Stapler with sheath control mechanism
AssigneeAcco USA, Inc.
InventorsSarwan A. Jairam, Frank H. F. Lin
Life of this patent
Estimating the term…
Abstract
A stapler in which the sheath is held in fixed operable position by a pin during operation with the sheath configured to assure such holding. Sheath opening is accomplished by action of a separate release lever which releases with ease the sheath from the pin.
Claims10
In a stapler having a head and a sheath positioned adjacent the head to form a staple driving transport channel and having adjacent said channel a removable staple blank cartridge to feed staples to said channel, the improvement comprising
- (a) pivot means on the head and sheath for pivotal movement of the sheath with respect to the head;
- (b) first latch means on the sheath;
- (c) second latch means on the head for engaging the first latch means, said second latch means in turn comprising an opening in the head having a top surface and a bottom surface, a latch pin positioned in the opening and a spring urging such pin toward the top surface.
In a stapler having a head and a sheath positioned adjacent the head to form a staple driving transport channel and having adjacent said channel a removable staple blank cartridge to feed staples to said channel, the improvement comprising
- (a) pivot means on the head and sheath for pivotal movement of the sheath with respect to the head;
- (b) first latch means on the sheath, said first latch means including hook means and a pin in which said hook means engages the pin at a steep angle such that a first force is required to be applied to the sheath to release the sheath;
- (c) second latch means on the head for engaging the first latch means;
- (d) a release lever also pivotally mounted on the head and surrounding the sheath which lever when rotated, engages the second latch means to release the sheath, said release lever includes projection means which engages said pin at a shallow angle such that when a second force smaller than the first force is applied to the lever, said pin is depressed to release the sheath.
In a stapler having a head and a sheath positioned adjacent the head to form a staple driving transport channel and having adjacent said channel a removable staple blank cartridge to feed staples to said channel, the improvement comprising
- (a) pivot means on the head and sheath for pivotal movement of the sheath with respect to the head;
- (b) first latch means on the sheath;
- (c) second latch means on the head for engaging the first latch means;
- said first and second latch means holding the sheath in operating position relatively to the head and capable of disengaging when a first force is applied to the sheath;
- (d) a release lever also pivotally mounted on the head and surrounding the sheath;
- which lever, when a force different form the first force is applied, causes disengagement of said first and second latch means to release the sheath.
Dependencies are inferred from the claim text.