Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Making hole or aperture in article
Patent
1989-09-29
1991-09-17
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Making hole or aperture in article
264132, 264155, B28B 148, B28B 716, B29B 1108
Patent
active
050493370
ABSTRACT:
A method for image-transfer molding half portions of a casing body of a magnetic tape cassette in which no portions of an image transfer film are left in the cassette holes. The image transfer film includes a base layer, a peeling layer, a protective layer, an ink layer, and an adhesive layer. A band of the image transfer film is pinched between dies for molding said half portion, with the adhesive layer positioned so as to abut an outer surface of the molded half portion. A pair of pins is placed in the dies in a position where a hole is to be formed in the half portion, with an end of one of the pins having a peripheral edge portion projecting in a direction parallel to the longitudinal axis of the pin and forming a recess receiving the end of the other of said pins with a portion of the image transfer film sandwiched therebetween. The ends of the pins cooperate to sever the image transfer film along the peripheral edge except for the base layer so that the base layer can be peeled away leaving no portions of the image transfer film in the holes.
REFERENCES:
patent: 3699204 (1972-10-01), Ogata
patent: 4752059 (1988-07-01), Oishi et al.
Katagiri Shingo
Moriwaki Masayoshi
Fuji Photo Film Co. , Ltd.
Ortiz Angela Y.
Silbaugh Jan H.
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