Patent US3868203A successfully refreshed from Google Patents.
US3868203A
Expired / Lapsed
US
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Tire molding machine
Assignee: NRM Corp
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Filing: 1973-12-26
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Granted: 1975-02-25
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Expires: 1993-12-26
Abstract
Abstract A tire molding machine comprising a core or center mechanism adapted to be expanded radially and converted from a generally cylindrical to a toroidal or tire shape, side wall mold sections and a tread mold section movable into position vis-a-vis such core when in tire shape to form a tire mold cavity, injection means to fill such cavity with an elastomer to be heat cured to form a tire, such core being then collapsed to cylindrical shape and radially contracted while the side wall and tread mold sections are withdrawn to permit removal of the tire.
Inventors
- 👤 Leonard G Turk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:47
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/0601; B29D30/0645
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
196 words
A tire making machine comprising a cylindrical core, side wall mold sections movable axially of said core, said core projecting axially in cantilever fashion from one of said side wall mold sections and being separable from the other of said side wall mold sections to permit the placement of tire components over said core, each side wall mold section including toe rings projecting axially inwardly thereof adapted to support tire components such as bead rings, means operative to expand said core radially from a diameter less than that of said toe rings to a diameter greater than that of said toe rings while maintaining its cylindrical shape to form a shoulder on the ends of said drum adapted to cooperate with said toe rings to retain such bead rings thereon, means operative to convert said core from such cylindrical shape to tire shape to form the interior of a tire cavity when said side wall mold sections have moved axially thereagainst, an elastic yet substantially rigid surface on said core in both the cylindrical and tire shape thereof, and injection means operative to fill the cavity remaining after placement of such components with an elastomeric material.
Claim 2
Dependent Claim
196 words
A tire making machine comprising a cylindrical core, side wall mold sections movable axially of said core, said core projecting axially in cantilever fashion from one of said side wall mold sections and being separable from the other of said side wall mold sections to permit the placement of tire components over said core, each side wall mold section including toe rings projecting axially inwardly thereof adapted to support tire components such as bead rings, means operative to expand said core radially from a diameter less than that of said toe rings to a diameter greater than that of said toe rings while maintaining its cylindrical shape to form a shoulder on the ends of said drum adapted to cooperate with said toe rings to retain such bead rings thereon, means operative to convert said core from such cylindrical shape to tire shape to form the interior of a tire cavity when said side wall mold sections have moved axially thereagainst, an elastic yet substantially rigid surface on said core in both the cylindrical and tire shape thereof, and injection means operative to fill the cavity remaining after placement of such components with an elastomeric material.
Claim 3
Dependent Claim
46 words
A machine as set forth in claim 1 including a radially movable tread mold section mounted on one side wall mold section, and means operative radially to move said tread mold section when said side wall mold sections are in position to complete such tire cavity.
Claim 4
Dependent Claim
40 words
A machine as set forth in claim 2 including axially inclined guide means interconnecting said tread mold section and the side wall mold section on which it is mounted operative to cause such radial movement of said tread mold section.
Claim 5
Dependent Claim
32 words
A machine as set forth in claim 1 including clamp cylinders operative to hold said side wall mold sections in proper position vis-a-vis said core when the latter is in tire shape.
Claim 6
Dependent Claim
21 words
A machine as set forth in claim 1 including means to apply heat to such cavity to cure a tire therein.
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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) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |