Preforms for flair applications
OwnerWilhelmus Johannes Joseph Maas, Petrus Lambertus Wilhelmus Hurkmans +1inventors
InventorsWilhelmus Johannes Joseph Maas, Petrus Lambertus Wilhelmus Hurkmans, Aaron S. Haleva
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Abstract
A preform can be made from two different materials that do not bond together by a bi-injection process, using the same mold. First an outer preform can be fashioned first, then an inner preform molded through a center hole in the outer preform, and the preforms connected. Inner/outer preform materials can be different, e.g., PET/polyolefin or polyamide, or the same, e.g., PET/PET. To prevent mutual bonding during molding of the second, a non-stick coating can be sprayed on a surface portion of the first preform prior to molding, the second. Manufacturing order can be either outer/inner, or inner/outer, and the non-stick coating sprayed on the inside/outside of the perform first molded.
Claims15
A pre-form for a liquid dispensing device, comprising:
- an inner layer;
- and
- an outer layer,
- the inner layer is connected to the outer layer at both a top portion of the pre-form a bottom portion of the pre-form;
- and
- the inner layer comprises a neck, the neck provided with four lugs on an outer surface of the neck, the four lugs equidistantly spaced around the outer surface of the neck, and configured to mate with corresponding hooks of a cover,
- wherein two of the four lugs, provided opposite each other on the outer surface of the neck (“lead-in lugs”), are each further provided with a rotational lead-in guidance structure adjacent or attached to an upper portion of the lug, configured to guide a corresponding hook downwards towards the lug when the cover is rotated towards the lug,
- wherein, two others of the four lugs (“plain lugs”) do not have the rotational lead-in structures, the plain lugs each comprising a single vertical protrusion from the neck connected to a single horizontal protrusion from the neck, and
- wherein the two lead-in lugs each further include first and second vertical protrusions from the neck, each having the same height, connected to opposite ends of a single horizontal protrusion from the neck, the rotational lead-in guidance structure attached or adjacent to a first of the vertical protrusions, the first vertical protrusion being a vertical back-off prevention rib, configured to require a minimum rotational force needed to remove a hook from within the lug.
Dependencies are inferred from the claim text.