Patent ID: 8851874

Claim:
A mold comprising: a first mold portion and a second mold portion engageable to define a mold cavity in a closed position of the mold, the first mold portion comprising a first part-line surface and the second mold portion comprising a second part-line surface, the first part-line surface comprising a projection portion and the second part-line surface comprising a receptacle with a resilient portion therein, the resilient portion having a non-arched surface for substantially sealing engagement with the projection portion in the closed position of the mold, the projection portion configured to (i) extend below the surface of the second part-line surface in the closed position of the mold, and (ii) depress into the non-arched surface of the resilient portion in the closed position of the mold to cause the resilient portion to extend to the second part-line surface, but not to enter the mold cavity, the projecting portion having a wedge shape with an apex that is narrower than a width of the non-arched surface of the resilient portion.