudinal axis, said roll having a central portion and opposite end portions, said first and second surfaces being substantially the same size and tightly fitting relative to one another at said central portion of said roll, at least one of said first and second surfaces diverging from the other of said first and second surfaces along said longitudinal axis from said central portion of said roll to said opposite end portions thereof to define a pair of elongated annular spaces, elastomeric material filling said spaces, said first and second surfaces being cylindrical at said central portion of said roll, and at least onE of said first and second surfaces having passageway means formed therein at said central portion of said roll for interconnecting said pair of elongated annular spaces.
Claim 13
Dependent Claim
174 words
A composite roll comprising; an inner core member having an outer peripheral surface defining a first surface, an outer shell positioned over said core member and having an inner peripheral surface defining a second surface, said core member and said shell having a substantially common longitudinal axis, said roll having a central portion and opposite end portions, said first and second surfaces being substantially the same size and tightly fitting relative to one another at said central portion of said roll, at least one of said first and second surfaces diverging from the other of said first and second surfaces along said longitudinal axis from said central portion of said roll to said opposite end portions thereof to define a pair of elongated annular spaces, elastomeric material filling said spaces, said first and second surfaces being cylindrical at said central portion of said roll, and at least onE of said first and second surfaces having passageway means formed therein at said central portion of said roll for interconnecting said pair of elongated annular spaces.
Claim 14
Dependent Claim
158 words
A composite roll comprising; an inner core member having an outer peripheral surface defining a first surface, an outer shell positioned over said core member and having an inner peripheral surface defining a second surface, said core member and said shell having a substantially common longitudinal axis, said roll having a central portion and opposite end portions, said first and second surfaces being substantially the same size and tightly fitting relative to one another at said central portion of said roll, at least one of said first and second surfaces diverging from the other of said first and second surfaces along said longitudinal axis from said central portion of said roll to said opposite end portions thereof to define a pair of elongated annular spaces, elastomeric material filling said spaces, and passageway means formed therein for establishing communication with said pair of elongated annular spaces adjacent said central portion of said roll from locations exteriorly of said roll.
Claim 15
Dependent Claim
158 words
A composite roll comprising; an inner core member having an outer peripheral surface defining a first surface, an outer shell positioned over said core member and having an inner peripheral surface defining a second surface, said core member and said shell having a substantially common longitudinal axis, said roll having a central portion and opposite end portions, said first and second surfaces being substantially the same size and tightly fitting relative to one another at said central portion of said roll, at least one of said first and second surfaces diverging from the other of said first and second surfaces along said longitudinal axis from said central portion of said roll to said opposite end portions thereof to define a pair of elongated annular spaces, elastomeric material filling said spaces, and passageway means formed therein for establishing communication with said pair of elongated annular spaces adjacent said central portion of said roll from locations exteriorly of said roll.
Claim 16
Dependent Claim
64 words
The roll of claim 11 wherein said central portion of said roll has opposite terminations, said passageway means including at least one hole formed through said shell adjacent each of said terminations, a pair of circumferential grooves formed in said core member in alignment with said holes, and axially extending grooves formed in said core member extending from said grooves to said annular spaces.
Claim 17
Dependent Claim
132 words
A composite roll comprising; a substantially rigid elongated core member having an outer peripheral surface, a substantially rigid elongated outer shell positioned over said core member and having an inner peripheral surface spaced radially outward from said peripheral surface of said core member to define an elongated annular space having a predetermined volume, said roll having a central portion and opposite end portions, at least one of said surfaces diverging from the other of said surfaces from said central portion toward said opposite end portions, elastomeric material bonded to said peripheral surfaces and substantially filling said annular space, and said elastomeric material having substantially uniformly distributed gas bubbles therein occupying 10-20 percent of said predetermined volume for allowing said elastomeric material to expand and contract under mechanical and thermal stress without fracturing.
Claim 18
Dependent Claim
132 words
A composite roll comprising; a substantially rigid elongated core member having an outer peripheral surface, a substantially rigid elongated outer shell positioned over said core member and having an inner peripheral surface spaced radially outward from said peripheral surface of said core member to define an elongated annular space having a predetermined volume, said roll having a central portion and opposite end portions, at least one of said surfaces diverging from the other of said surfaces from said central portion toward said opposite end portions, elastomeric material bonded to said peripheral surfaces and substantially filling said annular space, and said elastomeric material having substantially uniformly distributed gas bubbles therein occupying 10-20 percent of said predetermined volume for allowing said elastomeric material to expand and contract under mechanical and thermal stress without fracturing.
Claim 19
Dependent Claim
17 words
The roll of claim 13 wherein said roll has a substantially constant spring rate throughout its length.
Claim 20
Dependent Claim
35 words
The roll of claim 13, and further including substantially rigid end closure means for substantially closing said annular space at said opposite end portions to prevent expansion of said elastomeric material out said end portions.
Claim 21
Dependent Claim
26 words
The roll of claim 13 wherein said peripheral surfaces are of substantially the same size and fit tightly relative to one another at said central portion.
Claim 22
Dependent Claim
39 words
The roll of claim 16 wherein said roll has a predetermined axial length, said peripheral surfaces of substantially the same size extending over not less than ten percent and not greater than 30 percent of said predetermined axial length.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |