US3838734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer roll body
Assignee: Beloit Corp
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Filing: 1973-01-22
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Granted: 1974-10-01
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Expires: 1993-01-22
Abstract
Abstract A temperature controlled roll mechanism such as in a supercalender for a paper machine with a first roll having an outer covering of composition having an upper temperature limit and a second opposed heated roll, and the first roll being maintained within its permissible temperature range by having an inner shell coaxially within an outer shell defining a thin annular coolant chamber with passages through the shell and coolant supplied from the space within the inner shell and coolant exhausted through a passage connected only at one end of the annular chamber.
Inventors
- 👤 J Kilmartin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:53
CPC Classifications
D; D21; D21G; D21G1/00; D21G1/02; D21G1/0253; D21G1/0266; D06; D06C; D06C15/00; D06C15/08; F; F16; F16C; F16C13/00; F28; F28F; F28F5/00; F28F5/02; F16C2340/00; Y; Y10; Y10S; Y10S165/00; Y10S165/135; Y10S165/139; Y10S165/156; Y10S165/159; Y10S165/16
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
166 words
A temperature controlled roll mechanism for a paper machine or the like comprising in combination: a first roll having a roll shell with an inner rigid metal annular base and a covering of a composition having an upper temperature limiT; a second opposing heated roll forming a roll couple with the first roll and being heated to heat the outer layer of said first roll; end journals for the first roll for supporting the roll for rotation; an inner shell positioned coaxially within the outer shell and defining a thin annular chamber therebetween and forming a hollow fluid receiving inner chamber within the inner shell; a plurality of axially spaced openings through said inner shell leading from said inner chamber to said annular chamber; a coolant delivery mechanism connected to said inner chamber; and a coolant exhaust passage connected to one end of said annular chamber receiving flow from said axially spaced openings so that fluid flows axially through the annular chamber to said exhaust passage.
Claim 2
Dependent Claim
166 words
A temperature controlled roll mechanism for a paper machine or the like comprising in combination: a first roll having a roll shell with an inner rigid metal annular base and a covering of a composition having an upper temperature limiT; a second opposing heated roll forming a roll couple with the first roll and being heated to heat the outer layer of said first roll; end journals for the first roll for supporting the roll for rotation; an inner shell positioned coaxially within the outer shell and defining a thin annular chamber therebetween and forming a hollow fluid receiving inner chamber within the inner shell; a plurality of axially spaced openings through said inner shell leading from said inner chamber to said annular chamber; a coolant delivery mechanism connected to said inner chamber; and a coolant exhaust passage connected to one end of said annular chamber receiving flow from said axially spaced openings so that fluid flows axially through the annular chamber to said exhaust passage.
Claim 3
Dependent Claim
55 words
A temperature controlled roll mechanism for a paper machine or the like constructed in accordance with claim 1: wherein said openings are constructed so that a greater volume of flow passes from the inner chamber to the annular chamber at the end remote from said exhaust passage than at the end adjacent said exhaust passage.
Claim 4
Dependent Claim
43 words
A temperature controlled roll mechanism for a paper machine or the like constructed in accordance with claim 1: wherein said openings are larger at the end of said inner shell remote from the exhaust passage than at the end adjacent said exhaust passage.
Claim 5
Dependent Claim
44 words
A temperature controlled roll mechanism for a paper machine or the like constructed in accordance with claim 1: including a pressure relief valve in said exhaust passage maintaining coolant within the annular chamber and preventing gravity drainage of the coolant from said annular chamber.
Claim 6
Dependent Claim
39 words
A temperature controlled roll mechanism for a paper machine or the like constructed in accordance with claim 1: wherein said coolant delivery mechanism includes an axial flow passage into said inner shell coaxially arranged with said coolant exhaust passage.
Claim 7
Dependent Claim
34 words
A temperature controlled roll mechanism for a paper machine or the like constructed in accordance with claim 1: wherein said journals are supported on circular disks positioned in each end of said roll shell.
Claim 8
Dependent Claim
122 words
A temperature controlled roll mechanism for a paper machine or the like comprising in combination: an outer roll shell subjected to an external heat transfer environment; end journal members for rotatably supporting said roll; an inner shell within the roll shell having an inner chamber and forming a thin annular chamber within the outer roll shell; a plurality of axially spaced openings through the inner roll shell for the flow of heat exchange fluid from said inner chamber to said annular chamber; means for delivering said fluid to the inner chamber of said inner shell; and a fluid exhaust passage leading from one end of said annular chamber so that the fluid flows axially in the annular chamber to said one end.
Claim 9
Dependent Claim
122 words
A temperature controlled roll mechanism for a paper machine or the like comprising in combination: an outer roll shell subjected to an external heat transfer environment; end journal members for rotatably supporting said roll; an inner shell within the roll shell having an inner chamber and forming a thin annular chamber within the outer roll shell; a plurality of axially spaced openings through the inner roll shell for the flow of heat exchange fluid from said inner chamber to said annular chamber; means for delivering said fluid to the inner chamber of said inner shell; and a fluid exhaust passage leading from one end of said annular chamber so that the fluid flows axially in the annular chamber to said one end.
Claim 10
Dependent Claim
50 words
A temperature controlled roll mechanism for a paper machine or the like constructed in accordance with claim 7: wherein said openings are constructed for a greater volume of flow into said annular chamber at the end of the inner shell remote from the exhaust passage than adjacent the exhaust passage.
Claim 11
Dependent Claim
41 words
A temperature controlled roll mechanism for a paper machine or the like constructed in accordance with claim 7: wherein said journal members have circular disks mounted within said outer roll shell with said exhaust passages being within one of said disks.
Claim 12
Dependent Claim
34 words
A temperature controlled roll mechanism for a paper machine or the like constructed in accordance with claim 1: wherein said annular chamber has a radial dimension in the range of one-eighth to one-quarter inch.
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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |