WO2001014108A1

WO2001014108A1 - Cutting apparatus

Info

Publication number: WO2001014108A1
Application number: PCT/JP2000/005534
Authority: WO
Inventors: Hiroshi Kuramochi
Original assignee: Kubo, Shotaro
Priority date: 1999-08-25
Filing date: 2000-08-18
Publication date: 2001-03-01
Also published as: JP2001062162A; AU6595300A

Abstract

A cutting apparatus capable of neatly cutting not only ordinary paper sheets but also various types of sheet-like cut objects and braid-like cut objects such as cardboard, cloth, and hard and soft plastics very easily and rapidly without requiring any special technique, wherein a cut object guiding recessed part (5), a blade (6), cut object arresting means (8, 9) are provided on a cutting apparatus main body (2), whereby, when the cut object (11) is held by hand, invaded into the cut object guiding recessed part (5), and moved relatively to the cutting apparatus (1), the cut object (11) is brought into contact with a blade tip (6a) and cut in the state of being arrested elastically by the cut object arresting means (8, 9) near the blade tip (6a) in thickness direction.

Description

Description Cutting device Technical field

The present invention relates to a cutter suitable for cutting a sheet-like object or a string-like object such as paper, cloth, soft plastic, and somewhat thin hard plastic including cardboard. Background art

Conventionally, scissors, cutter knives, openers, and the like have been commonly used as cutting hand tools for cutting sheet-like objects to be cut, such as paper, cloth, and soft plastic.

Further, conventionally, a cutting object main body is provided with a cutting object guide recess which enters inward from the outer periphery of the cutting device body, and the cutting edge is positioned in a narrow portion of the cutting object guide recess. There was a cutter attached to the blade. With this type of cutter, when an object to be cut is made to enter into the object guide recess, the end of the object comes into contact with the cutting edge of the blade, and the object is cut. I have. The general cutting hand tools such as the iron, the cutter knife, the opening device, and the like have a problem that a technique is required to cleanly cut an object to be cut. In addition, the blade is exposed, and there is a problem that it is dangerous for infants to use or touch it, and that there is a danger that even adults may be injured unexpectedly. In addition, the objects to be cut are limited, and there is also a problem that cardboard, cloth, hard plastic, and soft plastic cannot be cut or are difficult. Also, in the case of scissors, the blade must be opened and closed many times to cut it, so there is a problem that it takes time to cut the object to be cut. On the other hand, the conventional cutter can substantially prevent the blade from being exposed. It is safe to use, but even if the object to be cut is paper, when the edge of the paper hits the cutting edge of the blade, the area near the edge of the paper is bent so that the edge of the paper escapes from the cutting edge. However, there was a problem that the paper was often broken, and the vicinity of the end of the paper was along the cutting edge of the blade, and was clogged in the recess for guiding the object to be cut, so that cutting was often impossible. Further, there has been a problem that cutting of materials other than paper, such as cloth and hard / soft plastic, is impossible or difficult.

The present invention has been made in view of such conventional circumstances, and one object of the present invention is to cut not only ordinary paper but also sheet-like cuts of cardboard, cloth, hard and soft plastics, and the like. It is an object of the present invention to provide a cutter which can cut various objects, such as objects or string-shaped objects, very simply, quickly and neatly without requiring any particular technique.

It is another object of the present invention to provide a very safe cutter which can substantially prevent the blade from being exposed.

Still other objects of the present invention will be apparent from the following description. Disclosure of the invention

A cutting device according to the present invention includes: a cutting device main body; a cutting object guide recess provided in the cutting device main body; A blade attached to the cutter body so that the cutting object is provided on the cutter body, and the cutting object that has been intruded into the cutting object guide recess toward the blade tip is The cutting object restraining means for elastically restraining the cutting object in the thickness direction at least in the vicinity of the cutting edge including a region in front of the cutting edge without hindering the movement of the cutting object.

In the cutter according to the present invention, the object to be cut is made to enter the object guide recess, and the object is relatively moved with respect to the cutter in a direction from the entrance side of the object guide recess toward the blade. By moving the workpiece quickly in one operation Can be cut.

More specifically, as described above, when the object to be cut penetrates into the object guide recess and is relatively moved with respect to the cutter body, the object to be cut is cut near the cutting edge by the object to be cut restraining means. The object is elastically restrained in the thickness direction, and in this state, the object comes into contact with the cutting edge and is cut.

