Glass ribbon machine blow head mechanism

Claim 1

In a glass working machine for forming hollow glass articles, the combination of a plurality of blow heads, said blow heads each including a link body assembly and means connecting said link body assemblies together as articulated links of a blow head carrier, means mounting said carrier for operative movement in an endless path and including in said path movement along a horizontal operative run, a blow head sleeve, said body assembly defining a housing for said sleeve, said sleeve having an axial air passage, a blowpipe telescopically mounted in said sleeve for axial relative movement, said blowpipe having an axial air passage connected with said sleeve air passage, a first cam follower means, means connecting said first follower means on said blowpipe, a second cam follower means, means connecting said second follower means on said sleeve, a blowbox conduit means, means connecting said blowbox means on the machine along said horizontal operative run of the carriage and spaced above said blow heads thereat, a supply of blow air connected into said blowbox means, the latter having apertures adapted for connection of blow air to said sleeve air passage, a first cam, means attaching said cam on the machine for engagement with said first cam follower means responsive to movement of the blow head by said carriage along said horizontal operative run, said first cam initially maintaining each said blowpipe in a retracted position in said operative run, a second cam, means connecting said second cam on the machine for engagement with said second cam follower means responsive to movement of the blow head by said carriage along said horizontal operative run, said second cam including a first segment for lowering each said sleeve initially out of connection with said blowbox means and a second segment for raising each said sleeve for connecting its air passage with said blowbox apertures, and a third cam, means connecting said third cam on the machine in said horizontal operative run to extend horizontally beyond said first cam and be engageable with said first cam follower means responsive to movement of the blow head, said third cam positively shifting each of said blowpipes into an extended operative position for blowing glass on the machine, thereby successively uniformly manipulating the blowpipes into an operative glass working position on the machine.