Patent US4090901A successfully refreshed from Google Patents.
US4090901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recapping method
Assignee: Individual
•
Filing: 1977-05-31
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Granted: 1978-05-23
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Expires: 1997-05-31
Abstract
Abstract This invention relates to a method of recapping tires. The tire to be recapped is placed within an envelope with the recap thereabout. A hose runs from inside the envelope to outside the tank in which the tire is placed. Hot water is pumped into the air-tight tank. The rising air and water pressure force the air out of the envelope and press the envelope firmly against the recapped tire to hold the recap securely in place. As water leaks in the envelope cause rejects, the present method advances the art by allowing for an early detection of leaks in the envelope. As well, the usual methods remove the air from the envelope by creating a vacuum in the tank. This method uses the simpler process of creating a higher pressure in the tank to force the air out of the envelope.
Inventors
- 👤 Guenter Adolf Baatz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:01
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/52; B29D30/54; B29D30/56; B29C; B29C35/00; B29C35/02; B29C35/0227; B29C35/0233; B29D2030/545; B29D30/58; B29D2030/582; B29L; B29L2030/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
160 words
An improved method of recapping rubber tires using hot water to cure a tread onto a prepared tire comprising the steps of: (a) enclosing a tread covered tire in an air-tight flexible envelope, (b) placing the enclosed tires into a sealed container, (c) introducing a small amount of water into the container to increase the air pressure in the container sufficiently to force the air out of the envelopes via vent means leading from the interior of the envelope to the atmosphere to press the envelope against the tread to hold it securedly against the tire, (d) after the air is expelled from the envelope, introducing more water into the kettle to cover the tire in water at a predetermined temperature and pressure, (e) maintaining the water in the container under the predetermined temperature and pressure for a predetermined time until the tire is cured, and (f) removing the water from the container and the cured tire from the envelope.
Claim 2
Dependent Claim
160 words
An improved method of recapping rubber tires using hot water to cure a tread onto a prepared tire comprising the steps of: (a) enclosing a tread covered tire in an air-tight flexible envelope, (b) placing the enclosed tires into a sealed container, (c) introducing a small amount of water into the container to increase the air pressure in the container sufficiently to force the air out of the envelopes via vent means leading from the interior of the envelope to the atmosphere to press the envelope against the tread to hold it securedly against the tire, (d) after the air is expelled from the envelope, introducing more water into the kettle to cover the tire in water at a predetermined temperature and pressure, (e) maintaining the water in the container under the predetermined temperature and pressure for a predetermined time until the tire is cured, and (f) removing the water from the container and the cured tire from the envelope.
Claim 3
Dependent Claim
27 words
A method as claimed in claim 1 wherein the pressure in the container after step (c) is about 15 psi and after step (d) about 80 psi.
Claim 4
Dependent Claim
27 words
A method as claimed in claim 2 wherein the pressure in the container is kept at about 80 psi for about 4 hours for regular automobile tires.
Claim 5
Dependent Claim
19 words
A method as claimed in claim 3 wherein the temperature of the water during curing is about 200°-210° F.
Claim 6
Dependent Claim
23 words
A method as claimed in claim 4 wherein the water in the container is kept well circulated to ensure an even heat distribution.
Claim 7
Dependent Claim
15 words
A method as claimed in claim 1 wherein the tires are hung in the kettle.
Claim 8
Dependent Claim
58 words
A method as claimed in claim 6 wherein a hollow tube overhangs from the lower inner recess of the hanging tire, in which the water collects, into the bottom of the kettle to self-siphon the water out of the lower portion of the hanging tire when the water level in the kettle is dropped below the tire level.
References Cited (Backward Citations)
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Cited
US3325326A
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US3672009A
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US3925128A
Cited
US3769121A
Cited
US3969179A
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US3884739A
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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) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |