Low-effort, two-stage stapler

Details Low-effort, two-stage stapler Low-effort, two-stage stapler

2009-09-08

2011-12-20

Low, Lindsay (Department: 3721)

Elongated-member-driving apparatus

With means to move or guide member into driving position

Including supply magazine for constantly urged members

C227S155000, C227S156000

Reexamination Certificate

active

08079505

ABSTRACT:
A stapler comprises an upper assembly for driving a staple through a stack of papers to be bound, and a lower assembly with a staple anvil for clinching the staples only after the staples are completely driven through the papers. The staple anvil is kept clear of the effort to drive in the staples by a risen table that is allowed to drop around the staple anvil in a second stage of operation. The upper assembly and a handle for the user are provided that are arranged to give the user a 2:1 mechanical advantage with a lever arrangement.

REFERENCES:
patent: 5758813 (1998-06-01), Kikuchi et al.
patent: 6981626 (2006-01-01), Tsai
patent: 7108165 (2006-09-01), Tsai
patent: 7124924 (2006-10-01), Marks

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