US 4,225,304 AGranted

Apparatus for the preparation of hollow plastic articles

OwnerEmery I. Valyiinventor

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Abstract

Apparatus for the preparation of hollow plastic articles wherein a more rapid operating cycle is obtained with less effect upon the temperature of the parison. The apparatus includes a first core, means for providing a parison thereon, a temperature controlled first mold engageable with said first core and parison, means for separating the first core from the first mold and parison contained therein, a second core in spaced relationship to the first core, means for transferring the parison to the second core, a blow mold in spaced relationship to said first mold for fully expanding the parison and means for transferring the second core and parison to the blow mold, wherein the blow mold is stationary and the second core with parison thereon is brought into alignment with the blow mold and is inserted therein.

Claims13

Dependent claims

An apparatus for forming oriented, blown objects of moldable plastic material requiring prolonged tempering cycles to obtain conditions suitable for orientation, said apparatus including a multiplicity of tempering molds in spaced relationship to each other for retaining and tempering parisons prior to orientation and blowing in a tempering cycle, means engageable with each one of said tempering molds for placing and leaving parisons to be tempered in each said engageable tempering mold seriatim at a first station, means for moving seriatim each of engageable tempering molds containing a parison prior to orientation and blowing from said first station to at least one second station spaced from and adjacent to said first station for prolonged tempering, a blow mold for forming said tempered parisons into oriented, blown objects in spaced relationship to said second station, and means for removing said tempered parisons at the end of said tempering cycle prior to orientation and blowing from said tempering molds and placing same into said blow mold, whereby said tempering molds receive and release said parisons seriatim, and whereby the overall cycle of said apparatus is substantially unaffected by the number of said tempering molds.

Dependencies are inferred from the claim text.

Facts

Application: 06/005,960Filed 24 Jan 1979 · division
Priority: 28 May 1974
Granted: 30 Sep 1980
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

B29C 49/08
Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor: biaxial stretching during blow-moulding
B29C 49/24
Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor: lining or labelling
B29C 49/6409
Heating or cooling preforms, parisons or blown articles: thermal conditioning of preforms
B29C 49/06
Combined blow-moulding and manufacture of the preform or the parison: injection blow-moulding

Family

Serial473,580Parent of this continuation-in-part · filed 28 May 1974
Serial479,287Parent of this division · filed 14 Jun 1974
Serial641,638Parent of this continuation-in-part · filed 17 Dec 1975
Serial911,359Parent of this division · filed 1 Jun 1978
US 4,115,494 AParent of this continuation-in-part
US 3,970,419 AParent of this division
US 3,966,378 AParent of this continuation-in-part
US 4,225,304 AThis patent

From the US filing history. Foreign family members aren’t listed.