GB1252431A - - Google Patents
Info
- Publication number
- GB1252431A GB1252431A GB1252431DA GB1252431A GB 1252431 A GB1252431 A GB 1252431A GB 1252431D A GB1252431D A GB 1252431DA GB 1252431 A GB1252431 A GB 1252431A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tyre
- elements
- concave surface
- radially
- faces
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tyre Moulding (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
1,252,431. Pneumatic tyres. DUNLOP HOLDINGS Ltd. 30 Dec., 1968 [3 Jan., 1968], No. 404/68. Heading B7C. A method of building a pneumatic tyre comprises forming a plurality of tread elements 1 of unvulcanized rubber composition, each element having two end faces 6 and a concave surface and a convex surface, the convex surface being of substantially the same configuration as it will have in the finished moulded tyre, applying the elements around the radially-outer surface of a treadless tyre in circumferential end-to-end arrangement with the concave surface of each element in contact with said radially-outer surface and with the end faces of each element each touching an end face of an adjacent element to provide a complete tread, and moulding and vulcanizing the complete tyre. The concave surface has grooves and has a slightly-larger radius of curvature than that of said radiallyouter surface to prevent trapping of air. To assemble, the tyre is held in an indexing machine, and the elements are applied thereto individually by a jig holding an element by suction. Each element may include two traction lugs 2, and faces 6 may be inclined to form grooves 7. Specification 1,205,951 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB40468 | 1968-01-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1252431A true GB1252431A (en) | 1971-11-03 |
Family
ID=9703790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1252431D Expired GB1252431A (en) | 1968-01-03 | 1968-01-03 |
Country Status (6)
| Country | Link |
|---|---|
| BR (1) | BR6905333D0 (en) |
| DE (1) | DE1900291A1 (en) |
| ES (1) | ES362074A1 (en) |
| FR (1) | FR1600682A (en) |
| GB (1) | GB1252431A (en) |
| NL (1) | NL6900131A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140137997A1 (en) * | 2011-07-14 | 2014-05-22 | Compagnie Generale Des Etablissements Michelin | Method and tire for improved uniformity and endurance of aggressive tread designs |
| US9656436B2 (en) | 2011-07-14 | 2017-05-23 | Compagnie Generale Des Etablissements Michelin | Method and tire for improved uniformity and endurance of aggressive tread designs |
-
1968
- 1968-01-03 GB GB1252431D patent/GB1252431A/en not_active Expired
- 1968-12-31 FR FR1600682D patent/FR1600682A/fr not_active Expired
-
1969
- 1969-01-02 ES ES362074A patent/ES362074A1/en not_active Expired
- 1969-01-03 DE DE19691900291 patent/DE1900291A1/en active Pending
- 1969-01-03 BR BR20533369A patent/BR6905333D0/en unknown
- 1969-01-03 NL NL6900131A patent/NL6900131A/xx unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140137997A1 (en) * | 2011-07-14 | 2014-05-22 | Compagnie Generale Des Etablissements Michelin | Method and tire for improved uniformity and endurance of aggressive tread designs |
| US9656436B2 (en) | 2011-07-14 | 2017-05-23 | Compagnie Generale Des Etablissements Michelin | Method and tire for improved uniformity and endurance of aggressive tread designs |
Also Published As
| Publication number | Publication date |
|---|---|
| NL6900131A (en) | 1969-07-07 |
| BR6905333D0 (en) | 1973-03-13 |
| FR1600682A (en) | 1970-07-27 |
| ES362074A1 (en) | 1970-11-01 |
| DE1900291A1 (en) | 1969-09-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |