Fastener assembly for a file

Details Fastener assembly for a file Fastener assembly for a file

1996-01-08

1998-09-22

Fridie, Jr., Willmon

Binder device releasably engaging aperture or notch of sheet

Pliant, deformable sheet retainer

Secured by folded portion thereof

402 8, 402 60, B42F 1306

Patent

active

058104984

ABSTRACT:
A file having a polypropyrene base sheet and a fastener assembly that includes a polypropyrene base member thermally bonded to the polypropyrene base sheet. A relatively thin polypropyrene sheet, such as a polypropyrene sheet having a thickness of about 0.3 mm or less, is sturdy and is used, thus securing a large mechanical strength to support the fastener assembly. The polypropyrene base member is bonded to a relatively thin polypropyrene base sheet by an ultrasonic bonding. The ultrasonic bonding achieves a strong connection between the polypropyrene member and the relatively thin polypropyrene sheet.

REFERENCES:
patent: 1930648 (1933-10-01), Kline
patent: 2182058 (1939-12-01), Ross
patent: 2302035 (1942-11-01), Karlen
patent: 4993861 (1991-02-01), Blumberg et al.

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