Patent US3852860A successfully refreshed from Google Patents.
US3852860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bending compensated roll for a calender
Assignee: KraussMaffei Extrusion GmbH
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Filing: 1973-10-23
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Granted: 1974-12-10
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Expires: 1993-10-23
Abstract
Abstract A roll for a calender, which roll has compensation for bending forces which in operation will be applied between the ends of the roll by pressure of material in a roll gap between the roll and a further roll, said compensation being provided by forming the roll with a core and a shell with resilient means interposed between the core and the shell, the resilient means preferably comprising pieces of steel tubes all having the same outside diameter but inside diameters which reduce progressively from the ends of the roll towards the middle thereof.
Inventors
- 👤 J Tewes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:13
CPC Classifications
F; F16; F16C; F16C13/00; F16C13/02; F16C13/022; F16C13/024; B; B29; B29C; B29C43/00; B29C43/22
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
138 words
A roll for rolling out plastics material to form a web of sheeting in a calender, said roll comprising a core, an outer shell surrounding said core and spaced relative thereto, and resilient means interposed between said core and said shell at regular intervals around said core, said resilient means comprising pieces of resilient metal tubes longitudinally arranged and abutting in rows at regular intervals around said core, the internal diameter of the tubes in each row decreasing from the ends of said rolls toward the center of said roll, said metal tubes having a constant external diameter so as to provide linear support of said shell on said core, said rows of tubes thereby providing a spring force which increases from the ends toward the middle of said row commensurately with the bending characteristics of said core.
Claim 2
Dependent Claim
138 words
A roll for rolling out plastics material to form a web of sheeting in a calender, said roll comprising a core, an outer shell surrounding said core and spaced relative thereto, and resilient means interposed between said core and said shell at regular intervals around said core, said resilient means comprising pieces of resilient metal tubes longitudinally arranged and abutting in rows at regular intervals around said core, the internal diameter of the tubes in each row decreasing from the ends of said rolls toward the center of said roll, said metal tubes having a constant external diameter so as to provide linear support of said shell on said core, said rows of tubes thereby providing a spring force which increases from the ends toward the middle of said row commensurately with the bending characteristics of said core.
Claim 3
Dependent Claim
29 words
ThE roll of claim 1 wherein said core is formed with longitudinal grooves at spaced intervals around the outer periphery thereof, said tubes being positioned in said longitudinal grooves.
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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |