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US 2007/0180970 A1Published application
Hole punch having a detached magnetic base
OwnerJohn Sinisiinventor
Life of this patent
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Abstract
A hole punch with a detached base includes a base supporting an anvil with a first magnetic element, and a punch assembly with a plunger extendable from the framework of the punch assembly. The punch assembly supports a second magnetic element positioned for magnetic coupling to the base to align the anvil with the plunger. The magnetic coupling feature eliminates throat depth limitations caused by the framework of mechanically coupled hole punches of the prior art and allows for hole placement at any desired location on any size of sheet.
Claims7
A hole punch with a detached base, comprising:
- a base supporting an anvil and a first magnetic element;
- a punch assembly structurally independent of said base and including means for extending and retracting a plunger having a cutting edge on an impact end thereof, said punch assembly supporting a second magnetic element, said second magnetic element being positioned on said punch assembly for magnetically coupling said base to said punch assembly to align said anvil with said cutting edge;
- a spring member biasing said plunger toward a retracted position, said plunger being extendable to an extended position where the cutting edge of the plunger extends through an aperture in the anvil;
- a punch assembly further including a button for applying force to the plunger along a line of force offset from said magnets;
- and
- wherein said first magnetic element comprises first and second magnets supported on said base in a spaced relationship, and wherein said second magnetic element comprises third and fourth magnets supported on said punch assembly in a corresponding spaced relationship.
3 more elements
A hole punch comprising:
- a base having an anvil and a first magnetic element;
- a framework supporting a punch assembly including a plunger having a cutting edge on an impact end thereof, said plunger being slidably affixed to said framework and movable between retracted and extended positions;
- wherein said anvil includes an aperture for receiving the cutting edge of said plunger when in the extended position;
- and
- wherein said first magnetic element is supported as on a cantilevered beam being said base.
2 more elements
Dependencies are inferred from the claim text.