Document folder

Details Document folder Document folder

1993-01-07

1994-02-15

Moy, Joseph Man-Fu

Envelopes, wrappers, and paperboard boxes

Paperboard box

Box material includes a coating or a nonpaperboard...

281 28, 281 45, B42D 310

Patent

active

052859525

ABSTRACT:
A document folder includes an upper sheet, a lower sheet and an elongated folding portion which interconnects the upper and lower sheets. A generally C-shaped clamp has an upper clamping plate, a lower clamping plate and a curved portion which interconnects the upper and lower clamping plates. Two protrusions extend oppositely from the free edge of the lower clamping plate. Two parallel slits are formed in the lower sheet of the document folder adjacent to the folding portion of the document folder. The protrusions of the lower clamping plate of the C-shaped clamp are slidably and respectively received in the slits

REFERENCES:
patent: 2883989 (1959-04-01), Ulrich, Jr.
patent: 3779393 (1973-12-01), Grundell
patent: 4904104 (1990-02-01), Gloeckie
patent: 5226676 (1993-07-01), Su

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