Splice bar for tire tread extrusion apparatus

Details Splice bar for tire tread extrusion apparatus Splice bar for tire tread extrusion apparatus

2008-10-13

2011-11-22

Gupta, Yogendra (Department: 1744)

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

Extrusion shaping means

C425S19200R, C425S462000

Reexamination Certificate

active

08062017

ABSTRACT:
A splice bar for a tire tread die designed for providing a narrow strip of electrically conductive rubber extending from a lower under tread to the surface of the outer tread by positioning a slotted chimney block in a the outer tread rubber passage and having a passage between the chimney slot and the under tread rubber passage specially shaped for improving the flow of rubber during extrusion. This passage is essentially straight for guiding a strip-shaped stream of rubber of the under tread to the chimney slot. The passage intersects the rear surface of the splice bar to form a generally rectangular shaped corridor extending from the rear surface to the chimney slot.

REFERENCES:
patent: 6294119 (2001-09-01), Nakamura
patent: 6495081 (2002-12-01), Benatti
patent: 6746227 (2004-06-01), Helle et al.
patent: 6834693 (2004-12-01), Calvar et al.
patent: 6951233 (2005-10-01), Calvar et al.
patent: 6994817 (2006-02-01), Calvar et al.
patent: 2002/0157747 (2002-10-01), Shimada et al.

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