Metal treatment – Process of modifying or maintaining internal physical... – Producing or treating layered – bonded – welded – or...
Reexamination Certificate
2005-05-03
2005-05-03
La Villa, Michael (Department: 1775)
Metal treatment
Process of modifying or maintaining internal physical...
Producing or treating layered, bonded, welded, or...
C148S519000, C148S527000, C148S529000, C148S579000, C148S590000, C148S592000, C029S888060
Reexamination Certificate
active
06887322
ABSTRACT:
High pressure cylinders comprising backing steel cylinders and tool steel liners are disclosed. An annealed tool steel liner is inserted into the backing steel cylinder, followed by heat treating to harden the tool steel liner. The tool steel liner may be provided as a single continuous tube, thereby avoiding problems associated with segmented liners. The high-pressure cylinders are suitable for use as plastic and rubber extruders injection molding cylinders and the like.
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WEXCO Tool Steel Cylinders, website download (two pages), visited Jun. 2004.*
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Lundeen Calvin D.
Smith Donald W.
La Villa Michael
Pietragallo Bosick & Gordon
Towner, Esq. Alan G.
Wexco Corporation
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