Stapler
AssigneeIsaberg Rapid AB
InventorsUlf Jönsson, Lars-Inge Magnusson, Frank Ambjörnsson, Trygve Gustavsson
Life of this patent
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Abstract
A stapler for stapling together a workpiece, primarily a sheaf of papers, in which the stapler comprises a stapling unit and an anvil, which interacts with the stapling unit and on which the workpiece is placed, and against which stapling is performed, which stapling unit and an anvil are, driven relative to each other in a reciprocating stapling movement, during which movement stapling takes place, the stapling unit comprises a frame and a staple cassette which houses staple blanks and which is exchangeable, and which is detachably connected to the frame by attachment devices, and the staple blanks are fed one by one to an outlet channel by a feeding device incorporated in the stapler.
Claims23
A stapler for stapling together a workpiece, comprising:
- a stapling unit;
- and
- an anvil, which interacts with the stapling unit, on which the workpiece is placed, and against which stapling is performed,
- the stapling unit and the anvil being driven relative to each other in a reciprocating stapling movement by a drive mechanism, during which movement stapling takes place,
- wherein the stapling unit includes a frame and a staple cassette, the staple cassette housing staple blanks, being exchangeable, and being detachably attached to the frame by attachment devices,
- wherein the staple blanks are fed one by one to an outlet channel by a feeding device incorporated in the stapler, a staple which has been fed and formed into staple shape during the stapling movement being driven through the outlet channel by a blade-shaped driver so as to staple the workpiece, the driver being driven by drive links driven by the drive mechanism and acting on a crown of the formed staple,
- wherein the outlet channel is, in a direction which is transverse to a longitudinal direction of the crown of the formed staple, defined by a first guide surface and a second guide surface, the first guide surface having a first face disposed on the staple cassette, the second guide surface having a second face disposed on the frame, the first and second faces guiding the formed staple as it is driven through the outlet channel, a clearance between the first and second faces being determined by spacing elements,
- wherein at least one of the first and second guide surfaces is movable toward and away from the other of the first and second guide surfaces and is biased toward the other by one or more elastic elements.
A stapling unit comprising:
- a frame;
- and
- a staple cassette, which holds staple blanks and is releasably attached to the frame so as to be replaceable, the staple blanks being fed from the staple cassette to an outlet channel,
- the outlet channel guiding a formed staple blank to a workpiece to be stapled during a stapling motion and being formed by a surface of the staple cassette and a surface of the frame opposed thereto,
- wherein at least one of said surface of the staple cassette and said surface of the frame is elastically biased toward the other, and a minimum distance between said surface of the staple cassette and said surface of the frame is set by one or more spacers.
A stapler for stapling together a workpiece, the stapler comprising:
- a frame constructed to releasably support a staple cassette, which holds staple blanks, such that an outlet channel is formed by a surface of the frame and an opposing surface of the staple cassette, the outlet channel guiding a formed staple blank to the workpiece during a stapling motion,
- wherein said surface of the frame is elastically biased toward said opposing surface of the staple cassette when the staple cassette is supported by the frame, and
- a forming block is biased toward said opposing surface of the staple cassette.
Dependencies are inferred from the claim text.