Expansion tube having expansion slits and apparatus for...

Details Expansion tube having expansion slits and apparatus for... Expansion tube having expansion slits and apparatus for...

2007-04-24

2007-04-24

Mackey, James P. (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Rod or tubular preform

C425S384000, C425S387100, C425S403100

Reexamination Certificate

active

10807690

ABSTRACT:
The present invention relates to an expansion tube that has a plurality of expansion slits on the outer peripheral surface thereof long a longitudinal direction, each of the expansion slits having a predetermined width and a relatively larger length than the predetermined width, and an apparatus for manufacturing a heat shrinkable tube, having the expansion tube, that can regularly and fast expand the heat shrinkable tube, and after the expansion, regularly and fast cool the heat shrinkable tube by the cooling water sprayed through the slits, thereby rapidly and stably manufacturing the heat shrinkable.

REFERENCES:
patent: 3990828 (1976-11-01), Reifenhauser
patent: 4419304 (1983-12-01), Ficke et al.
patent: 4441694 (1984-04-01), Currant et al.
patent: 4896904 (1990-01-01), Gadsden et al.
patent: 5071886 (1991-12-01), Aoshima et al.
patent: 5287894 (1994-02-01), Shukushima et al.
patent: 5516270 (1996-05-01), Lehtinen
patent: 6162383 (2000-12-01), Hane et al.
patent: 6863856 (2005-03-01), Mahoney et al.

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