US3633540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotatable fixture with positive retention and lifting means
Assignee: Alcoa Corp
•
Filing: 1970-01-23
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Granted: 1972-01-11
•
Expires: 1990-01-23
Abstract
Abstract A fixture for positively centering and holding an article in a coating process in which the interior and exterior surfaces of the articles are simultaneously coated while the article is rotated by the fixture. Further, the fixture includes means for lifting the article to allow its easy removal from the fixture. In addition, a structure is provided for masking the inner lip or rim of a pan cover or lid when applying a porcelain coating to the exterior surface of the lid.
Inventors
- 👤 Alfred V Bolt
- 👤 James S Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:49
CPC Classifications
C; C23; C23D; C23D5/00; B; B05; B05B; B05B12/00; B05B12/16; B05B12/20; B05B13/00; B05B13/02; B05B13/0221; B05B13/0228; B05B13/06; B05B13/0645; Y; Y10; Y10T; Y10T279/00; Y10T279/34; Y10T279/3481
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
139 words
A structure for supporting a shell in a process in which the structure rotates the shell, said shell having an inwardly directed flange and a rim portion depending therefrom, said supporting structure comprising a vertically disposed spindle mounted for rotation about its vertical axis, a plurality of arms rigidly attached to said spindle, and radiating outwardly therefrom, a cylindrical mask disposed on said arms, and having an upper edge for engaging the shell flange outside the area of its depending rim portion so that the depending portion is inwardly disposed of said mask, means on said arms retaining said mask, means mechanically associated with said spindle for vertically lifting the cover independently of the mask, and means fixed to said spindle to effect rotation of same, and thus rotation of the arms as well as the cover and mask.
Claim 2
Dependent Claim
139 words
A structure for supporting a shell in a process in which the structure rotates the shell, said shell having an inwardly directed flange and a rim portion depending therefrom, said supporting structure comprising a vertically disposed spindle mounted for rotation about its vertical axis, a plurality of arms rigidly attached to said spindle, and radiating outwardly therefrom, a cylindrical mask disposed on said arms, and having an upper edge for engaging the shell flange outside the area of its depending rim portion so that the depending portion is inwardly disposed of said mask, means on said arms retaining said mask, means mechanically associated with said spindle for vertically lifting the cover independently of the mask, and means fixed to said spindle to effect rotation of same, and thus rotation of the arms as well as the cover and mask.
Claim 3
Dependent Claim
36 words
The structure of claim 3 in which the shell has a centrally located opening, and the center post has a pointed end portion for extending through said opening when the shell is disposed on the mask.
Claim 4
Dependent Claim
62 words
The structure of claim 1 in which the spindle is a tubular structure having a center bore, the means for lifting the shell including a center post slidably mounted within said bore, and having means adjacent the upper end of said post for engaging and lifting the shell from the arms when the post is lifted a predetermined distance within the bore.
Claim 5
Dependent Claim
41 words
The structure of claim 3 in which the means for engaging and lifting the shell include arm means attached to the center post, and extending outwardly therefrom, each of said arms having a pointed end portion extending in an upward direction.
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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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |