WO2002068215A1 - Anspitzer - Google Patents
Anspitzer Download PDFInfo
- Publication number
- WO2002068215A1 WO2002068215A1 PCT/EP2002/001972 EP0201972W WO02068215A1 WO 2002068215 A1 WO2002068215 A1 WO 2002068215A1 EP 0201972 W EP0201972 W EP 0201972W WO 02068215 A1 WO02068215 A1 WO 02068215A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- housing
- cam
- guide
- sharpener according
- pin
- Prior art date
Links
- 238000007789 sealing Methods 0.000 claims description 19
- 229920003023 plastic Polymers 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 3
- 239000002537 cosmetic Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000003993 interaction Effects 0.000 description 3
- 229910000760 Hardened steel Inorganic materials 0.000 description 2
- 230000001427 coherent effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920005176 Hostaform® Polymers 0.000 description 1
- 235000010678 Paulownia tomentosa Nutrition 0.000 description 1
- 240000002834 Paulownia tomentosa Species 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 239000013641 positive control Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L3/00—Writing or drawing underlays, e.g. blotting pads
- B43L3/008—Writing or drawing underlays, e.g. blotting pads with supporting means
Definitions
- the invention relates to a sharpener for pencils which have a lead, such as pencils, colored pencils and in particular cosmetic pencils and the like.
- These known sharpener can be used to sharpen pens with a substantially cylindrical lead, in which a carrier body encases this lead, which is usually made of wood and has a circular or hexagonal cross section.
- the invention is therefore based on the object of providing a sharpener for sharpening pencils which is of a different technical design.
- the invention is the The object of the present invention is to create a sharpener for sharpening pencils, by means of which pencils with essentially any cross section of the carrier body and the lead can be sharpened in a reliable manner.
- the object is achieved by a sharpener according to claim 1.
- a pencil sharpener which has a cutting device, a holding device for the pin, at least one housing and a positive guidance device.
- the pin is received in particular by the holding device.
- the holding device preferably encompasses the pin on its outer circumference.
- the holding device is arranged within the sharpener in such a way that a free end of the pin which is to be sharpened is located outside the holding device, so that it can contact the cutting device.
- the pin is preferably held in a rotationally fixed manner within the holding device, so that rotation about an axis parallel to its longitudinal axis is prevented.
- the pin to be pointed is particularly preferably received in a form-fitting manner in the holding device.
- the pin is preferably mounted in the holding device so as to be axially displaceable with respect to its longitudinal axis, so that it can be moved in the direction of the cutting device.
- the housing preferably has at least two housing parts, of which one housing part is a cover.
- the housing parts are connected to each other.
- the housings set parts welded together, in particular ultrasonically welded, glued or screwed.
- the positive guidance device has at least one guide element and at least one guide path, in which the guide element is positively guided when the pin is pointed.
- the guideway is in particular formed by a cam disc or has one.
- the guideway is particularly preferably formed by a courage. It is preferred that the guideway is formed by a profiling.
- the guideway is particularly preferably formed by a groove which has a constant or varying groove depth. A positive guidance realized by means of a varying groove depth or a positive guidance realized by means of the groove course or the combination of these positive guidance is particularly preferred according to the invention.
- a disc extending concentrically around the Gareinrich- ⁇ tung, which 'can hold / wherein -' the pin is a groove having a varying along the circumference groove depth provided on "the outer circumference of this disc, so that at least a guide pin firmly connected to the housing engages in this groove and changes the position of the pin or the holding device relative to the housing in accordance with a predetermined characteristic.
- grooves are arranged on one or both end faces of a disk which extends concentrically around the holding device and into which guide pins firmly connected to the housing engage, these grooves being identical in terms of their course or at least differing in terms of their course.
- the guideway or ' the groove is a closed path.
- the guide element is particularly preferably designed as a guide pin, which is guided in particular in a groove.
- a plurality of differently shaped guideways are preferably provided.
- a suitable selection of the guide grooves can ensure that the position of the lead relative to the knife is optimal, and in particular that the clearance angle that is required for a good cut is in the optimum range in each case.
- a sharpener according to the invention can be used in particular for pencils which have a lead of essentially any shape in cross section.
- This mine can in particular be non-rotationally symmetrical.
- the cross section of this lead is preferably elliptical.
- the mine carrier can likewise have an essentially arbitrary cross-sectional area and in particular be elliptical.
- a sharpener according to the invention in particular in accordance with the design of its positive guidance device, can be used for a large number of further forms of the mine carrier, which is in particular a wooden casing which extends essentially along the mine axis and which extends around the mine and thus in particular also protects it become.
- two grooves are provided on the respective end faces, each of which is used to guide a pin which is fixedly mounted in the housing.
- the cutting device in particular the cutting edge, is particularly preferably arranged fixedly with respect to the housing.
- "S ⁇ ders - preferably the cutting edge is " "- " fixed - with the housing " - vexToühden, which is produced in particular by means of a screw connection or the like.
- the pin is preferably received in the holding device in a rotationally fixed manner with respect to its longitudinal axis, the holding device, ie also the pin, being arranged so as to be movable relative to the cutting device.
- the pin is preferably received in a form-fitting manner in the holding device.
- the pin is preferably received in an axially displaceable manner in the holding device so that it moves in the direction of the cutting insert. direction can be shifted and the cutting surface of the pin can be shaped by means of a rotary movement of the pin relative to the cutting device.
- the positive guide device or the course of the groove in which a pin engages, or the cam disc is designed in such a way that the clearance angle when pointed is always between 2 ° and 10 °, preferably essentially between 3 ° and 5 °, particularly preferably 3 °.
- the clearance angle is preferably kept constant during the 'pointing of the pen. It is also preferred that the clearance angle is within an interval of 1 ° when sharpening.
- the sharpener preferably has a sealing device.
- This sealing device seals the guideways in particular, so that the guiding behavior is not impaired by penetrating materials such as chips or the like.
- the sealing washer is made in particular from a material which -pöM * and / or - 'polyamide-or -Derdn or H ⁇ staföri ⁇ V ' - ' ⁇ " ; -ge ⁇ - ' -, where Derin and Hostaform are product names.
