US4238268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire building machine ply turn-down finger assembly
Assignee: Mccreary Tire and Rubber Co
•
Filing: 1979-02-07
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Granted: 1980-12-09
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Expires: 1999-02-07
Abstract
Abstract The ply turn-down fingers are mounted between an inner and outer ring. One ring being formed of an elastomer having mechanical properties of those of rubber and plastic. To remove a finger, the mounting screws nearest the fingers turn-down each side thereof and are removed. The elastomer ring is then bent or distorted away from the finger a distance to free its toe and the finger is withdrawn. A replacement finger is inserted in the same way. The operation can be carried out without freeing the adjacent fingers.
Inventors
- 👤 Robert S. McGaughey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:47
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/08; B29D30/20; B29D30/32; B29D2030/3221; B29D2030/3278; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/4984; Y10T29/49845; Y10T29/49863; Y10T29/4987; Y10T428/00; Y10T428/17
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
121 words
In a ply turn-down finger assembly for a tire building machine comprising an outer ring, an inner ring secured to the outer ring by a plurality of fasteners and a plurality of spring fingers, each having a shank end of toe thereon, positioned around the rings and clamped therebetween at their shank ends with toes turned under the inner ring, the improvement comprising at least one said ring being formed of an elastomer, whereby an individual spring finger is removed and replaced by loosening only the said fasteners adjacent said finger and deforming said elastomer ring in that region only sufficiently to release the shank and toe of that finger and to accept the shank and toe of a replacement finger.
Claim 2
Dependent Claim
121 words
In a ply turn-down finger assembly for a tire building machine comprising an outer ring, an inner ring secured to the outer ring by a plurality of fasteners and a plurality of spring fingers, each having a shank end of toe thereon, positioned around the rings and clamped therebetween at their shank ends with toes turned under the inner ring, the improvement comprising at least one said ring being formed of an elastomer, whereby an individual spring finger is removed and replaced by loosening only the said fasteners adjacent said finger and deforming said elastomer ring in that region only sufficiently to release the shank and toe of that finger and to accept the shank and toe of a replacement finger.
Claim 3
Dependent Claim
14 words
The assembly of claim 1 in which the elastomer ring is the inner ring.
Claim 4
Dependent Claim
13 words
The assembly of claim 1 in which the elastomer is a polyester elastomer.
Claim 5
Dependent Claim
18 words
The assembly of claim 1 in which the elastomer has mechanical properties intermediate those of rubbers and plastics.
Claim 6
Dependent Claim
27 words
The assembly of claim 4 in which the elastomer has a minimum Durometer A hardness of about 85 and a maximum Durometer D hardness of about 60.
References Cited (Backward Citations)
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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) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |