Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Reexamination Certificate
2008-03-25
2008-03-25
Hewitt, James M. (Department: 3679)
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
C264S267000, C264S318000, C425S127000, C425SDIG047, C425SDIG058
Reexamination Certificate
active
07347962
ABSTRACT:
Apparatus for manufacturing a socket end (12) which is provided with a sealing ring (9). The apparatus comprises an outer mould (1) for forming the outer contour of the sealing ring (9) and for forming the outer side of the socket end (12), and a core for forming the inner side of the socket end (12) and the sealing ring (9). The core comprises a first core part (7a), a sleeve-like core part (7) which can be displaced on the first core part (7a), for forming a front for the sealing ring (9), a core part (8) which adjoins the first core part (7a) and can be contracted in the radial direction, for forming the inner contour of the sealing ring (9), and a second core part (6), which adjoins the contractable core part (8), for forming the inner side of the pipe part. The contractable core part (8) has a radially innermost position with an external diameter which is smaller than the internal diameter of the sleeve -like core part (7).
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International Search Report dated Nov. 6, 2001.
Blank Rome LLP
Hewitt James M.
Wavin B.V.
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