US4131063A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calender
Assignee: Wartsila Oy AB
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Filing: 1977-10-13
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Granted: 1978-12-26
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Expires: 1997-10-13
Abstract
Abstract A calender comprising a plurality of superimposed hard rolls and a number of soft rolls arranged to load laterally a plurality of these hard rolls. The soft rolls are arranged in pairs formed by two soft rolls opposite each other at both sides of the same hard roll. The distance between the axes of the hard rolls located between a pair of soft rolls is greater than the sum of the radii of these hard rolls.
Inventors
- 👤 Jukka Joutsjoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:27
CPC Classifications
D; D21; D21G; D21G1/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
82 words
A calender being defined by a plurality of superimposed hard rolls and a number of soft rolls arranged to laterally load at least two of said hard rolls, said soft rolls being arranged in pairs formed by two soft rolls opposite each other at both sides of the same hard roll, those of said rolls which are located between a pair of soft rolls being arranged so that the distance between their axes is greater than the sum of their respective radii.
Claim 2
Dependent Claim
82 words
A calender being defined by a plurality of superimposed hard rolls and a number of soft rolls arranged to laterally load at least two of said hard rolls, said soft rolls being arranged in pairs formed by two soft rolls opposite each other at both sides of the same hard roll, those of said rolls which are located between a pair of soft rolls being arranged so that the distance between their axes is greater than the sum of their respective radii.
Claim 3
Dependent Claim
48 words
A calender as claimed in claim 1, wherein: said superimposed hard rolls form a roll stack including, between those of said hard rolls which are located between a pair of soft rolls, at least one other hard roll, forming a roll nip together with an adjacent hard roll.
Claim 4
Dependent Claim
50 words
A calender as claimed in claim 2, wherein: the axes of at least one of said pairs of soft rolls being arranged in a plane substantially at right angles to a plane through the axes of the hard roll between said pair of soft rolls and an adjacent hard roll.
Claim 5
Dependent Claim
20 words
A calender as claimed in claim 1, wherein said hard rolls form a plurality of separate roll nip including units.
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) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |