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US 4,008,302 AGranted
Method of molding plastic elements on a continuous web
AssigneePolaroid Corporation
InventorIrving Erlichman
Life of this patent
Estimating the term…
Abstract
A continuous web of identical plastic parts is produced by molding a first unit comprising at least one of such parts in a mold, and connecting such molded part(s) to subsequent molded parts, by means of at least one runner upon which all the parts comprising the web are molded. The runner(s) connecting the parts may include indicia of data such as, indexing, information, part treatment information, assembly information, inventory information, etc.
Claims8
A method for forming a continuous web comprising plastic molded elements comprising:
- inserting into a mold comprising a cavity a forward portion of at least one continuous runner element;
- causing a section of said runner element to traverse a part of the mold cavity and protrude from the mold;
- injecting into the mold cavity a liquid material capable of being cured to form a solid;
- curing said liquid material in said mold cavity whereby the cured material is secured to the runner section in said mold cavity;
- opening said mold and applying sufficient force to said runner to cause the molded part secured thereto to be ejected from the mold;
- concomitantly positioning a subsequent portion of said continuous runner element in said cavity;
- and
- closing the mold and repeating the molding and ejection cycle whereby a web comprising molded plastic parts secured to at least one continuous runner element is formed.
5 more elements
Dependencies are inferred from the claim text.