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US 4,906,157 AGranted
Bending apparatus for flexible studs of bookbinding strips
AssigneeVeloBind, Inc.
InventorsFrank A. Todaro, Keith Holmes
Life of this patent
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AssigneeVeloBind, Inc.
InventorsFrank A. Todaro, Keith Holmes
Estimating the term…
One type of bookbinding strip consists of a male strip with plural flexible studs projecting therefrom and a female strip with complementary holes and grooves in the outer surface thereof extending from each hole. The studs are inserted through holes in the punched paper, then through the holes in the female strip. The present invention compresses the strips toward each other with the paper therebetween and then, upon manual actuation of a lever, causes blocks carrying rollers to bend 90.degree. the portion of the studs projecting beyond the female strip, causing these portions to snap into the grooves. Since the grooves on each end of the strip extend toward the middle of the strip, two blocks are used, each moving inward toward the center upon actuation of the lever.
A machine for binding flexible studs projecting from a first strip placed on one side of an edge of a stack of perforated sheets wherein said studs pass through perforations in said sheets and through holes in a second strip placed on the side of said stack opposite said first strip comprising
Dependencies are inferred from the claim text.