US4033288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for coating magnetic disks
Assignee: BASF SE
•
Filing: 1976-07-26
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Granted: 1977-07-05
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Expires: 1996-07-26
Abstract
Abstract A disk to be coated on both sides in rotatively supported within an annular housing of a larger internal diameter. Means traverse and coat each side of the rotating disk. The inner housing wall is disposed transversely to the disk and has an annular slot operatively associated with the disk whereby excess coating material is spun off the disk and into the housing. The housing is radially of a triangular cross-section, the apex offset from said disk whereby said spun off material strikes an inclined internal wall surface of the housing. Means orbit a plurality of such disks about a central axis and through a plurality of movable treating stations.
Inventors
- 👤 Josef Woellhaf
- 👤 Werner Balz
- 👤 Roland Falk
- 👤 Dieter Scheffel
- 👤 Volker Richter
- 👤 Paul Willmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:22
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/84; G11B5/842; B; B05; B05C; B05C11/00; B05C11/02; B05C11/08; B05D; B05D1/00; B05D1/002; B05D1/005
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
226 words
An apparatus for coating both sides of a disk with magnetic material comprising: a rotatable support means whereon said disk is supported in an inclined generally vertical position; an annular housing which is radially of a generally triangular cross-section and having an inner diameter which is larger than said disk; means to traverse a pair of opposed coating material projecting nozzles from an inner part of said disk outwardly past the extent of the disk at a lower section thereof whereby to apply coating material to each side of the disk; means to rotate said support at speeds whereby said coating material is subjected to centrifugal forces to distribute the applied material uniformly over said sides and excess applied material is spun off; the inner wall of said housing being disposed generally transversely to the plane of said disk, having a generally centrally disposed annular slot aligned with and effectively wider than said disk, whereby to receive said spun off material, and being configurated so as to direct and retain said coating material from returning through said slot; the plane through the apex of the remaining walls of said housing being offset from the plane of said disk whereby said spun off material received through said slot strikes an inclined internal wall surface of said housing; and said apparatus including means to dry the coated substrate.
Claim 2
Independent Claim
226 words
An apparatus for coating both sides of a disk with magnetic material comprising: a rotatable support means whereon said disk is supported in an inclined generally vertical position; an annular housing which is radially of a generally triangular cross-section and having an inner diameter which is larger than said disk; means to traverse a pair of opposed coating material projecting nozzles from an inner part of said disk outwardly past the extent of the disk at a lower section thereof whereby to apply coating material to each side of the disk; means to rotate said support at speeds whereby said coating material is subjected to centrifugal forces to distribute the applied material uniformly over said sides and excess applied material is spun off; the inner wall of said housing being disposed generally transversely to the plane of said disk, having a generally centrally disposed annular slot aligned with and effectively wider than said disk, whereby to receive said spun off material, and being configurated so as to direct and retain said coating material from returning through said slot; the plane through the apex of the remaining walls of said housing being offset from the plane of said disk whereby said spun off material received through said slot strikes an inclined internal wall surface of said housing; and said apparatus including means to dry the coated substrate.
Claim 3
Dependent Claim
24 words
An apparatus as claimed in claim 1 wherein said supported disk is at an angle of from 10° to 30° to the vertical plane.
Claim 4
Dependent Claim
43 words
An apparatus as claimed in claim 1 wherein said means to dry comprises spaced heater means movably mounted and adapted to be moved on said mounting between a non-operative position and a functional position straddling said coated disk at an upper section thereof.
Claim 5
Dependent Claim
30 words
An apparatus as claimed in claim 1 wherein said housing has a pair of opposed vertical slots in the lower part thereof operatively associated with said pair of traversing nozzles.
Claim 6
Dependent Claim
95 words
An apparatus as in claim 1 wherein said disk support extends radially from a rotatable turret; means are provided to rotate said turret; said means to dry are spaced from said nozzles and operatively located along the orbital path traversed by said disk; said annular housing and dryer means are movably supported by means adapted to selectively withdraw said housing and dryer means from the path of said orbiting disk and to selectively return said housing and dryer mean to an operative position with respect to a disk indexed along said path by said turret.
Claim 7
Dependent Claim
45 words
An apparatus as in claim 5 wherein a plurality of said disk supports extend radially from said turret for indexing along said path and a plurality of movable treating stations are operatively disposed along said path whereby a plurality of disks may be simultaneously treated.
Claim 8
Dependent Claim
19 words
An apparatus as in claim 6 wherein at least one of said treating stations is a disk cleaning station.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |