Dimensionally stable fiberglass reinforced thermoplastic magnetic tape data cartridge body
AssigneeThe B. F. Goodrich Company
InventorsRobert D. Dangler, Frederick J. Brannan
Life of this patent
Estimating the term…
Abstract
A dimensionally stable fiberglass reinforced thermoplastic magnetic tape data cartridge case, capable of being operated by a high speed tape drive and able to endure rapid tape acceleration and deceleration without becoming warped or otherwise damaged. The cartridge case includes a fiberglass reinforced thermoplastic backplate and cover. The axles for the tape spools and other rotating components of the cartridge are preferably molded into the backplate and extend through boss circumscribed holes in the cover which provide additional dimensional stability to the cartridge.
Claims4
A tape cartridge case comprising a backplate and cover both formed of a fiber reinforced thermoplastic matrix material, wherein said fiber reinforced thermoplastic matrix material contains from about 15 to about 85 percent by weight of a thermoplastic polyurethane component and from about 85 to about 15 percent by weight of an immmiscible thermoplastic polymer component based upon the total weight of the thermoplastic polyurethane component and the immiscible thermoplastic polymer component, wherein the amount of fibers in the matrix material is from about 5 percent to about 60 percent by weight based upon the total weight of the thermoplastic polyurethane component, the immiscible thermoplastic polymer component and the fibers, the matrix material being prepared in the presence of high shear, wherein said immiscible thermoplastic polymer component is PET, modified PET, a block styrenic copolymer, a polyether block amide (PEBA), a polyester-ether copolymer, or ethylene propylene diene (EPDM) terpolymers, and wherein the exterior surfaces of said case are smooth and essentially free of fibers.
Dependencies are inferred from the claim text.