- the sharpener has, in particular, a guideway which enables an elliptical pen with ellipse ratios of essentially 1.3: 1 to 1.6: 1 to be sharpened with a substantially constant clearance angle.
- the ellipse ratio of the pin is particularly preferably essentially 1.45: 1.
- Other ellipse ratios as well as other forms of the pin are also preferred according to the invention.
- the sharpener preferably has a container which collects the chips that arise during the sharpening.
- a container which collects the chips that arise during the sharpening.
- Such a design for example as a collecting hood or chip collecting hood, tes container essentially adjoins the cutting edge and is particularly transparent.
- the guide disk is preferably guided between two flat surfaces, one of which. Prevent movement of the guide disc in the axial direction, i.e. perpendicular to the flat surface.
- An opening in the outer wall of the housing, through which a pin is inserted into the housing for tipping, is preferably at least partially covered by a cover, which is in particular designed as a disk.
- This cover is spring-loaded against the housing from the inside of the housing.
- the cover has a through opening through which the pin and possibly part of a guide device for this pin extends.
- the through opening is dimensioned in such a way that the mounting device or the pin contacts the wall of this through opening.
- the housing in the area of the opening through which the pin is inserted at the peaks and in which it is moved perpendicularly to its longitudinal axis at the peaks in the 'we' seritlichen ' "äbpendicularly to its longitudinal axis at the peaks in the 'we' seritlichen ' "äbpendicularly to its longitudinal axis at the peaks in the 'we' seritlichen ' "äbpendicularly to its longitudinal axis at the peaks in the 'we' seritlichen ' "äbpendicularly to its longitudinal axis at the peaks in the 'we' seritlichen ' "äbpendicularly to its longitudinal axis at the peaks in the 'we' seritlichen ' "äbpendicularly to its longitudinal axis at the peaks in the 'we' seritlichen ' "äbpendicularly to its longitudinal axis at the peaks in the 'we' seritlichen ' "äbpendicularly
- the sharpener is preferably at least partially made of a high-quality plastic, such as POM.
- a high-quality plastic such as POM.
- the guideway and / or the holding device and / or the guide pin and / or the container are made of a (high-quality) plastic.
- the cutting device or the knife is preferably made of hardened steel.
- the holding device has the guide sleeve.
- the holding device is particularly preferably the rotary insert, or vice versa.
- the sharpener has a rotary insert which has a guide sleeve with a wall section which extends in the circumferential direction. This wall section delimits a cavity in which the pin can be received, in particular in a form-fitting manner, during the point.
- the rotary insert also has a support section, via which this rotary insert can be supported in the axial direction.
- the support section is preferably designed such that it extends in the radial direction.
- the guide sleeve preferably has a varying wall thickness in the circumferential direction.
- the wall thickness of the guide sleeve is particularly preferably essentially constant in the axial direction.
- the lau- - the wall thickness - the guide sleeve - n - circumferential direction - preferably affects the shape of the pin to be sharpened.
- the support section is particularly preferably arranged axially at the end of the guide sleeve.
- the support section is preferably supported on a housing section, in particular in the axial direction.
- the support section is preferably supported in the axial direction on a substantially radially extending housing wall section.
- a housing insert is preferably provided, which is particularly preferably designed in several parts, for example in two parts.
- the housing insert can be designed in such a way that it has a division plane which is oriented essentially perpendicular to the longitudinal axis.
- at least three cam guide surfaces arranged on or in the housing insert.
- the housing insert is designed in two parts. and at least one cam guide surface is arranged on each of these parts on the side facing the housing interior.
- the housing insert has a radially extending wall section axially on both sides, each of which is provided with a through opening.
- the guide sleeve can extend through this through opening. At least one boundary wall of these through openings acts particularly preferably as a cam guide surface.
- cam disks which are axially adjacent, are particularly preferably provided.
- At least one cam disk or one cam disk set has -e-ine- ⁇ ffnu-ng-'? -which in " spiel-swei” se “” ei " ne "” is a through opening and extends radially inward in the axial direction.
- the guide sleeve can be inserted through this opening.
- This opening is preferably designed in such a way that the guide sleeve in it is form-fitting , in particular rotatably, can be recorded.
- At least three cams are preferably connected to one another in one piece.
- At least three cams are integrally connected to the guide sleeve.
- the housing is preferably sealed, in particular at the end. For this purpose, one or more seals can be provided.
- At least two cam disk guides are arranged at an angle of 120 ° to one another.
- cam disk guides are arranged at an angle of 60 ° to one another.
- the cam disk guides are preferably flat, at least two cam disk guides being provided, the normals of which enclose an angle of 120 °.
- Figure 1 shows a first exemplary embodiment of the invention in a schematic, partially sectioned view.
- FIG. 2 shows a first sectional view of the representation according to FIG. 1;
- FIG. 3 shows a second sectional view of the representation according to FIG. 1 ;
- Fig. 4 shows the position of the knife edge in a first position of the pencil.
- FIG. 8 shows a second exemplary embodiment of the invention in a schematic, partially sectioned view
- Fig. 9 is a sectional view taken along line 9-9 of Fig. 8;
- FIG. 10 shows a side view from the direction of arrow 126 from FIG. 8;
- Fig. 11 is a sectional view taken along the line 11-11 of Fig. 10;
- Fig. 13 is a sectional view as seen from line 13-13 in Fig. 12;
- Fig. 14 is a sectional view as seen from line 14-14 in Fig. 12;
- Fig. 15 is a sectional view as seen from line 15-15 in Fig. 12;
- Fig. 16 is a sectional view as seen from line 16-16 in Fig. 12;
- Fig. 17 is a sectional view as seen from line 17-17 in Fig. 12;
- FIG. 18 shows an exemplary embodiment according to the invention in a schematic representation
- Fig. 19 is a sectional view as seen from line 19-19 in Fig. 18;
- Fig. 20 is a sectional view seen from line 20-20 in Fig. 18;
- Fig. 21 is a sectional view seen from the line 21-21 in Fig. 18;
- Fig. 22 is a sectional view as seen from line 22-22 in Fig. 18;
- Fig. 24 is a sectional view seen from line 24-24 in Fig. 23;
- Fig. 25 is a sectional view as seen from line 25-25 in Fig. 23;
- Fig. 26 is a sectional view as seen from line 26-26 in Fig. 23;
- Fig. 27 is a sectional view as seen from line 27-27 in Fig. 23;
- Fig. 29 is a sectional view as seen from line 29-29 in Fig. 28;
- Fig. 30 is a sectional view as seen from line 30-30 in Fig. 28;
- Fig. 31 is a sectional view as seen from line 31-31 in Fig. 28;
- Fig. 32 is a sectional view as seen from line 32-32 in Fig. 28;
- FIG. 1 shows an exemplary embodiment of the pencil sharpener 1 according to the invention, which is intended to provide essentially elliptical cosmetic pencils with an essentially chisel-shaped tip.
- the sharpener has a housing which is identified overall by the reference number 10.
- the case has a weave-like look.
- cylindrical section 10a which is partially covered by an annular plate 10b.
- a substantially conical taper 10c is formed on this annular plate 10b, to which a hardened knife edge 12 made of hardened steel is fastened by means of a screw 11.
- the knife edge is designed in a conventional manner, which means that it is essentially designed as a flat plate which has a cutting edge 12b and a tip 12c on the surface facing the edge (FIG. 4).
- the inner cylindrical space 10d of the housing 10 is closed with a housing cover 13 which is essentially annular. is formed "and is attached to the housing 10 with screws 13a which engage in threaded holes 10e in the housing.
- a holding device Arranged within the housing is a holding device, which is designated overall by 14.
- the holding device 14 consists of a first, the contour of the matched pencil to be sharpened tubular holding portion 14a and a substantially disk-like portion 14b, the upstream 'are preferably connected integrally to one another.
- the holding device 14 is received in the cylindrical cavity 10a of the housing 10 in such a way that the holding device can rotate relative to the housing.
- tubular extension 14a is designed in such a way that at least the inner contour of the outer contour of a pin 16 with a longitudinal axis 18 is adapted.
- the disk-shaped part 14b of the holding device has a first end face 22 and a second end face 24.
- a first groove 26 is provided in the first end face 22 and a second groove 28 in the second end face 24.
- the dimensions of the first and second grooves 26, 28 and the first 30 and the second pin 32 are selected so that the pins can slide in the grooves.
- a sealing disk 34 is also provided, which preferably consists of a plastic and is provided between the disk-shaped part 14b and the cover 13. This groove serves for sealing and also facilitates the movement of the annular part 14b.
- an essentially conical, cup-shaped container 36 is provided, which is placed on an extension 10g of the circular disk-shaped part 10b.
- This container is preferably made of plastic, particularly preferably of ' transparent plastic.
- FIG. 2 shows a partially sectioned view along the line 2-2 in FIG. 1. Here the shape of the groove 28 can be clearly seen.
- FIG 3 shows a further sectional view, from which the shape of the groove 26 emerges.
- the shape of the groove or the grooves is determined in particular by a back calculation from the desired rolling movement during the point.
- the first groove 26 is essentially elliptical, the elliptical configuration essentially corresponding to the elliptical configuration of the corresponding opening of the tubular extension 14a of the holding device.
- the curved path 26 is essentially elliptical-concentric to the elliptical contour of the pin 16.
- the second groove is also essentially approximately elliptical, but, roughly speaking, the ellipse here is tilted at an angle of 45 °.
- the ellipse is tilted at an angle of 45 °.
- the disc-shaped extension 14b of the holding device 14 Since the circular disc-shaped extension 14b of the holding device 14 is held between the disc-shaped extension 10b of the housing and the housing cover 13, it cannot move in one direction along the axis 18 of the pin. With respect to the housing 10, therefore, the disc-shaped extension 14b executes a flat movement.
- the movement of a body can be represented as the sum of a translational movement with a rotational movement about the respective current axis of rotation. In the case of a planar movement, as in the present case, this results in a total of three degrees of freedom, namely two possibilities of movement in the X and Y planes (which are not shown and which would extend here perpendicular to the axis 18), and a rotational movement.
- the knife 12 is arranged such that it lies with a clearance angle 40 on the tip of the pin to be shaped.
- the pin 16 is rotated, as shown in FIGS. 4 to 7, the pin 16 is moved up and down or along the arrow direction 52 in such a way that this clearance angle is maintained in all positions of the pin.
- this ensures that the tip of the pin achieves exactly the predetermined shape, in the present case a chisel-shaped tip.
- the constant clearance angle ensures that the cutting result is uniform and that no pressure is exerted vertically on the pin (as viewed in the direction of the illustration in FIGS. 4 to 7) during the cutting.
- the chisel-shaped tip on an elliptical pen is the preferred application of the present invention.
- the solution according to the invention makes it possible to implement a wide variety of shapes which can be achieved by the linear superimposition of two curved paths at two fixed points, that is to say the pins.
- Fig. 8 shows a second exemplary embodiment of the invention in a schematic representation.
- the sharpener 1 comprises' a housing 10 to which is attached removably a lid 60th
- the housing 10 has a thin-walled outer wall 62.
- a first intermediate part 64 and a second intermediate part 66 are arranged within the thin-walled outer wall 62 within the housing .10.
- the first 64 and the second intermediate part 66 each have an essentially flat region 68, 70 which extends essentially perpendicular to the longitudinal axis 72 of a channel 74, which is arranged within the holding device 14 and serves to receive a pin 16 to be sharpened.
- the first 64 and the second intermediate part 66 are accommodated in the housing in a rotationally fixed manner with respect to the longitudinal axis 72.
- the first 42 and the second intermediate part 66 each have a flange 76, 78 which extends in the outer region 80, 82 from a plate 80, 86 having the flat region 68 and 70, respectively, perpendicular to the flat region 68, 70.
- the circumferential flanges 76, 78 bear against the outer wall 62.
- To "the plate” 86 'abgewa ⁇ dte " ⁇ end face" "92' of the ⁇ zwelten” intermediate part 96 abuts against the first intermediate part 64 from.
- the plate 84 of the first intermediate part 64 and the plate- 86 of the second intermediate part 66 each have a has an essentially circular opening 94, 96.
