US3840958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calender rolls
Assignee: HERMAN MASCHINENBAU GmbH
•
Filing: 1973-08-07
•
Granted: 1974-10-15
•
Expires: 1993-08-07
Abstract
Abstract A calender roll for calendering material such as rubber, plastics or textile material to form a film web wherein, to compensate for deflection in operation of the roll in a calender due to pressure of material being worked in the roll-gap of the calender, the roll is of one-piece construction and has end portions of a length at each end of the roll equal to at least one-fifth of the length of the roll, so formed as to present an annular recess in each end face of the roll or so formed as to present a plurality of bores in each end face of the roll.
Inventors
- 👤 H Mahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:38
CPC Classifications
F; F16; F16C; F16C13/00; F16C13/02; F16C13/022; F16C13/024; B; B29; B29C; B29C33/00; B29C33/02; B29C33/04; B29C33/044; B29C43/00; B29C43/22; B29C43/24; B29C43/32; B29C43/44; B29C43/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A calender roll for calendering material to form a film web, said roll being of one-piece construction and formed with annular recesses at each end thereof thereby forming tubular overhanging portions, said recesses being equal to at least one-fifth of the length of the roll, ring means inserted at the outer ends only of said recesses for controlling the deflection of said tubular overhanging portions, the outside dimension of said ring means relative to the inside surface of said recesses being such to provide a clearance therebetween when said roll is in an unloaded condition, a liquid substance having heat-conducting properties filling each of said annular recesses, and seal means disposed outwardly of said ring means for sealing off each annular recess.
Claim 2
Dependent Claim
122 words
A calender roll for calendering material to form a film web, said roll being of one-piece construction and formed with annular recesses at each end thereof thereby forming tubular overhanging portions, said recesses being equal to at least one-fifth of the length of the roll, ring means inserted at the outer ends only of said recesses for controlling the deflection of said tubular overhanging portions, the outside dimension of said ring means relative to the inside surface of said recesses being such to provide a clearance therebetween when said roll is in an unloaded condition, a liquid substance having heat-conducting properties filling each of said annular recesses, and seal means disposed outwardly of said ring means for sealing off each annular recess.
References Cited (Backward Citations)
US216964A
Cited
US242058A
Cited
US271605A
Cited
US2187250A
Cited
US3336648A
Cited
US3522643A
Cited
US3750246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |