Amp LLC

Jack F Dubbs

Clyde K Hanyen

Johannes C Bakermans

Lawrence R Holbrook

Stamping die for use with a punch to produce holes in strip material with the resulting production of a slug has a camming rib in the die opening. The rib prevents slug pulling when the punch returns from its extended position to its retracted position. The camming rib causes the slug to become wedged in the die opening and is effective to move the slug laterally in its own plane across the leading edge of the punch thereby overcoming any surface tension or other forces which might cause the slug to adhere to the face of the punch. The camming rib can be straight and extend parallel to the axis of the die opening if the die opening is not tapered. If the die opening has a slight taper, the camming rib is inclined thereby to cause movement of the slug across the face of the punch as the punch moves into the die opening.

Prevention of slug pulling in stamping presses

A continuous strip of spaced-apart electrical contacts is taught. Briefly stated, a mold structure is utilized to position a plurality of contacts in a mold. A polymeric material such as silicone is thereafter injected into the mold which fills the interior portion of the contact as well as encapsulating the exterior upper portion of the contact, thereby producing a strip of spaced-apart electrical contacts having a molded carrier strip of flexible polymeric material. The strip is advanced such that a portion remains in the mold. The mold is then refilled with additional contacts, and the material is again injected to encapsulate the additional contacts as well as to secure this strip to the previous strip.

Method of forming a flexible strip of encapsulated contact members

A continuous strip of spaced-apart electrical contacts is taught. Briefly stated, a mold structure is utilized to position a plurality of contacts in a mold. A polymeric material such as silicone is thereafter injected into the mold which fills the interior portion of the contact as well as encapsulating the exterior upper portion of the contact, thereby producing a strip of spaced-apart electrical contacts having a molded carrier strip of flexible polymeric material. A series of notches or recesses are formed in the walls of the strip which thereby allows for precise indexing and contact spacing for insertion of the contact strip into a circuit board. The polymeric material which is disposed on the interior of the contact prohibits the introduction of contaminants into the interior of the contact as well as providing a reenterable aperture for placing electrical components having terminal leads.

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Harrisburg, PA, United States of America

Jack F Dubbs