- an extension 98 with a cylindrical part 100 and a conical part 102 formed thereon extends from the plate 84 in the direction facing away from the second intermediate part 66 the cylindrical part 100 and the conical part 102 are each hollow.
- the conical part 102 has an opening 104, which the inside of the conical part 102 connects to the interior of the cover 60.
- a knife edge 12 is mounted on the shoulder 98 by means of a screw 11 at an angle to the longitudinal axis 72.
- a cam disk 20 extends parallel to the flat regions 68, 66, which contacts the first 64 and the second intermediate part .66 and is rotatable with respect to the longitudinal axis 72 relative to the first intermediate part 64 and the second intermediate part 66 is arranged.
- the ' cam 20 has on its two end faces 22, 24, which contact the first intermediate part 64 and the second intermediate part 66, respectively circumferential grooves 26, 28, which are arranged asymmetrically with respect to a plane spanned by the cam 20.
- the cam disc 20 has a through opening 106. Of the cam 20 * is formed around these through-aperture on the side facing away from the first intermediate portion 64 side, a tubular extension 14a arrival, which extends through the opening 96 of the plate 86 of the second intermediate part 66th
- the plate 86 of the second intermediate part 66 also has, on its side facing away from the first intermediate part 64, a flange 108 which extends perpendicularly to the planar region 68 and is designed in particular all around, and for supporting the spring element 110 which is in particular designed as a spiral spring and is supported against the second intermediate part 66, serves. With its second end 112, the field element 110 is supported against a disk 114 with a circumferential flange 116 from. This disc 114 ' has a through opening 118 adapted to the outer contour of the tubular extension 14a, through which this tubular extension 14a extends.
- the disk 114 extends essentially perpendicular to the longitudinal axis 72 and is supported with its end face facing away from the field element 110 against the housing 10.
- the housing 10 has in particular a tubular extension 122 which extends around the longitudinal axis 22.
- the disk covers an opening 124 which extends in the outer wall 62 of the housing 10 and has an opening area which is larger than the area defined by the outer circumference of the tubular extension 14a.
- FIG. 9 shows a sectional illustration along the line 9-9 from FIG. 8.
- FIG. 10 shows a side view from the direction of arrow 126 from FIG. 8th.
- I -Fig. 10 - is particularly clarified -, - that the disc 114 is arranged in the direction perpendicular to the longitudinal axis 72 in relation to the housing 10 or the tubular extension 122 of the Ge r housing 10 is arranged.
- the respective position of the disc 114 relative to the housing 10 is determined in particular by the relative position of the pin 16 or the tubular extension 14a or the cam disc 20 relative to the housing 10.
- the disc 114 pressed against the housing 10 under the action of the field element 110 follows the plane perpendicular to the longitudinal axis 72, in particular the movement of the tubular extension 14a, since its through-hole lies against the tubular extension from the outside.
- the field element 110 prevents the disk 114 from falling off the housing 10 and enables other on the one hand, a flexible mobility of the disk 114 corresponding to the mobility of the tubular extension 14a.
- FIG. 11 shows a sectional view along the line 11-11 from FIG. 10.
- FIG. 12 shows an exemplary embodiment of a sharpener according to the invention.
- the sharpener 100 has a cap 102, a housing 103, a housing insert 108 and a rotary insert 110.
- FIG. 12 a pin 116 with a longitudinal axis 118 is shown in FIG. 12, which extends into the sharpener 100. This pin 116 is not part of the sharpener 100 itself.
- the housing 103 is designed in several pieces and has a first housing part 104 and a second housing part 106.
- the first housing part 104 is inserted into the second housing part 106 and is supported with the outer surface 2QQ of its first wall section 202 on the inner surface 204 of the second housing part 106.
- a second cam disk guide 122b is provided on the radially inwardly directed inner surface 206 of the first wall section 202, which can cooperate with a second cam disk 120b.
- a second wall section 208 is arranged radially inside the first wall section 202, on which a first cam disk guide 122a is provided, on the radially inner surface 210, which can cooperate with a first cam disk 120a.
- the first 202 and the ' second wall section 208 are connected via a third wall section 212 of the first housing part 104, which extends essentially radially inward, has a projection 2-14 on which the cap 102 can be supported,. and has a through opening 218 at its radially inner end 216.
- a fourth wall section 220 is integrally formed on the third wall section 212, essentially in the area of the passage opening 218, which tapers in the direction facing away from this third wall section 212 and in the interior 221 of which the tip 222 of the pin 116 is received to tip.
- a knife edge 112 extends through a — preferably slot-like — through opening — of the fourth wall section 220 and is detachably fastened to the fourth wall section 220 by means of a screw 111.
- the second housing part 106 is essentially cup-shaped and has a housing cover " 160 " , " which is “ preferably “ -ei ", essentially an elliptical wall area, and a side cover wall 224, which is integrally formed on the housing cover 160 and extends essentially radially inwards.
- This cover wall 224 has a through opening 226 through which the pin 116 can be inserted into the housing interior 228.
- a fifth 230 and a sixth wall section 232 near the through-opening 226 extend into the housing interior 228, the " radially inner inner surfaces 234, 236 of which extend essentially parallel to the longitudinal axis 118 of the guide sleeve 114.
- the eighth cam disk guide 122h is arranged on the inner surface 234 and interacts with the eighth cam disk 120h.
- the seventh cam disk guide 122g is arranged on the inner surface 236 and cooperates with the seventh cam disk 120g.
- the housing insert 108 which can in principle be designed in one or more pieces, is designed in two pieces in the design according to FIG. 8 and is inserted into the housing 103 with a slight press fit.
- the parting plane of the two parts of this housing insert 108 runs essentially through a central longitudinal axis 119 of the housing 103, it being provided in particular that these parts of the housing insert 108 are arranged essentially mirror-symmetrically to this parting plane.
- the two parts of the housing insert 108 are supported against one another in the circumferential direction.
- the two parts of the housing insert 108 can fundamentally form an “ essentially” closed outer surface or a non-closed, at least not completely closed, outer surface.
- the two parts of the housing insert 108 correspondingly placed one against the other, form a substantially non-closed or incompletely closed lateral surface.
