SE300693BSE3641/60ASE364160ASE300693BSE 300693 BSE300693 BSE 300693BSE 3641/60 ASE3641/60 ASE 3641/60ASE 364160 ASE364160 ASE 364160ASE 300693 BSE300693 BSE 300693B
Authority
SE
Sweden
Application number
SE3641/60A
Inventor
D Giletta
A Pacciarini
Original Assignee
Pirelli
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by PirellifiledCriticalPirelli
Publication of SE300693BpublicationCriticalpatent/SE300693B/xx
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
B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
B29D30/24—Drums
B29D30/244—Drums for manufacturing substantially cylindrical tyre components with cores or beads, e.g. carcasses
B29D30/246—Drums for the multiple stage building process, i.e. the building-up of the cylindrical carcass is realised on one drum and the toroidal expansion is realised after transferring on another drum
B29D30/247—Arrangements for the first stage only, e.g. means for radially expanding the drum to lock the beads