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US 4,541,795 AGranted
Injection mold for a bottle closure device
AssigneeJames R. Goldberg
InventorHarold E. Cole
Life of this patent
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AssigneeJames R. Goldberg
InventorHarold E. Cole
Estimating the term…
A mold and a molding method are described for forming a closure device having a cap portion, a cylindrical plug portion extending therefrom, and a cylindrical collar extending substantially coextensively and coaxially with the plug portion spaced therefrom to provide an annular recess for receiving the open end of the container to be closed. The mold cavity is defined by mold segments and by a substantially cylindrical hollow outer core which extends into the mold cavity and defines the annular recess in the closure device between the collar and the plug portion. The mold segments include a gripping portion for retaining the closure device. The gripping portion retains the closure device while the outer core is extracted from the cavity. The gripping portion of the mold segments is then separated along with the remainder of the mold segments to remove the molded device.
A mold for forming a closure device having a cap portion, a cylindrical plug portion extending therefrom, and a cylindrical collar extending substantially coextensively and coaxially with the plug portion spaced therefrom to provide an annular cavity for receiving the open end of the container to be closed, said mold comprising, mold means enclosing a mold cavity defining the outer surface of the closure device, substantially cylindrical hollow outer core means extending into said mold cavity and defining the annular cavity in the closure device including the inner surface of the cylindrical collar and the outer surface of the plug portion, said mold means including a gripping portion for retaining the closure device when said outer core means are extracted from the annular cavity, said gripping portion of said mold means comprising means for forming a tear strip and tether section in the cylindrical collar of the closure device.
Dependencies are inferred from the claim text.