Patent ID: 6250135
Filing Date: 2001-06-26
Classification: B21D

Abstract:
Apparatus for detecting a defect during a formation of a container end having a pull tab secured thereto and wherein the pull tab has a finger hole formed therein and wherein the apparatus includes a lower die on which the container end is supported comprising:an upper die having a longitudinal axis and mounted for longitudinal movement toward or away from said lower die;detecting apparatus having a longitudinal axis and mounted in said upper die for movement therewith and for longitudinal movement relative thereto;said detecting apparatus having a lowermost portion having a transverse configuration corresponding to but slightly smaller than a transverse configuration of said finger hole;said lowermost portion of said detecting apparatus being located to enter into said finger hole when said upper die is in a lowermost position adjacent to said lower die;said lowermost portion of said detecting apparatus normally being in a lowermost position when said upper die is in said lowermost position;sensing apparatus being entirely mounted at a fixed location on said upper die for movement therewith;said detecting apparatus having at least a portion thereof located on said upper die to be sensed by said sensing apparatus;said sensing apparatus having at least a portion thereof located on said upper die to sense a location of said at least a portion of said detecting apparatus; andsaid sensing apparatus generating a signal when said upper die is at said lowermost position and said detecting apparatus has been moved a distance from said lowermost position thereof.