US3695808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making tires
Assignee: Bridgestone Firestone Inc
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Filing: 1970-04-27
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Granted: 1972-10-03
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Expires: 1990-04-27
Abstract
Abstract An apparatus for making tires which include a separable mold which has an inner surface which defines the outer shape of a tire to be formed. A generally flat paddle shaped template member extends generally radially within the mold when it is assembled and the cross sectional shape of the tire is determined by the space between the template and the inner surface of the mold. The mold is rotated about its axis while the template member is preferably held in a fixed position. A flowable and hardenable elastomeric material suitable for use in constructing tires (such as polyurethane) is introduced into the rotating mold and centrifugal force urges the flowable material to the inner surface of the mold and when sufficient elastomeric material has been added, the wiping action of the template member on the elastomeric material forms the inner shape of the tire. The material hardens and the mold, the template member and finished tire are separated. The template member is preferably held in a fixed position, however, it may be rotated at a slower speed than the mold or in a reverse direction.
Inventors
- 👤 Heinz Wilhelm Beneze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:56
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/0679; B29C; B29C41/00; B29C41/02; B29C41/04; B29C41/042; B29C41/047
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
165 words
Apparatus for molding tires including in combination a mold having an inner surface and comprising first And second axially spaced side members connected at their outer peripheries by a ring member, means mounting said mold for rotation about its axis with said axis being disposed generally in a horizontal plane, means for rotating said mold about its horizontal axis wall means defining an opening to the interior of said mold for introducing flowable and hardenable material suitable for use in constructing tires thereinto, at least one template member positioned within said mold and extending therein in a generally radial direction, said template member comprising a plate member having an outer perimetric surface which conforms to the inner cross sectional shape of the tire to be molded and having a relatively small thickness dimension in the circumferential direction of the mold, the shape of the tire being determined by the space between the perimetric surface of said template member and said inner surface of said mold.
Claim 2
Dependent Claim
165 words
Apparatus for molding tires including in combination a mold having an inner surface and comprising first And second axially spaced side members connected at their outer peripheries by a ring member, means mounting said mold for rotation about its axis with said axis being disposed generally in a horizontal plane, means for rotating said mold about its horizontal axis wall means defining an opening to the interior of said mold for introducing flowable and hardenable material suitable for use in constructing tires thereinto, at least one template member positioned within said mold and extending therein in a generally radial direction, said template member comprising a plate member having an outer perimetric surface which conforms to the inner cross sectional shape of the tire to be molded and having a relatively small thickness dimension in the circumferential direction of the mold, the shape of the tire being determined by the space between the perimetric surface of said template member and said inner surface of said mold.
Claim 3
Dependent Claim
27 words
Apparatus for molding tires as claimed in claim 1, wherein means are provided for fixedly locating said template member within said mold during rotation of the mold.
Claim 4
Dependent Claim
21 words
Apparatus for molding tires as claimed in claim 1, wherein means are provided for rotating said template relative to said mold.
Claim 5
Dependent Claim
35 words
Apparatus for molding tires as claimed in claim 1, wherein means are provided for supporting said template member which permits said template member to be rotated about its generally radical direction length axis when desired.
Claim 6
Dependent Claim
139 words
Apparatus for molding tires including in combination a mold having an inner surface which defines the outer shape of a tire, means mounting said mold for rotation about its axis, means for rotating said mold about its axis, wall means defining an opening to the interior of said mold for introducing flowable and hardenable elastomeric material thereinto, at least one template member positioned within said mold and extending therein in a generally radial direction, said template member comprising a plate member having an outer perimetric surface which conforms to the inner cross sectional shape of the tire to be molded and having a relatively small thickness dimension in the circumferential direction of the mold, the shape of the tire being determined by the space between said perimetric surface of said template member and said inner surface of said mold.
Claim 7
Dependent Claim
139 words
Apparatus for molding tires including in combination a mold having an inner surface which defines the outer shape of a tire, means mounting said mold for rotation about its axis, means for rotating said mold about its axis, wall means defining an opening to the interior of said mold for introducing flowable and hardenable elastomeric material thereinto, at least one template member positioned within said mold and extending therein in a generally radial direction, said template member comprising a plate member having an outer perimetric surface which conforms to the inner cross sectional shape of the tire to be molded and having a relatively small thickness dimension in the circumferential direction of the mold, the shape of the tire being determined by the space between said perimetric surface of said template member and said inner surface of said mold.
Claim 8
Dependent Claim
27 words
Apparatus for molding tires as claimed in claim 5, wherein means are provided for fixedly locating said template member within said mold during rotation of the same.
Claim 9
Dependent Claim
22 words
Apparatus for molding tires as claimed in claim 5, wherein means are provided for rotating said template member relative to said mold.
Claim 10
Dependent Claim
35 words
Apparatus for molding tires as claimed in claim 5, wherein means are provided for supporting said template member which permits said template member to be rotated about its generally radial direction length axis when desired.
Claim 11
Dependent Claim
47 words
Apparatus for molding tires as claimed in claim 5, wherein said mold has a circumferentially extending opening thereinto having a width dimension in the axial direction of said mold, the thickness dimension of said plate member being less than said width dimension of said circumferentially extending opening.
Claim 12
Dependent Claim
47 words
Apparatus for molding tires as claimed in claim 1, wherein said mold has a circumferentially extending opening thereinto having a width dimension in the axial direction of said mold, the thickness dimension of said plate member being less than said width dimension of said circumferentially extending opening.
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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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |