US4596523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calendar or roll assembly
Assignee: Individual
•
Filing: 1985-07-01
•
Granted: 1986-06-24
•
Expires: 2005-07-01
Abstract
Abstract A calendar assembly for making a substantially uniform thickness web in large widths with rolls having adjustable axis. The upper roll has an axis adjustable in a plane which is parallel to but offset from a plane in which the lower roll is adjustable. The axis of a third or intermediate roll in the stack is transversely adjustable between the upper and lower rolls.
Inventors
- 👤 Fred Whitehead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:26
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/22; B29C43/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
A calender or roll assembly for production of a film or sheet of substantially uniform thickness comprising a stack of at least three rolls, namely a central roll disposed between a first roll and a second roll so as to provide respective nips between the first roll and the central roll and between the central roll and the second roll, wherein the axis of the first roll is adjustable transversely of its length in a first plane and the axis of the second roll is adjustable transversely of its length in a second plane which is substantially parallel to but offset from the first plane, and wherein the axis of the central roll is transversely adjustable between the first plane and the second plane.
Claim 2
Dependent Claim
124 words
A calender or roll assembly for production of a film or sheet of substantially uniform thickness comprising a stack of at least three rolls, namely a central roll disposed between a first roll and a second roll so as to provide respective nips between the first roll and the central roll and between the central roll and the second roll, wherein the axis of the first roll is adjustable transversely of its length in a first plane and the axis of the second roll is adjustable transversely of its length in a second plane which is substantially parallel to but offset from the first plane, and wherein the axis of the central roll is transversely adjustable between the first plane and the second plane.
Claim 3
Dependent Claim
24 words
A calender or roll assembly as claimed in claim 1 wherein the central roll is smaller in diameter than the first and second rolls.
Claim 4
Dependent Claim
142 words
A calender or roll assembly for production of a film or sheet of substantially uniform thickness comprising a stack of at least three rolls, namely a central roll disposed between an upper roll and lower roll so as to provide respective nips between the upper roll and the central roll and between the central roll and the lower roll, wherein the axis of the upper roll is adjustable transversely of its length in a first imaginary vertical plane and the axis of the lower roll is adjustable transversely of its length in a second imaginary vertical plane which is offset from the first plane, and wherein the central roll is transversely adjustable between a first limiting position in which its axis lies on the first vertical plane and a second limiting position in which its axis lies on the second vertical plane.
Claim 5
Dependent Claim
142 words
A calender or roll assembly for production of a film or sheet of substantially uniform thickness comprising a stack of at least three rolls, namely a central roll disposed between an upper roll and lower roll so as to provide respective nips between the upper roll and the central roll and between the central roll and the lower roll, wherein the axis of the upper roll is adjustable transversely of its length in a first imaginary vertical plane and the axis of the lower roll is adjustable transversely of its length in a second imaginary vertical plane which is offset from the first plane, and wherein the central roll is transversely adjustable between a first limiting position in which its axis lies on the first vertical plane and a second limiting position in which its axis lies on the second vertical plane.
Claim 6
Dependent Claim
24 words
A calender or roll assembly as claimed in claim 3 wherein the central roll is smaller in diameter than the upper and lower rolls.
Claim 7
Dependent Claim
19 words
A calender or roll assembly as claimed in any preceding claim wherein one of the three rolls is crowned.
References Cited (Backward Citations)
US2732591A
Cited
US2611150A
Cited
US2575590A
Cited
US2897538A
Cited
US3129457A
Cited
US3060843A
Cited
US3273199A
Cited
US3274308A
Cited
US3871808A
Cited
US3679344A
Cited
US4038012A
Cited
US4117054A
Cited
US4124349A
Cited
US4171942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-23 | 1989-12-23 | 1990-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-23 | 1993-12-23 | 1994-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-23 | 1997-12-23 | 1998-06-24 | $7700.00 | Window Closed / Lapsed |