Head enclosing treatment hood

A head enclosing treatment hood, comprising:

• a hood affixed to a hood ring;
• a two piece neck ring affixed to said hood ring comprised of an upper neck ring having a plurality of downwardly extending hooks and a lower neck ring having a plurality of apertures through which said hooks extend and wherein said hooks lockingly engage said lower neck ring to fixedly join said upper neck ring and said lower neck ring together;
• at least one locking clip removably retained on said hood ring and retaining said neck ring to said hood ring;
• and
• a neck seal extending inwardly from said two piece neck ring wherein said neck seal is compressively disposed between said upper neck ring and said lower neck ring.

A head enclosing treatment hood, comprising:

• a hood affixed to a hood ring;
• a two piece neck ring retained under said hood ring having of an upper neck ring, said upper neck ring having a plurality of downwardly extending hooks, and a lower neck ring having a plurality of apertures through which said hooks extend;
• wherein said hooks engage said lower neck ring along a retaining bead circumscribing a lower side of said lower neck ring to fixedly join said upper neck ring and said lower neck ring together;
• a neck seal extending inwardly from said two piece neck ring wherein said neck seal is compressively disposed between said upper neck ring and said lower neck ring.

A head enclosing treatment hood, comprising:

• a hood affixed to a hood ring;
• a two piece neck ring sealingly combined with said hood ring having of an upper neck ring, said upper neck ring having a plurality of downwardly extending hooks, and a lower neck ring having a plurality of apertures through which said hooks extend;
• wherein said hood has a structural cage formed integrally within said hood;
• a neck seal extending inwardly from said two piece neck ring wherein said neck seal is compressively disposed between said upper neck ring and said lower neck ring.

A head enclosing treatment hood, comprising:

• a hood affixed to a hood ring;
• a two piece neck ring sealingly combined with said hood ring having of an upper neck ring, said upper neck ring having a plurality of downwardly extending hooks, and a lower neck ring having a plurality of apertures through which said hooks extend;
• said neck ring having a plurality of gas ports and at least one device port formed therein;
• a neck seal extending inwardly from said two piece neck ring wherein said neck seal is sealingly engaged compressively disposed between said upper neck ring and said lower neck ring.

A head enclosing treatment hood, comprising:

• a hood affixed to a hood ring;
• a two piece neck ring sealingly combined with said hood ring having of an upper neck ring, said upper neck ring having a plurality of downwardly extending hooks, and a lower neck ring having a plurality of apertures through which said hooks extend;
• a neck seal extending inwardly from said two piece neck ring wherein said neck seal is compressively disposed between said upper neck ring and said lower neck ring by an O-ring seal, said O-ring seal compressed between said upper neck ring and said lower neck ring by a retaining ridge;
• a plurality of hook standoff ridges extending downward from said lower neck ring about said downwardly extending hooks of said upper neck ring and extending below a lower edge of said hooks.