- This is realized in the design according to FIG. 12 in such a way that these two parts of the housing insert 108 each have a substantially closed coherent wall section which forms a breakthrough-free jacket section which extends in the circumferential direction essentially parallel to the longitudinal axis 118 of the housing insert 108 and over a section in circumferential direction.
- This respective coherent and breakthrough-free jacket section of the two parts of the housing insert 108 is followed by tab-like extensions which extend in the circumferential direction.
- the outer surface of the housing insert 108 does not extend in the direction of the longitudinal axis of this housing insert 108 over the entire length of this insert 108.
- the tabs of the different parts of the housing insert 108 are supported against one another in the circumferential direction.
- the outer circumferential dimension compared to the inner circumferential dimension of the housing shell 160 is designed such that a slight interference fit is brought about when the housing insert 108 is inserted into the housing 103.
- Housing insert 108 has a third cam guide 122c, which interacts with a third cam 120c, a fourth cam guide 122d, which interacts with a fourth cam 12Od, a fifth cam guide 12 " 2e""" di : e "- 'with ⁇ " 'e-fifth "' cam 12O ' cooperates, and a sixth cam guide 122f, which cooperates with a sixth cam 120f.
- the rotary insert 110 furthermore has a guide sleeve 114 with a non-rotationally symmetrical, in particular elliptically shaped, jacket-like wall area 238, with which the third 120c, fourth 120d, fifth 120e and sixth 120f cam disc is connected in one piece.
- Cam disks 120a, 120b, 120c, 120d, 120e, 120f, 120g, 120h are arranged on the outer surface of this rotary insert 110.
- the first 120a and the eighth cam plate 120h are each formed by a section of the radially outer outer surface 240 of the jacket-like wall region 238 of the guide sleeve 114.
- the disk-shaped cam disks 120b, 120c, 120d, 120e, 120f, 120g also extend from this outer surface 240 of the jacket-like wall region 238 in the radial direction, which, as indicated by way of example by the reference symbol, may have cutouts 123.
- the thickness of these disks is preferably between 1 mm and 10 mm, and particularly preferably essentially 3 mm. But other dimensions are preferred.
- the first 120a, the second 120b, the third 120c and the fourth cam disk 12Od are assigned to a first group 242 and the fourth 120e, the fifth 120f, the sixth 120g and the seventh cam disk 120h are assigned to a second group 244.
- the cam disks 120a, 120b, 120c, 120d of the first group 242 are, in this order, axially offset and arranged adjacent to one another, with " adjacent" cam disks 120a, " in “ the design " according to " FIG. 12 ' - “” , 120b, 120c, 120d of the cam disks 120a, 120b, 120c, 120d of the first group 242 essentially abut one another in the axial direction.
- the cam disks 12Oe, 120f, 120g, 120h of the second group 244 are, in this order, axially offset and arranged adjacent to one another, with - in the design according to FIG. 12 - two adjacent cam disks 12Oe, 12Of, 120g, 120h each of the cam disks 120e , 120f, 120g, 120h of the second group 244 essentially abut one another in the axial direction.
- the first group 242 is arranged at a distance from the second group 244 in the axial direction.
- the first group 242 is arranged, essentially in the end region 246 of the guide sleeve 114, which faces the fourth wall section 220 of the first housing part 104, while the second group 244 essentially in the end region 248 of the guide sleeve facing away from the fourth wall section 220 of the first housing part 104 114 is arranged.
- the cam disks 120a, 120b, 120c, 12Od of the first group 242 interact with the cam disk guides 122a, 122b, 122c, 122d assigned to them in such a way that in each case the position of the rotary insert 110 in the circumferential direction is defined in a substantially unambiguous and repeatable manner at each angle of rotation , •
- cam disks 120e, 120f, 120g, 120h of the second group 244 interact with the cam disk guides 122e, 122f, 122g, 122h assigned to them.
- the number of cam disks assigned to a group can also be selected differently in order to essentially uniquely determine a position at each rotation angle of the rotary insert 110.
- three cam disks with correspondingly assigned cam disk guides can be provided.
- adjacent cams of a group are - at least partially - spaced axially apart from one another.
- the order of the cams in the axial direction can be designed differently.
- the cam disks assigned to the same group 242, 244 differ in size.
- the cam disks 120a, 120b, 120c, 120d assigned to the first group 242 are preferably arranged mirror-symmetrically to the cam disks 12Oe, 12Of, 120g, 120h assigned to the second group 244, with respect to a plane of symmetry that is oriented perpendicular to the longitudinal axis of the rotary insert 110. If appropriate, the entire rotary insert 110 is mirror-symmetrical with respect to this plane of symmetry.
- the inner contour of the guide sleeve 114 is non-rotationally symmetrical, in particular elliptical, and is preferably adapted to the outer contour of the pin 116, which has an elliptical cross-sectional area perpendicular to its longitudinal axis.
- the cap 102 can be detachably connected to the first housing part 104.
- the design of the cap 102 is cylindrical in the present application example.
- the cap 102 can be designed to be closed, facing away from it, and to catch chips that arise during the tip.
- FIG. 13 shows the sharpener 100 from the perspective of line 13-13 in FIG. 12.
- FIG. 13 illustrates the elliptical design of the housing envelope 160, which delimits an elliptical interior 106a. Furthermore, the cylindrical design of the cap 102 can be seen in FIG. 13.
- the knife edge 112 which extends through the slot 112b provided in the fourth wall section 220 into the inner space 221 and is releasably fastened to the fourth wall section 220 by means of a screw 111, has a cutting edge 112a.
- 13 also illustrates the elliptical design of the opening section 104a facing the second housing part 106 of the passage opening 218 and the circular design of the opening cross section 104b facing away from the second housing part 106. Through opening 218.
- FIG. 14 shows the sharpener 100 from the perspective of line 14-14 in FIG. 12.
- the housing insert 108 is inserted into the housing sleeve 160 with a slight interference fit, the two parts of this housing insert 108 being supported on one another by tabs 250, 252, 254, 256 extending in the circumferential direction.
- the 14 also shows the first cam guide 122a and the second cam guide 122a.
- the first guide surface 258a of the first cam disk guide 122a and the second guide surface 258b of the second cam disk guide 122b are each flat and axially offset from one another and arranged parallel to one another.
