초록 ▼

A necking apparatus for producing a smooth, inwardly tapered necked-in portion on a cylindrical container includes a plurality of necking modules and a turret which is rotatably mounted in each module about an axis of rotation. Each turret includes an upper turret frame which is mounted on the axis

A necking apparatus for producing a smooth, inwardly tapered necked-in portion on a cylindrical container includes a plurality of necking modules and a turret which is rotatably mounted in each module about an axis of rotation. Each turret includes an upper turret frame which is mounted on the axis of rotation and which can be moved axially relative to the turret and a lower turret frame. A plurality of necking dies are mounted on the upper turret frame, and a plurality of container supports are axially aligned with the necking dies and are mounted on the lower turret frame for axial movement. Each necking die includes a necking portion for engaging and necking a side wall of a container as the aligned container support moves a container toward the necking die. The positions of the necking dies are adjusted by spacers so that the necking portion of each die does not engage the tapered necked-in portion of the container as the container support is moved toward the die.

대표청구항 ▼

[ We claim:] [1.] A necking apparatus for producing a smooth inwardly tapered necked-in portion adjacent an open end of a container having a generally cylindrical side wall comprising:a plurality of necking modules, each of the necking modules includinga module frame and a turret rotatably mounted o

[ We claim:] [1.] A necking apparatus for producing a smooth inwardly tapered necked-in portion adjacent an open end of a container having a generally cylindrical side wall comprising:a plurality of necking modules, each of the necking modules includinga module frame and a turret rotatably mounted on the module frame for rotation about a fixed axis, the turret of each of the modules includinga drive shaft rotatably mounted on the module frame, an upper turret frame mounted on the drive shaft, a lower turret frame mounted the drive shaft, and a plurality of necking substations mounted on the upper and lower turret frames, each of the necking substations includingan annular necking die mounted on the upper turret frame, the necking die having a first cylindrical wall surface substantially equivalent in diameter to the container side wall and a second cylindrical wall surface of lesser diameter and a tapered neck extending between the first and second cylindrical wall surfaces, a container support mounted on the lower turret frame in axial alignment with a necking die, and cam means for producing relative axial movement between the necking die and the container support, between a first position in which the necking die and the container support are a maximum distance apart and a second position in which the necking die and the container support are a minimum distance apart,the improvement comprising means for varying the axial spacing between the upper turret frame and the lower turret frame of each of the turrets whereby the axial spacing between each necking die of the turret and the associated container support may be varied so that when the necking die and the container support are in the second position the tapered neck of the necking die does not engage the tapered necking-in portion of a container supported by the container.