US3989430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire mold having nails inserted in the vents
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1976-02-12
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Granted: 1976-11-02
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Expires: 1996-02-12
Abstract
Abstract Nails are inserted into the vents of tire molds. The nails prevent rubber protrusion from forming in the vents during molding.
Inventors
- 👤 Charles R. Dailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:47
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/10; B29D; B29D30/00; B29D30/06; B29D30/0601; B29D30/0606; B29D2030/0607; B29D2030/0617; B29L; B29L2030/00; Y; Y10; Y10S; Y10S425/00; Y10S425/812
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
115 words
A tire mold for imparting a tread design into the surface of a tire while the tire is being cured, said tire mold having vents for the purpose of releasing air which would otherwise be trapped as the uncured rubber is forced into the tread design section of the mold, the improvement which comprises a nail having a head and a shank inserted within at least some of the mold vents, the head of each nail being inside the mold cavity and the shank of the nail extending into the vent, and each nail being secured into place so that each shank is movable along the length of the vent from zero to 0.125 mm.
Claim 2
Dependent Claim
115 words
A tire mold for imparting a tread design into the surface of a tire while the tire is being cured, said tire mold having vents for the purpose of releasing air which would otherwise be trapped as the uncured rubber is forced into the tread design section of the mold, the improvement which comprises a nail having a head and a shank inserted within at least some of the mold vents, the head of each nail being inside the mold cavity and the shank of the nail extending into the vent, and each nail being secured into place so that each shank is movable along the length of the vent from zero to 0.125 mm.
Claim 3
Dependent Claim
18 words
The mold of claim 1 wherein the nails are held in place by a bend in the shank.
Claim 4
Dependent Claim
22 words
The mold of claim 2 wherein the nails are held in place by a bend in the shank at the mold exterior.
Claim 5
Dependent Claim
28 words
The mold of claim 2 wherein the nails are held in place by a bend in the shank at the area of the nail positioned within the vent.
Claim 6
Dependent Claim
25 words
The mold of claim 1 wherein the nail contains a protrusion under the nail head which holds the nail away from the interior mold surface.
Claim 7
Dependent Claim
16 words
The mold of claim 5 wherein the protrusion is from 0.025 to 0.125 mm in height.
References Cited (Backward Citations)
US2524737A
Cited
US3151374A
Cited
FR1394552A
Cited
US3344477A
Cited
US3377662A
Cited
US3374983A
Cited
US3804566A
Cited
US3854852A
Cited
US3891363A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |