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US 6,789,593 B1Granted
Hole puncher and reinforcer
AssigneeJohn Hui
InventorsIsao Aono, John Hui
Life of this patent
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AssigneeJohn Hui
InventorsIsao Aono, John Hui
Estimating the term…
A combination hole punching and reinforcing device for punching holes in sheets of paper and other sheet materials applies flat reinforcement rings about holes formed in those sheets concurrently as the holes are formed. The device employs a die punch, which is preferably configured as a disposable item that is detachable from the lower end of the punching ram. The die punch is configured with a punching tip at its lower extremity and a shank that is preferably narrower than the punching tip. A plurality of reinforcement rings are stacked one atop each other and are carried upon a shoulder formed at the demarcation between the die punch tip and the die punch shank. A transverse pressure plate located atop the shank applies pressure to sequentially affix the lowermost reinforcement ring in the stack to a sheet of paper concurrently with the formation of an aperture through that sheet. Each reinforcement ring is formed with a pressure-sensitive adhesive on its undersurface and an upper surface treated with a silicone release coating. Therefore, once each lowermost reinforcement ring is attached about an aperture formed in a sheet of paper, the remaining reinforcement rings in the stack are lifted by the die punch and detached from the lowermost ring.
A punching and reinforcement apparatus for a combination hole puncher and reinforcer for punching holes in sheets of material and for concurrently applying reinforcement to said sheets of material about said holes therein, comprising:
A punching and reinforcement apparatus for a combination hole puncher and reinforcer for punching holes in sheets of material and for concurrently applying reinforcement to said sheets of material about said holes therein, comprising:
A punching and reinforcement apparatus for a combination hole puncher and reinforcer for punching holes in sheets of material and for concurrently applying reinforcement to said sheets of material about said holes therein, comprising:
In a combination hole punching and reinforcing device for punching holes in sheets of material using a die punch and for concurrently reinforcing said sheets of material about said holes therein, the improvement wherein said die punch is configured with a punching tip at its lower extremity and a shank narrower than said punching tip projecting upwardly therefrom and a transverse pressure plate located on said shank and further comprising a plurality of reinforcement rings that have central openings therethrough slightly smaller than said punching tip and said reinforcement rings have undersurfaces coated with pressure-sensitive adhesive and are carried by said shank stacked beneath said pressure plate and above said punching tip for sequential application to said sheets of material.
A combination hole puncher and reinforcer comprising:
Dependencies are inferred from the claim text.