- the first cam disk 120a makes contact with the first cam disk guide 122a in at least one rotational position, as shown in FIG. 14.
- the first cam disk 120a preferably contacts the first cam disk guide 122a in every rotational position.
- FIG. 15 shows a view along lines 5-15 in FIG. 12.
- the rotational position of the rotary insert 110 corresponds to that shown in FIG. 14 in the illustration according to FIG. 15.
- the second, elliptically designed cam disk 120b bears against the second cam disk guide 122b.
- the first 120a and the second cam plate 120b are arranged with respect to one another such that their respective major axes 124a and 124b are perpendicular to one another.
- 15 also shows the third 122c and the fourth cam guide 122d, each of which extends inwards as a kind of intermediate wall from the outer wall 268 of the housing insert 108, in particular perpendicular to the longitudinal axis 118.
- the third guide surface 258c of the third cam disk guide 122c and the fourth guide surface 258d of the fourth cam disk guide 122d are in each case "designed" and offset axially to one another and arranged parallel to one another.
- the third 258c and the fourth guide surface 258d are further arranged perpendicular to the first 258a and the second guide surface 258b.
- the third cam disk 120c bears against the third cam disk guide 122c at least in one rotational position, in particular in all rotational positions.
- the peripheral surface of the third cam disc has two curved regions which abut one another with their respective ends, so that two substantially tapering transition regions 270, 272 are formed between the curved regions. These tips 270, 272 face each other and are about 45 degrees from the big one
- the main axis 124a of the first cam plate 120a is rotated clockwise and about 45 degrees counterclockwise with respect to the major main axis 124d of the second cam plate 120b.
- the third cam plate 120c is designed in such a way that the curvature 123a extending to the main axis 124b of the second cam plate 120b is somewhat rounder than the curvature 123b which runs in the opposite direction. Furthermore, the third cam plate 120c is point-symmetrical in the view plane running perpendicular to the longitudinal axis 118.
- FIG. 16 shows a view along the line 16-16 in FIG. 12.
- the fourth cam disk 12Od is in contact with the fourth cam disk guide 122d at least in one rotational position, in particular in all.
- the fourth cam 12Od is . mirror-symmetrical to the third cam 120c with respect to the major axis 124b of the second cam 120b.
- FIG. 17 shows a view along the line 17 - 17 in FIG. 12.
- the third cam 120c is asymmetrical.
- the sections 125a to 125d of the cam disk guides 122a to 122h facing the cam disks 120a to 120h are essentially flat.
- the guide sleeve 114 is held in each rotational position in such a way that the tip of a pin received in the guide sleeve 114 is guided along the cutting edge 112a.
- the terms left, right, below and above should be understood as follows: In the sectional plane perpendicular to the central longitudinal axis 119, directions above and below are to be understood, which extend in a first direction. The left and right are to be understood as directions that extend in a second direction perpendicular to the first direction. The position of the knife edge 112 is defined as above.
- the first cam disk guide 122a prevents the rotary insert 110 from deflecting upwards by contact with the first cam disk 120a.
- the second cam plate 120b which is located axially next to the first cam plate 120a, represents an upward guide; that is, it prevents the rotary insert 110 from moving downward.
- 16 shows the third cam plate 120c and its cam plate guide 122c.
- FIG. 17 shows the fourth cam disk 12Od and the fourth cam disk guide 122d, which, in their interaction, enable guidance to the right. Seen from the first housing part 104, in the rear * part of the sharpener there is a corresponding arrangement of four cam disks 120a to h and their four cam disk guides 122g and 122h (two cam disk guides cannot be seen), which ensures an even smoother run; tilting in particular is prevented.
- the total of eight cam disks 120a to 120h and eight cam disk guides 122a to 122h thus make it possible for the rotary insert 110 to move up and down in the direction of arrow 150 and to the right and left in arrow direction 152 (FIG. 17), so that the pin in any angle of rotation abuts the cutting edge.
- the position of the rotary insert 110 is clearly defined by each angle of rotation.
- the rotary insert 108 can only be axially displaced when the housing 103 is open, in a limited number of rotational positions, in particular for assembly. This can be one or two or three or four or more rotational positions, for example. In the remaining rotational positions, stops act in the axial direction, in particular in both orientations of the axial direction.
- the stops can, for example, be designed in such a way that, if necessary, alternately, cam disks strike in the axial direction on adjacent cam disk guides under axial load.
- the sharpener 100 has a housing 103 with a first housing part 104 and with a second housing part 1 ; 06. • -
- the second housing part 106 has a first housing wall; cut 400 and a second housing wall section 402, which is fixedly and integrally connected to the first housing wall section 400.
- the first housing wall section 400 of the second housing part 106 is designed to be ring-elliptical and extends around a longitudinal axis 404 of the housing.
- the second housing wall section 402 of the second housing part 106 extends essentially radially to the housing longitudinal axis 404.
- This second housing wall section 402 is designed as an elliptical plate and has an elliptical one Through opening 406.
- A, in particular circular, recess 408 extends around the through opening 406 on the side of the second housing wall section 402 facing the housing interior 228.
- A, in particular disc-shaped, sealing element 410 is received in this depression.
- This sealing element 410 has a through opening 412.
- This has an elliptical cross-sectional area that is smaller than the elliptical cross-sectional area of the through opening 406, which is provided in the second housing wall section 402.
- the outer circumferential contour of the sealing element 410 can, for example, have a circular shape, the diameter of this circular shape being smaller than the diameter of the circular depression 408.
- the first housing part 104 is designed in one piece and is connected fixedly or detachably to the second housing part 106.
- the first housing part 104 has a disk-like region 414 which extends " substantially perpendicular to the longitudinal axis 404 of the housing.
- This disk-like region 414 has an outer circumferential contour radially on the outside, which is essentially matched to the inner circumferential contour of the first housing wall section 400 a through opening 416 is provided in the disk-like region 414.
- An extension is provided on this disk-like area 414, which extends from this area 414 in the direction facing away from the housing interior 228 and receives the knife edge 112 by means of a screw 111.
- flanges 510, 512 are also provided, which extend from the radially outer section of the Reichs 414 protrude in the axial ' direction and the housing interior 228.
