초록 ▼

Apparatus is disclosed for the forming of an annular depending skirt on the bottom of a container, such as a carbonated beverage bottle, which includes a plurality of articulated fingers extending into the mold cavity having distal ends which are proportioned to be received within a preform skirt po

Apparatus is disclosed for the forming of an annular depending skirt on the bottom of a container, such as a carbonated beverage bottle, which includes a plurality of articulated fingers extending into the mold cavity having distal ends which are proportioned to be received within a preform skirt portion prior to the blowing of the preform. The fingers are operated by engagement of cam surfaces concurrently with the blowing of the preform into a mold cavity to cause a programmed expansion of the skirt portion into a final single thickness annular skirt on the finished container.

대표청구항 ▼

Apparatus for the formation on a blow-molded container of a skirt on the container bottom to provide for the free standing of the container in an upright position, said container being blown in a mold cavity from a preform having an annular skirt portion at an end thereof remote from the container t

Apparatus for the formation on a blow-molded container of a skirt on the container bottom to provide for the free standing of the container in an upright position, said container being blown in a mold cavity from a preform having an annular skirt portion at an end thereof remote from the container top and surrounding an end of the preform, comprising a mold having a mold cavity, a closed bottom a plurality of articulated fingers in said mold cavity arranged in an annular array, said fingers terminated in distal ends proportioned to be received within said preform skirt portion prior to blowing of said preform, means supporting said fingers for axial and radial movement with respect to said mold cavity, means responsive to movement of said preform in said mold cavity during blowing thereof for causing programmed radial movement of said fingers in unison concurrently with axial movement thereof, to stretch said skirt portion into an annular support skirt on the container bottom.