초록 ▼

This method is an improvement of an existing apparatus and method employed to remove paper or plastic film labels from plastic blow molded bottle scrap. Mechanical improvements have been made in two areas. The first area of improvement consists of the addition of multiple stages to the vertically mo

This method is an improvement of an existing apparatus and method employed to remove paper or plastic film labels from plastic blow molded bottle scrap. Mechanical improvements have been made in two areas. The first area of improvement consists of the addition of multiple stages to the vertically mounted rotating blade assembly and cooperating multiple stationary elements within the stator assembly. The second area of improvement is within the air induction system and consists of improvements of the flow and control of the air stream which entrains the waste from the process mass. The method improvement of this invention results from the employment of these mechanical advancements.

대표청구항 ▼

An improvement to an existing method for decontaminating thermoplastic materials, said existing method including the steps of: placing into a container a quantity of contaminated material consisting essentially of pieces of thermoplastic material from molded plastic containers and contaminant adhere

An improvement to an existing method for decontaminating thermoplastic materials, said existing method including the steps of: placing into a container a quantity of contaminated material consisting essentially of pieces of thermoplastic material from molded plastic containers and contaminant adhered thereto and mixed therewith; mechanically agitating said contaminated material in said container until some of said contaminants are dislodged from adhesion to said pieces of thermoplastic material; thereupon spraying a predetermined amount of liquid solvent into said container with said contaminated material; thereafter continuing to agitate said contaminated material together with said solvent and, by said agitation action, separating more of said contaminants from adhesion to said pieces of thermoplastic material; substantially continuously withdrawing a stream of gas from said container while performing said steps of decontaminating said thermoplastic materials; ceasing agitation of said pieces of thermoplastic material; and, thereafter removing said pieces of thermoplastic material from said container; to said existing method of decontaminating thermoplastic materials, improvements are added comprising: a) a first step wherein said process mass is subjected to high frequency impact within an apparatus comprised of rotating blade members mounted on a substantially vertical shaft, said rotating blade members operating on at least two planes cooperating with at least two stationary members on at least two planes within a processing area of said apparatus; b) a second step wherein said containment vessel is substantially closed to atmospheric pressure, c) a third step wherein air at high velocity is forced into said process mass at substantially the bottom of a containment vessel of said apparatus whereby turbulence is induced at the mixing point of said air at high velocity and said process mass, and wherein said air at high velocity entrains said paper or plastic product label material waste and carries it away from said granulated plastic container material; d) a forth step wherein said air containing entrained paper or plastic product label material waste is directed through an air classification member for the purpose of separating said paper or plastic product label material waste from inadvertently entrained granulated plastic container material; and, e) a fifth step wherein an air lock means separating said air classification member and said containment vessel is provided whereby said inadvertently entrained granulated plastic container material is returned to said process mass.