US3556000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic calender
Assignee: EIDP Inc
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Filing: 1967-12-08
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Granted: 1971-01-19
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Expires: 1987-12-08
Abstract
Abstract A magnetic calender for sheet material incorporating a pair of ferromagnetic pressure applicators, at least one of which is a roll journaled for rotation about its longitudinal axis, defining between them a material-receiving nip, the applicators being mounted for free movement with respect to one another in a direction varying the opening of the nip, and paired magnetic means having pole faces of opposite polarity disposed symmetrically adjacent the peripheries of the pressure applicators in angularly offset locations from the nip developing components of force urging the pressure applicators towards one another.
Inventors
- 👤 Leslie Ethel Goodwin
- 👤 Jean Max Rowe
- 👤 Nathaniel Convers Wyeth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:58
CPC Classifications
D; D06; D06C; D06C15/00; D06C15/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
94 words
A magnetically-biased, pressure-applying apparatus for processing web-form materials comprising, in combination, a pair of roll-form ferromagnetic pressure applicators journaled for rotation about their longitudinal axes defining between them a material-receiving nip, said applicators being mounted for free movement with respect to one another in a direction varying the opening of said nip, and paired magnetic means having pole faces of opposite polarity disposed symmetrically with respect to said nip adjacent the peripheries of each of said ferromagnetic applicators in subdiametral angularly offset locations developing components of force urging said pressure applicators towards one another.
Claim 2
Dependent Claim
94 words
A magnetically-biased, pressure-applying apparatus for processing web-form materials comprising, in combination, a pair of roll-form ferromagnetic pressure applicators journaled for rotation about their longitudinal axes defining between them a material-receiving nip, said applicators being mounted for free movement with respect to one another in a direction varying the opening of said nip, and paired magnetic means having pole faces of opposite polarity disposed symmetrically with respect to said nip adjacent the peripheries of each of said ferromagnetic applicators in subdiametral angularly offset locations developing components of force urging said pressure applicators towards one another.
Claim 3
Dependent Claim
24 words
A magnetically-biased, pressure-applying apparatus for processing web-form materials according to claim 1 wherein said pole faces of said paired magnetic means constitute removable segments.
Claim 4
Dependent Claim
57 words
A magnetically-biased, pressure-applying apparatus for processing web-form materials according to claim 1 wherein said pole faces are formed longitudinally with a preselected contour on their surfaces in confrontation with the peripheries of said ferromagnetic pressure applicators, thereby maintaining a preselected flux gradient across the pole face-ferromagnetic Pressure applicator gap in a direction axial of said pressure applicators.
Claim 5
Dependent Claim
71 words
A magnetically-biased, pressure-applying apparatus for processing web-form materials according to claim 1 wherein an intermediate pressure-transmitting roll is interposed in the nip between said ferromagnetic pressure applicators with axis lying in the general plane of said nip and the axes of said pressure applicators, said intermediate roll being mounted for free movement with respect to said pressure applicators in the plane of said axes of said pressure applicators and said nip.
Claim 6
Dependent Claim
70 words
A magnetically-biased, pressure-applying apparatus for processing web-form materials according to claim 1 wherein a plurality of intermediate pressure-transmitting rolls are interposed in the nip between said ferromagnetic pressure applicators with axes lying in the general plane of said nip and the axes of said pressure applicators, said intermediate rolls being mounted for free movement with respect to said pressure applicators in the plane of said pressure applicators and said nip.
Claim 7
Dependent Claim
57 words
A magnetically-biased, pressure-applying apparatus for processing web-form materials according to claim 1 wherein a pair of intermediate pressure-transmitting rolls mounted for free movement with respect to said pressure pressure applicators are interposed in the nip between said pressure applicators with axes laterally offset one from another to thereby define, together with said pressure applicators, a web-receiving enclosure.
Claim 8
Dependent Claim
133 words
A magnetically-biased, pressure-applying apparatus for processing web-form materials comprising, in combination, a pair of ferromagnetic pressure applicators defining between them a material-receiving nip, one of said applicators being a roll journaled for rotation about its longitudinal axis and the other of said applicators being a planar ember adapted to reciprocatory displacement with respect to said roll in a plane generally tangent to said roll at the site of said nip, said applicators being mounted for free movement with respect to one another in a direction varying the opening of said nip, and paired magnetic means having pole faces of opposite polarity disposed symmetrically with respect to said nip adjacent the peripheries of each of said ferromagnetic applicators in subdiametral angularly offset locations developing components of force urging said pressure applicators towards one another.
Claim 9
Dependent Claim
133 words
A magnetically-biased, pressure-applying apparatus for processing web-form materials comprising, in combination, a pair of ferromagnetic pressure applicators defining between them a material-receiving nip, one of said applicators being a roll journaled for rotation about its longitudinal axis and the other of said applicators being a planar ember adapted to reciprocatory displacement with respect to said roll in a plane generally tangent to said roll at the site of said nip, said applicators being mounted for free movement with respect to one another in a direction varying the opening of said nip, and paired magnetic means having pole faces of opposite polarity disposed symmetrically with respect to said nip adjacent the peripheries of each of said ferromagnetic applicators in subdiametral angularly offset locations developing components of force urging said pressure applicators towards one another.
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |