Blow Molded Case and System for Creating Same
a technology of blow molding and molded cases, which is applied in the field of blow molding cases, can solve the problems of reducing the weight of the case, increasing the weight and size of the case, and cutting or burning sections of the case wall, so as to achieve the effect of maximizing the amount of useable spa
Inactive Publication Date: 2009-03-12
GRINNALL MICHAEL L +4
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Benefits of technology
The solution maximizes usable space, minimizes case size, and eliminates the need for post-manufacturing modifications, ensuring the case is lightweight and easy to manufacture while accommodating tools and accessories efficiently.
Problems solved by technology
Though such cases are generally well known in the art, efforts have been made to increase the carrying capacity of such cases while reducing the size of the case, as attempts to increase the interior space of the case can quickly increase the weight and size of the case due to its double wall nature.
Moreover, by removing sections of the walls, the case also decreases significantly in weight.
In these particular examples, because the blow molding process involves the use of a parison with a continuous, unbroken surface (and thus, the mold itself cannot produce any holes in the blow-molded wall other than the hole or holes through which the fluid pressure is introduced), a section of the case wall is cut or burned after the blow molding process is completed and the case has been ejected from the mold.
Round holes were often cut with hole saws, or occasionally, were burned.
One limitation such cases may still have in some applications, however, is their ability to accommodate compartments for accessories.
Method used
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[0033]The basic components of one embodiment of a blow molded case in accordance with the invention are illustrated in FIGS. 1-2. As used in the description, the terms “top,”“bottom,”“above,”“below,”“over,”“under,”“above,”“beneath,”“on top,”“underneath,”“up,”“down,”“upper,”“lower,”“front,”“rear,”“back,”“forward” and “backward” refer to the objects referenced when in the orientation illustrated in the drawings, which orientation is not necessary for achieving the objects of the invention.
[0034]The case 10 includes a double wall base portion 12 and a lid portion 14 connected thereto. In some embodiments, the lid portion 14 is a separate piece that is connected to the base portion 12 after the blow molding process is completed via a hinge mechanism 15. However, like the base portion 12, the lid portion 14 may also be a blow molded article, and thus, in certain embodiments, the lid portion 14 is integrally formed with the base portion 12 during a single blow molding process.
[0035]The ba...
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A blow molded case is disclosed generally comprising a double wall, blow molded base portion having inner and outer case walls, and a lid portion connected to the base portion such that the lid, when in a closed position, at least partly covers the inner case wall of the base portion, which accommodates a first object. The outer wall of the base portion has a hole for receiving a second object, such as a drawer or other receptacle. In certain embodiments, the hole is a punched hole, created by extending a punch through a sidewall of the base portion substantially perpendicular to the parting line thereof. In certain embodiments, the sidewall is non-planar, and in some embodiments, the sidewall includes a recess adjacent the hole for easily gripping the second object.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This is a continuation of co-pending U.S. patent application Ser. No. 11 / 180,230, filed Jul. 13, 2005, now U.S. Pat. No. 7,455,513.FIELD OF THE INVENTION[0002]The present invention relates to blow molded cases. More specifically, the invention relates to blow molded cases having a double wall base portion with a hole in the outer wall thereof for accommodating additional objects, such as drawers or removable containers, as well as a system for creating such cases.BACKGROUND OF THE INVENTION[0003]The use of blow-molding as a method for manufacturing various sorts of articles is generally well known. Typically, this process involves the use of a mold consisting of two separate halves or portions having cavities of particularly desired shapes and sizes. Usually, one extrudes a large-diameter, sealed tube of molten material (commonly referred to as a “parison”), places the tube between the mold halves, and closes the mold around the tube. Flu...
Claims
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IPC IPC(8): B65D6/00
CPCB25H3/023B25H3/028B29C49/04B29L2031/7418B29C2049/503B29C2793/0018B29L2031/283B29C49/50
InventorGRINNALL, MICHAEL L.COZZENS, DAVID W.BAHNSEN, CLAYGUIDEBECK, STEVEN P.WIESE, JAMES M.
OwnerGRINNALL MICHAEL L