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US 6,301,791 B1Granted
Sharpener for soft-core pencils
AssigneeKUM Limited
InventorFritz Lüttgens
Life of this patent
Estimating the term…
Abstract
A sharpener for soft-core pencils includes a core shaper with a shaping edge for shaping the core tip, the edge being positioned in the free space in front of the pencil-guiding channel. This shaping edge is a part of a detachably-secured, separate insert, which limits the free space at the rear housing side, and supports the shaping edge on its side facing the guide channel.
Claims14
A sharpener for sharpening an end of a pencil having a soft core, the sharpener comprising:
- a housing body defining a free space and a conical guide channel for receiving and centering the pencil end, the guide channel being tapered towards a front end thereof, and having a side opening;
- said housing body having a rear side;
- a sharpening blade dispensed along said side opening for sharpening the pencil end into a conical shape;
- and
- an exchangeable insert secured in the free space of said housing body in front of the front end of the guide channel, said insert having a shaping edge for shaping the pencil core, and said shaping edge facing the guide channel and being spaced from said sharpening blade;
- said insert forming a limiting wall that closes the free space at the housing body rear side.
3 more elements
A sharpener for sharpening an end of a pencil having a soft core, the sharpener comprising:
- a housing body defining a free space and a conical guide channel for receiving and centering the pencil end, the guide channel being tapered towards a front end thereof, and having a side opening;
- said housing body having a housing body underside;
- a sharpening blade dispensed along said side opening for sharpening the pencil end into a conical shape;
- said free space being open toward the housing body underside in a direction facing away from the sharpening blade;
- and
- an exchangeable insert secured in the free space of said housing body in front of the front end of the guide channel, said insert having a shaping edge for shaping the pencil core, and said shaping edge facing the guide channel and being spaced from said sharpening blade;
- said insert being inserted into the free space from the housing body underside.
4 more elements
A sharpener for sharpening an end of a pencil having a soft core, the sharpener comprising:
- a housing body defining a free space and a conical guide channel for receiving and centering the pencil end, the guide channel being tapered towards a front end thereof, and having a side opening;
- a sharpening blade dispensed along said side opening for sharpening the pencil end into a conical shape;
- an exchangeable insert secured in the free space of said housing body in front of the front end of the guide channel, said insert having a shaping edge for shaping the pencil core, and said shaping edge facing the guide channel and being spaced from said sharpening blade;
- said insert being adjustable in an axial direction of the guide channel inside the free space of the housing body;
- and
- means for securing said insert at different axial distances from the guide channel.
3 more elements
A sharpener for sharpening an end of a pencil having a soft core, the sharpener comprising:
- a housing body defining a free space and a conical guide channel for receiving and centering the pencil end, the guide channel being tapered towards a front end thereof, and having a side opening;
- a sharpening blade dispensed along said side opening for sharpening the pencil end into a conical shape;
- and
- an exchangeable insert secured in the free space of said housing body in front of the front end of the guide channel, said insert having a shaping edge for shaping the pencil core, and said shaping edge facing the guide channel and being spaced from said sharpening blade;
- said insert being adjustable at infinitely-variable different axial distances inside the free space of said housing body.
2 more elements
A sharpener for sharpening an end of a pencil having a soft core, the sharpener comprising:
- a housing body defining a free space and a conical guide channel for receiving and centering the pencil end, the guide channel being tapered towards a front end thereof, and having a side opening;
- a sharpening blade dispensed along said side opening for sharpening the pencil end into a conical shape;
- an exchangeable insert secured in the free space of said housing body in front of the front end of the guide channel, said insert having a shaping edge for shaping the pencil core, and said shaping edge facing the guide channel and being spaced from said sharpening blade;
- wherein said insert extends over an entire width of the free space;
- and
- a scraping rib supporting said shaping edge of said insert;
- said scraping rib having a scraping rib underside facing away from the sharpening blade that forms a tray-like surface for catching the shavings of the soft pencil core.
4 more elements
A sharpener for sharpening an end of a pencil having a soft core, the sharpener comprising:
- a housing body defining a free space and a conical guide channel for receiving and centering the pencil end, the guide channel being tapered towards a front end thereof, and having a side opening;
- said housing body having a top side;
- a sharpening blade dispensed along said side opening for sharpening the pencil end into a conical shape;
- and
- an exchangeable insert secured in the free space of said housing body in front of the front end of the guide channel, said insert having a shaping edge for shaping the pencil core, and said shaping edge facing the guide channel and being spaced from said sharpening blade;
- said insert having a handling projection extending beyond the housing body top side for facilitating removal of said insert from the free space;
- said handling projection being positioned on a side of said insert that faces away from said sharpening blade and projecting upward beyond said housing body.
4 more elements
A sharpener for sharpening an end of a pencil having a soft core, the sharpener comprising:
- a housing body defining a free space and a conical guide channel for receiving and centering the pencil end, the guide channel being tapered towards a front end thereof, and having a side opening;
- a sharpening blade dispensed along said side opening for sharpening the pencil end into a conical shape;
- an exchangeable insert secured in the free space of said housing body in front of the front end of the guide channel, said insert having a shaping edge for shaping the pencil core, and said shaping edge facing the guide channel and being spaced from said sharpening blade;
- said insert having a jacket comprising at least a pair of diametrically-opposite shaping edges having different shaping contours;
- and
- means for converting an orientation of said shaping edges in the free space so that said shaping edges are selectively brought into an operational position.
3 more elements
A sharpener for sharpening an end of a pencil having a soft core, the sharpener comprising:
- a housing body defining a free space and a conical guide channel for receiving and centering the pencil end, the guide channel being tapered towards a front end thereof, and having a side opening;
- a sharpening blade dispensed along said side opening for sharpening the pencil end into a conical shape;
- and
- an exchangeable insert secured in the free space of said housing body in front of the front end of the guide channel, said insert having a shaping edge for shaping the pencil core, and said shaping edge facing the guide channel and being spaced from said sharpening blade;
- there being provided a plurality of inserts having different shaping edges, said inserts being color-coded for distinction from each other.
2 more elements
Dependencies are inferred from the claim text.