Tape reel with thin flange portions

Details Tape reel with thin flange portions Tape reel with thin flange portions

1994-08-16

1995-10-10

Nguyen, John Q.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

2426141, 2426106, B65H 7514

Patent

active

054564239

ABSTRACT:
A tape reel in which a thin flange portion is formed by reducing a thickness of each of front and rear flange surfaces of the tape reel and a thick portion having a thickness larger than that of the thin flange portion is formed at a plurality of places of an outer periphery of the flange portion. When the tape reel is molded by using a molding metal mold, a pin is inserted into the molding metal mold at a portion corresponding to a portion where a resin is filled into the thin flange portion last, and air and gas within a cavity are discharged from a spacing formed between the molding metal mold and the pin. Thus, the occurrence of short mold and weld line on the thin portion of the tape reel thus molded can be avoided and a rotational fluctuation of the reel flange surface can be avoided. The front and rear surface portions of each of upper and lower flanges of the tape reel are further formed as thin flange portions by uniformly reducing the thickness of each of the front and rear surface portions thereof except outer peripheral edge portions thereof and radial tape position restricting ribs are formed on tape contact flange surfaces of the upper and lower flanges. Thus, the flanges can be prevented from being warped even when the thicknesses thereof are reduced.

REFERENCES:
patent: 3236473 (1966-02-01), Hultgren
patent: 3796387 (1974-03-01), Zielke
patent: 4807826 (1989-02-01), Iwahashi
patent: 5074487 (1991-12-01), Okamura et al.

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