- These flanges 510, 512 terminate radially on the outside with the disk-like region 414, are each designed as a ring ellipse section and are spaced apart from one another in the circumferential direction by spaces 417, 418.
- the first housing part 104 is inserted axially into the second housing part 106.
- a cap or lid 102 is releasably attached to the housing 103 to a space 420 for collecting the. Creating chips.
- This cap 102 can, for example, have a shoulder 422 in its wall 424 and can be inserted with an area 426 adjoining this shoulder in or on the first housing wall section 400, in particular centered.
- an, in particular elliptical, through opening 428 is also provided, through which the pin 16 can extend to the knife edge 11 2 ′.
- a rotary insert 110 which has a guide sleeve or bush 114 and a support section 430 which extends essentially radially to the longitudinal axis 404.
- This support section 430 is designed in such a way that it can absorb any tilting moments which occur around an axis the guide sleeve 114 act, which is directed perpendicular to the longitudinal axis 404 of the housing.
- this support section 430 is designed as a disk with a round outer peripheral contour, which is arranged axially at the end on the guide sleeve 114 and is integrally connected to the latter.
- This disc can Support like area 414 of the first housing part 104 and / or on the housing insert 108.
- the through opening provided in this support section 430 corresponds - in particular also with regard to the contour - to the through opening 432 provided in the guide sleeve 114.
- a cam disk arrangement 434 is also provided, which is designed as a one-piece cam disk insert 436 with three axially adjacent cam disks 438, 440, 442.
- This cam disk insert 436 has a through opening 444, which is designed such that the outer surface 446 of the guide sleeve 114 can be received in a form-fitting manner, in particular essentially or almost free of play.
- cams 438, 440, 442 interacts with a cam guide 448, 450, 452.
- cam disk guides 448, 450, 452, of which the cam disk guide 452 is shown in FIG. 18, are likewise axially offset and arranged adjacent to one another.
- the third cam disk guide 452 is formed by the inner surface 454 of a through opening 456, which is provided in a first, radially extending wall section 458 of the housing insert 108.
- a second, radially extending wall section 460 of the housing insert 108 is provided in the axial direction at a distance from this first radially extending wall section 458.
- a web 462, 464 protrudes is essentially straight and elongated. These webs 460, 462 serve as the first 448 or second cam disk guide 450 for the first 438 or second cam disk 440.
- a through opening 466 is provided, through which the guide sleeve 114 extends.
- the first 438 and the second cam disc 440 are arranged axially between the first 458 and the second, radially extending wall section 460 of the housing insert 108.
- FIG. 19 shows a view along the line 19-19 from FIG. 18 with the cover 102... .. - -. - ⁇ - .. _-
- the second housing part 104 is inserted, on which an extension 480 is provided, which receives the knife edge 112 by means of a screw 111.
- a section of the passage opening 428 of the first housing part 104 can also be seen.
- FIG. 20 shows a sectional view along the line 20-20 from FIG. 18 in a representation rotated by 90 °.
- 20 shows the cam disk insert 436, which has the first cam disk 438 and the second cam disk 440.
- These cams 438, 440 are firmly connected to a sleeve 490, the surface of which forms the third cam 442 in an axially offset plane.
- the cam disk insert 436 or the sleeve 490 of the cam disk insert 436 is arranged around this guide sleeve 114 in the circumferential direction and in a form-fitting manner.
- first cam disk guide 448 designed as a web 462 and — indicated by dashed lines — the second cam disk guide 450 designed as a web 464.
- FIG. 20 shows two wall sections 492, 494, which are arranged fixedly on the radial wall section 458 of the housing insert 108 and extend radially on the outside in the circumferential direction and axially, between which, viewed in the circumferential direction, gaps 496, 498-given ' - ' are; - '- • -.- ⁇ - -
- the first 438 and / or the second cam disc 440 can extend into these spaces 496, 498, with a corresponding rotational position.
- FIG. 21 shows a sectional view of the design according to FIG. 18 along the line 21-21 in a representation rotated by 90 °.
- FIG. 22 shows a sectional illustration of the design according to FIG. 18 along the line 22-22 in a representation rotated by 90 °.
- FIG. 22 also shows the flanges 510, 512 arranged on the disk-like region 414 of the first housing part 104. that protrude from the radially outer portion of the region 414 in the axial direction and the housing interior 228 facing.
- the circumferential gaps 416, 418 between these flanges 510, 512 are also shown.
- FIG. 22 also shows the support section 430, which is designed here as a disk, and the passage opening 432 which extends through this support section 430 or the guide sleeve 114.
- Line 514 indicates the passage opening 428 of the first housing part 104, which in the sectional view according to FIG. 22 is partially covered by the support section 430.
- the lines 430 'and 432' indicate the position of the support section 430 or the through opening 432, which is present when a pin or the guide sleeve 114 is rotated 90 degrees with respect to the above-described position according to FIG. As can be seen from these different positions of the support section, the latter extends temporarily into the interstices 416, 418, in particular alternately.
- FIG. 23 shows an exemplary embodiment according to the invention in a schematic illustration.
- the sharpener 100 according to FIG. 23 differs from the exemplary embodiment according to FIG. 18 in particular in the design of the rotary insert 110 and the design of the cam disk arrangement 434.
- the rotary insert 110 is connected in one piece to the cam disk arrangement 434 in the exemplary embodiment according to FIG. 23. 23 does not have the disk described with reference to FIG. 18 430, which is arranged in the design there between the housing insert 108 and the disk-like region of the housing insert 104.
- a further sealing device or sealing disk 530 is provided instead at said location.
- the sealing devices 410 and 530 are - seen in the axial direction - arranged on different sides of the housing insert 108.
- the sealing device or sealing disk 530 has a through opening 532 radially on the inside, through which the guide sleeve 114 of the rotary insert 110 extends.
- first 438 and the second cam disc 440 are arranged on the two axial sides of a radially extending disc 534, which from the radial outside of the respective cam disc guides 448 and 450 can be contacted.
- flanges 540, 542 which extend in sections in the circumferential direction are provided at the radially outer end of the disk 534 and each extend, for example, along a section of a circular path and are spaced in the circumferential direction by spaces 544, 546.
- the " third cam 442 is formed by a surface area of the guide sleeve 114.
