Gasket and mandrel assembly for pipe joints

A gasket and mandrel assembly, comprising:

• a gasket, comprising:
• an annular main body portion having a longitudinal axis;
• an anchor flange extending radially outwardly from said main body portion;
• a pipe sealing portion extending from said main body portion said pipe sealing portion positioned in a folded condition in which said pipe sealing portion is disposed at least partially within said main body portion;
• and
• a pair of mandrels respectively fitted to opposite sides of said gasket at least one of said mandrels having an annular outer surface disposed at an angle of between 1.5° and 4° with respect to said longitudinal axis of said gasket, said mandrels cooperating with one another to substantially enclose at least a portion of said gasket with said anchor flange exposed externally of said mandrels.

A gasket and mandrel assembly, comprising:

• a gasket, comprising:
• an annular main body portion having a longitudinal axis;
• an anchor flange extending radially outwardly from said main body portion;
• a pipe sealing portion extending from said main body portion, said pipe sealing portion positioned in a folded condition in which said pipe sealing portion is disposed at least partially within said main body portion;
• and
• a pair of mandrels respectively fitted to opposite sides of said gasket at least one of said mandrels having an annular outer surface disposed at an angle of between 0° and 7° with respect to said longitudinal axis of said gasket, said mandrels cooperating with one another to substantially enclose at least a portion of said gasket with said anchor flange exposed externally of said mandrels, wherein said anchor flange comprises at least one undercut, at least a portion of one of said mandrels received within said undercut.

A mandrel assembly for use in casting a gasket within a curved wall of a structure, comprising:

• a first annular mandrel having a longitudinal axis, an outer wall, an inner wall spaced radially inwardly from said outer wall, and a front wall connecting said outer and inner walls, said front wall having a convex profile with respect to said longitudinal axis;
• and
• a second annular mandrel having a longitudinal axis, an outer wall, an inner wall spaced radially inwardly from said outer wall, and a rear wall connecting said outer and inner walls, said rear wall having a concave profile with respect to said longitudinal axis;
• at least one of the outer walls of said first and second mandrels oriented at an angle of between 0° and 7° with respect to said longitudinal axis.

A gasket and mandrel assembly, comprising:

• a gasket, comprising:
• an annular main body portion having a longitudinal axis;
• an anchor flange extending radially outwardly from said main body portion;
• a pipe sealing portion extending from said main body portion, said pipe sealing portion positionable in a folded condition in which said pipe sealing portion is disposed at least partially within said main body portion;
• and
• a mandrel assembly, comprising:
• a first mandrel having a body with an annular outer surface disposed at an angle of between 0.5° and 7° with respect to said longitudinal axis of said gasket;
• and
• a second mandrel having an annular body, said first and second mandrels cooperating with one another to substantially enclose at least a portion of said gasket with said anchor flange exposed externally of said mandrels.