Binder device releasably engaging aperture or notch of sheet – Resilient sheet retainer requiring deflection for sheet removal – Releasably attached to keeper
Patent
1995-03-03
1997-04-08
Fridie, Jr., Willmon
Binder device releasably engaging aperture or notch of sheet
Resilient sheet retainer requiring deflection for sheet removal
Releasably attached to keeper
402 31, B42F 302
Patent
active
056181221
ABSTRACT:
A molded plastic one-piece loose-leaf ring binder for use in binding loose perforated sheets, book pages and the like. A plastic elongated base strip is ridgidified by ribs extending longitudinally thereof, and has paired integral flexible lugs spaced longitudinally on opposite longitudinal sides of the base strip and extending laterally therefrom. The individual lugs each have an integral arm curved along a length of the arm extending laterally away from the corresponding lug and side of the base strip and each curves in a direction back toward the strip. The curved arms have a cross-section thickness greater than the thickness of the corresponding lug so that their curvature is maintained. The curved arms are paired on opposite sides of the strip and are sufficiently rigid as ring-forming elements insertable into holes of perforated sheets and free ends thereof of a pair locked together to define binder rings. The flexible paired lugs each form a hinge for corresponding paired curved arms on opposite sides of the strip to be manually biased toward each other and free-end portions thereof positioned in overlying relationship for manual pressing of the overlying free-end portions together to close an integral snap lock formed thereon. The snap lock formed by a rigid radial projection on an end portion of a curved arm of a pair is received in a hole on a tongue on a free-end portion of the other curved arm of the corresponding pair and is opened by pressing the curved arm with the projection thereon away from the tongue of the arm in which the projection is received.
REFERENCES:
patent: 2363848 (1944-11-01), Emmer
patent: 2399561 (1946-04-01), Murphy
patent: 3315682 (1967-04-01), Bachman
patent: 4577985 (1986-03-01), Beyer
patent: 5160209 (1992-11-01), Schuessler
C-Lock Inc.
Fridie Jr. Willmon
LandOfFree
Molded plastic one-piece loose-leaf binder ring structure does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Molded plastic one-piece loose-leaf binder ring structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Molded plastic one-piece loose-leaf binder ring structure will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2394303