Method and apparatus for molding magnetic tape cassette

Details Method and apparatus for molding magnetic tape cassette Method and apparatus for molding magnetic tape cassette

1994-08-31

1995-12-05

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

264246, 264247, 264250, 2643287, 2643288, 264310, 4251291, 425576, 425588, B29C 4504, B29C 4516

Patent

active

054726557

ABSTRACT:
A method and apparatus for molding casing halves of a magnetic tape cassette in which one or more-windows in the casing half are firmly retained by remaining portions thereof regardless of the solubility of the two plastic materials employed or other molding conditions. The window is formed with a projecting edge portion which extends well into the plastic of the remaining portions of the casing half. In one embodiment, the window is molded first and then the remaining portions are molded around the edge portions of the window. In another embodiment, the other portions are molded first using slidable cores to define the window portions, and then the windows are molded.

REFERENCES:
patent: 3807920 (1974-04-01), Aoki
patent: 4518554 (1985-05-01), Hatakeyama et al.
patent: 4726758 (1988-02-01), Sekihe et al.
patent: 4840760 (1989-06-01), Oishi

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