Patent ID: 7270536

Claim:
A screw tip for use in a molding system apparatus, said screw tip comprising: a body, an entry port in said body, a plurality of support guides, and a check valve chamber in said body, said check valve chamber communicating with said entry port to provide a flow path through said chamber, said check valve chamber having a surface for engaging, in use, a translatable member operable between a flow position and a shut off position, said plurality of support guides intermediate a surface of said chamber and a surface of said translatable member for supporting and guiding, in use, said translatable member between said flow position and said shut off position, wherein said check valve chamber in an end of said body is operable in use to control a flow of material, a plurality of entry ports in said body, wherein said check valve chamber is central in said body about an axis and said plurality of entry ports in said body communicate with said check valve chamber, a translatable member, said translatable member positioned in said check valve chamber about said axis, said support guides cooperating with said body and said translatable member to position said translatable member in said check valve chamber about said axis and permit said translatable member to operate, in use, between said flow position and said shut off position, and said support guides are three pins equally spaced about a circumference of said check valve chamber, said pins engaging a sidewall area of said translatable member to support and guide movement, in use, of said translatable member.