Here, in general, when cutting a sheet-shaped or string-shaped object with a blade, once the blade is cut into the end of the object, the remaining portion of the object is cut. Is easily done. Therefore, what is most important for good cutting of the workpiece is the state where the edge of the workpiece first contacts the blade. As in the case of the above-mentioned conventional cutter, when the end of the object comes into contact with the cutting edge of the blade, if the end of the object escapes from the cutting edge, cutting into the end of the object is performed. It fails and, of course, the rest of the object cannot be cut.

However, in the cutter according to the present invention, the end of the object to be cut is preferably pressed against the cutting edge of the blade in a state where the object to be cut is constrained in the thickness direction in the vicinity of the cutting edge by the object restricting means. In this state, the contact is made, so that it is possible to prevent the vicinity of the edge of the object to be bent or broken so that the edge of the object escapes from the cutting edge, so that the blade is securely attached to the edge of the object Can be cut. The cutting of the remaining part of the work is easy from the beginning, as described above, and the cutting is also performed in the vicinity of the cutting edge in a state where the work is restrained in the thickness direction by means of the work to be cut, so the remaining part is also cut reliably. Go being.

Thus, the cutting device of the present invention can be used not only for ordinary paper, but also for cardboard or other cardboard, cloth, soft plastic, or a somewhat thin sheet such as a polycarbonate thin plate, or a sheet-shaped object such as a hard plastic. Various kinds of objects to be cut, such as cords and string-shaped objects, can be cut very simply, quickly, and very neatly without any particular skill. Also, it is very safe because the blades can be virtually not exposed. BRIEF DESCRIPTION OF THE FIGURES

[Fig. 1]

It is a front view showing one embodiment of a cutting device by the present invention.

[Fig. 2]

It is a left view which shows the said Example.

[Fig. 3]

It is a top view showing the above-mentioned example.

[Fig. 4]

FIG. 3 is a cross-sectional view taken along the line IV-IV in FIG.

[Fig. 5]

FIG. 5 is a cross-sectional view taken along line VV of FIG.

[Fig. 6]

FIG. 5 is an enlarged sectional view showing a main part of FIG.

[Fig. 7]

FIG. 6 is an enlarged cross-sectional view showing the vicinity of a second object to be restrained in FIG.

[Fig. 8]

FIG. 6 is an enlarged sectional view showing the vicinity of an end of a groove in FIG.

[Fig. 9]

It is a top view which shows the cutting method of the to-be-cut object in the said Example.

[Fig. 10]

FIG. 7 is an enlarged cross-sectional view corresponding to FIG. 6, and is an enlarged cross-sectional view showing a state where an object to be cut has entered a cut-object guide recess in the embodiment.

[Fig. 11] FIG. 2 is a sectional view taken along line XI-XI in FIG. 1.

[Explanation of symbols]

1 Cutting device

2 Cutting device body

5 Workpiece guide recess

6 blades

6a cutting edge

8 First material to be cut

9 Second material to be cut

1 1 Workpiece

1 7 best mode for carrying out the invention

Hereinafter, the present invention will be described based on examples.

【Example】

1 to 10 show an embodiment of the present invention. In this embodiment, the cutter body 2 of the cutter 1 is formed by joining casings 3 and 4 as shown in FIGS. 2b, and is entirely flat. The cases 3 and 4 are made of a material having sufficient rigidity such as metal, plastic, ceramic, and wood. The beak-shaped portion 2b of the cutter body 2 has a to-be-cut object guiding recess 5 which enters the inside of the beak-shaped portion 2b from the outer periphery of the tip of the beak-shaped portion 2b toward the grip portion 2a. Is provided. The cut-piece guide 5 has a wide width at the entrance 5a side, but has a narrow width and a linear shape at the deep portion 5b.

As shown in FIG. 4, in the beak-shaped portion 2b, a blade 6, a blade moving screw 7, and first and second workpiece restraining members 8, 9 are provided between the cases 3, 4. Is housed. As shown in FIG. 4, the blade 6 has a blade accommodating recess 10 provided on the inner surface side of the cases 3 and 4 and a cutting edge 6a on the inlet 5a side of the workpiece guiding concave portion 5. Is housed so as to be movable in the direction parallel to the cutting edge 6a. The cutting edge 6a intersects a part 5b on the back side of the workpiece guide recess 5, whereby a part of the blade 6a is connected to a back part 5b of the workpiece guide recess 5. positioned. The blade 6 is preferably made of a hard material such as molybdenum steel in order to improve sharpness and durability, and its surface is coated with a low friction material such as fluororesin to reduce frictional resistance. Is preferred. Further, when the object 11 is made of general paper or hard or soft plastic, the thickness of the blade 6 is preferably about 0.1 to 0.3 mm. To show the thickness, the thickness of blade 6 is drawn larger than the actual ratio.) The cutting edge 6a of the blade 6 is roughly oriented with respect to the direction of the part 5b on the back side of the workpiece guide recess 5 (this direction will be the traveling direction of the workpiece 11 as will become clear later). When it is tilted by about 45 degrees, it shows the best sharpness for the object 11 to be cut. The blade moving screw 7 is configured to be rotatable around the axis of the screw 7 with respect to the cutter body 2 and to be unable to move in the axial direction. As shown in FIG. 1, a part of the peripheral surface of the head 7 a of the blade moving screw 7 is exposed outside the cutter body 2. The screw portion 7b of the blade moving screw 7 is screwed into a sawtooth-shaped portion 6b provided on the side end opposite to the blade edge 6a of the blade 6, and when the blade moving screw 7 is rotated, The blade 6 moves in the direction parallel to the blade edge 6a as indicated by arrow A in FIG.

The first and second cut object restraining members 8 and 9 are members constituting the cut object restraining means in the present embodiment, and each of the metal leaf springs has a thickness of about 0.1 to 0.3. It is contained in the restraining material receiving recesses 12, 18 provided on the inner surface side of the cases 3, 4. Are positioned inside the restraining material accommodating recesses 12 and 18. These first and second cut object restraining members 8 and 9 correspond to the cut object 11. In order to reduce frictional resistance, it is preferable that the surface is coated with a low friction material such as a fluororesin.

As shown in FIG. 6, both ends of the first object-to-be-cut constraining member 8 are formed into hook-shaped portions 8a and 8b by being bent in a hook shape. The intermediate portion of the first object to be cut 8 is curved into an elongated U-shape to form a U-shaped portion 8c. The hook-shaped portions 8 a and 8 b at both ends of the first object-to-be-cut constraining member 8 are hooked around the outer periphery of boss portions 13 and 14 provided integrally with the case 3. One end of the second object to be constrained member 9 is formed into a hook-like portion 9 a by being bent in a hook shape, and the hook-like portion 9 a is a boss provided integrally with the case 3. It is hooked on the outer circumference of part 15. The other end 9b of the second object to be cut 9 is straight, and is inserted into the insertion groove 16 provided in the cases 3 and 4 for positioning. In the middle part of the second object to be cut 9, a U-shaped part 9 c curved to form an elongated U-shape and a loop-shaped part 9 d curved to form almost a loop Are formed.

The U-shaped portions 8c, 9c of the first and second cut object restraining members 8, 9 have their side surfaces opposed to each other in a portion 5b on the deep side of the cut object guide concave portion 5. . In the free state where the object to be cut 11 is not inserted between the U-shaped portions 8c and 9c, the side surfaces of the U-shaped portions 8c and 9c are in contact with each other with almost zero pressure. Is preferable. The side surfaces of the U-shaped portions 8c and 9c opposed to each other are parallel to the deep portion 5b of the cut portion guide recess 5. The tips of the U-shaped portions 8c, 9c are shifted back and forth along the cutting edge 6a of the blade 6. The portion between the hook-shaped part 8a of the first workpiece restraint 8 and the U-shaped part 8c and the hook-shaped part 9a and U-shaped part 9c of the second workpiece restraint 9 A V-shaped portion having an opening on the side of the entrance 5a of the object-guiding recess 5 is formed between them. The first and second workpiece restraining members 8, 9 are, as described above, As the hook-shaped parts 8a, 8b, 9a are hooked on the boss parts 13, 14, 15, 15, the elastic deformation of the cut-piece restraining members 8, 9, as will be described later in detail, It is attached to the cutter main body 2 so as to be slightly movable in the direction parallel to the part 5b on the back side of the object guide recess 5 (the traveling direction of the object 11 described later) (the movable range is For example, about 0.5 mm is sufficient). Each of the U-shaped portions 8c and 9c of the workpiece restraint members 8 and 9 is provided with a respective slit 17 into which the cutting edge 6a of the blade 6 and its vicinity enter. are doing. Thus, the U-shaped portions 8c and 9c are present on both sides of the blade 6 and before and after the blade edge 6a. When the thickness of the blade 6 is 0.1 to 0.3 mm, the width of the slit 17 is preferably about 0.12 to 0.32 strokes.

On the outer surfaces on both sides of the cutter main body 2, linear grooves 19 are provided on the extension line of the part 5 b on the far side of the object guide concave portion 5. As shown in FIGS. 5 and 8, the depths of these grooves 19 are such that they are flush with both side surfaces of the blade 6 at the end of the workpiece guide recess 5 at the entrance 5a side. It is formed so as to be the deepest and shallower toward the opposite end, so that it is flush with the outer surfaces of the cases 3 and 4. As a result, in the cross sections of FIGS. 5 and 8, the bottom of the groove 19 has a wedge shape.

Next, the method of use and operation of the present embodiment will be described. The cutter 1 has, for example, a gripper 2a with one hand and a sheet-like object 11 of paper, cloth, hard or soft plastic with the other hand, and FIGS. 9 and 10 As shown in the figure, the object to be cut 11 is made to enter the object-guiding recess 5, and is directed from the entrance 5 a side of the object-guiding recess 5 to the blade 6. Side part 5b and the groove 19 in the direction parallel to the cutter 1 in the direction indicated by the arrow C in FIG. 10). The operation allows the object 11 to be cut quickly.

This will be described in more detail with reference to FIG. 10. When the object is inserted into the object guide recess 5 and is moved relative to the cutter body 1, the object 11 is cut into the U-shaped portions 8c, 9c of the object restraining members 8, 9. Invading in between. As a result, the object restraint members 8 and 9 are elastically deformed in the thickness direction of the object 11 by an amount corresponding to the thickness of the object 11 and the object 11 becomes a U-shaped part 8 c. , 9c, and on both sides of the blade 6 and immediately before the blade edge 6a, the elasticity of the cut-piece restraining members 8, 9 is elastically restrained in the thickness direction. When the object 11 enters between the side surfaces of the U-shaped portions 8C and 9c, in this embodiment, as shown by the arrow B in FIG. Since the loop-shaped portion 9d of the second object is elastically deformed so as to reduce its diameter, the second object-binding material 9 is elastically deformed very flexibly.

Further, in the present embodiment, when the object 11 enters between the side surfaces of the U-shaped portions 8 c and 9 c of the first and second object restraining members 8 and 9, The workpiece restraint members 8 and 9 are caught by the bosses 13, 14, and 15 because the workpiece 11 receives the force in the direction of movement of the workpiece 11 (the direction of arrow C). The first and second cut-piece restraining members 8, 9 are slightly reduced by elastically deforming the hook-shaped parts 8a, 8b, 9a of the cut-piece restraining members 8, 9 so as to spread. The object 1 moves in the direction of travel.

When the object 11 further moves relative to the cutter body 1, the first and second objects are cut near the end of the object 11 on both sides of the blade 6 and near the cutting edge 6a. In a state where the object 11 is elastically constrained in the thickness direction by the object restraining members 8 and 9, the end of the object 11 contacts the cutting edge 6a, and the cutting edge 6a is cut into the end. As described above, in general, when cutting a sheet-like or string-shaped object 11 with a blade, once the blade 6 is cut into the end of the object 11, the object is cut. Cutting of the rest of 1 1 is easy. Therefore, what is most important for cutting the object 11 well is the state at the time when the end of the object 11 comes into contact with the blade 6 for the first time. In the case of the conventional cutter As described above, when the edge of the object comes into contact with the cutting edge, if the edge of the object escapes from the cutting edge, the cutting into the edge of the object fails. The rest of the can not be cut.

