Molded plastic container having insert-molded insert and method of manufacture
View Patent ↗A plastic container has an open end and an imperforate container wall with a base, an outwardly open pocket in the container wall, and an insert disposed in the pocket. The insert preferably is captured in the pocket by blow molding the container wall around the insert. The pocket and insert preferably are disposed in the base of the container opposite the open end of the container, most preferably centrally of the base, and the insert preferably is visible in the container base through an external opening into the pocket.
1. A method of making a plastic container, which includes the steps of:
(a) providing a plastic container preform,
(b) placing said plastic container preform in a blow mold,
(c) blowing said plastic container preform within said blow mold to form a hollow plastic container,
(d) placing an RFID tag disposed in a housing having a wall on an actuator external to said blow mold, and
(e) prior to said step (c) actuating said actuator and mounting said RFID tag to an external surface of said preform so that said RFID tag is blow molded into an outwardly open pocket of said container during said step (c), when container material is blown against said housing wall which forms a dam against flow of container material around said housing and forms an opening into said pocket through which said housing is visible,
wherein said step (e) includes mounting said RFID tag to a closed end of said preform such that said RFID tag is molded into a base of said container following said step (c), and
wherein said housing has external features that are embedded into said end of said preform during said step (e).
2. The method set forth in claim 1 wherein said step (e) is carried out by extending said actuator into said mold following said step (b).
3. A method of making a container preform for blow molding into a plastic container, which includes the steps of:
(a) molding a preform of plastic material at elevated temperature, and
(b) securing an RFID tag onto said preform following said step (a) and while said preform is at elevated temperature,
wherein said RFID tag is disposed within a plastic housing including a base with a peripheral wall, and a disk mounted within the peripheral wall to capture said RFID tag and having external features, and wherein said step (b) includes securing said plastic housing to an outside surface of said preform by embedding said external features in said outside surface of said preform wherein said external features do not extend to the interior of said preform.
4. The method set forth in claim 3 wherein said preform molded in said step (a) has a closed end, and wherein said step (b) includes securing said RFID tag to an outside surface of said closed end.
5. The method set forth in claim 4 including the step of: (c) blow molding said preform into a plastic container having said housing on a base of said container.
6. A method of making a plastic container, which includes the steps of:
(a) providing a plastic container preform at elevated temperature,
(b) placing said plastic container preform in a blow mold,
(c) blowing said plastic container preform within said blow mold to form a hollow plastic container having a container base,
(d) providing an RFID tag disposed in a housing having a wall, and
(e) between said steps (a) and (c), securing said RFID tag to an external surface of said closed end such that said RFID tag is disposed on said container base following said step (c),
wherein said RFID tag is blow molded into an outwardly open pocket of said container when container material is blown against said housing wall which forms a dam against flow of container material around said housing and forms an opening into said pocket through which said housing is visible, and
wherein said step (d) includes providing said housing with at least one external feature, and said step (e) includes embedding said at least one external feature in said closed end of said preform wherein said at least one external feature does not extend to the interior of said plastic container preform.
7. The method set forth in claim 6 wherein said housing includes a base having a peripheral wall and a disk having a periphery internally engaged by said peripheral wall, said RFID tag being disposed on an inlay captured between said base and said disk within said peripheral wall, said at least one external feature being disposed on one of said base and said disk.
8. The method set forth in claim 7 wherein the other of said base and said disk includes an annular wall that cooperates with said blow mold during said step (e) to prevent container material from covering a center portion of said housing.
9. A method of making a plastic container, which includes the steps of:
(a) providing a plastic container preform,
(b) placing said plastic container preform in a blow mold,
(c) blowing said plastic container preform within said blow mold to form a hollow plastic container,
(d) placing an insert having a wall on an actuator external to said blow mold, and
(e) prior to said step (c) actuating said actuator and mounting said insert to an external surface at a closed end of said preform so that said insert is blow molded into an outwardly open pocket of said container during said step (c) when container material is blown against said insert wall which forms a dam against flow of container material around said insert and forms an opening into said pocket through which said insert is visible,
wherein said insert has external features that are embedded into said end of said preform during said step (e) and said external features do not extend to the interior of said preform.
10. The method set forth in claim 9 wherein said insert is a plastic insert.