US4185065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing tire segments
Assignee: Bayer AG
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Filing: 1977-12-08
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Granted: 1980-01-22
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Expires: 1997-12-08
Abstract
Abstract This invention relates to a process for the manufacture of a tire in segments in a closed mold wherein the internal surface of the mold determines the shape of the external surface of the tire segments, comprising: (a) radially moving from the center of a mold towards the internal surface of the mold a molding tool which determines the shape of the internal surface of the tire segments while leaving a space between said molding tool and said internal surface of said mold, said space conforming to the shape of said tire segments; (b) filling said space between said molding tool and said internal surface with a plastic compound; and when said plastic compound is solidified, (c) moving said mold or said molding tool in the circumferential direction so that the next segment follows immediately upon the segment already produced.
Inventors
- 👤 Ulrich Knipp
- 👤 Paul Vente
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:57
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
146 words
A process for the manufacture of a tire in segments in a closed mold wherein the internal surface of the mold determines the external surface of the tire segments, comprising: (a) radially moving from the center of a mold towards the internal surface of the mold a molding tool which determines the shape of the internal surface of the tire segments while leaving a space between said molding tool and said internal surface of said mold, said space conforming to the shape of said tire segments; (b) filling said space between said molding tool and said internal surface with a plastic compound, and when said plastic compound is solidified; (c) moving said mold or said molding tool in the circumferential direction so that the next segment follows immediately upon the segment already produced; and (d) repeating steps (a), (b), and (c) until the tire is formed.
Claim 2
Dependent Claim
146 words
A process for the manufacture of a tire in segments in a closed mold wherein the internal surface of the mold determines the external surface of the tire segments, comprising: (a) radially moving from the center of a mold towards the internal surface of the mold a molding tool which determines the shape of the internal surface of the tire segments while leaving a space between said molding tool and said internal surface of said mold, said space conforming to the shape of said tire segments; (b) filling said space between said molding tool and said internal surface with a plastic compound, and when said plastic compound is solidified; (c) moving said mold or said molding tool in the circumferential direction so that the next segment follows immediately upon the segment already produced; and (d) repeating steps (a), (b), and (c) until the tire is formed.
Claim 3
Dependent Claim
48 words
The process of claim 1, within said mold with said space between said molding tool and said internal surface is limited perpendicularly to the plane of the tire by placing and displacing bulkheads in the radial direction, so as to limit the segments produced in the circumferential direction.
Claim 4
Dependent Claim
20 words
The process of claim 1, characterized in that a tread surface is placed on said internal surface of the mold.
Claim 5
Dependent Claim
19 words
The process of claim 1, characterized in that reinforcing elements are placed on said internal surface of the mold.
Claim 6
Dependent Claim
23 words
The process of claim 1, characterized in that said plastic compound is a polyurethane reaction mixture which is introduced through a mixing head.
Claim 7
Dependent Claim
23 words
The process of claim 5, characterized in that said plastic compound is a thermoplastic polyurethane elastomer which is introduced through an extrusion head.
References Cited (Backward Citations)
US2710425A
Cited
US3836612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-21 | 1983-07-23 | 1984-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-21 | 1987-07-23 | 1988-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-21 | 1991-07-23 | 1992-01-22 | $7700.00 | Window Closed / Lapsed |