However, in this cutter 1, in the state where the vicinity of the end of the cut portion 11 is constrained in the thickness direction by the cut material restraining members 8, 9, the end of the cut object 11 is a blade 6. Contacting the cutting edge 6 a of the cutting object 11, so that the vicinity of the end of the cutting object 11 1 can be prevented from bending or breaking so that the end of the cutting object 11 escapes from the cutting edge 6 a. The blade 6 can be reliably cut into the end of the object 11. The remaining part of the workpiece 11 is easy to cut from the beginning as described above, and is also restrained in the thickness direction on both sides of the blade 6 and near the cutting edge 6a by the workpiece restraining members 8 and 9 as well. Since the cutting is performed in a state where the cutting is performed, the remaining portion is also surely cut, and the cutting of the object to be cut 11 is completed, and the object to be cut 11 is the first and second objects to be cut. When the first and second cut object restraining members 8, 9 return from their original shapes, due to their elasticity, they return to their original positions.

Although the above description has been made on the assumption that the object 11 is in the form of a sheet, the cutter 1 can also cut a string-shaped object very finely in the same manner.

In this way, the cutter 1 can be used not only for ordinary paper, but also for cardboard, cloth, soft plastic, or a somewhat thin material such as a polycarbonate sheet, or a sheet-like material 1 such as a hard plastic. Various types of objects to be cut, such as one or a string-shaped object to be cut, can be cut very simply, quickly, and very neatly without any particular skill.

Further, the blade 6 can be substantially prevented from being exposed, which is very safe.

In the present embodiment, since the groove 19 is provided, the The part cut into two pieces is guided by the bottom of the groove 19 and proceeds, so that the part cut into two is caught by the cutter 1 body and the object to be cut 1 1 There is no hindrance to cutting.

In this embodiment, when the blade 6 becomes dull, the blade moving screw 7 is rotated in a predetermined direction, and the blade 6 is moved in a direction parallel to the blade edge 6a, so that a new blade edge 6a is formed. The portion can be positioned in the workpiece guide recess 5 and the sharpness of the blade 6 can be restored.

In the present invention, the shapes of the object-restricted members 8 and 9 are not limited to the shapes in the above-described embodiment.

Further, in the above embodiment, the first and second cut object restraining members 8 and 9 can be moved in the traveling direction of the cut object 11 as a whole within a certain range with respect to the cutter main body 2. However, in the present invention, it is not necessary to make the object restraining members 8 and 9 movable relative to the cutter body 2. However, if the first and second objects to be cut 8 and 9 can be moved in the traveling direction of the object 11 within a certain range with respect to the cutter body 2 as in this embodiment, In the process in which the first and second workpiece restraining members 8 and 9 move toward the cutting edge 6 a while holding the workpiece 11, the end of the workpiece 11 contacts the blade 6. Since the blade 6 can be cut into the end of the object 11 in a state where the object 11 is restrained more reliably, the object 1 can be further improved. 1 can be cut.

Further, in the above-described embodiment, the object-to-be-cut restraining means is constituted by the two objects-to-be-cut restraining members 8 and 9. However, in the present invention, the inelastic binding portion which does not elastically deform (the inelastic binding portion Can be composed of, for example, the cutting device body 2 or another member having no elasticity supported by the cutting device body 2) and the object-to-be-cut restraint member facing the inelastic restraining portion. An object to be cut may be configured. That is, the workpiece restraint is provided only on one side, and the workpiece is The cut object 11 that has been made to enter the cut object guide recess 5 enters between the inelastic restraining portion and the cut object restraining member, and only the cut object restraint member is in the inelastic restraint. The object 11 is elastically deformed so as to be separated from the portion, so that the object 11 is elastically sandwiched between the inelastic restraining portion and the object restraining member, and is bound in the thickness direction. Well ,.

Further, in the above-described embodiment, the cut object restraining members 8 and 9 are constituted by leaf springs. However, in the present invention, the cut object restraining members are constituted by springs other than leaf springs such as linear springs. May be. Further, the object-constraint restraint may be made of a material having rubber elasticity such as rubber or thermoplastic elastomer instead of a spring. Also, the object-to-be-cut restraint member may be configured not only by the elastic member as in the above-described embodiment but also by a combination of an elastic member and a non-elastic member. Further, as the material constituting the cut object restraining material, various materials such as plastic and ceramic can be used in addition to the material having metal and rubber elasticity. It is preferable to coat a low-friction material such as a fluorine resin on a portion that comes into contact with the workpiece in order to reduce frictional resistance.

