Method for decorating the top of a container closure cap
AssigneeSacmi- Cooperative Meccanici Imola - Soc. Coop. A.R.L.
InventorFiorenzo Parrinello
Life of this patent
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Abstract
Method for decorating the top of a compression-molded cap of synthetic material intended to close a container, in which the decoration is positioned on a flat support in the form of a disc which is placed in the cavity of the cap forming mold before the constituent material of the cap is introduced, and is found to be bonded to the top of the cap after its removal from the mold.
Claims5
A method of decorating the top of a compression molded cap, during a compression molding process, comprising
- providing a preformed insert capable of fitting within a compression mold having a cavity and a punch, said preformed insert having a thickness between 0.01 and 0.3 mm, and having indicia thereon;
- placing said preformed insert either within said cavity or on said punch;
- inserting within said cavity a thermoplastic material in solid form, at a temperature less than its melting temperature;
- and
- inserting the punch into said cavity to form said cap and uniting said preformed insert with said thermoplastic so as to provide said cap with said indicia of said preformed insert without deformation of said insert.
A method of decorating the top of a compression molded cap during a compression molding process comprising
- providing a preformed insert capable of fitting within a compression mold having a cavity and a punch, said preformed insert having indicia thereon;
- placing said preformed insert either within said cavity or on said punch;
- inserting within said cavity a thermoplastic material in solid form at a temperature at which said thermoplastic material retains its solid form;
- and
- inserting the punch into said cavity to form said cap and uniting said preformed insert with said thermoplastic so as to provide said cap with said indicia of said preformed insert;
- wherein said thermoplastic material has a melting or softening temperature greater than that of said preformed insert, and said uniting is carried out at a temperature at which at least an interface of said preformed insert adjacent said thermoplastic fuses, said temperature being at least 165° C.
Dependencies are inferred from the claim text.