Patents Assigned to Custom-Pak, Incorporated
  • Patent number: 5288453
    Abstract: A die construction for forming integral hinges (60) for a blow molded carrying case. An edge of the main cavity of a lower die (12) of a blow molding die pair is provided at one peripheral wall portion (40) with sloping channels (38). A core pin (32) extends across and spans the sloping channels. The upper die (10) is provided at one peripheral portion with semi-cylindrical recesses (22) coaxial with the core pin and of the same length as the width of the sloping channel. A heated parison (46, 48) is placed (FIG. 1) between the two dies. With die closing and with the introduction of pressurized air (52) into the parison, the parison is deformed. At the same time, the pressurized air also causes one of the plastic parison sheets (46) of the parison to deform into the semi-cylindrical recess, and the other parison sheet (48) to deform into the sloping channel and also around the core pin. The two parison sheets fuse together around the core pin upon complete closing of the two dies (FIG.
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: February 22, 1994
    Assignee: Custom Pak, Incorporated
    Inventors: Mark M. Rutenbeck, Steven W. Neff
  • Patent number: 4615464
    Abstract: A container case includes a cover, a base and a hinge which pivotally joins the cover and the base on a corresponding side of each. The cover, base and hinge are formed by blow molding. The cover and base are double-walled in construction and identical so that they can be formed from the same mold. Each of the cover and base includes cylindrically-shaped, hollow extensions which form portions of the hinge. When the case is assembled, alternate hinge portions of the cover and base are aligned end-to-end along a common axis and cooperatingly mate to form the full hinge. The hinge is drilled to form openings in the end surfaces of the mating hinge portions which communicate with the interior, hollow areas of the hinge portions to form a single bore through the entire axial length of the hinge. A polyethylene pin is received by the hinge bore to interlock the individual hinge portions.
    Type: Grant
    Filed: June 5, 1985
    Date of Patent: October 7, 1986
    Assignee: Custom-Pak, Incorporated
    Inventor: James E. Byrns