Title: Tire band building drum

Abstract: A tire band building drum for manufacturing a tire band of a carcass structure for a green tire, comprises a drive shaft adapted to be rotatable about a building drum axis and a collapsible drum portion axially covering a predetermined length from the forward end thereof. The collapsible drum portion includes a plurality of first arcuate drum segments circumferentially equi-distantly spaced apart from each other and a plurality of second arcuate drum segments each of which is interposed between the first arcuate drum segments to collectively define the collapsible drum portion surface in a substantially cylindrical form upon building the tire band thereon. The first arcuate drum segments are expanded while the second arcuate drum segments are contracted in inclined relation with the building drum axis for the purpose of facilitating withdrawal of a finished tire band out of the tire band building drum.

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Inventors: Yabe, Toshinori (Kodaira, JA)

Application Number: 621611
Filing Date: 1975-10-10
Publication_date: 1977-03-01
Assignee: Bridgestone Tire Company Limited (Tokyo, JA)
Primary Class(es): 156/420 156/126
Other Classes:
US Patent Ref:

2699198	Jan, 1955	Balzhiser	156/417.
2936813	May, 1960	Haase	156/126.
3027289	Mar, 1962	Gitzinger	156/126.
3542624	Nov, 1970	Nadler et al.	156/416.
3654025	Apr, 1972	Winzer et al.	156/415.
3837968	Sep, 1974	Marra	156/415.
3915788	Oct, 1975	Hirata et al.	156/414.

Other Refs: 1,237,3001,198,0541,209,733

Mar, 1967	DT
Aug, 1965	DT
Jan, 1966	DT

Primary Examiner: Van Horn, Charles E.
Assistant Examiner: Kittle, John E.
Attorney: Haseltine, Lake & Waters