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US7681771: Stapler

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Filing Information

Inventor(s) Balaji Kandasamy · Mark Harris · David Kirby · Edward T. Eaton · David J. Papesh · Brian W. Matthews · Yoshiyuki Ebihara · Yuki Hamaguchi ·
Assignee(s) ACCO Brands USA LLC ·
Attorney/Agent(s) Michael Best & Friedrich LLP ·
Primary Examiner Stephen Garbe ·
Assistant Examiner Nathaniel Chukwurah ·
Application Number US11424629
Filing date 06/16/2006
Issue date 03/23/2010
Prior Publication Data
Predicted expiration date 06/16/2026
U.S. Classifications 227/134  · 227/132  · 227/120  ·
International Classifications B25C511  ·
Kind CodeB2
Related U.S. Application DataCROSS-REFERENCE TO RELATED APPLICATIONS
This application claims priority to U.S. Provisional Patent Application No. 60/705,225, filed Aug. 3, 2005, the entire content of which is incorporated by reference herein.
Foreign Priority JP2005177441 - 06/17/2005 ·
20 Claims, 27 Drawings


Abstract

A stapler movable between a rest position and a stapling position and having a front end and a rear end. The stapler includes a base, a staple magazine coupled to the base and configured to hold staples, and a driver blade operable to drive staples out of the staple magazine during stapling operations. The stapler further includes an elastic member coupled to the driver blade and operable to move the driver blade during stapling operations. The elastic member utilizes potential energy to move the driver blade during stapling operations. The driver blade is positioned above the staple magazine when the stapler is in the rest position and the magazine is extendable from the front end of the stapler to allow a user to load staples in the magazine. The stapler is configured such that only the potential energy of the elastic member can operate the driver blade during stapling operations.

Independent Claims | See all claims (20)

  1. 1. A stapler movable between a rest position, in which no force is input to the stapler by a user, and a stapling position, the stapler having a front end adjacent a staple ejection location and a rear end, the stapler comprising: a base; a staple magazine coupled to the base and configured to hold staples; a driver blade operable to drive staples out of the staple magazine during stapling operations; an elastic member coupled to the driver blade and operable to move the driver blade during stapling operations, the elastic member utilizing potential energy to move the driver blade during stapling operations; a drive link having a first end coupled to the driver blade and a second end coupled with the elastic member; and an over-center linkage having first and second link members pivotally connected together and movable between a first position in which the driver blade is prevented from driving a staple out of the staple magazine, and a second position in which the driver blade is operable to drive a staple out of the staple magazine; wherein the first and second link members are pivotally connected about a first pivot axis, the first link member is pivotally connected to the drive link about a second pivot axis, and the second link member is pivotally connected to another portion of the stapler relative to which the drive link is movable, about a third pivot axis.
  2. 13. A stapler movable between a rest position and a stapling position, the stapler having a front end adjacent a staple ejection location and a rear end, the stapler comprising: a base; a staple magazine coupled to the base and configured to hold staples; a driver blade operable to drive staples out of the staple magazine during stapling operations; an elastic member coupled to the driver blade and operable to move the driver blade during stapling operations, the elastic member utilizing potential energy to move the driver blade during stapling operations; and an over-center linkage having first and second link members pivotally connected together and movable between a first position in which the driver blade is prevented from driving a staple out of the staple magazine, and a second position in which the driver blade is operable to drive a staple out of the staple magazine; wherein the first and second link members are pivotally connected about a first pivot axis, the first link member is pivotally connected to a drive link about a second pivot axis, and the second link member is pivotally connected to another portion of the stapler relative to which the drive link is movable, about a third pivot axis; wherein the first, second, and third pivot axes are generally aligned in a straight line when the over-center linkage is in the first position; and wherein the first, second, and third pivot axes are not aligned in a straight line when the over-center linkage is in the second position.
  3. 19. A stapler comprising: a base; a staple magazine coupled to the base and configured to hold staples; a driver blade operable to drive staples out of the staple magazine during stapling operations; an elastic member coupled to the driver blade and operable to move the driver blade during stapling operations, the elastic member utilizing potential energy to move the driver blade during stapling operations; a drive link coupled with the driver blade and the elastic member, and having a pivot point about which the drive link pivots; and an over-center linkage having first and second link members pivotally connected together and movable between a first position in which the driver blade is prevented from driving a staple out of the staple magazine, and a second position in which the driver blade is operable to drive a staple out of the staple magazine; wherein the first and second link members are pivotally connected about a first pivot axis, the first link member is pivotally connected to the drive link about a second pivot axis, and the second link member is pivotally connected to another portion of the stapler relative to which the drive link is movable, about a third pivot axis; and wherein the over-center linkage is coupled with the drive link such that, when the over-center linkage is in the first position, the drive link is not allowed to pivot about the pivot point, and when the over-center linkage is in the second position, the drive link is allowed to pivot about the pivot point to drive the driver blade.

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Referenced By

Document NumberAssigneeInventorsIssue/Pub Date
US8038043 Apex Mfg. Co., Ltd. Ching-Li Wang Oct 2011
US8356738 --
US8453903 --
US8550322 --

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