Further, in the above embodiment, the linear blade 6 is used, but in the present invention, a non-linear blade such as a round blade may be used. Industrial applicability

As described above, the present invention

(1) Not only ordinary paper but also various cutting objects such as cardboard, cloth, hard or soft plastic sheets, or string-shaped cutting objects without any special skills Very easy and quick, can be cut very cleanly, (2) it is possible to substantially prevent the blade from being exposed, it is very safe, etc. is there.

Claims

Claims A cutting device main body, a cutting object guide recess provided in the cutting device main body and entering inward from an outer periphery of the cutting device main body, and a cutting edge is positioned in the cutting object guide recess. A blade attached to the cutter body, and a workpiece provided on the cutter body and penetrating into the workpiece guide recess toward the blade edge, the workpiece is And a cutting object restraining means for elastically restraining in the thickness direction at least in the vicinity of the cutting edge including at least a region in front of the cutting edge.

2. The cutter according to claim 1, wherein the object to be cut has a sheet shape or a string shape.

The cutting object restraining means includes a first cutting object restraining member and a second cutting object restraining member opposed to each other, and is provided in the cutting object guide recess toward the cutting edge. The cut object that has been intruded enters between the first cut object restraining member and the second cut object restraining member, and separates these cut object restraining members from each other. 3. The cutting device according to claim 1, wherein the cutting device is elastically deformed so as to be elastically sandwiched from both sides by the object restraint member.

The object-to-be-cut restricting means includes an inelastic restraining portion that is not elastically deformed, and an object-to-be-cut restricting member that faces the non-elastic restricting portion, and the object-to-be-cut guide recess toward the cutting edge. The object to be cut invaded into the space enters between the inelastic restraining portion and the object to be cut, and elastically moves the object to be separated from the inelastic restraining portion. 3. The cutting device according to claim 1, wherein the cutting device is elastically sandwiched between the inelastic restraining portion and the object to be cut by being deformed.

5. The cutting device according to claim 3, wherein the object to be cut has a spring. The cutter according to claim 5, wherein the spring is a leaf spring. 5. The cutting device according to claim 3, wherein the object to be cut is made of a material having rubber elasticity.

The cutting object restraint member is supported by the cutting device body so as to be movable within a certain range with respect to the cutting device body in a traveling direction of the cutting object. Cutting device.

9. The cutter according to claim 3, wherein the object to be cut is provided with a slit, and the cutting edge of the blade enters the slit.

Claims of amendment

[December 28, 2000 (28.12.00) Accepted by the International Bureau: Claims 1-9 at the time of filing were replaced with new claims 1-8. (After page 2)] (after correction) a cutting device main body, a cutting object guide concave portion provided on the cutting device main body and entering inward from the outer periphery of the cutting device main body, and a cutting object guiding concave portion A blade attached to the cutter body such that the blade edge is positioned at the blade; and a workpiece provided on the cutter body, the workpiece being intruded into the workpiece guide recess toward the blade edge. A cutting object restraining means for elastically restraining in the thickness direction at least in the vicinity of the cutting edge including the region in front of the cutting edge without hindering the movement of the cutting object. The object-constraining means includes a first object-constraining member and a second object-constraining member which are opposed to each other. The object to be cut invaded by the first object is By penetrating between the cut-piece restraining member and the second cut-piece restraining member and elastically deforming these cut-piece restraining members so as to be separated from each other, these cut-piece restraining members are elastically deformed from both sides. A cutting device that is configured to be sandwiched between two.

(After the correction) The object to be cut is configured so that the object to be cut is elastically restrained in the thickness direction of the blade and on both sides of the blade in the thickness direction of the cut portion. The cutting device according to claim 1.

3. The cutter according to claim 1, wherein the object to be cut is in a sheet shape or a string shape (after correction).

4. The cutter according to claim 1, 2 or 3, wherein (after the correction) the object-to-be-cut restraint has a spring.

5. The cutter according to claim 4, wherein the spring is a leaf spring (after correction).

4. The cutting device according to claim 1, wherein the object-to-be-cut object restraining member (after correction) is made of a material having rubber elasticity. Amended paper (Article 19 of the Convention)

7. (After correction) The object-constrained material is supported by the cutter body so as to be movable within a certain range in the traveling direction of the object relative to the cutter body. The cutter according to 3, 4, 5 or 6.

8. (After correction) The object to be cut is provided with a slit, and the cutting edge of the blade penetrates into the slit. Cutting device according to 6 or 7.

Amended paper (Article 19 of the Convention)