Magnetic tape cassette and method for manufacturing magnetic tap

Details Magnetic tape cassette and method for manufacturing magnetic tap Magnetic tape cassette and method for manufacturing magnetic tap

1992-12-03

1994-08-30

Stodola, Daniel P.

Winding, tensioning, or guiding

Unwinding and rewinding a machine convertible information...

Cartridge system

2643288, 2643289, 425562, G11B 23087

Patent

active

053420020

ABSTRACT:
A magnetic tape cassette and a method for manufacturing a magnetic tape cassette including a combination of upper and lower half cases each including a window part and a main body half, the main body half including a trapezoidal portion on a top side of the main body half extending along a length thereof and defining a portion of the cassette having an increased thickness. The cassette is produced in accordance with a process including the steps of providing a mold having a first injection space defining the main body half and a second injection space defining the window part, providing a first gate, communicating with the first injection space, in the metal mold at a position of the trapezoidal portion of the main body half, injecting a first resin into the first injection space through the first valve gate, providing a second valve gate, communicating with the second injection space, in the metal mold, and injecting a second resin into the second injection space through the second valve gate. The first gate is positioned centrally along the length of the trapezoidal space and the first and second resins have different colors.

REFERENCES:
patent: 4306663 (1981-12-01), Gelardi et al.
patent: 4440359 (1984-04-01), Nelson
patent: 4681280 (1987-07-01), Duurland et al.

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