- 24 shows a sectional illustration of the design according to FIG. 23 along the line 24-24 in a representation rotated by 90 ° with the cover 102 removed.
- FIG. 25 shows a sectional illustration of the design according to FIG. 23 along the line 25-25 in a representation rotated by 90 °.
- first cam disk guide 448 which is rounded radially outward and radially inward.
- the first cam disk guide 448 plunges into the intermediate space 546 or, if appropriate, into the intermediate space 544, with the rotary insert 110 in a corresponding rotational position.
- FIG. 26 shows a sectional illustration of the design according to FIG. 23 along the line 26-26 in a representation rotated by 90 °. ""'"' . - .. -. .. - . - .
- Fig. 26 shows that the guide sleeve 114 of the rotary insert 110 is integrally connected to the second cam 440.
- the second cam disk guide 450 according to FIG. 26 is designed in the way that was explained with reference to FIG. 25 with respect to the first cam disk guide 448.
- FIG. 27 shows a sectional illustration of the design according to FIG. 23 along the line 27-27 in a representation rotated by 90 °.
- FIG. 27 shows in particular that the third cam plate 442 is formed by a region of the guide sleeve 114 or a region of the outer surface of the guide sleeve 114.
- FIGS. 18 to 22 show different views or sectional views of an exemplary design according to the invention, which is similar to the design explained with reference to FIGS. 18 to 22.
- the guide sleeve 114 has a non-constant wall thickness in the circumferential direction.
- the smallest wall thickness 564 is given in the area of the small main axis of the ring-elliptical cross-sectional shape and the thickest wall thickness 566 in the area of the large main axis.
- the wall thickness of the guide sleeve 114 is constant in the circumferential direction.
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02722135A EP1365929A1 (de) | 2001-02-25 | 2002-02-25 | Anspitzer |
CA002476863A CA2476863A1 (en) | 2001-02-25 | 2002-02-25 | Sharpener |
US10/647,661 US20050044730A1 (en) | 2001-02-25 | 2003-08-25 | Sharpener |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2001109167 DE10109167A1 (de) | 2001-02-25 | 2001-02-25 | Spitzer |
DE10109167.2 | 2001-02-25 | ||
DE10137096.2 | 2001-07-30 | ||
DE2001137096 DE10137096A1 (de) | 2001-07-30 | 2001-07-30 | Anspitzer |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/647,661 Continuation US20050044730A1 (en) | 2001-02-25 | 2003-08-25 | Sharpener |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002068215A1 true WO2002068215A1 (de) | 2002-09-06 |
Family
ID=26008625
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2002/001972 WO2002068215A1 (de) | 2001-02-25 | 2002-02-25 | Anspitzer |
Country Status (4)
Country | Link |
---|---|
US (1) | US20050044730A1 (de) |
EP (1) | EP1365929A1 (de) |
CA (1) | CA2476863A1 (de) |
WO (1) | WO2002068215A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7832108B2 (en) * | 2002-09-18 | 2010-11-16 | Sterios-Primiani Leanna | Pencil sharpener cap |
US7143516B2 (en) * | 2002-09-18 | 2006-12-05 | Leanna Sterios | Pencil sharpener cap |
US20050145086A1 (en) * | 2004-01-05 | 2005-07-07 | Mohr Monte D. | Combination pencil sharpener bottle cap |
US7036231B2 (en) * | 2004-05-21 | 2006-05-02 | Kum Limited | Sharpener for an oval pencil |
US7654179B2 (en) * | 2006-07-26 | 2010-02-02 | Elmer's Products, Inc. | Crayon sharpener |
KR20100136816A (ko) * | 2009-06-19 | 2010-12-29 | 권오중 | 크레파스 깎이 |
DE102010051312B4 (de) * | 2010-11-16 | 2014-09-04 | Eisen Gmbh | Spitzer für Schreib-, Zeichen- und/oder Kosmetikstifte |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3659637A (en) * | 1971-01-11 | 1972-05-02 | Robert S Condon | Pencil lead pointer |
DE7629766U1 (de) * | 1976-09-23 | 1978-01-19 | Tomov, Mitko, 8000 Muenchen | Spitzer fuer bleistifte |
US4081010A (en) * | 1975-02-19 | 1978-03-28 | Fabrica Italiana Lapis Ed Affini (Fila) Spa | Pencil sharpener for non-circular section pencils |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2510248A (en) * | 1946-04-22 | 1950-06-06 | Ira S Peightel | Portable pencil sharpener |
US3889730A (en) * | 1974-01-10 | 1975-06-17 | John L Buc | Pencil sharpener |
US4961451A (en) * | 1987-05-11 | 1990-10-09 | Bucci Albert W | Sharpener for rectangular pencils |
US5067382A (en) * | 1990-11-02 | 1991-11-26 | Cray Computer Corporation | Method and apparatus for notching a lead wire attached to an IC chip to facilitate severing the wire |
DE19840309A1 (de) * | 1998-09-04 | 2000-03-09 | Kum Gmbh & Co Kg Kunststoff Un | Spitzer insbesondere für Weichminenstifte |
-
2002
- 2002-02-25 CA CA002476863A patent/CA2476863A1/en not_active Abandoned
- 2002-02-25 WO PCT/EP2002/001972 patent/WO2002068215A1/de not_active Application Discontinuation
- 2002-02-25 EP EP02722135A patent/EP1365929A1/de not_active Withdrawn
-
2003
- 2003-08-25 US US10/647,661 patent/US20050044730A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3659637A (en) * | 1971-01-11 | 1972-05-02 | Robert S Condon | Pencil lead pointer |
US4081010A (en) * | 1975-02-19 | 1978-03-28 | Fabrica Italiana Lapis Ed Affini (Fila) Spa | Pencil sharpener for non-circular section pencils |
DE7629766U1 (de) * | 1976-09-23 | 1978-01-19 | Tomov, Mitko, 8000 Muenchen | Spitzer fuer bleistifte |
Also Published As
Publication number | Publication date |
---|---|
CA2476863A1 (en) | 2002-09-06 |
US20050044730A1 (en) | 2005-03-03 |
EP1365929A1 (de) | 2003-12-03 |
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