US2732589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
steadmam
Assignee: —
•
Filing: —
•
Granted: 1956-01-31
•
Expires: 1973-01-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:08
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/0601; B29D30/0606; B29C; B29C33/00; B29C33/42; B29D2030/0607; B29D2030/0613
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
108 words
APPARATUS FOR MOLDING RUBBER VEHICLE TIRES COMPRISING, A MOLD MEMBER HAVING A CAVITY THEREIN FOR RECEIVING AN UNCURED TIRE, AN INWARDLY EXTENDING CIRCUMFERENTIAL RIB ON THE TREAD FORMING WALL OF THE CAVITY, CORE MEMBERS SECURED TO SAID RIB AND EXTENDING TRANSVERSELY OUTWARDLY FROM SAID RIB AT A POINT SPACED FROM SAID TREAD FORMING WALL, AT LEAST A PORTION OF THE SPACE BETWEEN SAID OUTWARDLY EXTENDING CORE MEMBERS AND SAID TREAD FORMING WALL BEING UNOBSTRUCTED, WHEREBY WHEN THE TREAD STOCK OF SAID UNCURED TIRE IS CAUSED TO FLOW UNDER HEAT AND PRESSURE, PORTIONS THEREOF WILL FLOW AROUND SAID CORE MEMBERS AND REUNITE IN SAID UNOBSTRUCTED SPACE TO FORM SLITS.
Claim 2
Dependent Claim
108 words
APPARATUS FOR MOLDING RUBBER VEHICLE TIRES COMPRISING, A MOLD MEMBER HAVING A CAVITY THEREIN FOR RECEIVING AN UNCURED TIRE, AN INWARDLY EXTENDING CIRCUMFERENTIAL RIB ON THE TREAD FORMING WALL OF THE CAVITY, CORE MEMBERS SECURED TO SAID RIB AND EXTENDING TRANSVERSELY OUTWARDLY FROM SAID RIB AT A POINT SPACED FROM SAID TREAD FORMING WALL, AT LEAST A PORTION OF THE SPACE BETWEEN SAID OUTWARDLY EXTENDING CORE MEMBERS AND SAID TREAD FORMING WALL BEING UNOBSTRUCTED, WHEREBY WHEN THE TREAD STOCK OF SAID UNCURED TIRE IS CAUSED TO FLOW UNDER HEAT AND PRESSURE, PORTIONS THEREOF WILL FLOW AROUND SAID CORE MEMBERS AND REUNITE IN SAID UNOBSTRUCTED SPACE TO FORM SLITS.
Claim 3
Independent Claim
124 words
A METHOD OF MOLDING SLITS IN THE TREAD OF A RUBBER VEHICLE TIRE COMPRISING, COATING THE TREAD OF AN UNCURED TIRE WITH AN ADHESION PREVENTING SUBSTANCE, PLACING SAID TIRE IN A CURING MOLD HAVING CORE SECTIONS SUPPORTED IN THE CAVITY OF SAID MOLD SPACED FROM THE TREAD FORMING WALL THEREOF, PORTIONS OF SAID SPACE BETWEN SAID CORE SECTIONS AND SAID TREAD FORMING SURFACE BEING UNOBSTRUCTED, CURING SAID TIRE UNDER HEAT AND PRESSURE WHEREBY PORTIONS OF THE RUBBER WILL FLOW ON EITHER SIDE OF SAID CORE SECTIONS AND CONTACT IN SAID UNOBSTRUCTED SPACE WITHOUT ADHESION BECAUSE OF THE PRESENCE OF THE ADHESION PREVENTING SUBSTANCE AND THEREBY FORM SLITS IN THE SURFACE OF THE TIRE TREAD AND REMOVING SAID TIRE FROM SAID CURING MOLD AFTER CURING.
Claim 4
Independent Claim
124 words
A METHOD OF MOLDING SLITS IN THE TREAD OF A RUBBER VEHICLE TIRE COMPRISING, COATING THE TREAD OF AN UNCURED TIRE WITH AN ADHESION PREVENTING SUBSTANCE, PLACING SAID TIRE IN A CURING MOLD HAVING CORE SECTIONS SUPPORTED IN THE CAVITY OF SAID MOLD SPACED FROM THE TREAD FORMING WALL THEREOF, PORTIONS OF SAID SPACE BETWEN SAID CORE SECTIONS AND SAID TREAD FORMING SURFACE BEING UNOBSTRUCTED, CURING SAID TIRE UNDER HEAT AND PRESSURE WHEREBY PORTIONS OF THE RUBBER WILL FLOW ON EITHER SIDE OF SAID CORE SECTIONS AND CONTACT IN SAID UNOBSTRUCTED SPACE WITHOUT ADHESION BECAUSE OF THE PRESENCE OF THE ADHESION PREVENTING SUBSTANCE AND THEREBY FORM SLITS IN THE SURFACE OF THE TIRE TREAD AND REMOVING SAID TIRE FROM SAID CURING MOLD AFTER CURING.
References Cited (Backward Citations)
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US1604451A
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US1604452A
Cited
US1880430A
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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) | 1959-01-30 | 1959-08-01 | 1960-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-30 | 1963-08-01 | 1964-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-30 | 1967-08-01 | 1968-01-31 | $7700.00 | Window Closed / Lapsed |